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Error Codes
The error codes that are displayed on the indoor units may vary from the outdoor unit codes. The information communicated by
Indoor
LED5
Indoor
LED1
Outdoor
LED
Diagnosis
2 1 1 Outdoor EEPROM failure
2 2 2 IPM overcurrent or short circuit
2 3 / Outdoor alternating current, over current protection
2 4 4 Communication failure between the IPM and outdoor PCB
2 5 5 Module operated overload (compressor overload protection)
2 6 6 Module low or high voltage
2 7 / Compressor current sampling circuit fault
2 8 8 Overheat protection for discharge temperature
2 9 9 Malfunction of the DC fan motor
3 0 10 Malfunction of defrost temperature sensor
3 1 11 Suction temperature sensor failure
3 2 12 Ambient temperature sensor failure
3 3 13 Discharge temperature sensor failure
3 4 / High outdoor suction temperature
3 5 15 Communication failure between the indoor & outdoor unit
3 6 16 Lack of refrigerant or discharging
3 7 17 4-way valve switching failure
3 8 18 Loss of synchronism detection
3 9 / Position detection circuit fault of compressor
4 0 / Terminal block temp too high
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4 0 20 Indoor thermal overload
4 1 21 Indoor unit overload protection, heating mode only.
4 1 21 Indoor coil frosted
4 2 / Indoor anti-frosting protection
4 3 23 Module thermal overload
4 4 24 Compressor start failure, over-current
4 5 25 Phase current protection (IPM)
4 6 26 MCU reset
4 7 27 Module current detect circuit malfunction
4 8 28 Liquid pipe sensor failure: Circuit A
4 9 29 Liquid pipe sensor failure: Circuit B
5 0 30 Liquid pipe sensor failure: Circuit C
5 1 31 Liquid pipe sensor failure: Circuit D
5 2 32 Gas pipe sensor failure: Circuit A
5 3 33 Gas pipe sensor failure: Circuit B
5 4 34 Gas pipe sensor failure: Circuit C
5 5 35 Gas pipe sensor failure: Circuit D
5 6 36 Gas pipe sensor failure: Circuit E
5 7 / Outdoor pipe temperature protection in cooling mode
5 8 38 Malfunction of module temperature sensor momentary power failure detection
5 9 39 Malfunction of condensing temperature sensor
6 0 40 Liquid pipe sensor failure: Circuit E
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6 1 41 Toci temperature sensor failure
6 2 42 High Pressure switch open
6 3 43 Low Pressure switch open
6 4 44 System high pressure protection: Overcharged, high condensing temperature or malfunction of fan motor
6 5 45 System low pressure protection: Undercharged, low defrosting temperature, or malfunction of fan motor
6 6 / Incorrect match between indoor & outdoor
0 1 / Indoor ambient temperature sensor failure
0 2 / Indoor coil temperature sensor failure
0 4 / Indoor PCB EEPROM failure
0 7 / Communication fault between the indoor and outdoor unit
0 8 / Communication fault between the controller and Indoor unit
0 12 / Drain system malfunction
0 13 / Zero cross signal detected wrong
0 14 / Indoor fan motor malfunction
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