Emerson 250-400kVA manual Observe the One-Line Display. If the input line is

			UPS Alarm and Status Messages
Table 7	Liebert NXL alarm and status messages (continued)
Event Message		Event Definition	Recommended Action
			Press “SILENCE” to silence the audible alarm.
			Observe the One-Line Display. If the input line is
			orange, black, or gray, the battery discharging
			condition is normal.
			If the input line on the One-Line Display is green,
			check the Active Event Window for potential fault
			conditions that could explain why the UPS is on
			battery. An example of this could be “Rectifier
			Fault.”
		The UPS is on battery.	Monitor the UPS during the battery discharge. The
			display shows the discharge curve of the battery.
		The most common reason for going to battery is a
		loss of rectifier input power (power outage).	When the Battery Voltage Line touches the End of
Batt Discharging			Discharge Line, the UPS shuts down.
		This alarm is self-clearing. When the condition is
			Check the bypass line on the One-Line Display. If
		no longer present, the alarm and any control
			the line feeding the Static Bypass Switch (BPSS) is
		activity tied to the alarm reverts to normal.
			green, the unit can be transferred to bypass by
			pressing “Transfer,” “Bypass” to transfer the load to
			the bypass source. Note that transferring to bypass
			could expose the load to an outage if the bypass
			source fails.
			If the battery is discharging because of a fault such
			as “Rectifier Fault” in the Active Event Window
			rather than an actual power outage, transfer to
			bypass if available, and contact your factory-
			authorized service provider.
		The batteries are being equalized.
		Battery equalization stops automatically based on	In normal operation, no user response is required.
		the Equalize Time Setting.	Equalize charge can be terminated at any time by
Batt Equalizing		This status message is self-clearing. When the
			pressing “Battery Management,” “Manual Battery
		condition is no longer present, the message and
			Equalize,” “Stop.”
		any control activity tied to the status event reverts
		to normal.
			Press “SILENCE” to silence the audible alarm.
		Detected battery ground current exceeds the trip	Are any Battery Circuit Breakers tripped?
			Perform a visual inspection of the batteries in the
		setting.
			tripped string(s). Look for signs of leaking battery
		A possible symptom that could cause this alarm is
			acid or excessively corroded battery terminals.
		a leaking battery.	If there are no visible signs of defective batteries,
		This alarm has a higher detection setpoint than
			press “RESET” to try and clear the alarm.
Batt Ground Fault		“Battery Ground Fault Current Warning,” and if
			Close any open breakers one at a time, pressing
		present, means that the Battery Ground Fault
			“RESET” after each one to see which string is
		Current is excessive.
			causing the alarm. The string reporting the fault,
		This alarm could cause Battery Breakers to trip if
			when online, will not allow the alarm to reset.
		the “Battery Ground Fault Trip Enable” setting is
			Once the location is identified, or if the battery string
		enabled.
			tests are inconclusive, contact your factory-
			authorized service provider.

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