Operation Indicator Lamp 4 Blinks - Indoor Unit Control System Trouble

What does Upper lamp 4-time blink mean?

The upper lamp of the indoor unit's Operation Indicator blinks four times in a pattern. This indicates a general problem with the indoor unit's control system, suggesting an internal electronic fault within the main control board.

• Trouble with the indoor electronic control P.C. board.

Click steps to track your progress.

1. 1

   Turn OFF the main power supply to the air conditioner.

2. 2

   Wait for at least 30 seconds to allow the system to fully reset.

3. 3

   Turn the main power supply back ON and try to operate the unit normally.

4. 4

   If the 4-time blinking persists, this likely indicates a fault with the indoor electronic control P.C. board, requiring professional service.