Kärcher HDS 3.9/30 Pe Cage Operator's Manual page 16

PROBLEM
BURNER
WILL
NOT LIGHT
(continued from
previous page)
FLUCTUATING
PRESSURE
MACHINE SMOKES
16
TROUBLESHOOTING
POSSIBLE CAUSE
Flex coupling slipping on fuel pump
shaft or burner motor shaft
On-Off switch defective
Heavy sooting on coil and burner can
cause interruption of air flow and
shorting of electrodes
Improper electrode setting
Fuel not reaching combustion
chamber
Clogged burner nozzle
Thermostat faulty or slow engine
speed
Flow switch malfunction
Flow solenoid malfunction
Valves worn
Blockage in valve
Pump sucking air
Worn piston packing
Gasoline engine altitude
Improper fuel or water in fuel
Improper air adjustment
Low fuel pressure
Plugged or dirty burner nozzle
Faulty burner nozzle spray pattern
Heavy accumulation of soot on coils
and burner assembly
Misaligned electrode setting
Obstruction in smoke stack
Low engine RPM
9.800-080.0 - G • HDS 600-606
SOLUTION
Replace if needed.
Check for electrical current reaching
burner assembly with burner switch on.
Clean as required.
Check and reset according to diagram in
Operator's Manual.
Check fuel pump for proper flow. Check
solenoid flow switch on machines with
spray gun control, for proper on-off fuel
flow control.
Clean as required.
Increase engine RPM to increase voltage.
Remove, test for continuity and replace as
needed.
Replace if needed.
Check and replace if necessary.
Check and replace if necessary.
Check water supply and air seepage at
joints in suction line.
Check and replace if necessary.
The gasoline engine is preset for operation
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.
Drain tank and replace contaminated fuel.
Readjust air bands on burner assembly.
Adjust fuel pump pressure to specifica-
tions.
Replace nozzle.
Replace nozzle.
Remove coils and burner assembly, clean
thoroughly.
Realign electrodes to specifications.
Check for insulation blockage or other
foreign objects.
Increase RPM