Liebert 30-130kVA manual Detecting Trouble, Reporting a Problem, Corrective Actions

Page 108

Maintenance

4.3Detecting Trouble

It is important that the operator check the instrument readings if abnormal equipment performance is suspected. Any metered value that differs appreciably from normal could mean an impending mal- function, and should be investigated.

Items to check on the various UPS display screens include:

1.Output voltage of all phases should be within 2% of normal voltage. Output currents on each phase should not normally differ by more than 20%. If a greater difference is noted, the load is unbalanced and corrective action should be taken to redistribute the load, if possible.

2.If the UPS has not operated on battery power during the last 10 hours, the batteries should require little charging current. Battery mimic should indicate normal DC voltage with relatively little battery charge current.

3.Input current on each phase should be within 10% of the average input current. Alarm messages indicate malfunction or impending malfunction. A daily check of the Operator Control Panel will help to provide an early detection of problems. Refer to Table 7 to interpret alarm messages.

4.Tracing a problem to a particular section is facilitated by alarm messages and the metered parameter indications. These are stored in the Status Reports and can be displayed at the Operator Control Panel or at an optional terminal.

NOTE

If the UPS system has a blown fuse, the cause should be determined before you replace the fuse. Contact Liebert Global Services.

4.4Reporting a Problem

If a problem occurs within the UPS, review all alarm messages along with other pertinent data. This information should be given via telephone to the Liebert Global Service dispatcher. This information can also be automatically sent by telephone modem. Call 1-800 Liebert to report a problem or to request assistance.

4.5Corrective Actions

For each alarm message on the Operator Control Panel and the Remote Alarm Status Panel, you can find the recommended corrective action in 3.4.2 - Alarms.

4.6Recommended Test Equipment

A list of recommended test equipment and tools required to maintain, troubleshoot, and repair the UPS module is given in Table 4-2. You may substitute instruments of equivalent range and accuracy. All instruments should be calibrated and be within the current calibration cycle. Calibration data for the instruments should be maintained in equipment-history files and the instruments labeled for audit and verification.

Table 12 Recommended test equipment and tools

Qty

Test Equipment

Manufacturer

Model or Type

 

 

 

 

1

Oscilloscope

Tektronix, H-P or Fluke

DC to 50 MHz

 

 

 

 

2

Voltage Probes

Tektronix, H-P or Fluke

10X, with 10 ft. Cable

 

 

 

 

2

Voltage Probes

Tektronix, H-P or Fluke

100X, with 10 ft. Cable

 

 

 

 

1

Digital Multi-meter

Fluke

8060, with Test Leads

 

 

 

 

1

Tool Kit

N/A

Standard electrical contractor tools

 

 

 

 

