Manitowoc QD0422A Especificaciones

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

2 Part Number STH044 10/13MaintenanceManitowoc’s Cleaning Technology . . . . 26Exterior Cleaning . . . . . . . . . . . . . . . . 27Preventative Main

92 Part Number STH044 10/13Recovery/Evacuation Procedures1. Place the toggle switch in the OFF position.2. Install manifold gauge set, scale, and reco

Part Number STH044 10/13 93Charging Procedures1. Be sure the toggle switch is in the OFF position.2. Close the vacuum pump valve and the low side mani

94 Part Number STH044 10/137. Close the high side on the manifold gauge set. Add any remaining vapor charge through the suction access valve (if neces

Part Number STH044 10/13 95System Contamination Clean-UpGeneralThis section describes the basic requirements for restoring contaminated systems to rel

96 Part Number STH044 10/13Contamination Cleanup ChartSymptoms/FindingsRequired Cleanup ProcedureNo symptoms or suspicion of contaminationNormal evacu

Part Number STH044 10/13 97CLEANUP PROCEDUREMild System Contamination1. Replace any failed components.2. If the compressor is good, change the oil.3.

98 Part Number STH044 10/13Severe System Contamination1. Remove the refrigerant charge.2. Remove the compressor.3. Wipe away any burnout deposits from

Part Number STH044 10/13 999. Follow the normal evacuation procedure, except replace the evacuation step with the following:A. Pull vacuum to 1000 mic

100 Part Number STH044 10/13REPLACING PRESSURE CONTROLS WITHOUT REMOVING REFRIGERANT CHARGEThis procedure reduces repair time and cost. Use it when an

Part Number STH044 10/13 101SV1406FIG. A – PINCHING OFF TUBINGFIG. B – RE-ROUNDING TUBINGUSING PINCH-OFF TOOL

Part Number STH044 10/13 3Component Check ProceduresMain Fuse . . . . . . . . . . . . . . . . . . . . . . 73ICE/OFF/CLEAN Toggle Switch . . . . . 74

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Part Number STH044 10/13 103Component SpecificationsMAIN FUSEThe main fuse is 250 Volt, 10 amp.ICE/OFF/CLEAN TOGGLE SWITCHSingle-pole, double-throw sw

104 Part Number STH044 10/13Total System Refrigerant ChargeNOTE: All ice machines are charged using R-404A refrigerant.ImportantThis information is fo

Part Number STH044 10/13 105ChartsCycle Times/24-Hour Ice Production/ Refrigerant Pressure ChartsThese charts are used as guidelines to verify correct

106 Part Number STH044 10/13RNS012ASELF-CONTAINED AIR-COOLEDCharacteristics will vary depending on operating conditions.24-HOUR ICE PRODUCTIONAir Temp

Part Number STH044 10/13 107RNS020ASELF-CONTAINED AIR-COOLEDCharacteristics will vary depending on operating conditions.24-HOUR ICE PRODUCTIONAir Temp

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Part Number STH044 10/13 109DiagramsWiring DiagramsThe following pages contain electrical wiring diagrams. Be sure you are referring to the correct di

110 Part Number STH044 10/13RNS012/RNS020 115/60/1 & 230/50/1Refer to Nameplate for Voltage RatingTOUCH PADBLUELEDHES#1HES#2FLOATSW.TOGGLE SWITCHH

Part Number STH044 10/13 111Electronic Control BoardRNS012 - RNS020 CONTROL BOARDBLUELEDHES#1HES#2FLOATSW.TOGGLE SWITCHHALL EFFECTSWITCH ASSYICECLEANO

4 Part Number STH044 10/13Component SpecificationsMain Fuse . . . . . . . . . . . . . . . . . . . . . . 103ICE/OFF/CLEAN Toggle Switch . . . . . 103Hi

112 Part Number STH044 10/13Control Board LightsHES #1 - Green, works in conjunction with the Hall Effect Switch #1. When the ice damper is closed the

Part Number STH044 10/13 113Refrigeration Tubing SchematicRNS012 - RNS020DRIEREXPANSIONVALVEEVAPORATORHEAT EXCHANGERCOMPRESSORAIR CONDENSER

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Manitowoc Manitowoc Ice 2110 South 26th Street, P.O. Box 1720Manitowoc, WI 54221-1720, USAPh: 920-682-0161 Fax: 920-683-7589Visit us online at: www.m

Part Number STH044 10/13 5General InformationModel NumbersSelf-Contained Air-CooledRNS012A - Air-cooled lever dispense modelRNS012AT - Air-cooled touc

