Mitsubishi Electric · Air Conditioning
The upper operation indicator lamp blinks three times with a 2.5-second pause. This error means the rotational frequency feedback signal is not being detected from the indoor fan motor during operation.
Click steps to track your progress.
Refer to the section 'Check of indoor fan motor'.
Examine the wiring and connections to the indoor fan motor.
Replace the indoor fan motor if it is malfunctioning.