9.803-436.0-B • Operator Kärcher HDS Diesel
PRESSURE
W
ASHER
T
roub
leshooting Guide
16
TROUBLESHOOTING
PROBLEM
POSSIBLE CAUSE
SOLUTION
OIL DRIPPING
Oil seal worn
Check and replace if necessary.
EXCESSIVE
VIBRATION IN
DELIVERY LINE
Irregular functioning of the valves
Check and replace if necessary.
DETERGENT
NOT DRAWING
Air leak
Tighten all clamps. Check detergent lines for
holes.
Restrictor in fl oat tank is missing
Replace restrictor. Check for proper orifi ce in
restrictor.
Filter screen on detergent suction
hose plugged
Clean or replace.
Dried up detergent plugging
metering valve
Disassemble and clean thoroughly.
High viscosity of detergent
Dilute detergent to specifi cations.
Hole in detergent line(s)
Repair hole.
Low detergent level
Add detergent, if needed.
PUMP RUNNING
NORMALLY BUT
PRESSURE LOW
ON INSTALLATION
Pump sucking air
Check water supply and possibility of air seep-
age.
Valves sticking
Check and clean or replace if necessary.
Nozzle incorrectly sized
Check and replace if necessary (See serial
plate for proper size).
Unloader valve seat faulty
Check and replace if necessary.
Worn piston packing
Check and replace if necessary.
BURNER
MOTOR WILL
NOT RUN
Fuel pump seized
Replace fuel pump.
Burner fan loose or misaligned
Position correctly, tighten set screw.
Defective control switch
Replace switch.
Loose wire
Check and replace or tighten wiring.
Defective burner motor
Replace motor.
RELIEF VALVE
LEAKS WATER
Relief valve defective
Replace or repair.
