Error 18 — Compressor motor desynchronizing

What does 18 mean?

Loss of synchronization between the compressor windings (U, V, W) occurred during speed changes. This can be caused by unstable power, internal compressor faults, or wiring issues.

• Unstable power supply
• Internal compressor fault
• IPM fault
• Compressor terminal wiring incorrect
• Poor wiring condition
• Loose compressor wiring connection

Click steps to track your progress.

1. 1

   Check the stability of the power supply.

2. 2

   Inspect compressor terminal wiring for tightness and correctness.

3. 3

   Check the IPM for faults.

4. 4

   If the problem persists, the compressor or IPM may need replacement.