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Schumacher SS-120A-PE
Troubleshooting Guide
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PROBLEM
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POSSIBLE CAUSE
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SOLUTION
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Red LED doesn't light (Automatic Mode).
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Charger is not plugged in.
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Plug in.
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Connections
are reversed.
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With charger unplugged, reverse
clamps and reconnect. (Rock back and forth to bite in.)
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Poor
electrical connection.
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Clean clamps and battery posts
and reconnect. (Rock back and forth to bite in.)
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AC
outlet is dead.
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Plug in a lamp or other
appliance to check for voltage.
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Charger
will not turn ON when properly connected to power.
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Battery voltage is less than one
volt.
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Switch to MANUAL position for a
few minutes.
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Battery
recently used in vehicle and is fully charged
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Battery doesn't need charging.
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Charger will not turn OFF.
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Battery has problem and will not
take full charge.
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Have battery checked.
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Two (or
more) batteries connected in parallel.
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Do not charge two batteries at
the same time.
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Battery
of 200 ampere hours or larger.
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Requires more time to charge:
continue charging.
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Battery
is connected to application that draws a small current (such as a vehicle's
dome light).
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Requires more time to charge:
continue charging.
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Charger
is in manual position.
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You MUST unplug battery charger
manually.
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Schumacher User Manuals Link
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