Manitowoc
Manitowoc Manitowoc
DIAGNOSING ICE THICKNESS CONTROLCIRCUITRYIce Machine Does Not Cycle Into Harvest whenWater Contacts the Ice Thickness Control ProbeStep 1 Bypass the freeze time lock-in feature bymoving the ON/OFF/WASH switch to OFF and back toON. Wait until the water starts to flow over theevaporator.Step 2 Clip the jumper wire to the ice thickness probeand any cabinet ground.ICE THICKNESSPROBEPROBECONNECTIONGROUNDJUMPER WIREEVAPORATORHARVEST LIGHT(RED)BIN SWITCHLIGHT(GREEN)SV1592iStep 2 Jumper wire connected from probe to groundMonitoring Harvest LightCorrectionThe harvest light comes on,and 6-10 seconds later, icemachine cycles from freezeto harvest.The harvest light comes onbut the ice machine stays inthe freeze sequence.The harvest light does notcome on.The ice thickness controlcircuitry is functioningproperly. Do not change anyparts.The ice control circuitry isfunctioning properly. The icemachine is in a six minutefreeze time lock-in. VerifyStep 1 of this procedure wasfollowed correctly.Proceed to Step 3.100 Part Number 80-01111-9 7/10
Step 3 Disconnect the ice thickness probe from thecontrol board terminal. Clip the jumper wire to theterminal on the control board and any cabinet ground.Monitor the harvest light.ICE THICKNESSPROBEPROBECONNECTIONJUMPER WIREGROUNDEVAPORATORBIN SWITCHLIGHT(GREEN)HARVEST LIGHT(RED)SV1592JStep 3 Jumper wire connected from control boardterminal to groundMonitoring Harvest LightThe harvest light comes on,and 6-10 seconds later, icemachine cycles from freezeto harvest.The harvest light comes onbut the ice machine stays inthe freeze sequence.The harvest light does notcome on.CorrectionThe ice thickness probe iscausing the malfunction.The control circuitry isfunctioning properly. Theice machine is in a sixminutefreeze time lock-in(verify step 1 of thisprocedure was followedcorrectly).The control board iscausing the malfunction.Part Number 80-01111-9 7/10 101
- Page 50 and 51: Disassembly• Twist both of the in
- Page 52 and 53: F. Remove the Float Valve• Turn t
- Page 54 and 55: H. Remove the ice damper.Q130• Gr
- Page 56 and 57: I. Remove the Bin Door• Grasp the
- Page 58 and 59: Step 12 Use 1/2 of the sanitizer/wa
- Page 60 and 61: QM20/QM30CLEANING AND SANITIZING PR
- Page 62 and 63: Step 6 Remove parts for cleaning.A.
- Page 64 and 65: Step 7 Mix a solution of cleaner an
- Page 66 and 67: Step 20 Use half of the sanitizer/w
- Page 68 and 69: 4. Wait until the Clean light flash
- Page 70 and 71: WATER SHUTTERSThe water shutter is
- Page 72 and 73: SUMP DRAIN OVERFLOW TUBE1. Remove c
- Page 74 and 75: SPRAY BAR, WATER PUMP AND HOSE! War
- Page 76 and 77: ! WarningWear ru bber gloves an d s
- Page 78 and 79: WATER-COOLED ICE MACHINES1. Perform
- Page 80 and 81: HARVEST SEQUENCE5. HarvestThe water
- Page 82 and 83: ICE MAKINGSEQUENCE OFOPERATIONHarve
- Page 84 and 85: HARVEST SEQUENCE4. Harvest CycleThe
- Page 86 and 87: SM50INITIAL START-UP OR START-UP AF
- Page 88 and 89: ENERGIZED PARTS CHARTSM50Self-conta
- Page 90 and 91: Water Level CheckThe float valve is
- Page 92 and 93: QM20/QM30Routine adjustments and ma
- Page 94 and 95: 5. Remove the two screws holding th
- Page 96 and 97: Clean (Green)Pressing the “Clean
- Page 98 and 99: This Page Intentionally Left Blank9
- Page 102 and 103: Ice Machine Cycles Into Harvest Bef
- Page 104 and 105: INSTALLATION AND VISUAL INSPECTIONC
- Page 106 and 107: ICE FORMATION PATTERNEvaporator ice
- Page 108 and 109: SAFETY LIMIT FEATUREIn addition to
- Page 110 and 111: Safety Limit Notes• A safety limi
- Page 112 and 113: Safety Limit ChecklistThe following
- Page 114 and 115: Safety Limit #2Harvest time exceeds
- Page 116 and 117: Discharge Pressure High ChecklistIm
- Page 118 and 119: ProcedureStep1. Determine the ice m
- Page 120 and 121: Suction Pressure Low ChecklistImpro
- Page 122 and 123: Hot Gas Valve AnalysisThe valve can
- Page 124 and 125: FindingsThe inlet of the harvestval
- Page 126 and 127: DISCHARGE LINE TEMPERATURE ANALYSIS
- Page 128 and 129: REFRIGERATION COMPONENT DIAGNOSTICC
- Page 130 and 131: FINAL ANALYSISThe column with the h
- Page 132 and 133: Q130/Q170/Q210/Q270 Ice Machines On
- Page 134 and 135: QM20/QM30DIAGNOSING AN ICE MACHINET
- Page 136 and 137: QM30The QM30 ice machines have a ve
- Page 138 and 139: Ice Production CheckThe QM20/QM30 d
- Page 140 and 141: REFRIGERATION DIAGNOSTICSImportant:
- Page 142 and 143: 5. Install thermometer thermocouple
- Page 144 and 145: SM50DIAGNOSING AN ICE MACHINETHAT W
- Page 146 and 147: ICE QUALITY IS POOR — CUBES ARE S
- Page 148 and 149: ICE MACHINE RUNS AND NO ICE IS PROD
DIAGNOSING ICE THICKNESS CONTROLCIRCUITRYIce Machine Does Not Cycle Into Harvest whenWater Contacts the Ice Thickness Control ProbeStep 1 Bypass the freeze time lock-in feature bymoving the ON/OFF/WASH switch to OFF and back toON. Wait until the water starts to flow over theevaporator.Step 2 Clip the jumper wire to the ice thickness probeand any cabinet ground.ICE THICKNESSPROBEPROBECONNECTIONGROUNDJUMPER WIREEVAPORATORHARVEST LIGHT(RED)BIN SWITCHLIGHT(GREEN)SV1592iStep 2 Jumper wire connected from probe to groundMonitoring Harvest LightCorrectionThe harvest light comes on,and 6-10 seconds later, icemachine cycles from freezeto harvest.The harvest light comes onbut the ice machine stays inthe freeze sequence.The harvest light does notcome on.The ice thickness controlcircuitry is functioningproperly. Do not change anyparts.The ice control circuitry isfunctioning properly. The icemachine is in a six minutefreeze time lock-in. VerifyStep 1 of this procedure wasfollowed correctly.Proceed to Step 3.100 Part Number 80-01111-9 7/10
Change language