Manitowoc NEO UD0310AE Spécifications

Technician’s HandbookThis manual is updated as new information and models are released. Visit our website for the latest manual. www.manitowocice.comA

10 Part Number STH042 3/14OPERATIONTouch Pad Features . . . . . . . . . . . . . . . . 47On/Off . . . . . . . . . . . . . . . . . . . . . . . . . 47D

100 Part Number STH042 3/14Float SwitchFunctionOpen and close to indicate to the control board the level of water in the water trough. SpecificationsN

Part Number STH042 3/14 101NOTE: Make adjustments with the ice machine in the off position. Making adjustments during the freeze cycle may produce an

102 Part Number STH042 3/14Compressor Electrical DiagnosticsThe compressor does not start or will trip repeatedly on overload.Check Resistance (Ohm) V

Part Number STH042 3/14 103Compressor Drawing Locked RotorThe two likely causes of this are:• Defective starting component• Mechanically seized compre

104 Part Number STH042 3/14Fan Cycle ControlFunctionCycles the fan motor on and off to maintain proper operating discharge pressure.The fan cycle cont

Part Number STH042 3/14 105High Pressure Cutout (HPCO) ControlFunctionStops the ice machine if subjected to excessive high-side pressure.The HPCO cont

106 Part Number STH042 3/14Filter-DriersLiquid Line Filter DrierThe filter-drier used on Manitowoc ice machines are manufactured to Manitowoc specific

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108 Part Number STH042 3/14Refrigerant Recovery/EvacuationDEFINITIONSRecoverTo remove refrigerant, in any condition, from a system and store it in an

Part Number STH042 3/14 109REFRIGERANT RE-USE POLICYManitowoc recognizes and supports the need for proper handling, re-use, and disposal of refrigeran

Part Number STH042 3/14 11COMPONENT CHECK PROCEDURESMain Fuse . . . . . . . . . . . . . . . . . . . . . . . . . 95Bin Switch . . . . . . . . . . . .

110 Part Number STH042 3/144. Recovered refrigerant must come from a “contaminant-free” system. To decide whether the system is contaminant free, cons

Part Number STH042 3/14 111RECOVERY AND RECHARGING PROCEDURES Do not purge refrigerant to the atmosphere. Capture refrigerant using recovery equipment

112 Part Number STH042 3/14SELF-CONTAINED RECOVERY/EVACUATION1. Place the power button in the OFF position.2. Install manifold gauge set, charging cyl

Part Number STH042 3/14 1137. Close the high side on the manifold gauge set. Add any remaining vapor charge through the suction service valve (if nece

114 Part Number STH042 3/14System Contamination CleanupThis section describes the basic requirements for restoring contaminated systems to reliable se

Part Number STH042 3/14 115Contamination/Cleanup ChartSymptoms/FindingsRequired Cleanup ProcedureNo symptoms or suspicion of contaminationNormal evacu

116 Part Number STH042 3/14MILD SYSTEM CONTAMINATION CLEANUP PROCEDURE1. Replace any failed components.2. If the compressor is good, change the oil.3.

Part Number STH042 3/14 117SEVERE SYSTEM CONTAMINATION CLEANUP PROCEDURE1. Remove the refrigerant charge.2. Remove the compressor.3. Disassemble the h

118 Part Number STH042 3/14REPLACING PRESSURE CONTROLS WITHOUT REMOVING REFRIGERANT CHARGEThis procedure reduces repair time and cost. Use it when any

Part Number STH042 3/14 119Using Pinch Off ToolSV1406FIG. A - “PINCHING OFF” TUBINGFIG. B - RE-ROUNDING TUBING

12 Part Number STH042 3/14CHARTSCycle Times, 24 Hr. Ice Production and Refrigerant Pressure Charts . . . . . . . . . . 121U0140 Self-contained Air-co

120 Part Number STH042 3/14Total System Refrigerant ChargeImportantThis information is for reference only. Refer to the ice machine serial number tag

Part Number STH042 3/14 121ChartsCycle Times, 24 Hr. Ice Production and Refrigerant Pressure ChartsThese charts are used as guidelines to verify corre

