Emerson 480V Inverter STS Fail, Condition is removed, Error can also leads to the alarm

Page 103

UPS Status Messages

Table 36 UPS status messages

Event Message

Description / Suggested Action (if any)

 

 

Inverter STS Fail

At least one of the static switches of inverter side is open or short circuit. This fault is locked until

power off. Contact Liebert Global Services for assistance at 800-543-2378 for assistance.

 

 

At least one of the static switches of bypass side is open or short-circuited. This fault is locked

Bypass STS Fail

until power off.

 

Contact Liebert Global Services at 800-543-2378 for assistance.

Output Fuse Fail

At least one of the output fuses is open. Contact Liebert Global Services at 800-543-2378 for

assistance.

 

Control Power 2 Fail

Control Power 2 is abnormal or lost. Contact Liebert Global Services at 800-543-2378 for

assistance.

 

 

The UPS is overloaded when the load arises above 105% nominal rating.

 

The alarm automatically resets once the overload condition is removed.

 

Confirm that the alarm is true by checking the load percent indicated on the LCD panel to

Unit Overload

determine which phase is being overloaded.

If the alarm is true, measure the actual output current to verify that the indications are valid.

 

 

Disconnect unnecessary load. In a parallel system, a severe load sharing error can also lead to

 

the alarm.

 

Contact Liebert Global Services at 800-543-2378 for assistance.

 

The UPS parallel system is overloaded when the total load arises above 105% nominal rating

 

for the set basic number of UPS units. The alarm resets automatically once the overload

 

condition is removed.

System Overload

Confirm that the alarm is true by checking the system load percent indicated on the LCD panel

to determine which phase is being overloaded.

 

 

If the alarm is true, measure the actual output current to verify that the indications are valid.

 

Disconnect unnecessary load and ensure the safety. In a parallel system, a severe load sharing

 

error can also leads to the alarm.

 

The UPS is overloaded and the overload times out.

 

Note 1: The highest loaded phase will indicate overload timing-out first.

 

Note 2: When the timer is active then alarm “unit overload” should also be active as the load is

 

above nominal.

 

Note 3: When the timer has expired, the inverter Static Switch is opened and the load

Unit Overload Timeout

transferred to bypass. The inverter shutdown and will restart after 1 seconds.

 

Note 4: If the load decreases lower than 95% after 5 minutes, the system will transfer back to

 

inverter mode.

 

Confirm that the alarm is genuine by checking the load percent indicated on the LCD. If an

 

overload is indicated then check the load, and investigate any additional load connected prior to

 

the alarm (if applicable).

Inverter Overcurrent

The current of inverter IGBT is over limit. If the fault will not reset, contact Liebert Global

Services at 800-543-2378 for assistance.

 

 

The phase sequence direction of bypass voltage is reversed.

 

Normally, the phase of Phase B lags 120 degrees behind Phase A, and the phase of Phase C

Bypass Phase Reversed

lags 120 degrees behind Phase B.

 

Verify that the phase rotation of the bypass supply presented to the UPS is correct, and rectify it

 

if it is found to be in error. Contact Liebert Global Services at 800-543-2378 for assistance.

Load Impact Transfer

A transfer to bypass occurred due to a large step load. The UPS should recover automatically.

Turn on connected equipment in sequential order to reduce the step loading of the inverter.

 

 

The load is on bypass power due to excessive number of transfers that occurred within the last

Transfer Timeout

hour.

The UPS will recover automatically and will transfer the load back to inverter power within an

 

 

hour.

 

 

Load Sharing Fault

UPS units working within a parallel system are not sharing load current correctly. Contact

Liebert Global Services at 800-543-2378 for assistance.

 

DC Bus Abnormal

Shut off inverter due to abnormal DC bus voltage.

Contact Liebert Global Services at 800-543-2378 for assistance.

 

System Transfer

The whole paralleled UPS system transferred to bypass at the same time. This message will

appear on the UPS which passive transfer to bypass.

 

Parallel Board Fault

Parallel board is not working correctly. Contact Liebert Global Services at 800-543-2378 for

assistance.

 

 

 

