Troubleshooting; when turning on the power and operating the drainage switch, a tingling sensation was felt by hand. At this point, it was checked that there was no electricity in the water inside the washing tub, the grounding wire was in good condition, and the leakage protection switch did not act. Observing the drainage switch, it was found that there were water droplets around the drainage switch. After testing, it was discovered that the drainage switch was electrified. After cutting off the power, the control panel was opened for inspection. It was found that the buzzer was rusted, and there were water droplets from the drainage switch to the buzzer. After removing the electromagnetic reed buzzer, it was found that both the outer insulation paper of the 220V power supply coil and the internal enameled wire were damaged. During use, water flowed from the buzzer to the drainage switch, causing the drainage switch to be electrified. After replacing the buzzer, the machine was tested and the washing machine worked normally, resolving the fault.
Siemens Washing Machine, Electrical Leakage During Drainage
Data Source: Siemens Washing Machine After-sales Service in Beijing http://blog.tianya.cn/blogger/blog_main.asp?BlogID=3432932.
Fault Analysis: This fault was caused by electrical leakage from a component in the drainage system.