Model UC-15I (Undercounter Ice Machine) Component

Model UC-15I (Undercounter Ice Machine) Component
Technical Service
Manual
MODEL UC-15I
(Undercounter Ice Machine)
© SUB-ZERO INC.
2009 ALL RIGHTS RESERVED
JOB AID #7012423
(Revision A. - October, 2009)
Model UC-15I (Undercounter Ice Machine)
General Information
SECTION 1
GENERAL INFORMATION
1-1
#7012423 - Revision A - August, 2009
General Information
Model UC-15I (Undercounter Ice Machine)
INTRODUCTION
This Sub-Zero Technical Service (Job Aid Part #7012423) is a compilation of data, specifications and illustrations
from Sub-Zero, Inc. and Manitowoc FSG Operations, Inc.. The information in this manual has been produced for
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.
The service technician should read the complete instructions contained in this manual before initiating any repairs on
a model UC-15I.
IMPORTANT SAFETY INFORMATION
TECHNICAL ASSISTANCE
Below are the Product Safety Labels used in this manual. The "Signal Words" used are WARNING or CAUTION.
If you should have any questions regarding the appliance
and/or this manual, please contact:
Sub-Zero, Inc.
ATTN: Service Department
P.O. Box 44988
Madison, WI 53744 - 4988
When reviewing this manual, please note these different Product Safety Labels placed at the beginning of
certain sections of this manual. You must follow the
instructions given in the boxes below the Product
Safety Labels in order to avoid personal injury and/or
product damage.
Customer Assistance
Phone #: (800) 222 - 7820
Facsimile #: (608) 441 - 5887
The sample Product Safety Labels below illustrate the
precautions that should be taken when the signal word
is observed.
Technical Assistance
(For Technicians in Customer’s Homes Only)
Phone #: (800) 919 - 8324
INDICATES THAT HAZARDOUS OR UNSAFE
PRACTICES COULD RESULT IN SEVERE PERSONAL INJURY OR DEATH
Warranty Claims
Phone #: (800) 332 - 9513
Facsimile #: (608) 441 - 5886
Service Department e-Mail Address:
[email protected]
Indicates that hazardous or unsafe practices could
result in minor personal injury or product and/or
property damage
Office Hours:
7:00 AM to 6:00 PM Central Time
Monday through Friday
In addition, please pay attention to the signal word
“NOTE”, which highlights information that is especially
important for the topic being covered.
This manual was designed to be used by Authorized Service Personnel only. Sub-Zero, Inc. assumes no
responsibility for any repairs made on Sub-Zero refrigeration units by anyone other than Authorized
Service Technicians.
The information and images contained in this manual are the copyright property of Sub-Zero, Inc. Neither this manual nor any information or images contained herein may be copied or used in whole or in part without the express
written consent of Sub-Zero, Inc. ©, all rights reserved.
#7012423 - Revision A - August, 2009
1-2
Model UC-15I (Undercounter Ice Machine)
General Information
TABLE OF CONTENTS
Page #
Page #
1-1
Section 4 - Maintenance, Cleaning & Adjustments 4-1
Introduction ......................................................................... 1-2
Important Safety Information .............................................. 1-2
Technical Assistance .......................................................... 1-2
Table of Contents ................................................................ 1-3
Warranty Information .......................................................... 1-5
Serial Number Tag Information ........................................... 1-5
Model Description ............................................................... 1-6
Components / Features ...................................................... 1-6
Ice Maker Cleaning and Maintenance................................. 4-2
Recommended Cleaning / Maintenance Schedule ........ 4-2
Cleaning the Exterior ...................................................... 4-2
Cleaning the Condenser ................................................. 4-2
Cleaning & Sanitizing the Interior ................................... 4-3
In Place Cleaning / Sanitizing ..................................... 4-3
Disassembly Cleaning / Sanitizing .............................. 4-4
Removal of Parts for Cleaning ........................................... 4-5
Top Cover ....................................................................... 4-5
Splash Shield .................................................................. 4-5
Water Shutter Assembly ................................................. 4-5
Ice Chute ........................................................................ 4-6
Water Trough Drain Tube & Standpipe/Overflow Tube ... 4-6
Water Trough .................................................................. 4-6
Spray Bar Assembly ....................................................... 4-7
Water Pump .................................................................... 4-7
Removal from Service/Long Term Storage/Winterization .. 4-8
Water Filter Replacement ................................................... 4-8
Adjustments ........................................................................ 4-9
