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24
Maintenance
PROBLEM POSSIBLE CAUSE SOLUTION
BURNER
WILL NOT
LIGHT
Thermostat faulty or slow engine
speed
Increase engine RPM to increase voltage.
Flow switch malfunction
Remove, test for continuity and replace as
needed.
Flow solenoid malfunction Replace if needed.
FLUCTUATING
PRESSURE
Valves worn Check and replace if necessary.
Blockage in valve Check and replace if necessary.
Pump sucking air
Check water supply and air seepage at joints in
suc- tion line.
Worn piston packing Check and replace if necessary.
Gasoline engine altitude
The gasoline engine is preset for opera-
tion at altitudes below 1000 ft above sea
level. If operated at higher altitudes, it may be
necessary to install a high altitude main jet in the
carburetor. Contact your local authorized engine
sales and service center for details.
MACHINE SMOKES
WHILE BURNER
UNIT IS RUNNING
OR
UNIT SMOKES AT
COLD-START ONLY
WHEN BURNER IS
OFF
Improper fuel or water in fuel Drain tank and replace contaminated fuel
Improper air adjustment Readjust air bands on burner assembly
Fuel pressure is low <140 psi for
burner
Adjust fuel pump pressure to specifications
Burner nozzle is plugged or dirty
Replace nozzle. Check parts breakdown for
nozzle size
Burner nozzle spray pattern is faulty
Replace nozzle. Check parts breakdown for
nozzle size
Heavy accumulation of soot on coils
and burner assembly
Remove coils and burner assembly, clean thor-
oughly Call local dealer
Misaligned electrode setting Realign electrodes to specifications
Obstruction in smoke stack
Check for insulation blockage or other foreign
objects
Low engine RPM Increase RPM to correct specs. See serial plate
Fuel Pressure is too high for clean burn
(fuel PSI above 140 and below 200)
and smokes when burner is off
Reduce fuel pressure PSI/Increase air band set
for cleaner without max water heat loss
LOW WATER
TEMPERATURE
Improper fuel or water in fuel Replace with clean and proper fuel.
Low fuel pressure Increase fuel pressure.
Weak fuel pump
Check fuel pump pressure. Replace pump if
needed.
Fuel filter partially clogged Replace as needed.
Soot build-up on coils not allowing heat
transfer
Clean coils.
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 See specifications for proper fuel pressure.
Fuel pump defective Replace fuel pump.
RELIEF VALVE
LEAKS WATER
Relief valve defective Replace or repair
Kärcher SSG Operator’s Manual 9.801-193.0 - BF
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