Airwell Air Conditioning Fault Codes

Airwell YBZE218-324-430 Air Conditioning Fault Codes

Fault code LEDs blinking RUNLEDs blinking COOLLEDs blinking HEATFault descriptionPossible Reason
E11HP switch protection1. Refrigerant was superabundant
2. Poor heat exchange (including blockage and bad radiating environment)
3. Too high ambient temperature
E22Indoor coil defrost Protection1. Poor air-return in indoor unit
2. Fan speed is abnormal
3. Evaporator is dirty
E44Compressor over Heating Protection1. EEV connection problem or damage
2. Refrigerant leakage
3. Poor heat exchange
E55AC Over current protection1. Supply voltage is unstable
2. Supply voltage is too low and load is too high
E66Communication malfunction1. Wiring mistakes
2. IDU or ODU PCB problem
E77Mode conflictMode conflict to other IDU
E88Indoor coil/Outdoor coil over heating protection1. Too high ambient temperature
2. Poor heat exchange (including blockage and bad radiating environment)
H611No feedback of indoor motor1.FAN motor damaged
2. I FAN motor blocked
3. IDU PCB problem
C515Malfunction protection of jumper capPoor connection of the jumper on indoor PCB.
U817Zero-crossing protection (IDU)1.FAN motor damaged
2. Zero-crossing circuit damaged on IDU PCB
LP19Mismatch of IDU and ODU
F11RAT failure1. Senor was broken or damaged
2. PCB temperature detection circuit has problem
F22ICT failure1. Senor was broken or damaged
2. PCB temperature detection circuit has problem
F33OAT failure1. Senor was broken or damaged
2. PCB temperature detection circuit has problem
F55CTT failure1. Senor was broken or damaged
2. PCB temperature detection circuit has problem
PH11DC over voltage1. AC input voltage is too high.
2. Reactor has problem
3. ODU PCB has problem
F418OCT failure1. Senor was broken or damaged
2. PCB temperature detection circuit has problem
b519RLT failure1. Senor was broken or damaged
2. PCB temperature detection circuit has problem
b722RGT failure1. Senor was broken or damaged
2. PCB temperature detection circuit has problem

Airwell Wall Split XLS Series Air Conditioning Fault Codes

Fault code Fault descriptionPossible Reason
H3Compressor overload protection1. EEV connection problem or damaged
2. Refrigerant leakage
3. OLP damaged
H5IPM protection1. Abnormal power input voltage.
2. Compressor wiring mistake.
3. Liquid and gas valve are not open.
4. EEV damaged or not proper working
5. Poor heat exchange.
6. Over charged system.
HCPFC protection1. PFC module assembly problem.
2. Poor heat exchange of Heatsink
3. PFC reactor problem.
4. Abnormal power voltage
5. PFC circuit problem on PCB
H7Desynchronizing of compressor1. Abnormal power input voltage.
2. Compressor wiring mistake.
3. Liquid and gas valve are not open.
4. EEV damaged or not proper working
5. Poor heat exchange.
6. Over charged system.
LcCompressor start-up failure1. Compressor wiring mistake
2. Over charged system
3. System not balanced before compressor starting
4. Compressor problem
U1Compressor phase current detection problemPhase current detection circuit for compressor has problem
P5DC over current1. Abnormal power input voltage.
2. Compressor wiring mistake.
3. Liquid and gas valve are not open.
4. EEV damaged or not proper working
5. Poor heat exchange.
6. Over charged system.
PUCharging malfunction of capacitor1. Reactor open
2. Charging relay or other components damaged on PCB.