• 11 •
PROBLEM
POSSIBLE CAUSE
SOLUTION
The red
BAD
BATTERY LED is lit.
The battery is sulfated.
Lack of progress is detected and
battery voltage is below 14.2V (for
a 12V battery) or 7.1V (for a 6V
battery).
The battery’s initial voltage is below
12.2V (for a 12V battery) or 6.1V (for
a 6V battery) and the total input is
less than 1.5 Ah.
The battery voltage drops to below
12.2V (for a 12V battery) or 6.1V
(for a 6V battery) in Maintain Mode.
The charger is in desulfation
mode. Continue charging for
several hours. If not successful,
have the battery checked.
The battery may be overheated.
If so, allow the battery to cool.
The battery may be too large or
have a short circuit. Have battery
checked or replaced.
The battery capacity is too low,
or the battery is too old. Have it
checked or replaced.
The battery won’t hold a charge.
May be caused by a drain on
the battery or the battery could
be bad. Make sure there are no
loads on the battery. If there are
remove them. If there are none,
have the battery checked or
replaced.
15. BEFORE RETURNING FOR REPAIRS
For information about troubleshooting,
contact customer service for assistance:
www.batterychargers.com
or call 1-800-621-5485, Monday-Friday 7:00
am
to 5:00
pm
CST
For REPAIR OR RETURN, contact Customer Service at 1-800-621-5485.
DO NOT SHIP UNIT until you receive a RETURN MERCHANDISE
AUTHORIZATION (RMA)
number from Customer Service at Schumacher
Electric Corporation.