The Mijia Air Conditioner displays the error code U8.2, which means the outdoor unit PFC software is overcurrent, which is caused by unstable voltage. It can also be caused by problems such as the outdoor unit’s electronic control panel. Wait until the voltage stabilizes and then try to turn on the air conditioner. If the voltage is unstable for a long time, please install a voltage stabilizer. If the problem cannot be solved by the above method, it is recommended to apply for after-sales inspection.