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Climate Talk Fault Code Transmitted message Dealer error code Possible causes Corrective actions Unit Type Alarm Status Consumer error message Thermostat Communication Alarm Thermostat Internal Hardware Alarm Alarm Category   Pressure  Alarms   Sensor Alarms   Safety  Alarms   System Communication Alarms   System Alarms   Fan Failure Alarms
                                             
                                             
00 EEV OPEN CKT Not used yet     Thermostat                                  
01   Not used yet     Thermostat                                  
02   Thermostat internal communication error ClimateTalk coprocessor was not anle to start. •Conduct a warm start of the thermostat.
•Call Daikin support at 1-855-DAIKIN1(option 1)
•Replace thermostat if needed
Thermostat Critical  Internal hardware error   2                          
03   Thermostat internal communication error ClimateTalk coprocessor did not respond to commands. •Conduct a warm start of the thermostat.
•Call Daikin support at 1-855-DAIKIN1(option 1)
•Replace thermostat if needed
Thermostat Critical  Communication error 3                            
04   Thermostat software upgrade error  ClimateTalk firmware was not able to upgrade. •Conduct a warm start of the thermostat.
•Call Daikin support at 1-855-DAIKIN1(option 1)
•Replace thermostat if needed
Thermostat Critical  Communication error 4                            
05   Thermostat internal communication error ClimateTalk communication errors. •Check for proper 24 VAC powering thermostat.
•Conduct a warm start of the thermostat.
•Call Daikin support at 1-855-DAIKIN1(option 1)
Thermostat minor  Communication error 5                            
06   Piezo speaker hardware error Piezo driver could not start due to hardware error. •Check for proper 24 VAC powering thermostat.
•Conduct a warm start of the thermostat.
•Call Daikin support at 1-855-DAIKIN1(option 1)
Thermostat minor  Internal hardware error   6                          
07   LED hardware error LED driver could not start due to hardware issue. •Check for proper 24 VAC powering thermostat.
•Conduct a warm start of the thermostat.
•Call Daikin support at 1-855-DAIKIN1(option 1)
Thermostat minor  Internal hardware error   7                          
08   Thermostat software upgrade error  OTA download signature is wrong, reverting back to previous firmware. •Check for proper 24 VAC powering thermostat.
•Conduct a warm start of the thermostat.
•Call Daikin support at 1-855-DAIKIN1(option 1)
Thermostat minor  Communication error 8                            
09   Thermostat software upgrade error  OTA upgrade failed. •Check for proper 24 VAC powering thermostat.
•Conduct a warm start of the thermostat.
•Call Daikin support at 1-855-DAIKIN1(option 1)
Thermostat minor  Communication error 9                            
0A   Proximity sensor hardware error Proximity sensor driver could not start due to hardware issue. •Check for proper 24 VAC powering thermostat.
•Conduct a warm start of the thermostat.
•Call Daikin support at 1-855-DAIKIN1(option 1)
Thermostat minor  Internal hardware error   10                          
0B   Temperature/Humidity sensor hardware error Temp/Hum sensor driver could not start due to hardware issue. •Conduct a warm start of the thermostat.
•Call Daikin support at 1-855-DAIKIN1(option1)
•Replace thermostat if needed
Thermostat Critical  Internal hardware error   11                          
0C   Temperature/Humidity sensor hardware error Temperature sensor failed during operation. •Conduct a warm start of the thermostat.
•Call Daikin support at 1-855-DAIKIN1(option 1)
•Replace thermostat if needed
Thermostat Critical  Internal hardware error   12                          
0D   Temperature/Humidity sensor hardware error Humidity sensor failed during operation. •Conduct a warm start of the thermostat.
•Call Daikin support at 1-855-DAIKIN1(option 1)
•Replace thermostat if needed
Thermostat Critical  Internal hardware error   13                          
0E   Wi-Fi hardware error WIFI driver could not start due to hardware issue. •Check for proper 24 VAC powering thermostat.
•Conduct a warm start of the thermostat.
•Call Daikin support at 1-855-DAIKIN1(option1)
Thermostat minor  Internal hardware error   14                          
0F   Wi-Fi hardware error WIFI driver communication issue. •Check for proper 24 VAC powering thermostat.
•Conduct a warm start of the thermostat.
•Call Daikin support at 1-855-DAIKIN1(option1)
Thermostat minor  Communication error 15                            
1E   Heat Pump communication loss •data1 and data2 could be reversed
•loss of power to the unit.
•Loose, cut, or broken wire.
•Check polarity of Data1 and Data2.
•Check for any blown fuses or tripped breakers.
•Check for loose terminations, shorted or broken wires.
•Call Daikin support at 1-855-DAIKIN_option 1)
Thermostat Critical  Communication error                     1E        
1F   Air Conditioner communication loss •data1 and data2 could be reversed
•loss of power to the unit.
•Loose, cut, shorted, or broken wire.
•Check polarity of Data1 and Data2.
•Check for any blown fuses or tripped breakers.
•Check for loose terminations, shorted or broken wires.
•Call Daikin support at 1-855-DAIKIN_option 1)
Thermostat Critical  Communication error                     1F        
20   EEV Coil communication loss •data1 and data2 could be reversed
•loss of power to the unit.
•Loose, cut, or broken wire.
•Check polarity of Data1 and Data2.
•Check for any blown fuses or tripped breakers.
•Check for loose terminations, shorted or broken wires.
•Call Daikin support at 1-855-DAIKIN_option 1)
Thermostat Critical  Communication error                     20        
21   Air Handler communication loss •data1 and data2 could be reversed
•loss of power to the unit.
•Loose, cut, or broken wire.
•Check polarity of Data1 and Data2.
•Check for any blown fuses or tripped breakers.
•Check for loose terminations, shorted or broken wires.
•Call Daikin support at 1-855-DAIKIN_option 1)
Thermostat Critical  Communication error                     21        
22   Furnace communication loss •data1 and data2 could be reversed
•loss of power to the unit.
•Loose, cut, or broken wire.
•Check polarity of Data1 and Data2.
•Check for any blown fuses or tripped breakers.
•Check for loose terminations, shorted or broken wires.
•Call Daikin support at 1-855-DAIKIN_option 1)
Thermostat Critical  Communication error                     22        
51   No ClimateTalk equipment discovered on network •data1 and data2 could be reversed
•loss of power to the unit.
•Loose, cut, or broken wire.
•Check polarity of Data1 and Data2.
•Check for any blown fuses or tripped breakers.
•Check for loose terminations, shorted or broken wires.
•Call Daikin support at 1-855-DAIKIN_option 1)
Thermostat Critical  Communication error                     51