Manitowoc Q270 - Page 120

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Manitowoc Ice

2110 South 26th Street, P.O. Box 1720

Manitowoc, WI 54221-1720, USA

Ph: 001-920-682-0161 Fax: 001-920-683-7589

Visit us online at: www.manitowocfsg.com

Part Number STH039 8/13

Main Page

Safety Notices2
Table of Contents9
General Information13
- Model Numbers13
- How to Read a Model Number14
- Model/Serial Number Location15
- Ice Machine Warranty Information16
Installation21
- Location of Ice Machine21
- Ice Machine Clearance Requirements22
- Ice Machine Heat of Rejection22
- Leveling the Ice Machine23
- Electrical Requirements24
Component Identification25
- Evaporator Compartment26
- Q270 Ice Machines27
Maintenance29
Ice Machine Inspection29
- Exterior Cleaning29
- Cleaning the Condenser30
- Air-Cooled Condenser30
- Interior Cleaning and Sanitizing32
- Removal from Service/Winterization45
- Operation47
- Initial Start-Up or Start-Up after Automatic Shut-Off47
- Freeze Sequence47
- Harvest Sequence48
- Automatic Shut-Off48
- Energized Parts Chart49
- Operational Checks51
Troubleshooting55
Ice Machine will Not Run55
Diagnosing Ice Thickness Control Circuitry56
Ice Production Check59
Installation and Visual Inspection Checklist60
Water System Checklist61
Ice Formation Pattern62
Safety Limit Feature64
Analyzing Discharge Line Temperature70
Analyzing Suction Temperature72
Hot Gas Valve77
Comparing Evaporator Inlet/Outlet Temperatures81
Discharge Line Temperature Analysis82
Refrigeration Component Diagnostic Chart84
Final Analysis86
Refrigeration Component Diagnostic Chart87
Component Check Procedures91
- Main Fuse91
- Bin Switch92
- Diagnosing Start Components95
  - Capacitor95
  - Relay95
- ON/OFF/WASH Toggle Switch96
- Ice Thickness Probe97
  - Ice Thickness Check98
- Compressor Electrical Diagnostics99
- Fan Cycle Control101
- High Pressure Cutout (HPCO) Control102
- Liquid Line Filter-Driers103
- Refrigerant Recovery/Evacuation104
  - Recovery and Recharging Procedures104
- Q270 Condenser Fan Motor Replacement105
- Component Specifications107
- Main Fuse107
- Bin Switch107
- ON/OFF/WASH Toggle Switch107
- Fan Control Cycle107
- High Pressure Cutout (HPCO) Control108
- Total System Refrigerant Charge108
Cycle Times, 24 Hr. Ice Production and Refrigerant Temperature Charts109
- Q210 Self-Contained Air-Cooled110
- Q270 Self-Contained Air-Cooled111
Wiring Diagrams113
- Q210114
- Q270115
Electronic Control Boards116
Tubing Schematic117

Manitowoc Q270 - Page 120

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