Manitowoc
Manitowoc Manitowoc
REFRIGERATION DIAGNOSTICSImportant:• DO NOT install a manifold gauge set on the icemachine! Refrigerant pressures are not used todiagnose this ice machine.• If the ice machine is “slushing” remove the screenfrom the bottom of the water pump.• Normal Ice Fill Pattern is less fill on the left side ofthe evaporator. This occurs because therefrigeration tubing exits the evaporator on the leftside.OUTLETINLETQM45Evaporator Tubing RoutingProcedure1. Remove siphon cap from siphon tube and verifythat the water level is between 1/4 and 3/8 inch(6.4 – 9.5 mm) from the top of the standpipe, aline in the water trough indicates the correct level.SET THE WATER LEVEL TO THELINE IN THE WATER TROUGHSIPHONCAPSV1689-22. Verify that the incoming water pressure is morethan 20 psi and less than 80 psi.140 Part Number 80-01111-9 7/10
3. Verify that the ice thickness probe is properlyadjusted.ADJUSTINGSCREW1/8" ICE BRIDGETHICKNESSSV3114SV3113Ice Thickness Adjustment4. Verify that the machine has properly sized drainline leaving the machine and that the bin drain isnot restricted. Refer to “Drain Connections” onpage 31 for installation details.BIN DRAIN5/8" I.D.(1.59 MM)SV1735Part Number 80-01111-9 7/10 141
- 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 138 and 139: Ice Production CheckThe QM20/QM30 d
- 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
- Page 188 and 189: ImportantManifold gau ges must be r
3. Verify that the ice thickness probe is properlyadjusted.ADJUSTINGSCREW1/8" ICE BRIDGETHICKNESSSV3114SV3113Ice Thickness Adjustment4. Verify that the machine has properly sized drainline leaving the machine and that the bin drain isnot restricted. Refer to “Drain Connections” onpage 31 for installation details.BIN DRAIN5/8" I.D.(1.59 MM)SV1735Part Number 80-01111-9 7/10 141
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