Troubleshooting; Fault Display Via Indicator Lamps; Appliance Is Not Running; Device Is Not Building Up Pressure - Kärcher HDS-E 8/16-4 M Series Service Manual

7

Troubleshooting

Danger
Risk of injury by inadvertent startup of appliance and
electrical shock.
Adhere to the electrical safety instructions when
working on the electrical system of the appliance.
Disconnect the appliance from power, secure against
inadvertent connection and ensure that no voltage is
flowing to the appliance.

7.1 Fault display via indicator lamps

See Chapter "Function/operating panel/indicator
lamps".

7.2 Appliance is not running

No power
–

Check power connection/conduit.

7.3 Device is not building up pressure

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 ac-
celerated.

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).
7.4 Device leaks, water drips from the bot-
tom of the device
Pump leaky
–
Note: 3 drops/minute are allowed.
Note: Condensate can cause increased drop gener-
ation on the device.
7.5 Device turns on and off while hand
spray gun is closed
Leak in the high pressure system
–

Check high pressure system and connections for
tightness.

7.6 Device is not sucking in detergent


Leave the appliance running with open detergent
dosing valve and closed water supply, until the
boiler 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.

7.7 Boiler does not heat up

System care bottle empty.
–

Replace the system care bottle.
Water shortage
–

Check water supply, check connections.
Heating element is defective.
–
7.8 Set temperature is not achieved while
using hot water
Working pressure/flow rate to high
–

Reduce working pressure/flow quantity at the
pressure/volume regulator in the pump unit.
English 5.906-548.0 Rev. 00 (04/12)
85