Kärcher HDS 5.0/30 Ed, Operator'S Manual

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Karcher • HDS 650 • 9.800-081.0 • Rev. 5/10a
PRESSURE WASHER Troubleshooting Guide
12
TROUBLESHOOTING
PREVENTATIVE MAINTENANCE
PROBLEM POSSIBLE CAUSE SOLUTION
LOW WATER
TEMPERATURE Improper fuel or water in fuel Drain fuel tank and replace with proper fuel.
Low fuel pressure Increase fuel pressure.
Weak fuel pump Check fuel pump temperature. Replace
pump if needed.
Fuel filter partially clogged Replace as needed.
Soot build up on coils Clean coils with soot remover.
Lime build up on coils Clean inside of coils using coil cleaner.
Improper burner nozzle See specifications.
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 (thermo-
stat) Replace.
Incorrect fuel nozzle size See Burner Nozzle section.
Insufficient water supplied Check GPM to machine.
Restricted water flow Check nozzle for obstruction, proper size
MAINTENANCE SCHEDULE
Machine Clean Daily
Water Lines Check Daily
Fittings Check Daily
Fuel Filter Clean Weekly
Inlet Strainer Clean Weekly
Fuel Nozzle Clean Weekly
Fuel Tank Clean Weekly
Electrodes Adjust Monthly
Fuel Pump Strainer Clean Monthly
Electrode Wires Check Monthl