Operating instructions

20
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
86399050 Operators Manual - Dominator 500 PSI 13 gallon