Emerson 250-400kVA manual Reset

			UPS Alarm and Status Messages
Table 7	Liebert NXL alarm and status messages (continued)
Event Message		Event Definition	Recommended Action
		This is a summary event that informs the user that	Press “SILENCE” to silence the audible alarm.
		a circuit breaker that was either signaled to close	Check the One-Line Display and the Active Event
			Window to determine which breaker or switch is
		or was manually closed failed to report a closed
			open.
Breaker Close Fail		status.
			If the open breaker cannot be reset or closed, or if
		The Breaker Close Fail event indicates a
			all breakers are closed but the One-Line Display
		mismatch between the expected state of a
			does not agree, or the alarm cannot be cleared,
		breaker and the reported state of the breaker.
			contact your factory-authorized service provider.
			Press “SILENCE” to silence the audible alarm.
		This is a summary event that informs the user a	Check the One-Line Display and the Active Event
			Window to determine which breaker or switch that
		circuit breaker that was either signaled to open or
			should be open is still closed.
		was manually opened failed to report an open	If a breaker that should be open shows closed, or if
Breaker Open Fail		status.
			the breaker in question actually is open but the fault
		The Breaker Open Fail event indicates a
			is still present, attempt to clear the fault by pressing
		mismatch between the expected state of a
			“RESET.”
		breaker and the reported state of the breaker.
			If the event does not reset, contact your factory-
			authorized service provider.
			Press “SILENCE” to silence the audible alarm.
			Observe the calculated load percentage on A phase
			displayed on the Module Output Meter. If the A
		The critical load is greater than 110% while the	phase steady state load percentage exceeds 110%,
			perform the following:
		UPS is on bypass. The controls may shut the unit
			If Maintenance Bypass is available, follow Standard
		down if the overload condition does not clear	Operating Procedures to transfer the load to
		within the allotted time. Allotted time is variable,
			Maintenance Bypass.
		and is inversely proportional to the amplitude of
Byp Overload			If Maintenance Bypass is not available but the
		the overload, i.e., the greater the amplitude of the
Ph A			system has an Internal Bypass Breaker (CB3 on the
		overload, the less time the unit continues to	One-Line Display), close CB3. Note that depending
		support the load.
			on the severity of the overload, the possibility exists
		This alarm is self-clearing. When the condition is
			that CB3 could trip if the overload exceeds the
		no longer present, the alarm and any control
			breaker rating.
		activity tied to the alarm reverts to normal.
			Investigate the overload condition.
			If the Module Output Meter does not indicate an
			overload condition, perform the previous steps and
			contact your factory-authorized service provider.
			Press “SILENCE” to silence the audible alarm.
			Observe the calculated load percentage on B phase
			displayed on the Module Output Meter. If the B
		The critical load is greater than 110% while the	phase steady state load percentage exceeds 110%,
			perform the following:
		UPS is on bypass. The controls may shut the unit
		down if the overload condition does not clear	If Maintenance Bypass is available, follow Standard
			Operating Procedures to transfer the load to
		within the allotted time. Allotted time is variable,
			Maintenance Bypass.
		and is inversely proportional to the amplitude of
Byp Overload			If Maintenance Bypass is not available but the
		the overload, i.e., the greater the amplitude of the
Ph B			system has an Internal Bypass Breaker (CB3 on the
		overload, the less time the unit continues to	One-Line Display), close CB3. Note that depending
		support the load.
			on the severity of the overload, the possibility exists
		This alarm is self-clearing. When the condition is
			that CB3 could trip if the overload exceeds the
		no longer present, the alarm and any control
			breaker rating.
		activity tied to the alarm reverts to normal
			Investigate the overload condition.
			If the Module Output Meter does not indicate an
			overload condition, perform the previous steps and
			contact your factory-authorized service provider.

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