Mitsubishi Electric · MSZ-AY Air Conditioners
The upper lamp on the indoor unit blinks 14 or more times. This indicates a general or unspecified abnormality in the outdoor unit, which could stem from various issues including thermistor problems.
Click steps to track your progress.
Turn off the unit's main power supply, wait a few minutes, then turn it back on.
If the problem persists, contact a service technician for a detailed diagnosis.
The technician may need to use the 'Flow chart of the detailed outdoor unit failure mode recall function' and check all thermistors.