Alpha Technologies FXM350_Micro350 UPS - Manual (Page 42)

017-241-B0 Rev B 40
7. Operating the FXM350
7.1 Switching the Alpha FXM On and Off
Under normal operation, the Alpha FXM is always powered ON to supply uninterruptible power to the load.
Switching off the Alpha FXM will disconnect the power supply to the load. If for any reason you need to
switch off the Alpha FXM while maintaining power to your critical load, make sure that you have a plan that
provides an alternate source of power.
7.1.1 Switch Off Procedure
1. Switch off the AC input circuit breaker.
2. Switch off the battery circuit breaker.
The status LED turns off and the LCD panel goes blank. The Alpha FXM is now switched off and no backup
power is supplied to the load.
7.1.2 Switch On Procedure (LINE mode)
Before you put the Alpha FXM back into commission, make sure that the line is qualified and the batteries are
fully charged.
1. Switch on the battery circuit breaker. The LCD displays STANDBY and the fan turns on for about a
minute. If the temperature is below –15ºC, the LCD display may not function. See Chapter 9.
2. Switch on the AC input circuit breaker. The Alpha FXM qualifies the line power. The LCD displays
RETRAN , then shows LINE, or BUCK or BOOST, depending on the line voltage. (See Table A on page
43). The status LED illuminates.
3. If there is no line power, the Alpha FXM remains in STANDBY mode until the line power is qualified. To
provide backup battery power to the load, perform a manual start by using the Inverter command:
From the Control Menu, scroll till the LCD displays Inverter, press Select and select ON. See("Figure
28 — LCD Menu Tree" on page 44).
The Alpha FXM uses auto-frequency detection. When it is first switched on, it senses the line frequency and
adjusts its output frequency to match that of the input. The load should be receiving power, If not, perform
troubleshooting.
7.1.3 Switching the Alpha FXM from Line mode to Inverter mode
You can force the Alpha FXM to operate in the Inverter mode by manually switching off the input circuit break-
er when in Line mode. Doing so effectively disconnects any line power to the Alpha FXM simulating a power
outage which triggers the Alpha FXM to switch to the inverter mode of operation.
Procedure:
1. Switch off the input circuit breaker. The LCD shows INVERTER, the status LED starts flashing to show
that the Alpha FXM is running on backup battery power. Confirm that the load is receiving power.