Liebert 3000 manual Dehumidification troubleshooting, Glycol pump troubleshooting

Page 69

 

 

Troubleshooting

Table 24 Dehumidification troubleshooting

 

 

 

 

 

 

Symptom

Possible Cause

Check or Remedy

 

 

 

 

 

 

Control not calling for

Check monitor status.

 

No dehumidification

dehumidification

 

 

 

Compressor contactor not pulling in

See 6.4.8 - Compressor Functional

 

 

 

Check and Table 23.

 

 

Compressor won't run; fuse blown or

See 6.4.8 - Compressor Functional

 

 

CB tripped

Check and Table 23. Check fuses or

 

 

 

CBs and contacts. Check line voltage

 

Table 25 Glycol pump troubleshooting

 

 

 

 

 

Symptom

Possible Cause

Check or Remedy

 

 

 

 

 

Suddenly stops pumping

Clogged strainer or impeller

Clean out debris.

 

 

 

 

 

Suddenly slow pumping

Clogged impeller, diffuser, or line

Clean out debris and use strainer.

 

 

 

 

 

Excessive leakage around the pump

Worn seal or packing

Replace seal or packing.

 

shaft while operating

 

 

 

Performance poor

Worn impeller or seal

Replace with new impeller or seal.

 

 

 

 

Suction lift too high

Relocate pump closer to supply.

 

 

 

 

 

 

 

 

Motor not up to speed; low voltage

Larger lead wires may be required.

 

 

 

Check for proper line voltage (±10%).

 

 

Worn bearings

Replace pump

 

 

 

 

 

Noisy operation

Worn motor bearings

Replace pump

 

 

 

 

Low discharge head

Throttle discharge-improve suction

 

 

 

 

 

conditions.

 

 

 

 

 

 

Debris lodged in impeller

Remove cover and clean out.

 

 

 

 

 

 

Cavitating pumps

Adjust system pressures.

 

 

 

 

 

Table 26 Infrared humidifier troubleshooting

 

 

 

 

 

Symptom

Possible Cause

Check or Remedy

 

 

 

 

 

No humidification

Humidifier pan not filling

Check water supply.

 

 

 

 

 

Check fill valve operation

 

 

 

 

 

 

 

 

 

 

Check drain stand pipe adjustment

 

 

 

 

 

 

 

Check for clogged waterline

 

 

 

 

 

 

Control not calling for humidity

Check monitor status

 

 

 

 

 

 

Humidity contact not pulling in

Check visually. If contact is made,

 

 

 

check line voltage after contactor and

 

 

 

fuses or CBs.

 

 

 

Check for open humidifier safety stat.

 

 

 

Jumper between terminals P35-6 and

 

 

 

P35-15. If contactor pulls in, replace

 

 

 

safety. Remove jumper.

 

 

Humidifier bulb burned out

Replace bulb. Loosen lead on old

 

 

 

bulb. Trim excess lead length on new

 

 

 

bulb to avoid shorts.

 

