Climate Talk Fault Code | Dealer error message | Possible causes | Corrective actions | Alarm status | Unit Type | Consumer error message | ||||
70 | EEV open circuit( incorrect wiring or not connected) | •Indoor
EEV coil not connected. •Incorrect wiring to EEV. |
•Check
indoor EEV coil connection (PCB and junction connector). •Replace EEV coil. •Check the resistance value of EEV coil (refer to service manual). •Replace the control board. |
Critical | EEV | system error | ||||
d0 | EEV Data not on network | •No shared data on the network. | •Populate shared data set using memory card. | Critical | EEV | system error | ||||
d4 | EEV Invalid memory card data | •Wrong memory card data. | •Replace
circuit board. •Rewrite data using the correct memory card. |
Critical | EEV | system error | ||||
73 | Liquid side temperature fault | •Open
or short circuit of the liquid thermistor (X5A). •Liquid thermistor reading incorrect values or values outside the normal range. |
•Check
the connection to liquid thermistor (PCB and junction connector). •Check the resistance value of the thermistor (refer to service manual). •Replace thermistor •Replace the control board. |
Critical | EEV | Sensor error | ||||
74 | Gas side temperature fault | •Open
or short circuit of the gas thermistor (X5A). •Gas thermistor reading incorrect values or values outside the normal range. |
•Check
the connection to gas thermistor (PCB and junction connector). •Check the resistance value of the thermistor (refer to service manual). •Replace thermistor. •Replace the control board. |
Critical | EEV | Sensor error | ||||
75 | Pressure sensor fault | •Open
or short circuit of the pressure sensor (X15A). •Pressure sensor reading incorrect values or values outside the normal range. |
•Check
the connection to pressure sensor (PCB and junction connector). •Check the output voltage of the pressure sensor (refer to service manual). •Replace pressure sensor. •Replace the control board. |
Critical | EEV | Pressure error | ||||
76 | Equipment communication loss during operation | •Open
communication circuit. •Incorrect wiring between outdoor unit, gas furnace, or modular blower. •No power supply to outdoor unit, gas furnace, or modular blower. |
•Check
for cased coil and other unit wiring. •Replace the control board. •Check the power supply to outdoor unit, gas furnace, or modular blower. |
Critical | EEV | Communication error | ||||
77 | Thermostat communication loss during startup & operation | •Incorrect
wiring between indoor unit and thermostat. The system may have the communication error without error code 77 on the indoor PCB. Follow system troubleshooting in installation manual. •Thermostat failure. •Power interruption (low voltage). |
•Check
for thermostat and indoor unit wiring. •Verify the input voltage at the indoor unit and thermostat. After recovering the system with power supply, TSTAT ID NO COM will continue to be displayed on the thermostat for 2 minutes. The error code will be cleared automatically. •Replace control board or thermostat. •Press "LEARN" button on PCB for more than 5 seconds to reestablish network. |
Critical | EEV | Communication error | ||||
78 | Equipment communication loss during startup | •Open
communication circuit. •Incorrect wiring between outdoor unit, gas furnace, or modular blower. •No power supply to outdoor unit, gas furnace, or modular blower. |
•Check
for cased coil and other unit wiring. •Replace the control board. •Check the power supply to outdoor unit, gas furnace, or modular blower. |
Critical | EEV | Communication error | ||||