Hilti DD VP-U Manual page 16

4. Empty the container.
5. Check the ball float.
▶ Carefully ease the ball float free if it is stuck.
▶ The ball is loose at the bottom of the cage and the intake aperture is clear.
6. Clean the edge of the water separator.
7. Position the water separator on the bayonet connector of the container and turn it in the CLOSE direction.
8 Troubleshooting
Trouble or fault
Vacuum pump is running
but not enough vacuum is
achieved at the vacuum plate
(pressure gage of the vacuum
base plate in red zone).
Vacuum pump is running but
not enough vacuum is cre-
ated (pressure gage of the
vacuum pump in red zone).
Vacuum pump does not start.
Vacuum pump switches itself
off.
The water separator container
cannot be removed.
9 Disposal
Most of the materials from which Hilti tools and appliances are manufactured can be recycled. The
materials must be correctly separated before they can be recycled. In many countries, your old tools,
machines or appliances can be returned to Hilti for recycling. Ask Hilti Service or your Hilti representative
for further information.
▶ Do not dispose of power tools, electronic equipment or batteries as household waste!
10 Manufacturer's warranty
▶ Please contact your local Hilti representative if you have questions about the warranty conditions.
12 English
Possible cause
The filter is clogged.
Dirt in the hoses, fittings, pump
or vacuum baseplate seals (water
separator, connectors, etc.).
Operation at high altitude.
Water separator is full.
Ball float has become stuck.
Water separator is leaking, dam-
aged or not installed.
Hose is damaged or squashed.
Vacuum pump is faulty.
Power failure.
Supply cord not connected.
Vacuum pump is faulty.
Vacuum pump overheated.
System is still under vacuum.
Action to be taken
▶ Contact Hilti Service.
▶ Clean out the hoses, fittings
and seals or replace them if
necessary.
▶ Use an anchor base plate to
secure the drilling system.
▶ Empty the water separator.
→ page 11
▶ Check the ball float. → page 11
▶ Fit the water separator. Replace
it if damaged.
▶ Contact Hilti Service.
▶ Contact Hilti Service.
▶ Check the fuses and cables.
Check the position of the switch.
▶ Check that the electric supply
voltage complies with the details
given on the rating plate.
▶ Connect the supply cord.
▶ Contact Hilti Service.
▶ Let the product cool down. The
vacuum pump starts up again
automatically after it has cooled
down sufficiently.
▶ Clean the air vents.
▶ Check the operating voltage.
▶ Vent the vacuum (e.g. by means
of the vacuum release valve of
the vacuum base plate).
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