Troubleshooting; Indicator Lamp - Kärcher HD 18/50-4 Cage Classic Originalbetriebsanleitung

Yearly or after 500 operating hours
Change the oil in the high pressure pump.
 For oil type refer to technical specifica-
tions.
 Turn out the oil drain screw.
 Drain the oil in a collection basin.
 Screw in oil drain plug.
 Fill in new oil slowly until the centre of
the oil level display.
Note:
Air pockets must be able to leak out.

Troubleshooting

You can rectify minor faults yourself with
the help of the following overview.
If in doubt, please consult the authorized
customer service.
DANGER
Risk of injury! Always switch off the appli-
ance and pull out the mains plug before
care and maintenance work.
WARNING
Repair work and work on the electrical
components may only be performed by an
authorised customer service.

Indicator lamp

The indicator lamps display the operating
states (green) and interruptions (red).
Reset:
 Set the appliance switch to "0".
 Wait for a while.
 Set the appliance switch to "I".
Operating status display
 Continuous green:
– The appliance is now ready for opera-
tion.
Fault indication
 Continuous red light:
– Water shortage
Appliance is not running
– No power
 Check whether the voltage indicated on
the type plate corresponds to the volt-
age of the socket.
 Check the mains connection cable for
damages.
22
– The water shortage safeguard was trig-
gered due to low water inlet pressure.
The indicator lamp "lack of water" will il-
luminate.
 Check water inlet pressure, minimum
value see "Specifications".
Turn the device switch to "0" and turn
on again to restart the system.
– Motor overloaded/overheated or the
motor circuit breaker has tripped.
 Switch off appliance and let it cool
down. Remove the cause of the prob-
lem. Turn on the appliance again.
Device is not building up pressure
– Wrong nozzle
 Check nozzle for correct size (see tech-
nical specifications).
– Flushed the nozzle.
 Clean/ replace nozzle.
– Filter is dirty.
 Clean filter at the water connection.
Unscrew the filter casing, remove the
filter, clean it and replace it.
– Air within the system
 Appliance ventilation:
Unscrew the nozzle. Switch on the ap-
pliance and let it run until the water ex-
iting from the spray pipe is bubble-free.
Switch off the appliance and fit the noz-
zle again.
– Pipe inlets to pump are leaky or blocked
 Check all supply lines to the pump for
leaks or blockages.
High pressure side is leaky
 3 drops per minute are permitted and
can come out from the lower side of the
appliance. Call Customer Service if
there is heavy leakage.
High pressure pump is vibrating
 Check all supply lines to the high-pres-
sure pump for leaks or blockages.
 Appliance ventilation:
Unscrew the nozzle. Switch on the ap-
pliance and let it run until the water ex-
iting from the spray pipe is bubble-free.
Switch off the appliance and fit the noz-
zle again.
– 8
EN