Troubleshooting - Kärcher HDS 2.0/10 Ed Cage Operator's Manual

PROBLEM POSSIBLE CAUSE
LOW OPERATING
Faulty pressure gauge
PRESSURE
Insufficient water supply
Old, worn or incorrect spray nozzle
Plumbing or hose leak
Faulty or mis-adjusted unloader valve
(where applicable)
Worn packing in pump
Fold or dirty inlet or discharge valves in pump
Worn inlet or discharge valves
DETERGENT NOT Air leak
DRAWING
Valve in the injector head may be blocked, dirty,
or damaged
Filler screen on detergent suction hose plugged
Dried up detergent plugging metering valve
High viscosity of detergent
Hole in detergent line(s).
Low detergent level
Discharge water temperature above 180° F
PUMP RUNNING Pump sucking air
NORMALLY BUT
Valves sticking
PRESSURE LOW
Unloader valve seat faulty
ON INSTALLATION
Nozzle incorrectly sized
Worn piston packing
FLUCTUATING Valves worn
PRESSURE
Blockage in valve
Pump sucking air
Worn piston packing
PUMP NOISY
Air in suction line
Broken or weak inlet or discharge valve springs Check and replace if necessary.
Excessive matter in valves
Worn bearings
LOW WATER
Improper fuel or water in fuel
TEMPERATURE
Low fuel pressure
Weak fuel pump
Fuel filter partially clogged
Soot build up on coils
Lime build up on coils
Improper burner nozzle
WATER Incoming water to machine warm or hot
TEMPERATURE
Fuel pump pressure too high
TOO HOT
Fuel pump defective
Detergent line sucking air
Defective high limit switch (thermostat)
Insufficient water supplied
Restricted water flow
24

TROUBLESHOOTING

SOLUTION
Install new gauge.
Use larger garden hose; clean filter washer at water inlet.
Match nozzle number to machine and/or replace with new
nozzle.
Check plumbing system for leaks. Re-tape leaks with teflon
tape.
Adjust unloader for proper pressure. Install repair kit when
needed.
Install new packing kit.
Clean inlet or discharge valves.
Replace with valve kit.
Tighten all clamps. Check detergent lines for holes.
Clean or replace valve in injector.
Clean or replace.
Disassemble and clean thoroughly.
Dilute detergent to specifications.
Repair hole.
Add detergent if needed.
Lower discharge water temperature.
Check water supply and possibility of air
Check and clean or replace if necessary.
Check and replace if necessary
Check and replace if necessary (see serial plate for proper size).
Check and replace if necessary.
Check and replace if necessary.
Check and replace if necessary.
Check water supply and air see page at joints in suction line.
Check and replace if necessary.
Check water supply and connections on suction line.
Check and clean if necessary.
Check and replace if necessary.
Drain fuel tank and replace with proper fuel.
Increase fuel pressure.
Check fuel pump temperature. Replace pump if needed.
Replace as needed.
Clean coils with soot remover.
Clean inside of coils using coil cleaner.
Call technical service for proper size.
Lower incoming water temperature.
Lower fuel pressure.
Replace fuel pump.
Tighten all clamps. Check detergent line for holes.
Replace.
Check GPM to machine.
Check nozzle for obstruction, proper size.
9.800-191.0 • Rev. 05/14