What to do if the Mijia Air Conditioner displays error code U0(U0.0/ U0.1/ U0.2/ U0.3)?

The display of U0 on the Mijia Air Conditioner indicates an electrical control voltage fault in the outdoor unit, caused by excessive voltage fluctuations.
You can try to wait until the voltage stabilizes and then restart the device to see if it can be restored. If the voltage is unstable over a long period, please install a voltage stabilizer.
If the above methods fail to resolve the issue, it is recommended to apply for after-sales service for an onsite inspection.