Indoor Unit Malfunction

What does Fb mean?

The 'Fb' code indicates a general malfunction within the indoor unit, as displayed on the remote controller LCD. For specific diagnostic details regarding the root cause, further reference to the detailed error code list in the manual is required.

• Internal component failure in the indoor unit's control board.
• Sensor reading outside expected operational range for indoor unit.
• Power supply instability to indoor unit components.
• Software or firmware error on the indoor unit's main processor.

Click steps to track your progress.

1. 1

   Refer to the 'Error code list' in section 'V.4.2.Error code list' of the complete manual for specific diagnostic information related to the Fb code.

2. 2

   Visually inspect the indoor unit for any signs of physical damage, obstructions to airflow, or unusual noises during operation.