20
Maintenance
Troubleshooting
SYMPTOM
POSSIBLE CAUSES
CORRECTIVE ACTION
PUMP MOTOR WILL
NOT RUN
GFCI tripped
Reset and test GFCI with every use.
See symptom
"GFCI tripped"
.
No voltage to machine
Test power supply and correct.
Pump motor reset button (thermal
overload protector) tripped
Push reset button on control box. If tripped,
check for proper voltage or clogged pressure
nozzle.
Excessive pressure due to clogged
relief valve
Clean relief valve seat.
NO WATER SPRAYS
FROM PRESSURE
NOZZLE
Pressure nozzle completely clogged
Clean pressure nozzle.
Inlet water screen clogged
Check screen and clean if necessary.
Pump sucking air
Fill the detergent container and check for loose
hose clamps or fittings.
LOW PRESSURE
FROM PRESSURE
NOZZLE
Inlet water screen clogged
Check screen and clean if necessary.
Pressure nozzle worn or incorrect size Replace nozzle with proper size.
Water supply low
Correct water supply.
Pump sucking air
Fill the detergent container and check for loose
hose clamps or fittings.
POOR OR NO
DETERGENT FLOW
Low detergent level
Fill the detergent container.
Detergent screen clogged
Clean if necessary.
Detergent injector valve not opening
Check that handle or knob is not slipping
on shaft.
Pressure nozzle clogged
Clean pressure nozzle.
Excessive inlet pressure (more than 80
PSI)
Adjust detergent injector valve.
See instructions under
To Clean
.
PRESSURE
RELIEF VALVE
LEAKING
Excessive pressure due to unloader
valve over adjusted
Call qualified service technician to adjust
or replace unloader valve.
Defective relief valve
Replace relief valve.
BURNER WILL NOT
IGNITE WHEN
TRIGGER GUN IS
OPEN
Defective pressure switch
Replace pressure switch.
No gas
Check gas supply.
No pilot
Check that indicator light is on.
Thermostat set too low or defective
Raise thermostat setting. Replace if defective.
Gas valve not open
After pilot light is on, turn gas valve ON/OFF
knob to ON position, then turn burner switch on.
Hotsy 558 DEALER 9.801-536.0 - R
