Mitsubishi heavy o mitsubishi electric
Remote controller wires X and Y are reversely connected. For wire breaking at power ON, the LED is OFF. X wire breaking : A beep is produced and no indication mitsubishi heavy o mitsubishi electric made.
LCD flashes continuously or is off. The remote controller wire Y is open. X and Y are reversely connected. The remote controller or indoor control PCB is faulty. Inverter primary side current is abnormal. 52C secondary side L3-phase wiring is open. Compressor loader position detection error.