Powerware 9390 UPS 100160 kVA - Manual (Page 127)

EATON Powerware ® 9390 UPS (20–80 kVA) Installation and Operation Manual S 164201603 Rev 2 www.powerware.com 11-1
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 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
other indicators illuminate 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 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.
Figure