Schumacher SWI-1555A owner manual Troubleshooting, Problem Possible Cause REASON/SOLUTION

FAILURE	DESCRIPTION	CAUSE
CODE
	The battery was unable to reach	Could be caused by trying to charge a large
F03		battery or bank of batteries on too low of a
	the “full charged” voltage (thermal	current setting or the battery may have a shorted
	runaway detected).	cell. Try again with a higher current setting or
		have the battery checked or replaced.
	The charger was unable to	The battery won’t hold a charge. Could be
F05		caused by a drain on the battery or the battery
	keep the battery fully charged in	could be bad. Make sure there are no loads on
	maintain mode.	the battery. If there are remove them. If there are
		none, have the battery checked or replaced.
	The charger detected that the	The charger automatically shuts the current off
		if it detects the battery may be getting too hot or
F06	battery may be getting too hot
		the battery may have a shorted cell. Have the
	(thermal runaway).
		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	The charger is equipped with	No problem, this is a normal
when touched together.	an auto-start feature. It will not	condition.
	supply current to the battery
	clips until a battery is properly
	connected. Meaning, the
	clips will not spark if touched
	together.
The charger is making an	Circuit breaker is cycling.	The settings may be wrong.
audible clicking sound.		Check the charger settings.
	Battery is defective.	Have the battery checked.
	Shorted battery cables or clips.	Circuit breaker cycles when
		current draw is too high. Check
		for shorted cables or clips and
		replace if necessary.
	Severely discharged battery,	The battery may not want
	but otherwise it is a good	to accept a charge due to a
	battery.	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.
	Reverse connections at battery.	Shut the charger off and correct
		the lead connections.
Charger makes a loud buzz	Transformer laminations vibrate	No problem, this is a normal
or hum.	(buzz).	condition.
	Shorted Diode Assembly or	Have charger checked by a
	Output Rectifier Assembly	qualified technician.
	(hum).

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