Manitowoc SM050

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Part Number 8001119 10/19 227

Electronic Control Boards

QM20/QM30

-5

-4

LIQUID LINE

THERMISTOR

CONNECTION

ICE BRIDGE

THICKNESS

CONTROL

POWER

LIGHT

8 AMP FUSE

Main Page

Table of Contents5
General Information11
Model Numbers11
How to Read a Model Number12
Accessories12
Bin Caster12
Manitowoc Cleaner and Sanitizer12
Model/Serial Number Location14
Q130/Q170/Q210/Q27014
Qm20/Qm3015
Qm4515
Ice Machine Warranty Information17
Owner Warranty Registration Card17
Commercial Warranty Coverage17
Residential Warranty Coverage20
Installation23
Location of Ice Machine23
Ice Machine Clearance Requirements24
Ice Machine Heat of Rejection24
Leveling the Ice Machine25
Qm45/Q130/Q170/Q210/Q27025
Sm50/Qm20/Qm3026
Electrical Requirements27
Voltage27
Electrical Specifications28
Water Service/Drains31
Water Supply31
Water Inlet Lines31
Drain Connections31
Cooling Tower Applications32
Component Identification37
Qm45/Q130/Q170/Q210/Q27037
Qm20/Qm3039
Sm5041
Ice Machine Inspection43
Exterior Cleaning43
Cleaning the Condenser43
Air-Cooled Condenser44
Water-Cooled Condenser and Water Regulating Valve44
Qm45/Q130/Q170/Q210/Q27045
Interior Cleaning and Sanitizing45
Qm20/Qm3060
Cleaning and Sanitizing Procedure60
Sm5067
Cleaning Procedure67
Sanitizing Procedure68
Removal of Parts for Cleaning and Sanitizing69
Removal from Service/Winterization77
General77
Self-Contained Air-Cooled Ice Machines77
Water-Cooled Ice Machines78
Operation79
Qm45/Q130/Q170/Q210/Q27079
Initial Start-Up or Start-Up after Automatic Shut-Off79
Freeze Sequence79
Harvest Sequence80
Automatic Shut-Off80
Energized Parts Chart81
Qm20/Qm3083
Initial Start-Up or Start-Up after Automatic Shut-Off83
Freeze Sequence83
Harvest Sequence84
Automatic Shut-Off84
Energized Parts Chart85
Sm5086
Initial Start-Up or Start-Up after Automatic Shut-Off86
Energized Parts Chart88
Operational Checks89
Qm45/Q130/Q170/Q210/Q27089
Qm20/Qm3092
Sm5095
Delay Start96
Repeat Delay Period Every 24 Hours96
Troubleshooting99
Qm45/Q130/Q170/Q210/Q27099
Diagnosing an Ice Machine99
That will Not Run99
Diagnosing Ice Thickness Control Circuitry100
Ice Production Check103
Installation and Visual Inspection Checklist104
Water System Checklist105
Ice Formation Pattern106
Safety Limit Feature108
Analyzing Discharge Pressure115
Analyzing Suction Pressure117
Hot Gas Valve121
Comparing Evaporator Inlet/Outlet Temperatures125
Discharge Line Temperature Analysis126
Refrigeration Component Diagnostic Chart128
Final Analysis130
Refrigeration Component Diagnostic Chart131
Qm20/Qm30134
Diagnosing an Ice Machine that will Not Run134
Refrigeration Diagnostics135
Ice Formation Pattern137
Qm45139
Electrical139
Refrigeration Diagnostics140
Flooding Expansion Valve143
Starving Expansion Valve/Low Refrigerant Charge143
Overcharged System143
Sm50144
Diagnosing an Ice Machine that will Not Run144
Ice Machine will Not Harvest145
Ice Quality Is Poor - Cubes Are Shallow, Incomplete or White146
Freeze Cycle Is Long, Low Ice Production147
Ice Machine Runs and no Ice Is Produced148
Analyzing Discharge Pressure149
Discharge Pressure High Checklist150
Freeze Cycle Discharge Pressure Low Checklist150
Analyzing Suction Pressure151
Hot Gas Valve154
Component Check Procedures159
Main Fuse159
Function159
Specifications159
Check Procedure159
Bin Switch160
Qm45/Q130/Q170/Q210/Q270160
Bin Thermostat164
Qm20/Qm30164
Sm50166
Liquid Line Thermistor169
Qm20/Qm30/Sm50169
Diagnosing Start Components171
Capacitor171
Relay171
ON/OFF/WASH Toggle Switch172
Function172
Specifications172
Check Procedure172
Qm45/Q130/Q170/Q210/Q270173
Qm20/Qm30173
Ice Thickness Probe174
Qm45/Q130/Q170/Q210/Q270174
Ice Thickness Check175
Compressor Electrical Diagnostics176
Check Resistance (Ohm) Values176
Single Phase Compressors176
Check Motor Windings to Ground176
Compressor Drawing Locked Rotor177
Compressor Drawing High Amps177
Fan Cycle Control178
Qm45/Q130/Q170/Q210/Q270178
High Pressure Cutout (HPCO) Control179
Qm45/Q130/Q170/Q210/Q270179
Filter-Driers180
Liquid Line Filter Drier180
Refrigerant Recovery/Evacuation181
Definitions181
Refrigerant Re-Use Policy182
Recovery and Recharging Procedures184
System Contamination Cleanup190
General190
Determining Severity of Contamination190
Mild System Contamination Cleanup Procedure192
Severe System Contamination Cleanup Procedure193
Replacing Pressure Controls Without Removing Refrigerant Charge194
Q270 Condenser Fan Motor Replacement196
Brazing Procedures for Danfoss Valves197
Component Specifications199
Main Fuse199
Bin Switch199
Qm45/Q130/Q170/Q210/Q270199
Bin Thermostat199
Qm20/Qm30/Sm50199
ON/OFF/WASH Toggle Switch199
Fan Control Cycle199
High Pressure Cutout (HPCO) Control200
Filter-Driers200
Liquid Line Thermistor200
Qm20/Qm30/Sm50200
Total System Refrigerant Charge201
Cycle Times, 24 Hr. Ice Production and Refrigerant Pressure Charts203
QM20 Self-Contained Air-Cooled204
QM30 Self-Contained Air-Cooled205
QM45 Self-Contained Air-Cooled206
QM45 Operating Temperatures207
SM50 Self-Contained Air-Cooled208
Q130 Self-Contained Air-Cooled209
(Before Serial Number 310047287)209
Q130 Self-Contained Air-Cooled210
(After Serial Number 310047287)210
Q130 Self-Contained Water-Cooled211
Q170 Self-Contained Air-Cooled212
Q210 Self-Contained Air-Cooled213
Q210 Self-Contained Water-Cooled214
Q270 Self-Contained Air-Cooled215
Q270 Self-Contained Water-Cooled216
Wiring Diagrams217
Qm20218
Qm30219
Qm30220
Qm45221
Sm50222
Q130/Q210223
Q130/Q170/Q210224
Q270225
Q270226
Electronic Control Boards227
Tubing Schematics230

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