Sub-Zero UC-15I Service Manual
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Sub-Zero UC-15I Service Manual

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T T e e c c h h n n i i c c a a l l S S e e r r v v i i c c e e
M M a a n n u u a a l l
MODEL
UC-15I
MODEL
UC-15I

(Undercounter Ice Machine)

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

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Summary of Contents for Sub-Zero UC-15I

  • Page 1: Undercounter Ice Machine

    T T e e c c h h n n i i c c a a l l S S e e r r v v i i c c e e M M a a n n u u a a l l MODEL UC-15I MODEL UC-15I (Undercounter Ice Machine) (Undercounter Ice Machine) © SUB-ZERO INC. 2009 ALL RIGHTS RESERVED JOB AID #7012423 (Revision A. - October, 2009)

  • Page 3: General Information

    Model UC-15I (Undercounter Ice Machine) General Information SECTION 1 GENERAL INFORMATION #7012423 - Revision A - August, 2009...

  • Page 4: Introduction

    Sub-Zero service training and service repair purposes with permission from Manitowoc FSG Operations, Inc. This manual will provide the most recent service information about the model UC-15I. This information will enable the service technician to diagnose malfunctions, perform necessary repairs and return a model UC-15I appliance to proper operational status.

  • Page 5: Table Of Contents

    Sealed System Information ..........7-2 Ice Making (Freeze) Cycle ..........3-5 Electrical Information ............7-2 Harvest Cycle ..............3-6 What to Expect from the Model UC-15I ......3-7 Section 8 - Wiring Diagrams & Schematics Ice ................... 3-7 Storage ................3-7 Model UC-15IP Run Time ................

  • Page 6: Warranty Information

    • Sub-Zero, Inc. assumes no liability or responsibility ONE & FIVE YEAR Display / Model Home Warranty for Sub-Zero products that have been altered in any Summary (Display units sold three years after date way, including the use of parts and/or components not of manufacture) specifically approved by Sub-Zero.

  • Page 7: Model Description

    Model UC-15I (Undercounter Ice Machine) General Information MODEL DESCRIPTION Models UC-15I and UC-15IO have a gravity drain, while Models UC-15IP and UC-15IPO have a built-in pump to allow greater installation flexibility. Model Features • 24" (610 mm) depth design for a complete integrated look.
  • Page 8 Model UC-15I (Undercounter Ice Machine) General Information #7012423 - Revision A - August, 2009...

  • Page 9: Section 2 - Installation Information

    Model UC-15I (Undercounter Ice Machine) Installation Information SECTION 2 INSTALLATION INFORMATION #7012423 - Revision A - August, 2009...

  • Page 10: Pre-Installation Considerations

    Model UC-15I (Undercounter Ice Machine) Installation Information PRE-INSTALLATION CONSIDERATIONS To properly make and store ice, the model UC-15I: • Must have an open site (gravity) drain available PROPER INSTALLATION REQUIRES CONNECTION (applies to models without a drain pump only). Refer TO A WATER SUPPLY, A DRAIN AND A DEDICATED to specifications found later in this section.
  • Page 11 Service diagnostics are per- formed from the top of the ice machine. Models UC-15I and UC-15IO are gravity drain models that require a drain tube that is pitched down from the • The location must be free of airborne and other con- outlet at the back of the unit to the sanitary sewer con- taminants.

  • Page 12: Electrical Requirements

    Model UC-15I (Undercounter Ice Machine) Installation Information ELECTRICAL REQUIREMENTS • The minimum wire size is #14 for less than 100 feet (30.5 m) or #12 for more than 100 feet (30.5 m) to Prepare electrical circuit before installation of the ice 200 feet (61 m) (solid copper conductor only).

  • Page 13: Plumbing Requirements

    1/4” ID copper cold water line and compression fitting • Drain pump discharge line must terminate at an open (not supplied). Models UC-15I and UC-15IO are sup- site drain. plied with a drain hose for gravity draining. The option- al drain pump or pump models UC-15IP and UC-15IPO •...
  • Page 14 Model UC-15I (Undercounter Ice Machine) Installation Information WATER SUPPLY AND DRAIN LINE SIZING / CONNECTIONS Water Water Ice Machine Tubing size up to Temperature Pressure Fitting Ice Machine Fitting Ice Making 50°F (10°C) Min. 20 psi (137.9 kPA) Min. 1/4” (6.4 mm) ID 1/4”...

