LG air conditioner error codes
Displayed on the indoor unit or remote when a fault is detected. Always isolate power before inspecting a unit — repairs belong to a qualified technician.
| Code | Meaning | Applies to | |
|---|---|---|---|
| CH01 | Indoor air (room) temperature sensor fault. | All models | Details |
| CH02 | Indoor pipe (coil) temperature sensor fault. | All models | Details |
| CH03 | Drain pump or condensate removal error. | All models | Details |
| CH05 | Communication fault between the indoor and outdoor unit. | All models | Details |
| CH09 | Indoor unit EEPROM or memory error. | All models | Details |
| CH10 | Indoor fan motor fault or abnormal fan operation. | All models | Details |
| CH21 | Outdoor DC compressor IPM (inverter power module) fault. | All models | Details |
| CH22 | Outdoor current transformer (CT) error. | All models | Details |
| CH23 | Outdoor DC compressor overcurrent protection. | All models | Details |
| CH61 | High temperature protection in outdoor unit (cooling) or indoor unit (heating). | All models | Details |
| CH67 | Outdoor fan motor fault. | All models | Details |