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Contents
Liebert NX UPS Page Table of Contents Options UPS SpecificationsOperator Control and Display Panel Pop-Up Windows Operating InstructionsAppendix a UPS Status Messages Specifications and Technical DataTables Page Important Safety Instructions Battery Cabinet Precautions Glossary of Symbols External Inspections InstallationPreliminary Checks Internal InspectionsUPS Location Special Considerations for Parallel Systems Battery LocationConsiderations in Moving the Liebert NX Mechanical ConsiderationsSystem Composition Floor InstallationClearances Cable EntryCabinet arrangement-Liebert NX units and battery cabinets UPS Cable Rating Power CablingLug Size and Torque Requirements Cabling Guidelines UPS Input ConfigurationInput and output busbars Cable ConnectionsProtective Devices Safety GroundUPS Rectifier and Bypass Input Supply Dual Input Connections Cabling ProcedureOutput System Connections-Ensure Correct Phase Rotation Common Input ConnectionsMonitor Board Features Frequency Converter ModeControl Cables Dry Contacts Input dry contacts at Maintenance Bypass Cabinet InterfaceMaintenance bypass cabinet interface Input Dry ContactsBCB control interface BCB Control InterfaceOutput dry contact relays Inverter mode relay centerMain input fault relay center Output Dry ContactsEPO input contact relays EPO Input-OptionalIndicates Pin Introduction SafetyBattery Cabinets External Battery Cabinet InstallationInstallation Considerations Connecting the BatteriesInsulated Post Tray Handle For Cabling Non-Standard Batteries Connecting the Battery Cabinet to the UPSBCB Shunt Trip Alber Monitoring System-Optional This power must be UPS protectedLBS Cable LBS Cable and SettingsLoad Bus Synchronization Performance RequirementsFeatures of Parallel System Configuring Parallel System OperationGeneral Operating Principles Redundancy Paralleling Installing Parallel SystemOperation Modes Summary Preliminary Checks Cabinet InstallationPower Cables Conditions for Parallel SystemAuxiliary Dry Contact Cables InterconnectingCables QByp Q1Ext Q2ExtTo Load Normally Closed EPO Normally Open EPOConformity and Standards UPS Mechanical CharacteristicsEnvironmental characteristics UPS mechanical characteristicsUPS terminal UPS Electrical CharacteristicsBattery Manufacturer Models Supplied Rectifier input powerLiebert approved replacement batteries Rated Power kVA 100 120Inverter Output DC Intermediate CircuitBypass Input Left Side GND Left Side View Front View Max. Door Swing U3819205 Ext Batt530628 Pg , Rev Battery Breaker External Battery CabinetAuxiliary Contacts Top Top Front Right Side System Front RearRear FRONTOutput Run From Conductors AC Output Ph A, B, C System InputPh A, B, C UPS Inputs Ph A, B, C UPS OutputsPh A, B, C System Outputs Utility UPS #1-UPS #4 Module AC Ph A, B, C UPS InputsGround UPS U3819301 Isometric ViewGeneral Description Single module block diagram dual input configurationBypass Supplies Normal ModeBattery Mode Bypass ModeParallel Redundancy Mode System Expansion Maintenance ModeDisplay Panel Layout Operator Control PanelDetailed view of control panel Mimic indicators Control buttons Navigation keysMimic display status indicators Mimic Display IndicatorsControl buttons Control ButtonsLCD Overview Audible BuzzerDescription of items in UPS system window Navigation KeysUPS System Information Icons for navigation keysLCD Menus and Data Items Input Descriptions of UPS menus and data window itemsMenu Type Item Type Explanation MainsLanguage Selection Start/stop BatteryTests Set date and time Current Date and TimeCurrent status and history log records UPS Status MessagesTypes of LCD Screens Default ScreenOpening Display Screen Saver Window UPS Help ScreenPop-Up Windows UPS operating modes Liebert NX Operating ModesCircuit breakers Circuit BreakersIndicator State Startup ProcedureUPS Startup Switch from Bypass Mode to Normal Mode Switch from Normal Mode to Bypass ModeMaintenance Bypass Procedure and Powering Down the UPS Emergency Shutdown With EPO Auto RestartBattery End-of-Discharge EOD Protection Battery ProtectionMulti-Module System Procedures Battery Undervoltage Pre-WarningTie breaker LED Function Status Inserting One Module into a Multi-Module SystemCommissioning a Parallel System Shutdown Procedure-Complete UPS and Load ShutdownParallel System Start Up Liebert IntelliSlot Communication Power OutputCommunication and Other User Terminals Analog Input InterfaceBaud Rates See 10.1.5 ConfiguringLiebert NX communication options CommentsConfiguring Baud Rates Liebert IntelliSlot Web card display Pin Function Operation Relay Card pin configurationRelay card jumper configuration Relay CardAssignment MultiPort 4 CardPin Description LBS Mode-Load Bus Synchronization Remote Alarm MonitorReplacing Dust Filters Cable Lengths Floor to Connection Point Inside UPS Torque specificationsBattery torque rating Lug Size and Torque RequirementsParallel system current table Distance to connection points on the Liebert NX UPSCable size and tightening torques External cabinet dimensions, including side panelsLead/Lag ratings 250 10 N*m Estimated battery run time, minutes Battery Run TimesUPS status messages Services at 800-543-2378 for assistanceEvent Message Description / Suggested Action if any Software according to the customer’s agreement High ambient air temperatureBypass voltage is beyond the normal range Bypass voltage exceeds the limitCondition is removed Error can also leads to the alarmAlarm if applicable Inverter STS FailEPO Emergency Power OffUPS status messages UPS Status Messages Page That Ne tIti Ti n
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