Acson AC Error Codes and Troubleshooting

The code indication changes as shown below, and notifies with a long beep.

E1	Outdoor Pcb Error
E3	High Pressure Protection
E4	Low Pressure Protection
E5	Compressor Motor Lock/Compressor Overloaded
E6	Compressor Start-up Error
E7	Outdoor Dc Fan Motor Lock
E8	Ac Input Over Current
E9	Exv Errorea 4 Way Valve Error
F3	Discharge Pipe Overheat
F6	Heat Exchanger Overheat

00	Normal
A1	Indoor Pcb Error
A3	Drain Pump Abnormal
A5	Antifreeze (Cooling)/Heat Exchanger Overheat (Heating)
A6	Indoor Fan Motor Abnormalah Electrical Air Cleaner Abnormal
C4	Indoor Heat Exchanger (1) Thermistor Short/open
C5	Indoor Heat Exchanger (2) Thermistor Short/open
C7	Louver Limit Switch Error
C9	Indoor Room Thermistor Short/open

H0	Compressor Sensor System Error
F3	High Pressure Switch Error
H6	Compressor Feedback Detection Error
H7	Fan Motor Overloaded/Overcurrent/Sensor Abnormal
H8	AC Current Sensor Error

Error Code Faulty Indication Error / Code Faulty Indication

E01	Require manual reset (possible causes)
E02	Compressor 1 high temperature (overload)
E03	Compressor 2 high temperature (overload)
E04	Compressor 3 high temperature (overload)
E05	Compressor 4 high temperature (overload)
E06	Compressor 1 high pressure trip / contact open
E07	Compressor 2 high pressure trip / contact open
E08	Compressor 3 high pressure trip / contact open
E09	Compressor 4 high pressure trip / contact open
E10	Compressor 1 trip/low refrigerant/outdoor abnormal
E11	Compressor 2 trip/low refrigerant/outdoor abnormal
E12	Compressor 3 trip/low refrigerant/outdoor abnormal
E13	Compressor 4 trip/low refrigerant/outdoor abnormal
E14	Room sensor short E32 Compressor 1 de-ice
E15	Room sensor open E33 Compressor 2 de-ice
E16	Indoor coil sensor 1 short E34 Compressor 3 de-ice
E17	Indoor coil sensor 2 short E35 Compressor 4 de-ice
E18	Indoor coil sensor 3 short
E19	Indoor coil sensor 4 short
E20	Indoor coil sensor 1 open