Hilti PR 20, Operating Instructions Manual, Page: 10 / 52

7
6. Getting started
6. Getting started
-NOTE-
The tool may be powered only by the PRA
801 battery pack or by batteries
manufactured according to the
IEC standard.
PR 801 battery pack
– The performance of the battery pack
drops at low temperatures.
– Store the battery pack at room
temperature.
– Never store the battery pack where
it is exposed to direct sunlight, on
a radiator or heater, or behind glass
(windows, motor vehicle wind-
screens, etc).
Batteries
– Do not use damaged batteries.
– Do not mix old and new batteries.
Do not mix batteries of different
types or batteries from various
manufacturers.
6.1 Switching on the tool
Press the ON / OFF key.
-NOTE-
After switching on, the tool begins to level
itself automatically.
6.2 LED indicators
Auto leveling LED
The LED blinks rapidly.
The tool is leveling itself
automatically.
The LED lights constantly.
The tool has leveled itself / is
operating normally.
Shock warning LED
All LED’s blink.
The tool has been bumped or
brought out of level temporarily.
The shock warning LED lights red.
The shock warning LED lights red
after deactivation of the shock
warning.
Battery voltage LED
The LED lights.
The batteries are almost exhausted.
Inclination LED
The X and Y LEDs do not light.
Operation in the horizontal plane.
The X LED does not light and
The Y LED lights red
Manual operation: Y-direction can
be aligned manually by way of the
servo keys.
X–direction is still under automatic
control.
The X LED lights red and
The Y LED does not light
Manual operation: X direction can
be aligned manually by way of the
servo keys.
Y axis is still under automatic
control.
The X LED lights red and
The Y LED lights red
Manual operation: X and Y direc-
tions can be aligned manually by
way of the servo keys.
The shock warning system is
deactivated.
6.3 Inserting new batteries
1.Open the battery compartment by
turning the locking button.
2.Insert the batteries in the battery
compartment. Take care to ensure
correct polarity.
3.Close the battery compartment by
turning the locking button.
Printed: 07.07.2013 | Doc-Nr: PUB / 5070169 / 000 / 00