Schumacher Electric SC1305 Owner's Manual page 8

PROBLEM
Short or no start cycle
when cranking engine.
The red LED is lit.
POSSIBLE CAUSE
No power at receptacle.
AC cord and/or extension cord
is loose.
The clamps are not making a
good connection.
Failure to wait 3 minutes (180
seconds) between cranks.
The battery may be severely
discharged.
The battery is drawing more
than the Engine Start Rate.
The charger may be
overheated.
The battery voltage is still
below 10V after 2 hours of
charging.
(or)
In maintain mode, the output
current is more than 1.5A for
12 hours.
Desulfation was unsuccessful.
Lack of progress is detected
and battery voltage is below
14.2V.
The battery's initial voltage is
below 12.2V and the total input
is less than 1.5 Ah.
The battery voltage drops to
below 12.2V in Maintain Mode.
Check for open fuse or circuit
breaker supplying AC outlet.
Check power cord and extension
cord for loose fitting plug.
Check for poor connection at
battery and frame.
Wait 3 minutes of rest time before
the next crank, to allow the battery
and charger to cool down.
On a severely discharged battery,
use the 10A Boost setting for few
minutes, to help assist in cranking.
Crank time varies with the amount
of current drawn. If cranking draws
more than the Engine Start Rate,
crank time may be less than 3
seconds.
The thermal protector may have
tripped and needs a little longer to
close. Make sure the charger vents
are not blocked. Wait and try again.
The battery may be defective. Make
sure there are no loads on the
battery. If there are, remove them.
If there are none, have the battery
checked or replaced.
The battery may be defective. Have
battery checked or replaced.
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.
• 8 •
SOLUTION