Hilti DD 160 Original Operating Instructions page 40

7.2 Switching on and checking the ground fault
circuit interrupter (PRCD)
en
208188 B/2.2004
An isolating transformer must be used with machines not
equipped with a PRCD.
1. Plug the machine's
earthed/grounded 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.
34
supply cord into an
7.3 Drilling without use of the water collection
system and industrial vacuum cleaner
WARNING
Water must not be allowed to run over the motor and
cover.
WARNING
Water drainage is uncontrolled. Overhead drilling is not
permissible.
1. Slowly open the water flow regulator until the desired
volume of water is flowing.
2. Press the on/off switch on the machine (position "I").
The drilling performance indicator lights orange.
3. Release the carriage locking mechanism.
4. Turn the hand wheel until the diamond core bit is in
contact with the work surface.