6 Responding to system events

6.1 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 5.2.5, “Display menu operation” on page 51.

6.2 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.

6.3 System event indicators

The status indicators on the UPS control panel and the event horn 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, first check these indicators to see what type of event has taken place. For descriptions of the status indicators, see paragraph 5.2.1, “Status indicators” on page 49.

6.4 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 top line of the LCD scrolls all active notices and alarms.The top line of display blinks while scrolling when the system needs attention. Some notices and alarms may be accompanied by an audible horn.To silence the horn, press any control panel pushbutton once.

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UPS 450 - 550 kVA (2x225 - 2x275 kVA)

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Revision B

User’s and Installation Guide