Liebert XDP user manual Alarm Descriptions and Solutions

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Alarm Descriptions and Solutions

5.0ALARM DESCRIPTIONS AND SOLUTIONS

5.1Alarm Descriptions

NOTE

Alarms must be acknowledged before they can be reset. To acknowledge or silence an alarm, press the ALARM SILENCE / ? key.

LOSS OF FLOW P1—Activated when Pump 1 is commanded to run and the differential pres- sure switch does not sense differential pressure (set at 6 psi; 41kPa; 0.41 bars). After attempting to start Pump 1 for 120 seconds (including time delays), the Liebert XDP will automatically switch to the other pump to establish flow.

LOSS OF FLOW P2—Activated when Pump 2 is commanded to run and the differential pres- sure switch does not sense differential pressure (set at 6 psi; 41kPa; 0.41 bars). After attempting to start Pump 2 for 120 seconds (including time delays), the Liebert XDP will automatically switch to the other pump to establish flow.

SHORT CYCLE—Activated when the Liebert XDP is trying to establish flow (differential pres- sure), and it is unable to do it. The Liebert XDP will attempt to establish flow for 4 minutes on each pump, for a total of 8 minutes. If this “cycling” occurs within 30 minutes and the Liebert XDP still does not establish flow, a SHORT CYCLE alarm will be present. This alarm will shut down the Liebert XDP. Main power (disconnect switch) must be turned Off, then back On to clear this alarm. The cycling time for the SHORT CYCLE alarm can be adjusted from the default of 30 minutes; the range is from 10 minutes to 60 minutes.

CONDENSATION!—Activated when water is detected at the Liebert XD cooling module (24VAC is applied to the condensation input on the control). When this alarm is active, the control will raise its refrigerant control point by 4°F (-16°C). Alarm will reset when the 24VAC signal ends or main power is removed.

VALVE FAILURE—Activated when the chilled water control valve has been commanded by the control to open or close and no change is detected from the valve-position signal. The control will close the valve and then try to control the control valve based on its travel time. Main power (dis- connect switch) must be turned Off, then back On to clear this alarm.

CUSTOMER ALRM—Activated when 24VAC signal is applied to the customer alarm input on the control board. Alarm will reset when the 24VAC signal is taken away.

HIGH CW TEMP—Activated when entering chilled water temperature exceeds the user speci- fied setpoint. The alarm will reset itself when the entering chilled water temperature drops below the setpoint.

FAILED CW SENSOR—Activated when the control stops receiving a signal from the entering chilled water temperature sensor. The alarm will reset itself when the temperature sensor signal is re-established.

HIGH REMOTE TEMP & HIGH LOCAL TEMP—Activated when the remote or local temper- ature exceeds the user specified setpoint. The alarm will reset itself when the room temperature drops below the setpoint.

LOW REMOTE TEMP & LOW LOCAL TEMP—Activated when the remote or local tempera- ture is below the user-specified setpoint. The alarm will reset itself when the room temperature raises above the setpoint.

REMOTE SENS PROB—Activated when no signal is present from the remote temperature or humidity sensors. Alarm will reset when the temperature and humidity signals are re-estab- lished.

LOCAL SENS PROB—Activated when no signal is present from the local temperature or humidity sensors or when communication with the display is lost. The alarm will reset when the temperature and humidity signals are re-established.

HIGH REFRIG TEMP—Activated when the refrigerant temperature exceeds the user-specified setpoint. The alarm will reset itself when the refrigerant temperature drops below the setpoint.

LOW REFRIG TEMP—Activated when the refrigerant temperature drops 1.5°F (1°C) below the refrigerant temperature control point. The alarm will reset itself if the refrigerant temperature rises before the control shuts down because of low refrigerant temperature.

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Contents Liebert XDP Fluorinated Greenhouse Gas Requirements-European Union General Safety GuidelinesExample XDP160A Pumping Place holder Revision Unit Redundancy Level LiebertTable of Contents Alarm Descriptions and Solutions SpecificationsFigures Page Product Description General Product InformationEquipment Inspection Product/System DescriptionHandling With Skid Equipment HandlingRemoval from Skid Removing pallet boards for piano jack insertion Liebert XDP strapped to piano jackRemoving Piano Jacks Slide this runner away From the Liebert XDPMechanical Considerations Liebert XDP dimensionsPositioning the Liebert XDP Unit piping outlet connection sizes, inches, OD Cu Model Pipe Connection Point 50/60 HzConnecting High-Voltage Cables Electrical Information High Voltage ConnectionsElectrical enclosure knockout locations for field wiring Extra Low Voltage ELV Connections High voltage connections-50HzField Connections-All Units Field Connections-Optional for All UnitsPiping European Union Fluorinated Greenhouse Gas RequirementsConnection Sizes Recommended Pipe SizeBypass Flow Controller Piping Installation MethodLiebert XDP Interconnection with Liebert XD Cooling Modules Bypass flow controllers for a Liebert XDP-based systemBypass flow controller details, dimensions Bypass flow controller arrangementPiping Mains Piping Installation MethodPiping Details-Shut-Off/Isolation Valves Evacuation and Leak CheckChecklist for Proper Installation Liebert XDP pump light indicator-208V and 400V units Checklist for Liebert XDP StartupIndicator Lights Description Green Red Filling the Pumped Circuit-R-134a System R-134a liquid levelReturn Line Diameter 5/8 System refrigerant charge for the supply and return mainsReturn Line Diameter Worksheet to calculate refrigerant charge Calculating Refrigerant Charge-ExampleCalculating refrigerant charge-example Total 293Display Feature OverviewMicroprocessor Control User interface keypad functionsControls Feature OverviewViewing or Changing Settings Main MenuSetpoints Active AlarmsAlarm History MIN Temp SPDegrees Setup OperationRestart Time Delay Pump Start TDPump OFF TD Liebert XDP DIP switches and factory settingsPump Wait TD Lead PumpChange Password-SETPT Password Password Security-SETPT Password and Service PasswordValve Time Alarm Time Delay Change Password-SERVICE PasswordAlarm Enable COM Alarm EnableDiagnostics Custom AlarmsCustom Text Alarm Descriptions Alarm Descriptions and SolutionsAlter Alarm Settings Red and Green Lamp IndicatorsEnable or Disable Alarms System Shutdown Causes Troubleshooting Troubleshooting the XDPMaintenance Fluorinated Greenhouse Gas RequirementsSpecifications Liebert XDP160 specificationsTi n Ne tIti That