Troubleshooting - Kärcher HDS 3.9/30 Pe Cage Operator's Manual

PROBLEM POSSIBLE CAUSE
LOW
Faulty pressure gauge
OPERATING
Insufficient water supply
PRESSURE
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
BURNER Little or no fuel
WILL NOT
Improper fuel or water in fuel
LIGHT
Clogged fuel line
Plugged fuel filter
Misadjusted burner air bands
Little or no fuel pressure from fuel
pump
Faulty burner transformer
(continued on Disconnected or short in electrical
next page) wiring

TROUBLESHOOTING

9.800-080.0 - G • HDS 600-606
SOLUTION
Install new gauge.
Use larger supply hose; clean filter 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 teflon 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 specifications.
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 fill with proper fuel.
Clean or replace.
Replace as needed.
Readjust air bands for clean burn.
Increase fuel pressure to specification 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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