Error 105 - Communication error between main and fan PCBs

What does 105 mean?

This fault indicates a communication breakdown between the main outdoor unit PCB and the fan PCB.

• Open or short circuit in the communication line between PCBs
• Loose or faulty connection of the communication cable plug
• Communication LED on the main PCB is not illuminated

Click steps to track your progress.

1. 1

   Check the communication line between the Main and Fan PCBs for any open or short circuits.

2. 2

   Inspect the communication cable plug connections for security and cleanliness.

3. 3

   Verify that the communication LED on the main outdoor unit PCB is illuminated.