122 Part Number STH042 3/14U0140 SELF-CONTAINED AIR-COOLEDNOTE: These characteristics may vary depending on operating conditions.Cycle TimesFreeze Tim

Part Number STH042 3/14 123U0140 SELF-CONTAINED WATER-COOLEDNOTE: These characteristics may vary depending on operating conditions.Cycle TimesFreeze T

124 Part Number STH042 3/14U0190 SELF-CONTAINED AIR-COOLEDNOTE: These characteristics may vary depending on operating conditions.Cycle TimesFreeze Tim

Part Number STH042 3/14 125U0240 SELF-CONTAINED AIR-COOLEDNOTE: These characteristics may vary depending on operating conditions.Cycle TimesFreeze Tim

126 Part Number STH042 3/14U0240 SELF-CONTAINED WATER-COOLEDNOTE: These characteristics may vary depending on operating conditions.Cycle TimesFreeze T

Part Number STH042 3/14 127U0310 SELF-CONTAINED AIR-COOLEDNOTE: These characteristics may vary depending on operating conditions. Data on this page is

128 Part Number STH042 3/14U0310 SELF-CONTAINED WATER-COOLEDNOTE: These characteristics may vary depending on operating conditions. Data on this page

Part Number STH042 3/14 129DiagramsWiring DiagramsThe following pages contain electrical wiring diagrams Be sure you are referring to the correct diag

Part Number STH042 3/14 13General InformationModel NumbersThis manual covers the following models: Self-containedAir-cooledSelf-containedWater-cooledU

130 Part Number STH042 3/14WIRING DIAGRAM - ALL MODELS

Part Number STH042 3/14 131ELECTRONIC CONTROL BOARDWATER PUMPMAIN COMPWATER DUMPHARVESTWATER FILLFUSEHIGH FLOATLOW FLOATBIN SWITCHTEST SWITCHWATER LEV

132 Part Number STH042 3/14Tubing Schematic - U0140HEAT EXCHANGERSTRAINERCOMPRESSORDRIEREVAPORATORHARVEST SOLENOIDAIR OR WATER CONDENSEREXPANSION VALV

Part Number STH042 3/14 133Tubing Schematic - U0190/U0240/U0310HEAT EXCHANGERSTRAINERDRIEREVAPORATORHARVEST SOLENOID VALVEAIR OR WATER CONDENSEREXPANS

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Manitowoc Ice2110 South 26th Street, P.O. Box 1720Manitowoc, WI 54221-1720, USAPh: 920-682-0161 Fax: 920-683-7589Visit us online at: www.manitowocfoo

14 Part Number STH042 3/14How to Read a Model Number! WarningAn ice machine contains high voltage electricity and refrigerant charge. Repairs are to b

Part Number STH042 3/14 15Ice Machine Warranty InformationOwner Warranty Registration CardGeneralWarranty coverage begins the day the ice machine is i

16 Part Number STH042 3/14ExclusionsThe following items are not included in the ice machine’s warranty coverage:1. Normal maintenance, adjustments and

Part Number STH042 3/14 17RESIDENTIAL WARRANTY COVERAGEWhat Does this Limited Warranty Cover?Subject to the exclusions and limitations below, Manitowo

18 Part Number STH042 3/14What Is Not Covered?This limited warranty does cover, and you are solely responsible for the costs of: (1) periodic or routi

Part Number STH042 3/14 19How State Law Applies This limited warranty gives you specific legal rights, and you may also have rights that vary from sta

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Part Number STH042 3/14 21InstallationLocation of Ice MachineThe location selected for the ice machine must meet the following criteria. If any of the

22 Part Number STH042 3/14Ice Machine Clearance Requirements*NOTE: The ice machine may be built into a cabinet.There is no minimum clearance requireme

Part Number STH042 3/14 23Leveling the Ice Machine1. Screw the leveling legs onto the bottom of the ice machine.2. Screw the foot of each leg in as fa

24 Part Number STH042 3/14Electrical RequirementsVoltageThe maximum allowable voltage variation is ±10% of the rated voltage on the ice machine model/

