Maintenance And Care; Frost Protection - Kärcher K 3.91 M Betriebsanleitung

Maintenance and care

Danger
Turn off the appliance and remove the mains
plug prior to any care and maintenance work.
Maintenance
The appliance is maintenance-free.
Storage
Prior to longer periods of storage, e.g. in the win-
ter:
Completely drain all water from the appli-
ance: Switch the appliance on with detached
high-pressure hose and detached water sup-
ply (max. 1 minute) and wait, until no more
water exits at the high-pressure connection.
Turn off the appliance.
Remove filter from suction hose for deter-
gent and clean under running water.
Pull out the sieve in the water connection us-
ing flat-nose pliers and clean under running
water.
Pull out the fine filter in water connection us-
ing flat-nose pliers and clean with running
water.

Frost protection

Caution
Protect the appliance and its accessories against
frost.
The appliance and its accessories can get de-
stroyed through frost if there are any water resi-
dues in them. To avoid damage to them:
Store the appliance and the entire accesso-
ries in a frost-safe room.
Spare parts
Use only original KÄRCHER spare parts. You
will find a list of spare parts at the end of these
operating instructions.
Troubleshooting
You can rectify minor faults yourself with the help
of the following overview.
If in doubt, please consult the authorized cus-
tomer service.
Danger
Turn off the appliance and remove the mains
plug prior to any care and maintenance work.
Repair works may only be performed by the au-
thorized customer service.
Appliance is not running
Check whether the voltage indicated on the
type plate corresponds to the voltage of the
mains supply.
Check the mains connection cable for dam-
ages.
Pressure does not build up in the appliance
Check setting at the spray lance.
Appliance ventilation: Switch the appliance
on with the high-pressure hose detached
and operate until the water flows through the
high-pressure connection without bubbles.
Switch off appliance and reconnect high-
pressure hose.
Check the water supply.
Pull out the sieve in the water connection us-
ing flat-nose pliers and clean under running
water.
Pull out the fine filter in water connection us-
ing flat-nose pliers and clean with running
water.
Appliance does not start, motor hums
Cause: Voltage reduction due to weak mains
supply or when using an extension cable.
When switching on, first pull the lever of the
trigger gun and then switch the appliance
switch to "I/ON".
Strong pressure fluctuations
Clean high-pressure nozzle: Remove dirt
and debris from the nozzle bore, using a
needle and rinse through with water from the
front.
Check water flow quantity.
Appliance is leaking
Slight leakage from the appliance pump is
normal. If the leakage increases contact the
authorized customer service.
No detergent infeed
Use spray lance with pressure regulation
(Vario Power).
Turn the spray lance to "Mix" position.
Clean the detergent suction hose filter.
Check the detergent suction hose for kinks.
13
English