9 Troubleshooting
Fault
Possible cause
Remedy
PRE 38 battery low
The batteries in the grade laser are
exhausted.
Remove the exhausted batteries and
insert new ones.
PRA 380 battery low
The batteries in the remote control
unit are exhausted.
Remove the exhausted batteries and
insert new ones.
The tool has been bumped.
The tool has been subjected to vibra-
tion or an impact.
Activate the automatic self-levelling
function by switching the tool off and
then on again.
The tool has been set up off-
level.
The tool has been set up off level, i.e.
outside its self-leveling range.
Reposition the tool so that it is re-
aligned in accordance with the sym-
bol shown.
Calibration Over ERR
The result of the tool check is not
within specification.
Restart the tool by switching it off and
then on again.
E-05
The rotary head does not rotate.
Switch the tool off and then on again.
E-51
Internal memory error in the remote
control unit.
Switch the remote control unit off and
then on again.
E-60s
Encoder system error
Switch the tool off and then on again.
E-80s
Leveling is not yet complete.
Switch the tool off and then on again.
E-99
Internal memory error
Switch the tool off and then on again.
LCD display light blinks
The display remains blank
Switch the tool off and then on again.
10 Disposal
WARNING
Improper disposal of the equipment may have serious consequences:
The burning of plastic components generates toxic fumes which may present a health hazard.
Batteries may explode if damaged or exposed to very high temperatures, causing poisoning, burns, acid burns or
environmental pollution.
Careless disposal may permit unauthorized and improper use of the equipment. This may result in serious personal
injury, injury to third parties and pollution of the environment.
Most of the materials from which Hilti tools or appliances are manufactured can be recycled. The materials must be
correctly separated before they can be recycled. In many countries, Hilti has already made arrangements for taking
back old tools or appliances for recycling. Ask Hilti Customer Service or your Hilti representative for further information.
For EC countries only
Do not dispose of electronic measuring tools or appliances together with household waste.
In observance of the European Directive on waste electrical and electronic equipment and its imple-
mentation in accordance with national law, electric tools and batteries that have reached the end of their
life must be collected separately and returned to an environmentally compatible recycling facility.
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Printed: 08.07.2013 | Doc-Nr: PUB / 5070345 / 000 / 01