LCD shows Fb - Abnormality of indoor controller board

What does Fb mean?

The remote controller LCD displays 'Fb', indicating an abnormality with the indoor controller board.

• Indoor controller board malfunction.
• Memory error on the indoor controller board.
• Internal fault with the indoor unit's control system.

Click steps to track your progress.

1. 1

   Turn off the main power supply to the indoor unit, wait for a minute, then turn it back on to reset the system.

2. 2

   Check if all connectors on the indoor controller board are securely fastened.

3. 3

   If the error persists after a power reset, the indoor controller board may need inspection or replacement by a qualified technician.