Fuse (F11) blown only — Potential indoor fan motor or control board issue

What does Fuse (F11) blown only mean?

Only the fuse (F11) on the indoor power P.C. board has blown. This could indicate a problem with the indoor fan motor or the electronic control P.C. board.

• Indoor fan motor fault
• Indoor electronic control P.C. board fault
• Short circuit in connected components

Click steps to track your progress.

1. 1

   Turn off the power supply and replace the fuse (F11).

2. 2

   Measure the resistance of the indoor fan motor connector (CN211). If resistance is low (short circuit), replace the fan motor.

3. 3

   Measure the resistance of resistor (R111) or reactor (L111) on the indoor power P.C. board. If readings are abnormal, consider replacing the board.

4. 4

   If the fuse blows again immediately, further diagnosis of the fan motor and control board is needed.