Power failure is one of the most common issues during the operation of solenoid valves. When power related codes such as E01 and E10 appear, it usually indicates that the supply voltage exceeds the normal operating range. This may be caused by fluctuations in the power grid, poor contact of power lines, or damage to power modules. Specifically manifested as high voltage, low voltage, or power phase error. When dealing with such faults, a multimeter should be used first to check the actual power supply voltage, confirm whether it meets the rated requirements of the equipment, and check whether the power supply wiring is firm and reliable.