Reason:

(1) The power cord and fuse are blown.

(2) Poor contact of plug or switch

(3) The motor is damaged or the coil is open.

Maintenance method:

(1) Check the line

(2) Copy the plug.

(3) Replace the motor

2, when using abnormal noise

Reason:

(1) The distance between the fixed core and the moving core is too close.

(2) The rubber pad between two iron cores is damaged or lost.

Maintenance method:

(1) Adjust the distance between the fixed core and the movable core.

(2) Or replace the damaged rubber pad.