Manuals / Manitowoc Ice / Kitchen Appliance / Ice Maker

Manitowoc Ice S1800 service manual Harvest

Models: S1800

1 100

Download 100 pages 24.15 Kb

Page 45

Section 6	Electrical System

6. HARVEST

The harvest valve(s) remains open and the refrigerant gas warms the evaporator. This causes the cubes to slide, as a sheet, off the evaporator and into the storage bin.

The sliding sheet of cubes swings the water curtain out, opening the bin switch. This momentary opening and closing of the bin switch terminates the Harvest Cycle and returns the ice machine to the Freeze Cycle (steps 3-4).

The air compressor (when used) remains energized throughout the entire harvest cycle. The air compressor will automatically energize after 60 seconds when the harvest cycle time exceeded 75 seconds in the previous cycle.

L1					L2 or N
L1	Ground
	Ground			Water Valve	(99)
				Water Valve
			(20)	(21)
	(89)	(55)	(20)	(21)
	(89)	(55)	(61)	(22)
	High		(61)	(22)
	High	Control Board		Harvest Valve
	Pressure	Control Board
	Pressure	(2)
(88)	Cutout	(2)	(60)	(77)
(88)	Cutout	(6)		(77)
		(6)		(80)
		(5)		Dump Valve	(75)
		(1)		(76)	(75)
		(7)		(81)
		(4)	(57)	Water Pump
			(57)	(98)
				(98)
	(42)	Trans.

Fuse (7a)	(58)	Terminates at
Fuse (7a)		Terminates at
		Pin Connection

					(59)
			L2		Contactor Coil
			(25)		(56)
				(26)	Air Compressor
				(26)
Ice Thickness		(9)			(74)
Probe		(9)	(8)		(74)
Water Level Probe				Bin Switch
Water Level Probe		Low DC		(6)
		Low DC		(6)
		Voltage			Clean
		Plug		(1)	Clean
		Plug			OFF
					OFF
				(2)	ICE
		(Red)		(2)
		(Red)
		Compressor
Contactor	Overload	(Yellow)		(46)	Run Capacitor
Contactor	Overload				(50)
Contacts					(50)
(Black)					(45)
L1					(45)
(51)	(85)	(86)		PTCR
(51)	(85)	(86)		Fan Motor
	Fan Cycle			Fan Motor
	Fan Cycle
	Control

		Run Capacitor
			SV3137-7
Table 6-6. Self-Contained Models

	6. Harvest (Until Bin Switch Activation)
Toggle Switch			ICE
Bin Switch			Closed
Control Board Relays
#1	Water Pump		OFF
#2	Harvest Valve (Left)		ON
#3	Harvest Valve (Right)		ON (When Used)
#4	Air Compressor		ON (When Used)
#5	Water Inlet Valve		OFF
#6	Water Dump Valve		OFF
#7	Contactor Coil		Closed / ON
#7A	Compressor		ON
#7B	Condenser Fan Motor		OFF; May Cycle ON
Safety Controls (Which could stop ice machine operation)
	High Pressure Cut-Out		Closed
	Main Fuse (On Control Board)		Closed

