Troubleshooting - Kärcher HDS 5.6/35 De Cage Operator's Manual

PROBLEM
LOW OPERATING
PRESSURE
BURNER WILL
NOT LIGHT
(continued on next
page)

TROUBLESHOOTING

POSSIBLE CAUSE
Faulty pressure gauge
Insuffi cient water supply
Old, worn or incorrect spray nozzle
Belt slippage
Plumbing or hose leak
Faulty or misadjusted unloader
valve
Worn packing in pump
Fouled or dirty inlet or discharge
valves in pump
Worn inlet or discharge valves
Obstruction in spray nozzle
Leaking pressure control valve
Slow engine RPM
Pump sucking air
Valves sticking
Unloader valve seat faulty
Little or no fuel
Improper fuel or water in fuel
Clogged fuel line
Plugged fuel fi lter
Misadjusted burner air bands
Little or no fuel pressure from fuel
pump
Faulty burner transformer
Disconnected or short in electrical
wiring
9.803-436.0-B • Operator Kärcher HDS Diesel
SOLUTION
Install new gauge.
Use larger supply hose; clean fi lter at water
inlet.
Match nozzle number to machine and/or
replace with new nozzle.
Tighten or replace; use correct belt.
Check plumbing system for leaks. Retape
leaks with tefl on tape.
Adjust unloader for proper pressure. Install
repair kit when needed.
Install new packing kit.
Clean inlet and discharge valves.
Replace with valve kit.
Remove obstruction.
Rebuild or replace as needed.
Set engine speed at proper specifi cations.
Check water supply and possibility of air
seepage.
Check and clean or replace if necessary.
Check and replace if necessary.
Fill tank with fuel.
Drain fuel tank and fi ll with proper fuel.
Clean or replace.
Replace as needed.
Readjust air bands for clean burn.
Increase fuel pressure to specifi cation and/or
replace fuel pump. Test with pressure gauge.
Test transformer for proper arc between
contacts. Replace as needed.
All wire contacts should be clean and tight.
No breaks in wire.
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