UF (4100) - Compressor current interruption (locked compressor)

What does UF mean?

The Mitsubishi Electric PUMY Air Conditioner system has detected an interruption in the compressor's electrical current, indicating the compressor might be locked or unable to start. The system will stop operating.

• A locked compressor, preventing it from rotating
• Electrical fault or issue in the compressor circuit
• Problem with the main power supply
• Faulty outdoor unit multi-controller

Click steps to track your progress.

1. 1

   Note the error code displayed on the remote controller or outdoor unit.

2. 2

   Power off the Mitsubishi Electric PUMY Air Conditioner system at the main electrical breaker.

3. 3

   Wait for at least 30 seconds, then restore power to the system.

4. 4

   If the error persists, contact a qualified service technician immediately as this can indicate a serious compressor issue.