Manitowoc
Manitowoc Manitowoc
Ice Production CheckThe QM20/QM30 dice ice cube formation is slightly differentfrom our previous models. Manitowoc ice machines have aunique cube shape. It is normal to have a dimple in the icecube (a concave indentation in the cube). Ice cubes from theQM20/QM30 may appear to have a slightly larger dimplethan other Manitowoc ice cube machines. Therefore, cubesize for the QM20/QM30 is determined by measuring the slabweight (the combined weight of all cubes from one harvestcycle). To determine proper slab weight, follow theinstructions listed below.1. Ensure the air filter, front, and back panels are installedproperly and close the bin door.2. During the third harvest cycle open the bin door andcatch the entire slab of ice.3. Weigh the ice slab. The combined weight of all cubesfrom one harvest should weigh between 7 – 9 oz (200 – 270 g). If the slab weight is within this range, theice machine is working properly and no further action isneeded. If the slab weight is not within this range or youdesire a slightly thicker or thinner cube, continue to step4.! WarningDisconnect ele ctric p ower to th e ice machin e atthe electric switch box before proceeding.4. Remove the air filter.5. Remove the two screws holding the front panel in placeand remove the front cover.Locate the ice thickness control dial on the control board (seefigure). Turn the dial clockwise for a thicker cube or counterclockwise for a thinner cube.6. Ensure all of the panels and air filter are reinstalledproperly and the bin door is closed. Repeat steps 1 – 3.ICETHICKNESSCONTROLDIALSV1710_2138 Part Number 80-01111-9 7/10
QM45ELECTRICALThe QM45 electrical sequence of Operation andtroubleshooting is identical to the Q130/Q210/Q270.Refer to those models for electrical troubleshooting of:• Ice machine will not run• Diagnosing Ice Thickness Control Circuitry• Ice production check• Ice formation pattern• Safety limitsRefer to the following pages for refrigerationdiagnostics.Part Number 80-01111-9 7/10 139
- 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 100 and 101: DIAGNOSING ICE THICKNESS CONTROLCIR
- 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 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
- Page 150 and 151: DISCHARGE PRESSURE HIGH CHECKLISTIm
- Page 152 and 153: ProcedureStep1. Determine the ice m
- Page 154 and 155: Other• Non-Manitowoc components i
- Page 156 and 157: FindingsThe inlet of the harvestval
- Page 158 and 159: ADJUSTING CUBE WEIGHTThe cube weigh
- Page 160 and 161: Bin SwitchQM45/Q130/Q170/Q210/Q270F
- Page 162 and 163: Bin Switch Removal — QM45/Q1301.
- Page 164 and 165: Bin ThermostatQM20/QM30FunctionThe
- Page 166 and 167: SM50FunctionThe bin thermostat stop
- Page 168 and 169: Check Procedure! WarningHigh (line)
- Page 170 and 171: 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
Ice Production CheckThe QM20/QM30 dice ice cube formation is slightly differentfrom our previous models. <strong>Manitowoc</strong> ice machines have aunique cube shape. It is normal to have a dimple in the icecube (a concave indentation in the cube). Ice cubes from theQM20/QM30 may appear to have a slightly larger dimplethan other <strong>Manitowoc</strong> ice cube machines. Therefore, cubesize for the QM20/QM30 is determined by measuring the slabweight (the combined weight of all cubes from one harvestcycle). To determine proper slab weight, follow theinstructions listed below.1. Ensure the air filter, front, and back panels are installedproperly and close the bin door.2. During the third harvest cycle open the bin door andcatch the entire slab of ice.3. Weigh the ice slab. The combined weight of all cubesfrom one harvest should weigh between 7 – 9 oz (200 – 270 g). If the slab weight is within this range, theice machine is working properly and no further action isneeded. If the slab weight is not within this range or youdesire a slightly thicker or thinner cube, continue to step4.! WarningDisconnect ele ctric p ower to th e ice machin e atthe electric switch box before proceeding.4. Remove the air filter.5. Remove the two screws holding the front panel in placeand remove the front cover.Locate the ice thickness control dial on the control board (seefigure). Turn the dial clockwise for a thicker cube or counterclockwise for a thinner cube.6. Ensure all of the panels and air filter are reinstalledproperly and the bin door is closed. Repeat steps 1 – 3.ICETHICKNESSCONTROLDIALSV1710_2138 Part Number 80-01111-9 7/10