Upper lamp blinks 4 times — Indoor Control System Error

What does Upper lamp blinks 4 times mean?

The upper lamp on the indoor unit blinks four times, signaling an error in the indoor control system. This means the indoor electronic control P.C. board cannot properly read data from its nonvolatile memory.

• Faulty indoor electronic control P.C. board
• Data corruption within the nonvolatile memory of the control board

Click steps to track your progress.

1. 1

   Turn off the air conditioner at the main power supply breaker.

2. 2

   Wait for at least 30 seconds, then turn the main power supply back on.

3. 3

   Press the RESET button on your remote controller.

4. 4

   If the error persists, contact a qualified service technician for inspection and potential replacement of the indoor electronic control P.C. board.