Alarms and Events

5.0 Alarms and Events

Alarms are indicated by the red lamp (above the left hand corner of the keyboard) and a 30 seconds acoustic signal. An alarm is registered in the alarm stack as long as it is present, and if more in the same order as they arise.

Certain alarms, such as battery alarms, need resetting. See section 4.0 Parameter Settings.

All alarms are also registered in an event logger and remains there in a stack with room for 250 events. The events are stored in the same order as they arose - showing the latest first.

Besides the alarms the following operational modes are also stored in the event logger.

Mode	Comments
MPU is reset	UPS has been completely switched off
Stand-by	UPS has been in stand-by mode by parallel system
Normal operation	UPS has been in normal operation
Battery operation	UPS has been in battery operation
Bypass operation	UPS has been in bypass operation
System off	UPS has been off

5.1Displaying the Alarm Stack

Action			Description
1.	Press		Access to the alarm stack.
2.	Press	or	Scroll up or down through the alarm stack
			messages.
			Last message is "No (further) alarm".
3.	Press		Exits the alarm stack. If not operated the system
			will exit the alarm stack automatically after 30
			seconds.

5.2Displaying the Event Stack

Action

1.Press

2.Press

3.Press

4.Press

	Description
and	Press the two keys simultaneously to get access
	to the events stack
or	Scroll up or down through the event stack
	(last message is "No (further) event").
	Displays the time where the event happened.
	Exits the event stack. If not operated the system
	will exit the event stack automatically after 30
	seconds.

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24	User Guide APC Silcon 480kW 400V UPS