Cube Weight Check and Adjust ...................................... 4-9
Testing and Adjusting Bin Thermostat .............................4-9
Section 1 - General Information
Section 2 - Installation Information
2-1
Pre-Installation Considerations .......................................... 2-2
Electrical Requirements .................................................. 2-4
Plumbing Requirements ................................................. 2-5
Installation Procedure ......................................................... 2-7
Leveling .......................................................................... 2-9
Securing the Ice Machine ............................................... 2-9
Side Panels .................................................................... 2-9
Reversing the door Swing .............................................. 2-9
Door Panel Installation .................................................. 2-11
Door Panel Dimensions ............................................. 2-11
Panel Preparation and Installation ............................ 2-11
90-Degree Door Stop Installation ................................. 2-12
Hinge Cover Installation ................................................ 2-12
Section 3 - Theory of Operation
Section 5 - Component Access and Removal
5-1
Section 5 Table of Contents .............................................. 5-2
Access and Removal WARNINGS and CAUTIONS ..... 5-2
3-1
Control Panel ...................................................................... 3-2
POWER Button (Green Indicator Light) .......................... 3-2
Automatic Ice Making Light (Blue Indicator Light) .......... 3-2
DELAY Start .................................................................... 3-2
CLEAN Button (Green Indicator Light) ........................... 3-2
REPLACE FILTER (Red Indicator Light) ........................ 3-2
Operating Systems ............................................................. 3-3
Refrigeration System ...................................................... 3-3
Water System ................................................................. 3-4
Electrical System ............................................................ 3-4
Operational Cycles ............................................................. 3-5
Ice Making (Freeze) Cycle .............................................. 3-5
Harvest Cycle ................................................................. 3-6
What to Expect from the Model UC-15I ............................. 3-7
Ice ................................................................................... 3-7
Storage ........................................................................... 3-7
Run Time ........................................................................ 3-7
Testing & Adjusting the Ice Bin Thermostat ................... 3-8
Resting the Bin Thermostat ........................................ 3-8
Adjusting the Bin Thermostat ...................................... 3-8
Cube Weight Adjustment ................................................ 3-8
Adjusting Freeze Cycle finish Time ............................. 3-8
Checking the Additional Freeze Cycle Time ............... 3-8
Section 6 - Troubleshooting Guide
6-1
Troubleshooting Guide .......................................................
How to Use the Troubleshooting Guide .............................
Warning ..........................................................................
Troubleshooting Guide Layout ...........................................
Troubleshooting Guide ...................................................
6-2
6-2
6-2
6-2
6-3
Section 7 - Technical Data Tables
7-1
Water and Ice Information .................................................. 7-2
Sealed System Information ................................................ 7-2
Electrical Information .......................................................... 7-2
1-3
Section 8 - Wiring Diagrams & Schematics
8-1
Model UC-15IP
8-2
#7012423 - Revision A - August, 2009
General Information
Model UC-15I (Undercounter Ice Machine)
WARRANTY INFORMATION
Warranty Details:
This page contains summaries of the 2, 5 & 12 Year
Warranties that are supplied with Sub-Zero Appliances.
* Total Product Parts include, but is not limited to:
Control, Circulating Pump, Switches, Fan Motor &
Blade, Drain Tube, Wiring, Water Valve, Hot Gas
Valve, Door hinges, Compressor Electricals, etc. . .
NOTE: The ice machine must be protected if it will
be subjected to ambient temperatures below 32°F
(0°C). Component failure caused by exposure to
freezing temperatures is not covered by the warranty.
TWO, FIVE & TWELVE YEAR Warranty Summary
• Two year TOTAL PRODUCT warranty, *parts and
labor.
• Five Year SEALED SYSTEM warranty, **parts and
labor.
• Sixth through Twelfth year LIMITED SEALED SYSTEM warranty, sealed system **parts only.
** Sealed System Parts include the following:
Compressor, Condenser, Evaporator, Filter-Drier,
Heat-exchanger, All Tubing That Carries the Freon.
NOTE: Condenser Fan Motor, Freon, Solder and
compressor electricals are NOT considered sealed
system parts.
