Fault Analysis: First, manually rotate the drainage knob, it feels very smooth and the knob can stay at any position. Based on this, it is judged that the drainage knob might be damaged. After removing the drainage knob for inspection, it was found that the keyway of the knob was damaged beyond repair. After replacing the drainage knob and conducting a power-on test, the machine still failed to drain.
Source: Beijing Sanyo Washing Machine Repair Phone http://blog.tianya.cn/blogger/blog_main.asp?BlogID=3442560.
Fault Inspection: After removing the operation panel, it was found that the drainage lever was rusted solid and could not rotate. The drainage lever was replaced during the Sanyo washing machine repair process. Upon operational testing, the drainage lever rotated smoothly and functioned normally. A drainage test was conducted, which showed that the machine could drain but took too long. The drainage filter and overflow device were removed, and the drainage knob was rotated to check the drainage valve. It was discovered that there were many impurities at the drainage outlet. After clearing out the impurities, the operation panel and drainage knob were reinstalled. A power-on test was conducted, and the washing machine functioned normally, resolving the fault.
Sanyo semi-automatic washing machine, drainage malfunction