Indicator Light Operation; Charge Indicators; Important Charging Notes - DeWalt DCS391-XE Instruction Manual

Charging Procedure (Fig. 1)
1. Plug the charger into an appropriate outlet before inserting the battery pack.
2. Insert the battery pack (C) into the charger, as shown in Figure 1, making sure
the pack is fully seated in charger. The red (charging) light will blink continuously,
indicating that the charging process has started.
3. The completion of charge will be indicated by the red light remaining ON
continuously. The pack is fully charged and may be used at this time or left in the
charger.
FIG. 1

Indicator Light Operation

PACK CHARGING
PACK CHARGED
HOT/COLD DELAY
x
PROBLEM PACK OR CHARGER
PROBLEM POWERLINE
C
7

Charge Indicators

This charger is designed to detect certain problems that can arise. Problems are indicated
by the red light flashing at a fast rate. If this occurs, re-insert the battery pack into the
charger. If the problem persists, try a different battery pack to determine if the charger
is working properly. If the new pack charges correctly, then the original pack is defective
and should be returned to a service center or other collection site for recycling. If the new
battery pack elicits the same trouble indication as the original, have the charger and the
battery pack tested at an authorized service center.
HOT/COLD DELAY
This charger has a hot/cold delay feature: when the charger detects a battery that is
hot, it automatically starts a 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 flashes long, then
short while in the hot/cold delay mode.
LEAVING THE BATTERY PACK IN THE CHARGER
The charger and battery pack can be left connected with the charge indicator showing
Pack Charged.
WEAK BATTERY PACKS: Weak batteries will continue to function but should not be
expected to perform as much work.
FAULTY BATTERY PACKS: This charger will not charge a faulty battery pack. The
charger will indicate faulty battery pack by refusing to light or by displaying problem pack
or charger.
NOTE: This could also mean a problem with a charger.

Important Charging Notes

1. Longest life and best performance can be obtained if the battery pack is charged
when the air temperature is between 18° – 24°C (65°F and 75°F). DO NOT charge
the battery pack in an air temperature below +4°C (+40°F), or above +40°C
(+105°F). This is important and will prevent serious damage to the battery pack.
2. The charger and battery pack may become warm to the touch while charging.
This is a normal condition, and does not indicate a problem. 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 trailer.