ONE & FIVE YEAR Non-Residential Warranty
Summary (Outdoor Models ONLY)
• One Year TOTAL PRODUCT warranty, *parts and
labor.
• Five year LIMITED SEALED SYSTEM warranty,
sealed system **parts only.
General Warranty Notes:
• Sub-Zero, Inc. assumes no liability or responsibility
for Sub-Zero products that have been altered in any
way, including the use of parts and/or components not
specifically approved by Sub-Zero.
• All warranties begin at the time of the unit's initial
installation.
• The serial tag is located in two places: one on the left
wall of the ice bin and one on the back of the unit.
(See Diagram below). Please have this information
whenever contacting the factory or parts distributor.
ONE & FIVE YEAR Display / Model Home Warranty
Summary (Display units sold three years after date
of manufacture)
• One Year TOTAL PRODUCT warranty, *parts and
labor.
• Five year LIMITED SEALED SYSTEM warranty,
sealed system **parts only.
Serial Number Tag Information:
MODEL UC15IO
SERIAL NO.
DESIGN PRESSURE HIGH SIDE
DESIGN PRESSURE LOW SIDE
REFRIG. TYPE
R-134A
VOLTS
115V
CYCLE
TOTAL AMPS
XXXXXXX
MFG DT 0809
350
250
P. S. I. G.
P. S. I. G.
REFRIG. CHARGE 5.6OZ.
60 Hz
PHASE 1
4.1 A
URC
DPMCRE2
#7012423 - Revision A - August, 2009
SUBZERO FREEZER CO. INC.
1-4
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.
• Door accepts custom panels.
• Automatic ice machine provides high-quality, clear ice.
• Ice storage bin capacity of up to 25 lbs (11 kg).
• Automatic defrost.
• Reversible door swing.
• Front venting with removable kickplate allows unit to be serviced from the front.
• Solid core door with gasket and door closer.
• UL approved for US and Canada, with the UC-15IO and UC-15IPO being UL approved for outdoor use.
COMPONENTS / FEATURES
Control
Panel
Reversible
Door Hinge
Ice
Scoop
Water
Shutters
Water
Reservoir
Gasket
Large Capacity
Ice Storage Bin
Water
Filter
Rating
Plate
Bin
Light
Kickplate
1-5
#7012423 - Revision A - August, 2009
General Information
Model UC-15I (Undercounter Ice Machine)
#7012423 - Revision A - August, 2009
1-6
Model UC-15I (Undercounter Ice Machine)
Installation Information
SECTION 2
INSTALLATION
INFORMATION
2-1
#7012423 - Revision A - August, 2009
Installation Information
Model UC-15I (Undercounter Ice Machine)
PRE-INSTALLATION CONSIDERATIONS
To properly make and store ice, the model UC-15I:
• Must have an open site (gravity) drain available
(applies to models without a drain pump only). Refer
to specifications found later in this section.
PROPER INSTALLATION REQUIRES CONNECTION
TO A WATER SUPPLY, A DRAIN AND A DEDICATED
ELECTRICAL CIRCUIT. THESE CONNECTIONS
ARE
THE
RESPONSIBILITIES
OF
THE
OWNER/OPERATOR. IMPROPER CONNECTIONS
CAN RESULT IN PERSONAL INJURY, SUBSTANTIAL PROPERTY DAMAGE AND ERRATIC
MACHINE OPERATION. IF UNABLE TO SAFELY
CONNECT THE ICE MACHINE, CONSULT QUALIFIED PROFESSIONALS OR CONTACT SUB-ZERO.
• Must have a grounded, polarized electrical power
supply on a separate circuit servicing only this appliance. If GFCI (ground fault circuit interrupter) is
required by local electrical code or is part of an outdoor installation, it must be breaker type, not outlet
type. Refer to specifications found later in this section.
• Must have a cold water supply line available at ice
machine. Refer to specifications found later in this
section.
• Specifications for clearance and air temperature
requirements must be met. Refer to specifications
found later in this section.
• Must be re movable for yearly cleaning procedure.
Refer to specifications found later in this section.
NOTE: Failure to follow installation guide lines may
affect warranty coverage.
