Hilti DD 120 Mode D'emploi page 17

7.2 Switching on and checking the ground fault
circuit interrupter (PRCD)
208188 B/2.2004
(Note: An isolating transformer is used with the GB ver-
sion.)
1. Plug the machine's supply cord into an earthed
power outlet.
2. Press the "I" or "Reset" button on the ground fault
circuit interrupter (PRCD).
The drilling performance indicator lights orange.
3. Press the "0" or "Test" button on the ground fault
circuit interrupter (PRCD).
The indicator must go out.
4. WARNING If the indicator continues to light, fur-
ther operation of the machine is not permiss-
ible.Have the machine repaired by trained personnel
using genuine Hilti spare parts.
Press the "I" or "Reset" button on the ground fault
circuit interrupter (PRCD).
The indicator must light.
All manuals and user guides at all-guides.com
7.3 Drilling without use of the water collection
WARNING
Water must not be allowed to run over the motor and
cover.
WARNING
Water drainage is uncontrolled. Overhead drilling is not
permissible.
1.
2.
3.
4.
system and industrial vacuum cleaner
Slowly open the water flow regulator until the desired
volume of water is flowing.
Press the on/off switch on the machine (position "I").
The drilling performance indicator lights orange.
Release the carriage brake.
Turn the handwheel until the diamond core bit is in
contact with the base material.
en
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