Fault code 57 — Refrigerant sensor communication fault or refrigerant sensor fault

• The refrigerant sensor fails to communicate with the indoor unit for a long time
• The refrigerant sensor reports the fault message such as life loss

Click steps to track your progress.

1. 1

   Reconnect the connection cable between the refrigerant sensor and the indoor unit board.

2. 2

   Replace the refrigerant sensor if the connection is secure and the fault persists.