EnerSys Alpha FXM HP 1100, Technical Manual

Page: 42 / 150

0170022-J0 Rev A Page 30
7.1.4 Switching the Alpha FXM HP from Inverter mode to Line mode
The Alpha FXM HP remains in the Inverter mode for as long as the AC input circuit breaker is switched
off, or until there is loss of AC power. Backup power is provided to the load until the batteries are drained
to a preset level which triggers the Alpha FXM HP to shutdown automatically. If it is not necessary to
operate the Alpha FXM HP in the Inverter mode, switch the Alpha FXM HP back to the Line mode as
soon as possible.
To switch the Alpha FXM HP from Inverter mode to Line mode:
1. Switch ON the AC input circuit breaker. The Alpha FXM qualifies the line power. The LCD
displays RETRAN , then shows LINE, BUCK 1, BUCK 2, BOOST 1, BOOST 2 .
If the Alpha FXM constantly switches between Inverter and Line modes because of a noisy line, broaden
the input parameter tolerances from Normal to Generator . See AC Input > AC Input Sense > Gener -
ator .