  • Page 15: Installation Procedure

    Model UC-15I (Undercounter Ice Machine) Installation Information INSTALLATION PROCEDURE 1. Prepare the site by following the instructions under 9. Open the shut-off valve on the water line. Electrical Requirements and Plumbing 10. Check all visible connections for water leakage. Requirements found earlier in this section.
  • Page 16 Model UC-15I (Undercounter Ice Machine) Installation Information 13. Prepare sanitizer solution and sanitize the ice machine according to In Place Cleaning/Sanitizing Do NOT cover the kickplate area instructions found in the Installation & Operation manual. 14. Put one gallon (4 L) of cold water into a container The unit must be allowed to have ventilation through that will easily pour under the lifted water shutters.

  • Page 17: Leveling

    Model UC-15I (Undercounter Ice Machine) Installation Information SIDE PANELS LEVELING With the Sub-Zero ice machine, the side panels must 1. Adjust the levelers close to desired height. be securely fastened to the adjacent cabinets and floor. 2. Move the bin into its final position.
  • Page 18 Model UC-15I (Undercounter Ice Machine) Installation Information 2. Remove the hinges from the door by removing the 6. Remove four screws from the front top rail. Refer four screws (two each hinge) that secure the hinges to the illustration below.

  • Page 19: Door Panel Installation

    NOTE: It is recommended to start the first few holes, PANEL DESIGN NOTE: Additional panel design infor- positioning the hardware, drilling remaining pilot holes, mation can be found in the Sub-Zero design guide. and securing the mounting brackets with the #8 x 1/2” Check our website at subzero.com.

  • Page 20: 90-Degree Door Stop Installation

    Model UC-15I (Undercounter Ice Machine) Installation Information Hinge Cover Installation NOTES: If the reveal on the hinge side of the door panel is less than 1/4", and the panel has a square corner, • Do NOT Install the hinge covers until after installation severe finger pinching or damage to the unit may of the ice machine is complete.

  • Page 21: Section 3 - Theory Of Operation

    Model UC-15I (Undercounter Ice Machine) Theory of Operation SECTION 3 THEORY OF OPERATION #7012423 - Revision A - August, 2009...

  • Page 22: Control Panel

    Model UC-15I (Undercounter Ice Machine) Theory of Operation CONTROL PANEL This page shows the control panel layout (See Figure 3-1) and explains the functions performed at the control panel POWER Button (Green Indicator Light) Pressing the POWER button once will activate the ice machine and green POWER light.

  • Page 23: Operating Systems

    Model UC-15I (Undercounter Ice Machine) Theory of Operation OPERATING SYSTEMS • Capillary Tube: The warm liquid refrigerant travels There are three operating systems in the ice machine: through the skinny capillary tube which is attached to the suction tube and wrapped around the base of the •...
  • Page 24 Model UC-15I (Undercounter Ice Machine) Theory of Operation Water System Cube Molds (16) Water Inlet Tube The water system provides and recirculates the Circulating Pump water for ice production. It also provides a means of drainage. After the ice is produced, the water system flushes the impurities and minerals that were in the water, down the drain.

  • Page 25: Harvest Cycle

    Model UC-15I (Undercounter Ice Machine) Theory of Operation SEQUENCE OF OPERATION The Sequence of Operation table below provides a quick overview of the different operational events that the ice- maker will experience under normal conditions. Following the table, wire diagrams are used to illustrate which com- ponents are energized during each event and additional information is provided.
  • Page 26 Model UC-15I (Undercounter Ice Machine) Theory of Operation Initial Start-up / Start-up after Automatic Shut-off For 175 seconds (2.9 minutes) the water pump, water inlet valve, and hot-gas (har- vest) valve are energized (See Figure 3-5). This is done for the following reasons: 1.
  • Page 27 Model UC-15I (Undercounter Ice Machine) Theory of Operation Freeze (Ice Making) Cycle During the freeze cycle, only the compres- COMPRESSOR sor, condenser fan motor and water pump are energized (See Figure 3-7). The com- pressor pushes refrigerant through the sealed system, the condenser fan draws air...
  • Page 28 Model UC-15I (Undercounter Ice Machine) Theory of Operation Harvest Cycle During the last minute of the freeze cycle COMPRESSOR the electronic control observes the temper- ature detected by the the thermistor on the liquid line (See Figure 3-9), then calculates and controls proper harvest duration.
  • Page 29 Model UC-15I (Undercounter Ice Machine) Theory of Operation Automatic Shut-off If/when the ice in the bin reaches the bin level thermostat, the thermostat will open, interrupting ice production until enough ice is removed/used or after enough ice melts (See Figure 3-11).

