Alpha Technologies FXM350_Micro350 UPS User Manual

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017-241-B0 Rev B

6.2.3 Standby Mode

The FXM350 displays STANDBY when the DC breaker is closed (unit is ON), but no AC is present. When the

AC input circuit breaker is switched on and line power is qualified, the Alpha FXM switches to LINE mode. If

AC is within specifications, the FXM provides automatic voltage regulation (AVR).

6.2.4 Shutdown Mode

The FXM/Micro350 can be shut down by switching off the AC breaker and the DC breaker.
The unit can also be shut down from the front panel LCD or remotely through the USB and SNMP.
If the Shutdown command is applied in Back Up mode, the unit shuts the inverter and opens the grid relay

(Figure 26).
If in Line mode, the grid relay is opened and the inverter disabled.
The FXM350 can be removed from Shutdown mode by manually resetting the AC and DC breakers or from

the LCD or the web pages.

6.2.5 Fault Mode

If a fault occurs on the FXM (red LED solidly illuminated), the unit goes into Shutdown mode until the fault is

cleared and reset. See Table P for a list of faults and to clear the fault, see Figure 28.