Schumacher Electric SE-40MAP Owner's Manual page 15

PROBLEM
The charger is making an
audible clicking sound.
Charger makes a loud buzz
or hum.
Short or no start cycle when
cranking engine.
POSSIBLE CAUSE
Circuit breaker is cycling.
Battery is defective.
Shorted battery cables or
clips.
Severely discharged battery,
but otherwise it is a good
battery.
Reverse connections at
battery.
Transformer laminations
vibrate (buzz).
Shorted Diode Assembly or
Output Rectifier Assembly
(hum).
Drawing more than the
Engine Start Rate.
Failure to wait 4 minutes (240
seconds) between cranks.
Clips are not making a good
connection.
AC cord and/or extension
cord is loose.
No power at receptacle.
The charger may be
overheated.
Battery may be severely
discharged.
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REASON/SOLUTION
The settings may be wrong.
Check the charger settings.
Have the battery checked.
Circuit breaker cycles when
current draw is too high.
Check for shorted cables or
clips and replace if necessary.
The battery may not want to
accept a charge due to a run-
down state. Allow charging to
continue until battery has a
chance to recover sufficiently
to take a charge. If more than
20 minutes, stop charging and
have the battery checked.
Shut the charger off and
correct the lead connections.
No problem, this is a normal
condition.
Have charger checked by a
qualified technician.
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.
Wait 4 minutes of rest time
before the next crank to allow
the battery and charger to
cool down.
Check for poor connection at
battery and frame.
Check power cord and
extension cord for loose fitting
plug.
Check for open fuse or circuit
breaker supplying AC outlet.
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.
On a severely discharged
battery, charge for 10 to 15
minutes in the highest manual
rate to help assist in cranking.