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DANGER
To avoid risks, all repairs and replacement of spare parts may only be carried out by authorized customer service
personnel.
First pull out the plug from the mains before carrying out any tasks on the machine.
Fault
Pump runs but does
not transport
Pump does not run or
suddenly comes to a
standstill during oper-
ations
Pump switches itself
off and back on
Motor starts up imme-
diately after switch off
Pump transports is re-
ducing or transported
quantity is too low
Vibrating sound while
taking out water
Our Kärcher branch will be pleased to help you further in the case of questions or faults. See address on the reverse.
Troubleshooting
Cause
Air in the pump
Air does not come out on the pressure
side
No water available.
Power supply interrupted
Thermal protection switch in the motor
has switched off the pump as it was over-
heated.
Thermal protection fuse has switched the
pump off to protect from overheating or
turned it back on after it has cooled off.
Pressure is not retained in the system
Air pressure in the storage boiler is too
low.
Backflow valve does not close properly
Membrane in pressure tank is defective
Suction filter or check valve (special ac-
cessories) contaminated
The quantity transported by the pump de-
pends on the transport height and the
connected periphery
Membrane in pressure tank vibrates
Remedy
see chapter "Preparing the Appliance"
Open tap on pressure side
Check the water reservoir.
Check fuses and electrical connections
Pull out the mains plug, let the pump cool down,
clean the suction area, prevent dry running
Note
The cooling down time until the motor starts up
again can be up to 150 min.
In order to prevent a repetition, the system should
be checked for leaks and sealed.
Check connections including sealings and control
the water outlet.
The smallest of leakages can affect the operation
adversely.
Fill storage boiler with 2.0 bar. See chapter "Main-
tenance"
Check backflow valve on suction side.
Replace membrane
Clean suction filter or check valve (special acces-
sories)
Keep max. flow height, see technical data. If nec-
essary, select a different hose diameter or hose
length.
Noise caused by operations and the noise can be
reduced by reducing the pressure in the air filling of
the storage tank.
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EN
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