Emerson VH, DE, VE, DH manual Compressor Replacement, Mechanical Failure, Electrical Failure

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Component Operation and Maintenance, Checks and Adjustments

7.4.9Compressor Replacement

! CAUTION

Avoid touching or contacting the gas and oils with exposed skin. Severe burns will result. Use long rubber gloves in handling contaminated parts.

Infrequently, a fault in the motor insulation may result in a motor burn. However, in a properly installed system, burnouts rarely occur. Of those that do, most are the effects of mechanical or lubri- cation failures, resulting in the burnout as a secondary consequence.

If problems that can cause compressor failures are detected and corrected early, a large percentage can be prevented. Periodic maintenance inspections by alert service personnel on the lookout for abnormal operation can be a major factor in reducing maintenance costs. It is easier and far less costly to take the steps necessary to ensure proper system operation than it is to allow a compressor to fail and require replacement.

When troubleshooting a compressor, check all electrical components for proper operation.

1.Check all fuses and circuit breakers.

2.Check Hi-Lo Pressure switch operation.

3.If a compressor failure has occurred, determine whether it is an electrical or mechanical failure.

Mechanical Failure

A mechanical compressor failure will not be indicated by a burned odor. The motor will attempt to run. If you have determined that a mechanical failure has occurred, the compressor must be replaced.

If a burnout does occur, correct the problem that caused the burnout and clean the system. It is impor- tant to note that successive burnouts of the same system are usually caused by improper cleaning.

Electrical Failure

An electrical failure will be indicated by a distinct pungent odor. If a severe burnout has occurred, the oil will be black and acidic.

In the event that there is an electrical failure and a complete burnout of the refrigeration compressor motor, the proper procedures must be performed in order to clean the system to remove any acids that would cause a future failure.

NOTE

Damage to a replacement compressor caused by improper system cleaning constitutes abuse under the terms of the warranty, and the WARRANTY WILL BE VOID.

There are two kits that can be used with a complete compressor burnout - Sporlan System Cleaner and Alco Dri-Kleener. Follow the manufacturer's procedure.

