This machine in the process of water, try to break the power supply, can endure the water stop, enemy water circuit system is normal, face check inlet valve and normal. Suspect the fault on the program controller, with multimeter ac voltage, inlet valve output measurement between two sockets have 220 v ac voltage, so right. Check the bidirectional thyristor VS4 respectively, crystal camp VT4 C24 R16 and R4, resistance and capacitance, related components such as found VS4 breakdown short circuit. After replacement VS4, commissioning, troubleshooting.ZGbservice manual download site