6 Part Number STH044 10/13ICE MACHINE WARRANTY INFORMATIONOwner Warranty Registration CardWarranty coverage begins the day the ice machine is installe

Part Number STH044 10/13 7Time and hourly rate schedules, as published from time to time by the COMPANY, apply to all service procedures. Additional e

8 Part Number STH044 10/13To secure prompt and continuing warranty service, the warranty registration card must be completed and sent to the COMPANY w

Part Number STH044 10/13 9Residential WarrantyWHAT DOES THIS LIMITED WARRANTY COVER?Subject to the exclusions and limitations below, Manitowoc Ice (“M

10 Part Number STH044 10/13WHAT ARE MANITOWOC ICE’S OBLIGATIONS UNDER THIS LIMITED WARRANTY?If a defect arises and Manitowoc receives a valid warranty

Part Number STH044 10/13 11WHAT IS NOT COVERED? This limited warranty does not cover, and you are solely responsible for the costs of: (1) periodic or

12 Part Number STH044 10/13IN NO EVENT SHALL MANITOWOC OR ANY OF ITS AFFILIATES BE LIABLE TO THE CONSUMER OR ANY OTHER PERSON FOR ANY INCIDENTAL, CONS

Part Number STH044 10/13 13InstallationLocation of Ice MachineThe location selected for the ice machine must meet the following criteria. If any of th

14 Part Number STH044 10/13Ice Machine Clearance RequirementsIce Machine Heat of RejectionIce machines, like other refrigeration equipment, reject hea

Part Number STH044 10/13 15Electrical ServiceGeneralVoltageThe maximum allowable voltage variation is ± 10% of the rated voltage on the ice machine mo

16 Part Number STH044 10/13Ice Machine Head Section Water Supply and DrainsPOTABLE WATER SUPPLYThe ice machine must be connected to a potable water s

Part Number STH044 10/13 17DRAIN CONNECTIONSFollow these guidelines when installing drain lines to prevent drain water from flowing back into the ice

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Part Number STH044 10/13 19OperationIce Making Sequence of OperationRNS012 - RNS020 NUGGET MACHINESIce Making Sequence of OperationPRIOR TO STARTUPWhe

20 Part Number STH044 10/13AUTOMATIC SHUTOFFWhen the ice damper is held open by ice, the gear motor, compressor and condenser fan de-energize. The fiv

Part Number STH044 10/13 21Control Board FeaturesFLUSH CYCLEAfter the ice machine has completed 50 hours of run time a flush sequence will start. This

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

22 Part Number STH044 10/13SEQUENCE OF OPERATION CHART Nugget MachinesSequenceContactorCoilDumpValveGearMotorIce Damper DurationInitial Start-Up The 1

Part Number STH044 10/13 23WATER LEVEL CHECKThe float valve maintains the correct water level. The water level is factory set and normally will not re

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Part Number STH044 10/13 25MaintenanceMaintenance procedures or failures due to a lack of maintenance are not covered by the warranty.Manitowoc Ice Ma

26 Part Number STH044 10/13Manitowoc’s Cleaning TechnologyManitowoc RNS012 - RNS020 Ice Machines allow the initiation and completion of a cleaning cyc

Part Number STH044 10/13 27Preventative Maintenance Cleaning ProcedurePerform this procedure as often as required for your water conditions:• Allows c

28 Part Number STH044 10/13Preventative Maintenance ProcedureIce machine cleaner is used to remove lime scale or other mineral deposits. It is not use

Part Number STH044 10/13 29Step 3 The ice machine will automatically time out a series of flush and rinse cycles, and then stops. This entire cycle

30 Part Number STH044 10/13Changing toggle switch position during clean cycle:1. Less than 60 seconds into Clean cycle - The Clean cycle will end when

Part Number STH044 10/13 31Heavily Scaled Cleaning ProcedureIce machines that are heavily scaled or have not been cleaned on a regular basis will need

NOTE: Text set off as a Note provides you with simple, but useful, extra information about the procedure you are performing.Read These Before Proceedi

32 Part Number STH044 10/13Step 1 Turn on the water supply to the ice machine. Step 2 Move the toggle switch to the ICE position. The compressor w

Part Number STH044 10/13 33Cleaning And Sanitizing ProcedureIce machines that are heavily scaled or have not been cleaned on a regular basis will need

34 Part Number STH044 10/13Step 6 Refer to chart and premix the correct solution of cleaner and cool water for your model ice machine.Step 7 Remov

Part Number STH044 10/13 35Step 17 Remove the top cover from the ice chute and pour the sanitizer/water solution into the evaporator. Add the entire

36 Part Number STH044 10/13Component Disassembly For Cleaning And SanitizingGENERAL INFORMATION1. Turn off the water supply to the ice machine at the

Part Number STH044 10/13 37Removal of Parts for Cleaning or Sanitizing 1. Turn off water supply to ice machine.2. Place toggle switch in the clean pos

38 Part Number STH044 10/136. Remove front cover.A. Lift up on front cover. B. Pull forward to disengage keyhole slots.7. Remove side panels.