Part Number 80-1634-3

6-7

Image 45

Manitowoc Ice S1800 service manual Harvest

Contents

Service Manual Personal Injury Potential Read These Before Proceeding Table of Contents Table of Contents Section Ice Machine Operation Section MaintenanceSection Before Calling For Service Section Refrigeration System Table of Contents Section Electrical System Table of Contents Model Numbers How to Read a Model NumberIce Cube Sizes Self-Contained Water-Cooled General Information Section Accessories Model/Serial Number Location Section General Information Model/Serial Number Location Warranty Coverage Width, Depth, and Height Dimensions Ice Machine DimensionsElectrical and AuCS Dimensions General Ice Machine Heat of Rejection Installation Instructions Section Location of Ice MachineS1800M Water-Cooled Series Heat of Rejection Ice Machine Air Conditioning Voltage Section Installation Instructions Electrical ServiceMinimum Circuit Ampacity Electrical Requirements Self Contained ICE Machine 115/1/60 or 208-230/1/60 For United Kingdom OnlySelf Contained ICE Machine 208-230/3/60 Self Contained ICE Machine 230/1/50 Water Supply Cooling Tower ApplicationsWater Inlet Lines Drain Connections Typical Water Supply Drain Installation Installation Instructions SectionWater Supply and Drain Line SIZING/CONNECTIONS Condenser Section Installation Instructions Installation Check List Potential Personal Injury Situation AuCS Automatic Cleaning System Component Identification Section Ice Machine Operation Initial START-UP or START-UP After Automatic SHUT-OFF Ice Machine Operation Section Sequence Of Operation Harvest Sequence 5. Water Purge Safety TimersHarvest Automatic SHUT-OFF 7. Automatic Shut-Off Water Level Ice Machine Operation Section Operational ChecksICE Thickness Check Ice Thickness Check Harvest Sequence Water Purge Water Purge Adjustment This page Intentionally Left Blank Ice Machine Operation Section Ice Machine Inspection Exterior CleaningWater-Cooled Condenser Water Regulating Valve AlphaSan→ Installation Maintenance Section GuardianSachet Replacement Frequency Sachet Replacement Procedure Cleaning Procedure Section Maintenance Interior Cleaning and SanitizingModel Amount of Cleaner Step Maintenance Section Sanitizing ProcedureSolution Type Water Mixed With Sanitizer Solution Type Water Mixed With Removal of Parts for CLEANING/SANITIZING Water Curtain Water Curtain Removal Ice Thickness ProbeIce Thickness Probe Removal Water Distribution Tube Water TroughWater Distribution Tube Removal Water Level Probe Water PumpWater Pump Removal Water Dump Valve Dump Valve Disassembly Drain Line Check Valve Evaporator Tray Removal Water Inlet Valve Maintenance Section Removal from Service/Winterization Pry Open the Water Regulating Valve AUCS→ AccessorySELF-CONTAINED WATER-COOLED ICE Machines Problem Possible Cause To Correct Checklist Safety Limit Feature Before Calling For Service Section Energized Parts Charts Section Electrical SystemSELF-CONTAINED WATER-COOLED Models Initial Start-Up or Start-Up After Automatic Shut-Off SELF-CONTAINED ModelsWater Purge Self-Contained Water Purge Refrigeration System Start Up 5 Seconds Toggle Switch Refrigeration System START-UPSelf-Contained Refrigeration System Start-Up Freeze Sequence Electrical System SectionPRE-CHILL Self-Contained Pre-Chill Self-Contained Models Toggle Switch Bin Switch Control Board Relays FreezeSelf-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 Diagrams Control Board S1800 SELF-CONTAINED 1 Phase S1800 SELF-CONTAINED 3 Phase Check Procedure SpecificationsBIN Switch Main Fuse Diagnostic Aids SymptomsContinuity Test Water Curtain Removal Notes Check Resistance Ohm Values Compressor Electrical DiagnosticsCheck Motor Windings to Ground Determine if the Compressor is Seized Ptcr Diagnostics What is a PTCR?Compressor Start Sequence WHY a Good Ptcr MAY Fail To Start the Compressor Troubleshooting PTCR’sModel Automatic Shut-Off and Restart During Start-Up First .25 1.0 Seconds Manitowoc Ptcr Checking the PtcrModel Manitowoc Cera-Mite Room Part Number Capacitor Diagnosing Start ComponentsRelay Relay Operation Check Switch Setting Terminals Ohm Reading ICE/OFF/CLEAN Toggle Switch Control Board Electronic Control Board Inputs Safety Limits Ice Thickness Probe Cleaning Freeze Time LOCK-IN FeatureHOW the Probe Works Harvest Light Monitoring of Harvest Light Correction Diagnosing ICE Thickness Control Circuitry Electrical System Section Water Level Control Circuitry Water Inlet Valve Safety SHUT-OFFWater Level Probe Light Freeze Cycle Circuitry Problem Water Trough Overfilling During Freeze Cycle Diagnosing Water Level Control CircuitryWait 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 Models Refrigeration System Section S1800 SELF-CONTAINED Tubing Schematic General Weights are in pounds Before Beginning ServiceICE Production Check Times are in minutes INSTALLATION/VISUAL Inspection Checklist Water System ChecklistPossible Problem Corrective Action ICE Formation Pattern Extremely Thin at Evaporator OutletNormal Ice Formation No Ice Formation Extremely Thin at Evaporator Inlet Safety Limits Safety Limit IndicationAnalyzing Why Safety Limits May Stop the Ice Machine Possible Cause Check/Correct Safety Limit Notes Section Refrigeration System Freeze Cycle Discharge Pressure High Checklist ProcedureFreeze Cycle Discharge Pressure Low Checklist Analyzing Discharge Pressure During Freeze or Harvest Cycle Analyzing Suction Pressure During Freeze Cycle Step Example Using SY1004A Model Ice Machine Freeze Cycle Suction Pressure Low Checklist Freeze Cycle Suction Pressure High Checklist Harvest Valve Temperature Check General Harvest Valve AnalysisFindings Comments Discharge Line Temperature Analysis General Column 1 Harvest Valve Leaking Final AnalysisColumn 2 LOW CHARGE/TXV Starving Column 3 TXV Flooding Models Dual Expansion Valve Ice Machine Model Number Refrigeration System Operational Analysis Tables High Pressure CUT-OUT Hpco Control Self-Contained Water-Cooled Cycle Times S1800 SeriesHour Ice Production Operating Pressures Connections SELF-CONTAINED RECOVERY/EVACUATION Charging Connections Self-Contained Charging Procedures Determining Severity Of Contamination System Contamination CLEAN-UP Severe System Contamination Cleanup Procedure Mild System Contamination Cleanup Procedure Section Refrigeration System 10. Using Pinch-Off Tool Drier End Part Model Connection Size Number FILTER-DRIERS Total System Refrigerant Charges Series Version Charge S1800M48 oz New Product Specifications RecoverRefrigerant Definitions Recycle Refrigerant RE-USE Policy Recovered or Recycled RefrigerantNew Refrigerant Reclaimed Refrigerant HFC Refrigerant Questions and Answers This page Intentionally Left Blank Page Attend a Manitowoc Factory Service School