LG Therma V fault CH54

What it means

Wiring fault occurred due to reverse phase detection (only applicable to 3-phase models). This protection prevents phase unbalance and reverse rotation of the constant-rate compressor.

Likely causes

1. Reverse phase wiring
2. Phase unbalance
3. N-phase fault
4. Power phase loss
5. Open phase condition
6. Fuse damage (R and S phases)

Where to start

1. Check installation wiring.
2. Check N-phase (refer to section 3.17.1).
3. Check for power phase loss (refer to section 3.17.2).