Mitsubishi Electric · City Multi Air Conditioning Systems
This error indicates an overcurrent condition caused by a short-circuited motor within the system, likely associated with the Inverter Power Module (IPM). It's a critical electrical fault requiring immediate attention.
Click steps to track your progress.
Immediately switch off the main power supply to the outdoor unit at the circuit breaker.
Do not attempt to power the unit back on, as this could cause further damage or safety hazards.
Contact a qualified HVAC technician or electrician to diagnose the short-circuited motor and associated inverter/compressor components.
The technician will check the fan inverter board and outdoor unit fan for proper operation.
This type of electrical fault requires professional tools and expertise for safe and effective repair.