Outback Power Systems GS4048A Operators Manual - Manual (Page 45)

Operation
900-0161-01-00 Rev A 43
 Cool Fan activates the AUX output when the inverter reaches a high internal temperature. It is intended to
trigger a small external fan for additional cooling. See the Warning Troubleshooting table on page 56 for a
description of the fan criteria.
∼ This function does not have settable parameters.
 DC Divert activates the AUX output to divert (or “dump”) excess renewable energy to a DC load, such as a
resistor, a heater, or a fuel cell. This prevents overcharging of the batteries. This function can serve as rough
charge regulation for an external charging source.
∼ When battery voltage rises above a settable high voltage level, the AUX output is activated after a
settable delay. The AUX output controls a larger, external relay. When energized, the relay allows
current to flow from the batteries to a dedicated DC load. (This is illustrated in the Radian Series
Inverter/Charger Installation Manual.) The resistor or load must be sized to dissipate all of the energy
from the renewable source if necessary. Diversion will turn off following a delay when a low DC voltage
setting is reached.
∼ Settable parameters include:
• Low and high DC voltage
• On and off delay
 GT Limits activates the AUX output as an alert that the utility grid does not meet Grid Interface Protection
parameters for the grid-interactive function (see page 15). It can activate a light or alarm to show that the
grid-interactive function has shut down and that there may be problems with the grid. The AUX output will
cycle on and off if grid parameters are met and the reconnection timer is counting down.
∼ This function does not have settable parameters other than those of the Grid Interface Protection
menu (see Table 16 beginning on page 65).
 Source Status activates the AUX output whenever the inverter accepts an AC source. It can activate a light
or alarm to show that the utility grid is present or that a generator has started. Alternately, it could be used
to show that the source has disconnected.
∼ This function does not have settable parameters.
 AC Divert activates the AUX output to divert (or “dump”) excess renewable energy to an AC load, usually an
AC device powered by the inverter itself. This prevents overcharging of the batteries. This function can
serve as rough charge regulation for an external charging source.
∼ When battery voltage rises above a settable high voltage level, the AUX output is activated after a
settable delay. The AUX output controls a larger relay, which allows current to flow from the batteries
to a dedicated AC load when energized. Diversion is usually used to regulate battery charging. The AC
device is usually wired to the output or load panel and must be left on. It must be sized to dissipate all
of the energy from the renewable source if necessary. Diversion will turn off following a delay when a
low DC voltage setting is reached.
∼ The AUX output will automatically turn on to run the loads if the inverter accepts an AC source.
∼ Settable parameters include:
• Low and high DC voltage
• On and off delay
∼ During variable conditions, the AUX output is triggered no more than once per minute (if voltage
conditions are still met). This prevents rapid nuisance cycling of the AC load.
∼ AC Divert should not be used as the sole source of battery regulation. If the inverter shuts down or fails,
the batteries could suffer severe damage. This function should be supported by an external regulator.
• If the inverter shuts down due to overload, the AUX output will also shut down. If the inverter
load exceeds 30 Aac, the AUX output will turn off to prevent an overload condition.
• If either the FETs or the capacitors (see page 56) become too hot, the AUX will turn off due to
diminished inverter wattage capacity.