OPERATION INDICATOR lamp blinks 4 times — Indoor control system error

What does OPERATION INDICATOR 4 blinks mean?

The indoor unit's upper lamp blinks four times, indicating that the system cannot properly read data from the nonvolatile memory on the indoor electronic control P.C. board. This suggests an issue with the main control board.

• Corrupted data on the indoor electronic control P.C. board
• Malfunction of the indoor electronic control P.C. board

Click steps to track your progress.

1. 1

   Turn OFF the power supply to the unit at the circuit breaker for at least 30 seconds, then turn it back on.

2. 2

   If the problem persists, the indoor electronic control P.C. board may need to be replaced.

3. 3

   Contact a qualified technician for further diagnosis and repair.