19
Troubleshooting
Fault
Possible cause
Solution
Unit doesn’t start
Fault in mains supply
Plug in another electric appliance and
check whether it works.
Supply cord or plug defective
The cord should be checked and replaced
if necessary by an electrical specialist.
Unit defective
The unit should be repaired at a Hilti
service centre.
Acoustic warning signal
Core bit or diamond core drilling Check for free flow and eliminate
(without warning lamp)
machine blocked
blockage.
Regulating valve on diamond core Open the regulating valve on the diamond
drilling machine set too low in
core drilling machine.
manual operation.
Water supply hose not connected Connect the water supply hose to the
to the diamond core drilling
diamond core drilling machine.
machine.
Water warning lamp lights;
Too little water or too much
Clean the container and refill it.
acoustic warning signal
slurry in the container
Inner container not completely
Fill the inner container completely with
filled with water
water.
Main filter blocked
Regenerate the main filter.
Regulating valve opened in manual Close the regulating valve on the diamond
operation when the diamond core core drilling machine.
drilling machine is switched off
Seals defective
Check the seals on the cover and in the
nipples for damage and have them
replaced at a Hilti service centre if
necessary.
Container not inserted correctly
Check the position of the container in the
in the unit
housing; close the container handle care-
fully.
Air release valve sticking
Check the air release valve to ensure free
movement; have it repaired at a Hilti ser-
vice centre if necessary.
Pressure pump defective
Have it repaired at a Hilti service centre.
Temperature warning lamp lights; Water temperature too high
Allow the container to cool or clean it and
acoustic warning signal
then refill it. Caution: Risk of burning or
scalding!
Suction performance inadequate Coarse filter in the water
Remove coarse particles.
(leakage at water collector on the collector of the diamond
diamond core drilling machine)
drilling machine blocked
Suction pump defective
Have it repaired at a Hilti service centre.
The seals of the water tank
Check if the surface and seals of the
don’t seal off completely
cover from the water tank are clean.
Printed: 07.07.2013 | Doc-Nr: PUB / 5139951 / 000 / 00
