PC43 — Outdoor compressor lack phase protection

What does PC43 mean?

The outdoor compressor is experiencing a lack of phase issue, meaning one or more of the electrical phases required for its operation are missing or unstable.

• Electrical supply problem (e.g., single-phase power to a three-phase motor)
• Internal compressor winding fault
• Issues with the electrical connection

Click steps to track your progress.

1. 1

   Verify that the electrical supply to the unit is correct and stable.

2. 2

   Check all electrical connections related to the compressor.

3. 3

   Reset the unit by turning off power for 30 seconds and then restoring it.

4. 4

   If the problem persists, professional service is required to inspect the compressor and power supply.