| Comment ?? | Comment Answer | Fault Code to display in UI | Fault Code in HEX (reported on IPC bus) | Sub Codes (in
decimal) (0=no code) |
Dealer Error Message | Possible Causes | Corrective Actions | IDU | ODU | System | Unit Type | Alarm Status | Consumer error message | Model Type | Pressure Alarms | Sensor Alarms | Safety Alarms | Communication Alarm | System Alarms | Fan Failure Alarm | ||||||
| [1] | A0[2] | 0x10 | External protection device activated | •External
protection device on terminals T1-T2 of the indoor unit is activated. •Defevtive indoor unit PCB. •Improper field setting. |
•Verify
if all wires are connected to T1 & T2.
If yes then set field setting accordingly. •Commonly used mode 22-1-03. |
x | All models | Safety error | Indoor unit(VRV, SkyAir) | A0 | ||||||||||||||||
| [3] | AO[4] | 0x10 | 01 | External protection device activated | •Activation
of external protection device. •Defective indoor unit PCB. •Indoor unit fuse blown. •24 VAC power is not supplied to TH2 & TR2 terminals (FXTQ-TA) or R and C terminals (CXTQ-TA) on indoor unit PCB. |
•Verify
if all wires are connected to T1 & T2.
If yes then set field setting accordingly. •Replace indoor unit PCB. •Check indoor unit PCB fuse. |
x | FXTQ-TA, CXTQ-TA | Safety error | FXTQ-TA, CXTQ-TA | ||||||||||||||||
| [5] | A1[6] | 0x11 | Indoor unit PCB abnormality | •Verify correct voltage to the
PCB •Verify the HAP green LED is blinking. •Wrong models interconnected. •Defective indoor unit PCB. •Disconnection of connector. •Reduction of power supply voltage. |
•Verify correct voltage to the
PCB. •Verify the HAP green LED is blinking. |
x | All models | System error | VRV, RA, Altherma | A1 | ||||||||||||||||
| A3[7] | 0x13 | Float switch error | •Drain
clogging. •Defective drain pump. •Defective float switch. •Defective indoor unit PCB. •208~230 VAC power is not provided. |
•Check
drain for clog. •Check drain pump and replace if needed. •Check indoor unit PCB and replace if needed. •Check for power loss. |
x | FXFQ-T,FXZQ-TA,FXUQ-P, FXEQ-P,FXDQ-M,FXMQ-PB,FXSQ-TA | Safety error | FXFQ-T,
FXZQ-TA, FXUQ-P, FXEQ-P, FXDQ-M, FXSQ-TA, FXMQ-PB RA |
A3 | |||||||||||||||||
| A4[8] | 0x14 | Freeze protection error | •Defective
water temperature sensor. •Low water temp temperature setting. •Water volume shortage. |
•Check
water temperature sensor. •Check water temperature setting. •Check water volume. |
x | System error | RA, VRV, SkyAir, Fan Coil | A4 | ||||||||||||||||||
| A5[9] | 0x15 | Heat exchanger temp error | •Clogged
indoor unit air filter. •Defective indoor unit heat exchanger thermistor. •Short-circuited air. •Dust accumulation on the indoor heat exchanger. •Detection error due to faulty hydro-box heat exchanger thermistor. •Detection error due to faulty hydro-box PCB. |
x | System error | RA, VRV, SkyAir, Fan Coil, Altherma | A5 | |||||||||||||||||||
| A6[10] | 0x16 | Fan motor error | •Defective
fan motor. •Defective indoor unit PCB. •Defective fan motor wire harness. •Abnormal signal output from the fan motor. •Fan motor lock (foreign matter blocking fan blades). •Connector between high-voltage and low-voltage is disconnected. •Bad contact •broken wires. •Indoor unit safety device activated. •High loading conditions. •Wrong system combination. |
•Check
for obstruction on the fan or motor. •Verify the input voltage at the motor. •Check for loose or broken wires. •Check indoor unit safety device. |
x | FXFQ-T,FXZQ-TA,FXUQ-P,FXEQ-P,FXSQ05-48TA,FXMQ07-12PB,FXAQ-P,FXSQ54TA,FXMQ15-54PB, | Fan failure error | RA (CTXS, FTXS, FVXS Series), RA FFQ Series, RA CDXS FDXS, FXFQ-T, FXZQ-TA, FXUQ-P, FXEQ-P, FXSQ05-48TA, FXMQ07-12PB, FXAQ-P, FXDQ-M, FXHQ-M, FXSQ54TA, FXMQ15-54PB, FXMQ-M, FXTQ-TA, VRV | A6 | |||||||||||||||||
| A6 | 01 | Indoor Fan Coil Fan Motor Lock or overlaod Fault | •Broken
wires in, short circuit of, or disconnection of connectors from the fan motor
harness. •Defective fan motor(Broken wires or defective insulation). •Abnormal signal output from the fan motor (defective circuit). • Defective indoor unit control PCB. •Instantaneous disturbance in the power supply voltage. •Fan motor lock(Due to motor or external causes). •The fan does not rotate due to foreign matter blocking the fan. •Disconnection of the connector between the high-power PCB (A1P) and the low-power PCB(A2P) (FXSQ05-48TA, FXMQ07-12PB only). |
Refer to Checks 16 and 17. | x | Fan failure error | VRV IV | |||||||||||||||||||
| A6 | 10 | Indoor Fan Coil Fan Motor Over Current Fault | •Defective indoor fan motor, Broken wires , Defective contact. | Refer to Checks 16 and 17. | x | Fan failure error | VRV IV | |||||||||||||||||||
| A6 | 11 | Fan position detection error | •Defective indoor fan motor, Broken wires , Defective contact. | x | Fan failure error | VRV IV | ||||||||||||||||||||
| A6 | 20 | Indoor Fan Motor Status Abnormality | •Fan or motor obstruction. •Blocked filters. •Power interruption (low voltage). •Incorrect wiring. •Blockage in the airflow (ductwork) or ductwork undersized. •High loading conditions. |
x | Refer to Fan Motor Check 19 | VRV IV | ||||||||||||||||||||
| A6 | 21 | Low Indoor Airflow | •Fan
or motor obstruction. •Blocked filters. •Restrictive ductwork or ductwork undersized. •Wiring disconnected. •Wrong outdoor and indoor combination. •Indoor fan motor failure. |
x | Refer to Fan Motor Check 19 | FXTQ-TA | ||||||||||||||||||||
| A7[11] | 0x17 | Swing flap motor error | •Defective
swing flap motor. •Defective indoor unit PCB. •Defective connection cable. •Defective airflow direction adjusting flap-cam. |
•Check for obstruction or jamming of the swing motor mechanism.check incoming power voltage.IDU with decoration panels swing motor to be connected to IDU PCB also check for service light on swing motor PCB. | x | FXHQ-M,FXAQ-P | minor | System error | FXHQ-M, FXAQ-P | A7 | ||||||||||||||||
| A8[12] | 0x18 | Power supply voltage error | •Defective
power supply voltage. •Loose or improper wiring. •Defective connection on signal line. •instantaneous power failure by others. •High AC line voltage to indoor blower motor. •Low AC line voltage to indoor blower motor. •Incorrect wiring |
•The
indoor unit periodically receives control status information from the fan
motor. •Error is issued when the information shows abnormality. •Error is detected by checking the input voltage of the fan motor. |
x | FXMQ-PB,FXSQ-TA | System error | FXTQ-TA, Indoor Unit (SkyAir, VRV) | A8 | |||||||||||||||||
| A8 | 01 | Power supply voltage error | •Defective power supply
voltage. •Defective connection on signal line. •Defective wiring. •Instantaneous power failure, others. |
x | System error | VRV | ||||||||||||||||||||
| A9[13] | 0x19 | Electronic expansion valve error | •Defective
electronic expansion valve coil. •Defective indoor unit PCB. •Defective relay cables. |
Refer to Expansion Valve Check 18 | x | FXFQ | System error | VRV | A9 | |||||||||||||||||
| A9[14] | 0x19 | 01 | Electronic expansion valve error | •Defective
electronic expansion valve coil. •Defective indoor unit PCB. •Defective relay cables. |
Refer to Expansion Valve Check 18 | x | VRV IV | System error | VRV IV | A9 | ||||||||||||||||
| A9[15] | 0x19 | 02 | Refrigerant leakage detection error | •Defective
electronic expansion valve coil. •Defective indoor unit PCB. •Defective relay cables. |
•Check
for deformation of the rubber packing on the EEV. •Check for Internal EEV leakage. •Turn Off target indoor unit and turn ON others in Cooling mode. •Operate target indoor unit in Fan Mode for 10 mins, If liquid pipe temperature decreases to evaporation temp the EEV must be replaced. |
x | VRV IV | System error | VRV IV | A9 | ||||||||||||||||
| AA | Back up or booster heater error | •Malfunction of the backup heater
relays [K1M, K2M]. •Incorrect parameter of the solar pump station (maximum tank temperature is too high, etc.). •Fuse FU2 blown. |
x | System error | Altherma | |||||||||||||||||||||
| AA | 03 | Gas furnace abnormality | •The
cause of the error differs depending on each error code of the gas furnace.
Refer to the gas furnace manual for details |
x | System error | VRV IV | ||||||||||||||||||||
| AC | Hydro-box: Open thermal protector / fuse of booster heater | •Malfunction of the booster heater
relay [K3M]. •Incorrect parameter of the solar pump station (maximum tank temperature is too high, etc.). |
x | System error | Altherma | |||||||||||||||||||||
| AF[16] | 0x1F | Drain level above limit error | •Humidifier
unit leaking. •Improper drain piping. •Defective indoor unit PCB. •Error in the drain pipe installation. • Defective float switch. |
•When the float switch changes from ON to OFF while the compressor is not in operation, Error code is displayed but the system operates continuously. | x | FXFQ-T,FXZQ-TA,FXUQ-p,FXEQ-P,FXDQ-M,FXSQ-TA,FXMQ-PB | minor | Safety error | RA | AH(B) | ||||||||||||||||
| AH | 0x1B | Dust collector error | •Defective
dust collecting element. •Stained insulator part. •Defective high voltage power supply. •Defective indoor unit PCB. |
x | System error | Indoor Unit (RA, SkyAir, VRV) |
||||||||||||||||||||
| AH | 03 | Transmission error (between the self-cleaning decoration panel and the indoor unit) [when the self-cleaning decoration panel is mounted] | •Check for the connection of the harness connector between thepanel PCB and the indoor unit PCB. | x | System error | VRV IV | ||||||||||||||||||||
| AH | 04 | Dust detection sensor error [when the self-cleaning decoration panel is mounted] | •Check for the connections of the connector X12A on the panel PCB and the connectors X18A and X19A on the sensor PCB. | System error | VRV IV | |||||||||||||||||||||
| AH | 05 | Dust collection sign error [when the self-cleaning decoration panel is mounted] | •Check for clogging with dust at the dust collection port as well asin the brush unit, S-shaped pipe, and dust box. Furthermore,check for any stains of the light receiving and emitting parts of theinfrared unit. | System error | VRV IV | |||||||||||||||||||||
| AH | 06 | Air filter rotation error [when the self-cleaning decoration panel is mounted] | •Check for anything getting in the way of rotating the filter (e.g. thefilter comes off or the drive gear is clogged with foreign matter). | System error | VRV IV | |||||||||||||||||||||
| AH | 07 | Damper rotation error [when the self-cleaning decoration panel is mounted] | •The
damper does not rotate normally. Check for any foreign matter around the damper and for the operation of the gear and limit switch. |
System error | VRV IV | |||||||||||||||||||||
| AH | 08 | Filter self-cleaning operation error [when the self-cleaning decoration panel is mounted] | •The unit has not yet completed
the filter self-cleaning operation even after the lapse of specified period of time. Check for any external noise, etc. |
System error | VRV IV | |||||||||||||||||||||
| AH | 09 | Filter self-cleaning operation start disabled error [when the self-cleaning decoration panel is mounted] | •The
unit has been put into a state in which the filter self-cleaning operation is disabled. Check the unit for the operating conditions |
System error | VRV IV | |||||||||||||||||||||
| AJ | 0x1D | Capacity setting error | •Capacity
setting adaptor was not installed when PCB was replaced. •Defective indoor unit PCB. |
•When replacing the IDU PCB board the capacity adaptor for the type of IDU has to be ordered. | x | All models | System error | Indoor Unit (SkyAir, VRV) |
||||||||||||||||||
| AJ | 01 | Capacity setting error | •There is an error in the capacity setting of the indoor unit PCB. | •When replacing the IDU PCB board the capacity adaptor for the type of IDU has to be ordered. | System error | VRV IV | ||||||||||||||||||||
| AJ | 02 | Electronic expansion valve setting error | •There is a fault in the setting
of the gear type electronic expansion valve/direct acting type electronic expansion valve. |
•When replacing the IDU PCB board the capacity adaptor for the type of IDU has to be ordered. | System error | VRV IV | ||||||||||||||||||||
| C0 | Hydro-box: Flow switch failure | •Blocked
flow switch. •Malfunction of the flow switch. •Water flow caused by external source. |
System error | Altherma | ||||||||||||||||||||||
| C1 | 0x21 | PCB communication error | •Defective
connection between PCB's. •Incorrect or loose wiring. •Communication wires between the CXTQ-TA and the gas furnace are disconnected. •Power supply to gas furnace is off. •Defective indoor unit control PCB (A1P). •Defective fan PCB (A2P). •Instantaneous power failure. |
•Connection defective the
connector between indoor unit control PCB (A1P) and fan PCB (A2P). •Defective indoor unit control PCB (A1P). •Defective fan PCB (A2P). •External factor, such as instantaneous power failure. |
x | FXMQ-PB,FXSQ-TA | Communication error | Indoor Unit (SkyAir, VRV) |
||||||||||||||||||
| C1 | 01 | Transmission error (between indoor unit PCB and the PCB for the fan) | •Connection
defective the connector between indoor unit control PCB (A1P) and fan PCB
(A2P). •Defective indoor unit control PCB (A1P). •Defective fan PCB (A2P). •External factor, such as instantaneous power failure. |
•In case of voltage drop a phase monitor protection might be an advantage. | Communication error | VRV IV | ||||||||||||||||||||
| C1 | 07 | Blower Motor Communication Error | •Incorrect or loose wiring. •Power interruption (low voltage). |
•Check wiring or tighten wiring
connections if needed. •Verify the input voltage at the motor. •Replace the indoor unit control PCB or motor. |
Communication error | VRV | ||||||||||||||||||||
| C1 | 08 | Climate Talk Communication Error | •Disconnection
of the communication wire between the CXTQ-TA and the gas furnace. •Power supply to the gas furnace is cut. |
•In case of voltage drop a phase monitor protection might be an advantage. | Communication error | VRV | ||||||||||||||||||||
| C4[17] | 0x24 | Thermistor error | •Defective
liquid pipe thermistor. •Defective indoor unit PCB. •Loose or broken thermistor wires. |
•Refer to VRV IVX Thermister Check 11. | x | All models | Sensor error | RA | C4 | |||||||||||||||||
| C5[18] | 0x25 | Thermistor error | •Defective
gas pipe thermistor. •Defective indoor unit PCB. •Loose or broken thermistor wires. |
•Refer
to RA Check 1. •Refer to VRV IVX Thermister Check 11 |
x | All models | Sensor error | RA, VRV | C5 | |||||||||||||||||
| C6[19] | 0x26 | IDU PCB and fan PCB combination error | •Defective
fan PCB (A2P). •Loose or broken adaptor wires. •Field setting error. •Wrong size motor. •Indoor unit capacity setting error. •Locked motor. •Defective indoor unit PCB or motor. |
•Install
correct motor. •Choose correct capacity setting. •Checked for locked rotor conditions. •Replace the indoor unit control PCB or motor |
x | FXMQ-PB,FXSQ-TA | Fan failure error | VRV IV | C6 | |||||||||||||||||
| C6 | 01 | Blower Motor HP Mismatch | •Incorrect
size motor. •Indoor unit capacity setting error. |
•Correct
motor installation. •Correct the indoor unit capacity setting. |
Fan failure error | FXTQ-TA | ||||||||||||||||||||
| C6 | 02 | Indoor
Blower Does Not Have Required Parameters to Function |
•Locked motor rotor condition. | •Check for locked rotor
condition. •Replace the indoor unit control PCB or motor. |
Fan failure error | FXTQ-TA | ||||||||||||||||||||
| C7[20] | 0x27 | Direction of air flow adj. motor lock sensor error | •Defective
front panel driving motor. •Defective limit switch. |
x | Fan failure error | C7 | ||||||||||||||||||||
| [21] | C9[22] | 0x29 | Thermistor or remote sensor error | •Defective
return air thermistor. •Defective indoor unit PCB. •Loose or broken wires. •Defective indoor unit thermistor (R1T ) •Defective indoor unit control PCB. |
•Defective
indoor unit thermistor (R1T) for room temperature. •Defective indoor unit control PCB. •Disconnection of connector. •Thermistor corresponding to the error code is defective. |
x | All models except TXTQ-TA & CXTQ-TA | Sensor error | RA, FXTQ-TA, CXTQ-TA, VRV | C9 | ||||||||||||||||
| [23] | CA[24] | 0x2A | Discharge air temp sensor error | •Defective
discharge air sensor. •Defective indoor unit PCB. •Loose or broken wires. |
•Malfunction of discharge air thermistor | x | FXMQ-PB | Sensor error | C4,
C5: All indoor units C9: except FXTQ-TA and CXTQ-TA models CA: FXMQ-PB models only |
CA | ||||||||||||||||
| CC[25] | 0x2C | Humidity sensor error | •Defective
humidity sensor. •Loose or broken wires. |
x | FXFQ-T | Sensor error | FXFQ-T | CC | ||||||||||||||||||
| CE | 0x2E | 01 | Infrared sensor error | •Defective
infrared floor sensor. |
•See diagnosis procedure 1 in the service manual | x | FXFQ-T,FXUQ-P | Sensor error | FXFQ-T, FXUQ-P | CE | ||||||||||||||||
| CE | 0x2E | 02 | Infrared sensor error | •Defective
infrared floor sensor |
•See diagnosis procedure 2 in the service manual | x | FXFQ-T,FXUQ-P | Sensor error | FXFQ-T, FXUQ-P | |||||||||||||||||
| CE | 0x2E | 03 | Infrared sensor error | •Defective
infrared floor sensor |
•See diagnosis procedure 3 in the service manual | x | FXFQ-T,FXUQ-P | Sensor error | FXFQ-T, FXUQ-P | |||||||||||||||||
| CE | 0x2E | 04 | Infrared sensor error | •Defective floor sensor element. | •See diagnosis procedure 4 in the service manual | x | FXFQ-T,FXUQ-P | Sensor error | FXFQ-T, FXUQ-P | |||||||||||||||||
| CJ | 0x2D | Remote controller temperature sensor error | •Defective
remote controller room temperature thermistor. •Defective remote controller PCB. •External factor (noise, etc.) |
•Malfunction of thermostat sensor in remote controller. | x | All models | minor | Sensor error | Indoor
Unit (RA,SkyAir, VRV) |
|||||||||||||||||
| What protection device?[26] | reserved for future use | E0[27] | 0x30 | Protection device activation error | •Outdoor
unit PCB protection device activated. •loos or broken wires. |
x | Safety error | E0 | ||||||||||||||||||
| What is PCB?[28] | PCB is a control board. | E1[29] | 0x31 | Outdoor unit main PCB error/Defect of compressor compartment PCB | •Defective
outdoor unit PCB. •Loose or broken connector wires. •Out of control of microcomputer caused by external factors •Noise. •Momentary fall of voltage. •Momentary power loss. •Defective outdoor unit PCB. |
•Defect of OD unit PCB. | x | All models | System error | Condensing
Unit (RA, SkyAir, VRV), Altherma |
E1 | |||||||||||||||
| E1 | 01 | Outdoor unit PCB error | •Defective outdoor unit PCB
(A1P). •Defective connection communication line between indoor and outdoor units. |
•Cycle power to outdoor master unit if error doesn't clear replace A1P board. | x | System error | VRV IV | |||||||||||||||||||
| E1 | 02 | Defective outdoor unit PCB | •Defective
outdoor unit PCB (A1P). •Defective connection communication line between indoor and outdoor units. |
•Cycle power to outdoor master unit if error doesn't clear replace A1P board. | x | System error | VRV IV | |||||||||||||||||||
| E2 | 0x32 | 01 | Ground leakage detection error-Master Unit | •Ground
fault. •Improper wiring passing through the current sensor. •Temporary liquid compression or melting in compressor. |
•Check if the connection to the current sensor (T1A) is correctly wired. | x | All models | System error | VRV IV | |||||||||||||||||
| E2 | 02 | Ground leakage detection error-Slave Unit 1 | •Ground
fault. •Improper wiring passing through the current sensor. •Temporary liquid compression or melting in compressor. |
•Use megohmeter to test for short to ground on comressor and fan motors of Slave 1 OU. | x | System error | VRV IV | |||||||||||||||||||
| E2 | 03 | Ground leakage detection error-Slave Unit 2 | •Ground
fault. •Improper wiring passing through the current sensor. •Temporary liquid compression or melting in compressor. |
•Use megohmeter to test for short to ground on comressor and fan motors of Slave 2 OU. | x | System error | VRV IV | |||||||||||||||||||
| E2 | 0x32 | 06 | Missing of ground leakage detection core-Master unit | •Disconnection
of connector X101A. •Loose or disconnected wiring. •Defective outdoor unit main PCB. |
•Verify terminal X101A is connected on A1P board on Master OU. | x | All models | System error | VRV IV | |||||||||||||||||
| E2 | 07 | Missing of ground leakage detection core-Salve unit 1 | •Disconnection
of connector X101A. •Loose or disconnected wiring. •Defective outdoor unit main PCB. |
•Verify terminal X101A is connected on A1P board on Slave 1 OU. | x | System error | VRV IV | |||||||||||||||||||
| E2 | 08 | Missing of ground leakage detection core-Slave unit 2 | •Disconnection
of connector X101A. •Loose or disconnected wiring. •Defective outdoor unit main PCB. |
•Verify terminal X101A is connected on A1P board on Slave 2 OU. | x | System error | VRV IV | |||||||||||||||||||
| E3 | Actuation of High Pressure Switch | •Faulty
high pressure switch. •Disconnection in high pressure switch harness. •Faulty connection of high pressure switch connector. •Clogged hydraulic compartment suction filter (in heating operation). •Dirty compressor compartment heat exchanger. •Faulty compressor compartment fan. •Refrigerant overcharge. •Stop valve is left closed. •Activation of high pressure switch. •Defective outdoor unit main PCB (A1P). •Momentary power failure. •Defective high pressure sensor. |
•Refer to Altherma Check 1,
6. •Verify Continuity across pressure switch contacts. |
x | System error | Altherma
MonoBloc, Condensing Unit (RA, SkyAir, VRV) |
||||||||||||||||||||
| E3 | 01 | Actuation of high pressure switch (HPS)-Master unit | •Activation
of high pressure switch. •Defective high pressure switch. •Defective control PCB (A1P). •Momentary power failure. •Defective high pressure sensor. |
•Refer to Check 1 and Check 12. | x | System error | VRV IV | |||||||||||||||||||
| E3 | 02 | High pressure - refrigerant overcharge or closed stop valve – Master unit | •Activation of high pressure
switch. •Defective high pressure switch. •Defective control PCB (A1P). •Momentary power failure. •Defective high pressure sensor. |
•Refer to Check 1 and Check 12. | x | System error | VRV IV | |||||||||||||||||||
| E3 | 04 | High pressure - refrigerant overcharge or closed stop valve – Slave unit 1 | •Activation
of high pressure switch. •Defective high pressure switch. •Defective control PCB (A1P). •Momentary power failure. •Defective high pressure sensor. |
•Refer to Check 1 and Check 12. | x | System error | VRV IV | |||||||||||||||||||
| E3 | 05 | Actuation of high pressure switch – Slave unit 2 | •Activation of high pressure
switch. •Defective high pressure switch. •Defective control PCB (A1P). •Momentary power failure. •Defective high pressure sensor. |
•Refer to Check 1 and Check 12. | x | System error | VRV IV | |||||||||||||||||||
| E3 | 06 | High pressure - refrigerant overcharge or closed stop valve – Slave unit 2 | •Activation
of high pressure switch. •Defective high pressure switch. •Defective control PCB (A1P). •Momentary power failure. •Defective high pressure sensor. |
•Refer to Check 1 and Check 12. | x | System error | VRV IV | |||||||||||||||||||
| E3 | 07 | High pressure standby E3 latch
error (System integrated) |
•Activation of high pressure
switch. •Defective high pressure switch. •Defective control PCB (A1P). •Momentary power failure. •Defective high pressure sensor. |
•Refer to Check 1 and Check 12. | x | System error | VRV IV | |||||||||||||||||||
| E3 | 13 | Liquid valve error-Master unit | •Activation
of high pressure switch. •Defective high pressure switch. •Defective control PCB (A1P). •Momentary power failure. •Defective high pressure sensor. |
•Refer to Check 1 and Check 12. | x | All models | Pressure error | VRV IV | ||||||||||||||||||
| E3 | 14 | Liquid valve error-Slave unit 1 | •Activation of high pressure
switch. •Defective high pressure switch. •Defective control PCB (A1P). •Momentary power failure. •Defective high pressure sensor. |
•Refer to Check 1 and Check 12. | x | All models | Pressure error | VRV IV | ||||||||||||||||||
| E3 | 15 | Liquid valve error-Slave unit 2 | •Activation
of high pressure switch. •Defective high pressure switch. •Defective control PCB (A1P). •Momentary power failure. •Defective high pressure sensor. |
•Refer to Check 1 and Check 12. | x | All models | Pressure error | VRV IV | ||||||||||||||||||
| E3 | 18 | Overall retry of high pressure switch | •Abnormal drop in low
pressure. •Defective low pressure sensor. •Defective outdoor unit main PCB. •The stop valve is not opened. |
•Refer to Check 1 and Check 12. | x | All models | Pressure error | VRV IV | ||||||||||||||||||
| E4[30] | 0x34 | Low pressure sensor error | •Abnormal
drop in pressure. •Defective low pressure sensor. •Defective outdoor main PCB. •Stop valve is not opened. •Faulty pressure sensor and intermittent harness. •Faulty compressor compartment PC board. •Abnormal drop of low pressure. (inadequate refrigerant) (Abnormal refrigerant piping system (liquid pipe system)) (Faulty electronic expansion valve) |
Verify Continuity across pressure switch contacts. | x | All models | Pressure error | Condensing
Unit (SkyAir, VRV), Altherma MonoBloc |
E4 | |||||||||||||||||
| E4[31] | 01 | Low pressure sensor error-Master unit | •Abnormally drop in low
pressure. •Defective low pressure sensor. •Defective outdoor unit PCB. •The stop valve is not opened. |
•Refer to Check 2 and 12. | x | All models | Pressure error | VRV IV | ||||||||||||||||||
| E4[32] | 02 | Low pressure sensor error-Slave unit 1 | •Abnormally
drop in low pressure. •Defective low pressure sensor. •Defective outdoor unit PCB. •The stop valve is not opened. |
•Refer to Check 2 and 12. | x | All models | Pressure error | VRV IV | ||||||||||||||||||
| E4[33] | 03 | Low pressure sensor error-Slave unit 2 | •Abnormally drop in low
