E39-1 — Compression Ratio Over High Protection

What does E39-1 mean?

This error indicates that the compressor's compression ratio has exceeded 10.0 for one continuous minute after starting, leading to a shutdown and alarm.

• Imbalance in refrigerant pressures (suction and discharge).
• A faulty expansion valve.
• An issue with the compressor's operation.

Click steps to track your progress.

1. 1

   Turn off the main power to the Haier unit at the circuit breaker.

2. 2

   Wait for at least 30 seconds, then restore power.

3. 3

   Allow the unit to attempt to restart.

4. 4

   If the error persists or recurs frequently, contact a qualified service technician to diagnose the refrigerant system and compressor.