Mitsubishi Electric UF

Critical

Mr. Slim — Compressor overcurrent at startup (locked rotor).

Mitsubishi Electric UF: Compressor overcurrent at startup (locked rotor). This fault typically halts operation and needs immediate attention.

Possible causes

Compressor mechanically locked.
Winding/wiring faulty.

Check steps

Power off: measure winding resistance & insulation.
Check wiring & startup.

Affected parts

Verdichter

Safety note

High voltage! Let capacitors discharge.

Source: Mitsubishi Electric resmi servis kılavuzu — Mr. SLIM Indoor Unit output pattern B, No.4: 'UF — Compressor overcurrent interruption (When compressor locked)'.

Reviewed by Anıl Güzeldemir — in the refrigeration machine room since 2006, developer of Enthalio.

Look up in Enthalio →

Related fault codes

Indoor/outdoor communication error.E6 High discharge temperature — compressor overheU2 Outdoor thermistor fault (open/short).U4 Pipe temperature error (often defrost/thermistP8 Intake (room) thermistor fault.P1 Pipe (liquid) thermistor fault.P2