Alpha Technologies FXM350_Micro350 UPS - Manual (Page 45)

43 017-241-B0 Rev B
7.2.1 Operating Modes
The Alpha FXM operating mode, (see Table A) automatically changes as a result of changes in the line. Refer
to Chapter 10, Specifications, for Boost/Buck/Line transfer thresholds. The LCD panel automatically updates
to reflect the change.
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
When the input voltage is lower than the nominal voltage, the Alpha FXM raises line voltage
without using the batteries. Automatic voltage regulation (AVR) is enabled.
BUCK1 The Alpha FXM lowers line voltage without using the batteries. AVR is enabled.
INVERTER
The Alpha FXM is providing backup battery power to the load. See INVERTER in Table B
on page 45.
RETRAN The Alpha FXM is transferring from INVERTER mode to Line mode.
TRAN The Alpha FXM is transferring from the state it is now in into Inverter mode.
STANDBY
The Alpha FXM is switched on and waiting for the line power to be qualified or the user to
clear some faults.
CAUTION: Do not touch the AC output terminals; they may still be energized.
BYPASS
This mode is manually set from the Control Menu. See Figure 28, “Control Menu, INV
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. AVR will be disabled.