pressure. •Defective low pressure sensor. •Defective outdoor unit PCB. •The stop valve is not opened. |
•Refer to Check 2 and 12. | x | All models | Pressure error | VRV IV | ||||||||||||||||||
| E5[34] | 0x35 | Compressor motor overload error | •Inverter
compressor lock. •High differential pressure. •Defective PCB. •Stop valve is not opened. •Refrigerant shortage. •Four way valve malfunctioning. •Outdoor unit PCB defective. •Water mixed in the local piping. •Electronic expansion valve defective. •Stop valve defective. •Compressor lock. •High differential pressure (0.5 MPa (72.5 psi) or more). •UVW connection error. |
Refer
to Altherma Check 4, 5, 6, 11. •Refer to Power Transistor Check 4 |
x | All models | System error | Altherma, RA, VRV, Skyair | E5 | |||||||||||||||||
| E5[35] | 01 | Inverter compressor 1 lock-Master unit | •Inverter compressor lock. •High differential pressure (72.5 psi or more). •UVW connection error. •Defective inverter PCB. •The stop valve is not opened. |
Refer to Power Transistor Check 4 | x | System error | VRV IV | |||||||||||||||||||
| E5[36] | 02 | Inverter compressor 1 lock-Slave unit 1 | •Inverter
compressor lock. •High differential pressure (72.5 psi or more). •UVW connection error. •Defective inverter PCB. •The stop valve is not opened. |
Refer to Power Transistor Check 4 | x | System error | VRV IV | |||||||||||||||||||
| E5[37] | 03 | Inverter compressor 1 lock-Slave unit 2 | •Inverter compressor lock. •High differential pressure (72.5 psi or more). •UVW connection error. •Defective inverter PCB. •The stop valve is not opened. |
Refer to Power Transistor Check 4 | x | System error | VRV IV | |||||||||||||||||||
| E5[38] | 07 | Inverter compressor 2 lock-Master unit | •Inverter
compressor lock. •High differential pressure (72.5 psi or more). •UVW connection error. •Defective inverter PCB. •The stop valve is not opened. |
•Verify
correct voltage and phase balance. •Test diode bridge and power transistors check 4 in service manual. •Meg ohm compressor. |
x | System error | VRV IV | |||||||||||||||||||
| E5[39] | 08 | Inverter compressor 2 lock-Slave unit 1 | •Inverter compressor lock. •High differential pressure (72.5 psi or more). •UVW connection error. •Defective inverter PCB. •The stop valve is not opened. |
•Verify correct voltage and phase
balance. •Test diode bridge and power transistors check 4 in service manual. •Meg ohm compressor. |
x | System error | VRV IV | |||||||||||||||||||
| E5 | 09 | Inverter compressor 2 lock-Slave unit 2 | •Inverter
compressor lock. •High differential pressure (72.5 psi or more). •UVW connection error. •Defective inverter PCB. •The stop valve is not opened. |
•Verify
correct voltage and phase balance. •Test diode bridge and power transistors check 4 in service manual. •Meg ohm compressor. |
x | System error | VRV IV | |||||||||||||||||||
| E6[40] | 0x36 | Compressor damage error | •Defective
compressor. •Defective high pressure sensor. •Defective low pressure sensor. •Defective ODU main PCB. •Defective inverter PCB. •Closed stop valve. •Defective electronic expansion valve. |
•Refer to Power Transistor Check 4 and Pressure Sensor Check 12. | x | All models | System error | RA, Altherma, VRV, Skyair | E6 | |||||||||||||||||
| E6[41] | 11 | Compressor damage error:Compressor M1C (master) | •Defective
compressor. •Defective high pressure sensor. •Defective low pressure sensor. •Defective outdoor unit main PCB. •Defective inverter PCB. |
•Refer to Power Transistor Check 4 and Pressure Sensor Check 12. | x | System error | VRV IV | |||||||||||||||||||
| E6[42] | 13 | Compressor damage error-Compressor M1C (slave 1) | •Defective compressor. •Defective high pressure sensor. •Defective low pressure sensor. •Defective outdoor unit main PCB. •Defective inverter PCB. |
•Refer to Power Transistor Check 4 and Pressure Sensor Check 12. | x | System error | VRV IV | |||||||||||||||||||
| E6[43] | 15 | Compressor damage error-Compressor M1C (slave 2) | •Defective
compressor. •Defective high pressure sensor. •Defective low pressure sensor. •Defective outdoor unit main PCB. •Defective inverter PCB. |
•Refer to Power Transistor Check 4 and Pressure Sensor Check 12. | x | System error | VRV IV | |||||||||||||||||||
| E6[44] | 17 | Compressor damage warning:Compressor M1C (master) | •Defective compressor. •Defective high pressure sensor. •Defective low pressure sensor. •Defective outdoor unit main PCB. •Defective inverter PCB. |
•Refer to Power Transistor Check 4 and Pressure Sensor Check 12. | x | System error | VRV IV | |||||||||||||||||||
| E6[45] | 19 | Compressor damage warning-Compressor M1C (slave 1) | •Defective
compressor. •Defective high pressure sensor. •Defective low pressure sensor. •Defective outdoor unit main PCB. •Defective inverter PCB. |
•Refer to Power Transistor Check 4 and Pressure Sensor Check 12. | x | System error | VRV IV | |||||||||||||||||||
| E6[46] | 21 | Compressor damage warning-Compressor M1C (slave 2) | •Defective compressor. •Defective high pressure sensor. •Defective low pressure sensor. •Defective outdoor unit main PCB. •Defective inverter PCB. |
•Refer to Power Transistor Check 4 and Pressure Sensor Check 12. | x | System error | VRV IV | |||||||||||||||||||
| E7[47] | 0x37 | Outdoor fan motor/DC Fan Lock error | •Defective
fan motor. •Clearing condition: fan motor performs normal operation for a period of 5 minutes •Fan motor can not rotate due to obstruction. •Loose wire harness connection. •Missing L1 voltage. •Defective outdoor unit PCB |
Refer to Fan Motor Check 16 and 17 Final | x | REYQ-XATJU,REYQ-XAYDU | System error | RA, VRV, Skyair, Altherma | E7 | |||||||||||||||||
| E7 | 01 | Fan motor 1 lock – Master unit | •Fan motor failure. •Neglect to connect or defective connection of harness/connector between the fan motor and the PCB. •Fan does not rotate due to foreign matter caught in it. •Clearing condition: fan motor performs normal operation for a period of 5 minutes. |
Refer to Fan Motor Check 16 and 17 Final | x | System error | VRV IV | |||||||||||||||||||
| E7 | 02 | Fan motor 2 lock – Master unit | •Fan
motor failure. •Neglect to connect or defective connection of harness/connector between the fan motor and the PCB. •Fan does not rotate due to foreign matter caught in it. •Clearing condition: fan motor performs normal operation for a period of 5 minutes. |
Refer to Fan Motor Check 16 and 17 Final | x | System error | VRV IV | |||||||||||||||||||
| E7 | 05 | Fan motor 1 momentary overcurrent – Master unit | •Fan motor failure. •Neglect to connect or defective connection of harness/connector between the fan motor and the PCB. •Fan does not rotate due to foreign matter caught in it. •Clearing condition: fan motor performs normal operation for a period of 5 minutes. |
Refer to Fan Motor Check 16 and 17 Final | x | System error | VRV IV | |||||||||||||||||||
| E7 | 06 | Fan motor 2 momentary overcurrent – Master unit | •Fan
motor failure. •Neglect to connect or defective connection of harness/connector between the fan motor and the PCB. •Fan does not rotate due to foreign matter caught in it. •Clearing condition: fan motor performs normal operation for a period of 5 minutes. |
Refer to Fan Motor Check 16 and 17 Final | x | System error | VRV IV | |||||||||||||||||||
| E7 | 09 | Fan motor 1 IPM error – Master unit | •Fan motor failure. •Neglect to connect or defective connection of harness/connector between the fan motor and the PCB. •Fan does not rotate due to foreign matter caught in it. •Clearing condition: fan motor performs normal operation for a period of 5 minutes. |
Refer to Fan Motor Check 16 and 17 Final | x | System error | VRV IV | |||||||||||||||||||
| E7 | 10 | Fan Motor M2F IPM Error in Master unit | •Fan
motor failure. •Neglect to connect or defective connection of harness/connector between the fan motor and the PCB. •Fan does not rotate due to foreign matter caught in it. •Clearing condition: fan motor performs normal operation for a period of 5 minutes. |
Refer to Fan Motor Check 16 and 17 Final | x | System error | VRV IV | |||||||||||||||||||
| E7 | 13 | Fan motor M1F lock ( Sub Unit 1) | •Fan motor failure. •Neglect to connect or defective connection of harness/connector between the fan motor and the PCB. •Fan does not rotate due to foreign matter caught in it. •Clearing condition: fan motor performs normal operation for a period of 5 minutes. |
Refer to Fan Motor Check 16 and 17 Final | x | System error | VRV IV | |||||||||||||||||||
| E7 | 14 | Fan motor M2F lock (Sub Unit 1) | •Fan
motor failure. •Neglect to connect or defective connection of harness/connector between the fan motor and the PCB. •Fan does not rotate due to foreign matter caught in it. •Clearing condition: fan motor performs normal operation for a period of 5 minutes. |
Refer to Fan Motor Check 16 and 17 Final | x | System error | VRV IV | |||||||||||||||||||
| E7 | 17 | Fan motor M1F momentary overcurrent (Sub Unit 1) | •Fan motor failure. •Neglect to connect or defective connection of harness/connector between the fan motor and the PCB. •Fan does not rotate due to foreign matter caught in it. •Clearing condition: fan motor performs normal operation for a period of 5 minutes. |
Refer to Fan Motor Check 16 and 17 Final | x | System error | VRV IV | |||||||||||||||||||
| E7 | 18 | Fan motor M2F momentary overcurrent (Sub Unit 1) | •Fan
motor failure. •Neglect to connect or defective connection of harness/connector between the fan motor and the PCB. •Fan does not rotate due to foreign matter caught in it. •Clearing condition: fan motor performs normal operation for a period of 5 minutes. |
Refer to Fan Motor Check 16 and 17 Final | x | System error | VRV IV | |||||||||||||||||||
| E7 | 21 | Fan motor M1F IPM error (Sub Unit 1) | •Fan motor failure. •Neglect to connect or defective connection of harness/connector between the fan motor and the PCB. •Fan does not rotate due to foreign matter caught in it. •Clearing condition: fan motor performs normal operation for a period of 5 minutes. |
Refer to Fan Motor Check 16 and 17 Final | x | System error | VRV IV | |||||||||||||||||||
| E7 | 22 | Fan motor M2F IPM error (Sub Unit 1) | •Fan
motor failure. •Neglect to connect or defective connection of harness/connector between the fan motor and the PCB. •Fan does not rotate due to foreign matter caught in it. •Clearing condition: fan motor performs normal operation for a period of 5 minutes. |
Refer to Fan Motor Check 16 and 17 Final | x | System error | VRV IV | |||||||||||||||||||
| E7 | 25 | Fan motor M1F lock (Sub Unit 2) | •Fan motor failure. •Neglect to connect or defective connection of harness/connector between the fan motor and the PCB. •Fan does not rotate due to foreign matter caught in it. •Clearing condition: fan motor performs normal operation for a period of 5 minutes. |
Refer to Fan Motor Check 16 and 17 Final | x | System error | VRV IV | |||||||||||||||||||
| E7 | 26 | Fan motor M2F lock (Sub Unit 2) | •Fan
motor failure. •Neglect to connect or defective connection of harness/connector between the fan motor and the PCB. •Fan does not rotate due to foreign matter caught in it. •Clearing condition: fan motor performs normal operation for a period of 5 minutes. |
Refer to Fan Motor Check 16 and 17 Final | x | System error | VRV IV | |||||||||||||||||||
| E7 | 29 | Fan motor M1F momentary overcurrent (Sub Unit 2) | •Fan motor failure. •Neglect to connect or defective connection of harness/connector between the fan motor and the PCB. •Fan does not rotate due to foreign matter caught in it. •Clearing condition: fan motor performs normal operation for a period of 5 minutes. |
Refer to Fan Motor Check 16 and 17 Final | x | System error | VRV IV | |||||||||||||||||||
| E7 | 30 | Fan motor 2 momentary overcurrent – Slave unit 2 | •Fan
motor failure. •Neglect to connect or defective connection of harness/connector between the fan motor and the PCB. •Fan does not rotate due to foreign matter caught in it. •Clearing condition: fan motor performs normal operation for a period of 5 minutes. |
Refer to Fan Motor Check 16 and 17 Final | x | System error | VRV IV | |||||||||||||||||||
| E7 | 33 | Fan motor 1 IPM error – Slave unit 2 | •Fan motor failure. •Neglect to connect or defective connection of harness/connector between the fan motor and the PCB. •Fan does not rotate due to foreign matter caught in it. •Clearing condition: fan motor performs normal operation for a period of 5 minutes. |
Refer to Fan Motor Check 16 and 17 Final | x | System error | VRV IV | |||||||||||||||||||
| E7 | 34 | Fan motor 2 IPM error – Slave unit 2 | •Fan
motor failure. •Neglect to connect or defective connection of harness/connector between the fan motor and the PCB. •Fan does not rotate due to foreign matter caught in it. •Clearing condition: fan motor performs normal operation for a period of 5 minutes. |
Refer to Fan Motor Check 16 and 17 Final | x | System error | VRV IV | |||||||||||||||||||
| E8[48] | 0x38 | Compressor overcurrent error | •Defective
compressor. •Defective inverter main circuit capacitor . •Defective outdoor unit PCB. •Defective power transistor. •Over-current due to compressor failure. •Over-current due to defective power transistor. •Over-current due to defective inverter main circuit electrolytic capacitor. •Over-current due to defective outdoor unit PCB. •Error detection due to outdoor unit PCB. •Over-current due to short-circuit. |
•RA Check 15, 17, 18. •Refer to Altherma Check 7, 8, 14. |
x | System error | RA, Altherma split | E8 | ||||||||||||||||||
| E9[49] | 0x39 | Electronic expansion valve error | •Over-current
due to compressor failure. •Over-current due to defective power transistor. •Over-current due to defective inverter main circuit electrolytic capacitor. •Over-current due to defective outdoor unit PCB. •Error detection due to outdoor unit PCB. •Over-current due to short-circuit. |
x | All models | System error | Altherma MonoBloc | E9 | ||||||||||||||||||
| E9 | 01 | Electronic expansion valve (Y1E) error – Master unit | •Disconnection of connectors from
electronic expansion valves. •Defective electronic expansion valve coil. •Defective outdoor unit main PCB. |
•Refer to Expansion Valve Check 18. | x | System error | VRV IV | |||||||||||||||||||
| E9 | 03 | Electronic expansion valve (Y2E) error – Master unit | •Disconnection
of connectors from electronic expansion valves. •Defective electronic expansion valve coil. •Defective outdoor unit main PCB. |
•Refer to Expansion Valve Check 18. | x | System error | VRV IV | |||||||||||||||||||
| E9 | 04 | Electronic expansion valve (Y3E) error – Master unit | •Disconnection of connectors from
electronic expansion valves. •Defective electronic expansion valve coil. •Defective outdoor unit main PCB. |
•Refer to Expansion Valve Check 18. | x | System error | VRV IV | |||||||||||||||||||
| E9 | 05 | Electronic expansion valve (Y1E) error – Slave unit 1 | •Disconnection
of connectors from electronic expansion valves. •Defective electronic expansion valve coil. •Defective outdoor unit main PCB. |
•Refer to Expansion Valve Check 18. | x | System error | VRV IV | |||||||||||||||||||
| E9 | 06 | Electronic expansion valve (Y2E) error – Slave unit 1 | •Disconnection of connectors from
electronic expansion valves. •Defective electronic expansion valve coil. •Defective outdoor unit main PCB. |
•Refer to Expansion Valve Check 18. | x | System error | VRV IV | |||||||||||||||||||
| E9 | 07 | Electronic expansion valve (Y3E) error – Slave unit 1 | •Disconnection
of connectors from electronic expansion valves. •Defective electronic expansion valve coil. •Defective outdoor unit main PCB. |
•Refer to Expansion Valve Check 18. | x | System error | VRV IV | |||||||||||||||||||
| E9 | 08 | Electronic expansion valve (Y1E) error – Slave unit 2 | •Disconnection of connectors from
electronic expansion valves. •Defective electronic expansion valve coil. •Defective outdoor unit main PCB. |
•Refer to Expansion Valve Check 18. | x | System error | VRV IV | |||||||||||||||||||
| 09 | Electronic expansion valve (Y2E) error – Slave unit 2 | •Disconnection
of connectors from electronic expansion valves. •Defective electronic expansion valve coil. •Defective outdoor unit main PCB. |
•Refer to Expansion Valve Check 18. | x | VRV IV | |||||||||||||||||||||
| E9 | 10 | Electronic expansion valve (Y3E) error – Slave unit 2 | •Disconnection of connectors from
electronic expansion valves. •Defective electronic expansion valve coil. •Defective outdoor unit main PCB. |
•Refer to Expansion Valve Check 18. | x | System error | VRV IV | |||||||||||||||||||
| E9 | 20 | Defective electronic expansion valve 1 coil (Y1E) – Master unit | •Disconnection
of connectors from electronic expansion valves. •Defective electronic expansion valve coil. •Defective outdoor unit main PCB. |
•Refer to Expansion Valve Check 18. | x | System error | VRV IV | |||||||||||||||||||
| E9 | 21 | Defective electronic expansion valve 1 coil (Y1E) – Slave unit 1 | •Disconnection of connectors from
electronic expansion valves. •Defective electronic expansion valve coil. •Defective outdoor unit main PCB. |
•Refer to Expansion Valve Check 18. | x | System error | VRV IV | |||||||||||||||||||
| E9 | 22 | Defective electronic expansion valve 1 coil (Y1E) – Slave unit 2 | •Disconnection
of connectors from electronic expansion valves. •Defective electronic expansion valve coil. •Defective outdoor unit main PCB. |
•Refer to Expansion Valve Check 18. | x | System error | VRV IV | |||||||||||||||||||
| E9 | 23 | Defective electronic expansion valve 2 coil (Y2E) – Master unit[50] | •Disconnection of connectors from
electronic expansion valves. •Defective electronic expansion valve coil. •Defective outdoor unit main PCB. |
•Refer to Expansion Valve Check 18. | x | System error | VRV IV | |||||||||||||||||||
| E9 | 24 | Defective electronic expansion valve 2 coil (Y2E) – Slave unit 1 | •Disconnection
of connectors from electronic expansion valves. •Defective electronic expansion valve coil. •Defective outdoor unit main PCB. |
•Refer to Expansion Valve Check 18. | x | System error | VRV IV | |||||||||||||||||||
| E9 | 25 | Defective electronic expansion
valve coil (Y2E) (Slave 2) |
•Disconnection of connectors from
electronic expansion valves. •Defective electronic expansion valve coil. •Defective outdoor unit main PCB. |
•Refer to Expansion Valve Check 18. | x | System error | VRV IV | |||||||||||||||||||
| E9 | 26 | Electronic expansion valve (Y4E) error – Master unit | •Disconnection
of connectors from electronic expansion valves. •Defective electronic expansion valve coil. •Defective outdoor unit main PCB. |
•Refer to Expansion Valve Check 18. | x | System error | VRV IV | |||||||||||||||||||
| E9 | 27 | Electronic expansion valve (Y4E) error – Slave 1 unit | •Disconnection of connectors from
electronic expansion valves. •Defective electronic expansion valve coil. •Defective outdoor unit main PCB. |
•Refer to Expansion Valve Check 18. | x | System error | VRV IV | |||||||||||||||||||
| E9 | 28 | Electronic expansion valve (Y4E) error – Slave 2 unit | •Disconnection
of connectors from electronic expansion valves. •Defective electronic expansion valve coil. •Defective outdoor unit main PCB. |
•Refer to Expansion Valve Check 18. | x | System error | VRV IV | |||||||||||||||||||
| E9 | 29 | Electronic expansion valve (Y5E) error – Master unit | •Disconnection of connectors from
electronic expansion valves. •Defective electronic expansion valve coil. •Defective outdoor unit main PCB. |
•Refer to Expansion Valve Check 18. | x | System error | VRV IV | |||||||||||||||||||
| E9 | 32 | Electronic expansion valve (Y7E) error – Master unit | •Disconnection
of connectors from electronic expansion valves. •Defective electronic expansion valve coil. •Defective outdoor unit main PCB. |
•Refer to Expansion Valve Check 18. | x | System error | VRV IV | |||||||||||||||||||
| E9 | 34 | Electronic expansion valve (Y5E) error – Slave unit 1 | •Disconnection of connectors from
electronic expansion valves. •Defective electronic expansion valve coil. •Defective outdoor unit main PCB. |
•Refer to Expansion Valve Check 18. | x | System error | VRV IV | |||||||||||||||||||
| E9 | 37 | Electronic expansion valve (Y7E) error – Slave unit 1 | •Disconnection
of connectors from electronic expansion valves. •Defective electronic expansion valve coil. •Defective outdoor unit main PCB. |
•Refer to Expansion Valve Check 18. | x | System error | VRV IV | |||||||||||||||||||
| E9 | 39 | Electronic expansion valve (Y5E) error – Slave unit 2 | •Disconnection of connectors from
electronic expansion valves. •Defective electronic expansion valve coil. •Defective outdoor unit main PCB. |
•Refer to Expansion Valve Check 18. | x | System error | VRV IV | |||||||||||||||||||
| E9 | 42 | Electronic expansion valve (Y7E) error – Slave unit 2 | •Disconnection
of connectors from electronic expansion valves. •Defective electronic expansion valve coil. •Defective outdoor unit main PCB. |
•Refer to Expansion Valve Check 18. | x | System error | VRV IV | |||||||||||||||||||
| Not sure what four side valve is?[51] | this is four way valve | EA[52] | 0x3A | Cool/heat switch error or four side valve switch defect | •Defective
four way valve. •shortage of gas. •Defective outdoor unit PCB. •Connector in poor contact. •Thermistor defective. •Outdoor unit PCB defective. •Four way valve coil or harness defective. •Four way valve defective. •Foreign substance mixed in refrigerant. •Insufficient gas. |
•Refer to RA Check 1, 13,
14. •Refer to Altherma Check 5, 6, 11 |
x | System error | RA | EA | ||||||||||||||||
| What water is it referring to?[53] | entering water temperature. This is for VRV hot water supply unit, such as Mega-Q | EC[54] | 0x3C | Domestic hot water tank temperature too high (> 192°F/89°C) | •defective
thermistor. •Defective outdoor unit PCB. •Cooling water temp abnormality. •Shortage of gas. |
Refer to RA Check 1, 13, 14 | x | Sensor error | Altherma | EC | ||||||||||||||||
| What sensors is it referring to?[55] | malfunction of sensor system of compressor | H0[56] | 0x40 | Compressor system error | •Reactor disconnection. •Compressor disconnection. •Outdoor unit PCB defective. •Compressor defective. •Disconnection of reactor. •Disconnection of compressor harness. •Defective outdoor unit PCB. |
x | System error | Altherma split, RA | H0 | |||||||||||||||||
| H3[57] | 0x43 | High pressure switch error | •Incomplete
high pressure switch. •Disconnection in high pressure switch harness. •Faulty connection of high pressure switch connector. •Faulty compressor compartment PC board. •Disconnected lead wire. |
•Verify
electrical wiring. •Verify ODU PCB. •Verify high Pressure Switch. |
x | All models | minor | Pressure error | Altherma
MonoBloc, VRV II SkyAir, VRV) |
H3 | ||||||||||||||||
| H3[58] | 02 | Harness abnormality (Main &
inverter PCB) - Master unit |
•Defective connection of jumpers
between PCB. •Defective control PCB (A1P). •Defective inverter PCB. |
•Check compressor isulation resistance. Check Odu fan motor and inverter board. | x | System error | VRV IV | |||||||||||||||||||
| H3[59] | 03 | Connection error (Control & INV. 2 (A6P)) – Master unit | •Defective
connection of jumpers between PCB. •Defective control PCB (A1P). •Defective inverter PCB. |
•Check compressor isulation resistance. Check Odu fan motor and inverter board. | x | System error | VRV IV | |||||||||||||||||||
| H3[60] | 04 | Harness abnormality (Main &
inverter PCB) - Slave unit 1 |
•Defective connection of jumpers
between PCB. •Defective control PCB (A1P). •Defective inverter PCB. |
•Check compressor isulation resistance. Check Odu fan motor and inverter board. | x | System error | VRV IV | |||||||||||||||||||
| H3[61] | 05 | Connection error (Control & INV. 2 (A6P)) – Slave unit 1 | •Defective
connection of jumpers between PCB. •Defective control PCB (A1P). •Defective inverter PCB. |
•Check compressor isulation resistance. Check Odu fan motor and inverter board. | x | System error | VRV IV | |||||||||||||||||||
| H3[62] | 06 | Harness abnormality (Main &
inverter PCB) - Slave unit 2 |
•Defective connection of jumpers
between PCB. •Defective control PCB (A1P). •Defective inverter PCB. |
•Check compressor isulation resistance. Check Odu fan motor and inverter board. | x | System error | VRV IV | |||||||||||||||||||
| H3[63] | 07 | Connection error (Control & INV. 2 (A6P)) – Slave unit 2 | •Defective
connection of jumpers between PCB. •Defective control PCB (A1P). •Defective inverter PCB. |
•Check compressor isulation resistance. Check Odu fan motor and inverter board. | x | System error | VRV IV | |||||||||||||||||||
| H4[64] | 0x44 | Low pressure switch error | •Defective
low pressure switch. •Defective outdoor unit PCB. •Loose or broken wire. |
Verify
electrical wiring Verify ODU PCB Verify Low Pressure Switch |
x | Pressure error | VRV II | H4 | ||||||||||||||||||
| H5[65] | 0x45 | Compressor motor overload sensor error | •Defective
motor overload sensor. •Loose or broken wire. |
x | System error | H5 | ||||||||||||||||||||
| H6[66] | 0x46 | Position detection sensor error/Compressor Startup Failure | •Compressor
relay cable disconnected. •Compressor itself defective. •Outdoor unit PCB defective. •Stop valve closed. •Input voltage out of specification. •Power supply voltage is not as specified. •Disconnection of the compressor harness. |
•Refer
to Altherma Check 13. •Refer to RA Check 15, 18, 20. |
x | Sensor error | Altherma, RA | H6 | ||||||||||||||||||
| H7[67] | 0x47 | Outdoor unit fan failure error | •Short
in fan motor leads. •Abnormal signal from fan motor. •Loose or broken wires. •Defective outdoor unit PCB (A3P) |
•Check
for the connector of the fan motor.
