Westinghouse air conditioner error codes help technicians or users of HVAC systems identify the possible causes of system malfunctions.
| Error Codes | Problem Description |
|---|---|
| E0 | EEPROM parameter error of the indoor unit. |
| E1 | Communication error between indoor and outdoor units. |
| E2 | Zero-crossing signal detection error. |
| E3 | The indoor fan speed is out of control. |
| E4 | Open or short circuit of the T1 indoor ambient temperature sensor. |
| E5 | Open or short circuit of the T2 evaporator coil temperature sensor. |
| CE | Refrigerant leak detection. |
| F1 | Open or short circuit of the T4 outdoor ambient temperature sensor. |
| F2 | Open or short circuit of the T3 condenser coil temperature sensor. |
| F3 | Open or short circuit of the T5 compressor discharge temperature sensor. |
| F4 | EEPROM parameter error of the outdoor unit. |
| P0 | IPM malfunction or IGBT overcurrent protection. |
| P1 | Overvoltage or undervoltage protection. |
| P2 | High-temperature protection for the compressor top. Diagnosis and solution required. |
| P4 | Inverter compressor drive error. |
