•
Do not operate the power tool if signs of damage are found or if parts malfunction. Have damage repaired
immediately by Hilti Service.
•
After cleaning and maintenance, refit all guards or protective devices and check that they function
correctly.
6.1
Cleaning the dust shield
▶ Clean the dust shield on the chuck with a dry, clean cloth at regular intervals.
▶ Clean the sealing lip by wiping it carefully and then grease it again lightly with Hilti grease.
▶ It is essential that the dust shield is replaced if the sealing lip is damaged.
7
Transport and storage
•
Do not transport electric tools with accessory tools fitted.
•
Always unplug the supply cord before storing an electric tool or appliance.
•
Store tools and appliances in a dry place where they cannot be accessed by children or unauthorized
persons.
•
Check electric tools or appliances for damage after long periods of transport or storage.
8
Troubleshooting
If the trouble you are experiencing is not listed in this table or you are unable to remedy the problem by
yourself, please contact Hilti Service.
8.1
Troubleshooting
Trouble or fault
The power tool doesn't start.
No hammering action.
The power tool doesn't start
and the service indicator
lights red.
The tool does not achieve full
power.
The chisel cannot be released
from the chuck.
18
English
Printed: 15.05.2018 | Doc-Nr: PUB / 5070999 / 000 / 09
Possible cause
Interruption in the electric supply.
The supply cord or plug is defec-
tive.
The generator is in sleep mode.
Electrical fault.
The electronic restart interlock is
activated after an interruption in
the electric supply.
The tool is faulty or servicing is
due.
The carbon brushes are worn out.
The tool is faulty or servicing is
due.
The gauge (cross section) of the
extension cord conductors is inad-
equate.
The control switch is not fully
pressed.
The chuck is not pulled back fully.
Action to be taken
▶ Plug in another power tool or
appliance and check whether it
works.
▶ Have the supply cord or the plug
checked by a trained electrical
specialist and replaced if
necessary.
▶ Apply a load to the generator
by connecting a second power
consumer (e.g. worklight).
▶ Have the power tool and supply
cables checked by a trained
electrical specialist.
▶ Switch the power tool off and
then on again.
▶ Have the product repaired only
by Hilti Service.
▶ Have the power tool checked by
a trained electrical specialist and
the carbon brushes replaced if
necessary.
▶ Have the product repaired only
by Hilti Service.
▶ Use an extension cord with
an adequate conductor cross
section.
▶ Press the control switch as far
as it will go.
▶ Pull the chuck back as far as
it will go and remove the insert
tool.
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