Mitsubishi Electric · Air Conditioning
A single red flash from the operation indicator lamp usually points to a problem with the indoor fan motor. This could be a short or open circuit within the motor.
Click steps to track your progress.
Turn off the power supply to the unit.
Disconnect the indoor fan motor connector (CN211) from the control board.
Measure the resistance of the indoor fan motor using a tester.
If the resistance indicates a short or open circuit (refer to manual for specific values), replace the indoor fan motor.