UP (4210) - Compressor overcurrent or 12 VDC power supply failure

What does UP mean?

This error indicates either the compressor is drawing too much current, or there's a problem with the 12 VDC power supply circuit on the outdoor unit's power circuit board of the Mitsubishi Electric PUMY Air Conditioner. The system will stop operating.

• Compressor malfunction causing excessive current draw
• Fault on the power circuit board of the outdoor unit
• Electrical surge or instability in the power supply
• Faulty 12 VDC power supply component

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, as this involves internal electrical components and diagnostics.