Minuteman ERide 21, Service Manual

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7.7 TROUBLESHOOTING
THE BRUSH DOES NOT ROTATE
Possible causes can be:
1. Large debris or cords around the brush or between the brush and its
attachment flange (remove the brush and remove debris or cords)
2. Blown fuse for motor (replace/check for cause of overload)
3. Electric motor with the worn carbons (replace the electric motor carbons)
4. Faulty brush relay (replace if defective)
5. Electric motor in the event of a failure (repair or replace the electric motor)
6 El t i b d f ti d d ( l it if d f ti ) 6. Electronic board functions damaged (replace it if defective)
7. Damaged wiring (repair it)
THE BRUSH DOES NOT REACH THE "RAISED" or "LOWERED" POSITION .
Possible causes can be:
1. Electric actuator to raise/lower brush head, broken (replace it)
2. Actuator wiring interrupted (check the wiring)