Outback Power Systems GS4048A Operators Manual - Manual (Page 44)

Operation
42 900-0161-01-00 Rev A
output voltage drops below a specific AC voltage for more than 3 seconds. This voltage limit is 30 volts
below the setting of the inverter’s output voltage. For the Radian’s default output voltage of 240 Vac,
the limit is 210 Vac, or 105 Vac if output L1 or L2 decrease in voltage independently. (See page 67.)
The limit is not otherwise settable.
∼ Load Shed will also turn off if the input current exceeds the Input AC Limit setting while the inverter is
using an AC source.
∼ Settable parameters include:
• Low and high DC voltage
• On and off delay
 Gen Alert is used as a controller for an AC generator with a remote start feature, although it has limited
functionality. (The generator recharges batteries using the inverter’s battery charger.)
∼ Either set of AUC terminals may be used to start the generator by closing the appropriate circuit. The
specific choice of RELAY AUX or 12V AUX may depend on the generator’s starting circuitry. Different
examples are illustrated in the Radian Series Inverter/Charger Installation Manual.
∼ The AUX output will activate to start the generator when the battery voltage falls to a low set point for a
settable delay. The AUX output is deactivated, shutting off the generator, once the battery voltage rises
to a high voltage setting for a settable delay period.
∼ Settable parameters include:
• Low and high DC voltage
• On and off delay
∼ Gen Alert control logic is located in the inverter. It has the advantage of functioning when the system
display is removed. However, it may not completely charge the batteries and does not have all the
advantages of the Advanced Generator Start (AGS) function that is found in the system display. For
many users, the AGS function may prove more useful than Gen Alert. Gen Alert, however, could be
used as a literal “Generator Alert”, a signal to the user to manually start a generator.
NOTE: Gen Alert is the default selection for the RELAY AUX settings.
IMPORTANT:
When using Gen Alert (or AGS), the generator must be connected to the inverter’s GEN
terminals. If the input priority is set to GRID and the GRID terminals are energized, an
automatically controlled generator will shut down. This prevents an automatic generator from
working correctly when using the
GRID terminals.
 Fault activates the AUX output when the inverter shuts down due to an error condition (see page 55). It can
activate a light or alarm to show that the inverter has failed. With the appropriate devices, it could send an
alarm signal through a radio, pager, or telephone dialer.
∼ This function does not have settable parameters.
 Vent Fan activates the AUX output in response to a high DC (battery) voltage set point. It can run a small
fan to ventilate the battery compartment to eliminate gases that result from battery charging. (This is
illustrated in the Radian Series Inverter/Charger Installation Manual.) When the voltage falls below this set
point for a settable delay period, the AUX output turns off.
∼ Settable parameters include:
• High DC voltage
• Off delay
NOTE: Vent Fan is the default selection for the 12V AUX settings.