•Check resistance between Vcc and UVW and between GND. •Check if UVW of the fan motor lead are in balance. |
x | REYQ-XATJU,REYQ-XAYDU | Fan failure error | Condensing
Unit (SkyAir, VRV III) |
H7 | |||||||||||||||||
| H7[68] | 01 | Motor position signal abnormality (Master): M1F | •Abnormal signal from fan motor
(Circuit failure). •Disconnection/Short circuit in fan motor leads or disconnection of connector. •Defective inverter PCB. |
•Refer to Fan Motor Check 17. | x | Fan failure error | VRV IV | |||||||||||||||||||
| H7[69] | 02 | Motor position signal abnormality (Master): M2F | •Abnormal
signal from fan motor (Circuit failure). •Disconnection/Short circuit in fan motor leads or disconnection of connector. •Defective inverter PCB. |
•Refer to Fan Motor Check 17. | x | Fan failure error | VRV IV | |||||||||||||||||||
| H7[70] | 05 | Motor position signal abnormality (Slave 1): M1F | •Abnormal signal from fan motor
(Circuit failure). •Disconnection/Short circuit in fan motor leads or disconnection of connector. •Defective inverter PCB. |
•Refer to Fan Motor Check 17. | x | Fan failure error | VRV IV | |||||||||||||||||||
| H7[71] | 06 | Motor position signal abnormality (Slave 1): M2F | •Abnormal
signal from fan motor (Circuit failure). •Disconnection/Short circuit in fan motor leads or disconnection of connector. •Defective inverter PCB. |
•Refer to Fan Motor Check 17. | x | Fan failure error | VRV IV | |||||||||||||||||||
| H7[72] | 09 | Fan motor 1 signal detection error – Slave unit 2 | •Abnormal signal from fan motor
(Circuit failure). •Disconnection/Short circuit in fan motor leads or disconnection of connector. •Defective inverter PCB. |
•Refer to Fan Motor Check 17. | x | Fan failure error | VRV IV | |||||||||||||||||||
| H7[73] | 10 | Fan motor 2 signal detection error – Slave unit 2 | •Abnormal
signal from fan motor (Circuit failure). •Disconnection/Short circuit in fan motor leads or disconnection of connector. •Defective inverter PCB. |
•Refer to Fan Motor Check 17. | x | Fan failure error | VRV IV | |||||||||||||||||||
| H7[74] | 21 | Defective fan PCB (Master): M1F | •Abnormal signal from fan motor
(Circuit failure). •Disconnection/Short circuit in fan motor leads or disconnection of connector. •Defective inverter PCB. |
•Refer to Fan Motor Check 17. | x | Fan failure error | VRV IV | |||||||||||||||||||
| H7[75] | 22 | Defective fan PCB (Master): M2F | •Abnormal
signal from fan motor (Circuit failure). •Disconnection/Short circuit in fan motor leads or disconnection of connector. •Defective inverter PCB. |
•Refer to Fan Motor Check 17. | x | Fan failure error | VRV IV | |||||||||||||||||||
| H7[76] | 23 | Defective fan PCB (Slave 1): M1F | •Abnormal signal from fan motor
(Circuit failure). •Disconnection/Short circuit in fan motor leads or disconnection of connector. •Defective inverter PCB. |
•Refer to Fan Motor Check 17. | x | Fan failure error | VRV IV | |||||||||||||||||||
| H7[77] | 24 | Defective fan PCB (Slave 1): M2F | •Abnormal
signal from fan motor (Circuit failure). •Disconnection/Short circuit in fan motor leads or disconnection of connector. •Defective inverter PCB. |
•Refer to Fan Motor Check 17. | x | Fan failure error | VRV IV | |||||||||||||||||||
| H7[78] | 25 | Defective fan PCB (Slave 2): M1F | •Abnormal signal from fan motor
(Circuit failure). •Disconnection/Short circuit in fan motor leads or disconnection of connector. •Defective inverter PCB. |
•Refer to Fan Motor Check 17. | x | Fan failure error | VRV IV | |||||||||||||||||||
| H7[79] | 26 | Defective fan PCB (Slave 2): M2F | •Abnormal
signal from fan motor (Circuit failure). •Disconnection/Short circuit in fan motor leads or disconnection of connector. •Defective inverter PCB. |
•Refer to Fan Motor Check 17. | x | Fan failure error | VRV IV | |||||||||||||||||||
| H8[80] | 0x48 | CT or Related Abnormality | •Malfunction of compressor input
(CT) system. •Defect of power transistor. •Faulty wiring of inverter system. •Reactor defective. •Defect of condensing unit PCB. |
Refer To RA Check 15, 21 | x | Sensor error | RA, Altherma split | H8 | ||||||||||||||||||
| H9[81] | 0x49 | Outdoor temperature sensor/P4, J3, J6, H9” Thermistor or Related Abnormality (Outdoor Unit) error | •Disconnection
of the connector for the thermistor. •Thermistor corresponding to the error code is defective. •Defective heat exchanger thermistor in the case of J3 error (outdoor heat exchanger thermistor. •In cooling operation, or indoor heat exchanger thermistor in heating operation). •Defective outdoor unit PCB. •Hydro-box PCB defective. •Connector in poor contact. |
•Refer
to RA Check 1. •Connector & Symbol varies per model. Refer to correct Service Manual. •Refer to Altherma Check 6. |
x | All models | Sensor error | RA, VRV, Skyair, Altherma | H9 | |||||||||||||||||
| H9[82] | H9[83] | H9[84] | 01 | Defective outdoor air thermistor – Master unit | •Defective connection of
thermistor. •Defective thermistor. •Defective outdoor unit PCB. |
•Refer to VRV IVX Thermister Check 11. | Sensor error | VRV IV | ||||||||||||||||||
| H9[85] | H9[86] | H9[87] | 02 | Defective outdoor air thermistor – Slave unit 1 | •Defective
connection of thermistor. •Defective thermistor. •Defective outdoor unit PCB. |
•Refer to VRV IVX Thermister Check 11. | Sensor error | VRV IV | ||||||||||||||||||
| H9[88] | H9[89] | H9[90] | 03 | Defective outdoor air thermistor – Slave unit 2 | •Defective connection of
thermistor. •Defective thermistor. •Defective outdoor unit PCB. |
•Refer to VRV IVX Thermister Check 11. | Sensor error | VRV IV | ||||||||||||||||||
| What water and oil is it referring to?[91] | water temperature of the heat exchanger(VRV4W) | HC[92] | 0x4C | Water
inlet thermistor (R9T) abnormality Water outlet thermistor (R10T) abnormality/Thermistor or Related Abnormality (Hydro-box). |
•Faulty
connector connection. •Faulty thermistor. •Faulty outdoor unit PCB. |
•Refer to Altherma Check 6. | x | Sensor error | Altherma/VRV-W | HC | ||||||||||||||||
| HC[93] | 03 | Defective water inlet thermistor (R9T) (Master) | •Defective connection of
thermistor. •Defective thermistor. •Defective outside unit PCB. |
•Water Cooled Thermistor Check 11. | x | Sensor error | VRV-W | |||||||||||||||||||
| HC[94] | 04 | Defective water inlet thermistor (R9T) (Slave 1) | •Defective
connection of thermistor. •Defective thermistor. •Defective outside unit PCB. |
•Water Cooled Thermistor Check 11. | x | Sensor error | VRV-W | |||||||||||||||||||
| HC[95] | 05 | Defective water inlet thermistor (R9T) (Slave 2) | •Defective connection of
thermistor. •Defective thermistor. •Defective outside unit PCB. |
•Water Cooled Thermistor Check 11. | x | Sensor error | VRV-W | |||||||||||||||||||
| HC[96] | 06 | Defective water outlet thermistor (R10T) (Master) | •Defective
connection of thermistor. •Defective thermistor. •Defective outside unit PCB. |
•Water Cooled Thermistor Check 11. | x | Sensor error | VRV-W | |||||||||||||||||||
| HC[97] | 07 | Defective water outlet thermistor (R10T) (Slave 1) | •Defective connection of
thermistor. •Defective thermistor. •Defective outside unit PCB. |
•Water Cooled Thermistor Check 11. | x | Sensor error | VRV-W | |||||||||||||||||||
| HC[98] | 08 | Defective water outlet thermistor (R10T) (Slave 2) | •Defective
connection of thermistor. •Defective thermistor. •Defective outside unit PCB. |
•Water Cooled Thermistor Check 11. | x | Sensor error | VRV-W | |||||||||||||||||||
| HJ[99] | 0x4D | Malfunction of water system | •Clogged water piping
system. •Insufficient heat exchanger water. •Dirty heat exchanger. •Disconnected connector. •Defective thermistor on the heat exchanger gas side. •Defective low pressure sensor. |
•Water Cooled Thermistor Check 11. | x | System error | VRV-W | HJ(D) | ||||||||||||||||||
| HJ[100] | 01 | Water system abnormality (Master) | •Clogged
water piping system. •Insufficient heat exchanger water. •Dirty heat exchanger. •Disconnected connector. •Defective thermistor on the heat exchanger gas side. •Defective low pressure sensor. |
•Water Cooled Thermistor Check 11. | System error | VRV-W | ||||||||||||||||||||
| HJ[101] | 02 | Water system abnormality (Slave 1) | •Clogged water piping
system. •Insufficient heat exchanger water. •Dirty heat exchanger. •Disconnected connector. •Defective thermistor on the heat exchanger gas side. •Defective low pressure sensor. |
•Water Cooled Thermistor Check 11. | System error | VRV-W | ||||||||||||||||||||
| HJ[102] | 03 | Water system abnormality (Slave 2) | •Clogged
water piping system. •Insufficient heat exchanger water. •Dirty heat exchanger. •Disconnected connector. •Defective thermistor on the heat exchanger gas side. •Defective low pressure sensor. |
•Water Cooled Thermistor Check 11. | System error | VRV-W | ||||||||||||||||||||
| HJ[103] | 04 | Water system abnormality (System) | •Clogged water piping
system. •Insufficient heat exchanger water. •Dirty heat exchanger. •Disconnected connector. •Defective thermistor on the heat exchanger gas side. •Defective low pressure sensor. |
•Water Cooled Thermistor Check 11. | System error | VRV-W | ||||||||||||||||||||
| HJ[104] | 05 | Abnormality
by the temperature rise of the liquid refrigerant |
•Clogged
water piping system. •Insufficient heat exchanger water. •Dirty heat exchanger. •Disconnected connector. •Defective thermistor on the heat exchanger gas side. •Defective low pressure sensor. |
•Water Cooled Thermistor Check 11. | System error | VRV-W | ||||||||||||||||||||
| Is this error in conjunction with F1&F2?[105] | F0 F1 F2 reserved for future use | F0[106] | 0x50 | No.1, No.2 system common protection device activation | x | Safety error | F0 | |||||||||||||||||||
| F1[107] | 0x51 | No.1 system protection device activation | x | Safety error | F1 | |||||||||||||||||||||
| F2[108] | 0x52 | No.2 system protection device activation | x | Safety error | F2 | |||||||||||||||||||||
| F3[109] | 0x53 | Discharge pipe temp error | •Abnormal
discharge pipe temperature. •Abnormal compressor surface temperature. •Defective discharge pipe thermistor. •Defective compressor body thermistor. •Defective outdoor unit main PCB. |
x | All models | Sensor error | F3 | |||||||||||||||||||
| F4[110] | 0x54 | Compressor suction temp error | •Defective
suction pipe thermistor. •Defective compressor suction thermistor. •Defective discharge pipe thermistor. •Defective high pressure sensor. •Defective indoor unit electronic expansion valve. •Dirty air filter. |
x | All models | System error | F4 | |||||||||||||||||||
| F6[111] | 0x56 | Refrigerant overcharged | •Refrigerant
overcharge. •Outdoor air thermistor disconnected. •Heat exchanger deicer thermistor disconnected. •Liquid pipe temperature thermistor disconnected. |
x | All models | Pressure error | F6 | |||||||||||||||||||
| F9 | 0x59 | Expansion valve branch selector error | •Expansion
valve connector disconnected. •Defective expansion valve coil. •Defective branch selector PCB. |
x | Branch selector unit | System error | ||||||||||||||||||||
| FA[112] | 0x5A | Discharge pressure error | x | Sensor error | FA | |||||||||||||||||||||
| FH[113] | 0x5B | High oil temp error | x | Sensor error | FH(B) | |||||||||||||||||||||
| FC[114] | 0x5C | Suction pressure error | x | Sensor error | FC | |||||||||||||||||||||
| FJ[115] | 0x5D | Engine exhaust gas temp error | x | Pressure error | FJ(D) | |||||||||||||||||||||
| FE[116] | 0x5E | Hydraulic pressure error | x | Pressure error | FE | |||||||||||||||||||||
| FF[117] | 0x5F | Oil pressure error or compressor out of oil | x | Pressure error | FF | |||||||||||||||||||||
| J0[118] | 0x60 | Refrigerant temp sensor error | x | Sensor error | J0 | |||||||||||||||||||||
| J1[119] | 0x61 | Pressure sensor error | •Faulty
pressure sensor. •Faulty compressor compartment PC board. •Incorrect connection of connector. |
x | Sensor error | Altherma MonoBloc | J1 | |||||||||||||||||||
| J2[120] | 0x62 | Current sensor error | •Defective
current sensor. •Defective outdoor unit PCB. •Defective compressor. |
x | Sensor error | VRV II & III | J2 | |||||||||||||||||||
| J3[121] | 0x63 | Discharge pipe temp sensor error | •Defective
thermistor (R3T, R31T, R32T) for outdoor unit discharge pipe. •Defective outdoor unit PCB (A1P). •Defective thermistor connection. •Condenser thermistor defective in the case of J3 error (outdoor unit heat exchanger thermistor in the cooling mode, or hydro-box heat exchanger thermistor in the heating mode). |
•Refer to RA Check 1. •Refer to Altherma Check 6. •Refer to VRV III Thermistor Check. |
x | All models | Sensor error | RA, Altherma, VRV, Skyair, VRV III | J3 | |||||||||||||||||
| J3[122] | 16 | Defective discharge pipe 1 thermistor: Open – Master unit | •Defective
connection of thermistor. •Defective thermistor. •Defective outdoor unit PCB. |
•Refer to VRV IVX Thermister Check 11. | x | Sensor error | VRV IV | |||||||||||||||||||
| J3[123] | 17 | Defective discharge pipe 1 thermistor: Short – Master unit | •Defective connection of
thermistor. •Defective thermistor. •Defective outdoor unit PCB. |
•Refer to VRV IVX Thermister Check 11. | x | Sensor error | VRV IV | |||||||||||||||||||
| J3[124] | 22 | Defective discharge pipe 1 thermistor: Open – Slave unit 1 | •Defective
connection of thermistor. •Defective thermistor. •Defective outdoor unit PCB. |
•Refer to VRV IVX Thermister Check 11. | x | Sensor error | VRV IV | |||||||||||||||||||
| J3[125] | 23 | Defective discharge pipe 1 thermistor: Short – Slave unit 1 | •Defective connection of
thermistor. •Defective thermistor. •Defective outdoor unit PCB. |
•Refer to VRV IVX Thermister Check 11. | x | Sensor error | VRV IV | |||||||||||||||||||
| J3[126] | 28 | Defective discharge pipe 1 thermistor: Open – Slave unit 2 | •Defective
connection of thermistor. •Defective thermistor. •Defective outdoor unit PCB. |
•Refer to VRV IVX Thermister Check 11. | x | Sensor error | VRV IV | |||||||||||||||||||
| J3[127] | 29 | Defective discharge pipe 1 thermistor: Short – Slave unit 2 | •Defective connection of
thermistor. •Defective thermistor. •Defective outdoor unit PCB. |
•Refer to VRV IVX Thermister Check 11. | x | Sensor error | VRV IV | |||||||||||||||||||
| J3[128] | 47 | Defective compressor surface thermistor: Open – Master unit | •Defective
connection of thermistor. •Defective thermistor. •Defective outdoor unit PCB. |
•Refer to VRV IVX Thermister Check 11. | x | Sensor error | VRV IV | |||||||||||||||||||
| J3[129] | 48 | Defective compressor surface thermistor: Short – Master unit | •Defective connection of
thermistor. •Defective thermistor. •Defective outdoor unit PCB. |
•Refer to VRV IVX Thermister Check 11. | x | Sensor error | VRV IV | |||||||||||||||||||
| J3[130] | 49 | Defective compressor surface thermistor: Open – Slave unit 1 | •Defective
connection of thermistor. •Defective thermistor. •Defective outdoor unit PCB. |
•Refer to VRV IVX Thermister Check 11. | x | Sensor error | VRV IV | |||||||||||||||||||
| J3[131] | 50 | Defective compressor surface thermistor: Short – Slave unit 1 | •Defective connection of
thermistor. •Defective thermistor. •Defective outdoor unit PCB. |
•Refer to VRV IVX Thermister Check 11. | x | Sensor error | VRV IV | |||||||||||||||||||
| J3[132] | 51 | Defective compressor surface thermistor: Open – Slave unit 2 | •Defective
connection of thermistor. •Defective thermistor. •Defective outdoor unit PCB. |
•Refer to VRV IVX Thermister Check 11. | x | Sensor error | VRV IV | |||||||||||||||||||
| J3[133] | 52 | Defective compressor surface thermistor: Short – Slave unit 2 | •Defective connection of
thermistor. •Defective thermistor. •Defective outdoor unit PCB. |
•Refer to VRV IVX Thermister Check 11. | x | Sensor error | VRV IV | |||||||||||||||||||
| J3[134] | 56 | Discharge pipe warning – Master unit | •Defective
connection of thermistor. •Defective thermistor. •Defective outdoor unit PCB. |
•Refer to VRV IVX Thermister Check 11. | x | Sensor error | VRV IV | |||||||||||||||||||
| J3[135] | 57 | Discharge pipe warning – Slave unit 1 | •Defective connection of
thermistor. •Defective thermistor. •Defective outdoor unit PCB. |
•Refer to VRV IVX Thermister Check 11. | x | Sensor error | VRV IV | |||||||||||||||||||
| J3[136] | 58 | Discharge pipe warning – Slave unit 2 | •Defective
connection of thermistor. •Defective thermistor. •Defective outdoor unit PCB. |
•Refer to VRV IVX Thermister Check 11. | x | Sensor error | VRV IV | |||||||||||||||||||
| J4[137] | 0x64 | Outdoor Unit: Malfunction of Temperature Sensor for Heat Exchanger Gas (R2T or R11T) | •Defective connection of
thermistor. •Defective thermistor. •Defective outdoor unit PCB. |
•VRV III Thermistor Check Final. | x | Sensor error | Condensing Unit (VRV III) | J4 | ||||||||||||||||||
| J4[138] | 02 | Defective
plate heat exchanger gas thermistor (R4T) (Master) |
•Defective
connection of thermistor. •Defective thermistor. •Defective outdoor unit PCB. |
•Water Cooled Thermistor Check 11. | Sensor error | VRV IV | ||||||||||||||||||||
| J4[139] | 04 | Defective plate heat exchanger gas
thermistor (R4T) (Slave 1) |
•Defective connection of
thermistor. •Defective thermistor. •Defective outdoor unit PCB. |
•Water Cooled Thermistor Check 11. | Sensor error | VRV IV | ||||||||||||||||||||
| J4[140] | 06 | Defective
plate heat exchanger gas thermistor (R4T) (Slave 2) |
•Defective
connection of thermistor. •Defective thermistor. •Defective outdoor unit PCB. |
•Water Cooled Thermistor Check 11. | Sensor error | VRV IV | ||||||||||||||||||||
| J5[141] | 0x65 | Suction pipe temp sensor/H9, J3, J5, J6, J7, J8” Thermistor or Related Abnormality (Outdoor Unit) error | •Defective
thermistor. •Defective main outdoor PCB. •Loose or broken wire. • Defective thermistor (R8T or R10T) for outdoor unit suction pipe. |
•Refer to Altherma Check 3, 4, 5. | x | All models | Sensor error | Altherma MonoBloc, Condensing Unit (RA, SkyAir, VRV III) | J5 | |||||||||||||||||
| J5[142] | 01 | Defective
compressor suction thermistor (R12T) (Master) |
•Defective
connection of thermistor. •Defective thermistor. •Defective outdoor unit PCB. |
•Refer to VRV IVX Thermister Check 11. | x | Sensor error | VRV IV | |||||||||||||||||||
| J5[143] | 03 | Defective compressor suction
thermistor (R12T) (Slave 1) |
•Defective connection of
thermistor. •Defective thermistor. •Defective outdoor unit PCB. |
•Refer to VRV IVX Thermister Check 11. | x | Sensor error | VRV IV | |||||||||||||||||||
| J5[144] | 05 | Defective
compressor suction thermistor (R12T) (Slave 2) |
•Defective
connection of thermistor. •Defective thermistor. •Defective outdoor unit PCB. |
•Refer to VRV IVX Thermister Check 11. | x | Sensor error | VRV IV | |||||||||||||||||||
| J5[145] | 18 | Error detection of suction pipe thermistor (R10T) (Master) | •Defective connection of
thermistor. •Defective thermistor. •Defective outdoor unit PCB. |
•Refer to VRV IVX Thermister Check 11. | x | Sensor error | VRV IV | |||||||||||||||||||
| J5[146] | 19 | Error detection of suction pipe thermistor (R10T) (Slave 1) | •Defective
connection of thermistor. •Defective thermistor. •Defective outdoor unit PCB. |
•Refer to VRV IVX Thermister Check 11. | x | Sensor error | VRV IV | |||||||||||||||||||
| J5[147] | 20 | Error detection of suction pipe thermistor (R10T) (Slave 2) | •Defective connection of
thermistor. •Defective thermistor. •Defective outdoor unit PCB. |
•Refer to VRV IVX Thermister Check 11. | x | Sensor error | VRV IV | |||||||||||||||||||
| J6[148] | 0x66 | Heat exchanger gas pipe temp sensor/P4, J3, J6, H9” Thermistor or Related Abnormality (Outdoor Unit) error | •Connector
in poor contact. •Thermistor defective. •Outdoor unit PCB defective. •Hydro-box PCB defective. •Condenser thermistor defective in the case of J3 error (outdoor unit heat exchanger thermistor in the cooling mode, or hydro-box heat exchanger thermistor in the heating mode). |
•Refer
to Altherma Check 6. •Refer to RA Check 1. •Refer to VRV III Thermistor Check. |
x | All models | Sensor error | Altherma, RA, VRV, Skyair, VRV, Skyair | J6 | |||||||||||||||||
| J6[149] | 01 | Defective heat exchanger deicer
thermistor – Master unit/Defective plate heat exchanger liquid
thermistor (R7T) (Master) |
•Defective connection of
thermistor. •Defective thermistor. •Defective outdoor unit PCB. |
•Refer to VRV IVX Thermister Check
11. •Water Cooled Thermistor Check 11. |
x | Sensor error | VRV IV, VRVW IV | |||||||||||||||||||
| J6[150] | 02 | Defective
heat exchanger deicer thermistor – Slave unit 1/Defective plate heat
exchanger liquid thermistor (R7T) (Slave 1) |
•Defective
connection of thermistor. •Defective thermistor. •Defective outdoor unit PCB. |
•Refer
to VRV IVX Thermister Check 11. •Water Cooled Thermistor Check 11. |
x | Sensor error | VRV IV, VRVW IV | |||||||||||||||||||
| J6[151] | 03 | Defective heat exchanger deicer
thermistor – Slave unit 2/Defective plate heat exchanger liquid
thermistor (R7T) (Slave 2) |
•Defective connection of
thermistor. •Defective thermistor. •Defective outdoor unit PCB. |
•Refer to VRV IVX Thermister Check
11. •Water Cooled Thermistor Check 11. |
x | Sensor error | VRV IV, VRVW IV | |||||||||||||||||||
| J6[152] | 08 | Defective heat exchanger gas upper thermistor (Master) | •Defective
connection of thermistor. •Defective thermistor. •Defective outdoor unit PCB. |
•Refer to VRV IVX Thermister Check 11. | x | Sensor error | VRV IV | |||||||||||||||||||
| J6[153] | 09 | Defective heat exchanger gas upper thermistor (Slave 1) | •Defective connection of
thermistor. •Defective thermistor. •Defective outdoor unit PCB. |
•Refer to VRV IVX Thermister Check 11. | x | Sensor error | VRV IV | |||||||||||||||||||
| J6[154] | 10 | Defective heat exchanger gas upper thermistor (Slave 2) | •Defective
connection of thermistor. •Defective thermistor. •Defective outdoor unit PCB. |
•Refer to VRV IVX Thermister Check 11. | x | Sensor error | VRV IV | |||||||||||||||||||
| J6[155] | 11 | Defective heat exchanger gas lower thermistor (Master) | •Defective connection of
thermistor. •Defective thermistor. •Defective outdoor unit PCB. |
•Refer to VRV IVX Thermister Check 11. | x | Sensor error | VRV IV | |||||||||||||||||||
| J6[156] | 12 | Defective heat exchanger gas lower thermistor (Slave 1) | •Defective
connection of thermistor. •Defective thermistor. •Defective outdoor unit PCB. |
•Refer to VRV IVX Thermister Check 11. | x | Sensor error | VRV IV | |||||||||||||||||||
| J6[157] | 13 | Defective heat exchanger gas lower thermistor (Slave 2) | •Defective connection of
thermistor. •Defective thermistor. •Defective outdoor unit PCB. |
•Refer to VRV IVX Thermister Check 11. | x | Sensor error | VRV IV | |||||||||||||||||||
| J6[158] | 14 | Error detection of heat exchanger gas upper thermistor (Master) | •Defective
connection of thermistor. •Defective thermistor. •Defective outdoor unit PCB. |
•Refer to VRV IVX Thermister Check 11. | x | Sensor error | VRV IV | |||||||||||||||||||
| J6[159] | 16 | Error detection of heat exchanger gas upper thermistor (Slave 1) | •Defective connection of
thermistor. •Defective thermistor. •Defective outdoor unit PCB. |
•Refer to VRV IVX Thermister Check 11. | x | Sensor error | VRV IV | |||||||||||||||||||
| J6[160] | 17 | Error detection of heat exchanger gas upper thermistor (Slave 2) | •Defective
connection of thermistor. •Defective thermistor. •Defective outdoor unit PCB. |
•Refer to VRV IVX Thermister Check 11. | x | Sensor error | VRV IV | |||||||||||||||||||
| J6[161] | 18 | Error detection of heat exchanger gas lower thermistor (Master) | •Defective connection of
thermistor. •Defective thermistor. •Defective outdoor unit PCB. |
•Refer to VRV IVX Thermister Check 11. | x | Sensor error | VRV IV | |||||||||||||||||||
| J6[162] | 19 | Error detection of heat exchanger gas lower thermistor (Slave 1) | •Defective
connection of thermistor. •Defective thermistor. •Defective outdoor unit PCB. |
•Refer to VRV IVX Thermister Check 11. | x | Sensor error | VRV IV | |||||||||||||||||||
| J7[163] | 0x67 | Subcooling heat exchanger liquid temp sensor/H9, J3, J5, J6, J7, J8” Thermistor or Related Abnormality (Outdoor Unit) error | •Defective
thermistor. •Defective main outdoor PCB. •Loose or broken wire. •Faulty compressor compartment PC board (control PC board). |
•Refer to VRV III Thermistor
Check. •Refer to Altherma Check 3, 4, 5 |
x | All models | Sensor error | Condensing Unit (SkyAir, VRV III), Altherma MonoBloc |
J7 | |||||||||||||||||
| J7[164] | 01 | Defective
receiver inlet thermistor (Master) |
•Defective
connection of thermistor. •Defective thermistor. •Defective outdoor unit PCB. |
•Refer to VRV IVX Thermister Check 11. | x | Sensor error | VRV IV | |||||||||||||||||||
| J7[165] | 02 | Defective receiver inlet
thermistor (Slave 1) |
•Defective connection of
thermistor. •Defective thermistor. •Defective outdoor unit PCB. |
•Refer to VRV IVX Thermister Check 11. | x | Sensor error | VRV IV | |||||||||||||||||||
| J7[166] | 03 | Defective
receiver inlet thermistor (Slave 2) |
•Defective
connection of thermistor. •Defective thermistor. •Defective outdoor unit PCB. |
•Refer to VRV IVX Thermister Check 11. | x | Sensor error | VRV IV | |||||||||||||||||||
