OPERATION
Tennant 5400 (07--02)
31
TROUBLESHOOTING
PROBLEM
CAUSE
SOLUTION
Machine will not operate.
Faulty key switch.
Contact Service Center.
Batteries need charging.
See CHARGING BATTERIES.
Faulty battery(s).
Replace battery(s).
Loose battery cable.
Tighten loose cable.
MAIN circuit breaker has tripped.
Determine cause and reset breaker.
Optional power kill button activated.
Turn button clockwise to reset.
Brush motors will not operate.
Faulty brush switch.
Contact Service Center.
Control grips not rotated.
Rotate grips.
Brush circuit breaker has tripped.
Replace pad or adjust pad pressure
and reset brush circuit breaker button.
Faulty brush motor or wiring.
Contact Service Center.
Worn carbon brushes.
Contact Service Center.
Faulty brush solenoid.
Contact Service Center.
Vacuum motor will not operate.
Faulty vacuum switch.
Contact Service Center.
Squeegee is raised off floor.
Lower squeegee.
Main circuit breaker has tripped.
Remove obstruction and reset circuit
breaker button.
Vacuum motor circuit breaker has
tripped.
Determine cause and reset circuit
breaker button.
Faulty vacuum motor or wiring.
Contact Service Center.
Worn carbon brushes.
Contact Service Center.
Little or no solution flow.
Solution switch is not activated.
Turn on solution switch.
Clogged solution line or solution tank
filter.
Remove hose and blow compressed
air through it. Flush solution tank after
each use.
Clogged solution valve or solenoid.
Remove valve or solenoid and clean.
Do not scratch inside of valve.
Faulty solution switch or solenoid.
Contact Service Center.
Solution flow knob not activated.
Turn solution flow knob.
Loose set screw on solution knob.
Calibrate knob and tighten screw.
Poor Scrubbing Performance.
Brushes/pads out of adjustment.
See ADJUSTING SCRUB HEAD.
Worn Brushes/pads.
Replace brushes/pads.
Debris caught in brushes/pads.
Remove debris.
Low tire pressure.
Increase tire pressure.
Low battery charge.
Charge batteries.
Incorrect brush/pad pressure.
Readjust brush/pad pressure.
Broken Brush belt (cylindrical brush).
Replace belts.
Poor Drive Traction.
Pad pressure set too high.
Decrease brush pressure.
Tires slipping.
Contact distributor for advice.
Uneven brush pressure.
Level scrub head.
Broken brush belt (cylindrical brush).
Replace belt.