08
english
IVB 3-H
IVB 5-H
IVB 7-H
4.4 Acoustic
warning
For safety reasons, an acoustic
warning sounds if the air speed
in the suction hose drops to be-
low 20 m/s. See section “Trou-
bleshooting”.
4.5
Cleaning the filter
element (IVB 3-H)
Only after picking up harmless dust
using the waste bag.
If suction performance drops:
1. Set the suction power to
maximum.
2. Close the nozzles or suction
hose opening with the palm
of your hand.
3. Press the button to start filter
cleaning three times. The re-
sulting stream of air removes
attached dust from the slats
of the filter elements.
To ensure that suction performance
is always at its best, the filter ele-
ment is automatically cleaned dur-
ing operation. We recommend com-
plete cleaning if the filter element
becomes extremely dirty.
NOTE:
If the acoustic signal sounds again
after repeated cleaning, replace the
filter element (see section 7.2.4).
Only after picking up harmless dust
using the waste bag.
1. Switch off the vacuum clean-
er
2. Close the nozzles or suction
hose opening with the palm
of your hand.
NOTE:
If the acoustic signal sounds again
after repeated cleaning, replace the
filter element (see section 7.2.3).
1
2
x3
Push & Clean
Filter Cleaning System
0
I
auto
4.6
Cleaning the filter
element (IVB 5-H/
IVB 7-H)
3. Turn the switch to position „I“
and let the cleaner operate
for approx. 10 seconds with
the suction hose opening
closed.
