Kärcher HDS 645-4 M Basic Instruction Manual page 25

Device is not sucking in detergent
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 deter-
gent, it could be because of the following
reasons:
Filter in the detergent suck hose dirty
–
Clean filter.
Backflow valve stuck
–
Figure 13
Remove the detergent hose and loosen
the backflow valve using a blunt object.
Burner does not start
Fuel tank empty
–
Refill.
Water shortage
–
Check water supply, check connec-
tions, clean water shortage safeguard.
Fuel filter dirty
–
Change fuel filter.
Direction of rotation is wrong. With cor-
–
rect direction of rotation a strong airflow
can be felt out of the exhaust opening of
the burner.
Figure 14
Check direction of rotation. Exchange
the poles at the device plug, if required.
No ignition spark
–
If device is in use and no ignition spark can
be seen through the viewing glas, have de-
vice checked by customer service.
Set temperature is not achieved
while using hot water
Working pressure/flow rate to high
–
Reduce working pressure/flow rate
through regulating spindle (Figure 7).
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 our com-
petent sales company are applicable in
each country. We will repair potential fail-
ures of the appliance within the warranty
period free of charge, provided that such
failure is caused by faulty material or de-
fects in fabrication.
Accessories and Spare Parts
Only use accessories and spare parts
–
which have been approved by the man-
ufacturer. The exclusive use of original
accessories and original spare parts
ensures that the appliance can be oper-
ated safely and troublefree.
At the end of the operating instructions
–
you will find a selected list of spare parts
that are often required.
For additional information about spare
–
parts, please go to the Service section
at www.kaercher.com.
9
-
EN
Warranty
25