Karcher HDS 1-7-12 U Ed - Manual (Page 13)

– 8
 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.
– 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.
– 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.
– Leak in the high pressure system
 Check high pressure system and con-
nections for tightness.
– Pump leaks, safety valve not tight.
Note: 3 drops/minute are allowed.

With stronger leak, have device
checked by customer service.
– 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.
– 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.
Device is not building up pressure
Device continuously turns on and
off while hand spray gun is open
Device turns on and off while hand
spray gun is closed
Device leaks, water drips from the
bottom of the device
Device is not sucking in detergent
Burner does not start
13 EN