R
Richard ArmstrongAug 8, 2025
What to do if check code 'EO' appears on Mitsubishi Electric Air Conditioner when remote controller power button is turned on?
- CCalvin McbrideAug 8, 2025
If the check code 'EO' appears on your Mitsubishi Electric Air Conditioner when you turn on the remote controller, it may indicate a signal transmission error between the indoor unit and the remote controller. To address this, connect a sub remote controller and turn the circuit breaker ON. If the 'centrally controlled' display remains, replace the indoor controller board. If the display disappears, turn the remote controller POWER button ON and check as follows.