Kärcher HDS 1.7/12 U Ed Operating Instructions Manual page 13

 Have device de-sooted by customer
service.
The exhaust temperature limiter has
–
been triggered, exhaust temperature
too high.
 Set the appliance switch to "0/OFF".
 Allow device to cool down.
 Only in devices with manual reset:
Illustration
Press reset button of the exhaust tem-
perature limiter.
 Turn on the appliance.
 If malfunction still occurs, have device
checked by customer service.
Device is not building up pressure
Air within the system
–
Vent pump:
 With open hand spray gun turn device
on and off multiple times with the device
switch.
Note: By dismantling the spray lance from
the hand spray gun, the venting process is
accelerated.
 Fill/replace external detergent contain-
er if empty.
 Check connections and conduits.
Filter in the water connection is dirty
–
 Clean filter.
Amount of water supply is too low.
–
 Check water supply level (refer to tech-
nical data).
Water tap is closed.
–
 Open tap.
Device continuously turns on and
off while hand spray gun is open
Air within the system
–
Vent pump:
 With open hand spray gun turn device
on and off multiple times with the device
switch.
Note: By dismantling the spray lance from
the hand spray gun, the venting process is
accelerated.
High-pressure nozzle clogged
–
 Clean the nozzle.
Heating coil has heavy calcium depos-
–
its
 Have the device decalcified by custom-
er service.
Device turns on and off while hand
spray gun is closed
Leak in the high pressure system
–
 Check high pressure system and con-
nections for tightness.
Device leaks, water drips from the
bottom of the device
Pump leaks, safety valve not tight.
–
Note: 3 drops/minute are allowed.
 With stronger leak, have device
checked by customer service.
Device is not sucking in detergent
Nozzle is set to "High pressure"
–
 Set nozzle to "CHEM".
External detergent container is empty.
–
 Fill/replace external detergent container.
Filter at the detergent suction hose dirty
–
 Clean filter.
Illustration
Backflow valve stuck
–
 Remove the detergent hose and loosen
the backflow valve using a blunt object.
Burner does not start
Fuel tank empty.
–
 Refill fuel.
Water shortage
–
 Check water supply, check connec-
tions.
Water flow temperature too hot.
–
 Fill in water with a max. temperature of
86°F/30°C.
Illustration
Fuel filter dirty
–
 Change fuel filter.
– 8
EN 13