OPERATION
12
Tennant 1520 (10–01)
TROUBLE SHOOTING
PROBLEM
CAUSE
SOLUTION
No power
Faulty main power switch.
Contact Service Center.
Power cord disconnected.
Connect power cord.
Faulty power supply cord.
Replace power supply cord.
Building circuit breaker has tripped.
Determine cause and reset circuit breaker
in building.
Brush motor does not
Pump switch is not activated.
Turn on pump switch.
operate
Control grips are not rotated.
Rotate control grips.
Brush circuit breaker has tripped.
Remove obstruction from brush and reset
brush circuit breaker button.
Faulty brush motor or wiring.
Contact Service Center.
Carbon brushes worn.
Contact Service Center.
Loose or broken belt.
Replace, or contact Service Center.
Vacuum motor does not
Faulty vacuum switch.
Contact Service Center.
operate
Vacuum motor thermal overload activated.
Remove obstruction and wait 20 minutes
for motor to cool.
Faulty vacuum motor or wiring.
Contact Service Center.
Carbon brushes worn.
Contact Service Center.
Drive motor does not
Drive motor circuit breaker has tripped.
Determine cause and reset breaker.
operate
Faulty speed control board or connection.
Contact Service Center.
Faulty drive motor.
Contact Service Center.
Faulty wiring.
Contact Service Center.
Worn carbon brushes.
Contact Service Center.
Drive motor operates, but
not correctly
Faulty potentiometer or speed control
board.
Contact Service Center.
Loose wire connection.
Contact Service Center.
Uneven or no solution spray
Twist–out spray tips are plugged.
Remove and clean.
Control grips are not rotated.
Rotate control grips.
Solution line or solution tank filter is
clogged.
Remove hose and blow compressed air
through it. Flush solution tank after each
use.
Inline strainer filter is plugged.
Drain solution tank, remove filter and
clean. Located under machine at rear.
Faulty pump switch.
Contact Service Center.
Faulty pump or solenoid.
Contact Service Center.
