Manitowoc Ice S1800 Main Fuse, Function, Specifications, Check Procedure, BIN Switch

Page 50

Electrical System	Section 6

Component Specifications and Diagnostics

MAIN FUSE

Function

The control board fuse stops ice machine operation if electrical components fail causing high amp draw.

Specifications

The main fuse is 250 Volt, 7 amp.

Check Procedure

!Warning

High (line) voltage is applied to the control board (terminals #55 and #56) at all times. Removing the control board fuse or moving the toggle switch to OFF will not remove the power supplied to the control board.

1.If the bin switch light is on with the water curtain closed, the fuse is good.

!Warning

Disconnect electrical power to the entire ice machine before proceeding.

2.Remove the fuse. Check the resistance across the fuse with an ohm meter.

Reading	Result
Open (OL)	Replace fuse
Closed (O)	Fuse is good

BIN SWITCH

Function

Movement of the water curtain controls bin switch operation. The bin switch has two main functions:

1.Terminating the harvest cycle and returning the ice machine to the freeze cycle.

This occurs when the bin switch is opened and closed again within 30 seconds during the harvest cycle.

2.Automatic ice machine shut-off.

If the storage bin is full at the end of a harvest cycle, the sheet of cubes fails to clear the water curtain and holds it open. After the water curtain is held open for 30 seconds, the ice machine shuts off. The ice machine remains off until enough ice is removed from the storage bin to allow the sheet of cubes to drop clear of the water curtain. As the water curtain swings back to the operating position, the bin switch closes and the ice machine restarts, provide the three-minute delay has expired.

Important

The water curtain must be ON (bin switch(s) closed) to start ice making.

Specifications

The bin switch is a magnetically operated reed switch. The magnet is attached to the lower right corner of the water curtain. The switch is attached to the right bulkhead wall.

The bin switch is connected to a varying D.C. voltage circuit. (Voltage does not remain constant.)

NOTE: Because of a wide variation in D.C. voltage, it is not recommended that a voltmeter be used to check bin switch operation.

