Put the digital multimeter gear in the Ω gear 2kΩ gear, […]
Put the digital multimeter gear in the Ω gear 2kΩ gear, the fan motor is single-phase AC 220v, start with the starting capacitor, the motor has two windings, one is the starting winding, one is the running winding; the starting windingWall Fan Motors resistance is larger, the running winding The resistance is smaller. There are 3 actual motor outlets. The DC resistance between the three wires is measured by a multimeter. The maximum value is the resistance of the starting winding + the running winding, the second is the resistance of the starting winding, and the resistance of the running winding is again.
In the 20M Ω gear position, measure the insulation resistance between the winding (using any one of the three wires of the motor) and the stator core of the motor. The resistance should be above 2MΩ, and the motor can be judged to have only problems.