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FAILURE
CODE
DESCRIPTION CAUSE
F03
The battery was unable to reach
the “full charged” voltage (thermal
runaway detected).
Could be caused by trying to charge a large
battery or bank of batteries on too low of a
current setting or the battery may have a shorted
cell. Try again with a higher current setting or
have the battery checked or replaced.
F05
The charger was unable to
keep the battery fully charged in
maintain mode.
The battery won’t hold a charge. Could 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 or
the battery may have a shorted cell. Have the
battery checked or replaced.
If you get a failure code, you have to check the connections and settings and/or replace
the battery.
Troubleshooting
PROBLEM POSSIBLE CAUSE REASON/SOLUTION
Battery clips do not spark
when touched together.
The charger is equipped with
an auto-start feature. It will not
supply current to the battery
clips until a battery is properly
connected. Meaning, the
clips will not spark if touched
together.
No problem, this is a normal
condition.
The charger is making an
audible clicking sound.
Circuit breaker is cycling.
Battery is defective.
Shorted battery cables or clips.
Severely discharged battery,
but otherwise it is a good
battery.
Reverse connections at battery.
The settings may be wrong.
Check the charger settings.
Have the battery checked.
Circuit breaker cycles when
current draw is too high. Check
for shorted cables or clips 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 sufciently
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 Rectier Assembly
(hum).
No problem, this is a normal
condition.
Have charger checked by a
qualied technician.