| J7[167] | 06 | Defective subcooling liquid pipe thermistor – Master unit | •Defective connection of
thermistor. •Defective thermistor. •Defective outdoor unit PCB. |
•Refer to VRV IVX Thermister Check 11. | x | Sensor error | VRV IV | |||||||||||||||||||
| J7[168] | 07 | Defective subcooling liquid pipe thermistor – Slave unit 1 | •Defective
connection of thermistor. •Defective thermistor. •Defective outdoor unit PCB. |
•Refer to VRV IVX Thermister Check 11. | x | Sensor error | VRV IV | |||||||||||||||||||
| J7[169] | 08 | Defective subcooling liquid pipe thermistor – Slave unit 2 | •Defective connection of
thermistor. •Defective thermistor. •Defective outdoor unit PCB. |
•Refer to VRV IVX Thermister Check 11. | x | Sensor error | VRV IV | |||||||||||||||||||
| J7[170] | 17 | Standby for preventing fusible plug removal | •Defective
connection of thermistor. •Defective thermistor. •Defective outdoor unit PCB. |
•Refer to VRV IVX Thermister Check 11. | x | Sensor error | VRV IV | |||||||||||||||||||
| J7[171] | 18 | Defective subcooling injection
thermistor (Master) |
•Defective connection of
thermistor. •Defective thermistor. •Defective outdoor unit PCB. |
•Refer to VRV IVX Thermister Check 11. | x | Sensor error | VRV IV | |||||||||||||||||||
| J7[172] | 19 | Defective
subcooling injection thermistor (Slave 1) |
•Defective
connection of thermistor. •Defective thermistor. •Defective outdoor unit PCB. |
•Refer to VRV IVX Thermister Check 11. | x | Sensor error | VRV IV | |||||||||||||||||||
| J7[173] | 20 | Defective subcooling injection
thermistor (Slave 2) |
•Defective connection of
thermistor. •Defective thermistor. •Defective outdoor unit PCB. |
•Refer to VRV IVX Thermister Check 11. | x | Sensor error | VRV IV | |||||||||||||||||||
| J8[174] | 0x68 | Heat exchanger liquid pipe temp sensor/H9, J3, J5, J6, J7, J8” Thermistor or Related Abnormality (Outdoor Unit) error | •Disconnection
of the connector for the thermistor. •Thermistor corresponding to the error code is defective. •Defective heat exchanger thermistor in the case of J3 error (outdoor heat exchanger thermistor in cooling operation, or indoor heat exchanger thermistor in heating operation). •Defective outdoor unit PCB. •Faulty compressor compartment PC board (control PC board). |
•Refer
to RA Check 1. •Refer to Altherma Check 3, 4, 5. |
x | All models | Sensor error | RA, Altherma MonoBloc | J8 | |||||||||||||||||
| J8[175] | 01 | Defective heat exchanger liquid
upper thermistor (R4T) (Master) |
•Defective connection of
thermistor. •Defective thermistor. •Defective outdoor unit PCB. |
•Refer to VRV IVX Thermister Check 11. | x | Sensor error | VRV IV | |||||||||||||||||||
| J8[176] | 02 | Defective heat exchanger liquid pipe thermistor (R4T) – Slave unit 1 | •Defective
connection of thermistor. •Defective thermistor. •Defective outdoor unit PCB. |
•Refer to VRV IVX Thermister Check 11. | x | Sensor error | VRV IV | |||||||||||||||||||
| J8[177] | 03 | Defective heat exchanger liquid pipe thermistor (R4T) – Slave unit 2 | •Defective connection of
thermistor. •Defective thermistor. •Defective outdoor unit PCB. |
•Refer to VRV IVX Thermister Check 11. | x | Sensor error | VRV IV | |||||||||||||||||||
| J8[178] | 08 | Defective
heat exchanger liquid lower thermistor (R5T) (Master) |
•Defective
connection of thermistor. •Defective thermistor. •Defective outdoor unit PCB. |
•Refer to VRV IVX Thermister Check 11. | x | Sensor error | VRV IV | |||||||||||||||||||
| J8[179] | 09 | Defective heat exchanger liquid
lower thermistor (R5T) (Slave 1) |
•Defective connection of
thermistor. •Defective thermistor. •Defective outdoor unit PCB. |
•Refer to VRV IVX Thermister Check 11. | x | Sensor error | VRV IV | |||||||||||||||||||
| J8[180] | 10 | Defective
heat exchanger liquid lower thermistor (R5T) (Slave 2) |
•Defective
connection of thermistor. •Defective thermistor. •Defective outdoor unit PCB. |
•Refer to VRV IVX Thermister Check 11. | x | Sensor error | VRV IV | |||||||||||||||||||
| J9[181] | 0x69 | Gas pipe purge temp sensor error | •Defective
thermistor. •Defective main outdoor PCB. •Loose or broken wire. •Disconnection of the connector for the thermistor. •Thermistor corresponding to the error code is defective. •Defective heat exchanger thermistor in the case of J3 error (outdoor heat exchanger thermistor in cooling operation, or indoor heat exchanger thermistor in heating operation). |
•Refer to RA Check 1. •Use mode 1-52 to staart and compare.Ohm out sensor and compare to service manual chart.Use temperature probe thermister to compare as well.See flow chart in service manual. |
x | All models | Sensor error | RA, VRV, Skyair | J9 | |||||||||||||||||
| J9[182] | 01 | Defective
subcooling heat exchanger gas pipe thermistor (R6T) (Master) |
•Defective
connection of thermistor. •Defective thermistor. •Defective outdoor unit PCB. |
•Refer to VRV IVX Thermister Check 11. | x | Sensor error | VRV IV | |||||||||||||||||||
| J9[183] | 02 | Defective subcooling heat
exchanger gas pipe thermistor (R6T) (Slave 1) |
•Defective connection of
thermistor. •Defective thermistor. •Defective outdoor unit PCB. |
•Refer to VRV IVX Thermister Check 11. | x | Sensor error | VRV IV | |||||||||||||||||||
| J9[184] | 03 | Defective
subcooling heat exchanger gas pipe thermistor (R6T) (Slave 2) |
•Defective
connection of thermistor. •Defective thermistor. •Defective outdoor unit PCB. |
•Refer to VRV IVX Thermister Check 11. | x | Sensor error | VRV IV | |||||||||||||||||||
| J9[185] | 08 | Error detection - Failure of sub-cool heat exchanger outlet thermistor – Master Unit | •Defective connection of
thermistor. •Defective thermistor. •Defective outdoor unit PCB. |
•Refer to VRV IVX Thermister Check 11. | x | Sensor error | VRV IV | |||||||||||||||||||
| J9[186] | 09 | Error detection - Failure of sub-cool heat exchanger outlet thermistor – Slave 1 Unit | •Defective
connection of thermistor. •Defective thermistor. •Defective outdoor unit PCB. |
•Refer to VRV IVX Thermister Check 11. | x | Sensor error | VRV IV | |||||||||||||||||||
| J9[187] | 10 | Error detection - Failure of sub-cool heat exchanger outlet thermistor – Slave 2 Unit | •Defective connection of
thermistor. •Defective thermistor. •Defective outdoor unit PCB. |
•Refer to VRV IVX Thermister Check 11. | x | Sensor error | VRV IV | |||||||||||||||||||
| J9[188] | 11 | Receiver gas purge thermistor (R13T) (Master) | •Defective
connection of thermistor. •Defective thermistor. •Defective outdoor unit PCB. |
•Refer to VRV IVX Thermister Check 11. | x | Sensor error | VRV IV | |||||||||||||||||||
| J9[189] | 12 | Receiver gas purge thermistor (R13T) (Slave 1) | •Defective connection of
thermistor. •Defective thermistor. •Defective outdoor unit PCB. |
•Refer to VRV IVX Thermister Check 11. | x | Sensor error | VRV IV | |||||||||||||||||||
| J9[190] | 13 | Receiver gas purge thermistor (R13T) (Slave 2) | •Defective
connection of thermistor. •Defective thermistor. •Defective outdoor unit PCB. |
•Refer to VRV IVX Thermister Check 11. | x | Sensor error | VRV IV | |||||||||||||||||||
| JA[191] | 0x6A | High pressure sensor error | •Defective
high pressure switch. •Defective outdoor unit main PCB. •Defective high pressure sensor connection. •Misconnection between low and high pressure sensors. |
•Refer to Pressure Sensor Check 12. | x | All models | Pressure error | Condensing Unit (SkyAir, VRV III) |
JA | |||||||||||||||||
| JA[192] | 06 | Defective
high pressure sensor (S1NPH): Open (Master) |
•Defective
high pressure sensor. •Connection of low pressure sensor in mistake for high pressure sensor. •Defective outdoor unit PCB. •Defective connection of high pressure sensor. |
•Refer to Pressure Sensor Check 12. | x | Pressure error | VRV IV | |||||||||||||||||||
| JA[193] | 07 | Defective high pressure sensor
(S1NPH): Short (Master) |
•Defective high pressure
sensor. •Connection of low pressure sensor in mistake for high pressure sensor. •Defective outdoor unit PCB. •Defective connection of high pressure sensor. |
•Refer to Pressure Sensor Check 12. | x | Pressure error | VRV IV | |||||||||||||||||||
| JA[194] | 08 | Defective
high pressure sensor (S1NPH): Open (Slave 1) |
•Defective
high pressure sensor. •Connection of low pressure sensor in mistake for high pressure sensor. •Defective outdoor unit PCB. •Defective connection of high pressure sensor. |
•Refer to Pressure Sensor Check 12. | x | Pressure error | VRV IV | |||||||||||||||||||
| JA[195] | 09 | Defective high pressure sensor
(S1NPH): Short (Slave 1) |
•Defective high pressure
sensor. •Connection of low pressure sensor in mistake for high pressure sensor. •Defective outdoor unit PCB. •Defective connection of high pressure sensor. |
•Refer to Pressure Sensor Check 12. | x | Pressure error | VRV IV | |||||||||||||||||||
| JA[196] | 10 | Defective
high pressure sensor (S1NPH): Open (Slave 2) |
•Defective
high pressure sensor. •Connection of low pressure sensor in mistake for high pressure sensor. •Defective outdoor unit PCB. •Defective connection of high pressure sensor. |
•Refer to Pressure Sensor Check 12. | x | Pressure error | VRV IV | |||||||||||||||||||
| JA[197] | 11 | Defective high pressure sensor
(S1NPH): Short (Slave 2) |
•Defective high pressure
sensor. •Connection of low pressure sensor in mistake for high pressure sensor. •Defective outdoor unit PCB. •Defective connection of high pressure sensor. |
•Refer to Pressure Sensor Check 12. | x | Pressure error | VRV IV | |||||||||||||||||||
| JH[198] | 0x6B | Oil temp sensor error | x | Sensor error | JH(B) | |||||||||||||||||||||
| JC[199] | 0x6C | Low pressure sensor error | •Defective
low pressure switch. •Defective outdoor unit main PCB. •Defective high pressure sensor connection. •Misconnection between low and high pressure sensors. |
•Refer to Pressure Sensor Check 12. | x | All models | Pressure error | Condensing Unit (SkyAir, VRV III) |
JC | |||||||||||||||||
| JC[200] | 06 | Defective low pressure sensor: Open – Master unit | •Defective
low pressure sensor. •Connection of high pressure sensor in mistake for low pressure sensor. •Defective outdoor unit PCB. •Defective connection of low pressure sensor. |
•In recovery mode with service checker connected and analog gauge on service port compare gauge pressure to service checker reporting pressure furmore make voltage comparison using checks 12 and 14 in service manual. | x | Pressure error | VRV IV | |||||||||||||||||||
| JC[201] | 07 | Low pressure sensor abnormality. Short – Master unit | •Defective low pressure
sensor. •Connection of high pressure sensor in mistake for low pressure sensor. •Defective outdoor unit PCB. •Defective connection of low pressure sensor. |
•In recovery mode with service checker connected and analog gauge on service port compare gauge pressure to service checker reporting pressure furmore make voltage comparison using checks 12 and 14 in service manual. | x | Pressure error | VRV IV | |||||||||||||||||||
| JC[202] | 08 | Low pressure sensor abnormality. Open – Slave unit 1 | •Defective
low pressure sensor. •Connection of high pressure sensor in mistake for low pressure sensor. •Defective outdoor unit PCB. •Defective connection of low pressure sensor. |
•In recovery mode with service checker connected and analog gauge on service port compare gauge pressure to service checker reporting pressure furmore make voltage comparison using checks 12 and 14 in service manual. | x | Pressure error | VRV IV | |||||||||||||||||||
| JC[203] | 09 | Low pressure sensor abnormality. Short – Slave unit 1 | •Defective low pressure
sensor. •Connection of high pressure sensor in mistake for low pressure sensor. •Defective outdoor unit PCB. •Defective connection of low pressure sensor. |
•In recovery mode with service checker connected and analog gauge on service port compare gauge pressure to service checker reporting pressure furmore make voltage comparison using checks 12 and 14 in service manual. | x | Pressure error | VRV IV | |||||||||||||||||||
| JC[204] | 10 | Low pressure sensor abnormality. Open – Slave unit 2 | •Defective
low pressure sensor. •Connection of high pressure sensor in mistake for low pressure sensor. •Defective outdoor unit PCB. •Defective connection of low pressure sensor. |
•In recovery mode with service checker connected and analog gauge on service port compare gauge pressure to service checker reporting pressure furmore make voltage comparison using checks 12 and 14 in service manual. | x | Pressure error | VRV IV | |||||||||||||||||||
| JC[205] | 11 | Low pressure sensor abnormality. Short – Slave unit 2 | •Defective low pressure
sensor. •Connection of high pressure sensor in mistake for low pressure sensor. •Defective outdoor unit PCB. •Defective connection of low pressure sensor. |
•In recovery mode with service checker connected and analog gauge on service port compare gauge pressure to service checker reporting pressure furmore make voltage comparison using checks 12 and 14 in service manual. | x | Pressure error | VRV IV | |||||||||||||||||||
| JJ[206] | 0x6D | Engine room temp error, or engine exhaust gas temp sensor disconnected | x | Sensor error | JJ(D) | |||||||||||||||||||||
| JE[207] | 0x6E | Hydraulic pressure sensor error | x | Sensor error | JE | |||||||||||||||||||||
| JF[208] | 0x6F | Oil level sensor error | x | Sensor error | JF | |||||||||||||||||||||
| What error is this referring to?[209] | malfunction of inverter system, such as shortage of power supply capacity, defective power transistor, anor defective outdoor unit PCB | L0[210] | 0x70 | Malfunction of inverter system-VRV II obsolete unit | •Malfunction of inverter
system. •Shortage of power supply capacity. •Defect of inverter PCB. •Defect of power transistor. |
•Unit would be the VRV II -Inverter compressor or the R! resistor across the contactor 81- Per the Daikin service application. | x | System error | Condensing Unit (VRV) | L0 | ||||||||||||||||
| L1[211] | 0x71 | Faulty Compressor Compartment PC Board/Malfunction of inverter PCB | •Faulty
compressor compartment PC board (A1P). •IPM failure. •Current sensor failure. •MP-PAM failure. •Failure of IGBT or drive circuit. |
•Refer to Altherma Check 9. | x | REYQ-T | System error | Condensing Unit (SkyAir,VRV), Altherma MonoBloc | L1 | |||||||||||||||||
| L1[212] | 01 | IPM error: Compressor M1C (Master) | •Inverter PCB. •IPM failure. •Current sensor failure. •Drive circuit failure. |
•Refer to Power Transistor Check 4. | x | System error | VRV IV | |||||||||||||||||||
| L1[213] | 02 | Defective
current sensor 1: Compressor M1C (Master) |
•Inverter
PCB. •IPM failure. •Current sensor failure. •Drive circuit failure. |
•Refer to Power Transistor Check 4. | x | System error | VRV IV | |||||||||||||||||||
| L1[214] | 03 | Defective current sensor 2:
Compressor M1C (Master) |
•Inverter PCB. •IPM failure. •Current sensor failure. •Drive circuit failure. |
•Refer to Power Transistor Check 4. | x | System error | VRV IV | |||||||||||||||||||
| L1[215] | 04 | IGBT error: Compressor M1C (Master) | •Inverter
PCB. •IPM failure. •Current sensor failure. •Drive circuit failure. |
•Refer to Power Transistor Check 4. | x | System error | VRV IV | |||||||||||||||||||
| L1[216] | 05 | Jumper settings Inverter - Inverter compressor 1 – Master unit | •Inverter PCB. •IPM failure. •Current sensor failure. •Drive circuit failure. |
•Refer to Power Transistor Check 4. | x | System error | VRV IV | |||||||||||||||||||
| L1[217] | 07 | IPM error: Compressor M1C (Slave 1) | •Inverter
PCB. •IPM failure. •Current sensor failure. •Drive circuit failure. |
•Refer to Power Transistor Check 4. | x | System error | VRV IV | |||||||||||||||||||
| L1[218] | 08 | Defective current sensor 1:
Compressor M1C (Slave 1) |
•Inverter PCB. •IPM failure. •Current sensor failure. •Drive circuit failure. |
•Refer to Power Transistor Check 4. | x | System error | VRV IV | |||||||||||||||||||
| L1[219] | 09 | Defective
current sensor 2: Compressor M1C (Slave 1) |
•Inverter
PCB. •IPM failure. •Current sensor failure. •Drive circuit failure. |
•Refer to Power Transistor Check 4. | x | System error | VRV IV | |||||||||||||||||||
| L1[220] | 10 | IGBT error: Compressor M1C (Slave 1) | •Inverter PCB. •IPM failure. •Current sensor failure. •Drive circuit failure. |
•Refer to Power Transistor Check 4. | x | System error | VRV IV | |||||||||||||||||||
| L1[221] | 11 | IPM error: Compressor M1C (Slave 2) | •Inverter
PCB. •IPM failure. •Current sensor failure. •Drive circuit failure. |
•Refer to Power Transistor Check 4. | x | System error | VRV IV | |||||||||||||||||||
| L1[222] | 12 | Defective current sensor 1:
Compressor M1C (Slave 2) |
•Inverter PCB. •IPM failure. •Current sensor failure. •Drive circuit failure. |
•Refer to Power Transistor Check 4. | x | System error | VRV IV | |||||||||||||||||||
| L1[223] | 13 | Defective
current sensor 2: Compressor M1C (Slave 2) |
•Inverter
PCB. •IPM failure. •Current sensor failure. •Drive circuit failure. |
•Refer to Power Transistor Check 4. | x | System error | VRV IV | |||||||||||||||||||
| L1[224] | 14 | IGBT error: Compressor M1C (Slave 2) | •Inverter PCB. •IPM failure. •Current sensor failure. •Drive circuit failure. |
•Refer to Power Transistor Check 4. | x | System error | VRV IV | |||||||||||||||||||
| L1[225] | 15 | Jumper settings error (Slave 1) | •Inverter
PCB. •IPM failure. •Current sensor failure. •Drive circuit failure. |
•Refer to Power Transistor Check 4. | x | System error | VRV IV | |||||||||||||||||||
| L1[226] | 16 | Jumper settings error (Slave 2) | •Inverter PCB. •IPM failure. •Current sensor failure. •Drive circuit failure. |
•Refer to Power Transistor Check 4. | x | System error | VRV IV | |||||||||||||||||||
| L1[227] | 17 | Instantaneous overcurrent - Inverter compressor 2 – Master unit | •Inverter
PCB. •IPM failure. •Current sensor failure. •Drive circuit failure. |
•Refer to Power Transistor Check 4. | x | System error | VRV IV | |||||||||||||||||||
| L1[228] | 18 | Defective current sensor - Inverter compressor 2 – Master unit | •Inverter PCB. •IPM failure. •Current sensor failure. •Drive circuit failure. |
•Refer to Power Transistor Check 4. | x | System error | VRV IV | |||||||||||||||||||
| L1[229] | 19 | Current offset - Inverter compressor 2 – Master unit | •Inverter
PCB. •IPM failure. •Current sensor failure. •Drive circuit failure. |
•Refer to Power Transistor Check 4. | x | System error | VRV IV | |||||||||||||||||||
| L1[230] | 20 | Defective power transistors - Inverter compressor 2 – Master unit | •Inverter PCB. •IPM failure. •Current sensor failure. •Drive circuit failure. |
•Refer to Power Transistor Check 4. | x | System error | VRV IV | |||||||||||||||||||
| L1[231] | 21 | Jumper settings Inverter - Inverter compressor 2 – Master unit | •Inverter
PCB. •IPM failure. •Current sensor failure. •Drive circuit failure. |
•Refer to Power Transistor Check 4. | x | System error | VRV IV | |||||||||||||||||||
| L1[232] | 22 | Instantaneous overcurrent - Inverter compressor 2 – Slave unit 1 | •Inverter PCB. •IPM failure. •Current sensor failure. •Drive circuit failure. |
•Refer to Power Transistor Check 4. | x | System error | VRV IV | |||||||||||||||||||
| L1[233] | 23 | Defective current sensor - Inverter compressor 2 – Slave unit 1 | •Inverter
PCB. •IPM failure. •Current sensor failure. •Drive circuit failure. |
•Refer to Power Transistor Check 4. | x | System error | VRV IV | |||||||||||||||||||
| L1[234] | 24 | Current offset - Inverter compressor 2 – Slave unit 1 | •Inverter PCB. •IPM failure. •Current sensor failure. •Drive circuit failure. |
•Refer to Power Transistor Check 4. | x | System error | VRV IV | |||||||||||||||||||
| L1[235] | 25 | Defective power transistors - Inverter compressor 2 – Slave unit 1 | •Inverter
PCB. •IPM failure. •Current sensor failure. •Drive circuit failure. |
•Refer to Power Transistor Check 4. | x | System error | VRV IV | |||||||||||||||||||
| L1[236] | 26 | Jumper settings inverter - Inverter compressor 2 – Slave unit 1 | •Inverter PCB. •IPM failure. •Current sensor failure. •Drive circuit failure. |
•Refer to Power Transistor Check 4. | x | System error | VRV IV | |||||||||||||||||||
| L1[237] | 28 | Defective fan PCB EEPROM: Fan M1F (Master) | •Inverter
PCB. •IPM failure. •Current sensor failure. •Drive circuit failure. |
•Refer to Power Transistor Check 4. | x | System error | VRV IV | |||||||||||||||||||
| L1[238] | 29 | Defective fan PCB EEPROM: Fan M2F (Master) | •Inverter PCB. •IPM failure. •Current sensor failure. •Drive circuit failure. |
•Refer to Power Transistor Check 4. | x | System error | VRV IV | |||||||||||||||||||
| L1[239] | 32 | Defective fan PCB EEPROM: Fan M1F (Slave 1) | •Inverter
PCB. •IPM failure. •Current sensor failure. •Drive circuit failure. |
•Refer to Power Transistor Check 4. | x | System error | VRV IV | |||||||||||||||||||
| L1[240] | 33 | Defective fan PCB EEPROM: Fan M2F (Slave 1) | •Inverter PCB. •IPM failure. •Current sensor failure. •Drive circuit failure. |
•Refer to Power Transistor Check 4. | x | System error | VRV IV | |||||||||||||||||||
| L1[241] | 34 | Defective fan PCB EEPROM: Fan M1F (Slave 2) | •Inverter
PCB. •IPM failure. •Current sensor failure. •Drive circuit failure. |
•Refer to Power Transistor Check 4. | x | System error | VRV IV | |||||||||||||||||||
| L1[242] | 35 | Defective fan PCB EEPROM: Fan M2F (Slave 2) | •Inverter PCB. •IPM failure. •Current sensor failure. •Drive circuit failure. |
•Refer to Power Transistor Check 4. | x | System error | VRV IV | |||||||||||||||||||
| L1[243] | 36 | Defective
inverter PCB EEPROM: Compressor M1C (Master) |
•Inverter
PCB. •IPM failure. •Current sensor failure. •Drive circuit failure. |
•Refer to Power Transistor Check 4. | x | System error | VRV IV | |||||||||||||||||||
| L1[244] | 37 | Defective inverter PCB EEPROM:
Compressor M2C (Master) |
•Inverter PCB. •IPM failure. •Current sensor failure. •Drive circuit failure. |
•Refer to Power Transistor Check 4. | x | System error | VRV IV | |||||||||||||||||||
| L1[245] | 38 | Defective
inverter PCB EEPROM: Compressor M1C (Slave 1) |
•Inverter
PCB. •IPM failure. •Current sensor failure. •Drive circuit failure. |
•Refer to Power Transistor Check 4. | x | System error | VRV IV | |||||||||||||||||||
| L1[246] | 39 | Defective inverter PCB EEPROM:
Compressor M2C (Slave 1) |
•Inverter PCB. •IPM failure. •Current sensor failure. •Drive circuit failure. |
•Refer to Power Transistor Check 4. | x | System error | VRV IV | |||||||||||||||||||
| L1[247] | 40 | Defective inverter PCB EEPROM:
Compressor M1C (Slave 2) |
•Inverter
PCB. •IPM failure. •Current sensor failure. •Drive circuit failure. |
•Refer to Power Transistor Check 4. | x | System error | VRV IV | |||||||||||||||||||
| L1[248] | 41 | Defective inverter PCB EEPROM:
Compressor M2C (Slave 2) |
•Inverter PCB. •IPM failure. •Current sensor failure. •Drive circuit failure. |
•Refer to Power Transistor Check 4. | x | System error | VRV IV | |||||||||||||||||||
| L1[249] | 46 | DIP switch settings error (Slave 2) | •Inverter
PCB. •IPM failure. •Current sensor failure. •Drive circuit failure. |
•Refer to Power Transistor Check 4. | x | System error | VRV IV | |||||||||||||||||||
| L1[250] | 47 | 15 V power supply error:
Compressor M1C (Master) |
•Inverter PCB. •IPM failure. •Current sensor failure. •Drive circuit failure. |
•Refer to Power Transistor Check 4. | x | System error | VRV IV | |||||||||||||||||||
| L1[251] | 48 | 16
V power supply error: Compressor M2C (Master) |
•Inverter
PCB. •IPM failure. •Current sensor failure. •Drive circuit failure. |
•Refer to Power Transistor Check 4. | x | System error | VRV IV | |||||||||||||||||||
| L1[252] | 49 | 15 V power supply error:
Compressor M1C (Slave 1) |
•Inverter PCB. •IPM failure. •Current sensor failure. •Drive circuit failure. |
•Refer to Power Transistor Check 4. | x | System error | VRV IV | |||||||||||||||||||
| L1[253] | 50 | 16
V power supply error: Compressor M2C (Slave 1) |
•Inverter
PCB. •IPM failure. •Current sensor failure. •Drive circuit failure. |
•Refer to Power Transistor Check 4. | x | System error | VRV IV | |||||||||||||||||||
| L1[254] | 51 | 15 V power supply error: Compressor M1C (Slave 2) | •Inverter PCB. •IPM failure. •Current sensor failure. •Drive circuit failure. |
•Refer to Power Transistor Check 4. | x | System error | VRV IV | |||||||||||||||||||
| L1[255] | 52 | 15 V power supply error: Compressor M2C (Slave 2) | •Inverter
PCB. •IPM failure. •Current sensor failure. •Drive circuit failure. |
•Refer to Power Transistor Check 4. | x | System error | VRV IV | |||||||||||||||||||
| L2 | 0x72 | 01 | Momentary power failure during
test operation (Master) |
•Defective connection of
harness. •Defective reactor surface thermistor. •Defective inverter PCB. |
Check power transmission wiring connections. | x | System error | VRV IV | ||||||||||||||||||
| L2 | 02 | Momentary
power failure during test operation (Slave 1) |
•Defective
connection of harness. •Defective reactor surface thermistor. •Defective inverter PCB. |
Check power transmission wiring connections. | x | System error | VRV IV | |||||||||||||||||||
