Hilti TE 30 Mode D'emploi page 21

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6 Care and maintenance
WARNING
Danger of electric shock! Carrying out care and maintenance while the supply cord is connected to
the power outlet presents a risk of serious injuries including burns.
▶ Always unplug the supply cord before carrying out all care and maintenance tasks.
Care
• Carefully remove stubborn dirt from the tool.
• Clean the air vents carefully with a dry brush.
• 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.
7 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.
7.1 Troubleshooting
Trouble or fault
The power tool doesn't start.
The tool cuts out while run-
ning.
No hammering action.
The combihammer doesn't
achieve full power.
Printed: 29.05.2017 | Doc-Nr: PUB / 5070837 / 000 / 04
Possible cause
Interruption in the electric supply.
The carbon brushes are worn out.
Drilling for too long at low speed.
The tool is too cold.
The function selector switch is set
to "Rotary drilling only"
The gauge (cross section) of the
extension cord conductors is inad-
equate.
Action to be taken
▶ Plug in another electric tool or
appliance and check whether it
works.
▶ Have the power tool checked by
a trained electrical specialist and
the carbon brushes replaced if
necessary.
▶ Release the control switch and
then press it again.
▶ Bring the tip of the drill bit
into contact with the working
surface, switch the rotary
hammer on and allow it to
run. If necessary, repeat the
procedure until the hammering
mechanism begins to operate.
▶ Set the function selector switch
. to the "Hammer drilling" position
.
▶ Use an extension cord with
an adequate conductor cross
section.
English 15