Karcher HD 9-50-4 - Manual (Page 22)

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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".
 Continuous green:
– The appliance is now ready for opera-
tion.
 1x blinking green:
– Operational readiness has expired after
30 minutes.
– The appliance has switched off after 30
minutes of continuous operation (safety
if the high pressure hose bursts).
 Continuous red light:
– Electrical problems in appliance
 Pull out the mains plug.
 Call Customer Service.
 1x blinking red:
– High pressure side is leaky
 Check high pressure hose, hose con-
nections and hand spray gun for leaks.
 2x blinking red:
– Engine overload/overheat
 Set the appliance switch to "0".
 Allow device to cool down.
 Set the appliance switch to "I".
– Water pressure is too low
 Ensure adequate water line pressure.
 3x blinking red:
– Fault in the voltage supply
 Check main connections and mains
fuse.
 4x blinking red:
– Power consumption is too high
 Call Customer Service.
– 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.
– Indicator lamp is blinking green
 Operational readiness period has ex-
pired. Switch on/off the appliance
again.
– The water shortage fuse (option) was
triggered due to low water inlet pres-
sure.
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/ over-heated or elec-
trical circuit breaker or winding protec-
tion switch has got released.
 Switch off appliance and let it cool
down. Remove the cause of the prob-
lem. Turn on the appliance again.
– 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.
Indicator lamp
Operating status display
Fault indication
Appliance is not running
Device is not building up pressure
22 EN