Manitowoc Ice STH003 manual Freeze Cycle is LONG, LOW ICE Production

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FREEZE CYCLE IS LONG, LOW ICE PRODUCTION

Problem

•Cause

Water temperature is too high

•Connect to a cold water supply, verify check valves in faucets and other equipment are functioning correctly

Dirty Condenser

•Clean condenser

High air temperature entering condenser

•Air temperature must not exceed 120°F (39°C)

Water inlet valve filter screen is dirty

•Remove the water inlet valve and clean the filter

screen

Water inlet valve stuck open or leaking

•Turn off ice machine, if water continues to enter

ice machine, verify water pressure is ok then replace water inlet valve

Water inlet valve is not working

•Water inlet valve must be replaced

Refrigeration problem

•Refer to refrigeration diagnostics

Water escaping from sump during freeze cycle

•Check standpipe and drain

•Check for water tracking out of water circuit

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Contents CM050 CM Model Ice Machines Safety Notices Procedural Notices Read These Before Proceeding Personal Injury PotentialPotential Personal Injury Situation Table of Contents Liquid Line Thermistor Model Numbers CMS050A004Accessories Legs Manitowoc ICE Machine Cleaner and SanitizerDrain Pump 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 MachineWater SERVICE/DRAINS Water Supply Water Inlet LinesDrain Connections Water Supply and Drain Line SIZING/CONNECTIONS Drain PumpElectrical Requirements Voltage Electrical SpecificationsMinimum Circuit Ampacity Gfci RequirementsComponent Identification Water Pump Evaporator Shutter Assembly Power Button Green BIN Thermostat AdjustmentClean Green Operational ChecksSafety 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 GeneralFreeze Refrigeration System Start-UpHarvest Automatic Shut-OffSequence 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 ProcedureSuction Pressure High Checklist Problem Suction Pressure LOW Checklist ProblemDischarge Pressure HOT GAS Valve GeneralNormal Operation 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 Single Phase Compressors Compressor Electrical DiagnosticsCheck Resistance OHM Values Check Motor Windings to GroundCompressor Drawing High Amps Compressor Drawing Locked RotorRelay CapacitorPage Cycle Times Freeze Time + Harvest Time = Cycle Time New Product Specifications RecoverRecycle ReclaimRefrigerant 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