Alpha Technologies FXM350_Micro350 UPS User Manual

Page 43

017-241-B0 Rev B

7.1.4 Switching the Alpha FXM from Standby mode to Inverter mode

When AC is not present and the loads need AC Power, the Alpha FXM can be forced to output AC using

energy from the batteries. To force the inverter on, refer to the CONTROL MENU, shown in Figure 28, and

INVERTER

in Table B.

7.1.5 Switching the Alpha FXM from Inverter mode to Line mode

The Alpha FXM remains in the Inverter mode for as long as the input circuit breaker is switched off. Backup

power is provided to the load until the batteries are drained to a preset level which triggers the Alpha FXM

to shutdown automatically. If it is not necessary to operate the Alpha FXM in the Inverter mode, switch the

Alpha FXM back to the Line mode as soon as possible by closing the AC input circuit breaker.

Procedure

1. 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.(See Table A on page 43). The status LED illuminates

steadily.

If the Alpha FXM constantly switches between INVERTER and LINE modes because of frequent disturbanc-

es on the line, the Alpha FXM input parameters should be broadened from Normal to Generator. See Table B,

Sense Type

. Also see the specifications: “Boost/Buck/Line Transfer Thresholds”.

In the Generator mode, the range of acceptable input frequency and voltage are expanded to accept fluctua-

tions and disturbances as created by a generator.