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Contents Liebert Deluxe System/3 Page Table of Contents Main Menu AG-Run Diagnostics Alarm Descriptions and Solutions Temperature ControlSystem Testing Figures Page System Description IntroductionGlycool Chilled Glycol Cooling Systems Chilled Water SystemsDual Source Cooling Systems Initial START-UP Procedure Additional Considerations for Upflow UnitsBasics Advanced Microprocessor Controls SetupDisplay the Main Menu-AM Control Advanced microprocessor AM control menu Main Menu AM-Status/Alarm Data Active AlarmsAlarm History Log Operating StatusMain Menu AM-Setpoints/Setup Setup System SelectionDefault control and alarm setpoints Analog SensorsSetup functions and factory default values Setup OperationFunction Default Range Show DIP Switches DIP switch settingsSelect Options Calibrate SensorsSetup Alarms Select Control TypeAlarm default time delay Alarm Default Delay secondsAnalog Setup Standard Alarm MessagesHumidity Control Method Run Diagnostics Set Status DisplayCalibrate Actuator Show InputsChange Passwords Main Menu AM-Date and TimeTest Outputs Test Control BoardMain Menu AM-Status Display Load Control FeaturesControl Circuit Board DIP Switches CommunicationsNonvolatile Memory Control OutputsMonitor functions View/Change FunctionsAdvanced Microprocessor with Graphics Control Setup Advanced microprocessor with graphics control panelAdvanced microprocessor with graphics AG control menu Display the Main Menu-AG Control Main Menu AG-View/Set AlarmsMain Menu AG-Status Display Default Time Delay Alarm SecondsSet Up Custom Alarms Standard Custom Alarm MessagesSetup Water Detect Floor Plan Installation-LT750 DIP Switch SettingsMain Menu AG-Operating Status Main Menu AG-Setup SystemMain Menu AG-View/Set Control Setpoints Cold Start Delay Auto Restart DelayDefault Settings and Ranges IR Flush Overfill infrared humidifiers onlyCalibrate Valve Actuator Select Control AlgorithmMain Menu AG-Run Diagnostics Select Humidity Sensing ModeShow Inputs Main Menu AG-Date and Time Dehumidification with Normal or Delayed ReheatMain Menu AG-Plot Graphs Main Menu AG-Analog/Digital Inputs Set Up Digital Inputs Main Menu AG-View Run Hours LogRead Digital Inputs View 24 Hour Run Time HistoryControl Circuit Board On/Off Status Time View Only Silence Alarm Temperature Control Response by Control TYPE-ADVANCED Microprocessor ControlsGlycool Cooling Dual Cooling SourceChilled Water Cooling Heating Operation Electric ReheatHumidity Control Hot Water/Steam HeatDehumidification/Humidification Required, in Percent % Control Types Proportional ControlChilled Water Dehumidification Dual Cooling Source DehumidificationHumidification Operation System Activation Suggested System Tuning Procedure Intelligent Control Load Control Features Connecting the Analog Sensors Analog SensorsChanging factory-set sensor inputs Additional connections available after unit deliveryWater Detection Display SetupPhysical Connections Calibration View/Change Functions Standard Alarms Alarm Descriptions and SolutionsChange Filter Compressor OverloadCustom Alarms Only With Advanced Controls High TemperatureHigh Temperature and Low Temperature Simultaneously Humidifier Problem Infrared HumidifiersLoss of Power Low TemperatureLoss of Air Flow Low HumidityOptional/Custom Alarms System Testing Component Operation and MAINTENANCE, Checks and AdjustmentsEnvironmental Control Functions Proportional Heating/Cooling/ DehumidificationFan Safety Switch Electric PanelControl Transformer and Fuses FirestatFilters Blower PackageFan Impellers and Bearings BeltsElectronic Variable Speed Drive Inverter Refrigeration SystemCompressor Oil Level Suction Pressure Discharge PressureSuction Superheat Thermostatic Expansion Valve OperationAdjustment Hot Gas Bypass Valve OperationOutdoor fan/condenser configuration Air Cooled CondenserAdjustment Johnson Controls/Penn Johnson valves Testing Function of ValveGlycol Solution Maintenance Water/Glycol Cooled Condensers Shell and Tube CondensersMechanical Failure Compressor ReplacementElectrical Failure Humidifier Compressor Replacement ProcedureInfrared Humidifier Autoflush Infrared Humidifier Cleaning System Changing Humidifier LampsAutoflush Operation Humidifier lampsSteam Generating Humidifier Steam generating humidifierControls Replacing the CanisterHumidifier canister part numbers Faults-canister generator humidifierPriority Name LED Indication Description Circuit Board Adjustments Steam generating humidifier capacityCapacity Hz Models Lbs/hr kg/hrUnit Rated Rated Values Voltage Capacity Electric ReheatVoltage AMP Set Pt Troubleshooting Blower troubleshootingChilled water troubleshooting Symptom Possible Cause Check or RemedyCompressor and refrigeration system troubleshooting Compressor and refrigeration system troubleshooting Dehumidification troubleshooting Glycol pumps troubleshootingHumidifier-steam generator troubleshooting Adjustments onHumidifier-infrared troubleshooting Reheat troubleshootingMaintenance Inspection CHECKLIST-MONTHLY Maintenance Inspection CHECKLIST-SEMIANNUAL Ne t ItiTi n That

VE, DH, VH, DE specifications

Emerson is a well-known brand in the field of automation solutions, offering a range of products that cater to various industries. Among its diverse portfolio, Emerson’s products like DE (Digital Electronics), VH (Variable Frequency Drives), DH (Distributed Control Systems), and VE (Valve Positioners) stand out for their advanced features, cutting-edge technologies, and unique characteristics.

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