61

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Contents Liebert Challenger Page Table of Contents Run Diagnostics Component Operation and Maintenance Alarm DescriptionsHumidifier Figures Page Compressorized Systems System DescriptionsGlycool Chilled Glycol Cooling Systems Chilled Water SystemsStart-Up Procedure Advanced microprocessor control panel BasicsAdvanced microprocessor a control for Challenger Status/Alarm Data Status DisplayMain Menu MENU/ESC Default setpoints and ranges Setpoints/SetupRun Hours Log Analog SensorsSetup Operation Setup SystemShow DIP Switches Select OptionsCalibrate Sensors Alarm default time delays Setup AlarmsDefault Time Alarm Delay secondsHumidity HUM Control Method Standard Custom Alarm MessagesAnalog Setup Set Status DisplayCalibrate Actuator Show Inputs Run DiagnosticsTest Outputs Test Control BoardDate and Time Change PasswordsControl Circuit Board LCD Display ContrastNon-Volatile Memory DIP SwitchesControl Outputs Control output LEDsOperation with Advanced Microprocessor with Graphics Control Advanced microprocessor with graphics control menu See 3.7.7 Set Status Display View/Set AlarmsSetup Alarms Setup Custom Alarms Setup Water Detect Floor PlanView Water Detect Floor Plan for Optional LTM1000/LT750 Cold Start Delay System SetupOperating Status View/Set Control SetpointsDefault Settings and Ranges Auto Restart DelayIR Flush Overfill infrared humidifiers only Chilled Water/Hot Water/Econ-O-Coil FlushSelect Control Algorithm Chilled Water and SCR Reheats only Calibrate Valve ActuatorSelect Humidity Sensing Mode Run DiagnosticsShow Inputs Setting options Plot GraphsModify Plot Scales View Run Hours Log Analog/Digital InputsView 24 Hour Run Time History View Total Run HoursLCD Contrast Nonvolatile Memory Cooling/Heating Required, in Percent % Temperature ControlResponse to Control Types Proportional Control PID Control Chilled Water or SCR Reheats onlyDual Cooling Source Glycool CoolingChilled Water Cooling Cooling/dehumidification load status responseHeating Operation Electric Reheat Humidity ControlHot Water Reheat SCR Electric Reheat Requires Special Control SoftwareControl Types Humidification Operation System ActivationProportional Control Time between peaks x 5% Additional Features Load Control FeaturesConnecting the Analog Sensors Short Cycle ControlFault Installation-LT750 DIP Switch SettingsWater Detection Display LT750 Environmental UnitSetup Physical ConnectionsCalibration Liebert Monitoring Devices and Software CommunicationsChange Filter Standard AlarmsHigh Temperature Custom AlarmsCompressor Overload High Head PressureHumidifier Problem Infrared Humidifiers High Temperature and Low Temperature SimultaneouslyLoss of Power Low TemperatureOptional/Custom Alarms System Testing Smoke Detector FirestatWater Detection Sensor Liebert unit Recommended Liquitect location Floor drainFilters Zone leak detection kit installation scenariosRemote Shutdown Distance From UnitFan Impellers and Bearings Blower PackageBelt Air DistributionSuction Pressure Refrigeration SystemDischarge Pressure SuperheatAdjustment Thermostatic Expansion Valve OperationHot Gas Bypass Valve Operation Air Cooled Condenser Outdoor fan/condenser configurationWater/Glycol Cooled Condensers Coaxial Condenser Regulating ValveValve spring guide Adjusting Collar Nut Glycol Solution MaintenanceCompressor Replacement Compressor Functional CheckMechanical Failure Electrical Failure Compressor Replacement ProcedureHumidifier Cleaning the PanInfrared Humidifier Removing the PanAutoflush Operation Autoflush Infrared Humidifier Cleaning SystemAutoflush Controls Steam Generating HumidifierControls OperationHumidifier canister part numbers Replacing the CanisterPart Capacity Number Voltage Lbs/hr kg/hr 200-460Drain Tempering Feature Circuit Board AdjustmentsBlower troubleshooting Chilled water troubleshootingSymptom Possible Cause Check or Remedy Compressor and refrigeration system troubleshooting Compressor and refrigeration system troubleshooting Glycol pump troubleshooting Dehumidification troubleshootingInfrared humidifier troubleshooting See 6.4.8 Compressor Functional Check and TableSteam generating humidifier troubleshooting Reheat troubleshooting Blower Section Filters Steam Generating HumidifierCompressor Air Cooled Condenser if applicableWater/Glycol Condenser if applicable FiltersGlycol Pump Electrical PanelSemiannual Maintenance Inspection Checklist Page Iti Ne tTi n That
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3000 specifications

The Liebert 3000 is a cutting-edge power protection solution designed to provide reliable and efficient backup power for critical applications. This uninterruptible power supply (UPS) system is engineered to safeguard sensitive electronic equipment from power disturbances, ensuring uninterrupted operations in data centers, telecommunications, and industrial environments.

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