Part Number STH044 10/13 398. Remove ice chute coverA. Turn the two thumbscrews 1/4 turn. B. Lift to remove cover.LOOSEN SCREWS

40 Part Number STH044 10/139. Lift out ice damper.

Part Number STH044 10/13 4110. Lift out ice strainer ramp.

! WarningRead this manual thoroughly before operating, installing or performing maintenance on the equipment. Failure to follow instructions in this m

42 Part Number STH044 10/1311. Turn ice wiper counterclockwise to remove.

Part Number STH044 10/13 4312. Loosen ice chute hose clamp.13. Disconnect ice chute drain.14. Lift up on ice chute to remove. The ice chute must be re

44 Part Number STH044 10/1315. The ice chute can be cleaned in place. If complete removal is desired use a phillips screwdriver to remove the Hall Eff

Part Number STH044 10/13 4516. Remove three thumbscrews, then remove bin cover.REMOVE THUMBSCREWS

46 Part Number STH044 10/1317. Remove agitator bar. • RNS012 - Remove the thumbscrew and lift off. • RNS020 - Unscrew the upright agitator bar.NOTE: B

Part Number STH044 10/13 4718. Remove ice deflector.A. Remove the two thumbscrews.B. Lift the ice deflector out.REMOVE THUMBSCREW

48 Part Number STH044 10/1319. Remove ice dispensing wheel by lifting straight out.

Part Number STH044 10/13 4920. Water Reservoir Cover RemovalA. Push up on cover to snap off.

50 Part Number STH044 10/13WATER DUMP VALVEThe water dump valve normally does not require removal for cleaning. To determine if removal is necessary:1

Part Number STH044 10/13 514. Remove the tubing from the dump valve by twisting the clamps off.5. Remove the valve body from mounting bracket by twist

! WarningDo not operate equipment that has been misused, abused, neglected, damaged, or altered/modified from that of original manufactured specificat

52 Part Number STH044 10/13CLEANING THE CONDENSERA dirty condenser restricts airflow, resulting in excessively high operating temperatures. This reduc

Part Number STH044 10/13 53Removal from Service/WinterizationGENERALSpecial precautions must be taken if the ice machine is to be removed from service

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Part Number STH044 10/13 55TroubleshootingSafeGuard FeatureThe ice machine will stop when conditions arise that would cause major component failure. S

56 Part Number STH044 10/13Reset Procedure1. Move the ICE/OFF/CLEAN toggle switch to OFF.A. If a safeguard feature has stopped the ice machine, it wil

Part Number STH044 10/13 57SafeGuards•No Water• No Ice ProductionNO WATERThe water sensing switch opens for more than 30 seconds.OperationWhen the flo

58 Part Number STH044 10/13NO ICE PRODUCTIONThe ice damper did not open and close at least once every 90 seconds in the freeze cycle.OPERATIONDuring t

Part Number STH044 10/13 59Reset ProcedureMove the ICE/OFF/CLEAN toggle switch from OFF to ICE or disconnect and reapply power to the ice machine.

60 Part Number STH044 10/13Ice Machine Will Not Run DiagnosticsThe following sequence describes the normal start up procedure for the ice machine when

Part Number STH044 10/13 61Power Supplied toIce Machine?Reset Control Board,Disconnect AndReconnect Line VoltagePlug In Ice Machine,Reset BreakerNOYE

! WarningIt is the responsibility of the equipment owner to perform a Personal Protective Equipment Hazard Assessment to ensure adequate protection du

62 Part Number STH044 10/13Power AtTerminals#90 & #39?Refer To High Pressure CutoutSpecifications.NONugget ControlBoardLight Energized?NOYESRepla

Part Number STH044 10/13 63Damper DoorClosed?Float Switch LightOn?Reservoir Full OfWater?NOYESNOYESNORestore Water SupplyRefer To FloatSwitch Diagnost

64 Part Number STH044 10/13HES #1 LightEnergized?Toggle Switch Functions?(If The Toggle Switch Energizes AndDe-Energizes The BLue Light, TheToggle Swi

Part Number STH044 10/13 655 Minute DelayExpired?Wait For Delay To Expire,Then Refer To SafeGuardsYESYESNoGearmotorOrCompresor Energizes?NoRefer toCom

