Karcher HDS 7-12-4 M - Manual (Page 36)

– 12
– The exhaust temperature limiter has
been triggered.
 Set the appliance switch to "0/OFF“.
 Allow device to cool down.
 Turn on the appliance.
– Error occurs repeatedly.
 Inform Customer Service
– The flame sensor turned the burner off.
 Inform Customer Service
– System care detection defective
 Inform Customer Service
– Temperature sensor defective
 Inform Customer Service
– Service interval
 Perform service work.
– Fuel tank empty.
 Refill fuel.
Note: Burner can operate 5 more hours.
– System care bottle empty.
 Replace the system care bottle.
Note: Burner operation no longer possible.
– System care bottle empty.
 Replace the system care bottle.
– Detergent tank 1 is empty.
 Refill detergent.
– Detergent tank 2 is empty.
 Refill detergent.
– No power
 Check power connection/conduit.
– 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 accelerated.

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 neces-
sary.
– Amount of water supply is too low.
 Check water supply level (refer to tech-
nical data).
– Pump leaky
Note: 3 drops/minute are allowed.

With stronger leak, have device
checked by customer service.
– Leak in the high pressure system
 Check high pressure system and con-
nections for tightness.
Indicator lamp burner failure
1x blinking
2x blinking (option)
3x blinking
4x blinking
Indicator lamp service
Fuel indicator lamp glows
Indicator lamp system care is
illuminated
Indicator lamp system care is
blinking
Indicator lamp detergent 1 is
illuminated (HDS 12/18 only)
Indicator lamp detergent 2 is
illuminated (HDS 12/18 only)
Appliance is not running
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
36 EN