Koldwater Training Software
Training Applications for the Electrical Controls Industry
Check feed connections to control system and from control to motor.
Check source of power. Check overloads, fuses, controls, etc.
Check voltage supply and ascertain that voltage remains within 10% of the rated voltage shown on the motor nameplate.
Compare connections with the wiring diagram on the motor nameplate.
Tighten all connections.
Try to start motor under no-load conditions. If it starts mechanical load on motor may be too high. Ambient temperature too high. verload may be defective, or winding may be shorted or grounded
Check capacitor, if bad, replace.
Brushes may be worn, dirty or incorrectly fitted.