Alarm Z1 Internal compressor driver fault 1 — Compressor driver issue

What does 5395 mean?

This alarm occurs if 3 specific warnings (code 5394) are logged within 3 hours, or if the warning is active for 30 minutes. It indicates a problem with the compressor's internal driver.

• Incorrect setting on the heat pump's rotary encoder.
• Electrical fault in the compressor.
• Defective inverter.

Click steps to track your progress.

1. 1

   Check and compare the rotary encoder setting (P=4 or P=6) with the manual's definition.

2. 2

   Measure resistance between compressor windings and earth. If less than 10 kOhm, replace the compressor.

3. 3

   If the issue persists after checking the compressor, consider replacing the inverter.