Check the drain valve of the machine is normal, so the judge the problem of drainage control circuit. Check the pile of BD2, diode rectifier bridge gradually VDl0, bidirectional thyristor VT3 VS3, transistor, resistor R15 and R3 and microprocessor IC (MN14021WPC), and other related components, found the bidirectional thyristor VS3 control G circuit. After replacement of VS3, commissioning, troubleshooting.teNservice manual download site
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