Left lamp flashes 4 times — Indoor control system error

What does 4 (4-time flash) mean?

The left Operation Indicator lamp flashes four times, followed by a 2.5-second off period. This signifies that the unit cannot properly read data from the nonvolatile memory of the indoor electronic control P.C. board, indicating an internal system error.

• Corruption or inability to read data from the indoor electronic control P.C. board's nonvolatile memory.

Click steps to track your progress.

1. 1

   Disconnect the main power supply to the air conditioner for at least 30 seconds.

2. 2

   Reconnect the power supply and attempt to restart the unit to see if the error clears.

3. 3

   If the error code reappears consistently, the indoor electronic control P.C. board may be faulty and needs to be replaced. Contact a qualified service technician for assistance.