Kärcher HDS 3.9/30 Pe Cage Operator's Manual page 25

PROBLEM
OIL
DRIPPING
EXCESSIVE
VIBRATION IN
DELIVERY LINE
DETERGENT
NOT DRAWING
PUMP RUNNING
NORMALLY BUT
PRESSURE LOW
ON INSTALLATION
BURNER
MOTOR WILL
NOT RUN
RELIEF VALVE
LEAKS WATER
Karcher HDS 600-606 Operator's Manual 9.800-080.0-AC
POSSIBLE CAUSE
Oil seal worn
Irregular functioning of the valves
Air leak
Restrictor in float tank is missing
Filter screen on detergent suction
hose plugged
Dried up detergent plugging
metering valve
High viscosity of detergent
Hole in detergent line(s)
Low detergent level
Pump sucking air
Valves sticking
Nozzle incorrectly sized
Unloader valve seat faulty
Worn piston packing
Fuel pump seized
Burner fan loose or misaligned
Defective control switch
Loose wire
Defective burner motor
Relief valve defective
SOLUTION
Check and replace if necessary.
Check and replace if necessary.
Tighten all clamps. Check detergent lines for
holes.
Replace restrictor. Check for proper orifice in
restrictor.
Clean or replace.
Disassemble and clean thoroughly.
Dilute detergent to specifications.
Repair hole.
Add detergent, if needed.
Check water supply and possibility of air
seepage.
Check and clean or replace if necessary.
Check and replace if necessary
(See serial plate for proper size).
Check and replace if necessary.
Check and replace if necessary.
Replace fuel pump.
Position correctly, tighten set screw.
Replace switch.
Check and replace or tighten wiring.
Replace motor.
Replace or repair.
Maintenance
25