Hilti DD VP-U, Original Operating Instructions, Page: 10 / 32

6 English 416186
*416186*
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 Possible cause Action to be taken
Vacuum pump is running
but not enough vacuum is
achieved at the vacuum plate
(pressure gage of the vacuum
base plate in red zone).
The filter is clogged.
▶
Contact Hilti Service.
Dirt in the hoses, fittings, pump
or vacuum baseplate seals (water
separator, connectors, etc.).
▶
Clean out the hoses, fittings
and seals or replace them if
necessary.
Operation at high altitude.
▶
Use an anchor base plate to
secure the drilling system.
Vacuum pump is running but
not enough vacuum is cre-
ated (pressure gage of the
vacuum pump in red zone).
Water separator is full.
▶
Empty the water separator.
→ page 5
Ball float has become stuck.
▶
Check the ball float. → page 5
Water separator is leaking, dam-
aged or not installed.
▶
Fit the water separator. Replace
it if damaged.
Hose is damaged or squashed.
▶
Contact Hilti Service.
Vacuum pump is faulty.
▶
Contact Hilti Service.
Vacuum pump does not start. Power failure.
▶
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.
Supply cord not connected.
▶
Connect the supply cord.
Vacuum pump is faulty.
▶
Contact Hilti Service.
Vacuum pump switches itself
off.
Vacuum pump overheated.
▶
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.
The water separator container
cannot be removed.
System is still under vacuum.
▶
Vent the vacuum (e.g. by means
of the vacuum release valve of
the vacuum base plate).
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.
11 Further information
For more information on operation, technology, environment and recycling, follow this link: www.hilti.group