Trouble Shooting - Minuteman MC32036QP Operation And Service Manual

TROUBLE SHOOTING

1. Inefficient scrubbing - floors are smeared in appearance.
Solution: Use proper type and correct amount of detergent. Replace worn or damaged scrub
attachments. Increase force on scrubbing head.
2. Squeegee streaks.
Solution: Check rear squeegee rubber for imbedded objects, clean; reverse, or replace if worn or
damaged. Make sure scrub solution is being fed onto brush properly. Use more scrubbing solution.
Replace well-worn scrubber attachments.
3. Odor development.
Solution: Inspect and clean thoroughly the vacuum tank, solution tank, squeegee, vacuum motor,
vacuum hose. NOTE: Super Staph-Trole 256 disinfectant cleaner can be helpful in reducing odors.
4. Vacuum not picking up.
Solution: Water lift should be 60-65" with fully charged batteries. Check seals around vacuum motor
and hose connections. Check vacuum tank drain hose and plug to insure seal. Check hoses for
holes. Clean out squeegee inlet and check squeegee rubbers for severe wear. Make sure solution is
properly feeding into scrubhead attachments. Clean and/or repair vacuum motor.
5. Charger malfunction.
Solution: Consult maintenance and repair data contained in brochure herewith for detailed
information. In general, make sure charger is put in upright position when charging - this helps keep
unit cool. Do not cover charger when it is in use. Make sure connectors on inlet and outlet cords are
not broken. Check AC input voltage - it should be 110 volts, 120 volts, maximum. Replace faulty
fuses, ammeter, timer, or other components, when necessary.
6. Use cycle too short.
Solution: Check voltage on batteries after full charging; output voltage should be 43-45 volts with
specific gravity at 1.260-1.265. Check battery electrolyte level. Check for loose or corroded battery
leads and connections. Replace batteries that will not hold a charge. Lubricate casters. Reduce
scrubbing pressure. Check brushes on motors, especially on vacuum motor. Replace brushes on
motors when needed. Test charger for output, it may need repair.
7. Motors will not start or run.
Solution: Check battery leads and connection for corrosion and looseness; correct if required.
Check switches for proper contacting; replace if required. Check motor brushes; replace brushes or
motors if required.
8. Speed control does not function.
Solution: The speed control has built-in protection to guard against reversed connections, check
battery connections. Machine locked in high or low speed. Inspect entire speed control for burn
marks of components that have broken. These would be caused by a direct short in the circuit.
Replace entire control as needed.
7