Kärcher BPP 3000/42 Originalbetriebsanleitung Seite 19

Fault Cause
Pump switches Thermal protection fuse has
itself off and switched the pump off to pro-
back on (BPP tect from overheating or turned
4000/48 and it back on after it has cooled
BPP 4500/50) off.
Motor starts up Pressure is not retained in the
immediately af- system
ter switch off
Air pressure in the storage
boiler is too low.
Backflow valve does not close
properly
Membrane in pressure tank is
defective
Pump trans- Suction filter or backflow valve
ports is reduc- contaminated
ing or
The quantity transported by
transported
the pump depends on the
quantity is too
transport height and the con-
low
nected periphery
Pre-filter is dirty
Vibrating sound Membrane in pressure tank vi-
while taking out brates
water
Our Kärcher branch will be pleased to help you further in the case of questions or faults.
See address on the reverse.
Remedy
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. Refer
to Chapter "Maintenance" Figure A
Check backflow valve on suction side.
Replace membrane
Clean suction filter or backflow valve
Keep max. flow height, see technical
data. If necessary, select a different
hose diameter or hose length.
Remove the pre-filter and clean it un-
der flowing water.
Noise caused by operations and the
noise can be reduced by reducing the
pressure in the air filling of the storage
tank.
– 7
EN 19