Mitsubishi Electric · City Multi Air Conditioning Systems
This fault indicates an issue with the current sensor. Possible causes include problems with the power supply voltage, compressor wiring, or a faulty input sensor on the outdoor power circuit board.
Click steps to track your progress.
Check the main power supply to the outdoor unit to ensure it is stable and within the specified voltage range.
Verify that the compressor wiring connections are secure and not damaged.
If the problem persists, a professional electrician or HVAC technician should inspect the power supply voltage and the outdoor power circuit board.
A system reset by turning off and on the main power might clear temporary glitches.
Avoid attempting to diagnose or repair internal electrical components yourself.