| L2 | 03 | Momentary power failure during
test operation (Slave 2) |
•Defective connection of
harness. •Defective reactor surface thermistor. •Defective inverter PCB. |
Check power transmission wiring connections. | x | System error | VRV IV | |||||||||||||||||||
| L2 | 04 | Power ON – Master unit | •Defective
connection of harness. •Defective reactor surface thermistor. •Defective inverter PCB. |
Check power transmission wiring connections. | x | System error | VRV IV | |||||||||||||||||||
| L2 | 05 | Power ON – Slave unit 1 | •Defective connection of
harness. •Defective reactor surface thermistor. •Defective inverter PCB. |
Check power transmission wiring connections. | x | System error | VRV IV | |||||||||||||||||||
| L2 | 06 | Power ON – Slave unit 2 | •Defective
connection of harness. •Defective reactor surface thermistor. •Defective inverter PCB. |
Check power transmission wiring connections. | x | System error | VRV IV | |||||||||||||||||||
| L3[256] | 0x73 | Switch box temp increase | •Defective outdoor fan
motor. •Short circuit. •Defective radiation fin thermistor. •Disconnection of connector. •Defective outdoor unit PCB. •Fin temperature rise due to defective outdoor unit fan. •Fin temperature rise due to short-circuit. |
•Refer to RA Check 17, 19. •Refer the Altherma Check 6, 7, 9. |
x | REYQ-T | System error | RA , Altherma split | L3 | |||||||||||||||||
| L3[257] | 01 | Reactor
temperature rise: Inverter PCB (Master) |
•Defective
connection of harness. •Defective reactor surface thermistor. •Defective inverter PCB. |
x | System error | VRV IV | ||||||||||||||||||||
| L3[258] | 03 | Reactor temperature rise: Inverter
PCB (Slave 1) |
•Defective connection of
harness. •Defective reactor surface thermistor. •Defective inverter PCB. |
x | System error | VRV IV | ||||||||||||||||||||
| L3[259] | 05 | Reactor
temperature rise: Inverter PCB (Slave 2) |
•Defective
connection of harness. •Defective reactor surface thermistor. •Defective inverter PCB. |
x | System error | VRV IV | ||||||||||||||||||||
| L4[260] | 0x74 | Heat dissipation fin temp increase | •Actuation of radiation fin
thermal (Actuates above 179.6°F (230V). •Defective inverter PCB. •Defective radiation fin thermistor. •Defective outdoor fan motor |
Refer to RA Check 17 and 19. •Refer to Altherma check 6, 7, 9. |
x | REYQ-T | System error | VRV, Skyair, RA | L4 | |||||||||||||||||
| L4[261] | 01 | Radiation fin temperature rise: INV. PCB 1 – Master | •Radiation
fin plate not fixed with screws. •U0 error. •Defective fan PCB. •High outdoor air temperature. |
Sensor error | VRV IV | |||||||||||||||||||||
| L4[262] | 02 | Radiation fin temperature rise: INV. PCB 1 – Slave 1 | •Radiation fin plate not fixed
with screws. •U0 error. •Defective fan PCB. •High outdoor air temperature. |
Sensor error | VRV IV | |||||||||||||||||||||
| L4[263] | 03 | Radiation fin temperature rise: INV. PCB 1 – Slave 2 | •Radiation
fin plate not fixed with screws. •U0 error. •Defective fan PCB. •High outdoor air temperature. |
Sensor error | VRV IV | |||||||||||||||||||||
| L4[264] | 06 | Radiation fin temperature rise: Fan M1F (Master) | •Radiation fin plate not fixed
with screws. •U0 error. •Defective fan PCB. •High outdoor air temperature. |
Sensor error | VRV IV | |||||||||||||||||||||
| L4[265] | 07 | Radiation fin temperature rise: Fan M2F (Master) | •Radiation
fin plate not fixed with screws. •U0 error. •Defective fan PCB. •High outdoor air temperature. |
Sensor error | VRV IV | |||||||||||||||||||||
| L4[266] | 09 | Radiation fin temperature rise: INV. PCB 2 – Master | •Radiation fin plate not fixed
with screws. •U0 error. •Defective fan PCB. •High outdoor air temperature. |
Sensor error | VRV IV | |||||||||||||||||||||
| L4[267] | 10 | Radiation fin temperature rise: INV. PCB 2 – Slave 1 | •Radiation
fin plate not fixed with screws. •U0 error. •Defective fan PCB. •High outdoor air temperature. |
Sensor error | VRV IV | |||||||||||||||||||||
| L4[268] | 11 | Radiation fin temperature rise: INV. PCB 2 – Slave 2 | •Radiation fin plate not fixed
with screws. •U0 error. •Defective fan PCB. •High outdoor air temperature. |
Sensor error | VRV IV | |||||||||||||||||||||
| L4[269] | 12 | Inverter
radiation fin temperature rise abnormality (Master) |
•Radiation
fin plate not fixed with screws. •U0 error. •Defective fan PCB. •High outdoor air temperature. |
Sensor error | VRV IV | |||||||||||||||||||||
| L4[270] | 13 | Inverter radiation fin temperature
rise abnormality (Slave 1) |
•Radiation fin plate not fixed
with screws. •U0 error. •Defective fan PCB. •High outdoor air temperature. |
Sensor error | VRV IV | |||||||||||||||||||||
| L4[271] | 14 | Inverter
radiation fin temperature rise abnormality (Slave 2) |
•Radiation
fin plate not fixed with screws. •U0 error. •Defective fan PCB. •High outdoor air temperature. |
Sensor error | VRV IV | |||||||||||||||||||||
| L4[272] | 18 | Radiation fin temperature rise: Fan M1F (Slave 1) | •Radiation fin plate not fixed
with screws. •U0 error. •Defective fan PCB. •High outdoor air temperature. |
Sensor error | VRV IV | |||||||||||||||||||||
| L4[273] | 19 | Radiation fin temperature rise: Fan M2F (Slave 1) | •Radiation
fin plate not fixed with screws. •U0 error. •Defective fan PCB. •High outdoor air temperature. |
Sensor error | VRV IV | |||||||||||||||||||||
| L4[274] | 20 | Radiation fin temperature rise: Fan M1F (Slave 2) | •Radiation fin plate not fixed
with screws. •U0 error. •Defective fan PCB. •High outdoor air temperature. |
Sensor error | VRV IV | |||||||||||||||||||||
| L4[275] | 21 | Radiation fin temperature rise: Fan M2F (Slave 2) | •Radiation
fin plate not fixed with screws. •U0 error. •Defective fan PCB. •High outdoor air temperature. |
Sensor error | VRV IV | |||||||||||||||||||||
| L5[276] | 0x75 | Output overcurrent detection/DC output overcurrent | •Poor installation
condition. •Closed stop valve. •Defective power module. •Wrong internal wiring. •Abnormal power supply voltage. •Defective outdoor unit PCB. •Supply voltage is not as specified. •Defective compressor. |
•Refer toRA Check 15, 17, 18,
22. •Refer to Altherma Checks 7, 8, 13. |
x | REYQ-T | System error | RA, Altherma | L5 | |||||||||||||||||
| L5[277] | 03 | Inverter compressor 1 momentary overcurrent (Master) | •Defective
compressor coil (such as wiring disconnection or insulation failure). •Compressor startup failure (mechanical lock). •Defective inverter PCB. |
•Refer to Power Transistor Check 4. | x | System error | VRV IV | |||||||||||||||||||
| L5[278] | 05 | Inverter compressor 1 momentary overcurrent (Slave 1) | •Defective compressor coil (such
as wiring disconnection or insulation failure). •Compressor startup failure (mechanical lock). •Defective inverter PCB. |
•Refer to Power Transistor Check 4. | x | System error | VRV IV | |||||||||||||||||||
| L5[279] | 07 | Inverter compressor 1 momentary overcurrent (Slave 2) | •Defective
compressor coil (such as wiring disconnection or insulation failure). •Compressor startup failure (mechanical lock). •Defective inverter PCB. |
•Refer to Power Transistor Check 4. | x | System error | VRV IV | |||||||||||||||||||
| L5[280] | 14 | Inverter compressor 2 momentary overcurrent (Master) | •Defective compressor coil (such
as wiring disconnection or insulation failure). •Compressor startup failure (mechanical lock). •Defective inverter PCB. |
•Inverter compressor 2 momentary overcurrent (Master). | x | System error | VRV IV | |||||||||||||||||||
| L5[281] | 15 | Inverter compressor 2 momentary overcurrent (Slave 1) | •Defective
compressor coil (such as wiring disconnection or insulation failure). •Compressor startup failure (mechanical lock). •Defective inverter PCB. |
•Inverter compressor 2 momentary overcurrent (Slave 1). | x | System error | VRV IV | |||||||||||||||||||
| L5[282] | 16 | Inverter compressor 2 momentary overcurrent (Slave 2) | •Defective compressor coil (such
as wiring disconnection or insulation failure). •Compressor startup failure (mechanical lock). •Defective inverter PCB. |
•Inverter compressor 2 momentary overcurrent (Slave 2). | x | System error | VRV IV | |||||||||||||||||||
| What does the (instant) refer to?[283] | inverter instantaneous overcurrent AC output | L6[284] | 0x76 | AC output overcurrent (instant) | x | System error | L6 | |||||||||||||||||||
| What is the (multi) refer to?[285] | reserved for future use | L7[286] | 0x77 | A/C (multi) total input overcurrent | x | System error | L7 | |||||||||||||||||||
| L8[287] | 0x78 | Inverter compressor overcurrent/Electronic thermal switch | •Compressor
overload. •Compressor coil disconnected. •Defective inverter PCB. •Defective compressor. •Faulty compressor (if bearing is scratched). |
•Verify
correct incoming voltage and phase balance. •Test diode bridge and power transistors check 4 in service manual. •Meg ohm compressor. |
x | REYQ-T | System error | Condensing Unit (SkyAir, VRV), Altherma MonoBloc | L8 | |||||||||||||||||
| L8[288] | 03 | Inverter compressor 1 overcurrent (Master) | •Compressor overloaded. •Wiring disconnection in compressor coil. •Disconnection of compressor wiring. •Defective inverter PCB. •Incorrect power supply voltage. |
•Refer to Power Transistor Check 4. | System error | VRV IV | ||||||||||||||||||||
| L8[289] | 06 | Inverter compressor 1 overcurrent (Slave 1) | •Compressor
overloaded. •Wiring disconnection in compressor coil. •Disconnection of compressor wiring. •Defective inverter PCB. •Incorrect power supply voltage. |
•Refer to Power Transistor Check 4. | System error | VRV IV | ||||||||||||||||||||
| L8[290] | 07 | Inverter compressor 1 overcurrent (Slave 2) | •Compressor overloaded. •Wiring disconnection in compressor coil. •Disconnection of compressor wiring. •Defective inverter PCB. •Incorrect power supply voltage. |
•Refer to Power Transistor Check 4. | System error | VRV IV | ||||||||||||||||||||
| L8[291] | 11 | Inverter compressor 2 overcurrent (Master) | •Compressor
overloaded. •Wiring disconnection in compressor coil. •Disconnection of compressor wiring. •Defective inverter PCB. •Incorrect power supply voltage. |
•Inverter compressor 2 overcurrent (Master). | System error | VRV IV | ||||||||||||||||||||
| L8[292] | 12 | Inverter compressor 2 overcurrent (Slave 1) | •Compressor overloaded. •Wiring disconnection in compressor coil. •Disconnection of compressor wiring. •Defective inverter PCB. •Incorrect power supply voltage. |
•Inverter compressor 2 overcurrent (Slave 1). | System error | VRV IV | ||||||||||||||||||||
| L8[293] | 13 | Second Sub Outdoor Unit Second Inverter Compressor Momentary Over Current Fault | •Compressor
overloaded. •Wiring disconnection in compressor coil. •Disconnection of compressor wiring. •Defective inverter PCB. •Incorrect power supply voltage. |
System error | VRV IV | |||||||||||||||||||||
| L9[294] | 0x79 | Inverter compressor start up/Stall prevention (time lag) error | •Failure
to open the stop valve. •Defective compressor. •Defective compressor connection. •Large pressure difference before starting the compressor. •Defective inverter PCB. •Compressor lock. |
•Refer to Power Transistor Check 4. | x | REYQ-T | System error | VRV IV | L9 | |||||||||||||||||
| L9[295] | 01 | Compressor M1C startup error (Master) | •The
stop valve is not opened. •Defective compressor. •Error in wire connections to compressor. •Large differential pressure before compressor startup. •Defective inverter PCB. |
•Refer to Power Transistor Check 4. | x | System error | VRV IV | |||||||||||||||||||
| L9[296] | 05 | Compressor M1C startup error (Slave 1) | •The
stop valve is not opened. •Defective compressor. •Error in wire connections to compressor. •Large differential pressure before compressor startup. •Defective inverter PCB. |
•Refer to Power Transistor Check 4. | x | System error | VRV IV | |||||||||||||||||||
| L9[297] | 06 | Compressor M1C startup error (Slave 2) | •The
stop valve is not opened. •Defective compressor. •Error in wire connections to compressor. •Large differential pressure before compressor startup. •Defective inverter PCB. |
•Refer to Power Transistor Check 4. | x | System error | VRV IV | |||||||||||||||||||
| L9[298] | 10 | Main Outdoor Unit Second Inverter Compressor Over Current Fault | •The
stop valve is not opened. •Defective compressor. •Error in wire connections to compressor. •Large differential pressure before compressor startup. •Defective inverter PCB. |
•Refer to Power Transistor Check 4. | x | System error | VRV IV | |||||||||||||||||||
| L9[299] | 11 | First Sub Unit Outdoor Slave Second Inverter Compressor Over Current Fault. | •The
stop valve is not opened. •Defective compressor. •Error in wire connections to compressor. •Large differential pressure before compressor startup. •Defective inverter PCB. |
•Refer to Power Transistor Check 4. | x | System error | VRV IV | |||||||||||||||||||
| L9[300] | 12 | Second Sub Unit Outdoor Slave Second Inverter Compressor Over Current Fault. | •The
stop valve is not opened. •Defective compressor. •Error in wire connections to compressor. •Large differential pressure before compressor startup. •Defective inverter PCB. |
•Refer to Power Transistor Check 4. | x | System error | VRV IV | |||||||||||||||||||
| L9[301] | 13 | Inverter output open phase (Master) | •The
stop valve is not opened. •Defective compressor. •Error in wire connections to compressor. •Large differential pressure before compressor startup. •Defective inverter PCB. |
•Refer to Power Transistor Check 4. | x | System error | VRV IV | |||||||||||||||||||
| L9[302] | 14 | Inverter output open phase (Slave 1) | •The
stop valve is not opened. •Defective compressor. •Error in wire connections to compressor. •Large differential pressure before compressor startup. •Defective inverter PCB. |
•Refer to Power Transistor Check 4. | x | System error | VRV IV | |||||||||||||||||||
| L9[303] | 15 | Inverter output open phase (Slave 2) | •The
stop valve is not opened. •Defective compressor. •Error in wire connections to compressor. •Large differential pressure before compressor startup. •Defective inverter PCB. |
•Refer to Power Transistor Check 4. | x | System error | VRV IV | |||||||||||||||||||
| LA[304] | 0x7A | Power transistor error | x | System error | LA | |||||||||||||||||||||
| LH[305] | 0x7B | Power generation converter error | x | System error | LA(B) | |||||||||||||||||||||
| LC[306] | 0x7C | Transmission error between Inv & PCB | •Defective
connection between the inverter PCB and outdoor main PCB. •Defective outdoor main PCB (transmission section). •Defective inverter PCB. •Defective noise filter. •Defective fan inverter. •Incorrect type of inverter PCB. •Defective inverter compressor. •Defective fan motor. •External factor (noise etc.). |
x | REYQ-T | System error | Condensing Unit (SkyAir, VRV) Altherma MonoBloc | LC | ||||||||||||||||||
| LC[307] | 14 | Transmission
error (Between outdoor units, inverter PCB) (Master) |
•Defective
connection between the inverter PCB and the outdoor unit main PCB. •Defective outdoor unit main PCB (transmission block). •Defective noise filter, compressor or fan motor. •External factors (e.g. noise). •Failure of inverter PCB or fan PCB. |
•Look for any type of grounded componant coming off the A1P board. | x | System error | VRV IV | |||||||||||||||||||
| LC[308] | 15 | Transmission error (Between
outdoor units, inverter PCB) (Slave 1) |
•Defective
connection between the inverter PCB and the outdoor unit main PCB. •Defective outdoor unit main PCB (transmission block). •Defective noise filter, compressor or fan motor. •External factors (e.g. noise). •Failure of inverter PCB or fan PCB. |
•Look for any type of grounded componant coming off the A1P board. | x | System error | VRV IV | |||||||||||||||||||
| LC[309] | 16 | Transmission
error (Between outdoor units, inverter PCB) (Slave 2) |
•Defective
connection between the inverter PCB and the outdoor unit main PCB. •Defective outdoor unit main PCB (transmission block). •Defective noise filter, compressor or fan motor. •External factors (e.g. noise). •Failure of inverter PCB or fan PCB. |
•Look for any type of grounded componant coming off the A1P board. | x | System error | VRV IV | |||||||||||||||||||
| LC[310] | 19 | Transmission error [Between outdoor units, Fan 1] (Master) | •Defective
connection between the inverter PCB and the outdoor unit main PCB. •Defective outdoor unit main PCB (transmission block). •Defective noise filter, compressor or fan motor. •External factors (e.g. noise). •Failure of inverter PCB or fan PCB. |
•Look for any type of grounded componant coming off the A1P board. | x | System error | VRV IV | |||||||||||||||||||
| LC[311] | 20 | Transmission error [Between outdoor units, Fan 1] (Slave 1) | •Defective
connection between the inverter PCB and the outdoor unit main PCB. •Defective outdoor unit main PCB (transmission block). •Defective noise filter, compressor or fan motor. •External factors (e.g. noise). •Failure of inverter PCB or fan PCB. |
•Look for any type of grounded componant coming off the A1P board. | x | System error | VRV IV | |||||||||||||||||||
| LC[312] | 21 | Transmission error [Between outdoor units, Fan 1] (Slave 2) | •Defective
connection between the inverter PCB and the outdoor unit main PCB. •Defective outdoor unit main PCB (transmission block). •Defective noise filter, compressor or fan motor. •External factors (e.g. noise). •Failure of inverter PCB or fan PCB. |
•Look for any type of grounded componant coming off the A1P board. | x | System error | VRV IV | |||||||||||||||||||
| LC[313] | 24 | Transmission error [Between outdoor units, Fan 2] (Master) | •Defective
connection between the inverter PCB and the outdoor unit main PCB. •Defective outdoor unit main PCB (transmission block). •Defective noise filter, compressor or fan motor. •External factors (e.g. noise). •Failure of inverter PCB or fan PCB. |
•Look for any type of grounded componant coming off the A1P board. | x | System error | VRV IV | |||||||||||||||||||
| LC[314] | 25 | Transmission error [Between outdoor units, Fan 2] (Slave 1) | •Defective
connection between the inverter PCB and the outdoor unit main PCB. •Defective outdoor unit main PCB (transmission block). •Defective noise filter, compressor or fan motor. •External factors (e.g. noise). •Failure of inverter PCB or fan PCB. |
•Look for any type of grounded componant coming off the A1P board. | x | System error | VRV IV | |||||||||||||||||||
| LC[315] | 26 | Transmission error [Between outdoor units, Fan 2] (Slave 2) | •Defective
connection between the inverter PCB and the outdoor unit main PCB. •Defective outdoor unit main PCB (transmission block). •Defective noise filter, compressor or fan motor. •External factors (e.g. noise). •Failure of inverter PCB or fan PCB. |
•Look for any type of grounded componant coming off the A1P board. | x | System error | VRV IV | |||||||||||||||||||
| LC[316] | 30 | Transmission error [Between outdoor units, INV. 2] (Master) | •Defective
connection between the inverter PCB and the outdoor unit main PCB. •Defective outdoor unit main PCB (transmission block). •Defective noise filter, compressor or fan motor. •External factors (e.g. noise). •Failure of inverter PCB or fan PCB. |
•Look for any type of grounded componant coming off the A1P board. | x | System error | VRV IV | |||||||||||||||||||
| LC[317] | 31 | Transmission error [Between outdoor units, INV. 2] (Slave 1) | •Defective
connection between the inverter PCB and the outdoor unit main PCB. •Defective outdoor unit main PCB (transmission block). •Defective noise filter, compressor or fan motor. •External factors (e.g. noise). •Failure of inverter PCB or fan PCB. |
•Look for any type of grounded componant coming off the A1P board. | x | System error | VRV IV | |||||||||||||||||||
| LC[318] | 32 | Transmission error [Between outdoor units, INV. 2] (Slave 2) | •Defective
connection between the inverter PCB and the outdoor unit main PCB. •Defective outdoor unit main PCB (transmission block). •Defective noise filter, compressor or fan motor. •External factors (e.g. noise). •Failure of inverter PCB or fan PCB. |
•Look for any type of grounded componant coming off the A1P board. | x | System error | VRV IV | |||||||||||||||||||
| LC[319] | 33 | Transmission
error (Between outdoor units, sub PCB) (Master) |
•Defective
connection between the inverter PCB and the outdoor unit main PCB. •Defective outdoor unit main PCB (transmission block). •Defective noise filter, compressor or fan motor. •External factors (e.g. noise). •Failure of inverter PCB or fan PCB. |
•Look for any type of grounded componant coming off the A1P board. | x | System error | VRV IV | |||||||||||||||||||
| LC[320] | 34 | Transmission error (Between
outdoor units, sub PCB) (Slave 1) |
•Defective
connection between the inverter PCB and the outdoor unit main PCB. •Defective outdoor unit main PCB (transmission block). •Defective noise filter, compressor or fan motor. •External factors (e.g. noise). •Failure of inverter PCB or fan PCB. |
•Look for any type of grounded componant coming off the A1P board. | x | System error | VRV IV | |||||||||||||||||||
| LC[321] | 35 | Transmission
error (Between outdoor units, sub PCB) (Slave 2) |
•Defective
connection between the inverter PCB and the outdoor unit main PCB. •Defective outdoor unit main PCB (transmission block). •Defective noise filter, compressor or fan motor. •External factors (e.g. noise). •Failure of inverter PCB or fan PCB. |
•Look for any type of grounded componant coming off the A1P board. | x | System error | VRV IV | |||||||||||||||||||
| LJ[322] | 0x7D | Engine stop | x | System error | LJ(D) | |||||||||||||||||||||
| LE[323] | 0x7E | Igniter error or disconnection | x | System error | LE | |||||||||||||||||||||
| LF[324] | 0x7F | Engine failed to start | x | System error | LF | |||||||||||||||||||||
| P0[325] | 0x80 | Out of gas (heat storage) | x | System error | P0 | |||||||||||||||||||||
| P1[326] | 0x81 | Power supply imbalance/Inverter Over-Ripple Protection | •Open
phase. •Voltage imbalance between phases. •Defective main circuit capacitor. •Defective inverter PCB. •Defective K1M, K2M relay in inverter PCB. •Improper main circuit wiring. •Disconnection in diode module. •Faulty K11R, K12R. |
•Test Incoming voltage across all legs and ground for 2% or less imbalance. | x | REYQ-T | System error | Condensing Unit (SkyAir, VRV), Altherma MonoBloc | P1 | |||||||||||||||||
| P1[327] | 01 | Inverter 1 power supply unbalanced voltage (Master) | •Open
phase. •Interphase voltage imbalance. •Defective capacitor in the main circuit. •Defective inverter PCB. •Defective magnetic relay. •Defective wiring in the main circuit. |
•Verify that the incoming power on the Slave unit 1 is no more than 10% out between the phases. | x | System error | VRV IV | |||||||||||||||||||
| P1[328] | 02 | Inverter 1 power supply unbalanced voltage (Slave 1) | •Open phase. •Interphase voltage imbalance. •Defective capacitor in the main circuit. •Defective inverter PCB. •Defective magnetic relay. •Defective wiring in the main circuit. |
•Verify that the incoming power on the Slave unit 1 is no more than 10% out between the phases. | x | System error | VRV IV | |||||||||||||||||||
| P1[329] | 03 | Inverter 1 power supply unbalanced voltage (Slave 2) | •Open
phase. •Interphase voltage imbalance. •Defective capacitor in the main circuit. •Defective inverter PCB. •Defective magnetic relay. •Defective wiring in the main circuit. |
•Verify that the incoming power on the Slave unit 1 is no more than 10% out between the phases. | x | System error | VRV IV | |||||||||||||||||||
| P1[330] | 07 | Inverter 2 power supply unbalanced voltage (Master) | •Open phase. •Interphase voltage imbalance. •Defective capacitor in the main circuit. •Defective inverter PCB. •Defective magnetic relay. •Defective wiring in the main circuit. |
•Verify that the incoming power on the Slave unit 1 is no more than 10% out between the phases. | x | System error | VRV IV | |||||||||||||||||||
| P1[331] | 08 | Inverter 2 power supply unbalanced voltage (Slave 1) | •Open
phase. •Interphase voltage imbalance. •Defective capacitor in the main circuit. •Defective inverter PCB. •Defective magnetic relay. •Defective wiring in the main circuit. |
•Verify that the incoming power on the Slave unit 1 is no more than 10% out between the phases. | x | System error | VRV IV | |||||||||||||||||||
| P1[332] | 09 | Inverter 2 power supply unbalanced voltage (Slave 2) | •Open phase. •Interphase voltage imbalance. •Defective capacitor in the main circuit. •Defective inverter PCB. •Defective magnetic relay. •Defective wiring in the main circuit. |
•Verify that the incoming power on the Slave unit 1 is no more than 10% out between the phases. | x | System error | VRV IV | |||||||||||||||||||
| P3[333] | 0x83 | Reactor temp error | REYQ-T | Sensor error | P3 | |||||||||||||||||||||
| P3[334] | 01 | Defective reactor thermistor 1 (Master: INV. PCB 1) | •Defective connection of
thermistor. •Defective reactor thermistor. •Defective inverter PCB. |
x | Sensor error | VRV IV | ||||||||||||||||||||
