HOTSY 965SS-1075SS • 9.807-621.0 • Rev. 09/18
PRESSURE WASHER Troubleshooting Guide
16
TROUBLESHOOTING
SYMPTOM
POSSIBLE CAUSES
CORRECTIVE ACTION
POOR OR NO
DETERGENT FLOW.
Inadequate detergent supply.
Refill detergent container. Ensure that
pick-up screen is fully immersed. Open
detergent valve.
Detergent screen or hose clogged.
Clean. Always start with a clean detergent
container.
Detergent injector valve not set
correctly.
Refer to To Clean for settings.
Clogged detergent injector check valve. Clean check valve at detergent injector inlet
POOR CLEANING.
Improper detergent concentration or
mixing.
Mix detergent per manufacturer’s instruc
-
tions. Ensure that powdered detergents are
fully dissolved.
Wrong detergent for the application.
Select appropriate detergent.
Rinsing with hot water.
A final rinse with cold water will reduce
water spotting.
MACHINE
SMOKES
Improper fuel or water in fuel
Drain tank and replace contaminated fuel.
Improper air adjustment
Readjust air bands on burner assembly.
Low fuel pressure < 140 PSI
Adjust fuel pump pressure to specifica
-
tions.
Weak fuel pump
Check fuel pump pressure. Replace pump
if needed.
Fuel filter partially cogged
Replace as needed.
Soot build up on coils
Clean coils with soot remover.
Lime build
up in coils
Clean inside of coils using Landa's coil
cleaner.
Improper burner nozzle
See combustion assembly breakdown.
Electrode is misaligned
Realign electrodres to specs.
Fuel pressure is to high for clean burn
(Fuel PSI above 140 but less than 200)
Reduce fuel PSI / increase air and band
set for cleaner burn without max water
heat loss.
WATER
TEMPERATURE
TOO HOT
Incoming water to machine warm or hot Lower incoming water temperature.
Fuel pump pressure too high
Lower fuel pressure.
Fuel pump defective
Replace fuel pump.
Detergent line
sucking air
Tighten all clamps. Check detergent line
for holes.
Defective high limit switch
Replace.
Incorrect fuel nozzle size
See exploded view parts list for proper size.
Insufficient water supplied
Check G.P.M. to machine.
Restricted water flow
Check nozzle for obstruction, proper size.
A) SMOKES
WHILE UNIT IS
RUNNING
B) SMOKES AT
COLD-START
WHEN BURNER
IS OF
AB
AB
AB
AB
AB
AB
AB
AB
AB
B
