Eaton 9390 UPS (100–160 kVA) Installation and Operation Manual 164201604 Rev E www.eaton.com/powerquality 11-1Chapter 11 Responding to System Events11.1 GeneralWhen the UPS system is running in Normal mode, it continually monitors itself andthe incoming utility power. In Battery or Bypass modes, the UPS may issue alarms tolet you know exactly what event caused the change from Normal mode. Systemevents on the UPS can be indicated by horns, lights, messages, or all three.Select Events from the menu bar on the Main Menu screen to look at the ActiveSystem Events screen. This screen shows any currently active alarms, notices,or commands. For more information on using the Events screen, see paragraph 8.2.2,“Event Screens.”11.2 System Event HornsThe system event horn beeps to alert an operator that an event needing attention istaking place. Horn 1 cycles at a one-second rate.11.3 System Event IndicatorsThe status indicators on the UPS control panel work in conjunction with the eventhorn to let you know when the UPS system is operating in any mode other thanNormal. Only the Normal indicator is visible during normal UPS system operation. Theother indicators illuminate to indicate alarms or events. When an alarm occurs, youshould first check these indicators to see what type of event has taken place. Fordescriptions of the status indicators, see paragraph 8.5, “Reading the StatusIndicators.”11.4 System Event MessagesWhen a system event occurs, a message appears on the LCD in the UPS status area.This message is also written to the Active Events log and may be added to the EventsHistory log. The messages are divided into four categories: alarms, notices, status,and commands. The following tables contain the events displayed on the Eventsscreen of the control panel.Figure
