Sanyo washing machine washes and rinses normally, but the drainage fails. Source: Beijing Sanyo Washing Machine Repair Center http://blog.tianya.cn/blogger/blog_main.asp?BlogID=3442560.
Fault Analysis: The main cause of this fault is poor operation of the program control system. First, check the drainage electromagnet and door switch of this system, and their functions are completely normal. Then check the miniature motor, and it is found that the miniature motor is already damaged. The reasons for the damage of the miniature motor are as follows:
(1) Poor manufacturing quality of the miniature motor.
(2) Inflexible transmission of the减速机构with a jamming phenomenon.
(3) Excessive fluctuation of grid voltage, causing the micro-motor to be damaged.
Fault Maintenance: After replacing with a new miniature motor of the same specification and reliable quality, turn on the machine for testing. The washing machine works normally and the fault is eliminated.