Care And Maintenance; Troubleshooting - Hilti DD VP-U Operating Instructions Manual

8. Care and maintenance

CAUTION
en
Disconnect the supply cord plug from the power
outlet before maintenance.
WARNING
Improper cleaning may adversely affect electrical
safety.
8.1 Care of the appliance
CAUTION
Disconnect the supply cord plug from the power
outlet before maintenance.
8.2 Emptying the water separator 2
1. Connect the hose to the vacuum base plate in
order to release any remaining vacuum pressure.
2. Rotate the water separator container to the "open"
position and pull it down and away from the pump
(bayonet connection).
3. Empty the container.

9. Troubleshooting

Fault
The pump is running and
is connected to the vacuum
baseplate but no vacuum is
created (pressure indicator in
the red area).
The pump runs but creates no
vacuum (pressure indicator in
the red area).
14
4. Check the ball float.
The ball must be free to move in its cage.
Press the ball down if it is stuck up against the
seal.
5. Clean the top edge of the water separator con-
tainer before refitting it.
6. Bring the bayonet connector on the water con-
tainer into engagement and then rotate the con-
tainer toward "close".
7. Check that the water separator container is seated
securely.
8.3 Cleaning the appliance
CAUTION
Do not use solvents as these may damage plastic
components.
WARNING
Do not clean with running water or use pressure
jet/spray systems. This may adversely affect electrical
safety.
1. Use a damp cloth and a little household cleaner
to clean the outside of the appliance.
2. Always keep the grip surfaces of the appliance
free from oil and grease.
3. Clean the ventilation slots regularly with a soft,
dry brush.
Possible cause
The filter is clogged.
Dirt in the hoses, fittings, pump
or vacuum baseplate seals (water
separator, connectors, etc.).
Operation at high altitude.
The water separator is full.
The ball float is stuck beneath the
filter unit.
The water separator is leaking,
damaged or not fitted.
The hose is damaged or squashed.
The pump is defective.
Remedy
Return the appliance for repair.
Clean out the hoses, fittings and
seals or replace them if necessary.
Use a different fastening method.
Empty the water separator.
Remove the water separator and
pull the ball down.
Fit the water separator. Replace it if
damaged.
Return the appliance for repair.
Return the appliance for repair.