[LG Air Conditioner Error Code] CH54 is shown on the display

Causes and Symptoms

• You made wrong internal connections in the circuit breaker box during electrical construction works.

Try this

After electrical construction works, does the wired remote controller display the CH54 message?

➔ Turn on the dedicated circuit breaker connected to the air conditioner and then turn off after 3 minutes for use.

If the error persists then contact the electrical construction company to check RSW connections of power supplies.
CH54 error occurs if there is no voltage from one line or the order of wiring is reversed.

Wait! Find out more.

Assuming electrical construction works were done recently, if you reverse the order of phases R/S/T when connecting internal wires of breaker box, then in order to prevent a reverse rotation of the motor, the outdoor unit is halted and the CH54 error code is displayed.

This guide was created for all models, so the images or content may be different from your product.