DeWalt DW934 Manual De Instrucciones página 10

capacity. Battery packs should be tuned up after every 10th
charge/discharge cycle or whenever the pack no longer delivers
the same amount of work. To use the automatic tune-up mode,
simply place the battery pack in the charger and leave it for at
least eight hours. The charger will cycle through the following
modes.
1. The red light will blink continuously indicating that the 1-hour
charge cycle has started.
2. When the 1-hour charge cycle is complete, the light will stay
on continuously and will no longer blink. This indicates that the
pack is fully charged and can be used at this time.
3. Whenever the pack is left in the charger after the initial 1-hour
charge, the charger will begin the Automatic Tune-Up™ Mode.
This mode continues up to 8 hours or until the individual cells
in the battery pack are equalized. The battery pack is ready for
use and can be removed at any time during the Tune-Up™
Mode.
4. Once the Automatic Tune-Up™ Mode is complete the charger
will transition to a maintenance charge; no indicator light
shows the completion of the Automatic Tune-Up™ Mode.
USING THE MANUAL TUNE-UP™ MODE
The manual Tune-up™ mode equalizes or balances the individ-
ual cells in the battery pack at its peak capacity. This mode takes
up to 8 hours to complete. Battery packs should be tuned up after
10 charge/discharge cycles or whenever the pack no longer deliv-
ers the same amount of work.
1. To tune up your battery pack, place the battery in the charger
as usual. The red light will blink continuously indicating that the
charge cycle has started.
2. Press the Tune-Up™ Mode button any time after the charge
cycle has started. The red light will stop blinking momentarily,
blink quickly 3 times, and then resume blinking continuously.
The charger is now tuning up the cells in your battery.
3. When the Tune-Up™ mode cycle is complete, the light will
stay on continuously. The pack is fully charged and may be
used at this time or left in the charger.
4. If you select Tune-Up™ Mode and then change your mind,
remove the battery from the charger. After 5 seconds, insert the
battery into the charger. The normal charge cycle will begin.
Charge Indicators
These 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 the battery pack. If
problem persists, try a different battery pack to determine if the
charger is OK. If the new pack charges correctly, then the original
pack is defective and should be returned to a service center for
recycling. If the new battery pack gives the same trouble indication
as the original, have charger tested at an authorized service center.
HOT/COLD PACK DELAY
When the charger detects a battery that is excessively hot or exces-
sively cold, it automatically starts a Hot/Cold Pack Delay, suspend-
ing charging until the battery temperature has normalized. After this
happens, the charger automatically switches to the Pack Charging
mode. This feature ensures maximum battery life. The red light
flashes long, then short while in the Hot/Cold Pack Delay mode.
PROBLEM POWER LINE
Some chargers have a problem power line indicator. When the
charger is used with some portable power sources such as
generators or sources that convert DC to AC, the chargers 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.
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