Hilti TE 70-AVR Original Operating Instructions page 21

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.
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
Combihammer does not start. Interruption in the electric supply.
No hammering action.
Combihammer does not
achieve full power.
*2063038*
Possible cause
The generator is in sleep mode.
The electronic restart interlock is
activated after an interruption in
the electric supply.
The carbon brushes are worn.
The power tool is too cold.
The extension cord is too long or
the conductor cross-section is
inadequate.
2063038
Action to be taken
▶ Plug in another electric tool or
appliance and check whether it
works.
▶ Apply a load to the generator
by connecting a second power
consumer (e.g. worklight).
Switch the tool off and then on
again.
▶ Switch the power tool off and
then on again.
▶ Have checked, and if necessary
replaced, by a trained electrical
specialist.
▶ Bring the tip of the accessory
tool into contact with the
working surface, switch the
power tool on and allow it to
run. If necessary, repeat the
procedure until the hammering
mechanism begins to operate.
▶ Use an extension cord of an
approved length and / or of
adequate conductor cross-
section.
English 17