Manitowoc Ice S1800 service manual Self-Contained Freeze Self-Contained Models

Page 43

Section 6

Electrical System

 

 

4. FREEZE

The water pump starts after the pre- chill. An even flow of water is directed across the evaporator and into each cube cell, where it freezes.

The water fill valve will cycle off then on one more time to refill the water trough.

When sufficient ice has formed, the water flow (not the ice) contacts the ice thickness probes. After approximately 10 seconds of continual contact, a harvest cycle is initiated.

NOTE: The ice machine cannot initiate a harvest cycle until a 6- minute freeze lock has expired.

L1

 

 

 

L2 or N

Ground

 

 

Water Valve

(99)

 

 

 

 

 

(20)

(21)

(89)

(55)

 

(61)

(22)

 

High

 

 

Control Board

 

Harvest Valve

 

Pressure

 

 

(2)

 

 

(88) Cutout

(60)

(77)

 

(6)

 

 

(80)

 

 

(5)

 

Dump Valve

(75)

 

(1)

 

(76)

 

(7)

 

(81)

 

 

(4)

(57)

Water Pump

 

 

 

(98)

 

 

 

 

 

(42)

Trans.

(58)

 

 

 

Fuse (7a)

Terminates at

 

 

 

 

 

 

 

Pin Connection

 

 

 

 

 

 

 

(59)

 

 

 

L2

 

 

Contactor Coil

 

 

 

(25)

 

 

(56)

 

 

 

 

(26)

 

Air Compressor

 

 

 

 

 

 

Ice Thickness

 

(9)

 

 

 

(74)

Probe

 

(8)

 

 

Water Level Probe

 

 

 

 

Bin Switch

 

Low DC

 

(6)

 

 

 

 

 

 

 

Voltage

 

 

 

Clean

 

 

Plug

 

(1)

 

 

 

 

 

OFF

 

 

 

 

 

 

 

 

 

(2)

 

ICE

 

 

(Red)

 

 

 

 

 

 

 

 

 

 

 

Compressor

 

 

Run Capacitor

Contactor

Overload

(Yellow)

 

(46)

 

 

 

 

 

 

(50)

Contacts

 

 

 

 

 

(Black)

 

 

 

 

 

(45)

L1

 

 

 

 

 

(51)

(85)

(86)

 

 

PTCR

 

Fan Motor

 

Fan Cycle

 

 

 

 

 

 

 

Control

 

 

 

 

Run Capacitor

SV3137-5

 

Self-Contained — Freeze

Table 6-4. Self-Contained Models

4.Freeze (Until 10 Seconds of Water Contact with Ice Thickness Probe)

Toggle Switch

Bin Switch

Control Board Relays

ICE

Closed

#1

Water Pump

ON

#2

Harvest Valve (Left)

OFF

#3

Harvest Valve (Right)

OFF (When Used)

#4

Air Compressor

OFF (When Used)

#5

Water Inlet Valve

Cycles OFF, then ON

one more time

 

 

#6

Water Dump Valve

OFF

#7

Contactor Coil

Closed / ON

#7A

Compressor

ON

#7B

Condenser Fan Motor

May Cycle ON / OFF

Safety Controls (Which could stop ice machine operation)

 

 

High Pressure Cut-Out

Closed

 

Main Fuse (On Control Board)

