Mitsubishi Electric · City Multi Air Conditioning Systems
This error indicates a problem with the current sensor during backup operation. This typically means there is an issue with the sensor's circuit, or components like the fan inverter board or outdoor fan itself are faulty.
Click steps to track your progress.
Turn off the power to the outdoor unit at the circuit breaker.
Check the output wiring from the fan board for proper and secure connection.
Inspect the outdoor unit fan for any obstructions or signs of malfunction.
Restore power and observe if the unit resumes operation. If the problem persists, contact a qualified technician.
A technician will need to inspect the current sensor circuit, fan inverter board, and the outdoor fan.