Care And Maintenance; Troubleshooting - Hilti DD AF-CA Manual De Instrucciones

8 Care and maintenance

CAUTION
Unplug the core drilling machine's supply cord from
the power outlet.
8.1 Care of the appliance
CAUTION
Keep the appliance, especially its grip surfaces, clean
and free from oil and grease. Do not use cleaning
agents which contain silicone.
Clean the outside of the appliance at regular intervals with
a slightly damp cleaning cloth. Do not use spray systems,
steam pressure cleaning systems or high-pressure water
jet systems when cleaning. This may negatively affect the
electrical safety of the appliance.
8.2 Care of core bits and metal parts
Remove any dirt adhering to the surface of core bits, the
chuck and drive spindle and protect their surfaces from

9 Troubleshooting

Fault
The cable cannot be connected
to the core drilling machine.
The drilling feed unit can't be
fitted.
The LEDs on the drilling feed
unit don't light when the but-
ton on the PRCD for the core
drilling machine is pressed.
corrosion by rubbing them with an oily cloth from time to
time.
8.3 Maintenance
WARNING
Repairs to the electrical section of the appliance may
be carried out only by trained electrical specialists.
Check all external parts of the drilling feed unit for damage
at regular intervals and check that all controls operate
faultlessly. Do not operate the drilling feed unit if parts are
damaged or when the controls do not function faultlessly.
Repairs should be carried out by Hilti Service.
8.4 Checking the appliance after care and
After carrying out care and maintenance, check that all
protective and safety devices are fitted and that they
function faultlessly.
Possible cause
The plug connector is dirty.
The plug connector or cable is defect-
ive.
The bushing for the fastening screw is
clogged or obstructed.
The thread on the fastening screw or
in the hole is defective.
The cable is damaged.
The connector is faulty.
The plug connector is dirty.
maintenance
Remedy
Unplug the core drilling machine from
the power outlet.
Clean the plug connector.
Without using force, try again to plug
in the connector.
Contact Hilti Service.
Clean the threaded bushing
Contact Hilti Service.
Contact Hilti Service.
Unplug the core drilling machine from
the power outlet.
Check the connector between the
drilling feed unit and the core drilling
machine.
Return the cable or connector to Hilti
Service if faulty.
Unplug the core drilling machine from
the power outlet.
Check the plug connection between
the drilling feed unit and the core
drilling machine.
Return the cable to Hilti Service if
faulty.
en
21