Beijing Xiaotian'e Washing Machine After-sales Service Telephone Center, released on September 23, 2011.
Xiaotian'e Washing Machine, the principle and maintenance of automatic power-off switch
The automatic power-off switch is mostly used in fully automatic washing machines. It can not only manually complete the connection and disconnection of power supply, but also be controlled by an electronic program controller. After the entire program of the washing machine is completed, it automatically cuts off the power supply. Common faults of automatic power-off switches include:
(1) The power cannot be connected after pressing the button. This phenomenon is caused by poor contact of the contacts. The contacts should be polished and repaired.
(2) The power cannot be disconnected after pressing the button. This fault is caused by the contacts being burnt and stuck together. Sandpaper should be used to polish them. If the fault cannot be eliminated after treatment, the automatic power-off switch should be replaced.
(3) Cannot automatically cut off power. In addition to mechanical reasons, it is generally because the electromagnetic coil is burned out or short-circuited, resulting in the inability to attract the armature, so the contacts cannot disconnect. At this time, the electromagnet or the entire switch can only be replaced.