Carrier Air Conditioning error codes



Carrier Air Conditioning error codes

EO: (OL 1 Times) Indoor unit EEPROM parameter error.

E1: (OL 2 Times) Indoor/outdoor units communication error.

E3: (OL 4 Times) The speed of the indoor fan has gone out of control.

E4: (OL 5 Times) Indoor room temperature sensor T1 open circuit or short circuit.

E5: (OL 6 Times) Evaporator coil temperature sensor T2 open circuit or short circuit.

EC: (OL 7 Times) Refrigerant leak detection.

F1: (OL 2 Times, TL on) Outdoor ambient temperature sensor T4 open circuit or short

F2: (OL 3 Times TL on) circuit. Condenser coil temperature sensor T3 open circuit or short circuit.

F3: (OL 4 Times, TL on) Compressor discharge temperature sensor T5 open circuit or short circuit.

F4: (OL 5 on) Outdoor unit EEPROM parameter error.

F5: (OL 6 on) The speed of the outdoor fan is out of control.

P0: (OL 1 flash) Strong current protection over IPM malfunction or IGBT.

P1: (OL 2 flash) Over voltage or low voltage protection.

P2: (OL 3 flash) High-temperature protection of compressor top diagnostics and solutions.

P4: (OL 4 flash) Inverter compressor drive error.

F8: (OLF 9 Times) Compressor Suction Temperature sensor defective.

L3: (OLF 33 Times) Drive Phase current overload defective.

L4: (OLF 34 Times) Phase Current Sampling defective.

FO: (OLF 13 Times) Outdoor AC Current protection.

L1: (OLF 31 Times) Drive bus voltage overload protection.

L2: (OLF 32 Times) Drive bus voltage overflow protection.

P5: (OLF 14 Times) Compressor phase current protection.

P6: (OLF 16 Times) Outdoor over high/over-low DC voltage protection.

P7: (OLF 17 Times) IPM Temperature over heat protection.

P8: (OLF 18 Times) Compressor discharge Temperature overheat protection.

P9: (OLF 19 Times) Cooling indoor Unit anti-freezing protection.

PU: (OLF 20 Times) Cooling Outdoor Coil over heat protection.

PE: (OLF 21 Times) Heating indoor coil over heat protection.

PC: (OLF 22 Times) Cooling outdoor ambient Temperature over-low protection.

PH: (OLF 23 Times) Heating outdoor ambient Temperature over-high protection.

E2: (OLF 27 Times) Zero crossing signal detection error.


OLF= Outdoor LED Flash, OL = Operation Lamp, TL = Timer Lamp


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