Schumacher SC1308 Owner's Manual page 9

PROBLEM
Engine start does
not work.
I cannot select a 6V or
12V setting.
I press the display
button, but do not
see the percentage of
charge.
The display shows
"bAD / bAt / F01 ".
The display shows
"bAD / bAt / F02".
The display shows
"bAD / bAt / F05".
POSSIBLE CAUSE
Drawing more than 100 amps.
Failure to wait 3 minutes (180
seconds) between cranks.
The charger may be
overheated.
Battery may be severely
discharged.
The charger is equipped
with Auto Voltage Detection,
which automatically detects
the voltage and charges the
battery.
When first connected to a
battery, the display shows
voltage only.
The battery voltage is still
below 10V (for a 12V battery)
or 5V (for a 6V battery) after 2
hours of charging.
Desulfation was unsuccessful,
after 10 hours.
Lack of progress is detected
after 12 hours in Maintain mode.
SOLUTION
Crank time varies with the amount
of current drawn. If cranking draws
more than 100 amps, crank time
may be less than 5 seconds.
When the countdown from 180 to
0 is displayed, wait until the display
shows "rdy" for the next crank.
The thermal protector may have
tripped and needs a little longer
to reset. Make sure the charger
vents are not blocked. Wait and try
again.
On a severely discharged battery,
use the 30A Boost rate for 10
to 15 minutes, to help assist in
cranking.
No problem; this is normal.
This is normal. The percentage
of charge is only displayed during
charging.
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 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.