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•
Use only a slightly damp cloth to clean the casing. Do not use cleaning agents containing silicone as
they can attack the plastic parts.
Maintenance
WARNING
Danger of electric shock! Improper repairs to electrical components may lead to serious injuries including
burns.
▶ Repairs to the electrical section of the tool or appliance may be carried out only by trained electrical
specialists.
•
At regular intervals, check all visible parts and the controls for signs of damage and make sure that they
all function correctly.
•
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.
8.1
Checks after care and maintenance work
▶ After carrying out care and maintenance, check that all protective and safety devices are fitted and that
they function faultlessly.
9
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.
10
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.
10.1
Troubleshooting
Trouble or fault
Product does not start.
Product does not work.
Product does not develop full
power.
Elevated temperatures at the
gear housing.
2143513
*2143513*
Possible cause
Interruption in the electric supply.
The supply cord or plug is defec-
tive.
The carbon brushes are worn.
Product is overloaded.
The extension cord conductor
cross section (gauge) is inade-
quate.
Short braking interval.
Action to be taken
▶ Plug in another power tool or
appliance and check whether it
works.
▶ Have the supply cord and plug
checked by a trained electrical
specialist and replaced if
necessary.
▶ Have the power tool checked by
a trained electrical specialist and
the carbon brushes replaced if
necessary.
▶ Release the on/off switch and
then press it again. Then allow
the product to run under no load
for approx. 30 seconds.
▶ Use an extension cord with
an adequate conductor cross
section.
▶ Allow the device to run under no
load until it has cooled down.
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