9 Troubleshooting
Fault
The power tool doesn't start.
en
The tool cuts out while running.
The power tool doesn't start
and the indicator lamp blinks
yellow.
No hammering action.
The power tool doesn't achieve
full power.
The drill bit doesn't rotate.
The drill bit can't be released.
The drill bit makes no progress.
10 Disposal
Most of the materials from which Hilti power 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 your old power tools or appliances for recycling. Please ask your Hilti customer service department or
Hilti representative for further information.
For EC countries only
Disposal of electric tools together with household waste is not permissible.
In observance of the European Directive on waste electrical and electronic equipment and its imple-
mentation in accordance with national law, electrical appliances that have reached the end of their life
must be collected separately and returned to an environmentally compatible recycling facility.
26
Possible cause
Interruption in the electric supply.
The supply cord or plug is defective.
The carbon brushes are worn.
The control switch is defective.
Drilling for too long at low speed.
The power tool has not been un-
locked (power tools with optional theft
protection system).
The power tool is too cold.
The function selector switch is set to
"Drilling without hammering".
The extension cord's conductor cross
section is inadequate.
The control switch is not pressed
fully.
The function selector switch is not
engaged or is in the "Chiseling" or
"Chisel adjustment" position.
The chuck is not pulled back fully.
The forward/reverse switch is set to
reverse rotation.
Remedy
Plug in another electric appliance and
check whether it works.
Have it checked by a trained electrical
specialist and replaced if necessary.
Have it checked by a trained electrical
specialist and replaced if necessary.
Have it checked by a trained electrical
specialist and replaced if necessary.
Release the switch and then press it
again.
Use the TPS key to unlock the power
tool.
Allow the power tool to warm up to
the minimum operating temperature.
See section: 7.2.3 Hammer drilling 9
Set the function selector switch to
"Hammer drilling".
Use an extension cord with an ad-
equate conductor cross section.
See section: 6.2 Use of extension
cords and generators or transformers
Press the control switch as far as it
will go.
Move the function selector switch to
the "Hammer drilling" position when
the motor has stopped.
Pull the chuck back as far as it will go
and remove the insert tool.
Set the forward/reverse switch to for-
ward rotation.