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

Page 50

 

 

 

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.

 

 

 

 

44

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Contents Liebert NXL Battery Cabinet Precautions Contacting Liebert for SupportTable of Contents Specifications Figures Page Important Safety Instructions Modes of Operation Normal ModeGeneral Description Maintenance Bypass Bypass ModeBattery Mode OptionsIntroduction Features Main component locationsMimic display Monitor/mimic display example Normal power flow Monitor/mimic display example Utility failMonitor/mimic display example Load on bypass, UPS On Touchscreen Navigation Main Display Screen Menu treeConfigurations Menu Rating Rating ParametersUser Settings System Settings parametersAdjustable Setpoints Adjustable setpoints parametersCell Count Adjustment Startup Menu Event ManagementStatus Reports Menu Shutdown Menu Shutdown menuTransfer/retransfer commands Transfer MenuBattery Management Menu Time remaining displayDisplay summary see Figure Help ResetMetering SilenceOK to Transfer Load on bypass, UPS availableInput Power Failure-Load on Battery Input power fail, load on batteryOff Battery Emergency Module OffManual Procedures Remote Emergency Power OffStartup Procedure Startup commands Re-Transfer Procedure Load Transfer ProceduresTransfer Procedure Maintenance Bypass Load TransfersMaintenance Bypass Load Transfers-If Load is on UPS Bypass System Shutdown Procedure Shutdown ProceduresUPS Shutdown Procedure Automatic OperationsAutomatic Transfers to Bypass Overload Condition Current-versus-time curves of overload capacityAutomatic Transfers to Bypass, UPS System Faults Automatic Retransfers to UPSSafety Precautions Liebert Services Routine MaintenanceRecord Log Air FiltersLimited Life Components Battery MaintenanceUPS component service life Component Expected Life ReplaceBattery Safety Precautions Battery retorque values Matching Battery Cabinets-OptionalBattery voltage, nominal and float Rack-Mounted Batteries Torque specifications, unless otherwise labeledDetecting Trouble Torque RequirementsCorrective Actions Reporting a ProblemUpstream Feeder Circuit Breaker Setting Inspections Parameter Specification Battery OperationEnvironmental specifications Environmental ConditionsLiebert NXL Model Size 250 Electrical specificationsBattery & DC Parameters Input ParametersPhysical Parameters & Standards, in mm Liebert NXL Model SizeSystem Parameter Specifications Liebert NXL alarm and status messages Event Message Event Definition Recommended ActionObserve the One-Line Display. If the input line is Observe the One-Line Display. To identify which Do not Attempt to Close CB3 Until Reset Displayed on the Module Output Meter. If UPS controls monitor the DC Bus positive Resolve the issue that precipitated the EPO Check the One-Line Display for system status UPS, to transfer back to Inverter If this alarm occurs on an operational unit, it Attempt to manually close the disconnect by Module Output Meter. If the load is less than Output Power Factor. If the displayed power factor Until a service visit has been made and action taken When manual transfers are enabled Under normal conditions, no user action is required Observe the One-Line Display and the Active Event If the command to terminate Regeneration Mode If the alarm cannot be reset, or if the alarm condition UPS Alarm and Status Messages UPS Alarm and Status Messages Page Ti n Ne tIti That
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