OVERALL DIMENSIONS
14-3/4"
(375 mm)
1-11/16"* (43 mm)
ALL MODELS
21-5/16"
(541 mm)
33-5/8"
(854 mm)
29-5/8"
(752 mm)
33-5/8"
(854 mm)
18"
(457 mm)
4"
(102 mm)
14-3/4"
(375 mm)
21-5/16"
(541 mm)
FRONT VIEW
SIDE VIEW
115˚
DOOR SWING
14-3/4" (375 mm)
Overall Height (levelers in)
33-5/8" (854 mm)
Overall Depth
23" (584 mm)
Minimum Door Clearance
18" (457 mm)
Rough Opening Width
Rough Opening Height
15-1/4" (387 mm)
34-1/2" (876 mm)
Minimum Height Required
(levelers in)
33-5/8" (854 mm)
Rough Opening Depth
24" (610mm)
Dimensions may vary ± 1/8" (3 mm).
TOP VIEW
*Does not include door panel
Dimensions in parentheses are in millimeters unless otherwise specified.
#7012423 - Revision A - August, 2009
Overall Width
2-2
6-1/2"
(165 mm)
Model UC-15I (Undercounter Ice Machine)
Installation Information
Location of the Ice Machine
Area Requirements
The location selected for the ice machine must meet
the following criteria. If any of these criteria are not
met, select another location.
Before moving the ice machine into place, be sure the
finished opening dimensions, electrical location and
plumbing location are accurate.
• The ice machine may be built into a cabinet, however
the location must allow removal of the ice machine for
cleaning and servicing. Service diagnostics are performed from the top of the ice machine.
Be sure the plumber, electrician and cabinet installer
have this information before finishing work is completed.
Models UC-15I and UC-15IO are gravity drain models
that require a drain tube that is pitched down from the
outlet at the back of the unit to the sanitary sewer connection.
• The location must be free of airborne and other contaminants.
• Do not place the unit within 18" (457) of a trash compactor or trash/recycling container.
Models UC-15IP and UC-15IPO have a built in drain
pump that will pump water up to a drain point, such as
a nearby sink. Refer to specifications found later in this
section.
• The air temperature must be at least 50°F (10°C).
But, the air temperature must not exceed 100°F
(38°C) for models UC-15I and UC-15IP, and 110°F
(43°C) for models UC-15IO and UC-15IPO.
NOTES:
• The location must not be near heat-generating equipment.
• If the ice machine is installed in a corner, the door
swing may be limited due to handle contact with the
wall or cabinet face.
• The location must not obstruct air flow through the
kickplate (airflow is in and out the front of the ice
machine).
• The floor under the ice machine must be at the same
level as the surrounding finished floor.
• The location must allow enough clearance for water,
drain and electrical connections at the rear of the ice
machine.
• When moving the unit, use a hand truck or dolly, position the dolly on the side of the unit and secure the
door so it does not open while transporting the unit.
• Models UC-15IO and UC-15IPO are designed and
approved for outdoor installation.
Any finished flooring should be protected with
appropriate material to avoid any damage from
moving the unit.
The ice machine must be protected if it will be subjected to ambient temperatures below 32°F (0°C).
Component failure caused by exposure to freezing
temperatures is not covered by the warranty.
2-3
#7012423 - Revision A - August, 2009
Installation Information
Model UC-15I (Undercounter Ice Machine)
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
200 feet (61 m) (solid copper conductor only). The
recommended breaker is 15 amp. Local or state
electrical code, length of run or materials used, can
increase the minimum wire gauge required. A qualified electrician must determine the proper wire size,
although #14 is the minimum size allowed.
Prepare electrical circuit before installation of the ice
machine. Installation requires a grounded (threeprong), polarized receptacle (See Figure 2-2), with a
separate fuse/circuit breaker in an electrical service
box.
NOTE: Observe correct polarity of incoming line voltage. Incorrect polarity can lead to erratic ice machine
operation and a safety issue.
Minimum Circuit Requirements
The minimum circuit requirement is used to help select
the wire size of the electrical supply.
Proper Three-Prong Polarized Receptacle
NOTE: Minimum Circuit Amps listed below is not the
ice machine’s running amp load.
NOTE: All National Electrical Code regulations must be
followed. In addition, be aware of local codes and ordinances when installing the services.