  • Page 30: What To Expect From The Model Uc-15I

    WHAT TO EXPECT FROM THE MODEL UC-15I The model UC-15I will release a batch of cubes approximately every thirty minutes. At the same time the cubes fall into the bin, water will be filling the reservoir and carrying the mineral impurities down the drain.

  • Page 31: Adjusting The Bin Thermostat

    Model UC-15I (Undercounter Ice Machine) Theory of Operation Testing and Adjusting the Bin Thermostat Cube Weight Adjustment The bin thermostat stops the ice machine when the bin The ice machine has been programmed to produce the is full. It is preset for normal ambient temperatures and proper cube weight, based on average ambient air and adjustments are usually not required.
  • Page 32 Model UC-15I (Undercounter Ice Machine) Theory of Operation 3-12 #7012423 - Revision A - August, 2009...

  • Page 33: Section 4 - Maintenance, Cleaning & Adjustments

    Model UC-15I (Undercounter Ice Machine) Maintenance/Cleaning/Adjust SECTION 4 MAINTENANCE, CLEANING AND ADJUSTMENT INFORMATION #7012423 - Revision A - August, 2009...

  • Page 34: Ice Maker Cleaning And Maintenance

    • To ensure efficient operation, Sub-Zero recommends an annual cleaning be performed by a qualified service tech- nician in which the ice machine is partially disassembled for a more thorough cleaning and sanitizing.

  • Page 35: Cleaning & Sanitizing The Interior

    (6) months. Damage to the ice machine caused by incorrect chemical usage is not covered by the warranty. Use only Sub-Zero approved ice machine cleaner (part #7013400) and sanitizer (part #7013401). Figure 4-4. Pour Cleaner Into Spray Area 4.

  • Page 36: Disassembly Cleaning / Sanitizing

    Model UC-15I (Undercounter Ice Machine) Maintenance/Cleaning/Adjust Disassembly Cleaning / Sanitizing - This procedure 5. Mix 1 oz (30 ml) sanitizer with 2 gallons (7.6 liters) should be performed by a qualified service technician of warm water. only, as it entails disassembly of the ice machine for a NOTE: Since this mixture will be divided into two more thorough cleaning and sanitizing.

  • Page 37: Removal Of Parts For Cleaning

    Model UC-15I (Undercounter Ice Machine) Maintenance/Cleaning/Adjust REMOVAL OF PARTS FOR CLEANING Screws AND SANITIZING Removal of parts for the recommended annual cleaning and sanitizing should be performed by a qualified serv- ice technician only. Before beginning to remove components, perform an in place cleaning as described on page 4-3.

  • Page 38: Ice Chute

    Model UC-15I (Undercounter Ice Machine) Maintenance/Cleaning/Adjust Ice Chute Removal The ice chute is positioned over the spray nozzles and Ice Ramp allows the ice to easily fall into the bin. To remove the ice chute, grab protruding spray hole on...

  • Page 39: Spray Bar Assembly

    Model UC-15I (Undercounter Ice Machine) Maintenance/Cleaning/Adjust Spray Bar Assembly Removal and Disassembly Water Nozzle Clamp Nozzle To remove the spray bar assembly, the ice chute and Insert water trough will need to be removed first, then (See Figure 4-14): Water 1.

  • Page 40: Removal From Service/Long Term Storage/Winterization

    Model UC-15I (Undercounter Ice Machine) Maintenance/Cleaning/Adjust REMOVAL FROM SERVICE/ LONG TERM WATER FILTER REPLACEMENT STORAEG / WINTERIZATION To replace the water filter, incoming water does not need to be turned off. Follow the procedure below (See Special precautions must be taken if the ice machine is...

