Troubleshooting - Hotsy 558 Series Dealer's Manual

Maintenance

Troubleshooting

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