Part Number STH042 3/14 25Electrical SpecificationsAir-cooled Ice MachineNOTE: * Indicates preliminary dataIce MachineVoltage Phase CycleMax. Fuse/Cir

26 Part Number STH042 3/14Water-cooled Ice MachineNOTE: * Indicates preliminary dataIce MachineVoltage Phase CycleMax. Fuse/Circuit BreakerTotal AmpsU

Part Number STH042 3/14 27Water Service/DrainsWATER SUPPLYLocal water conditions may require treatment of the water to inhibit scale formation, filter

28 Part Number STH042 3/14DRAIN CONNECTIONSFollow these guidelines when installing drain lines to prevent drain water from flowing back into the ice m

Part Number STH042 3/14 29WATER SUPPLY AND DRAIN LINE SIZING/CONNECTIONS Tubing Size Up to Ice Machine Fitting3/8" (9.5 mm) min. inside diameter3

Safety NoticesAs you work on Manitowoc equipment, be sure to pay close attention to the safety notices in this handbook. Disregarding the notices may

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Part Number STH042 3/14 31MaintenanceInterior Cleaning and SanitizingGENERALClean and sanitize the ice machine every six months for efficient operatio

32 Part Number STH042 3/14TOUCH PAD OPERATIONPressing and holding the clean button for 3 seconds starts the clean cycle. The Clean & On/Off lights

Part Number STH042 3/14 33Step 3 To start a cleaning cycle, press the Clean button. Water will flow through the water dump valve and down the drain.

34 Part Number STH042 3/14Step 5 Mix a solution of cleaner and warm water. Depending on the amount of mineral buildup, a larger quantity of solution

Part Number STH042 3/14 35Step 7 Mix a solution of sanitizer and warm water. Use half of the sanitizer/water solution to sanitize all removed compon

36 Part Number STH042 3/14REMOVE PARTS FOR CLEANINGA. Remove the Harvest Float Switch and Ice Thickness Float Switch• Pull forward on the bottom of th

Part Number STH042 3/14 37WIRE CONNECTORS ARE LOCATED BEHIND BULKHEAD PULL THROUGH GROMMET TO DISCONNECTICE THICKNESS FLOAT SWITCH & BRACKETHARVES

38 Part Number STH042 3/14B. Remove the Water Trough• Remove the upper thumbscrew.• While supporting the water trough remove the thumbscrew from benea

Part Number STH042 3/14 39C. Remove the Ice Damper• Remove thumbscrew from bin switch cover.• Support ice damper and then pull bin switch cover and ic

Procedural NoticesAs you work on Manitowoc equipment, be sure to read the procedural notices in this handbook. These notices supply helpful informatio

40 Part Number STH042 3/14D. Remove the Water Distribution Tube• Distribution tube thumbscrews are retained to prevent loss. Loosen thumbscrews but do

Part Number STH042 3/14 41Preventative Maintenance CleaningThis cleaning procedure can be performed between the bi-annual cleaning and sanitizing cycl

42 Part Number STH042 3/14Ice Machine InspectionCheck all water fittings and lines for leaks. Also, make sure the refrigeration tubing is not rubbing

Part Number STH042 3/14 43Cleaning the CondenserGeneralA dirty condenser restricts airflow, resulting in excessively high operating temperatures. This

44 Part Number STH042 3/14Removal from Service/Winterization1. Clean and sanitize the ice machine.2. Press the On/Off button to turn off the ice machi

Part Number STH042 3/14 45Bin Removal1. Disconnect power.1. Remove all ice from bin.2. Loosen screws and slide clips to release.3. Disconnect clamp an

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Part Number STH042 3/14 47OperationTouch Pad FeaturesThe touch pad offers a series of pressure sensitive buttons to control ice machine operation and

48 Part Number STH042 3/14DELAY Pressing the Delay button will start a delay period. The ice machine will finish the freeze and harvest cycle and then

Part Number STH042 3/14 49BIN FULLThe Bin Full light energizes when the bin is full or is de-energized if the bin is not full.SERVICEThe service light