100

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Page 107 Page 109
Contents Npower UPS Page Table of Contents Maintenance Communication InterfacesFigures Page Tables Page Important Safety Instructions Overview of Manual System Description Safety Precautions Factory Backup and Service AssistanceReliability VersatilityInput Power Failure Modes Of OperationNormal Load On UPS RechargeMimic Display CHGSYS. Status Operator Controls OptionsBattery System General Component DescriptionUPS Module Detailed Component Descriptions Controls HardwareFirmware Input Power Factor Battery Charging CircuitRectifier/Charger OperationBattery Disconnect Battery Charge Current LimitingBattery Equalize Charge Circuit Operation After End-of-dischargeNonlinear Load Characteristics Unbalanced Load CharacteristicsStatic Bypass Switch Static Switch Backfeed ProtectionTransfer and Retransfer Conditions Operation Operation Operator Control Panel Navigation ButtonsRotary Switch Rotary switchConfiguration User SettingsSecurity Access and Passwords Prev Cancel Save & ExitDisplay Screens and Procedures Menu TreePrimary Screens Secondary ScreensMain Menu Screen Mimic Display ScreenFaults Faults / AlarmsRect DischgMimic Display SYS. StatusDC BUS / Battery Status Input StatusFreq Temps DEG C Inlet AIR Outlet AIR Heat SinksFreq .9 HZ 213 214 Phase Diff Bypass Input StatusOutput Load Status Active Faults and Alarms Faults and AlarmsUser Shutdown EXI TSystem Ratings NextManual Startup Second ScenarioAuto Startup Input Modify Current Limit Target and Ramp Values Modify DC BUS SET Point Target and Ramp ValuesServ Skip AbortSIB External Maintenance Bypass External maintenance bypass switch, dual-input UPSExternal maintenance bypass switch, single-input UPS Multiple Battery Cabinets External Maintenance Bypass Switch ConfigurationsUser Shutdown ShutdownStatus Reports System StatusHistory LOG Clear History Logs Clear Event LOG Status ReportsEvent LOG TotalEvent Log History LOG 02 / 10OUT-V IN-V Load Freq OutputSBS Line Trap SBS Load Input of / UFConfiguration Screens ExitDC BUS Volts Input FrequencyOutput Frequency PrevSystem Settings Cancel Save & ExitSystem Settings Current DateNext PREV. Cancel Save & Exit Current TimeOrder Number TimeEnter Password Single / Dual InputDual Output Transformer Bypass WIND. no10% Passive Filter Settings OptionsActive Filter LBS Generator Auto Restart OptionsPulse Rectifier Battery GND Fault Green Machine Alternate Power Pole FAN noLine Drop Compensation Prev ExitCommunication Options Auto DialNext Exit Pager Support Configuration Pager Enabled Pager Number Pager PINModem Health Check Auto Dial YES Auto Dial OUT PagerPREV. Cancel Next PREV. Cancel 10 % Passive Filter Settings Factory SettingsNext Cancel Alarm Mask LatchingDial FreezeAlarm / Fault Name Alarm / Fault Name Battery Fuse FailAlarm / Fault Name F E Save & Exit CancelCustomer Alarm Interface Auto DialCustomer Alarm Interface Programmable Output Relay Board #Remote LED Board # Relay Assignments STD SET User DefinedSTD SET Prog Relay # UP Down ADD Remove Clear ExitNavigating Protocol Manual TransferBattery Management Battery TestAuto Test Battery Cycle Battery DurationBattery Equalizer MIN MAX WeeksEnabled Disabled AutoManual Stop StartBattery Temp Compensation Charge TemperatureBattery Temperature Compensation Charge Equalize Time PeriodBattery Temp Compensation Battery Cycle MonitorBattery Cycle Monitor Summary Clear BCMClear Summary YES / no Seconds Discharge Cycles SummaryTime Down Battery Time Low Warning BATT. EOD Lower SET Point BATT. EOD Upper SET PointBattery Supplement BATT. Time LOW WarningAuto Restart Alarm Notifications Auto Restart Trigger ConditionSystem Status System Status MonitoringSystem Status Sign OFF Date 10/30/01Next Prev Save & Exit Sign OFF Date 10/30/02Accumulated Backup Hours Accumulated Operating Hours on UPSAccumulated Operating Hours on Bypass Accumulated # of Brown OutsFaults, Alarms, Status FaultsAlarm / Fault Name F E Delay On Battery Input Contact #1UP Down Description L Latching...D DialSummary Alarm Messages Alarms, functions, and corrective actionsContact Liebert Global Service to check Excess load from the UPS and attempt to EPO Maximum heat sink temperature limit This is a summary event based on Battery is discharging. This occurs RMS input current has reached Output kVA or kW or RMS current has With the load on UPS, PhaseB output KVA Condition only causes an alarm, but should Push-button switch located on See 3.3.7 Battery Management All of the alarms before attempting to Communication Interfaces Status1 RS-232 Port Local Reporting Terminal Worldwide ReportingAuto-Dial Requesting Information Dial Out PagerRemote Alarm Status Panel SiteScanSetting Up External Communication Devices Load on BypassOK to Transfer Input Power Failure Load on Battery Momentary OverloadsAutomatic Operations OverloadsAutomatic Transfers to Bypass Automatic Re-transfers to UPSAutomatic Module Off Line Maintenance Routine Maintenance Battery MaintenanceRecord Log Air FiltersBattery Safety Precautions Battery voltage record Torque RequirementsReporting a Problem Detecting TroubleCorrective Actions Recommended Test EquipmentMaintenance 101 Maintenance 102 Page Ne t
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