Prism+ Aircon Error Codes

Search any Prism+ error code below. Each entry shows what the code means, how urgent it is, and what to do next — with notes specific to Singapore installations.

Error Code Lookup

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Prism+ Aircon Error Codes

Error Code Lookup

E1Indoor room temperature sensor (TA) error - open circuit or short circuit detected

E2Indoor coil (evaporator) temperature sensor (TC) error - open or short circuit

E3Indoor anti-freeze protection - evaporator coil icing detected

E4Communication error between indoor and outdoor units

E5Overcurrent protection - compressor or IPM overcurrent detected

E6Indoor fan motor fault - fan speed abnormal or motor protection triggered

E8High-pressure protection - outdoor unit high refrigerant pressure detected

F0Refrigerant leakage protection - low refrigerant pressure or leak detection fault

F1Outdoor ambient temperature sensor error - open or short circuit

F2Condenser (outdoor coil) temperature sensor error - open or short circuit

F3Compressor discharge temperature sensor error - open or short circuit

P1IPM (Intelligent Power Module) protection - inverter drive fault

P2High/low voltage protection - supply voltage outside acceptable range

P3Compressor overheating protection - discharge temperature or compressor top temperature exceeded

P4Outdoor fan motor protection - outdoor fan speed abnormal or motor overload

DWDrainage / water overflow fault - condensate drain blocked or float switch triggered

CFIndoor PCB (control board) malfunction - hardware fault detected

WFWi-Fi module fault or connectivity loss - smart control unavailable