11
6. Maintenance
In order to avoid damage to the cleaner, only
use products that have been approved by
Kärcher.
• Fully dissolve the contents of one bag of
Kärcher Biological Decalcifier RM 511 in one
litre of warm water.
• Pour this solution into the boiler and leave it
to react for approx. 8 hours.
Do not screw the safety cap (A2) onto the cle-
aner while you are descaling the boiler. Do not
use the cleaner if there is any descaling liquid
left inside the boiler.
• After the period of soaking, pour the des-
caling solution out of the boiler. A small
amount will remain inside, therefore you
should flush the boiler out with cold water
two or three times in order to remove all tra-
ces of the decalcifying agent.
• The steam cleaner is now ready for use
again.
6.2 Care of accessories
• Allow all accessories to dry out thoroughly
before you store them for use another time.
• Do not stand the floor nozzle (G1), hand
nozzle (F1) and circular brush (E1) on their
bristles while they are cooling down and
drying out, otherwise they could become
deformed.
• Floor cloth and terry-towelling slip-on have
been pre-washed and can be used imme-
diately with the steam cleaner.
• Dirty floor cloths and terry-towelling slip-ons
can be placed in a washing machine at
60 °C and dried in a tumble dryer. Do not
use a liquid softener as this would impair the
ability of the cloths to pick up dirt.
6.3 What to do if a problem occurs
• If a problem occurs with your steam cleaner,
contact your local Kärcher service agent
(see address list on backside).
7. Safety devices
This steam cleaner is equipped with several
safety devices which provide multiple levels of
safety. The most important safety devices are
described below.
7.1 Pressure controller
The pressure controller maintains the level of
pressure inside the boiler as constant as pos-
sible. When the maximum operating pressure
inside the boiler of 2.7 bar is reached, the hea-
ter is switched off. When steam is drawn off
and the pressure drops, the heater is switched
on again.
7.2 Low-water thermostat
As the water in the boiler is used up, the tem-
perature of the heater increases. The low-wa-
ter thermostat switches the heater off and the
red low-water warning lamp illuminates. The
heater is prevented from switching on again
until the boiler has either cooled down or has
been refilled with water.
7.3 Safety thermostat
If the low-water thermostat fails and the clea-
ner overheats, the safety thermostat will
switch off the cleaner. Contact your local
Kärcher service agent so that the safety ther-
mostat can be reset.
7.4 Safety cap
The safety cap seals in the steam pressure as
it builds up inside the boiler. If the pressure
controller is defective and the steam pressure
inside the boiler rises above 4.0 bar, an over-
pressure valve opens inside the safety cap
and steam is discharged into the open. Con-
tact your local Kärcher service agent before
you attempt to use the cleaner again.
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