... indication and alarm function 1.True high frenquence On-line double conversion technology2.Rack mount type3.Wide ... Crest Ratio3:01 Bypass Automatic Transferon overload and UPS failure Before UPS Power-onDefault “NO”, user adjustable to “YES ... level, Battery , Utility Power, Inverter, Bypass, Audible AlarmBypass, On battery mode, Battery low, Overload, Fault CommunicationsRS-232 Serial ...