DeWalt DW937 Manual De Instrucciones página 9

CAUTION: 120 volts present at charging terminals. Do not probe
with conductive objects. Danger of electric shock or electrocution.
Keep battery door closed and latched at all times.
Indicator Light Operation
PACK CHARGING...................
FULLY CHARGED...................
HOT/COLD PACK DELAY........
REPLACE PACK......................
PROBLEM POWER LINE........
Charge Indicators
Some chargers are designed to detect certain problems that can arise
with battery packs. Problems are indicated by the red light flashing at
a fast rate. If this occurs, re-insert battery pack into the charger. If the
problem persists, try a different battery pack to determine if the charg-
er is OK. If the new pack charges correctly, then the original pack is
defective and should be returned to a service center or other collec-
tion site for recycling. If the new battery pack elicits the same trouble
indication as the original, have the charger tested at an authorized ser-
vice center.
FIG. 1 HOT/COLD PACK DELAY
Some chargers have a Hot/Cold Pack Delay feature: when the charg-
er detects a battery that is hot, it automatically starts a Hot Pack Delay,
suspending charging until the battery has cooled. After the battery has
cooled, the charger automatically switches to the Pack Charging
mode. This feature ensures maximum battery life. The red light flash-
es long, then short while in the Hot Pack Delay mode.
PROBLEM POWER LINE
Some chargers have a Problem Power Line indicator. When the charg-
er is used with some portable power sources such as generators or
sources that convert DC to AC, the charger may temporarily suspend
operation, flashing the red light with two fast blinks followed by a
pause. This indicates the power source is out of limits.
LEAVING THE BATTERY PACK IN THE CHARGER
The charger and battery pack can be left connected with the red light
glowing indefinitely. The charger will keep the battery pack fresh and
fully charged.
NOTE: A battery pack will slowly lose its charge when kept out of the
charger. If the battery pack has not been kept on maintenance charge,
it may need to be recharged before use. A battery pack may also
slowly lose its charge if left in a charger that is not plugged into an
appropriate AC source.
WEAK BATTERY PACKS: Chargers can also detect a weak battery.
Such batteries are still usable but should not be expected to perform
as much work. In such cases, about 10 seconds after battery inser-
tion, the charger will beep rapidly 8 times to indicate a weak battery
condition. The charger will then go on to charge the battery to the high-
est 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-
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