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

CAUTION
When fitting the top section of the vacuum cleaner,
take care to avoid pinching your fingers or damaging
the supply cord.
7.5.1 Automatic filter element cleaning
NOTE
Do not attempt to clean the filter element by knocking it
against a hard object and do not use pointed instruments.
This will reduce the life of the filter element.
NOTE
Do not use compressed air to clean the filter element.
This may cause tears in the filter material.
NOTE
The condition of the filter will deteriorate with use. It
should be replaced at least every 6 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.
The appliance is equipped with an automatic filter clean-
ing system which removes most of the dust adhering
to the filter element. The filter 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 cleaning system
status indicator LED: LED lights = the filter cleaning sys-
tem is active. LED does not light = the filter cleaning
system has been deactivated. The filter cleaning sys-
tem 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 accord-
ance with the applicable regulations.
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.
Printed: 28.03.2019 | Doc-Nr: PUB / 5140202 / 000 / 04
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.
CAUTION
The material collected must be disposed of in accord-
ance with the applicable regulations.
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 instructions 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 removed from the
appliance before beginning maintenance.
CAUTION
Never use the appliance without a filter element.
7.7.1 Before picking up liquids
1. Remove the dust bag from the waste material con-
tainer.
2. Check that the level monitoring electrodes (two
metal discs on the underside of the vacuum cleaner
top section) are clean. If necessary, use a brush to
clean these parts.
7.7.2 When picking up liquids
If possible, use a separate filter element for wet applica-
tions.
NOTE
If possible, use a Hilti PTFE filter element.
If foaming occurs, switch the appliance off immediately
and empty the container.
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