Liebert XDP user manual System Shutdown Causes

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Alarm Descriptions and Solutions

5.3.2Increase or Decrease Alarm Time Delays

An alarm time delay is the time that the a condition must exist before the control activates an alarm for that condition. This can be used as a filter to prevent nuisance alarms from transient events.

These alarms may have their time delays changed:

•CUSTOMER—customer alarm

•HIGH CW TEMP—high chilled water temperature alarm

•HI RMT TEMP—high remote temperature alarm

•LO RMT TEMP—low remote temperature alarm

•HI LCL TEMP—high local temperature alarm

•LO LCL TEMP—low local temperature alarm

•LOW REFRIG TEMP—low refrigerant temperature alarm

To view the time delay for an alarm:

1.Press the MENU key.

2.Use the Up and Down arrow keys to move to the ALARM TIME DELAY menu. Press the ENTER key to enter into the menu. Use the Up and Down arrow keys to move through the menu and view the alarm time delays.

To change the time delay for an alarm:

1.Press the ENTER key. (The control will ask for a service password if passwords are enabled. Use the Up and Down arrow keys and ENTER key to enter the three-digit password when prompted.)

2.Press the ENTER key again on the alarm to select the alarm to be changed.

3.Use the Up and Down arrow keys to change the alarm time delay.

4.Press the ENTER key to record the change.

5.Press the ESC key two to three times to return to the main display.

5.4System Shutdown Causes

Unit Is Off By Refrig Sens Fail

The control has lost its signal from the refrigerant temperature sensor. The control has no way of controlling the refrigerant temperature, so the unit is shut off. Main power (disconnect switch) must be turned Off, then back On to clear this alarm.

Unit Is Off By High CW Temp

The entering chilled water temperature is too high to keep the refrigerant pump(s) running nor- mally. If there is a HIGH CW TEMP alarm and the refrigerant pump loses flow (differential pres- sure), the Liebert XDP will immediately attempt to restart the pumps and re-establish flow. If flow is still not established, then the Liebert XDP will go into a pre-chill mode. The Liebert XDP can attempt to start again only if the entering chilled water temperature drops below the HIGH CW TEMP setpoint.

Unit Is Off By Pump Short Cycle

The control was unable to get a pump started upon startup or after a loss of differential pressure. The control looks at the SHORT CYCLE time delay. If it cannot establish differential pressure within that amount of time, the unit is shut down. This time is adjustable through the SHORT CYCLE alarm time delay. Main power (disconnect switch) must be turned Off, then back On to clear this alarm.

Unit Is Off By Low Refrig Temp

The control was unable to raise the refrigerant temperature to the calculated refrigerant temper- ature control point. The unit is shut down because if the control cannot raise the refrigerant tem- perature to the calculated refrigerant temperature control point, water may condense on the refrigerant piping and receiving coils. Main power (disconnect switch) must be turned Off, then back On to clear this alarm.

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Contents Liebert XDP General Safety Guidelines Example XDP160AFluorinated Greenhouse Gas Requirements-European Union Pumping Place holder Revision Unit Redundancy Level LiebertTable of Contents Alarm Descriptions and Solutions SpecificationsFigures Page General Product Information Equipment InspectionProduct Description Product/System DescriptionEquipment Handling Handling With SkidRemoval from Skid Removing pallet boards for piano jack insertion Liebert XDP strapped to piano jackRemoving Piano Jacks Slide this runner away From the Liebert XDPLiebert XDP dimensions Mechanical ConsiderationsPositioning 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 UnitsEuropean Union Fluorinated Greenhouse Gas Requirements Connection SizesPiping Recommended Pipe SizePiping Installation Method Liebert XDP Interconnection with Liebert XD Cooling ModulesBypass Flow Controller Bypass flow controllers for a Liebert XDP-based systemBypass flow controller details, dimensions Bypass flow controller arrangementPiping Installation Method Piping Details-Shut-Off/Isolation ValvesPiping Mains Evacuation and Leak CheckChecklist for Proper Installation Checklist for Liebert XDP Startup Liebert XDP pump light indicator-208V and 400V unitsIndicator Lights Description Green Red Filling the Pumped Circuit-R-134a System R-134a liquid levelSystem refrigerant charge for the supply and return mains Return Line Diameter 5/8Return Line Diameter Calculating Refrigerant Charge-Example Calculating refrigerant charge-exampleWorksheet to calculate refrigerant charge Total 293Feature Overview Microprocessor ControlDisplay User interface keypad functionsFeature Overview Viewing or Changing SettingsControls Main MenuActive Alarms Alarm HistorySetpoints MIN Temp SPSetup Operation Restart Time DelayDegrees Pump Start TDLiebert XDP DIP switches and factory settings Pump Wait TDPump OFF TD Lead PumpPassword Security-SETPT Password and Service Password Change Password-SETPT PasswordValve Time Change Password-SERVICE Password Alarm EnableAlarm Time Delay COM Alarm EnableCustom Alarms DiagnosticsCustom Text Alarm Descriptions Alarm Descriptions and SolutionsRed and Green Lamp Indicators Alter Alarm SettingsEnable or Disable Alarms System Shutdown Causes Troubleshooting Troubleshooting the XDPMaintenance Fluorinated Greenhouse Gas RequirementsSpecifications Liebert XDP160 specificationsNe t ItiTi n That
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