Case Analysis of Beijing LG Washing Machine Repair; Washing Machine Agitator Not Spinning
Fault Symptoms: After reaching the preset water level, the water intake stops, but the agitator does not spin, and there is no humming sound from the motor.
Analysis and Inspection: The automatic water intake is normal, indicating that the water level detection control system and the program controller are functioning well. It is suspected that the motor has burned out, there is damage to an element in the transmission system, or there is a fault with a component in the output control section of the electronic program controller. Since there is no humming sound from the motor, the focus is on checking the motor and the two thyristors V36 and V37 that control the forward and reverse rotation of the motor. This machine uses a YXD150 single-phase capacitor-run motor. Using a multimeter, the DC resistance of its main and auxiliary windings was measured to be 17Ω, which is normal. Next, check V36 and V37; it was found that the measurements between T1 and G, as well as T1 and T2, show an open circuit. Due to simultaneous damage to V36 and V37, this resulted in no voltage input to the motor, preventing it from rotating.
Repair Measures: After replacing the bidirectional thyristors with the same specifications, the fault was resolved.
Source of Article: http://blog.tianya.cn/blogger/blog_main.asp?BlogID=3446020.