  • Page 41: Adjustments

    Model UC-15I (Undercounter Ice Machine) Maintenance/Cleaning/Adjust ADJUSTMENTS There are two settings that may be adjusted: • Cube Weight • Bin Ice Level Cube Weight Check and Adjustment The cube weight can be increased (See Figure 4-17) Cube weight increases or decreases depending on the from the factory setting by adjusting the freeze cycle fin- amount of dimple in the cube.
  • Page 42 Model UC-15I (Undercounter Ice Machine) Maintenance/Cleaning/Adjust 4-10 #7012423 - Revision A - August, 2009...

  • Page 43: Section 5 - Component Access And Removal

    Model UC-15I (Undercounter Ice Machine) Component Access / Removal SECTION 5 COMPONENT ACCESS AND REMOVAL #7012423 - Revision A - August, 2009...
  • Page 44 Component Access / Removal COMPONENT ACCESS AND REMOVAL This section explains how to access and remove model UC-15I cosmetic, mechanical and sealed system compo- nents. An attempt has been made to arrange these procedures in such a way as to simulate which components would need to be removed first in order to gain access to other components.
  • Page 45 Model UC-15I (Undercounter Ice Machine) Component Access / Removal Exterior Components Kickplate Removal The kickplate is held in place with four screws, two Kickplate along each side. To remove the kickplate, extract the screws and pull the kickplate forward. (See Figure 5-1)
  • Page 46 Model UC-15I (Undercounter Ice Machine) Component Access / Removal Door Assembly Removal The door assembly is attached to the top and bottom hinge assemblies with screws passing through the hinge assemblies, from front to back, into the face of the door.
  • Page 47 Model UC-15I (Undercounter Ice Machine) Component Access / Removal Water Filter Panel Removal The water filter panel is captivated between the trim plate / slide cover bracket and the front of the cabinet body. To remove the water filter panel, first remove the kick- plate, door, lower hinge assembly and trim plate and slide cover bracket.
  • Page 48 Model UC-15I (Undercounter Ice Machine) Component Access / Removal Lower Back Utility Panel Removal Water Inlet Tube The lower back utility panel is attached to the rear of the unit with screws. NOTES: • To fully remove the lower utility panel, the water inlet tube will need to be disconnected from the house supply line.
  • Page 49 Model UC-15I (Undercounter Ice Machine) Component Access / Removal Front Top Rail Removal Screws Lift Here The front top rail slides down behind the left and right outer side panels and is secured with screws at each end that pass down through the rail into the cabinet frame.
  • Page 50 Model UC-15I (Undercounter Ice Machine) Component Access / Removal Components Below Top Cover Screw The control box, water shutter assembly and splash shield are all accessible only after removing the unit’s top cover. The control box contains the user interface...
  • Page 51 Model UC-15I (Undercounter Ice Machine) Component Access / Removal User Interface Board Removal Control Board To remove the user interface board, the top cover and control box cover must be removed first, then (See Figure 5-16): 1. Disconnect all electrical leads from user interface board at Molex connector.
  • Page 52 Model UC-15I (Undercounter Ice Machine) Component Access / Removal Interior Components Water Paddle Removal v e r a t o r C o E v a p o r The water paddles reduce the spraying water escaping the evaporator compartment. A steel rod which sup- ports the water paddles sits in grooves molded into the evaporator cover.
  • Page 53 Model UC-15I (Undercounter Ice Machine) Component Access / Removal Water Trough Removal To remove the water trough (See Figure 5-22): 1. Depress tabs on right and left side of the water trough. 2. Allow front of trough to drop as you pull forward to disengage the rear pins, then pull from bin.
  • Page 54 Model UC-15I (Undercounter Ice Machine) Component Access / Removal Compressor/Condenser Area Components Electrical Connection Water Valve Removal The water valve is located on the lower left front of the unit behind the kickplate, and is secured to the mount- Disconnect ing bracket with a screw.
  • Page 55 Model UC-15I (Undercounter Ice Machine) Component Access / Removal Ice Bin Level (Thermostat) Switch Removal Thermostat The ice bin level switch is is located on the lower right Electrical Capillary Tube front of the unit behind the kickplate, secured to a Leads bracket with a nut.
  • Page 56 Model UC-15I (Undercounter Ice Machine) Component Access / Removal Liquid Line Thermistor Removal The liquid line thermistor plugs directly into the control Thermistor board, with its leads running to the right, then toward Wire the rear of the unit under the top flange of the right side...
  • Page 57 Model UC-15I (Undercounter Ice Machine) Component Access / Removal Sealed System Components Hot Gas Valve Removal Solenoid Coil The hot gas valve is attached to the compressor dis- charge line, after a T-connector. The outlet of the valve is the hot gas tube that runs up to the evaporator.
  • Page 58 Model UC-15I (Undercounter Ice Machine) Component Access / Removal Compressor Removal Pry up with Screwdriver Electrical Connections The compressor sits on four grommets that are posi- tioned over four tabs protruding up from the unit tray; cotter pins are then inserted through holes at the top of the tabs, above the compressor base and grommets.
  • Page 59 Model UC-15I (Undercounter Ice Machine) Component Access / Removal Condenser Removal The condenser has a mounting bracket that is secured with screws to the condenser. The mounting bracket is then secured to the unit base tray with screws along the flange of the mounting bracket.
  • Page 60 Model UC-15I (Undercounter Ice Machine) Component Access / Removal 5-18 #7012423 - Revision A - August, 2009...

