Karcher KB 3.99 M - Manual (Page 9)

English 9
You can rectify minor faults yourself with
the help of the following overview.
If in doubt, please consult the authorized
customer service.
ƽ
Danger
Turn off the appliance and remove the
mains plug prior to any care and mainte-
nance work.
Repair works may only be performed by the
authorized customer service.
Î Check whether the voltage indicated on
the type plate corresponds to the volt-
age of the mains supply.
Î Check the mains connection cable for
damages.
Î Check setting at the spray lance.
Î Appliance ventilation: Switch the appli-
ance on with the high-pressure hose de-
tached and operate until the water flows
through the high-pressure connection
without bubbles. Switch off appliance
and reconnect high-pressure hose.
Î Check the water supply.
Î Pull out the sieve in the water connec-
tion using flat-nose pliers and clean un-
der running water.
Cause: Voltage reduction due to weak
mains supply or when using an extension
cable.
Î When switching on, first pull the lever of
the trigger gun and then switch the ap-
pliance switch to "I/ON".
Î Clean high-pressure nozzle: Remove
dirt and debris from the nozzle bore, us-
ing a needle and rinse through with wa-
ter from the front.
Î Check water flow quantity.
Î Slight leakage from the appliance pump
is normal. If the leakage increases con-
tact the authorized customer service.
Î Use spray lance with pressure regula-
tion (Vario Power).
Turn the spray lance to "Mix" position.
Î Clean the detergent suction hose filter.
Î Check the detergent suction hose for
kinks.
Troubleshooting
Appliance is not running
Pressure does not build up in the appli-
ance
Appliance does not start, motor hums
Strong pressure fluctuations
Appliance is leaking
No detergent infeed