6-12	Part Number 80-1634-3

Image 50

Contents Service Manual Read These Before Proceeding Personal Injury PotentialTable of Contents Section Before Calling For Service Table of Contents Section Ice Machine OperationSection Maintenance Table of Contents Section Electrical System Section Refrigeration SystemTable of Contents Ice Cube Sizes How to Read a Model NumberModel Numbers Self-Contained Water-CooledGeneral Information Section Accessories Section General Information Model/Serial Number Location Model/Serial Number LocationWarranty Coverage Electrical and AuCS Dimensions Ice Machine DimensionsWidth, Depth, and Height Dimensions GeneralS1800M Water-Cooled Installation Instructions Section Location of Ice MachineIce Machine Heat of Rejection Series Heat of Rejection Ice Machine Air ConditioningMinimum Circuit Ampacity Section Installation Instructions Electrical ServiceVoltage Electrical RequirementsSelf Contained ICE Machine 208-230/3/60 For United Kingdom OnlySelf Contained ICE Machine 115/1/60 or 208-230/1/60 Self Contained ICE Machine 230/1/50Water Inlet Lines Cooling Tower ApplicationsWater Supply Drain ConnectionsWater Supply and Drain Line SIZING/CONNECTIONS Installation Instructions SectionTypical Water Supply Drain Installation CondenserSection Installation Instructions Installation Check List AuCS Automatic Cleaning System Potential Personal Injury SituationSection Ice Machine Operation Component IdentificationIce Machine Operation Section Sequence Of Operation Initial START-UP or START-UP After Automatic SHUT-OFFHarvest Safety TimersHarvest Sequence 5. Water Purge Automatic SHUT-OFF 7. Automatic Shut-OffICE Thickness Check Ice Machine Operation Section Operational ChecksWater Level Ice Thickness CheckWater Purge Adjustment Harvest Sequence Water PurgeIce Machine Operation Section This page Intentionally Left BlankWater-Cooled Condenser Water Regulating Valve Exterior CleaningIce Machine Inspection AlphaSan→Sachet Replacement Frequency Maintenance Section GuardianInstallation Sachet Replacement ProcedureModel Amount of Cleaner Section Maintenance Interior Cleaning and SanitizingCleaning Procedure StepSolution Type Water Mixed With Sanitizer Maintenance SectionSanitizing Procedure Removal of Parts for CLEANING/SANITIZING Solution Type Water Mixed WithIce Thickness Probe Removal Water CurtainWater Curtain Removal Ice Thickness Probe Water Distribution Tube Removal Water Distribution TubeWater Trough Water Pump Removal Water Level ProbeWater Pump Dump Valve Disassembly Water Dump ValveEvaporator Tray Removal Drain Line Check ValveWater Inlet Valve SELF-CONTAINED WATER-COOLED ICE Machines Maintenance Section Removal from Service/WinterizationPry Open the Water Regulating Valve AUCS→ Accessory Checklist Problem Possible Cause To CorrectBefore Calling For Service Section Safety Limit FeatureSELF-CONTAINED WATER-COOLED Models Energized Parts ChartsSection Electrical System Water Purge SELF-CONTAINED ModelsInitial Start-Up or Start-Up After Automatic Shut-Off Self-Contained Water PurgeSelf-Contained Refrigeration System Start-Up Refrigeration System Start Up 5 Seconds Toggle SwitchRefrigeration System START-UP PRE-CHILL Electrical System SectionFreeze Sequence Self-Contained Pre-Chill Self-Contained ModelsSelf-Contained Freeze Self-Contained Models Toggle Switch Bin Switch Control Board RelaysFreeze Harvest Sequence Harvest Self-Contained Automatic Shut-Off Automatic Shut-OffAutomatic SHUT-OFF Section Electrical System Wiring Diagrams Wiring Diagram LegendS1800 SELF-CONTAINED 1 Phase Control BoardS1800 SELF-CONTAINED 3 Phase BIN Switch SpecificationsCheck Procedure Main FuseContinuity Test SymptomsDiagnostic Aids Water Curtain Removal NotesCheck Motor Windings to Ground Compressor Electrical DiagnosticsCheck Resistance Ohm Values Determine if the Compressor is SeizedCompressor Start Sequence Ptcr DiagnosticsWhat is a PTCR? Model Automatic Shut-Off and Restart Troubleshooting PTCR’sWHY a Good Ptcr MAY Fail To Start the Compressor During Start-Up First .25 1.0 SecondsModel Manitowoc Cera-Mite Room Checking the PtcrManitowoc Ptcr Part NumberRelay Diagnosing Start ComponentsCapacitor Relay Operation CheckICE/OFF/CLEAN Toggle Switch Switch Setting Terminals Ohm ReadingElectronic Control Board Control BoardSafety Limits InputsHOW the Probe Works Freeze Time LOCK-IN FeatureIce Thickness Probe Cleaning Harvest LightDiagnosing ICE Thickness Control Circuitry Monitoring of Harvest Light CorrectionWater Level Probe Light Water Inlet Valve Safety SHUT-OFFElectrical System Section Water Level Control Circuitry Freeze Cycle CircuitryWait until the freeze cycle starts Problem Water Trough Overfilling During Freeze CycleDiagnosing Water Level Control Circuitry On or OFF Step Check Self Contained 1 Phase with Terminal Board SELF-CONTAINED Water -COOLED Models Freeze Cycle Refrigeration SequenceRefrigeration System Section S1800 SELF-CONTAINED Tubing Schematic General ICE Production Check Before Beginning ServiceWeights are in pounds Times are in minutesPossible Problem Corrective Action INSTALLATION/VISUAL Inspection ChecklistWater System Checklist Normal Ice Formation ICE Formation PatternExtremely Thin at Evaporator Outlet Extremely Thin at Evaporator Inlet No Ice FormationAnalyzing Why Safety Limits May Stop the Ice Machine Safety LimitsSafety Limit Indication Safety Limit Notes Possible Cause Check/CorrectSection Refrigeration System Freeze Cycle Discharge Pressure Low Checklist ProcedureFreeze Cycle Discharge Pressure High Checklist Analyzing Discharge Pressure During Freeze or Harvest CycleStep Example Using SY1004A Model Ice Machine Analyzing Suction Pressure During Freeze CycleFreeze Cycle Suction Pressure High Checklist Freeze Cycle Suction Pressure Low ChecklistFindings Comments Harvest Valve Temperature Check GeneralHarvest Valve Analysis Discharge Line Temperature Analysis General Column 2 LOW CHARGE/TXV Starving Final AnalysisColumn 1 Harvest Valve Leaking Column 3 TXV FloodingRefrigeration System Operational Analysis Tables Models Dual Expansion Valve Ice Machine Model NumberHigh Pressure CUT-OUT Hpco Control Hour Ice Production S1800 SeriesSelf-Contained Water-Cooled Cycle Times Operating PressuresSELF-CONTAINED RECOVERY/EVACUATION ConnectionsSelf-Contained Charging Procedures Charging ConnectionsSystem Contamination CLEAN-UP Determining Severity Of ContaminationMild System Contamination Cleanup Procedure Severe System Contamination Cleanup ProcedureSection Refrigeration System 10. Using Pinch-Off Tool FILTER-DRIERS Drier End Part Model Connection Size Number48 oz Total System Refrigerant ChargesSeries Version Charge S1800M Refrigerant Definitions RecoverNew Product Specifications RecycleNew Refrigerant Recovered or Recycled RefrigerantRefrigerant RE-USE Policy Reclaimed RefrigerantHFC Refrigerant Questions and Answers This page Intentionally Left Blank Page Attend a Manitowoc Factory Service School