What does PC11 mean?

The DC bus voltage on the outdoor unit's main control board has become excessively high, triggering a protective shutdown.

• Power surge
• Faulty components on the main control board
• Issues with power conversion circuitry

Click steps to track your progress.

1. 1

   Ensure the unit is protected from power surges.

2. 2

   Reset the system by turning off the power breaker for 30 seconds, then turning it back on.

3. 3

   If this error repeats, the main control board likely requires professional diagnosis and replacement.