DeWalt DC390 Guide D'utilisation page 10

mode. This feature e nsures maximum b attery life. T he redlight f lash-
eslong, then short while intheHotPack Delay m ode.
PROBLEM POWER L INE
Some c hargers have aProblem P ower Line indicator. When t hecharg-
eris used with some portable power sources such asgenerators or
sources that c onvert DCtoAC, t hecharger may temporarily suspend
operation, flashing theredlightwithtwofastblinks followed bya
pause. This indicates the power source i soutoflimits.
LEAVING THE BATTERY PACK INTHE CHARGER
The charger and battery p ack canbeleftconnected with theredlight
glowing i ndefinitely. The charger will k eep thebattery p ack fresh and
fully charged.
NOTE: Abattery pack will s lowly l ose itscharge w hen kept o utofthe
charger. Ifthebattery pack has not b een kept onmaintenance charge,
it mayneed toberecharged before use. A battery p ackmay also
slowly l oseitscharge i f leftina charger thatis notplugged i ntoan
appropriate ACsource.
WEAK BATTERY PACKS: Chargers canalso detect aweak battery.
Such batteries arestill u sable b utshould n otbeexpected toperform
asmuch work. I nsuch cases, about 1 0seconds after b attery i nser-
tion, t hecharger will b eep rapidly 8 times toindicate a weak b attery
condition. Thecharger will t hengoontocharge t hebattery t othe
highest capacity possible.
Important Charging Notes
1. Longest life and best performance can be obtained if the battery
pack is charged when the air temperature is between 65°F and
75°F (18°- 24°C). DO NOT charge the battery pack in an air tem-
perature below +40°F (+4.5°C), or above +105°F (+40.5°C). This
is important and will prevent serious damage to the battery pack.
2. The charger and battery pack may become warm to touch while
charging. This is a normal condition, and does not indicate a
problem.
3. If the battery pack does not charge properly:
a. Check current at receptacle by plugging in a lamp or other
appliance
b. Check to see if receptacle is connected to a light switch which
turns power off when you turn out the lights.
c. Move charger and battery pack to a location where the
surrounding air temperature is approximately 65°F - 75°F
(18° - 24°C).
d. If charging problems persist, take the tool, battery pack and
charger to your local service center.
4. The battery pack should be recharged when it fails to produce suf-
ficient power on jobs which were easily done previously. DO NOT
CONTINUE to use under these conditions. Follow the charging
procedure. You may also charge a partially used pack whenever
you desire with no adverse affect on the battery pack.
5. Under certain conditions, with the charger plugged into the power
supply, the exposed charging contacts inside the charger can be
shorted by foreign material. Foreign materials of a conductive
nature such as, but not limited to, steel wool, aluminum foil, or any
buildup of metallic particles should be kept away from charger
cavities. Always unplug the charger from the power supply when
there is no battery pack in the cavity. Unplug charger before
attempting to clean.
6. Do not freeze or immerse charger in water or any other liquid.
A WARNING: Don't allow any liquid to get inside charge_ Electric
shock may result. To facilitate the cooling of the battery pack after use,
avoid placing the charger or battery pack in a warm environment such
as in a metal shed, or an uninsulated traile_
A CAUTION: Never attempt to open the battery pack for any reason.
If the plastic housing of the battery pack breaks or cracks, retum to a
service center for recycling.
Installing and Removing the
Battery Pack
NOTE: Make sure your battery pack is fully charged.