Scotsman CU50PA1C - User Manual

CU50
Service Manual
March 2010
Page 1
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.
Table of Contents
Specications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Page 2
Cabinet Layout . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .Page 3
Air ow . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Page 4
Water Quality . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .Page 5
Door swing change . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .Page 6
Installation Notes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .Page 7
Installation: Water & Drain . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Page 8
Gravity Drain. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Page 9
Electrical . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Page 10
Cube Size Adjustment . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Page 11
Harvest Time Adjustment . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .Page 12
Control Settings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Page 13
Use . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .Page 14
How to clean the condenser and winterize. . . . . . . . . . . . . . . . . . . . . . . . . . . . . Page 15
How to remove scale from the ice making system. . . . . . . . . . . . . . . . . . . . . . . . . Page 16
System Information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .Page 17
Water System . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Page 18
Components . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Page 19
Controller . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .Page 20
Performance Information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .Page 21
Refrigeration System . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .Page 22
Thermistor Values . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Page 23
Service Diagnosis . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Page 24
Service Diagnosis . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Page 25
Removal and Repair . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Page 26
Removal and Repair . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Page 27
Removal and Repair - Cabinet Removal . . . . . . . . . . . . . . . . . . . . . . . . . . . . .Page 28
Refrigeration Service . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .Page 30

Summary

Introduction

Specifications

Options

Describes optional accessories and kits for the ice machine.

Drain Conversion

Explains converting a gravity drain model to a drain pump model.

Warranty Information

Outlines the general warranty coverage details for the ice machine.

Cabinet Layout

Air Flow

Water Quality

Filters and Treatment

Recommends water filtration and treatment methods to improve ice quality and machine longevity.

RO Water

Details the requirements and considerations for using Reverse Osmosis water.

Door Swing Change

Installation Notes

Installation: Water & Drain

Drain Pump Model Drain Installation

Step-by-step guide for installing the drain tubing on a pump model ice machine.

Gravity Drain Installation

Electrical

Initial Start Up

Guides through the first-time startup procedure after installation and connection.

Cube Size Adjustment

Harvest Time Adjustment

Control Settings

Automatic Water Purge Enable; Disable

How to enable or disable the automatic water purge feature on the ice machine.

Manual Harvest

Procedure for manually initiating the harvest cycle from the control panel.

Reset Time to Clean Indicator Light

Instructions for resetting the 'Time to Clean' indicator light on the control panel.

Use

Maintenance

How to Clean the Cabinet

Steps for cleaning the exterior cabinet and door of the ice machine.

How to Clean the Ice Storage Bin

Method for sanitizing the ice storage bin using a cleaning solution.

How to Clean the Condenser and Winterize

Condenser Cleaning

Steps to clean dust and lint from the condenser fins to ensure proper operation.

Winterizing

Detailed steps for preparing the ice machine for storage or periods of non-use.

How to Remove Scale from the Ice Making System

System Information

Electrical Sequence

Explains the sequence of electrical operations during the ice making cycle.

Bin Control

Details how the bin thermostat regulates machine operation based on ice level.

Water System

Reservoir Water Dilution

Describes how the machine dilutes reservoir water to prevent mineral buildup and scale.

Components

Controller

Maximum Freeze Time

Specifies the maximum duration allowed for the freeze cycle.

Maximum Harvest Time

Specifies the maximum duration allowed for the harvest cycle.

Time Between Restarts

Defines the delay period before the machine restarts after being turned off.

Performance Information

Refrigeration System

Thermistor Values

Service Diagnosis

No Ice

Lists potential causes and solutions when no ice is produced by the machine.

Very Long Freeze Cycle

Addresses issues causing extended freeze cycles and their respective solutions.

Cannot Make Ice

Details problems that prevent ice production and their resolutions.

Troubleshooting Common Issues

Makes Excessive Noise

Diagnoses causes of unusual noise during operation.

Makes Ice, Does Not Harvest

Troubleshoots issues where ice is made but not harvested.

Makes Poor Quality Ice

Identifies causes of poor quality ice and solutions.

Makes Ice, But Melts Rapidly

Addresses situations where ice melts quickly after harvesting.

Membrane Switch Diagnostics

Explains how to test the membrane switch functionality.

Removal and Repair

Bin Thermostat

Steps to remove and reinstall the bin thermostat.

Inlet Water Solenoid Valve

Instructions for removing and replacing the inlet water solenoid valve.

Curtain

Procedure to remove and reinstall the curtain.

Spray Platform

Steps to remove and reinstall the spray platform.

Water Pump

Instructions for removing and replacing the water pump.

Evaporator Thermistor

Procedures for removing and replacing the evaporator thermistor.

Transformer

Steps for removing and replacing the transformer.

Controller

Instructions for removing and replacing the electronic controller.

Control Panel

Procedure to remove and reinstall the control panel.

Cabinet Removal Procedure

Refrigeration Service

Bin Thermostat Altitude Adjustment Screw

Details how to adjust the bin thermostat based on altitude for optimal performance.

Scotsman CU50PA1C Specifications

General

Brand	Scotsman
Model	CU50PA1C
Category	Ice Maker
Language	English