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TROUBLESHOOTING AND ERROR CODES
Error Codes
ERROR
CODE
DESCRIPTION
REASON/SOLUTION
F01
The battery voltage is still under 10V
(for a 12V battery) or 5V (for a 6V
battery) after 2 hours of charging.
The battery could be bad. Have it checked or replaced.
F02
The charger cannot desulfate the
battery.
The battery could not be desulfated; have it checked or
replaced.
F03
The battery was unable to reach the
“full charge” voltage.
May be caused by trying to charge a large battery or bank of
batteries on too low of a current setting. Try again with a higher
current setting or have the battery checked or replaced.
F04
The connections to the battery are
reversed.
The battery is connected backwards. Unplug the charger
and reverse the connections to the battery.
F05
The charger was unable to keep
the battery fully charged in maintain
mode.
The battery won’t hold a charge. May be caused by a drain
on the battery or the battery could be bad. Make sure there
are no loads on the battery. If there are remove them. If there
are none, have the battery checked or replaced.
F06
The charger detected that the
battery may be getting too hot
(thermal runaway).
The charger automatically shuts the current off if it
detects the battery may be getting too hot. Have the
battery checked or replaced.
If you get an error code, check the connections and settings and/or replace the battery.
Troubleshooting
PROBLEM
POSSIBLE CAUSE
REASON/SOLUTION
Battery clamps do not
spark when touched
together.
The charger is equipped with
an auto-start feature. It will not
supply current to the battery
clamps until a battery is properly
connected. The clamps will not
spark if touched together.
No problem; this is a normal
condition.
All three LEDs come
on for 2 seconds, then
turn off.
The charger is plugged into an
AC outlet.
No problem; this is normal.
The charger will not
turn on when properly
connected.
AC outlet is dead.
Poor electrical connection.
Battery is defective.
Check for open fuse or circuit
breaker supplying AC outlet.
Check power cord and extension
cord for loose fitting plug.
Have battery checked.
