Kärcher HDS 7/9-4 M, Original Instructions Manual

Page: 27 / 372

– 8
– Air within the system
Vent pump:
 Set dosing value for detergent to "0".
 With open hand spray gun turn device on and off
multiple times with the device switch.
 Open and close the pressure/quantity regulation at
the pump unit with the hand spray gun open.
Note: By dismantling the high pressure hose from the
high pressure connection the venting process is accel-
erated.
 If detergent tank is empty, refill.
 Check connections and conduits.
– Pressure is set to MIN
 Set pressure to MAX.
– Sieve in the water connection is dirty
 Clean sieve.
 Clean the fine filter; replace it, if necessary.
– Amount of water supply is too low.
 Check water supply level (refer to technical data).
– Pump leaky
Note: 3 drops/minute are allowed.
 With stronger leak, have device checked by cus-
tomer service.
– Leak in the high pressure system
 Check high pressure system and connections for
tightness.
 Leave device running with open detergent dosage
valve and closed water supply, until the swimmer
tank is sucked empty and the pressure falls to "0".
 Open the water supply again.
If the pump still is not sucking in any detergent, it could
be because of the following reasons:
–
Filter in the detergent suck hose dirty

Clean filter.
– Backflow valve stuck
 Remove the detergent hose and loosen the back-
flow valve using a blunt object.
– System care bottle empty.
 Replace the system care bottle.
– Fuel tank empty.

Refill fuel.
– Water shortage
 Check water supply, check connections.

Clean sieve in the water shortage safe guard.
– Fuel filter dirty
 Change fuel filter.
– No ignition spark
 If device is in use and no ignition spark can be seen
through the viewing glass, have device checked by
customer service.
– Working pressure/flow rate to high
 Reduce working pressure/flow quantity at the pres-
sure/volume regulator in the pump unit.
– Sooty heating spiral
 Have device de-sooted by customer service.
If malfunction can not be fixed, the device must be
checked by customer service.
The warranty terms published by the relevant sales
company are applicable in each country. We will repair
potential failures of your appliance within the warranty
period free of charge, provided that such failure is
caused by faulty material or defects in manufacturing. In
the event of a warranty claim please contact your dealer
or the nearest authorized Customer Service centre.
Please submit the proof of purchase.
Note: When connecting the appliance to a chimney or if
the device cannot be accessed visually, we recommend
the installation of a flame monitor (option).
Only use original accessories and spare parts, they en-
sure the safe and trouble-free operation of the device.
For information about accessories and spare parts,
please visit www.kaercher.com.
Device is not building up pressure
Device leaks, water drips from the bottom of
the device
Device turns on and off while hand spray gun
is closed
Device is not sucking in detergent
Burner does not start
Set temperature is not achieved while using
hot water
Customer Service
Warranty
Accessories and Spare Parts
27 EN