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Schumacher PSW-7700 Troubleshooting Guide
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PROBLEM
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POSSIBLE CAUSE
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SOLUTION
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No reading on the ammeter.
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Charger is not plugged in.
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Plug the charger into an AC
outlet.
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No power
at the receptacle.
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Check for open fuse or circuit
breaker supplying AC outlet.
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Clips
are not making a good connection to the battery.
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Check for poor connection to
battery and frame. Make sure connection points are clean. Rock clips back and
forth for a better connection.
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Connections
are reversed.
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Unplug the charger and reverse
the clips.
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Battery is defective (will not accept a
charge).
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Have battery checked..
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Ammeter reading stays high.
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Battery is severely discharged.
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Continue charging battery for
two more hours. If problem continues have the battery checked.
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The
settings may be wrong for the battery voltage needed.
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Check the charger settings and
battery voltage.
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The charger is making an audible clicking sound.
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Circuit breaker is cycling.
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The settings may be wrong. Check
the charger settings.
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Battery
is defective.
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Have the battery checked.
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Shorted
battery cables or clips.
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Circuit breaker cycles when
current draw is too high. Check for shorted cables or clips and replace if
necessary.
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Severely
discharged battery, but otherwise it is a good battery.
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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.
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Reverse
connections at battery.
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Shut the charger off and correct
the lead connections.
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Charger makes a loud buzz or hum.
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Transformer laminations vibrate
(buzz).
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No problem, this is a normal
condition.
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Shorted
Diode Assembly or Output Rectifier Assembly (hum).
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Have charger checked by a
qualified technician.
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Short or no start cycle when cranking engine.
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Drawing more than 300 amps
(12V).
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Crank time varies with the
amount of current drawn. If cranking draws more than 300 amps, crank time may
be less than 3 seconds.
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Failure
to wait 5 minutes (300 seconds) between cranks.
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Wait 5 minutes of rest time
before the next crank.
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Clips
are not making a good connection.
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Check for poor connection at
battery and frame.
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AC cord
and/or extension cord is loose.
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Check power cord and extension
cord for loose fitting plug.
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No power
at receptacle.
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Check for open fuse or circuit
breaker supplying AC outlet.
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The
charger may be overheated.
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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.
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Battery
may be severely discharged.
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On a severely discharged
battery, charge for 10 to 15 minutes in the manual rate to help assist in
cranking.
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The
battery is connected and the charger is on, but is not charging.
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Clips are not making a good
connection.
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Check for poor connection at
battery and frame. Make sure connecting points are clean. Rock clips back and
forth for a better connection.
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Schumacher User Manual Link
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