Read These Before Proceeding:!CautionProper installation, care and maintenance are essential for maximum performance and trouble-free operation of you

50 Part Number STH042 3/14Ice Making Sequence of OperationNOTE: The On/Off button must be depressed and the ice damper must be closed before the ice m

Part Number STH042 3/14 51CONTROL BOARD TIMERS • The ice machine is locked into the freeze cycle for 6 minutes before a harvest cycle can be initiated

52 Part Number STH042 3/14SAFETY LIMITSSafety limits are stored and indicated by the control board. The number of cycles required to stop the ice mach

Part Number STH042 3/14 53Safety Limit 3If the freeze time reaches 4 minutes and water is not sensed (float remains down for 10 continuous seconds) th

54 Part Number STH042 3/14ENERGIZED PARTS CHARTSelf-Contained Ice MachinesICE MAKING SEQUENCE OF OPERATIONWater Pump Harvest ValveWater Inlet ValveDu

Part Number STH042 3/14 55* Condenser Fan Motor: The fan motor is wired through a fan cycle pressure control; therefore, it may cycle on and off.** Th

56 Part Number STH042 3/14Operational ChecksICE THICKNESS CHECKAfter a harvest cycle, inspect the ice cubes in the ice storage bin. The ice bridge con

Part Number STH042 3/14 57TroubleshootingControl Board Test ModeNOTE: The ice damper/bin switch can be open or closed and does not effect the operatio

58 Part Number STH042 3/14Diagnosing an Ice Machine that Will Not Run1. Verify primary voltage is supplied to ice machine and the fuse/circuit breaker

Part Number STH042 3/14 59Ice Machine Does Not Cycle Into Harvest when Water Loses Contact with the Harvest Float SwitchNOTE: The ice machine will mak

! WarningThis equipment contains high voltage electricity and refrigerant charge. Installation and repairs are to be performed by properly trained tec

60 Part Number STH042 3/14Step 3 Disconnect the harvest float switch wire from the control board and place a jumper on the control board harvest flo

Part Number STH042 3/14 61Ice Machine Cycles Into Harvest Before Water loses Contact with the Harvest Float SwitchStep 1 Disconnect power to the ice

62 Part Number STH042 3/14Step 2 Reapply power and press the power button to cycle the ice machine off/on and bypass the freeze time lock-in feature

Part Number STH042 3/14 63Ice Production CheckThe amount of ice a machine produces directly relates to the operating water and air temperatures. This

64 Part Number STH042 3/14Installation/Visual Inspection ChecklistIce machine is not level• Level the ice machineCondenser is dirty• Clean the condens

Part Number STH042 3/14 65Water System ChecklistA water-related problem often causes the same symptoms as a refrigeration system component malfunction

66 Part Number STH042 3/14Ice Formation PatternEvaporator ice formation pattern analysis is helpful in ice machine diagnostics.Analyzing the ice forma

Part Number STH042 3/14 67Extremely Thin at Evaporator OutletThere is no ice, or a considerable lack of ice formation on the outlet of the evaporator.

68 Part Number STH042 3/14Safety Limit FeatureIn addition to the standard safety controls, your Manitowoc ice machine features built-in safety limits

Part Number STH042 3/14 69Safety Limit 3If the freeze time reaches 4 minutes and water is not sensed (float remains down for 10 continuous seconds) th

!WarningDo not obstruct machine vents or openings.! WarningDo not store gasoline or other flammable vapors or liquids in the vicinity of this or any o

70 Part Number STH042 3/14Determining Which Safety Limit Stopped the Ice Machine: When a safety limit condition causes the ice machine to stop, the sa

Part Number STH042 3/14 71Safety Limit ChecklistThe following checklists are designed to assist the service technician in analysis. However, because t

72 Part Number STH042 3/14Refrigeration System• Non-Manitowoc components• Improper refrigerant charge• Defective compressor• TXV starving or flooding

Part Number STH042 3/14 73Safety Limit #2Harvest time exceeds 3.5 minutes for 100 Consecutive harvest cycles.Possible Cause ChecklistImproper installa

74 Part Number STH042 3/14Safety Limit 3Freeze time reaches 4 minutes and water is not sensed.Possible Cause ChecklistImproper installation• Refer to

Part Number STH042 3/14 75Analyzing Discharge Pressure 1. Determine the ice machine operating conditions:Air temp. entering condenser ______Air temp.

