Cause | Elimination Method |
Electric motor not working | |
Damaged wires or oxidized wire connections | Check and repair connections. Replace damaged wires |
Blown fuse 1 in the mounting block | Replace fuse |
Heater switch damaged - no voltage applied to switch output terminals | Check switch, replace if necessary |
Hanging or wear of the motor brushes, a break in the armature winding or contamination of the collector | Check motor, repair or replace |
Short circuit to ground of the armature winding - when the motor is turned on, the fuse burns out | Replace motor |
Motor only runs at one speed | |
Damaged wires or oxidized wire connections | Replace damaged wires, clean wire ends |
Damaged heater switch | Replace Switch |
Auxiliary resistor burnt out | Replace resistor |
Motor armature rotates slowly | |
Collector contamination or oxidation, brush wear | Clean manifold, replace brushes |
Interturn short circuit in the armature winding | Replace motor |
Seizure of the armature shaft in the bearings | Disassemble the motor, clean the shaft journals |