Operating Instruction C 4/36 -90/-350/-DC (01)

English 11
6 Troubleshooting
Malfunction Possible cause Action to be taken
LEDs on the battery
don’t light, battery is
in the charger.
The battery may be de-
fective.
▶ Remove the battery
from the charger. If
no LED lights on the
battery after activation
of the state of charge
indicator, the battery
is defective. Have the
battery checked by
Hilti Service.
LEDs on the charger
blink.
The battery is too hot
or too cold: the battery
doesn’t charge.
▶ The charger switches
automatically to
charging mode as
soon as the battery
reaches the required
temperature.
LEDs on the charger
don’t light.
Charger malfunction. ▶ Unplug the appliance
and then plug it back
in. If the LED still
doesn’t light, please
bring the charger to
Hilti Service.
7 Care and maintenance
WARNING
Electric shock hazard! Attempting care and maintenance with the supply
cord connected to a power outlet can lead to severe injury and burns.
▶ Always unplug the supply cord before carrying out care and maintenance
tasks.
Care
• Carefully remove any dirt that may be adhering to parts.
• 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 these may 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.
Printed: 03.01.2019 | Doc-Nr: PUB / 5129966 / 000 / 11