12-time blink - Indoor control system memory issue

What does Fb mean?

The operation indicator lamp blinks twelve times. This means the indoor electronic control board cannot properly read data from its non-volatile memory.

• Faulty indoor electronic control P.C. board
• Corrupted data in the control board's memory
• Power surge affecting the control board

Click steps to track your progress.

1. 1

   Replace the indoor electronic control P.C. board.

2. 2

   Ensure stable power supply to the unit.

3. 3

   If the issue persists, check for outdoor unit errors as well ('EE' error may appear together).