Second, the method is determined that the auxiliary winding is broken or the capacitor is damaged, and the motor is not started.
After the single-phase capacitor is started and the motor is turned on, it does not start and there is almost no sound. If it is measured with an ammeter, there is a certain current. At this time, apply the multimeter resistance (R × 1) file to check whether the auxiliary winding circuit is unreachable. The reason for the failure is that the winding or wiring is broken, or the capacitor is broken.
In the absence of a multimeter, the following simple method can be used to check whether the auxiliary winding or capacitor has an open circuit fault.
In the case of power failure, short-circuit the two electrodes of the capacitor with a wire or other conductive device (such as a screwdriver) to discharge, to prevent the battery from being stored in the case of no damage to the capacitor, and to cause electric shock when the human body is in contact (if there is A strong discharge phenomenon can eliminate the problem of capacitor damage). After that, untie the connection between the capacitor and the motor and wrap it in an insulating material.
Remove the load of the motor (for example, remove the drive belt. For loads that require less starting torque, if it is difficult to remove the load, do not remove it), then energize the motor (pay attention to insulation work), by hand (or Tool) Twist the shaft in order to rotate it in one direction, as shown below. If the rotor of the motor rotates at this time, it automatically accelerates until it reaches the normal speed. After the power is turned off, the motor shaft extension is rotated in the opposite direction. If the motor rotor is also rotated in the same direction, it is basically determined that the auxiliary winding or the capacitor is not activated due to the open circuit. Then further check that there is an open circuit fault in the capacitor or the winding (including the wiring).
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