E57 — Communication Error between Subcooling Module and Main PCB

What does E57 mean?

This error, sent by the subcooling module, indicates a communication failure between the subcooling module and the main PCB (Printed Circuit Board).

• Loose or damaged communication wiring between the subcooling module and Main PCB.
• Interference affecting the communication signal.
• A fault with either the subcooling module or the Main PCB.

Click steps to track your progress.

1. 1

   Turn off the main power to the Haier unit at the circuit breaker.

2. 2

   Wait for at least 30 seconds.

3. 3

   Restore power to the unit and observe if the error clears.

4. 4

   If the error persists, contact a qualified service technician to inspect the communication wiring and relevant control boards.