Emerson 250-400kVA Manuel D’Utilisation

This menu item permits changing how the Liebert NXL handles Alarms, Faults and Status informa-

tion. Each event can be configured for the following:

• Latch (yes/no)—Event stays active in the event window, even if the fault condition has been 

cleared, until user acknowledges it by pressing the “Reset” button.

• Audible (yes/no)—Will set Audible alarm when event occurs
• Event log (yes/no)—Will display event in Event log when it occurs

See Table 7 for a list of alarms, fault and status messages.

This menu accesses the events records.

• Event Log—Up to 1024 time/date stamped events are captured in the log. The oldest record will 

be overwritten with a new record once the buffer reaches 1024 events.

• System  Status

• Total Operating Hours—Total number hours the UPS has been operational
• Battery Operating Time—A running total of the battery discharge time for all events since 

the log was last cleared

This menu is used to start the UPS and individual devices.
Manual—This will begin the UPS startup. See 2.4 - Manual Procedures for details.
Devices

• Close Trap—This will start the Input filter, if installed
• Close MBD/BCB—If MBD is motor operated, the Close command will Enable and energize the 

motor to close. If MBD is not motorized, the Close command will Enable the breaker UVR. The 

MBD/BCB must be closed manually. If no MBD is selected, do not display this setting.

NOTE
You must press “Save” for changes to take effect.