High mains voltage 431 — Compressor is blocked: High phase voltage

What does 431 mean?

The phase voltage to the inverter has been too high 3 times within 3 hours or continuously for 1 hour. Check fuses, cable connections, and supply voltage.

• The phase voltage to the inverter has been too high 3 times within 3 hours or continuously for 1 hour
• Main and group fuses and their cable connections
• Low supply voltage
• Phase loss

Click steps to track your progress.

1. 1

   Check main and group fuses.

2. 2

   Verify cable connections to the inverter.

3. 3

   Measure the supply voltage.

4. 4

   Ensure all phases are present.

5. 5

   Contact an electrician or technician.