76 Part Number STH042 3/14Discharge Pressure High ChecklistImproper Installation• Refer to “Installation/Visual Inspection Checklist” on page 64.Restr

Part Number STH042 3/14 77Analyzing Suction Pressure The suction pressure gradually drops throughout the freeze cycle. The actual suction pressure (an

78 Part Number STH042 3/14ProcedureStep1. Determine the ice machine operating conditions.Example:Air temp. entering condenser: 90°F/32.2°CAir temp. ar

Part Number STH042 3/14 79Suction Pressure High ChecklistImproper Installation• Refer to “Installation/Visual Inspection Checklist” on page 64.Dischar

! WarningWhen using electric appliances, basic precautions must always be followed, including the following:a. Read all the instructions before using

80 Part Number STH042 3/14Suction Pressure Low ChecklistImproper Installation• Refer to “Installation/Visual Inspection Checklist” on page 64.Discharg

Part Number STH042 3/14 81Harvest ValveGeneralThe harvest valve is an electrically operated valve that opens when energized, and closes when de-energi

82 Part Number STH042 3/14Harvest Valve AnalysisThe valve can fail in two positions:• Valve will not open in the harvest cycle.• Valve remains open du

Part Number STH042 3/14 83Use the following procedure and table to help determine if a harvest valve is remaining partially open during the freeze cyc

84 Part Number STH042 3/145. Record your findings on the table.Findings CommentsThe inlet of the harvest valve is cool enough to touch and the compres

Part Number STH042 3/14 85Comparing Evaporator Inlet/Outlet TemperaturesThe temperatures of the suction lines entering and leaving the evaporator alon

86 Part Number STH042 3/14Discharge Line Temperature AnalysisGENERALKnowing if the discharge line temperature is increasing, decreasing or remaining c

Part Number STH042 3/14 87Discharge Line Temperature Above 150°F (66°C) at End of Freeze Cycle:Ice machines that are operating normally will have cons

88 Part Number STH042 3/14Refrigeration Component DiagnosticsAll electrical and water related problems must be corrected before these charts will work

Part Number STH042 3/14 89PROCEDUREStep 1 Complete each item individually in the “Operational Analysis” column. Enter check marks (✓) in the boxes.Eac

Part Number STH042 3/14 9Table of ContentsGENERAL INFORMATIONModel Numbers . . . . . . . . . . . . . . . . . . . . . 13How to Read a Model Number . .

90 Part Number STH042 3/14FINAL ANALYSISThe column with the highest number of check marks identifies the refrigeration problem.Column 1 – Harvest Valv

Part Number STH042 3/14 91Refrigeration Component Diagnostic Chart4Published 24 hour ice production ____________Calculated (actual) 24 hour ice produc

92 Part Number STH042 3/144Stops on safety limit:1If discharge pressure is High or Low, refer to freeze cycle high or low discharge pressure problem c

Part Number STH042 3/14 934The harvest valve inlet is COOLandThe compressor discharge line is HOTDischarge line temp 150°F (66°C) or higher at the end

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Part Number STH042 3/14 95Component Check ProceduresMain FuseFunctionThe control board fuse stops ice machine operation if electrical components fail

96 Part Number STH042 3/14Bin SwitchFunctionBin switch operation is controlled by the movement of the ice damper. The bin switch has two main function

Part Number STH042 3/14 97Ohm Test1. Disconnect the bin switch wires to isolate the bin switch from the control board.2. Connect an ohmmeter to the di

98 Part Number STH042 3/14Touch PadFunctionUser interface to select ice making, delay start or cleaning cycle and provides feedback on ice machine ope

Part Number STH042 3/14 99Ohm TestDisconnect wire from control board and Ohm touch pad and interconnecting wire to verify correct operation. Pressing