Picking Up Liquids - Hilti VC 20-U-Y Manual De Instrucciones

months and more frequently if the appliance is
subject to heavy use.
NOTE
The filter element cleaning system functions
only when a suction hose is connected.
en The appliance is equipped with an automatic
filter cleaning system which removes most of
the dust adhering to the filter element. The fil-
ter cleaning system can be switched OFF by
pressing the button (16) and switched back
ON by pressing the button again. The system's
status is shown by the automatic filter clean-
ing system status indicator LED: LED lights =
the filter cleaning system is active. LED does
not light = the filter cleaning system has been
deactivated. The filter cleaning system is set
to "ON" (active) automatically each time the
appliance is switched on.
The filter element is cleaned automatically by a
blast of air (a pulsating noise is heard).
7.5.2 Changing the paper dust bag 2
DANGER
Check that the bag has not been pierced
through by objects which may cause injury.
CAUTION
The material collected must be disposed of
in accordance with the applicable regula-
tions.
1. Disconnect the supply cord plug from the
power outlet.
2. Open the two catches.
3. Lift the vacuum cleaner top section away
from the waste material container.
4. Carefully release the mouth of the paper
dust bag from the adapter.
5. Close the slider on the dust bag sleeve.
6. Clean the waste material container with a
cloth.
7. Fit a new dust bag in the waste material
container.
8. Fit the vacuum cleaner top section onto
the waste material container.
9. Close the two catches.
7.5.3 Changing the plastic dust bag 4
DANGER
Check that the bag has not been pierced
through by objects which may cause injury.
40
CAUTION
The material collected must be disposed of
in accordance with the applicable regula-
tions.
1. Disconnect the supply cord plug from the
power outlet.
2. Open the two catches.
3. Lift the vacuum cleaner top section away
from the waste material container.
4. Use a cable tie to close the plastic dust
bag below the punched holes.
5. Remove the plastic dust bag.
6. Clean the waste material container with a
cloth.
7. Fit a new plastic dust bag (see instruc-
tions printed on it) in the waste material
container.
8. Fit the vacuum cleaner top section onto
the waste material container.
9. Close the two catches.
7.6 Audible signal (VC 20‑UM-
Y/ VC 40‑UM-Y)
For safety reasons, an audible warning signal
is emitted when the air speed in the hose
drops below 20 m/s. Please refer to the
"Troubleshooting" section for possible causes
of this problem.

7.7 Picking up liquids

DANGER
Do not use the appliance to pick up hazardous
dusts.
DANGER
The supply cord plug must be unplugged
from the power outlet and the batteries re-
moved from the appliance before beginning
maintenance.
CAUTION
Never use the appliance without a filter ele-
ment.
7.7.1 Before picking up liquids
1. Remove the dust bag from the waste ma-
terial container.