66 Part Number STH044 10/13Refrigeration DiagnosticsBEFORE BEGINNING SERVICEIce machines may experience operational problems only during certain times

Part Number STH044 10/13 67WATER SYSTEM CHECKLISTA water-related problem could cause component misdiagnosis.Water system problems must be identified a

68 Part Number STH044 10/13ICE PRODUCTION/QUALITY CHECKQUALITY CHECKIce quality will vary with ambient and water temperatures, and is measured by the

Part Number STH044 10/13 69ANALYZING DISCHARGE PRESSURE1. Determine the ice machine operating conditions:• Air temperature entering condenser• Air tem

70 Part Number STH044 10/13Discharge Pressure Low ChecklistNOTE: Do not limit your diagnosis to only the items listed in the checklists.Problem CauseI

Part Number STH044 10/13 71ANALYZING SUCTION PRESSURENOTE: Analyze discharge pressure before analyzing suction pressure. High or low discharge pressur

72 Part Number STH044 10/13Suction Pressure Low ChecklistProblem CauseImproper installationRefer to “Installation/Visual Inspection Checklist.”Dischar

Part Number STH044 10/13 73Component Check ProceduresMAIN FUSEFUNCTIONThe control board fuse stops ice machine operation if electrical components fail

74 Part Number STH044 10/13ICE/OFF/CLEAN TOGGLE SWITCHFUNCTIONThe switch is used to place the ice machine in ICE, OFF or CLEAN mode of operation.SPECI

Part Number STH044 10/13 75FLOAT SWITCHFUNCTIONThe float switch prevents the ice machine from running when the water level is below the control setpoi

76 Part Number STH044 10/13ICE DAMPER AND HALL EFFECT SWITCHESDamper DoorFUNCTIONOpens and closes as ice passes from the ice chute to the bin. A metal

Part Number STH044 10/13 77Hall Effect Switch DiagnosticsAll diagnostics must be performed with the ice damper installed and in the closed position. T

78 Part Number STH044 10/13SWITCH FAILS CLOSEDHES#11. Reset line voltage to the ice machine2. Wait 15 minutes for delay to expire.3. HES#1 light de-en

Part Number STH044 10/13 79SELECTOR SWITCHFUNCTIONSelects product dispensed. Ice, Water or Ice and Water.CHECKDISPENSE LEVER ACTIVATEDStep 1 Verify

80 Part Number STH044 10/13TOUCHLESS SENSOR ACTIVATEDStep 1 Verify line voltage is present at control board wires #20 & #22. Note - If a blue

Part Number STH044 10/13 81Will Not Stop Dispensing• Disconnect sensor plug from sensor control board.• If the dispensing stops, replace the sensor •

Part Number STH044 10/13 1Table of ContentsGeneral InformationModel Numbers . . . . . . . . . . . . . . . . . . . . . 5Model/Serial Number Location .

82 Part Number STH044 10/13DISPENSE SWITCHFUNCTIONSupplies power to the product selector switch when activation lever is depressed.CHECK1. Inspect the

Part Number STH044 10/13 83TOUCHLESS SENSORFUNCTIONSupplies power to the product selector switch when container activates sensor.CHECKContainer must b

84 Part Number STH044 10/13HIGH PRESSURE CUTOUT CONTROLFUNCTIONStops the ice machine if subjected to excessive high-side pressure.The HPCO control is

Part Number STH044 10/13 85FAN CYCLE CONTROLFUNCTIONEnergizes and de-energizes the condenser fan motor. The fan cycle control closes on an increase, a

86 Part Number STH044 10/13LOW PRESSURE CUTOUT (LPCO) CONTROLFUNCTIONStops the ice machine if the low side pressure is too low. The LPCO control is cl

Part Number STH044 10/13 87COMPRESSOR ELECTRICAL DIAGNOSTICSThe compressor does not start or will trip repeatedly on overload.Check Resistance (Ohm) V

88 Part Number STH044 10/13Compressor Drawing Locked RotorTo determine if the compressor is seized, check the amp draw while the compressor is trying

Part Number STH044 10/13 89DIAGNOSING START COMPONENTSIf the compressor attempts to start, or hums and trips the overload protector, check the start c

90 Part Number STH044 10/13Relay Operation Check1. Disconnect wires from relay terminals.2. Verify the contacts are closed. Measure the resistance be

Part Number STH044 10/13 91Refrigerant Recovery/EvacuationNORMAL SELF-CONTAINED PROCEDURESDo not purge refrigerant to the atmosphere. Capture refriger