Alarm 334 (or 449, 132) Failed compressor starts — Compressor does not start when required

What does Failed compressor starts 334 mean?

This alarm indicates that the compressor has failed to start when required 3 times within 2 hours, potentially due to a defective inverter or compressor.

• Defective inverter.
• Defective compressor.
• 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.

3. 3

   Check the Heat Pump’s fuses (F1, F2, F4) or automatic protection (FC1 / FB1).

4. 4

   Wait for at least 30 minutes, then check if the compressor starts. If not, contact a qualified technician.