Troubleshooting - Kärcher HE-201006D Operator's Manual

PRObLEM
PUMP RUNNINg
NORMALLy bUT
PRESSURE LOW ON
INSTALLATION
fLUCTUATINg
PRESSURE
PRESSURE LOW
AfTER PERIOD Of
NORMAL USE
PUMP NOISy
PRESENCE Of WATER
IN PUMP OIL
WATER DRIPPINg
fROM UNDER PUMP
WATER DRIPPINg fROM
PUMP PROTECTOR
OIL DRIPPINg
ExCESSIvE vIbRATION IN
HIgH PRESSURE HOSE
MOTOR DOES NOT START
WHEN SWITCHED ON
WHEN SWITCHINg ON THE
MACHINE, MOTOR HUMS
bUT DOES NOT RUN
MOTOR STOPS
10

TROUbLESHOOTINg

POSSIbLE CAUSE
Pump sucking air
Check valves sticking
Unloader valve seat faulty
Nozzle incorrectly sized
Worn piston packing
Valves worn
Blockage in valve
Pump sucking air
Worn piston packing
Insufficient water
Nozzle worn
Suction or delivery valves worn
Suction or delivery lines blocked
Unloader valve seat worn
Worn piston package
Water temperature excessive
Air in suction line
Broken or weak suction or delivery
valve spring.
Foreign matter in valves
Worn bearings
Water temperature excessive
Oil seal worn
High humidity in air
Piston packing worn
Piston packing worn
O-ring plunger retainer worn
Water supply pressure too high
(over 90 psi)
Spray gun is in the off position for over
1- minutes
Oil seal worn
Irregular functioning of the pump
valves
Plug not well connected or lack of
power supply
Main voltage is insufficient, lower than
the minimum required.
The pump is stuck or frozen
Tripped thermal overload due to over-
heating
9.800-088.0 • REV. 0/08
SOLUTION
Check water supply and possibility of air seep-
age.
Check and clean or replace if necessary.
Check and replace if necessary.
Check and replace if necessary.
Check and replace if necessary.
Check and replace if necessary.
Check and replace if necessary.
Check water supply connections.
Check and replace if necessary.
Check filter and hose for breakage/clogging
Check and replace if necessary.
Check and replace if necessary.
Check and clean if necessary.
Check and replace if necessary.
Check and replace if necessary.
o
Reduce to below 140 F.
Check water supply and connections on suction
line.
Check and replace if necessary.
Check and clean if necessary.
Check and replace if necessary.
Reduce to below 160 o F.
Check and replace if necessary.
Check and replace if necessary.
Check and replace if necessary.
Check and replace if necessary.
Check and replace if necessary.
Lower water supply pressure using regulator.
Turn machine off if not in use for over 1- min-
utes.
Check and replace if necessary.
Check and replace if necessary.
Check plug, cable and switch.
Check to make sure main power supply is
adequate.
Check by turning the motor manually.
Check that main voltage corresponds to specifica-
tions for the machine. Wait a few minutes before
turning on the machine again by resetting the
GFCI on the cord.