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Troubleshooting
PROBLEM
No reading or 0.0V
shown on the display.
The Boost/Charging
LED does not turn off.
Short or no start cycle
when cranking engine.
Charger makes a loud
buzz.
Battery % stays low
during charging.
POSSIBLE CAUSE
Clamps are not making a
good connection.
AC cord and/or extension
cord is loose.
No power at receptacle.
Clamp polarity reversed.
The charger is still in Boost
mode.
The charger is still in one of
the charge modes.
Failure to wait 3 minutes (180
seconds) between cranks.
Clamps 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.
Transformer laminations
vibrate.
Battery is severely
discharged.
Wrong battery voltage
selected.
• 10 •
SOLUTION
Check for poor connection at
battery and frame. Make sure
connecting points are clean.
Check power cord and extension
cord for loose fitting plug.
Check for open fuse or circuit
breaker supplying AC outlet.
Verify and reverse the battery
clamps.
This is normal. In Boost mode, the
LED will not turn off until the
battery is disconnected from the
charger.
This is normal. In one of the charge
modes, the
LED will not turn off
until the battery charging process
is completed.
Wait three minutes or until the
display reads rdy and the
LED is on.
Check for poor connection at
battery and frame. Make sure
connecting points are clean.
Check power cord and extension
cord for loose fitting plug.
Check for open fuse or circuit
breaker supplying AC outlet.
The internal thermal protector may
have tripped and needs
a little longer to close. Wait until it
automatically resets and try again.
On a severely discharged battery,
use the
Boost rate for 10 to 15
minutes, to help assist in cranking.
No problem; this is a normal
condition.
Continue charging battery for two
more hours. If problem continues,
have the battery checked and
replace, if necessary.
Make sure Battery Voltage switch
is set to the correct voltage for the
battery you are charging.
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