Sub-Zero UC-15I Service Manual

MODEL
MODEL
UC-15I
UC-15I
(Undercounter Ice Machine)
(Undercounter Ice Machine)
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© SUB-ZERO INC. 2009 ALL RIGHTS RESERVED JOB AID #7012423 (Revision A. - October, 2009)

Sub-Zero UC-15I Specifications

General

Type	Undercounter Ice Maker
Width	15 inches
Ice Storage Capacity	25 lbs
Finish	Stainless Steel
Door Style	Solid
Water Filter	Yes
Drain Required	Yes
Voltage	115 V
Refrigerant	R-134A
Height	34 inches
Depth	24 in
Ice Production	50 lbs per day
Ice Cube Type	Clear
Water Connection	1/4" OD copper tubing
Water Supply	Direct water line required

Summary

Section 1 General Information

Introduction

Overview of the manual's purpose and scope for service technicians.

Important Safety Information

Details on product safety labels and signal words (WARNING, CAUTION).

Technical Assistance

Contact information for Sub-Zero customer and technical support.

Warranty Information

Summaries of 2, 5, and 12-year warranties for Sub-Zero appliances.

Serial Number Tag Information

Location and details of the unit's serial number tag for identification.

Model Description

Overview of the UC-151 model features and its integrated design.

Components / Features

Visual identification of major parts and features of the UC-151 ice machine.

Section 2 Installation Information

Pre-Installation Considerations

Key factors to address before installing the ice machine for proper operation.

Location of the Ice Machine

Criteria for selecting an appropriate installation site for the ice machine.

Area Requirements

Specifications for the installation space, including finished opening dimensions.

Electrical Requirements

Details on proper grounding, wiring, and circuit protection for the ice machine.

Plumbing Requirements

Guidelines for water supply, drain connections, and filter installation.

Water Supply and Drain Line Sizing / Connections

Technical specifications for water inlet and drain line sizing and fittings.

Installation Procedure

Step-by-step guide for installing the UC-151 ice machine.

Leveling

Instructions for adjusting the unit's leveling legs for proper stability and door seal.

Secure the Ice Machine

Steps to physically secure the ice machine to cabinets using screws.

Reversing the Door Swing

Procedure for changing the door hinge from right to left side.

Door Panel Installation

Guidelines for installing a custom decorative door panel onto the unit.

Panel Preparation and Installation

Steps for preparing and attaching the door panel, including hardware.

90-Degree Door Stop Installation

How to install a pin to limit door opening to 90 degrees.

Hinge Cover Installation

Procedure for installing protective covers over the door hinges.

Section 3 Theory of Operation

Control Panel

Explanation of the functions of buttons and indicator lights on the control panel.

Operating Systems

Overview of the three main systems: Refrigeration, Water, and Electrical.

Refrigeration System

Detailed explanation of refrigerant flow and component functions.

Water System

Description of how water is supplied, recirculated, and drained for ice production.

Electrical (Electronic Control) System

How power is supplied and regulated by the electronic control system.

Sequence of Operation

Table outlining the operational events and component energization.

Initial Start-up / Start-up after Automatic Shut-off

Initial power-on sequence and its purpose for system preparation.

Refrigeration System Start-up

Explanation of component energization during the initial refrigeration system start-up.

Freeze (Ice Making) Cycle

Detailed description of the ice production process and component operation.

Harvest Cycle

Process of releasing ice cubes from molds and falling into the bin.

Automatic Shut-off

How the ice machine stops production when the ice bin is full.

What to Expect from the Model UC-151

Information on ice appearance, bin storage, and typical run times.

Testing and Adjusting the Bin Thermostat

Procedure to test and adjust the bin thermostat for proper ice level control.

Cube Weight Adjustment

Method to adjust freeze cycle finish time to control cube weight.

Section 4 Maintenance, Cleaning, and Adjustment

Ice Maker Cleaning & Maintenance

Recommendations for regular cleaning to maintain reliability and performance.

Recommended Cleaning / Maintenance Schedule

A schedule outlining weekly, semi-annual, and start-up maintenance tasks.

Cleaning the Exterior

Instructions for cleaning the unit's outer surfaces, including stainless steel.

Cleaning the Condenser

Procedure for cleaning the condenser coil located behind the kickplate.

Cleaning and Sanitizing the Interior

Steps for semi-annual in-place cleaning and sanitizing of the ice machine interior.

In Place Cleaning / Sanitizing

Detailed procedure for cleaning and sanitizing without full disassembly.

Disassembly Cleaning / Sanitizing

Procedure for thorough cleaning and sanitizing requiring component disassembly.

Removal of Parts for Cleaning and Sanitizing

Steps to remove parts like covers, chutes, and pumps for thorough cleaning.

Top Cover Removal

Instructions for removing the top panel of the ice machine.

Splash Shield Removal

Procedure to remove the splash shield located near the control box.

Water Shutter Assembly Removal

How to remove the assembly that directs water to the evaporator.

Ice Chute Removal

Steps to remove the chute that guides ice into the storage bin.

Water Trough Drain Tube and Standpipe/Overflow Tube Removal

Procedure for removing the drain and overflow plumbing.

Water Trough Removal

Steps to remove the component that holds water for ice making.

