Mitsubishi Electric · MSZ-AP Air Conditioners
The indoor unit's upper lamp blinks six times, indicating an issue with the outdoor unit's thermistors. The outdoor thermistors are detected as short-circuited or open-circuited during compressor operation.
Click steps to track your progress.
Turn off the air conditioner at the main power supply breaker.
Wait for at least 30 seconds, then turn the main power supply back on.
Ensure the outdoor unit is clear of debris or blockages that might interfere with sensor operation or lead to overheating.
If the error reappears, contact a qualified service technician, as outdoor thermistor inspection and replacement require specialized tools.