are damaged or when the controls do not function
faultlessly. If necessary, the power tool should be
repaired by Hilti Service.
8.4 Checking the power tool after care and
maintenance
After carrying out care and maintenance work on
the power tool, check that all protective and safety
devices are fitted and that they function faultlessly.
9. Troubleshooting
Fault
Possible cause
Remedy
The power tool
doesn’t start.
Interruption in the electric supply.
Plug in another electric appliance and
check whether it works.
The supply cord or plug is defective.
Have the supply cord and plug checked
by an electrical specialist and replaced if
necessary.
Other electrical fault.
Have it checked by a trained electrical
specialist.
The carbon brushes are worn.
Have the supply cord and plug checked
by an electrical specialist and replaced if
necessary.
No hammering
action.
The power tool is too cold.
Allow the power tool to warm up to the
minimum operating temperature.
See section: 7.2.1 Chiseling
6
The power tool
doesn’t achieve full
power.
The extension cord’s conductor cross
section is inadequate.
Use an extension cord with an adequate
conductor cross section. (Please refer to
“Before use”.)
The control switch is not pressed fully.
Press the control switch as far as it will
go.
The chisel can’t be
released from the
chuck.
The chuck is not pulled back fully.
Pull the chuck back as far as it will go and
remove the insert tool.
10. Disposal
Most of the materials from which Hilti tools or machines 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 your old tools for recycling. Please ask your Hilti customer service department or Hilti
representative for further information.
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Printed: 07.07.2013 | Doc-Nr: PUB / 5070791 / 000 / 00
