The Alpha FXM operating mode automatically changes as a result of changes in the line or the Alpha FXM
operating mode. (The LCD panel automatically updates to reflect the new mode. See Table A and also "Table V —
Boost/Buck/Line Transfer Thresholds" on page 82.
Table A — UPS Operating Modes
LCD display
Description
SHUTDOWN
The Alpha FXM inverter is switched off. Line power is disconnected from the load.
LINE
The Alpha FXM is switched on. Line power is provided to the load.
BOOST1 OR BOOST2
The Alpha FXM transformer is raising line voltage without using the batteries. AVR is
enabled.
BUCK1 OR BUCK2
The Alpha FXM transformer is lowering line voltage without using the batteries. AVR
is enabled.
INVERTER
The Alpha FXM is providing backup battery power to the load.
RETRAN
The Alpha FXM is transferring from INVERTER mode to Line mode.
STANDBY
The Alpha FXM is switched on and waiting for the line power to qualify or the user to
clear some faults.
CAUTION: Do not touch the AC output terminals, which may still be energized.
BYPASS
This mode is manually set with the Control Menu. See Figure 11, “Control Menu,
BYPASS”. This locks the unit into line mode and turns off the battery charger so the
unit can work with a manual break-before-make bypass switch.
Figure 10 — LCD Menu Structure
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