Alarm 333 (or 447, 130) Phase failure — Compressor phase is missing

What does Phase failure 333 mean?

This alarm indicates that a compressor phase is missing, occurring 3 times within 2 hours or continuously for 1 minute, often due to a disruption in supply voltage or incorrect wiring.

• Disruption in supply voltage.
• Compressor phase is missing.
• Incorrectly connected compressor cable.

Click steps to track your progress.

1. 1

   Check the indoor module/control module display for specific action instructions.

2. 2

   Verify all supply cables to the Heat Pump are connected and secure.

3. 3

   Check the group and main fuses of the accommodation and the Heat Pump’s fuses.

4. 4

   If the alarm persists, contact a qualified electrician to check the phase supply and compressor wiring.