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WWW.FORNEYIND.COM
STORAGE INSTRUCTIONS
1. Store charger unplugged. Cord will still conduct electricity until it is unplugged from outlet.
2. Store inside, in a dry, cool place.
3. Do not store cable connectors on or around metal or clipped together.
TROUBLESHOOTING
PROBLEM
POSSIBLE CAUSE
SOLUTION
The charger is making an
audible clicking sound.
This battery charger is
equipped with a self-resetting
circuit breaker. This device
protects the charger from
temporary overloads. In the
event of an overload, the
breaker will trip open and
after a short cooling off period
will reset automatically. This
process is known as cycling
and can be recognized by an
audible clicking sound.
Battery is defective.
Shorted battery cables or ring terminals.
Severely discharged battery, but otherwise
it is a good battery.
Reverse connections at battery.
Have the battery checked.
Circuit breaker cycles when current draw is too
high. Check for shorted cables or cable clamps
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.
Charger makes a loud buzz
or hum.
Transformer laminations vibrate (buzz).
Shorted Diode Assembly or Output
Rectifier Assembly (hum).
No problem, this is a normal condition.
Have charger checked by a qualified
technician.
POWER ON (red) LED is not
lit. Charger will not turn on
when properly connected.
No power at the receptacle.
Charger is not plugged in.
Poor electrical connection.
Check for open fuse or circuit breaker supplying
AC outlet.
Plug the charger into an AC outlet.
Check power cord and extension cord for loose
fitting plug.
The battery is connected and
the charger is on, but is not
charging.
Cable clamps are not making a good
connection to the battery.
Connections are reversed.
Battery is defective (will not accept a charge).
Severely discharged battery, but otherwise
it is a good battery.
Check for poor connection to battery and
frame. Make sure connection points are clean.
Unplug the charger and reverse the battery
connections.
Have battery checked.
The battery must measure at least 1 volt to start
the charging process. If it is under 1 volt you
must charge it using a separate charger to get
the voltage up to at least 1 volt before you can
use the Forney 52720.
When you start the battery
charger without an electric load
or battery connected and you
input 120V AC into the charger,
the output port will show no
voltage if tested with a meter.
This is an advantage design to avoid
sudden short circuit through two clamps.
It is normal.
Once you connect the battery charger with a
driving voltage to the output port (the driving
voltage must be equal or higher than 1.2V DC),
you will see on the output port that the output
voltage rises from 0 V DC to about 13.15 V DC
immediately.
