Karcher HD 9-18-4 ST - Manual (Page 22)

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Note:
The appliance is equipped with a pressure
switch. The motor starts up only when the
lever of the pistol is pulled

Open the water supply.
 Plug in the mains plug.
(Only with appliance versions with pow-
er cable and mains plug).
 Set the appliance switch to "I".
The indicator lamp glows green.
 Unlock the trigger gun and pull the lever
of the gun.
 Set working pressure and water quanti-
ty by turning (rungless) at the pressure
and quantity regulation (option) (+/-).
 Close the hand spray gun.
 Turn the casing of the nozzle till the de-
sired symbol matches the marking.
ṇ CAUTION
Unsuitable detergents can cause damage
to the appliance and to the object to be
cleaned. Use only those detergents that
have been approved by Kärcher. Observe
the dosage and other instructions provided
with these detergents. For considerate
treatment of the environment use detergent
economically.
Follow the safety instructions for using de-
tergents.
Kärcher detergents ensure smooth func-
tioning. Please consult us or ask for our cat-
alogue or our detergent information sheets.

Place the detergent can under the de-
vice.
 Hang in the detergent hose into the de-
tergent can.
 Set nozzle to "CHEM".
 Set dosing value for detergent to the
desired concentration.
 Spray the detergent sparingly on the
dry surface and allow it to react, but not
to dry.
 Spray off loosened dirt with the high-
pressure ray.
 After operations, dip the filter in clear
water. Turn the dosing valve to the
highest detergent concentration. Start
the appliance and rinse for one minute.
 Release the lever of the trigger gun; the
device will switch off.
 Release again the lever of the trigger
gun; the device will switch on again.
The operational readiness period starts
when the hand-spray gun is closed. The
device can no longer be started by tighten-
ing the lever of the hand-spray gun if this
operational readiness period (5 to 0.120
minutes) expires.
The indicator lamp blinks green.

To restart, turn the device switch briefly
to "0" and then again to "I".
Note:
Customer service can set the operational
readiness period.
 Set the appliance switch to "0".
 Wait for a while.
 Set the appliance switch to "I".
or

Use the respective button on the re-
mote control (option).
 Set the appliance switch to "0".
 Disconnect the mains plug from the
socket.
(Only with appliance versions with pow-
er cable and mains plug).
 Shut off water supply.
 Activate trigger gun until device is pres-
sure-less.
 Press the safety lever of the trigger gun
to secure the lever of the pistol against
being released accidentally.
ATTENTION
Frost will destroy the not completely water
drained device.
The machine should be stored in frost-free
rooms. In case there is frosting risk, for e.g.
if the machine is installed in open areas,
then the machine must first be emptied and
flushed using an anti-freezing agent.
 Remove the water inlet hose on the ap-
pliance.
 Unscrew the high pressure hose from
the appliance.
 Let the appliance run till the pump and
pipes are empty (max. 1 minute).
In case of longer operational breaks:

Fill in normal anti-frost agents in the
swimmer tank right until the top.
 Place the collection trough unter the
high pressure exit.
 Turn on the equipment and let it run un-
til the equipment is completely rinsed.
 Turn the emergency-stop switch to "0".
 Shut off water supply.
 Activate trigger gun until device is pres-
sure-less.
 Unscrew the fastening screw of the ap-
pliance cover.
 Slightly lift up the appliance cover and
remove it toward the front.
ṇ CAUTION
Risk of injury and damage! Observe the
weight of the appliance when you transport
it.

When transporting in vehicles, secure
the appliance according to the guide-
lines from slipping and tipping over.
ṇ CAUTION
Risk of injury and damage! Note the weight
of the appliance in case of storage.
ƽ DANGER
Risk of injury! Switch off the power switch
with all maintenance and repair work.
Pull the mains plug and secure it against
being plugged in again
ƽ DANGER
Risk of injury on account of the emanating
water jet that could be hot!
During all tasks:
– Close locking tap of fresh water.
– Let the hot parts of the plant cool down.
– Depressurise the plant by opening all
hand-spray guns.
The bases of a safe operating of the equip-
ment is thr regularly maintenance accord-
ing to the following maintenance plan.
Use exclusively original parts of the manu-
facturer or those parts recommended by
him like
– replacement and wear parts
– Accessory parts
– Fuel
– Detergent
High pressure operation
Select spray type
High pressure circular spray
(0°) for specially stubborn dirt
Flat low pressure spray
(CHEM) for operating using de-
tergents or cleaning at low
pressure.
High pressure flat spray (25°)
for large dirt areas
Operation with detergent
Recommended cleaning method
Interrupting operation
Operational readiness period
Restart the operation readiness time
Turn off the appliance
Frost protection
Emptying the appliance
Switch-off in case of emergency
Remove the appliance cover
Transport
Storing the device
Maintenance and care
22 EN