... the UPSSite wiring fault warningOn-battery power-on functionSmart RS232 communication interfaceIntelligent slot availableSealed ... full load dischargeBypass Automatic Transferon overload and UPS failureBefore UPS Power-onDefault NO, user adjustable to YESVoltage ... IndicatorsStatusLoad level / Battery level, Battery , Utility Power, Inverter, Bypass, Overload, FaultAudible AlarmBypass, On battery ...