Closed

Part Number 80-1634-3

6-5

Page 42 Page 44
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Page 42 Page 44
Contents Service Manual Personal Injury Potential Read These Before ProceedingTable of Contents Section Maintenance Table of Contents Section Ice Machine OperationSection Before Calling For Service Section Refrigeration System Table of Contents Section Electrical SystemTable of Contents Self-Contained Water-Cooled How to Read a Model NumberModel Numbers Ice Cube SizesGeneral Information Section Accessories Model/Serial Number Location Section General Information Model/Serial Number LocationWarranty Coverage General Ice Machine DimensionsWidth, Depth, and Height Dimensions Electrical and AuCS DimensionsSeries Heat of Rejection Ice Machine Air Conditioning Installation Instructions Section Location of Ice MachineIce Machine Heat of Rejection S1800M Water-CooledElectrical Requirements Section Installation Instructions Electrical ServiceVoltage Minimum Circuit AmpacitySelf Contained ICE Machine 230/1/50 For United Kingdom OnlySelf Contained ICE Machine 115/1/60 or 208-230/1/60 Self Contained ICE Machine 208-230/3/60Drain Connections Cooling Tower ApplicationsWater Supply Water Inlet LinesCondenser Installation Instructions SectionTypical Water Supply Drain Installation Water Supply and Drain Line SIZING/CONNECTIONSSection Installation Instructions Installation Check List Potential Personal Injury Situation AuCS Automatic Cleaning SystemComponent Identification Section Ice Machine OperationInitial START-UP or START-UP After Automatic SHUT-OFF Ice Machine Operation Section Sequence Of OperationAutomatic SHUT-OFF 7. Automatic Shut-Off Safety TimersHarvest Sequence 5. Water Purge HarvestIce Thickness Check Ice Machine Operation Section Operational ChecksWater Level ICE Thickness CheckHarvest Sequence Water Purge Water Purge AdjustmentThis page Intentionally Left Blank Ice Machine Operation SectionAlphaSan→ Exterior CleaningIce Machine Inspection Water-Cooled Condenser Water Regulating ValveSachet Replacement Procedure Maintenance Section GuardianInstallation Sachet Replacement FrequencyStep Section Maintenance Interior Cleaning and SanitizingCleaning Procedure Model Amount of CleanerSanitizing Procedure Maintenance SectionSolution Type Water Mixed With Sanitizer Solution Type Water Mixed With Removal of Parts for CLEANING/SANITIZINGWater Curtain Removal Ice Thickness Probe Water CurtainIce Thickness Probe Removal Water Trough Water Distribution TubeWater Distribution Tube Removal Water Pump Water Level ProbeWater Pump Removal Water Dump Valve Dump Valve DisassemblyDrain Line Check Valve Evaporator Tray RemovalWater Inlet Valve Pry Open the Water Regulating Valve AUCS→ Accessory Maintenance Section Removal from Service/WinterizationSELF-CONTAINED WATER-COOLED ICE Machines Problem Possible Cause To Correct ChecklistSafety Limit Feature Before Calling For Service SectionSection Electrical System Energized Parts ChartsSELF-CONTAINED WATER-COOLED Models Self-Contained Water Purge SELF-CONTAINED ModelsInitial Start-Up or Start-Up After Automatic Shut-Off Water PurgeRefrigeration System START-UP Refrigeration System Start Up 5 Seconds Toggle SwitchSelf-Contained Refrigeration System Start-Up Self-Contained Pre-Chill Self-Contained Models Electrical System SectionFreeze Sequence PRE-CHILLFreeze Toggle Switch Bin Switch Control Board RelaysSelf-Contained Freeze Self-Contained Models Harvest Sequence Harvest Automatic SHUT-OFF Automatic Shut-OffSelf-Contained Automatic Shut-Off Wiring Diagram Legend Section Electrical System Wiring DiagramsControl Board S1800 SELF-CONTAINED 1 PhaseS1800 SELF-CONTAINED 3 Phase Main Fuse SpecificationsCheck Procedure BIN SwitchWater Curtain Removal Notes SymptomsDiagnostic Aids Continuity TestDetermine if the Compressor is Seized Compressor Electrical DiagnosticsCheck Resistance Ohm Values Check Motor Windings to GroundWhat is a PTCR? Ptcr DiagnosticsCompressor Start Sequence During Start-Up First .25 1.0 Seconds Troubleshooting PTCR’sWHY a Good Ptcr MAY Fail To Start the Compressor Model Automatic Shut-Off and RestartPart Number Checking the PtcrManitowoc Ptcr Model Manitowoc Cera-Mite RoomRelay Operation Check Diagnosing Start ComponentsCapacitor RelaySwitch Setting Terminals Ohm Reading ICE/OFF/CLEAN Toggle SwitchControl Board Electronic Control BoardInputs Safety LimitsHarvest Light Freeze Time LOCK-IN FeatureIce Thickness Probe Cleaning HOW the Probe WorksMonitoring of Harvest Light Correction Diagnosing ICE Thickness Control CircuitryFreeze Cycle Circuitry Water Inlet Valve Safety SHUT-OFFElectrical System Section Water Level Control Circuitry Water Level Probe LightDiagnosing Water Level Control Circuitry Problem Water Trough Overfilling During Freeze CycleWait until the freeze cycle starts On or OFF Step Check Self Contained 1 Phase with Terminal Board Freeze Cycle Refrigeration Sequence SELF-CONTAINED Water -COOLED ModelsRefrigeration System Section S1800 SELF-CONTAINED Tubing Schematic General Times are in minutes Before Beginning ServiceWeights are in pounds ICE Production CheckWater System Checklist INSTALLATION/VISUAL Inspection ChecklistPossible Problem Corrective Action Extremely Thin at Evaporator Outlet ICE Formation PatternNormal Ice Formation No Ice Formation Extremely Thin at Evaporator InletSafety Limit Indication Safety LimitsAnalyzing Why Safety Limits May Stop the Ice Machine Possible Cause Check/Correct Safety Limit NotesSection Refrigeration System Analyzing Discharge Pressure During Freeze or Harvest Cycle ProcedureFreeze Cycle Discharge Pressure High Checklist Freeze Cycle Discharge Pressure Low ChecklistAnalyzing Suction Pressure During Freeze Cycle Step Example Using SY1004A Model Ice MachineFreeze Cycle Suction Pressure Low Checklist Freeze Cycle Suction Pressure High ChecklistHarvest Valve Analysis Harvest Valve Temperature Check GeneralFindings Comments Discharge Line Temperature Analysis General Column 3 TXV Flooding Final AnalysisColumn 1 Harvest Valve Leaking Column 2 LOW CHARGE/TXV StarvingModels Dual Expansion Valve Ice Machine Model Number Refrigeration System Operational Analysis TablesHigh Pressure CUT-OUT Hpco Control Operating Pressures S1800 SeriesSelf-Contained Water-Cooled Cycle Times Hour Ice ProductionConnections SELF-CONTAINED RECOVERY/EVACUATIONCharging Connections Self-Contained Charging ProceduresDetermining Severity Of Contamination System Contamination CLEAN-UPSevere System Contamination Cleanup Procedure Mild System Contamination Cleanup ProcedureSection Refrigeration System 10. Using Pinch-Off Tool Drier End Part Model Connection Size Number FILTER-DRIERSSeries Version Charge S1800M Total System Refrigerant Charges48 oz Recycle RecoverNew Product Specifications Refrigerant DefinitionsReclaimed Refrigerant Recovered or Recycled RefrigerantRefrigerant RE-USE Policy New RefrigerantHFC Refrigerant Questions and Answers This page Intentionally Left Blank Page Attend a Manitowoc Factory Service School
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