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SM50L1CAUTION: DISCONNECT POWER BEFOREWORKING ON ELECTRICAL CIRCUITRY.NOTE: DIAGRAM SHOWN DURING THE FREEZE CYCLE.L2STARTCAPACITORCOMPRESSOR(32)S(23)(20)(33)CONTROL BOARDCRSTARTRELAY(24)TRANS.FUSE (7A)DRAINPUMP(25)HOT GASSOLENOID(26)(47)(29)(48)(42)FAN MOTORBINLIGHT(44)(45)(41)THERM-ISTOR(27)(43)BINLIGHTSWITCHBINTHERMO-STAT(46)DRAINPUMPSWITCH(28)WATER INLETDISPLAYBOARD(31)WATER PUMP(22)(21)222 Part Number 80-01111-9 7/10
Q130/Q210Tecumseh CompressorL1NOTE: DIAGRAM SHOWN DURING THE FREEZE CYCLE.SEE SERIAL PLATE FOR VOLTAGEL2 (N)(22)ONICE THICKNESSPROBEBIN SWITCH(24)OFF(23)WASHTOGGLE SWITCH(20)CONTROLBOARD(21)(10)BINSWITCHLIGHT(11)HARVESTLIGHT(2)3(3)CONTACTOR COIL21HOT GASSOLENOID(7)(6)TRANS.FUSEWATER PUMP(8)(5)(14)(4)HIGH PRES.CUTOUT(12)FAN MOTOR(AIR COOLED ONLY)(9)CONTACTORCONTACTS(15) (13)FAN CYCLE CONTROLOVERLOADPROTECTORCOMPRESSORRCSSTARTINGDEVICEPart Number 80-01111-9 7/10 223
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ManitowocQM20/QM30/QM45SM50Q130/Q17
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Read These Before Proceeding:! Caut
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Cleaning the Condenser . . . . . .
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Freeze Cycle Is Long, Low Ice Produ
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CHARTSCycle Times, 24 Hr. Ice Produ
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How to Read a Model NumberCube Size
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Model/Serial Number LocationThe mod
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SM50MODEL/SERIALNUMBER PLATE16 Part
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LaborQ130/Q170/Q210/Q2701. Labor re
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RESIDENTIAL WARRANTY COVERAGEWhat D
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How State Law AppliesThis limited w
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Ice Machine Clearance RequirementsS
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SM50/QM20/QM30After moving the ice
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Electrical SpecificationsQ130/Q170/
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QM20/QM30/QM45 Air-cooled Ice Machi
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COOLING TOWER APPLICATIONSWater Coo
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QM20/QM30LocationIce MakingWater In
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This Page Intentionally Left Blank3
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ON/OFF/WASHTOGGLESWITCHCONDENSER AI
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ON/OFF/WASHTOGGLESWITCHQM20 Ice Mac
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WATERPUMPEVAPORATORWATERSHUTTERASSE
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AIR-COOLED CONDENSERA dirty condens
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Step 1 Set the toggle switch to the
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D. Remove the Ice Thickness Probe
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Disassembly• Twist both of the in
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F. Remove the Float Valve• Turn t
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H. Remove the ice damper.Q130• Gr
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I. Remove the Bin Door• Grasp the
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Step 12 Use 1/2 of the sanitizer/wa
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QM20/QM30CLEANING AND SANITIZING PR
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Step 6 Remove parts for cleaning.A.
