12-1EATON Powerware® 9390 UPS (100–160 kVA) Installation and Operation Manual S 164201554 Rev E powerware.comChapter 12 Responding to System Events12.1 GeneralWhen the UPS system is running in Normal mode, it continually monitors itself and theincoming utility power. In Battery or Bypass modes, the UPS may issue alarms to let youknow exactly what event caused the change from Normal mode. System events on the UPScan be indicated by horns, lights, messages, or all three.Select Events from the menu bar on the Main Menu screen to look at the Active SystemEvents screen. This screen shows any currently active alarms, notices, or commands. Formore information on using the Events screen, see paragraph 9.2.2, “Event Screens.”12.2 System Event HornsThe system event horn beeps to alert an operator that an event needing attention is takingplace. Horn 1 cycles at a one-second rate.12.3 System Event IndicatorsThe status indicators on the UPS control panel work in conjunction with the event horn tolet you know when the UPS system is operating in any mode other than Normal. Only theNormal indicator is visible during normal UPS system operation. The other indicatorsilluminate to indicate alarms or events. When an alarm occurs, you should first check theseindicators to see what type of event has taken place. For descriptions of the statusindicators, see paragraph 9.5, “Reading the Status Indicators.”12.4 System Event MessagesWhen a system event occurs, a message appears on the LCD in the UPS status area. Thismessage is also written to the Active Events log and may be added to the Events Historylog. The messages are divided into four categories: alarms, notices, status, and commands.The following tables contain the events displayed on the Events screen of the controlpanel.
