18
Maintenance
Troubleshooting
PROBLEM
CAUSE
SOLUTION
Loss of Power
Unit not plugged in
Connect unit to 3 prong grounded outlet.
Dead electrical circuit
Check building circuit breaker or fuse box.
Faulty power cord
Replace
Electrical shock
Receptacle not grounded
Contact an electrician to check building's wiring
Internal wiring problem
Have a trained service technician check
machine's wiring
Vac motor speed
varies or doesn't run
Vacuum circuit breaker tripped
Reset Breaker
Faulty vacuum motor
Replace
Faulty switch
Replace
Loss of vacuum
Loose vacuum dome
Center and seal dome over tank
Crack in dome of poor joint
Replace or repair using acrylic plastic cement
only
Lint or dirt clogging vacuum screen
With power off clean screen
Loose cuffs on vacuum hose
Tighten cuffs turning counterclockwise
Vac motor seals leaking
Replace
Floor tool vac chamber clogged
Wash out with hose. Pick lint out with a wire
Vacuum hose damaged
Replace
Recovery tank full / Float ball stuck in
the up position
Turn off power, drain recovery tank.
Pump runs no solution
Pump inlet screen plugged
Clean inlet screen
Pump not primed
Prime pump with priming hose
Internal or external solution line
damaged and leaking
Replace
Pump runs, loss of
pressure
Internal pump components wearing out Replace, see pump kit components
Check valves in pump head for particles
or cuts in seals
Take piston from BPR and lubricate with Super-
lube. If problem still exists change BPR kit
Pump will not run
Faulty switch
Replace
Loose wiring
Repair or replace
Solution hose fitting
hard to connect
Corrosion on fittings.
Clean with steel wool. Soak in acetic acid (white
vinegar). Lubricate lightly with silicone base
lubricant.
Carpet not getting
clean
Severe soil conditions
Make several passes at right angles to each
other. Use a pre-spray.
Carpet too wet
Over saturation
Adjust solution pressure to lower settings. Make
several passes without spray
Carpet browning
Leaving carpet too wet
Check for loss of vac pressure
Too much chemical
Check label for correct solution concentration
Solution not flowing
properly
Solution hose connection
Check for positive connection
Faulty pump
Repair or replace
Faulty floor tool valve / Nozzle
Repair or replace
Faulty pump switch
Repair
86399150 Operators Manual - Dominator 500 PSI 17 Gallon
