Manitowoc Ice STH003 manual Liquid Line Thermistor, Function

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LIQUID LINE THERMISTOR

Function

The liquid line thermistor senses the refrigeration system liquid line temperature. This is used in conjunction with the control board to determine the length of the freeze and harvest cycles.

Specifications

10,000 Ohms ± 2% at 25°C (77°F)

CAUTION

Use only Manitowoc thermistors.

Check Procedure

Verify that the thermistor resistance is accurate and corresponding to the high and low temperature ranges.

1.Disconnect the thermistor at the control board. Connect the ohmmeter to the isolated thermistor wire leads.

2.Using a temperature meter capable of taking readings on curved copper lines, attach the temperature meter-sensing device to the liquid line next to the thermistor aluminum block.

IMPORTANT

Do not simply “insert” the sensing device under the insulation. It must be attached to and reading the actual temperature of the copper liquid line.

3.With the ice machine running, verify that the temperature of the discharge line (step 2) corresponds to the thermistor resistance reading (step 1) as stated in the temperature/resistance chart.

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Contents CM050 CM Model Ice Machines Safety Notices Procedural Notices Potential Personal Injury Situation Read These Before ProceedingPersonal Injury Potential Table of Contents Liquid Line Thermistor Model Numbers CMS050A004Drain Pump Accessories LegsManitowoc ICE Machine Cleaner and Sanitizer MODEL/SERIAL Number Location General Owner Warranty Registration CardPage Manitowoc ICE, INC Location of ICE Machine InstallationHeat of Rejection Air Conditioning** Peak ICE Machine Heat of RejectionLevelers Legs Leveling the ICE MachineDrain Connections Water SERVICE/DRAINS Water SupplyWater Inlet Lines Water Supply and Drain Line SIZING/CONNECTIONS Drain PumpGfci Requirements Electrical SpecificationsElectrical Requirements Voltage Minimum Circuit AmpacityComponent Identification Water Pump Evaporator Shutter Assembly Operational Checks BIN Thermostat AdjustmentPower Button Green Clean GreenSafety Timers ICE Machine Inspection Cleaning the CondenserAIR-COOLED Condenser Interior Cleaning and Sanitizing Place CLEANING/SANITIZING Procedure Interior Cleaning and Sanitizing GeneralPage Cleaning Procedure Page Page Removal of Parts for Cleaning and Sanitizing TOP Cover Water Shutters ICE Chute Sump Drain Overflow Tube Water Trough Spray BAR, Water Pump and Hose Spray BAR Disassembly SELF-CONTAINED AIR-COOLED ICE Machines Removal from SERVICE/LONG Term STORAGE/WINTERIZATION GeneralAutomatic Shut-Off Refrigeration System Start-UpFreeze HarvestSequence Energized Parts Chart SELF-CONTAINED ICE MachinesDiagnosing AN ICE Machine That will not RUN TroubleshootingPage ICE Machine will not Harvest ICE Quality is Poor Cubes are SHALLOW, Incomplete or White Freeze Cycle is LONG, LOW ICE Production ICE Machine Runs & no ICE is Produced Freeze Harvest Cycle Psig Beginning Freeze Cycle Discharge Pressure LOW Checklist Analyzing Suction Pressure Step ProcedureDischarge Pressure Suction Pressure High Checklist ProblemSuction Pressure LOW Checklist Problem Normal Operation HOT GAS ValveGeneral HOT GAS Valve Analysis Freeze cycle. If Function SpecificationsNo Ice on Ice on Bulb Result Check ProcedureFreeze Time Harvest Time Total Cycle Time Additional finishing time check Adjusting Finishing TimeLiquid Line Thermistor SM50 Resistance Chart TEMPERATURE/RESISTANCE ChartTotal System Refrigeration Charge Component Specifications Check Procedures Check Motor Windings to Ground Compressor Electrical DiagnosticsSingle Phase Compressors Check Resistance OHM ValuesCompressor Drawing High Amps Compressor Drawing Locked RotorRelay CapacitorPage Cycle Times Freeze Time + Harvest Time = Cycle Time Reclaim RecoverNew Product Specifications RecycleRefrigerant RE-USE Policy Page Connections Refrigerant Recovery/Evacuation/ChargingRecovery/Evacuation Charging Procedures Page System Contamination Cleanup General No symptoms or suspicion Normal Mild System Contamination Cleanup Procedure Change the vacuum pump oil Severe System Contamination Cleanup ProcedureFollow normal evacuation procedures Page FIG. a Pinching OFF Tubing Using Pinch Off ToolDo not disassemble valve Brazing Procedures for Danfoss Solenoid ValvesMAX F 700C Liquid Line Filter Drier Control Board Wiring Diagrams Tubing Schematic Manitowoc Ice, Inc