Outback FXR2012A Operator's Manual page 31


The voltage limits can be adjusted to allow (or exclude) a source with weak or irregular voltages.
These items are adjustable in the appropriate menu of the MATE3 (Grid AC Input Mode and Limits or
Gen AC Input Mode and Limits). The settings are titled Voltage Limit Lower and Upper. There can be side
effects to changing the range of allowed voltages.

Each of the AC input selections has a settable Connect Delay. This is intended as a warmup period which
allows an input source to stabilize before connection.

The default setting for the Grid selection is 0.2 minutes (12 seconds).

The default setting for the Gen selection is 0.5 minutes (30 seconds).
These items are adjustable in the appropriate menu of the MATE3 (Grid AC Input Mode and Limits or Gen
AC Input Mode and Limits).
NOTES:

The Grid Tied input mode does not use these acceptance limits and uses the Grid Interface Protection
settings instead. (See page 20 for more information.) The inverter may not accept AC power if it meets the
settings noted here but does not meet the Grid Interface Protection settings.

Certain input modes
conditions are met. (See page 22.)
Several items external to the inverter may prevent the inverter from accepting AC power even if electrical
conditions are met. Some examples are the High Battery Transfer, Grid Usage Time, or Load Grid Transfer
functions, all of which are operated by the MATE3 system display. (See page 53.) Another example is the
MATE3's AC INPUT hot key menu, which can order all inverters to disconnect when set to Drop.
Multiple Inverters
In a stacked system, whenever the master inverter senses acceptable input, it orders all other inverters
to transfer to the AC source. The other inverters do not use their own input readings to transfer. It is
expected that the AC source delivers input (in the appropriate phase) to all inverters.

A subphase master inverter may receive this command while not sensing acceptable input. It may have no
input, or it may sense incorrect input. The inverter will not transfer and will continue inverting (in the
correct phase). It will display a Phase Loss warning (see page 63).

If a slave inverter does not sense acceptable input, it will not transfer, but also will not invert. The slave will
have no output. It also will display a Phase Loss warning.

In either case, this warning appears as an Event on the MATE3 system display.
The FXR inverter's stacking function includes the option called Multi-Phase Coordination. The
selectable menu item is Coordinated AC Connect/Disconnect. If selected, the AC source is required
to deliver input (in the appropriate phase) to all inverters.

If the master or subphase master inverters do not sense an acceptable AC source, the entire system will
disconnect from the source.

None of the inverters will reconnect until the source is acceptable for the duration of the appropriate timer.
This may be either the Connect Delay or the Re-Connect Delay timer. See page 21.

This function does not apply to slave inverters. A slave inverter with an unacceptable AC source will not
cause a general System Disconnect.

A general System Disconnect will not cause the inverters to show a Phase Loss warning.
See page 21 for more information on Multi-Phase Coordination. See page 43 for more information on
stacking. See the menu tables beginning on page 76 for the default settings and ranges.
900-0167-01-00 Rev A
s
uch as Mini Grid may prevent the inverter from accepting AC power even if electrical
Operation
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