U6 (4250) - Power module or overcurrent trouble

What does U6 mean?

There is a problem with the power module or an overcurrent condition has been detected in the Mitsubishi Electric PUMY Air Conditioner. This indicates a serious electrical fault and the system will stop operating.

• Faulty power module within the outdoor unit
• Electrical overcurrent in the system
• Short circuit in an electrical component
• Issue with the compressor causing high current draw

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 indicates a serious electrical or component fault.