OPERATION
Tennant 1220 (05–99)
7
TROUBLE SHOOTING
PROBLEM
CAUSE
SOLUTION
Machine does not operate.
Faulty switches or wiring.
Contact Service Center.
Faulty power cord.
Contact Service Center.
Building circuit breaker tripped.
Reset breaker.
Solution pump does not operate.
Overheated pump.
Determine cause and wait 20 minutes
for pump to cool. Reset breaker.
Faulty solution pump.
Contact Service Center.
Faulty solenoid.
Contact Service Center.
Faulty switch.
Contact Service Center.
Loose or broken wiring.
Contact Service Center.
Vacuum motor does not operate.
Vacuum motor thermal overload
tripped.
Check air flow for obstruction, wait 20
minutes for motor to cool.
Vacuum motor circuit breaker tripped.
Reset breaker.
Loose or broken wiring.
Contact Service Center.
Faulty Master switch.
Contact Service Center.
Defective vacuum motor.
Contact Service Center.
Worn carbon brushes.
Replace brushes or call for service.
Brush motor does not operate.
Brush motor circuit breaker tripped.
Remove brush obstruction OR
readjust brush height. Reset brush
breaker button at bottom of switch
box.
Carpet Cleaning Switch not pushed.
Push Carpet Cleaning Switch.
Faulty brush motor.
Contact Service Center.
Loose or broken brush belt.
Contact Service Center.
Faulty switch or wiring.
Contact Service Center.
Poor pick up.
Open drain valve.
Close valve.
Clogged standpipe screen in recovery
tank.
Remove recovery dome and clean lint
off screen.
Air leakage around recovery dome.
Tighten recovery dome knobs or
replace gaskets.
Loose vacuum hose connections.
Secure connections.
Defective vacuum hose.
Replace hose.
Loose vacuum hose cuffs.
Secure cuffs to hose.
Pulling machine too fast.
Slow down cleaning process.
Uneven or no spray.
Dirty or plugged spray tips.
Clean or replace tips.
y
Improper spray tip size or spray angle.
Replace with proper tips.
Worn spray tips.
Replace spray tips.
Solution tank low or empty.
Refill solution tank.
Faulty solution pump.
Contact Service Center.
Plugged solution tank filter.
Clean filter.
Drain valve leaks.
Drain valve gaskets worn.
Replace gaskets.
Lint or dirt in drain valve.
Clean valve.