| P3[335] | 02 | Defective reactor thermistor 1 (Slave 1: INV. PCB 1) | •Defective
connection of thermistor. •Defective reactor thermistor. •Defective inverter PCB. |
x | Sensor error | VRV IV | ||||||||||||||||||||
| P3[336] | 03 | Defective reactor thermistor 1 (Slave 2: INV. PCB 1) | •Defective connection of
thermistor. •Defective reactor thermistor. •Defective inverter PCB. |
x | Sensor error | VRV IV | ||||||||||||||||||||
| P3[337] | 04 | Defective reactor thermistor 2 (Master: INV. PCB 1) | •Defective
connection of thermistor. •Defective reactor thermistor. •Defective inverter PCB. |
x | Sensor error | VRV IV | ||||||||||||||||||||
| P3[338] | 05 | Defective reactor thermistor 2 (Slave 1: INV. PCB 1) | •Defective connection of
thermistor. •Defective reactor thermistor. •Defective inverter PCB. |
x | Sensor error | VRV IV | ||||||||||||||||||||
| P3[339] | 06 | Defective reactor thermistor 2 (Slave 2: INV. PCB 1) | •Defective
connection of thermistor. •Defective reactor thermistor. •Defective inverter PCB. |
x | Sensor error | VRV IV | ||||||||||||||||||||
| P3[340] | 07 | Defective reactor thermistor 1 (Master: INV. PCB 2) | •Defective connection of
thermistor. •Defective reactor thermistor. •Defective inverter PCB. |
x | Sensor error | VRV IV | ||||||||||||||||||||
| P3[341] | -8 | Defective reactor thermistor 1 (Slave 1: INV. PCB 2) | •Defective
connection of thermistor. •Defective reactor thermistor. •Defective inverter PCB. |
x | Sensor error | VRV IV | ||||||||||||||||||||
| P3[342] | 09 | Defective reactor thermistor 1 (Slave 2: INV. PCB 2) | •Defective connection of
thermistor. •Defective reactor thermistor. •Defective inverter PCB. |
x | Sensor error | VRV IV | ||||||||||||||||||||
| P3[343] | 10 | Defective reactor thermistor 2 (Master: INV. PCB 2) | •Defective
connection of thermistor. •Defective reactor thermistor. •Defective inverter PCB. |
x | Sensor error | VRV IV | ||||||||||||||||||||
| P3[344] | 11 | Defective reactor thermistor 2 (Slave 1: INV. PCB 2) | •Defective connection of
thermistor. •Defective reactor thermistor. •Defective inverter PCB. |
x | Sensor error | VRV IV | ||||||||||||||||||||
| P3[345] | 12 | Defective reactor thermistor 2 (Slave 2: INV. PCB 2) | •Defective
connection of thermistor. •Defective reactor thermistor. •Defective inverter PCB. |
x | Sensor error | VRV IV | ||||||||||||||||||||
| P4[346] | 0x84 | Heat dissipation fin temp error | •Disconnection of the connector
for the thermistor. •Thermistor corresponding to the error code is defective. •Defective heat exchanger thermistor in the case of J3 error (outdoor heat exchanger thermistorin cooling operation, or indoor heat exchanger thermistor in heating operation). •Defective outdoor unit PCB. •Hydro-box PCB defective. •Defective inverter compressor. |
•Refer to RA Check 1. •Sky air test the resistance value of the radiation fin thermistor. •Verify/test the condition of the outdoor fans, compressor and inverter/main PCB. •Refer to Altherma Check 6. |
x | REYQ-T | minor | Sensor error | RA, VRV, Skyair, Altherma | P4 | ||||||||||||||||
| P4[347] | 01 | Defective Radiation fin thermistor (Master: INV. PCB 1) | •Defective
radiation fin temperature thermistor. •Defective inverter PCB. •Defective compressor. •Defective fan motor. |
x | Sensor error | VRV IV | ||||||||||||||||||||
| P4[348] | 02 | Defective fan M1F fin sensor (Master) | •Defective radiation fin
temperature thermistor. •Defective inverter PCB. •Defective compressor. •Defective fan motor. |
x | Sensor error | VRV IV | ||||||||||||||||||||
| P4[349] | 03 | Defective fan M2F fin sensor (Master) | •Defective
radiation fin temperature thermistor. •Defective inverter PCB. •Defective compressor. •Defective fan motor. |
x | Sensor error | VRV IV | ||||||||||||||||||||
| P4[350] | 04 | Defective Radiation fin thermistor (Slave 1: INV. PCB 1) | •Defective radiation fin
temperature thermistor. •Defective inverter PCB. •Defective compressor. •Defective fan motor. |
x | Sensor error | VRV IV | ||||||||||||||||||||
| P4[351] | 05 | Defective Radiation fin thermistor (Slave 2: INV. PCB 1) | •Defective
radiation fin temperature thermistor. •Defective inverter PCB. •Defective compressor. •Defective fan motor. |
x | Sensor error | VRV IV | ||||||||||||||||||||
| P4[352] | 06 | Defective Radiation fin thermistor (Master: INV. PCB 2) | •Defective radiation fin
temperature thermistor. •Defective inverter PCB. •Defective compressor. •Defective fan motor. |
x | Sensor error | VRV IV | ||||||||||||||||||||
| P4[353] | 07 | Defective Radiation fin thermistor (Slave 1: INV. PCB 2) | •Defective
radiation fin temperature thermistor. •Defective inverter PCB. •Defective compressor. •Defective fan motor. |
x | Sensor error | VRV IV | ||||||||||||||||||||
| P4[354] | 08 | Defective Radiation fin thermistor (Slave 2: INV. PCB 2) | •Defective radiation fin
temperature thermistor. •Defective inverter PCB. •Defective compressor. •Defective fan motor. |
x | Sensor error | VRV IV | ||||||||||||||||||||
| P4[355] | 09 | Defective
inverter diode bridge fin sensor (Master) |
•Defective
radiation fin temperature thermistor. •Defective inverter PCB. •Defective compressor. •Defective fan motor. |
x | Sensor error | VRV IV | ||||||||||||||||||||
| P4[356] | 10 | Defective inverter diode bridge
fin sensor (Slave 1) |
•Defective radiation fin
temperature thermistor. •Defective inverter PCB. •Defective compressor. •Defective fan motor. |
x | Sensor error | VRV IV | ||||||||||||||||||||
| P4[357] | 11 | Defective
inverter diode bridge fin sensor (Slave 2) |
•Defective
radiation fin temperature thermistor. •Defective inverter PCB. •Defective compressor. •Defective fan motor. |
x | Sensor error | VRV IV | ||||||||||||||||||||
| P4[358] | 15 | Defective fan M1F fin sensor (Slave 1) | •Defective fan PCB. •Defective fan motor. |
x | Sensor error | VRV IV | ||||||||||||||||||||
| P4[359] | 16 | Defective fan M2F fin sensor (Slave 1) | •Defective
fan PCB. •Defective fan motor. |
x | Sensor error | VRV IV | ||||||||||||||||||||
| P4[360] | 17 | Defective fan M1F fin sensor (Slave 2) | •Defective fan PCB. •Defective fan motor. |
x | Sensor error | VRV IV | ||||||||||||||||||||
| P4[361] | 18 | Defective fan M2F fin sensor (Slave 2) | •Defective
fan PCB. •Defective fan motor. |
x | Sensor error | VRV IV | ||||||||||||||||||||
| P5[362] | 0x85 | DC current sensor system error | System error | P5 | ||||||||||||||||||||||
| P6[363] | 0x86 | AC or DC output current sensor error | x | System error | P6 | |||||||||||||||||||||
| What sensor is this referring to?[364] | For VRV, the test function has been activated after manual charge or the auto charge has failed to start or terminate in cooling mode due to low ambient air temperature. | P7[365] | 0x87 | A/C (multi) total input sensor system error | x | System error | P7 | |||||||||||||||||||
| P8[366] | 0x88 | Engine speed defect | x | System error | P8 | |||||||||||||||||||||
| What is the attached equipment being referenced?[367] | For RA(Split), P9 is malfunction of fan motor(humidifier unit). For other products, P9 indicate automatic refrigerant charge operation completed | P9[368] | 0x89 | Automatic refrigerant charge complete | •Automatic refrigerant charge operation completed. | •Charging is finished. Close the valve A and disconnect the refrigerant tank off. | x | System error | Condensing Unit (VRV) | P9 | ||||||||||||||||
| This is the same as P9 error. Why to we need two of the same?[369] | For RA(Split), PA is broken wire of heater(humidifier unit). For other products, PA indicates refrigerant cylinder of master unit is empty | PA[370] | 0x8A | Empty refrigerant cylinder during automatic refrigerant | •Refrigerant cylinder of master unit is empty during auto charge. | •The refrigerant tank is empty. Close the valve A and replace the empty tank with a new tank. After changing the tank, open the valve A again. | x | System error | Condensing Unit (VRV) | PA | ||||||||||||||||
| PH[371] | 0x8B | Attached equipment (humidity) system fan motor error | x | System error | PH(B) | |||||||||||||||||||||
| PC[372] | 0x8C | Empty refrigerant cylinder during automatic refrigerant | •Refrigerant cylinder of slave unit 2 is empty during auto charge. | •Follow steps for error code PA. | x | System error | Condensing Unit (VRV) | PC | ||||||||||||||||||
| PJ[373] | 0x8D | Field Setting after Replacing Outdoor Unit Main PCBAbnormality or Combination of PCB Abnormality/Capacity setting error | •Mismatching of type of PCB Improper (or no) field setting after replacing outdoor unit main PCB. | x | REYQ-T | System error | VRV, Skyair, RA, Altherma MonoBloc | PJ(D) | ||||||||||||||||||
| PJ[374] | 04 | Incorrect type of inverter PCB [INV.1] (Master) | •Mismatching
of type of PCB. •Improper (or no) field setting after replacing outdoor unit main PCB. |
•Confirm
that the correct PCB is installed by verifying the EB number located on the
PCB. •Confirm the correct dip switches are set on the A1P or main PCB. •Confirm that the necessary jumpers on the PCB are in place. •Confirm that the wiring is correct, and all connection are tight. |
x | System error | VRV IV | |||||||||||||||||||
| PJ[375] | 05 | Incorrect type of inverter PCB [INV.1] (Slave 1) | •Mismatching of type of PCB. •Improper (or no) field setting after replacing outdoor unit main PCB. |
•Confirm that the correct PCB is
installed by verifying the EB number located on the PCB. •Confirm the correct dip switches are set on the A1P or main PCB. •Confirm that the necessary jumpers on the PCB are in place. •Confirm that the wiring is correct, and all connection are tight. |
x | System error | VRV IV | |||||||||||||||||||
| PJ[376] | 06 | Incorrect type of inverter PCB [INV.1] (Slave 2) | •Mismatching
of type of PCB. •Improper (or no) field setting after replacing outdoor unit main PCB. |
•Confirm
that the correct PCB is installed by verifying the EB number located on the
PCB. •Confirm the correct dip switches are set on the A1P or main PCB. •Confirm that the necessary jumpers on the PCB are in place. •Confirm that the wiring is correct, and all connection are tight. |
x | System error | VRV IV | |||||||||||||||||||
| PJ[377] | 9 | Incorrect type of inverter PCB [Fan 1] (Master) | •Mismatching of type of PCB. •Improper (or no) field setting after replacing outdoor unit main PCB. |
•Confirm that the correct PCB is
installed by verifying the EB number located on the PCB. •Confirm the correct dip switches are set on the A1P or main PCB. •Confirm that the necessary jumpers on the PCB are in place. •Confirm that the wiring is correct, and all connection are tight. |
x | System error | VRV IV | |||||||||||||||||||
| PJ[378] | 10 | Incorrect type of inverter PCB [Fan 2] (Master) | •Mismatching
of type of PCB. •Improper (or no) field setting after replacing outdoor unit main PCB. |
•Confirm
that the correct PCB is installed by verifying the EB number located on the
PCB. •Confirm the correct dip switches are set on the A1P or main PCB. •Confirm that the necessary jumpers on the PCB are in place. •Confirm that the wiring is correct, and all connection are tight. |
x | System error | VRV IV | |||||||||||||||||||
| PJ[379] | 12 | Incorrect type of inverter PCB [INV.2] (Master) | •Mismatching of type of PCB. •Improper (or no) field setting after replacing outdoor unit main PCB. |
•Confirm that the correct PCB is
installed by verifying the EB number located on the PCB. •Confirm the correct dip switches are set on the A1P or main PCB. •Confirm that the necessary jumpers on the PCB are in place. •Confirm that the wiring is correct, and all connection are tight. |
x | System error | VRV IV | |||||||||||||||||||
| PJ[380] | 13 | Incorrect type of inverter PCB [INV.2] (Slave 1) | •Mismatching
of type of PCB. •Improper (or no) field setting after replacing outdoor unit main PCB. |
•Confirm
that the correct PCB is installed by verifying the EB number located on the
PCB. •Confirm the correct dip switches are set on the A1P or main PCB. •Confirm that the necessary jumpers on the PCB are in place. •Confirm that the wiring is correct, and all connection are tight. |
x | System error | VRV IV | |||||||||||||||||||
| PJ[381] | 14 | Incorrect type of inverter PCB [INV.2] (Slave 2) | •Mismatching of type of PCB. •Improper (or no) field setting after replacing outdoor unit main PCB. |
•Confirm that the correct PCB is
installed by verifying the EB number located on the PCB. •Confirm the correct dip switches are set on the A1P or main PCB. •Confirm that the necessary jumpers on the PCB are in place. •Confirm that the wiring is correct, and all connection are tight. |
x | System error | VRV IV | |||||||||||||||||||
| PJ[382] | 15 | Incorrect type of inverter PCB [Fan 1] (Slave 1) | •Mismatching
of type of PCB. •Improper (or no) field setting after replacing outdoor unit main PCB. |
•Verify
inverter PCB part no. •Verify Fan PCB Part no. •Verify ODU PCB Dip Switches. |
x | System error | VRV IV | |||||||||||||||||||
| PJ[383] | 16 | Incorrect type of inverter PCB [Fan 1] (Slave 2) | •Mismatching of type of PCB. •Improper (or no) field setting after replacing outdoor unit main PCB. |
•Verify inverter PCB part
no. •Verify Fan PCB Part no. •Verify ODU PCB Dip Switches. |
x | System error | VRV IV | |||||||||||||||||||
| PJ[384] | 17 | Incorrect type of inverter PCB [Fan 2] (Slave 1) | •Mismatching
of type of PCB. •Improper (or no) field setting after replacing outdoor unit main PCB. |
•Verify
inverter PCB part no. •Verify Fan PCB Part no. •Verify ODU PCB Dip Switches. |
x | System error | VRV IV | |||||||||||||||||||
| PJ[385] | 18 | Incorrect type of inverter PCB [Fan 2] (Slave 2) | •Mismatching of type of PCB. •Improper (or no) field setting after replacing outdoor unit main PCB. |
•Verify inverter PCB part
no. •Verify Fan PCB Part no. •Verify ODU PCB Dip Switches. |
x | System error | VRV IV | |||||||||||||||||||
| PE[386] | 0x8E | Automatic refrigerant charge operation nearly completed | •Automatic refrigerant charge operation nearly completed. | •Charging is almost finished. Get ready to close valve A. | x | System error | Condensing Unit (VRV) | PE | ||||||||||||||||||
| PF[387] | 0x8F | Starter malfunction | x | System error | PF | |||||||||||||||||||||
| U0[388] | 0x90 | Refrigerant shortage | •Disconnection
of the discharge pipe thermistor, indoor or outdoor heat exchanger
thermistor,room or outdoor temperature thermistor. •Closed stop valve. *Refrigerant shortage (refrigerant leakage) *Poor compression performance of compressor *Defective electronic expansion valve |
x | REYQ-T | minor | System error | RA | U0 | |||||||||||||||||
| U0[389] | 05 | Refrigerant shortage warning (cooling) | •Refrigerant shortage and
refrigerant clogging (wrong piping). •Defective thermistor. •Defective low pressure sensor. •Defective outdoor unit main PCB. |
•Refer to Check 2 and 12. | x | VRV IV | ||||||||||||||||||||
| U0[390] | 06 | Refrigerant shortage warning (heating) | •Refrigerant
shortage and refrigerant clogging (wrong piping). •Defective thermistor. •Defective low pressure sensor. •Defective outdoor unit main PCB. |
•Refer to Check 2 and 12. | x | VRV IV | ||||||||||||||||||||
| U0[391] | 08 | Refrigerant shortage (Master) | •Refrigerant shortage and
refrigerant clogging (wrong piping). •Defective thermistor. •Defective low pressure sensor. •Defective outdoor unit main PCB. |
•See service manual for pressure transducer voltage and pressiure.Use mode 2-42 and 43 for pressure transducer Mpa readoutfroom A1P board. | x | VRV IV | ||||||||||||||||||||
| U0[392] | 09 | Refrigerant shortage (Slave 1) | •Refrigerant
shortage and refrigerant clogging (wrong piping). •Defective thermistor. •Defective low pressure sensor. •Defective outdoor unit main PCB. |
•See service manual for pressure transducer voltage and pressiure.Use mode 2-42 and 43 for pressure transducer Mpa readoutfroom A1P board. | x | VRV IV | ||||||||||||||||||||
| U0[393] | 10 | Refrigerant shortage (Slave 2) | •Refrigerant shortage and
refrigerant clogging (wrong piping). •Defective thermistor. •Defective low pressure sensor. •Defective outdoor unit main PCB. |
•See service manual for pressure transducer voltage and pressiure.Use mode 2-42 and 43 for pressure transducer Mpa readoutfroom A1P board. | x | VRV IV | ||||||||||||||||||||
| U1[394] | 0x91 | Reversed or open phase | •Power
supply reverse phase. •Power supply open phase. •Defective outdoor unit PCB (A1P). |
x | REYQ-T | System error | VRV | U1 | ||||||||||||||||||
| U1[395] | 01 | Reverse phase/open phase of power supply (Master) | •Power supply reverse phase. •T phase open phase. •Defective outdoor unit PCB. |
•Check power supply for open phase. Reverse any two legs of power supply. | x | System error | VRV IV | |||||||||||||||||||
| U1[396] | 04 | Reverse phase of power supply [when power ON] (Master) | •Power
supply reverse phase. •T phase open phase. •Defective outdoor unit PCB. |
•Check power supply for open phase. Reverse any two legs of power supply. | x | System error | VRV IV | |||||||||||||||||||
| U1[397] | 05 | Reverse phase/open phase of power supply (Slave 1) | •Power supply reverse phase. •T phase open phase. •Defective outdoor unit PCB. |
•Check power supply for open phase. Reverse any two legs of power supply. | x | System error | VRV IV | |||||||||||||||||||
| U1[398] | 06 | Reverse phase of power supply [when power ON] (Slave 1) | •Power
supply reverse phase. •T phase open phase. •Defective outdoor unit PCB. |
•Check power supply for open phase. Reverse any two legs of power supply. | x | System error | VRV IV | |||||||||||||||||||
| U1[399] | 07 | Reverse phase/open phase of power supply (Slave 2) | •Power supply reverse phase. •T phase open phase. •Defective outdoor unit PCB. |
•Check power supply for open phase. Reverse any two legs of power supply. | x | System error | VRV IV | |||||||||||||||||||
| U1[400] | 08 | Reverse phase of power supply [when power ON] (Slave 2) | •Power
supply reverse phase. •T phase open phase. •Defective outdoor unit PCB. |
•Check power supply for open phase. Reverse any two legs of power supply. | x | System error | VRV IV | |||||||||||||||||||
| U2[401] | 0x92 | Low-voltage Detection or Over-voltage Detection | •Power supply voltage is not as
specified. •Defective DC voltage detection circuit. •Defective over-voltage detection circuit. •Defective PAM control part. •Disconnection of compressor harness. •Short circuit inside the fan motor winding. •Noise. •Momentary drop of voltage. •Momentary power failure. •Defective outdoor unit PCB. •Defective indoor unit PCB. •Instantaneous power failure. •Defective outdoor service monitor PCB. |
x | REYQ-T | System error | RA, VRV | U2 | ||||||||||||||||||
| U2[402] | 01 | Shortage of inverter 1 power supply voltage (Master) | •Abnormal
power supply voltage. •Instantaneous power failure. •Open phase. •Defective inverter PCB. •Defective control PCB. •Defective compressor. •Defective main circuit wiring. •Defective fan motor. •Defective connection of signal cable. |
•Make
a diagnosis of the relevant unit based on the following: •Shortage of power supply voltage. •If the other units detect shortage of power supply voltage, power supply voltage during operation may be unstable. Check the power supply condition. •If a particular unit detects the error, operation of 52C may bedefective. Follow the U2 flowchart. •Open phase of power supply. •The wiring between power supply and inverter PCB may be disconnected. Check that power supply is connected to terminal block, terminal block is connected to PCB without broken wire or disconnection, and reactor wiring is secured. If no abnormality is found, follow the U2 flowchart. •Defective capacitor in main circuit. •P-N on the inverter PCB (electrolytic capacitor, power module) may be damaged and short circuited. Operation of current limiting relay may be defective or the wiring between the reactor and PCB may be disconnected. Measure the resistance between P-N on the inverter PCB and check for short circuit. If no abnormality is found, follow the U2 flowchart. |
x | VRV IV | ||||||||||||||||||||
| U2[403] | 02 | Open phase of inverter 1 power supply (Master) | •Abnormal power supply
voltage. •Instantaneous power failure. •Open phase. •Defective inverter PCB. •Defective control PCB. •Defective compressor. •Defective main circuit wiring. •Defective fan motor. •Defective connection of signal cable. |
•Make a diagnosis of the relevant
unit based on the following: •Shortage of power supply voltage. •If the other units detect shortage of power supply voltage, power supply voltage during operation may be unstable. Check the power supply condition. •If a particular unit detects the error, operation of 52C may bedefective. Follow the U2 flowchart. •Open phase of power supply. •The wiring between power supply and inverter PCB may be disconnected. Check that power supply is connected to terminal block, terminal block is connected to PCB without broken wire or disconnection, and reactor wiring is secured. If no abnormality is found, follow the U2 flowchart. •Defective capacitor in main circuit. •P-N on the inverter PCB (electrolytic capacitor, power module) may be damaged and short circuited. Operation of current limiting relay may be defective or the wiring between the reactor and PCB may be disconnected. Measure the resistance between P-N on the inverter PCB and check for short circuit. If no abnormality is found, follow the U2 flowchart. |
x | VRV IV | ||||||||||||||||||||
| U2[404] | 03 | Defective capacitor in inverter 1 main circuit (Master) | •Abnormal
power supply voltage. •Instantaneous power failure. •Open phase. •Defective inverter PCB. •Defective control PCB. •Defective compressor. •Defective main circuit wiring. •Defective fan motor. •Defective connection of signal cable. |
•Make
a diagnosis of the relevant unit based on the following: •Shortage of power supply voltage. •If the other units detect shortage of power supply voltage, power supply voltage during operation may be unstable. Check the power supply condition. •If a particular unit detects the error, operation of 52C may bedefective. Follow the U2 flowchart. •Open phase of power supply. •The wiring between power supply and inverter PCB may be disconnected. Check that power supply is connected to terminal block, terminal block is connected to PCB without broken wire or disconnection, and reactor wiring is secured. If no abnormality is found, follow the U2 flowchart. •Defective capacitor in main circuit. •P-N on the inverter PCB (electrolytic capacitor, power module) may be damaged and short circuited. Operation of current limiting relay may be defective or the wiring between the reactor and PCB may be disconnected. Measure the resistance between P-N on the inverter PCB and check for short circuit. If no abnormality is found, follow the U2 flowchart. |
x | VRV IV | ||||||||||||||||||||
| U2[405] | 08 | Shortage of inverter 1 power supply voltage (Slave 1) | •Abnormal power supply
voltage. •Instantaneous power failure. •Open phase. •Defective inverter PCB. •Defective control PCB. •Defective compressor. •Defective main circuit wiring. •Defective fan motor. •Defective connection of signal cable. |
•Make a diagnosis of the relevant
unit based on the following: •Shortage of power supply voltage. •If the other units detect shortage of power supply voltage, power supply voltage during operation may be unstable. Check the power supply condition. •If a particular unit detects the error, operation of 52C may bedefective. Follow the U2 flowchart. •Open phase of power supply. •The wiring between power supply and inverter PCB may be disconnected. Check that power supply is connected to terminal block, terminal block is connected to PCB without broken wire or disconnection, and reactor wiring is secured. If no abnormality is found, follow the U2 flowchart. •Defective capacitor in main circuit. •P-N on the inverter PCB (electrolytic capacitor, power module) may be damaged and short circuited. Operation of current limiting relay may be defective or the wiring between the reactor and PCB may be disconnected. Measure the resistance between P-N on the inverter PCB and check for short circuit. If no abnormality is found, follow the U2 flowchart. |
x | VRV IV | ||||||||||||||||||||
| U2[406] | 09 | Open phase of inverter 1 power supply (Slave 1) | •Abnormal
power supply voltage. •Instantaneous power failure. •Open phase. •Defective inverter PCB. •Defective control PCB. •Defective compressor. •Defective main circuit wiring. •Defective fan motor. •Defective connection of signal cable. |
•Make
a diagnosis of the relevant unit based on the following: •Shortage of power supply voltage. •If the other units detect shortage of power supply voltage, power supply voltage during operation may be unstable. Check the power supply condition. •If a particular unit detects the error, operation of 52C may bedefective. Follow the U2 flowchart. •Open phase of power supply. •The wiring between power supply and inverter PCB may be disconnected. Check that power supply is connected to terminal block, terminal block is connected to PCB without broken wire or disconnection, and reactor wiring is secured. If no abnormality is found, follow the U2 flowchart. •Defective capacitor in main circuit. •P-N on the inverter PCB (electrolytic capacitor, power module) may be damaged and short circuited. Operation of current limiting relay may be defective or the wiring between the reactor and PCB may be disconnected. Measure the resistance between P-N on the inverter PCB and check for short circuit. If no abnormality is found, follow the U2 flowchart. |
