18 English 2190680
*2190680*
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.
• Check all visible parts and controls for signs of damage at regular intervals and make sure that they all
function correctly.
• Do not operate the product if signs of damage are found or if parts malfunction. Have it repaired
immediately by Hilti Service.
• After cleaning and maintenance, fit all guards or protective devices and check that they function correctly.
To help ensure safe and reliable operation, use only genuine Hilti spare parts and consumables. Spare
parts, consumables and accessories approved by Hilti for use with the product can be found at your
local Hilti Store or online at: www.hilti.group.
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 Possible cause Action to be taken
The power tool doesn’t start. Electronics initialization in progress
(takes up to 4 seconds after plug-
ging in). The electronic restart in-
terlock is activated after an inter-
ruption in the electric supply.
▶ Switch the power tool off and
then on again.
Interruption in the electric supply. ▶ Plug in another electric tool or
appliance and check whether it
works.
The generator is in sleep mode. ▶ Apply a load to the generator
by connecting a second power
consumer (e.g. worklight).
Switch the tool off and then on
again.
The detachable supply cord is not
fitted correctly.
▶ Fit the detachable supply cord
to the power tool correctly.
The service indicator lights
red.
The tool is faulty or servicing is
due.
▶ Have the product repaired only
by Hilti Service.
The service indicator blinks
red.
The voltage provided by the elec-
tric supply is too high.
▶ Use a different power outlet.
Check the electric supply.
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