Product Support Bulletin S/N B28A

Symptom
Possible Cause(s) Solution(s)
Battery Pack
fuel gauge
LEDs fail to
progress from
1 to 2 to 3 to 4
LED lit
first LED only,
stays blinking
– no
progression
Charger needs to be reset
Faulty Battery Pack
Progressive Charge Indication – indicates the approximate remaining charge
time or if there is enough charge level on the pack to complete the job at hand.
3 Amp Charger – charges battery pack in 30 minutes or less.
Fuel Gage LED lights will progress from 1 to 2 to 3 to 4 LED lit as Battery Pack
is charged – if no progression is seen the Charger or Battery Pack is faulty; the
internal temperature of the battery became too high, was subjected to water or
is defective.
no progression - this can also take place occasionally, if power is
interrupted and reapplied. Unplug Charger and remove Battery Pack for
one minute (60 seconds). Plug Charger back in and reinstall Battery
Pack on Charger
Battery Pack Protection Battery Pack Protection - to protect itself from damage and extend its life, the
battery pack’s intelligent circuit monitors current draw and temperature. In
extremely high torque, binding, stalling, and short circuit situations, the battery
pack will turn OFF the tool if the current draw becomes too high. In these
situations, the tool will "buzz" for about 5 seconds before it turns OFF. To
reset, pull and release the trigger. If this happens repeatedly, the battery pack
will shut down and need to be placed on the charger to reset. Under extreme
circumstances, the internal temperature of the battery could become too high;
the battery pack will then shut off. Remove the battery pack from the tool and
place it on the charger to reset it.
Battery Pack
connected to
Charger.
Alternately
flashing
red/green
Charger
lights.
Bad connection between
Battery Pack and Charger
Faulty Battery Pack
Battery Pack temperature
dropped below 14ºF
(-10ºC)
during charge
Pack temperature higher than
149ºF
(65ºC) at start of
charge
Water inside Battery Pack or
Charger as a result of
condensation from bringing
cold product into a warm
environment
Clean Battery Pack terminals. NOTE: Before checking battery pack terminals
inside connector block or fuses F1 or F2 unplug the Charger from power
source and let it sit for 3-4 minutes before disassembling – this allows circuit
board capacitor to self discharge.
Pack may not be accepting charge or Battery Pack electronics FET may be
faulty. Attempt to charge Battery Pack on known-good Charger.
Move Charger and Battery Pack to warmer environment. Allow to warm up,
and then re-start charge.
Allow Battery Pack to cool – 10 to 30 minutes - to appropriate temperature
range [<149ºF
(65ºC)] before attempting to charge.
Allow Battery Pack or Charger to dry out.
Battery Pack
shows four
lights, and
then – battery
pack is
‘dead’– fuel
gauge drops
to NO lights
after one or
two holes /
screw
insertions, etc
DEFECTIVE Battery Pack Battery Pack fuel gauge drops to NO lights after one or two holes / screw
insertions – no LEDs lit or blinking.
This bulletin is for informational purposes. PLEASE NOTE ON SERVICE PARTS LIST: 54-04-1810, 54-06-2610