1KVA~20KVA LED/LCD ONLINE UPS INPUT:110V/220V OUTPUT:110V/220V LED/LCD ... problems Self test while start of the UPS Site wiring fault warning On-battery power-on function Smart RS232 communication ... vice versaLED IndicatorsStatusLoad level / Battery level, Battery , Utility Power, Inverter, Bypass, Overload, FaultAudible AlarmBypass, On battery mode, Battery low, Overload, FaultAcoustic NoiseAt ...