x | VRV IV | ||||||||||||||||||||
| U2[407] | 10 | Defective capacitor in inverter 1 main circuit (Slave 1) | •Abnormal power supply
voltage. •Instantaneous power failure. •Open phase. •Defective inverter PCB. •Defective control PCB. •Defective compressor. •Defective main circuit wiring. •Defective fan motor. •Defective connection of signal cable. |
•Make a diagnosis of the relevant
unit based on the following: •Shortage of power supply voltage. •If the other units detect shortage of power supply voltage, power supply voltage during operation may be unstable. Check the power supply condition. •If a particular unit detects the error, operation of 52C may bedefective. Follow the U2 flowchart. •Open phase of power supply. •The wiring between power supply and inverter PCB may be disconnected. Check that power supply is connected to terminal block, terminal block is connected to PCB without broken wire or disconnection, and reactor wiring is secured. If no abnormality is found, follow the U2 flowchart. •Defective capacitor in main circuit. •P-N on the inverter PCB (electrolytic capacitor, power module) may be damaged and short circuited. Operation of current limiting relay may be defective or the wiring between the reactor and PCB may be disconnected. Measure the resistance between P-N on the inverter PCB and check for short circuit. If no abnormality is found, follow the U2 flowchart. |
x | VRV IV | ||||||||||||||||||||
| U2[408] | 11 | Shortage of inverter 1 power supply voltage (Slave 2) | •Abnormal
power supply voltage. •Instantaneous power failure. •Open phase. •Defective inverter PCB. •Defective control PCB. •Defective compressor. •Defective main circuit wiring. •Defective fan motor. •Defective connection of signal cable. |
•Make
a diagnosis of the relevant unit based on the following: •Shortage of power supply voltage. •If the other units detect shortage of power supply voltage, power supply voltage during operation may be unstable. Check the power supply condition. •If a particular unit detects the error, operation of 52C may bedefective. Follow the U2 flowchart. •Open phase of power supply. •The wiring between power supply and inverter PCB may be disconnected. Check that power supply is connected to terminal block, terminal block is connected to PCB without broken wire or disconnection, and reactor wiring is secured. If no abnormality is found, follow the U2 flowchart. •Defective capacitor in main circuit. •P-N on the inverter PCB (electrolytic capacitor, power module) may be damaged and short circuited. Operation of current limiting relay may be defective or the wiring between the reactor and PCB may be disconnected. Measure the resistance between P-N on the inverter PCB and check for short circuit. If no abnormality is found, follow the U2 flowchart. |
x | VRV IV | ||||||||||||||||||||
| U2[409] | 12 | Open phase of inverter 1 power supply (Slave 2) | •Abnormal power supply
voltage. •Instantaneous power failure. •Open phase. •Defective inverter PCB. •Defective control PCB. •Defective compressor. •Defective main circuit wiring. •Defective fan motor. •Defective connection of signal cable. |
•Make a diagnosis of the relevant
unit based on the following: •Shortage of power supply voltage. •If the other units detect shortage of power supply voltage, power supply voltage during operation may be unstable. Check the power supply condition. •If a particular unit detects the error, operation of 52C may bedefective. Follow the U2 flowchart. •Open phase of power supply. •The wiring between power supply and inverter PCB may be disconnected. Check that power supply is connected to terminal block, terminal block is connected to PCB without broken wire or disconnection, and reactor wiring is secured. If no abnormality is found, follow the U2 flowchart. •Defective capacitor in main circuit. •P-N on the inverter PCB (electrolytic capacitor, power module) may be damaged and short circuited. Operation of current limiting relay may be defective or the wiring between the reactor and PCB may be disconnected. Measure the resistance between P-N on the inverter PCB and check for short circuit. If no abnormality is found, follow the U2 flowchart. |
x | VRV IV | ||||||||||||||||||||
| U2[410] | 13 | Defective capacitor in inverter 1 main circuit (Slave 2) | •Abnormal
power supply voltage. •Instantaneous power failure. •Open phase. •Defective inverter PCB. •Defective control PCB. •Defective compressor. •Defective main circuit wiring. •Defective fan motor. •Defective connection of signal cable. |
•Make
a diagnosis of the relevant unit based on the following: •Shortage of power supply voltage. •If the other units detect shortage of power supply voltage, power supply voltage during operation may be unstable. Check the power supply condition. •If a particular unit detects the error, operation of 52C may bedefective. Follow the U2 flowchart. •Open phase of power supply. •The wiring between power supply and inverter PCB may be disconnected. Check that power supply is connected to terminal block, terminal block is connected to PCB without broken wire or disconnection, and reactor wiring is secured. If no abnormality is found, follow the U2 flowchart. •Defective capacitor in main circuit. •P-N on the inverter PCB (electrolytic capacitor, power module) may be damaged and short circuited. Operation of current limiting relay may be defective or the wiring between the reactor and PCB may be disconnected. Measure the resistance between P-N on the inverter PCB and check for short circuit. If no abnormality is found, follow the U2 flowchart. |
x | VRV IV | ||||||||||||||||||||
| U2[411] | 22 | Shortage of inverter 2 power supply voltage (Master) | •Abnormal power supply
voltage. •Instantaneous power failure. •Open phase. •Defective inverter PCB. •Defective control PCB. •Defective compressor. •Defective main circuit wiring. •Defective fan motor. •Defective connection of signal cable. |
•Make a diagnosis of the relevant
unit based on the following: •Shortage of power supply voltage. •If the other units detect shortage of power supply voltage, power supply voltage during operation may be unstable. Check the power supply condition. •If a particular unit detects the error, operation of 52C may bedefective. Follow the U2 flowchart. •Open phase of power supply. •The wiring between power supply and inverter PCB may be disconnected. Check that power supply is connected to terminal block, terminal block is connected to PCB without broken wire or disconnection, and reactor wiring is secured. If no abnormality is found, follow the U2 flowchart. •Defective capacitor in main circuit. •P-N on the inverter PCB (electrolytic capacitor, power module) may be damaged and short circuited. Operation of current limiting relay may be defective or the wiring between the reactor and PCB may be disconnected. Measure the resistance between P-N on the inverter PCB and check for short circuit. If no abnormality is found, follow the U2 flowchart. |
x | VRV IV | ||||||||||||||||||||
| U2[412] | 23 | Open phase of inverter 2 power supply (Master) | •Abnormal
power supply voltage. •Instantaneous power failure. •Open phase. •Defective inverter PCB. •Defective control PCB. •Defective compressor. •Defective main circuit wiring. •Defective fan motor. •Defective connection of signal cable. |
•Make
a diagnosis of the relevant unit based on the following: •Shortage of power supply voltage. •If the other units detect shortage of power supply voltage, power supply voltage during operation may be unstable. Check the power supply condition. •If a particular unit detects the error, operation of 52C may bedefective. Follow the U2 flowchart. •Open phase of power supply. •The wiring between power supply and inverter PCB may be disconnected. Check that power supply is connected to terminal block, terminal block is connected to PCB without broken wire or disconnection, and reactor wiring is secured. If no abnormality is found, follow the U2 flowchart. •Defective capacitor in main circuit. •P-N on the inverter PCB (electrolytic capacitor, power module) may be damaged and short circuited. Operation of current limiting relay may be defective or the wiring between the reactor and PCB may be disconnected. Measure the resistance between P-N on the inverter PCB and check for short circuit. If no abnormality is found, follow the U2 flowchart. |
x | VRV IV | ||||||||||||||||||||
| U2[413] | 24 | Defective capacitor in inverter 2 main circuit (Master) | •Abnormal power supply
voltage. •Instantaneous power failure. •Open phase. •Defective inverter PCB. •Defective control PCB. •Defective compressor. •Defective main circuit wiring. •Defective fan motor. •Defective connection of signal cable. |
•Make a diagnosis of the relevant
unit based on the following: •Shortage of power supply voltage. •If the other units detect shortage of power supply voltage, power supply voltage during operation may be unstable. Check the power supply condition. •If a particular unit detects the error, operation of 52C may bedefective. Follow the U2 flowchart. •Open phase of power supply. •The wiring between power supply and inverter PCB may be disconnected. Check that power supply is connected to terminal block, terminal block is connected to PCB without broken wire or disconnection, and reactor wiring is secured. If no abnormality is found, follow the U2 flowchart. •Defective capacitor in main circuit. •P-N on the inverter PCB (electrolytic capacitor, power module) may be damaged and short circuited. Operation of current limiting relay may be defective or the wiring between the reactor and PCB may be disconnected. Measure the resistance between P-N on the inverter PCB and check for short circuit. If no abnormality is found, follow the U2 flowchart. |
x | VRV IV | ||||||||||||||||||||
| U2[414] | 25 | Shortage of inverter 2 power supply voltage (Slave 1) | •Abnormal
power supply voltage. •Instantaneous power failure. •Open phase. •Defective inverter PCB. •Defective control PCB. •Defective compressor. •Defective main circuit wiring. •Defective fan motor. •Defective connection of signal cable. |
•Make
a diagnosis of the relevant unit based on the following: •Shortage of power supply voltage. •If the other units detect shortage of power supply voltage, power supply voltage during operation may be unstable. Check the power supply condition. •If a particular unit detects the error, operation of 52C may bedefective. Follow the U2 flowchart. •Open phase of power supply. •The wiring between power supply and inverter PCB may be disconnected. Check that power supply is connected to terminal block, terminal block is connected to PCB without broken wire or disconnection, and reactor wiring is secured. If no abnormality is found, follow the U2 flowchart. •Defective capacitor in main circuit. •P-N on the inverter PCB (electrolytic capacitor, power module) may be damaged and short circuited. Operation of current limiting relay may be defective or the wiring between the reactor and PCB may be disconnected. Measure the resistance between P-N on the inverter PCB and check for short circuit. If no abnormality is found, follow the U2 flowchart. |
x | VRV IV | ||||||||||||||||||||
| U2[415] | 26 | Open phase of inverter 2 power supply (Slave 1) | •Abnormal power supply
voltage. •Instantaneous power failure. •Open phase. •Defective inverter PCB. •Defective control PCB. •Defective compressor. •Defective main circuit wiring. •Defective fan motor. •Defective connection of signal cable. |
•Make a diagnosis of the relevant
unit based on the following: •Shortage of power supply voltage. •If the other units detect shortage of power supply voltage, power supply voltage during operation may be unstable. Check the power supply condition. •If a particular unit detects the error, operation of 52C may bedefective. Follow the U2 flowchart. •Open phase of power supply. •The wiring between power supply and inverter PCB may be disconnected. Check that power supply is connected to terminal block, terminal block is connected to PCB without broken wire or disconnection, and reactor wiring is secured. If no abnormality is found, follow the U2 flowchart. •Defective capacitor in main circuit. •P-N on the inverter PCB (electrolytic capacitor, power module) may be damaged and short circuited. Operation of current limiting relay may be defective or the wiring between the reactor and PCB may be disconnected. Measure the resistance between P-N on the inverter PCB and check for short circuit. If no abnormality is found, follow the U2 flowchart. |
x | VRV IV | ||||||||||||||||||||
| U2[416] | 27 | Defective capacitor in inverter 2 main circuit (Slave 1) | •Abnormal
power supply voltage. •Instantaneous power failure. •Open phase. •Defective inverter PCB. •Defective control PCB. •Defective compressor. •Defective main circuit wiring. •Defective fan motor. •Defective connection of signal cable. |
•Make
a diagnosis of the relevant unit based on the following: •Shortage of power supply voltage. •If the other units detect shortage of power supply voltage, power supply voltage during operation may be unstable. Check the power supply condition. •If a particular unit detects the error, operation of 52C may bedefective. Follow the U2 flowchart. •Open phase of power supply. •The wiring between power supply and inverter PCB may be disconnected. Check that power supply is connected to terminal block, terminal block is connected to PCB without broken wire or disconnection, and reactor wiring is secured. If no abnormality is found, follow the U2 flowchart. •Defective capacitor in main circuit. •P-N on the inverter PCB (electrolytic capacitor, power module) may be damaged and short circuited. Operation of current limiting relay may be defective or the wiring between the reactor and PCB may be disconnected. Measure the resistance between P-N on the inverter PCB and check for short circuit. If no abnormality is found, follow the U2 flowchart. |
x | VRV IV | ||||||||||||||||||||
| U2[417] | 28 | Shortage of inverter 2 power supply voltage (Slave 2) | •Abnormal power supply
voltage. •Instantaneous power failure. •Open phase. •Defective inverter PCB. •Defective control PCB. •Defective compressor. •Defective main circuit wiring. •Defective fan motor. •Defective connection of signal cable. |
•Make a diagnosis of the relevant
unit based on the following: •Shortage of power supply voltage. •If the other units detect shortage of power supply voltage, power supply voltage during operation may be unstable. Check the power supply condition. •If a particular unit detects the error, operation of 52C may bedefective. Follow the U2 flowchart. •Open phase of power supply. •The wiring between power supply and inverter PCB may be disconnected. Check that power supply is connected to terminal block, terminal block is connected to PCB without broken wire or disconnection, and reactor wiring is secured. If no abnormality is found, follow the U2 flowchart. •Defective capacitor in main circuit. •P-N on the inverter PCB (electrolytic capacitor, power module) may be damaged and short circuited. Operation of current limiting relay may be defective or the wiring between the reactor and PCB may be disconnected. Measure the resistance between P-N on the inverter PCB and check for short circuit. If no abnormality is found, follow the U2 flowchart. |
x | VRV IV | ||||||||||||||||||||
| U2[418] | 29 | Open phase of inverter 2 power supply (Slave 2) | •Abnormal
power supply voltage. •Instantaneous power failure. •Open phase. •Defective inverter PCB. •Defective control PCB. •Defective compressor. •Defective main circuit wiring. •Defective fan motor. •Defective connection of signal cable. |
•Make
a diagnosis of the relevant unit based on the following: •Shortage of power supply voltage. •If the other units detect shortage of power supply voltage, power supply voltage during operation may be unstable. Check the power supply condition. •If a particular unit detects the error, operation of 52C may bedefective. Follow the U2 flowchart. •Open phase of power supply. •The wiring between power supply and inverter PCB may be disconnected. Check that power supply is connected to terminal block, terminal block is connected to PCB without broken wire or disconnection, and reactor wiring is secured. If no abnormality is found, follow the U2 flowchart. •Defective capacitor in main circuit. •P-N on the inverter PCB (electrolytic capacitor, power module) may be damaged and short circuited. Operation of current limiting relay may be defective or the wiring between the reactor and PCB may be disconnected. Measure the resistance between P-N on the inverter PCB and check for short circuit. If no abnormality is found, follow the U2 flowchart. |
x | VRV IV | ||||||||||||||||||||
| U2[419] | 30 | Defective capacitor in inverter 2 main circuit (Slave 2) | •Abnormal power supply
voltage. •Instantaneous power failure. •Open phase. •Defective inverter PCB. •Defective control PCB. •Defective compressor. •Defective main circuit wiring. •Defective fan motor. •Defective connection of signal cable. |
•Make a diagnosis of the relevant
unit based on the following: •Shortage of power supply voltage. •If the other units detect shortage of power supply voltage, power supply voltage during operation may be unstable. Check the power supply condition. •If a particular unit detects the error, operation of 52C may bedefective. Follow the U2 flowchart. •Open phase of power supply. •The wiring between power supply and inverter PCB may be disconnected. Check that power supply is connected to terminal block, terminal block is connected to PCB without broken wire or disconnection, and reactor wiring is secured. If no abnormality is found, follow the U2 flowchart. •Defective capacitor in main circuit. •P-N on the inverter PCB (electrolytic capacitor, power module) may be damaged and short circuited. Operation of current limiting relay may be defective or the wiring between the reactor and PCB may be disconnected. Measure the resistance between P-N on the inverter PCB and check for short circuit. If no abnormality is found, follow the U2 flowchart. |
x | VRV IV | ||||||||||||||||||||
| U2[420] | 36 | Fan motor 1 undervoltage (Master) | •Abnormal
power supply voltage. •Instantaneous power failure. •Open phase. •Defective inverter PCB. •Defective control PCB. •Defective compressor. •Defective main circuit wiring. •Defective fan motor. •Defective connection of signal cable. |
•Make
a diagnosis of the relevant unit based on the following: •Shortage of power supply voltage. •If the other units detect shortage of power supply voltage, power supply voltage during operation may be unstable. Check the power supply condition. •If a particular unit detects the error, operation of 52C may bedefective. Follow the U2 flowchart. •Open phase of power supply. •The wiring between power supply and inverter PCB may be disconnected. Check that power supply is connected to terminal block, terminal block is connected to PCB without broken wire or disconnection, and reactor wiring is secured. If no abnormality is found, follow the U2 flowchart. •Defective capacitor in main circuit. •P-N on the inverter PCB (electrolytic capacitor, power module) may be damaged and short circuited. Operation of current limiting relay may be defective or the wiring between the reactor and PCB may be disconnected. Measure the resistance between P-N on the inverter PCB and check for short circuit. If no abnormality is found, follow the U2 flowchart. |
x | VRV IV | ||||||||||||||||||||
| U2[421] | 37 | Fan motor 1 undervoltage (Slave 1) | •Abnormal power supply
voltage. •Instantaneous power failure. •Open phase. •Defective inverter PCB. •Defective control PCB. •Defective compressor. •Defective main circuit wiring. •Defective fan motor. •Defective connection of signal cable. |
•Make a diagnosis of the relevant
unit based on the following: •Shortage of power supply voltage. •If the other units detect shortage of power supply voltage, power supply voltage during operation may be unstable. Check the power supply condition. •If a particular unit detects the error, operation of 52C may bedefective. Follow the U2 flowchart. •Open phase of power supply. •The wiring between power supply and inverter PCB may be disconnected. Check that power supply is connected to terminal block, terminal block is connected to PCB without broken wire or disconnection, and reactor wiring is secured. If no abnormality is found, follow the U2 flowchart. •Defective capacitor in main circuit. •P-N on the inverter PCB (electrolytic capacitor, power module) may be damaged and short circuited. Operation of current limiting relay may be defective or the wiring between the reactor and PCB may be disconnected. Measure the resistance between P-N on the inverter PCB and check for short circuit. If no abnormality is found, follow the U2 flowchart. |
x | VRV IV | ||||||||||||||||||||
| U2[422] | 38 | Fan motor 1 undervoltage (Slave 2) | •Abnormal
power supply voltage. •Instantaneous power failure. •Open phase. •Defective inverter PCB. •Defective control PCB. •Defective compressor. •Defective main circuit wiring. •Defective fan motor. •Defective connection of signal cable. |
•Make
a diagnosis of the relevant unit based on the following: •Shortage of power supply voltage. •If the other units detect shortage of power supply voltage, power supply voltage during operation may be unstable. Check the power supply condition. •If a particular unit detects the error, operation of 52C may bedefective. Follow the U2 flowchart. •Open phase of power supply. •The wiring between power supply and inverter PCB may be disconnected. Check that power supply is connected to terminal block, terminal block is connected to PCB without broken wire or disconnection, and reactor wiring is secured. If no abnormality is found, follow the U2 flowchart. •Defective capacitor in main circuit. •P-N on the inverter PCB (electrolytic capacitor, power module) may be damaged and short circuited. Operation of current limiting relay may be defective or the wiring between the reactor and PCB may be disconnected. Measure the resistance between P-N on the inverter PCB and check for short circuit. If no abnormality is found, follow the U2 flowchart. |
x | VRV IV | ||||||||||||||||||||
| [423] | U3[424] | 0x93 | Wiring Error Check Unexecuted | •Wiring Error Check Unexecuted/Check operation not executed | •Verify wiring to all fan coils, turn each fan coil ON one at a time to verify operation. U3 RA Wiring Error Check Final. | x | REYQ-T | System error | System (RA) Multi NM models Only found N series, VRV | U3 | ||||||||||||||||
| U3[425] | 02 | Initial installation alarm / Test operation failed due to indoor unit error | •Check operation not executed. | x | VRV IV | |||||||||||||||||||||
| U3[426] | 03 | Test operation not conducted | •Check operation not executed. | x | VRV IV | |||||||||||||||||||||
| U3[427] | 04 | Abnormal end of test operation | •Check operation not executed. | x | VRV IV | |||||||||||||||||||||
| U3[428] | 05 | Premature end of test operation during initial transmission error – check indoor unit error U4/U9 | •Check operation not executed. | x | VRV IV | |||||||||||||||||||||
| U3[429] | 06 | Premature end of test operation during normal transmission error | •Check operation not executed. | x | VRV IV | |||||||||||||||||||||
| U3[430] | 07 | Premature end of test operation due to transmission error | •Check operation not executed. | x | VRV IV | |||||||||||||||||||||
| U3[431] | 08 | Premature end of test operation due to transmission error of all units | •Check operation not executed. | x | VRV IV | |||||||||||||||||||||
| U4 | Signal Transmission Error (Between Indoor Unit and Outdoor Unit) | •Indoor
to outdoor, outdoor to outdoor transmission wiring F1, F2 disconnection,
short circuit or wrong wiring. •Outdoor unit power supply is OFF. •System address does not match. •Defective indoor unit PCB. •Defective outdoor unit PCB. •Defective high pressure sensor system. •Defective low pressure sensor system. •Incorrect connection of pressure sensor(s). |
x | RA | ||||||||||||||||||||||
| U4[432] | 0x94 | 01 | Transmission error between units | •Open
phase in power supply wiring. •Short circuit in indoor-outdoor or outdoor-outdoor transmission wiring (F1/F2), or wrong wiring. •Outdoor unit power supply is OFF. •System address does not match. •Defective indoor unit control PCB. •Defective outdoor unit main PCB. •Multi-tenant function is ON. |
•Check for 16 VDC on terminals F1-F2 between indoor and outdor units and also verify that BS Box (for HR) or indoor fan coils are not powered down. | x | REYQ-T/All IDU models | Communication error | VRV IV | U4 | ||||||||||||||||
