Mitsubishi Electric · Air Conditioning
The left lamp of the OPERATION INDICATOR blinks three times, followed by a 2.5-second pause. This indicates that the rotational frequency feedback signal was not emitted during the indoor fan operation.
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Turn OFF the power supply to the unit.
Refer to Section 9-6, 'Check of indoor fan motor,' for specific troubleshooting instructions.
Contact a qualified technician if the issue persists after basic checks.