Fuse (F11) blown — Electrical fault detected

What does Fuse (F11) blown mean?

A blown fuse (F11) suggests an electrical issue within the indoor unit's control board. This often accompanies problems with the fan motor or electronic components.

• Short circuit or open circuit in the indoor fan motor.
• The varistor (NR11) may be burnt.
• General electrical fault on the control board.

Click steps to track your progress.

1. 1

   Turn off the power supply to the unit.

2. 2

   Visually inspect the indoor electronic control P.C. board for any signs of burning or damage.

3. 3

   Replace the fuse (F11) and the varistor (NR11) if they appear burnt.

4. 4

   If the fan motor shows a short/open circuit, replace it along with the fuse.

5. 5

   If the issue persists after replacing the fuse and varistor, the indoor electronic control P.C. board may need replacement.