Emerson 250-400kVA manual Observe the One-Line Display and the Active Event

			UPS Alarm and Status Messages
Table 7	Liebert NXL alarm and status messages (continued)
Event Message		Event Definition	Recommended Action
			Observe the One-Line Display and the Active Event
			Window for current UPS condition - On Battery?
			Observe the color of the Bypass Line on the One-
			Line Display. If green, bypass is available. This is
			significant, because if the batteries fail, the UPS
			transfers safely to the bypass line.
			If the UPS is on battery, and the bypass line on the
			One-Line Display is not green, contact your factory-
			authorized service provider immediately and
			prepare to shut down as the UPS turns off once the
		This summary event indicates a potentially	batteries are depleted. Press “SILENCE” to silence
			the audible alarm.
		serious condition in the Rectifier circuit. The
			Press “RESET” to attempt to clear the fault
		controls respond to this by turning off the
			condition. If the Rectifier Fault clears, press
		Rectifier, opening the input filter contactor, and
			“Startup,” “Manual Start,” “Rectifier” to attempt to
Rectifier Fault		placing the UPS on battery operation.
			restart the Rectifier.
		This fault is non-latching. When the underlying
			If this is successful, observe normal operation of the
		condition is no longer present, this fault and any
			Rectifier, indicated on the One-Line Display by a
		control activity tied directly to this fault reverts to
			green outline around the Rectifier box, and normal
		normal.
			DC Bus voltage on the DC Bus Meter. If the
			Rectifier starts normally, attempt to close the input
			filter contactor by pressing “Startup,” “Device
			Control", "Close Trap".
			If the UPS is not on battery, but transferred to
			bypass, contact your factory-authorized service
			provider.
			If the Rectifier Fault was cleared by pressing
			"RESET", but the fault returns as soon as a Rectifier
			restart is attempted, contact your factory-authorized
			service provider.
Redundant Fan		This alarm indicates a fan has failed	Press “SILENCE” to silence the audible alarm.
Fail			Contact your factory-authorized service provider.
		Regeneration Mode is a service mode that is
		normally controlled by the service technician.
		Regeneration Mode Status or Alarm messages	Under normal circumstances, none.
		are generally intended for the service person.
			If this message is active, and there is no clear
Regen Active		This status message informs the user the UPS is
			reason why the UPS is in Regeneration Mode,
		in Regeneration Mode.
			contact your factory-authorized service provider.
		This status message is self-clearing. When the
		condition is no longer present, the alarm and any
		control activity tied to the alarm reverts to normal.
		Regeneration Mode was initiated and terminated
		because of an abnormal condition.
		Once Regeneration Mode is active, any condition,
		for example an Inverter Overload, other than the
		user manually stopping Regeneration Mode,	Press “SILENCE” to silence the audible alarm.
		causes this message to appear.
		Regeneration Mode is a service mode that is	Press “RESET” to attempt to clear the alarm.
Regen Failure		normally controlled by the service technician.	If Regeneration Mode was not manually initiated by
		Regeneration Mode Status or Alarm messages	service, or if this alarm will not reset, contact your
		are generally intended for the service person.	factory-authorized service provider.
		This status message informs the user the UPS is
		in Regeneration Mode.
		This status message is self-clearing. When the
		condition is no longer present, the alarm and any
		control activity tied to the alarm reverts to normal.

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