| U4 | 0x94 | 03 | Transmission error between units | •Open phase in power supply
wiring. •Short circuit in indoor-outdoor or outdoor-outdoor transmission wiring (F1/F2), or wrong wiring. •Outdoor unit power supply is OFF. •System address does not match. •Defective indoor unit control PCB. •Defective outdoor unit main PCB. •Multi-tenant function is ON. |
•This fault is generated upon a failure of the test run for the wiring check and can also be generated if an indoor fan coil has an A0 fault code. | x | Communication error | VRV IV | ||||||||||||||||||
| U4 | 15 | Outdoor unable to start test operation because some indoor detects error | •Open
phase in power supply wiring. •Short circuit in indoor-outdoor or outdoor-outdoor transmission wiring (F1/F2), or wrong wiring. •Outdoor unit power supply is OFF. •System address does not match. •Defective indoor unit control PCB. •Defective outdoor unit main PCB. •Multi-tenant function is ON. |
•Test run failure due to a wiring issue. Verify that all fan coils and BS boxes(if HR) are powered up and that all the wiring is connected to the correct terminals . | x | VRV IV | ||||||||||||||||||||
| U5[433] | 0x95 | Transmission error between IDU & remote/Malfunction of transmission between Hydrolic compartment and remote controller | •Transmission
error between indoor unit and remote controller. •Connection of 2 main remote controllers (when using 2 remote controllers). •Defective indoor unit control PCB. •Defective remote controller PCB. •Transmission error caused by noise. |
•Reference Main.Sub Setting Final. | x | All IDU models | Communication error | Altherma MonoBloc, VRV, RA, Skyair | U5 | |||||||||||||||||
| U6[434] | 0x96 | Transmission error between IDU master and slave | x | System error | U6 | |||||||||||||||||||||
| U7 | 0x97 | Transmission error between ODU's | •Connection
error of transmission wirings between outdoor unit and external control
adaptor for outdoor unit. •Connection error of transmission wirings between outdoor units. •Cool/Heat selection setting error. •Cool/Heat unified address setting error (functional unit, external control adaptor for outdoor unit). • Defective outdoor unit PCB. • Defective external control adaptor for outdoor unit. |
x | Communication error | System (VRV) | ||||||||||||||||||||
| U7 | 0x97 | 01 | Transmission error when the external control adaptor is mounted | •Connection
error of transmission wirings between outdoor unit and external control
adaptor for outdoor unit. •Connection error of transmission wirings between outdoor units. •Cool/Heat selection setting error. •Cool/Heat unified address setting error (functional unit, external control adaptor for outdoor unit). •Defective outdoor unit PCB. •Defective external control adaptor for outdoor unit. |
x | Communication error | VRV IV | |||||||||||||||||||
| U7 | 0x97 | 02 | Transmission error when the external control adaptor is mounted | •Connection error of transmission
wirings between outdoor unit and external control adaptor for outdoor
unit. •Connection error of transmission wirings between outdoor units. •Cool/Heat selection setting error. •Cool/Heat unified address setting error (functional unit, external control adaptor for outdoor unit). •Defective outdoor unit PCB. •Defective external control adaptor for outdoor unit. |
•Communication fault on the Master unit…Make sure H3P light is solid in VRV2 and 3 models and that mode 2.00 on VRV4 is set to a value of zero. | x | Communication error | VRV IV | ||||||||||||||||||
| U7 | 0x97 | 03 | Transmission error between master & slave 1 | •Connection
error of transmission wirings between outdoor unit and external control
adaptor for outdoor unit. •Connection error of transmission wirings between outdoor units. •Cool/Heat selection setting error. •Cool/Heat unified address setting error (functional unit, external control adaptor for outdoor unit). •Defective outdoor unit PCB. •Defective external control adaptor for outdoor unit. |
•Verify power on the slave unit and that Q1-Q2 connection between master unit and slave 1 unit and also verify that the heat/cool changeover has not been changed. | x | Communication error | VRV IV | ||||||||||||||||||
| U7 | 0x97 | 04 | Transmission error between master & slave 2 | •Connection error of transmission
wirings between outdoor unit and external control adaptor for outdoor
unit. •Connection error of transmission wirings between outdoor units. •Cool/Heat selection setting error. •Cool/Heat unified address setting error (functional unit, external control adaptor for outdoor unit). •Defective outdoor unit PCB. •Defective external control adaptor for outdoor unit. |
•Verify power on the slave unit and that Q1-Q2 connection between master unit and slave 1 unit and also verify that the heat/cool changeover has not been changed. | x | Communication error | VRV IV | ||||||||||||||||||
| U7 | 0x97 | 05 | Multi system error | •Connection
error of transmission wirings between outdoor unit and external control
adaptor for outdoor unit. •Connection error of transmission wirings between outdoor units. •Cool/Heat selection setting error. •Cool/Heat unified address setting error (functional unit, external control adaptor for outdoor unit). •Defective outdoor unit PCB. •Defective external control adaptor for outdoor unit. |
•Verify that there is nothing on Q1/Q2 on this single module system. | x | Communication error | VRV IV | ||||||||||||||||||
| U7 | 0x97 | 06 | Manual address setting error for slave 1,2 | •Connection error of transmission
wirings between outdoor unit and external control adaptor for outdoor
unit. •Connection error of transmission wirings between outdoor units. •Cool/Heat selection setting error. •Cool/Heat unified address setting error (functional unit, external control adaptor for outdoor unit). •Defective outdoor unit PCB. •Defective external control adaptor for outdoor unit. |
•Check
the slave units manual address is set correctly: 0: outdoor unit is master unit 1: outdoor unit is sub 1 unit 2: outdoor unit is sub 2 unit |
x | Communication error | VRV IV | ||||||||||||||||||
| U7 | 0x97 | 07 | 4 or more ODU's connected to the same system | •Connection
error of transmission wirings between outdoor unit and external control
adaptor for outdoor unit. •Connection error of transmission wirings between outdoor units. •Cool/Heat selection setting error. •Cool/Heat unified address setting error (functional unit, external control adaptor for outdoor unit). •Defective outdoor unit PCB. •Defective external control adaptor for outdoor unit. |
•Max module connection for ODU's is 3--This error code recognizes more than the 3 required. Fix the wiring issue and reset. | x | Communication error | VRV IV | ||||||||||||||||||
| U7 | 0x97 | 11 | Connection of excess IDU's for test operation | •Connection error of transmission
wirings between outdoor unit and external control adaptor for outdoor
unit. •Connection error of transmission wirings between outdoor units. •Cool/Heat selection setting error. •Cool/Heat unified address setting error (functional unit, external control adaptor for outdoor unit). •Defective outdoor unit PCB. •Defective external control adaptor for outdoor unit. |
•Indoor unit connection ratio is higher than the 200% maximum allowed. | x | Communication error | VRV IV | ||||||||||||||||||
| U7 | 0x97 | 24 | Branch selector communication error | •Connection
error of transmission wirings between outdoor unit and external control
adaptor for outdoor unit. •Connection error of transmission wirings between outdoor units. •Cool/Heat selection setting error. •Cool/Heat unified address setting error (functional unit, external control adaptor for outdoor unit). •Defective outdoor unit PCB. •Defective external control adaptor for outdoor unit. |
x | Communication error | VRV IV | |||||||||||||||||||
| U8[435] | 0x98 | Transmission error between remote controllers | •No
communication between remote controllers. •Defect of remote controller main/sub setting. •Defect of remote controller wiring. •Defect of remote controller PCB. |
x | All IDU models | Communication error | System (RA, SkyAir, VRV) |
U8 | ||||||||||||||||||
| [436] | U9[437] | 0x99 | Transmission error between same system units | •Defect
of communication between other indoor unit and condensing unit. •Other indoor unit electronic expansion valve failure. |
x | REYQ-T/All IDU models | Communication error | System (VRV) | U9 | |||||||||||||||||
| U9 | 01 | Other indoor units abnormality | •Transmission error between other indoor and outdoor
units. •Defective electronic expansion valve of other indoor unit. •Defective indoor unit PCB of other indoor unit. •Locate indoor unit with an error code other than U9 and repair. |
•Look for error code on indoor unit that is NOT U9. Resolve that error code and the U9s will reset. | Communication error | VRV IV | ||||||||||||||||||||
| UA | 0x9A | Unspecified Voltage (Between Indoor Unit and Outdoor Unit) or Malfunctioning field setting switch/Malfunctioning field setting switch/Incorrect Gas Furnace Connecting Number | •Wrong
models interconnected. •Wrong wiring of connecting wires. •Wrong indoor unit PCB or outdoor unit PCB mounted. •Defective indoor unit PCB. •Defective outdoor unit PCB. •Change to be the system that one "CXTQ-TA + gas furnace" and other indoor units other than CXTQ-TA are connected. •The error code UA is displayed on the remote controller. •Uncanceled service condensing. •Excess of connected indoor units. •Defect of hydraulic compartment or compressor compartment PCB •Defect of power supply PCB. •Defect of remote controller wiring. |
x | System error | System (VRV), CXTQ-TA, Altherma MonoBloc, RA | ||||||||||||||||||||
| UA | 0x9A | 03 | Defective number of indoor units connection | •Excess of connected indoor
units. •Defective outdoor unit PCB. •Mismatch of the refrigerant type of indoor and outdoor unit. •Setting of outdoor unit PCB was not carried out after replacing to spare PCB. |
x | System error | VRV IV | |||||||||||||||||||
| UA | 0x9A | 16 | Defective system connection | •Excess
of connected indoor units. •Defective outdoor unit PCB. •Mismatch of the refrigerant type of indoor and outdoor unit. •Setting of outdoor unit PCB was not carried out after replacing to spare PCB. |
x | System error | VRV IV | |||||||||||||||||||
| UA[438] | 0x9A | 17 | Connection of excess IDU's or Incorrect Electric Heater Capacity Setting/Incorrect Electric Heater Capacity Setting. | •The error code UA-17 is displayed
on the remote controller. •Indoor units can operate continuously. •Incorrect setting is kept. •Even if the ON condition for electric heater 2 is established, only electric heater 1 will be set to ON. •(Electric heater 1 set to ON, electric heater 2 set to OFF). •(In order to deliver in terms of user-friendliness and safety, the electric heater can operate at the lowest possible power levels.). •The airflow of the fan during operation of the electric heater will be set to the largest value within the CFM dictated by the capacity of each of the electric heaters (electric heater 1, electric heater 2 both set to ON). •All other operations are the same as during normal operation. •Excess of connected indoor units. •Defective outdoor unit PCB. •Mismatch of the refrigerant type of indoor and outdoor unit. •Setting of outdoor unit PCB was not carried out after replacing to spare PCB. |
x | REYQ-T/All IDU models | System error | VRV IV | UA | |||||||||||||||||
| UA | 0x9A | 18 | Connection of incorrect models of IDU's | •Excess
of connected indoor units. •Defective outdoor unit PCB. •Mismatch of the refrigerant type of indoor and outdoor unit. •Setting of outdoor unit PCB was not carried out after replacing to spare PCB. |
•Follow the correct flow chart. | x | REYQ-T/All IDU models | System error | VRV IV | |||||||||||||||||
| UA | 0x9A | 20 | Wrong combination of ODU's | •Excess of connected indoor
units. •Defective outdoor unit PCB. •Mismatch of the refrigerant type of indoor and outdoor unit. •Setting of outdoor unit PCB was not carried out after replacing to spare PCB. |
•Follow the correct flow chart. | x | REYQ-T/All IDU models | System error | VRV IV | |||||||||||||||||
| UA | 0x9A | 21 | Wrong connection | •Excess
of connected indoor units. •Defective outdoor unit PCB. •Mismatch of the refrigerant type of indoor and outdoor unit. •Setting of outdoor unit PCB was not carried out after replacing to spare PCB. |
•Follow the correct flow chart. | x | REYQ-T/All IDU models | System error | VRV IV | |||||||||||||||||
| UA | 0x9A | 23 | Connection of excessive Branch Selector units | •Excess of connected indoor
units. •Defective outdoor unit PCB. •Mismatch of the refrigerant type of indoor and outdoor unit. •Setting of outdoor unit PCB was not carried out after replacing to spare PCB. |
•Follow the correct flow chart. | x | System error | VRV IV | ||||||||||||||||||
| UA | 0x9A | 25 | Defective connection between outdoor unit and Branch Selector unit | •Excess
of connected indoor units. •Defective outdoor unit PCB. •Mismatch of the refrigerant type of indoor and outdoor unit. •Setting of outdoor unit PCB was not carried out after replacing to spare PCB. |
•Follow the correct flow chart. | x | System error | VRV IV | ||||||||||||||||||
| UA | 0x9A | 26 | Defective connection between Branch Selector units | •Excess of connected indoor
units. •Defective outdoor unit PCB. •Mismatch of the refrigerant type of indoor and outdoor unit. •Setting of outdoor unit PCB was not carried out after replacing to spare PCB. |
•Follow the correct flow chart. | x | System error | VRV IV | ||||||||||||||||||
| UA | 0x9A | 27 | Error of the number of connected Branch Selector and outdoor units | •Excess
of connected indoor units. •Defective outdoor unit PCB. •Mismatch of the refrigerant type of indoor and outdoor unit. •Setting of outdoor unit PCB was not carried out after replacing to spare PCB. |
•Follow the correct flow chart. | x | System error | VRV IV | ||||||||||||||||||
| UA | 0x9A | 28 | Wrong Branch Selector unit model connected | •Excess of connected indoor
units. •Defective outdoor unit PCB. •Mismatch of the refrigerant type of indoor and outdoor unit. •Setting of outdoor unit PCB was not carried out after replacing to spare PCB. |
•Follow the correct flow chart. | x | System error | VRV IV | ||||||||||||||||||
| UA | 0x9A | 29 | Branch selector BSVQ-P connected to heat pump system | •Excess
of connected indoor units. •Defective outdoor unit PCB. •Mismatch of the refrigerant type of indoor and outdoor unit. •Setting of outdoor unit PCB was not carried out after replacing to spare PCB. |
•Verify BS box is correct size. | x | System error | VRV IV | ||||||||||||||||||
| UA | 0x9A | 31 | Multi system combination error | •Excess of connected indoor
units. •Defective outdoor unit PCB. •Mismatch of the refrigerant type of indoor and outdoor unit. •Setting of outdoor unit PCB was not carried out after replacing to spare PCB. |
•Follow the correct flow chart. | x | REYQ-T/All IDU models | System error | VRV IV | |||||||||||||||||
| UA | 0x9A | 38 | Daikin Altherma indoor unit detected | •Excess
of connected indoor units. •Defective outdoor unit PCB. •Mismatch of the refrigerant type of indoor and outdoor unit. •Setting of outdoor unit PCB was not carried out after replacing to spare PCB. |
•Check outdoor units conneded to make sure they are compattable. If PCB has been changed set dip swiches. | x | System error | VRV IV | ||||||||||||||||||
| UA | 0x9A | 39 | Other hydrobox type than HXY-A unit detected | •Excess of connected indoor
units. •Defective outdoor unit PCB. •Mismatch of the refrigerant type of indoor and outdoor unit. •Setting of outdoor unit PCB was not carried out after replacing to spare PCB. |
x | System error | VRV IV | |||||||||||||||||||
| UA | 0x9A | 50 | RA connected to BP units and HXY-A unit detected | •Excess
of connected indoor units. •Defective outdoor unit PCB. •Mismatch of the refrigerant type of indoor and outdoor unit. •Setting of outdoor unit PCB was not carried out after replacing to spare PCB. |
x | System error | VRV IV | |||||||||||||||||||
| UA | 0x9A | 51 | Only HXY-a unit(s) connected, minimum 50% DX indoor need | •Excess of connected indoor
units. •Defective outdoor unit PCB. •Mismatch of the refrigerant type of indoor and outdoor unit. •Setting of outdoor unit PCB was not carried out after replacing to spare PCB. |
x | System error | VRV IV | |||||||||||||||||||
| UA | 0x9A | 53 | Branch Selector unit DIP switch settings error (Centralized type) | •Excess
of connected indoor units. •Defective outdoor unit PCB. •Mismatch of the refrigerant type of indoor and outdoor unit. •Setting of outdoor unit PCB was not carried out after replacing to spare PCB. |
•Follow the correct flow chart. | x | System error | VRV IV | ||||||||||||||||||
| [439] | UH[440] | 0x9B | Anti-icing Control in Other Rooms or Refrigerant System Address Undefined | •Anti-icing
function in other rooms. •Power supply voltage is not as specified. •Wrong models interconnected. •Wrong indoor unit PCB or outdoor unit PCB mounted. •Improper connection of transmission wiring between indoor-outdoor units and outdoor-outdoor units. •Defective indoor unit control PCB. •Defective outdoor unit main PCB (A1P). |
•Verify wiring to all fan coils,
turn each fan coil ON one at a time to verify operation. Refer A5 RA
Final. •Need to verify f1 f2 wiring, make sure indoor unit is powerd up with correct voltage. |
x | System error | RA Multi, VRV | UH(B) | |||||||||||||||||
| UH[441] | 0x9B | 01 | System Abnormality, Refrigerant System Address Undefined | •Improper
connection of transmission wiring between indoor-outdoor units and
outdoor-outdoor units. •Defective indoor unit control PCB. •Defective outdoor unit main PCB (A1P). |
•This is stating that no address on an idoor unit PCB has been received from outdoor unit. Treat like a U4 error on an indoor unit. | x | System error | VRV IV | ||||||||||||||||||
| UH[442] | 0x9B | 05 | Climate Talk Communication system combination error (before initial setting for communication completes) | •Connection of wrong
devices. •The power of the gas furnace is not turned ON, or the power of the gas furnace is turned ON after a certain period of time has been elapsed after the power of the CXTQ-TA was turned ON. •Disconnection of the communication wire between the CXTQ-TA and the gas furnace. •Two or more gas furnaces are connected to one CXTQ-TA. •No gas furnace is connected. |
x | Communication error | CXTQ-TA | |||||||||||||||||||
| UH[443] | 0x9B | 06 | Climate Talk Communication system combination error (after initial setting for communication completes) | •Connection
of wrong devices. •Two or more gas furnaces are connected to one CXTQ-TA. |
x | Communication error | CXTQ-TA | |||||||||||||||||||
| UC[444] | 0x9C | Address duplication of centralized controller | •Address duplication of
centralized controller. •Defective indoor unit control PCB. |
x | All IDU models/Centralized control equip | minor | System error | VRV Indoor/Central Controller | UC | |||||||||||||||||
| UJ[445] | 0x9D | Malfunction of transmission (Accessory devices) | •Defect
of accessory devices. •Faulty wiring. |
If accessory device is operating correctly check wiring. | x | System error | System (VRV) | UJ(D) | ||||||||||||||||||
| UE[446] | 0x9E | Transmission error between IDU centralized controllers | •Transmission error between
optional controllers for centralized controller and indoor unit. •Connector for setting main controller is disconnected(or disconnection of connector for independent / combined use changeover switch). •Defective PCB for central remote controller. •Defective indoor unit control PCB. |
Refer to Broken Wire Check of the Relay Wires Check 15 Final | x | All IDU models/Centralized control equip | System error | VRV Indoor/Central Controller/Schedule Timer/iTC | UE | |||||||||||||||||
| UF[447] | 0x9F | No system settings | •Improper
connection of transmission wiring between indoor-outdoor units and
outdoor-outdoor units. •Failure to execute check operation. •Defective indoor unit control PCB. •Stop valve is not opened. |
•After making wiring correction cycle power on master outdoor unit and run check operation again. | x | REYQ-T/All IDU models | System error | VRV | UF | |||||||||||||||||
| UF | 01 | System Not Set Yet | •Improper
connection of transmission wiring between indoor-outdoor units and
outdoor-outdoor units. •Failure to execute check operation. •Defective indoor unit control PCB. •Stop valve is not opened. |
•This error will typically happen in test operation. It is caused by no temperature change on the indoor units coil. Clear error and try to start indoor unit affected. Determine cause for lack of refrigerant flow. | x | System error | VRV IV | |||||||||||||||||||
| UF | 05 | System Not Set Yet | •Improper
connection of transmission wiring between indoor-outdoor units and
outdoor-outdoor units. •Failure to execute check operation. •Defective indoor unit control PCB. •Stop valve is not opened. |
•This error will typically happen in test operation. It is caused by no temperature change on the indoor units coil. Clear error and try to start indoor unit affected. Determine cause for lack of refrigerant flow. | x | System error | VRV IV | |||||||||||||||||||
| M1 | TheP1P2 communication does not support. | PC board defect | •Defect of centralized remote controller PCB. | •Check polarity at all d3 net connections. | x | Central remote controller | System error | Central Remote Controller | ||||||||||||||||||
| M8 | Transmission error between optional controllers | •Other
centralized control power disconnection. •Defect of transmission wiring. •Centralized control reset switch ON. •Central remote controller address change. |
•Make sure one controller is master. | x | Central remote controller | System error | Central Remote Controller | |||||||||||||||||||
| MA | Wrong combination of optional controllers | •Improper
combination of optional controllers for centralized control. •More than one master controller is connected. •Faulty setting of centralized control. •Defect of centralized control. |
x | Central remote controller | System error | Central Remote Controller | ||||||||||||||||||||
| MC | Address duplication | •Address duplication of central remote controller. | •Verify addresses aren't duplicated. | x | Central remote controller | System error | Central Remote Controller | |||||||||||||||||||
| E-2 | Indoor temperature is out of range during auto charge operation. | •Indoor temperature: 50°F (10°C) DB-89°F (32°C) DB. | N/A | x | System error | VRV IV | ||||||||||||||||||||
| E-3 | Outdoor temperature is out of range for auto charge operation. | •Outdoor temperature: 32°F (0°C) DB-109°F (43°C) DB. | N/A | x | System error | VRV IV | ||||||||||||||||||||
| E-5 | An indoor unit which is not
compatible with automatic refrigerant charging functionality is installed (e.g., Mini-split indoor unit, etc.) |
•Total indoor unit capacity: ≥ 80%. | N/A | System error | VRV IV | |||||||||||||||||||||
| 7H | Water flow too low | •Closed
shut off valve. •Air in the system. •Clogged water filter. •Insufficient water pressure. •Too high external static pressure (pump speed setting). •Malfunction of pump. •Pump fuse open [FU2]. •Malfunction of pump relay [K4M]. •During defrost. •Malfunction of the backup heater [Q1L, F1T]. •Backup heater fuse [F1B]. •In case of EKHWS. •Malfunction of the 3-way valve. •In case of the EKHWS. •Malfunction of the tank thermostat [Q1T, Q3L]. •Malfunction of 2-way valve. |
System error | Altherma | ||||||||||||||||||||||
| 64 | Unknown codes | IDU's air sensor error | x | Heat reclaim ventilation | minor | Sensor error | ||||||||||||||||||||
| 65 | Outside air sensor error | x | Heat reclaim ventilation | minor | Sensor error | |||||||||||||||||||||
| 6A | Damper system alarm | x | Heat reclaim ventilation | minor | System error | |||||||||||||||||||||
| 6A | Damper system sensor error | x | Heat reclaim ventilation | System error | ||||||||||||||||||||||
| 6F | Simple remote controller error | x | Heat reclaim ventilation | System error | ||||||||||||||||||||||
| 6H | Door switch error | x | Heat reclaim ventilation | System error | ||||||||||||||||||||||
| 80 | Thermistor or Related Abnormality (Hydro-box) | •Faulty
connector connection. •Faulty thermistor. •Faulty PCB. |
•Refer to Altherma Check 6. | System error | Altherma | |||||||||||||||||||||
| 81 | Thermistor or Related Abnormality (Hydro-box) | •Faulty
connector connection. •Faulty thermistor. •Faulty PCB. |
•Refer to Altherma Check 6. | System error | Altherma | |||||||||||||||||||||
| 8H | Hydrobox outlet water temperature too high >149F | •Malfunction
of the outlet water thermistor [R2T]. •Malfunction of the backup heater relays [K1M, K2M]. •In case of combination with boiler. •Incorrect cooperation of systems. |
System error | Altherma | ||||||||||||||||||||||
| 94 | Internal transmission error | x | Heat reclaim ventilation | System error | ||||||||||||||||||||||