open in winding

low applied voltage

defective bearing

supply failure

1

2

3

4

1.3 m

2.0 m

2.25 m

2.40 m

defective or leaky capacitor

open in regulator resistor / switch

worn out bearing and absence of grease

low applied voltage

series to the starting winding

parallel to the starting winding

series to the main winding

parallel to the main winding