Mitsubishi Heavy Industries · Air Conditioners
Both the red and green LEDs on the indoor unit are either continuously off or continuously on. This pattern points to a failure of the indoor unit's circuit board or its central processing unit (CPU).
Click steps to track your progress.
Perform a power cycle by turning off the air conditioner's main power switch for 5 minutes, then turning it back on.
Monitor the LED status after the power reset to see if the pattern clears.
If the LEDs remain in this state, it indicates a hardware fault that usually requires specialist attention.
Schedule a service appointment with a certified technician.