Powerware 9390, Installation & Operation Manual, Page: 85 / 138

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Powerware
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9390 UPS (40–80 kVA) Installation and Operation Manual
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164201535 Rev A
Chapter 11 Responding to System Events
11.1 General
When the UPS system is running in Normal mode, it continually monitors itself and the
incoming utility power. In Battery or Bypass modes, the UPS may issue alarms to let you
know exactly what event caused the change from Normal mode. System events 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 Active System
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 Horns
The system event horn beeps to alert an operator that an event needing attention is taking
place. Horn 1 cycles on for 1 second at a one second rate.
11.3 System Event Indicators
The status indicators on the UPS control panel work in conjunction with the event horn to
let you know when the UPS system is operating in any mode other than Normal. Only the
Normal indicator is visible during normal UPS system operation. The others light to
indicate alarms or events. When an alarm occurs, you should first check these indicators to
see what type of event has taken place. (For descriptions of the status indicators, see
paragraph 8.5 “Reading the Status Indicators.”)
11.4 System Event Messages
When a system event occurs, a message appears on the LCD in the UPS status area. This
message is also is written to the Active Events log and may be added to the Events History
log. 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 control
panel.