Troubleshooting - Kärcher HD 5 12 Service Manual

HD 5/12

Troubleshooting

Fault
Unit not running
Unit does not become
pressurised
Unit constantly switches on
and off with handgun closed
Unit won't switch off when
the handgun is closed
Cleaning agent is not drawn
in
Water escapes between the
cylinder head and piston
housing
Oil escapes between the
cylinder head and piston
housing
New Unit Information 02.2004
Solution
– Check/replace mains voltage, connection cable and mains
fuse.
– Check/replace unit switch.
– Check/replace pressure switch.
– Check/replace overflow valve.
– Check/replace motor.
– Check/increase water inlet volume.
– Clean/replace water inlet strainer.
– Bleed unit.
– Check/replace high-pressure hose.
– Check cylinder head for leaks and replace as necessary.
– Check/replace overflow valve.
– Check/replace handgun and o-rings at high-pressure hose
for leaks.
– Check/replace cleaning agent non-return valve.
– Check/replace pressure/suction valves for leaks.
– Check/replace overflow valve.
– Check/replace non-return valve.
– Check/replace pressure switch.
– Check/replace overflow valve.
– Check/replace non-return valve.
– Check/replace pressure switch.
– Clean/replace cleaning agent non-return valve.
– Check/replace cleaning agent nozzle.
– Replace injector.
– Clean/replace cleaning agent strainer.
– Check replace metering valve.
– Check replace high-pressure and low-pressure seals.
– Replace the oil seals.
Troubleshooting
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