  • Page 61: Troubleshooting Guide

    Model UC-15I (Undercounter Ice Machine) Troubleshooting SECTION 6 TROUBLESHOOTING GUIDE #7012423 - Revision A - August, 2009...

  • Page 62: How To Use The Troubleshooting Guide

    Model UC-15I (Undercounter Ice Machine) Troubleshooting TROUBLESHOOTING GUIDE This section of the manual contains the Troubleshooting Guide which will help the Service Technician troubleshoot a model UC-15I. How to Use the Troubleshooting Guide The list below indicates how the Troubleshooting Guide is arranged. Identify the description of the problem that the unit is experiencing from the list and go to the page indicated.
  • Page 63 Ambient air temperature minimum = 50°F Operate (10°C), maximum = 100°F (38°C) for models UC-15I and UC-15IP; 110°F (43°C) for models UC-15IO and UC-15IPO. Advise customer. NOTE: Check control board light to see if ice machine shutdown on over temperature limit (control board light will flash rapidly).
  • Page 64 Model UC-15I (Undercounter Ice Machine) Troubleshooting PROBLEM POSSIBLE CAUSE TEST / ACTION (Continued from last page) B. Ice Machine Operates, but No Water in Water Trough a. Water supply is off. Turn water supply on. Will Not Make Ice b. Check water supply line for kinks or restric- tions.
  • Page 65 Improper Ambient Temperatures Ambient air temperature minimum = 50°F (10°C), maximum = 100°F (38°C) for models UC-15I and UC-15IP; 110°F (43°C) for models UC-15IO and UC-15IPO. Advise customer. NOTE: Check control board light to see if ice machine shutdown on over temperature limit (control board light will flash rapidly).
  • Page 66 Model UC-15I (Undercounter Ice Machine) Troubleshooting PROBLEM POSSIBLE CAUSE TEST / ACTION (Continued from last page) D. Slow/Low Ice Production Water Filter Clogged Check water filter. Replace if clogged. Water Escaping from Water Trough a. Check water trough for leaks. Reposition trough or replace.

  • Page 67: Technical Data

    Model UC-15I (Undercounter Ice Machine) Technical Data SECTION 7 TECHNICAL DATA #7012423 - Revision A - August, 2009...
  • Page 68 Model UC-15I (Undercounter Ice Machine) Technical Data Technical Data Minimum - Maximum Water Pressure 20 - 80 psi (1.4 - 5.5 bar) Minimum - Maximum Water Temperature 35 - 90°F (1.6 - 32.2°C) Liquid Line Thermistor Resistance (Ohms) at 32°F (0°C) / 77°F (25°C)

  • Page 69: Wiring Diagram

    Model UC-15I (Undercounter Ice Machine) Wiring Diagram SECTION 8 WIRING DIAGRAM #7012423 - Revision A - August, 2009...
  • Page 70 Model UC-15I (Undercounter Ice Machine) Wiring Diagram WIRING DIAGRAM MODELS: UC-15I -This wiring information is provided for use by qualified service personnel only. -Disconnect appliance from electrical supply before beginning service. -Be sure all grounding devices are connected when service is complete.

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