Product Manual
8
Troubleshooting
If the red Over-temperature LED and the audible alarm come on, the unit has overheated,
and it will shut down until it cools off sufciently. You may not have allowed sufcient space
around the unit for cooling, or there may be too many devices connected to the output of
the unit. Either reduce the number of devices connected to the unit, or reposition the unit for
better cooling. If necessary, direct a stream of moving air over the unit.
If the yellow Low Input LED comes on, the input voltage has dropped below 19 VDC (27 VDC
on the -24 version). To keep from completely discharging the batteries (if the battery charger
is being operated from batteries), the unit will shut down until the voltage recovers to 21 VDC
(29 VDC on the -24 version). Make sure that the charging system is operating properly, and
that the wires connecting the input voltage to the unit are not corroded or damaged.
If the red Charging LED, the Low Output LED and the audible alarm come on, and the green
Output On LED is completely off, the output of the unit has been shorted out, or there has been
an internal failure. Turn the unit off, disconnect the charging battery bank(s) connected to it,
and turn it back on again. If it comes on normally, then either one of the battery banks or the
output connections have become shorted. To determine the cause of the fault, rst check to be
sure that the ouput terminals are not shorted, then reconnect the battery banks one at a time
to see which battery bank is the cause of the fault. If one of the battery banks is the cause
of the short it must be replaced. If the condition still exists even after the battery banks have
been disconnected, the unit is defective, and must be returned to the factory or an authorized
service center for repair.
If the unit will not turn on at all, check the input fuse. If it is blown, replace it with a new one.
If that fuse blows as well or the unit still will not turn on, it is defective, and must be returned
to the factory or an authorized service center for repair.
banks according to their relative states of charge. During this time, the red ‘Charging’ LED will
be on.
If the batteries are seriously discharged, the ‘Low Output’ LED and the audible alarm will also
come on. After a period of time, which may be minutes to hours, the batteries will reach the
oat voltage, and the charging current will reduce as necessary to maintain the batteries at
that voltage. Once this happens, the red ‘Charging’ LED will go off. You may now check the
oat voltage at the output terminals of the unit with a good digital voltmeter. As shipped from
the factory, the unit is preset to 13.6 volts, which is generally recommended for lead-acid
batteries. The generally recommended voltage for gel type batteries is 13.9 volts. Your battery
supplier may also recommend a different voltage. If you need to adjust the oat voltage, refer
to the section above for the correct procedure.