Rotor Open Or Short Circuit
- Adjust ohmmeter to x1 scale. With rotor removed, place ohmmeter probes on a rotor slip ring. Reading should be 2.0-3.5 ohms. Reading exceeding specification indicates damaged slip ring solder connection or broken wire.
- Reading lower than specification indicates shorted wire or slip ring. Replace rotor if damaged. Place one ohmmeter probe on slip ring and remaining probe on rotor shaft.
- Meter reading should not be obtained. If reading is obtained, rotor is shorted to shaft. Ensure slip ring terminals or solder is not touching rotor shaft. This causes a shorted condition. Replace rotor if shorted.