Kärcher HDS 9/50 De Tr1 Service Manual page 31

 Close the supply tap of the water tanks and the drain
tap.
With unit types HDS 13/20 and HDS 17/20:
 Set the detergent dosing valve to the maximum dosing
level.
 Take the detergent suction lance out of the container
and put it down in a way that it can be sucked empty in
the frost protection mode.
NOTE
The solenoid valve of the detergent is always opened in
the frost protection mode irrespective of the filling level, so
that the entire detergent line can be sucked empty.
1 Water pipes
2 High pressure hose
 Disconnect the trigger gun from the high-pressure
hose.
 Connect the high-pressure hose to the frost protection
inlet.
 Disconnect the water hose from the water supply.
 Connect the water hose to the return flow of the frost
protection.
 Open the filling hole of the float container. In order to do
so, loosen the wing screw and push the cover to the left.
 Fill 20 litres of antifreeze into the float container and
close the filling hole.
 Align the actuation lever of the ball tap for antifreeze
vertically.
 Set the operating mode switch to the operating mode
"frost protection".
 With cold engine only:
To preheat the motor, turn the key switch to the left and
hold it until the indicator light preheating goes out.
 Turn key switch to position "I". The indicator lamp for
operational readiness lights up.
The control voltage is switch on and the display shows
the operating status "Antifreeze".
 Turn the key switch to the right until the motor is run-
ning.
English 5.906-736.0 Rev. 00 (07/15)
31