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Step 7 Mix a solution of cleaner an
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Step 20 Use half of the sanitizer/w
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4. Wait until the Clean light flash
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WATER SHUTTERSThe water shutter is
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SUMP DRAIN OVERFLOW TUBE1. Remove c
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SPRAY BAR, WATER PUMP AND HOSE! War
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! WarningWear ru bber gloves an d s
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WATER-COOLED ICE MACHINES1. Perform
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HARVEST SEQUENCE5. HarvestThe water
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ICE MAKINGSEQUENCE OFOPERATIONHarve
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HARVEST SEQUENCE4. Harvest CycleThe
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SM50INITIAL START-UP OR START-UP AF
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ENERGIZED PARTS CHARTSM50Self-conta
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Water Level CheckThe float valve is
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QM20/QM30Routine adjustments and ma
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5. Remove the two screws holding th
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Clean (Green)Pressing the “Clean
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This Page Intentionally Left Blank9
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DIAGNOSING ICE THICKNESS CONTROLCIR
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Ice Machine Cycles Into Harvest Bef
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INSTALLATION AND VISUAL INSPECTIONC
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ICE FORMATION PATTERNEvaporator ice
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SAFETY LIMIT FEATUREIn addition to
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Safety Limit Notes• A safety limi
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Safety Limit ChecklistThe following
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Safety Limit #2Harvest time exceeds
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Discharge Pressure High ChecklistIm
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ProcedureStep1. Determine the ice m
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Suction Pressure Low ChecklistImpro
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Hot Gas Valve AnalysisThe valve can
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FindingsThe inlet of the harvestval
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DISCHARGE LINE TEMPERATURE ANALYSIS
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REFRIGERATION COMPONENT DIAGNOSTICC
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FINAL ANALYSISThe column with the h
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Q130/Q170/Q210/Q270 Ice Machines On
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QM20/QM30DIAGNOSING AN ICE MACHINET
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QM30The QM30 ice machines have a ve
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Ice Production CheckThe QM20/QM30 d
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REFRIGERATION DIAGNOSTICSImportant:
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5. Install thermometer thermocouple
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SM50DIAGNOSING AN ICE MACHINETHAT W
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ICE QUALITY IS POOR — CUBES ARE S
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ICE MACHINE RUNS AND NO ICE IS PROD
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DISCHARGE PRESSURE HIGH CHECKLISTIm
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ProcedureStep1. Determine the ice m
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Other• Non-Manitowoc components i
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FindingsThe inlet of the harvestval
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ADJUSTING CUBE WEIGHTThe cube weigh
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Bin SwitchQM45/Q130/Q170/Q210/Q270F
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Bin Switch Removal — QM45/Q1301.
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Bin ThermostatQM20/QM30FunctionThe
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SM50FunctionThe bin thermostat stop
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Check Procedure! WarningHigh (line)
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Temperature/Resistance ChartAs the
Page 172 and 173: ON/OFF/WASH Toggle SwitchFUNCTIONTh
Page 174 and 175: Ice Thickness ProbeQM45/Q130/Q170/Q
Page 176 and 177: Compressor Electrical DiagnosticsTh
Page 178 and 179: Fan Cycle ControlQM45/Q130/Q170/Q21
Page 180 and 181: Filter-DriersLIQUID LINE FILTER DRI
Page 182 and 183: REFRIGERANT RE-USE POLICYManitowoc
Page 184 and 185: RECOVERY AND RECHARGING PROCEDURESQ
Page 186 and 187: NOTE: Manifold gauges must be remov
Page 188 and 189: ImportantManifold gau ges must be r
Page 190 and 191: System Contamination CleanupGENERAL
Page 192 and 193: MILD SYSTEM CONTAMINATION CLEANUPPR
Page 194 and 195: REPLACING PRESSURE CONTROLS WITHOUT
Page 196 and 197: Q270 Condenser Fan Motor Replacemen
Page 198 and 199: MAX. 1300°F(700°C)SV30714. Apply
Page 200 and 201: High Pressure Cutout (HPCO) Control
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Page 204 and 205: QM20 SELF-CONTAINED AIR-COOLEDNOTE:
Page 206 and 207: QM45 SELF-CONTAINED AIR-COOLEDNOTE:
Page 208 and 209: SM50 SELF-CONTAINED AIR-COOLEDNOTE:
Page 210 and 211: Q130 SELF-CONTAINED AIR-COOLED(Afte
Page 212 and 213: Q170 SELF-CONTAINED AIR-COOLEDNOTE:
Page 214 and 215: Q210 SELF-CONTAINED WATER-COOLEDNOT
Page 216 and 217: Q270 SELF-CONTAINED WATER-COOLEDNOT
Page 218 and 219: QM20CAUTION: DISCONNECT POWER BEFOR
Page 220 and 221: QM30230V/1 Ph/50 HzL1CAUTION: DISCO
Page 224 and 225: Q130/Q170/Q210Danfoss CompressorL1N
Page 226 and 227: Q270Danfoss CompressorL1NOTE: DIAGR
Page 228 and 229: QM45/Q130/Q170/Q210/Q270ICE THICKNE
Page 230 and 231: Tubing SchematicsQM20/QM30 Tubing S
Page 232 and 233: SM50 Tubing SchematicHEATEXCHANGERE
Page 234: This Page Intentionally Left Blank2
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