Spray Bar Assembly Removal and Disassembly

How to remove and disassemble the spray bar for cleaning.

Water Pump Removal

Procedure for removing the unit's water pump.

Removal from Service/ Long Term Storage / Winterization

Precautions for preparing the unit for extended periods without use.

Water Filter Replacement

Step-by-step guide to replace the water filter.

Adjustments

Overview of adjustable settings for the ice machine.

Cube Weight Check and Adjustment

How to check and adjust cube weight by modifying freeze cycle time.

Testing and Adjusting Bin Thermostat

Procedure to test and adjust the bin thermostat for proper ice level control.

Section 5 Component Access and Removal

Component Access and Removal Overview

Explains how to access and remove cosmetic, mechanical, and sealed system components.

Exterior Components

Procedures for accessing and removing external parts of the ice machine.

Kickplate Removal

Steps to remove the front kickplate for access to internal components.

Door Panel Removal

Instructions for removing the decorative door panel.

Door Panel Mounting Brackets and Door Hinge Cover Removal

How to remove panel brackets and hinge covers.

Door Gasket Removal

Procedure for removing the door gasket from the liner.

Door Assembly Removal

Steps to detach the entire door from the unit.

Hinge Assembly Removal

Procedure for removing the door hinge components.

Trim Plate / Slide Cover Bracket Removal

How to remove the trim plate and associated bracket.

Water Filter Panel Removal

Steps to remove the panel covering the water filter.

Top Cover Removal

Procedure for removing the main top cover of the unit.

Upper Back Panel Removal

How to remove the upper rear access panel.

Lower Back Utility Panel Removal

Steps to remove the lower rear panel providing access to utilities.

Power Cord Removal

Procedure for safely removing the unit's power cord.

Front Top Rail Removal

Steps to remove the front trim piece at the top of the unit.

Components Below Top Cover

Accessing components like control box, water shutter, and splash shield.

Splash Shield Removal

Procedure to remove the splash shield located near the control box.

Water Shutter Assembly Removal

How to remove the assembly that directs water to the evaporator.

Control Box Cover Removal

Procedure for accessing the unit's control box.

User Interface Board Removal

Steps to remove the main control interface board.

Filter Indicator Removal

Procedure to remove the filter indicator light.

Transformer Removal

Steps to remove the unit's transformer.

Light Fixture Removal

Procedure for removing the interior light fixture.

Main Control Board Removal

Procedure for removing the primary control board.

Interior Components

Procedures for accessing and removing internal parts of the ice machine.

Water Paddle Removal

How to remove the paddles that distribute water over the evaporator.

Ice Chute Removal

Steps to remove the chute that guides ice into the storage bin.

Water Trough Drain Tube and Standpipe/Overflow Tube Removal

Procedure for removing the drain and overflow plumbing.

Water Trough Removal

Steps to remove the component that holds water for ice making.

Spray Bar Assembly Removal and Disassembly

How to remove and disassemble the spray bar for cleaning.

Water Pump Removal

Procedure for removing the unit's water pump.

Compressor/Condenser Area Components

Accessing components in the compressor and condenser area.

Water Valve Removal

Procedure for removing the water inlet valve.

Water Filter Enclosure and Head Removal

Steps to remove the water filter housing and head.

Ice Bin Level (Thermostat) Switch Removal

Procedure for removing the ice bin level sensing switch.

Hot Gas Valve Solenoid Removal

Steps to remove the solenoid from the hot gas valve.

Drain Pump Assembly Removal (UC-15IP & UC-15IPO Only)

Procedure for removing the drain pump assembly.

Liquid Line Thermistor Removal

Steps to remove the thermistor measuring liquid line temperature.

Condenser Fan Motor Assembly Removal

Procedure for removing the condenser fan motor.

Sealed System Components

Procedures for accessing and removing components within the sealed refrigeration system.

Hot Gas Valve Removal

Steps to remove the hot gas valve from the sealed system.

High-Side Filter-Drier Removal

Procedure for removing the filter-drier from the sealed system.

Compressor Removal

Steps to remove the main compressor unit.

Evaporator/Heat Exchanger Assembly Removal

Procedure for removing the evaporator and heat exchanger.

Condenser Removal

Steps to remove the unit's condenser.

Section 6 Troubleshooting Guide

Troubleshooting Guide Usage and Layout

Instructions on how to use and understand the troubleshooting guide.

Ice Machine Does Not Operate

Possible causes and actions for when the ice machine does not power on.

Ice Machine Operates, but Will Not Make Ice

Causes and solutions when the unit runs but fails to produce ice.

Ice Machine Makes Ice, but Cubes Do Not Release from Mold

Troubleshooting steps for when ice fails to eject from the molds.

Slow/Low Ice Production

Identifying and resolving issues causing reduced ice production rates.

Cubes are Shallow, Incomplete or White

Diagnosing and fixing problems related to poor cube quality.

Cubes are Too Big

Troubleshooting steps for when ice cubes are oversized.

Bin Front Panel Sweats

Identifying causes and solutions for condensation on the bin's front panel.

Section 7 Technical Data

Technical Data

A table of key technical data including pressure, temperature, and electrical ratings.

Section 8 Wiring Diagram

Wiring Diagram Models: UC-151

Detailed electrical schematic for the UC-151 model.