Mitsubishi Electric · MSZ-AP Air Conditioners
The upper lamp of the indoor unit's Operation Indicator blinks seven times in a pattern. This indicates a general problem with the outdoor unit's control system, often related to the inverter or outdoor electronic control P.C. board.
Click steps to track your progress.
Turn OFF the main power supply to the air conditioner.
Wait for at least 30 seconds to allow the outdoor unit's control system to reset.
Turn the main power supply back ON.
If the 7-time blinking persists, this suggests a more serious fault with the outdoor unit's control components, requiring professional repair.