Scotsman CU50 - Manual

This Service Manual provides comprehensive guidance for maintaining, repairing, and troubleshooting an ice-making unit, covering everything from installation and electrical setup to advanced diagnostics. The document details specifications, including operational limits for temperature, pressure, and power requirements, alongside diagrams of cabinet layouts, airflow systems, and internal components like the control panel, evaporator, and condenser. It also includes detailed instructions for adjusting settings–such as ice cube size, harvest time, and water purge–to optimize performance. Installation procedures are thoroughly outlined, including water and drain system connections, electrical wiring, and winterization steps to prevent damage in cold climates. Maintenance routines address cleaning, mineral scale removal, and sanitizing the storage bin, while troubleshooting guides identify common issues like no ice production or poor quality and offer solutions. Repair instructions cover disassembly of key components such as the water pump, solenoid valve, thermistors, and controller, emphasizing safety protocols for electrical work.

Page 1 – Manual Introduction and Table of Contents
Page 2 – Machine Specifications and Options
Page 3 – Cabinet Layout and Dimensions
Page 4 – Air Flow System and Component Diagrams
Page 5 – Water Quality Requirements for Installation
Page 6 – Door Assembly Instructions
Page 7 – Installation Notes and Leveling
Page 8 – Water Supply and Drain System Installation
Page 9 – Gravity Drain System Installation
Page 10 – Electrical Installation and Startup Procedures
Page 11 – Adjusting Ice Cube Size
Page 12 – Adjusting Ice Harvest Time
Page 13 – Control Setting Adjustments
Page 14 – Basic Operation, Maintenance, and Cleaning
Page 15 – Condenser Cleaning and Winterization
Page 16 – Mineral Scale Removal Procedure
Page 17 – System Specifications and Electrical Sequence
Page 18 – Water System Operation and Dilution
Page 19 – Internal Component Illustration
Page 20 – Controller Components and Safety Features
Page 21 – Performance Data
Page 22 – Refrigeration System Pressure Trends
Page 23 – Thermistor Resistance Reference Table
Page 24 – Troubleshooting: No Ice Issues
Page 25 – Troubleshooting Common Ice Maker Problems
Page 26 – Component Removal and Repair Procedures
Page 27 – Controller and Thermistor Servicing
Page 28 – Cabinet Disassembly Procedure
Page 29 – Freezer Compartment Disassembly
Page 30 – Refrigeration System Service Procedures

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Introduction:

This ice machine is the result of Scotsman ’s
decades of experience as an industry leader in the
design and manufacture of both commercial and
residential ice machines.

This manual includes the information needed to
install, start up, maintain and service the ice
machine. Note any Caution or Warning indicators,
as they provide notice of potential hazards. Keep
this manual for future reference.

March 2010

Page 1

CU50
Service Manual

Table of Contents

Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Page 2

Cabinet Layout . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Page 3

Air flow

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Page 4

Water Quality . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Page 5

Door Covering . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Page 6

Door Panel Attachment . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Page 7

Custom Panel . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Page 8

Door swing change . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Page 9

Installation: Water & Drain

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Page 10

Gravity Drain

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Page 11

Electrical

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Page 12

Cube Size Adjustment

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Page 13

Harvest Time Adjustment . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Page 14

Control Settings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Page 15

Use . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Page 16

How to clean the condenser and winterize. . . . . . . . . . . . . . . . . . . . . . . . . . . . Page 17

How to remove scale from the ice making system. . . . . . . . . . . . . . . . . . . . . . . . Page 18

System Information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Page 19

Water System . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Page 20

Components

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Page 21

Controller . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Page 22

Performance Information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Page 23

Refrigeration System . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Page 24

Thermistor Values . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Page 25

Service Diagnosis . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Page 26

Service Diagnosis . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Page 27

Removal and Repair

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Page 28

Removal and Repair

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Page 29

Removal and Repair - Cabinet Removal . . . . . . . . . . . . . . . . . . . . . . . . . . . . Page 30

Refrigeration Service . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Page 32

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About this manual

Brand: Scotsman
Model: CU50
Document type: Manual
Language(s): English
Pages: 30
File size: 847.5 KB
Format: PDF

Summary

Page 1 - Manual Introduction and Table of Contents

Introduction and table of contents detailing sections on installation, startup, maintenance, servicing, specifications, electrical systems, control settings, cleaning procedures, system components, performance data, and service diagnosis.

Page 2 - Machine Specifications and Options

Operational limits for air and water temperature, water pressure, electrical requirements, voltage limits, available options like kickplate extensions, cabinet stability kits, drain conversion kits, and warranty information. Identifies models CU50PA-1 and CU50GA-1.

Page 3 - Cabinet Layout and Dimensions

Technical diagrams and labeled dimensions for various components and mounting points of the cabinet layout.