Emerson 250-400kVA manual Do not Attempt to Close CB3 Until

			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.
			To attempt to identify which sensor is reporting an
			inconsistent temperature or an overheating battery,
			observe the temperature reading inside the Battery
		With more than one Battery Temperature Sensor	Box on the One-Line Display. Cycle through all
Batt Temp		installed, the controls are detecting too great a	connected batteries by pressing the Battery Box.
Imbalance		temperature difference between the individual	If it appears this alarm is due to a specific cabinet or
		sensors.	battery string being warmer than the others, verify
			through investigation whether the string is actually
			getting warmer than the others, or if the sensor
			appears to be reporting incorrectly.
			Contact your factory-authorized service provider.
		An Automatic or Manual Battery Test Failed. The
		battery “Test Duration” is adjustable. The battery
		test fail criteria were met before the end of the	Press “SILENCE” to silence the audible alarm.
Batt Test Failed		timed battery test.
			Contact your factory-authorized service provider.
		For example, there must be at least 25% load to
		run the battery test. If, during the battery test the
		load drops below 25%, the test fails.
			Check the Active Event Window and investigate
			other events to further analyze.
		The conditions required to perform an automatic	If there are other active events in the Active Event
		battery test are not met.	Window, press “RESET” to clear the events.
		When the battery test is inhibited, the system	Check the One-Line display to verify the UPS is
		delays the test for 7 days. If conditions are	online.
Batt Test Inhibit		satisfied after 7 days, the UPS performs the	Check the Module Output Meter and verify the kW
		battery test at that time.	load is between 20%-100%.
		Examples of conditions required to run the	Press the Battery Box on the One-Line Display and
		automatic battery test are at least 20% load, all	verify all battery strings show at least 90% charged
		battery breakers closed, normal operation, etc.	and all battery breakers are closed.
			If the issue cannot be resolved, contact your
			factory-authorized service provider.
Batt Test Passed		The Battery Test passed.	None.
		The Backfeed Breaker is open.
		The Backfeed Breaker feeds the Static Bypass
		Switch (BPSS). The physical location of the
		breaker depends on unit configuration. It may be
		located in the UPS, or it may be located external	This status message is informational. If the breaker
		to the UPS.
			was not opened intentionally, or if the breaker is
BFB Open		The purpose of the Backfeed Breaker is to
			actually closed and this message is active, contact
		prevent leakage current through the bypass circuit
		during an outage.	your factory-authorized service provider.
		This status message is self-clearing. When the
		condition is no longer present, the message and
		any control activity tied to the status event reverts
		to normal.
			Press “SILENCE” to silence the audible alarm.
		The Bypass Static Switch (BPSS) was turned off	If CB3 is available (visible if present on the One-
		due to an extended overload.	Line Display), close it to restore power to the load.
		While the BPSS can sustain an overload greater	DO NOT ATTEMPT TO CLOSE CB3 UNTIL THE
		than the Inverter and for a longer period of time,	SOURCE OF THE OVERLOAD IS IDENTIFIED
BPSS Ovld		there are still limits on the amplitude and duration	AND ISOLATED.
Exceeded		of overload that the BPSS can handle. This alarm	Once the overload source is isolated, restart the
		indicates the overload was greater in amplitude	UPS by pressing “Startup,” “Manual Start” and
		and time than the BPSS can handle, and	follow the prompts.
		therefore shut off to prevent damage to the	If the overload condition does not clear, or the
		equipment.	overload is cleared but the UPS does not restart,
			contact your factory-authorized service provider.
BPSS Unable		A problem has been detected in the Bypass Static	Press “SILENCE” to silence the audible alarm.
			Press “RESET” to attempt to clear the fault.
		Switch.	Contact your factory-authorized service provider.

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