Fan fault

What does FN mean?

For inverters equipped with a cooling fan, this alarm appears on the operation panel when the cooling fan stops due to a fault or operates inconsistently with the setting of Pr. 244 "cooling fan operation selection". This indicates a problem with the inverter's active cooling system.

• Indoor or outdoor unit fan motor failure or obstruction.
• Fan speed sensor not reporting correct RPM (P1-32).
• Loose fan belt or coupling.
• Fan motor overload or internal winding fault.

Click steps to track your progress.

1. 1

   Visually inspect the cooling fan for obstructions, debris, or physical damage.

2. 2

   Verify the cooling fan's electrical connections are secure.

3. 3

   Check the setting of Pr. 244 (cooling fan operation selection) to ensure it is configured correctly for the application.