MAXIMUM BREAKER SIZE AND
MINIMUM CIRCUIT AMPERAGE
Voltage / Phase / Cycle
Voltage
ELECTRICAL SHOCK HAZARD. DO NOT USE AN
EXTENSION CORD OR TWO PRONG ADAPTER.
ELECTRICAL GROUND IS REQUIRED ON THIS
APPLIANCE. DO NOT REMOVE THE POWER SUPPLY CORD GROUND PRONG.
115 / 1 / 60
Maximum Fuse/Circuit Breaker Amps
15
Minimum Circuit Amps
4.1
GFCI Requirements
For Models UC-15IO and UC-15IPO or if a GFCI
(ground fault circuit interrupter) is required by local electrical code, it must be breaker type.
All electrical work, including wire routing and grounding,
must conform to local, state and national electrical
codes. The following precautions must be observed:
INSTALLATION SPECIFICATIONS
• The ice machine must be grounded.
• A separate fuse/circuit breaker must be
provided for each ice machine.
15 1/4" min (387)
ROUGH
OPENING WIDTH
• The maximum allowable voltage variation
is +/-10% of the rated voltage at ice
machine start-up (when the electrical load
is highest).
341/2" (876)
ROUGH
OPENING
HEIGHT
33 5/8" (854)
POSITION OUTLET
WITH GROUNDING
PRONG ON RIGHT
LOCATE
ELECTRICAL
WITHIN
SHADED AREA
MINIMUM
HEIGHT
REQUIRED
4" (102)
FRONT VIEW
Dimensions in parentheses are in millimeters unless otherwise specified.
#7012423 - Revision A - August, 2009
2-4
Model UC-15I (Undercounter Ice Machine)
Installation Information
PLUMBING REQUIREMENTS
Drain Connections
NOTE: Plumbing must conform to state and local
codes.
Follow these guidelines when installing drain lines to
prevent drain water from flowing back into the ice
machine and storage bin:
• Drain lines must have a 1-1/2” drop per 5 feet of run
(2.5 cm per meter), and must not create traps.
Water Supply
Prepare water supply line and drain before installation
of the ice machine. Installation requires a minimum
1/4” ID copper cold water line and compression fitting
(not supplied). Models UC-15I and UC-15IO are supplied with a drain hose for gravity draining. The optional drain pump or pump models UC-15IP and UC-15IPO
must be purchased if a gravity drain is not possible.
Both drain methods require routing to an open site
drain. Do not connect directly to drain line as bacteria
from drain line may contaminate the ice machine.
• The floor drain must be large enough to accommodate drainage from all drains.
• Drain pump discharge line must terminate at an open
site drain.
• Maximum rise – 12 feet (3.7 m)
• Maximum run – 100 feet (30.5 m).
APPROXIMATE HEIGHT OF
ICE MACHINE DRAIN
The included water filter is designed to inhibit scale formation, filter sediment, and remove chlorine odor and
taste. The life expectancy of the water filter is 6 months
during normal usage. The ice machine control board
will monitor water usage and indicate when replacement is required.
Standard Installation
5” (127mm)
Improper drainage can lead to water flowing back
into ice machine and poor performance.
Water Inlet Lines
Follow these guidelines to install water inlet lines:
• Do not connect the ice machine to a hot water supply.
Be sure all hot water restrictors installed for other
equipment are working. (Check valves on sink
faucets, dishwashers, etc.)
• If water pressure exceeds the maximum recommended pressure (80 psi–551.5 kPA), obtain a water pressure regulator from a local plumbing contractor.
• Install a water shut-off valve for the ice making water
lines.
• Insulate the water inlet line to prevent condensation.
2-5
#7012423 - Revision A - August, 2009
Model UC-15I (Undercounter Ice Machine)
Installation Information
WATER SUPPLY AND DRAIN LINE SIZING / CONNECTIONS
Water
Temperature
Water
Pressure
Ice Machine
Fitting
Tubing size up to
Ice Machine Fitting
Ice Making
Water Inlet
50°F (10°C) Min.
80°F (27°C) Max.
20 psi (137.9 kPA) Min.
80 psi (551.5 kPA) Max.
1/4” (6.4 mm) ID
Copper Tubing
1/4” (6.4 mm) minimum
Inside Diameter
Models
UC-15I and
UC-15IO
__
__
3/4” (19mm)
Hose Barb
3/4” (19mm)
minimum
Inside Diameter
Models
UC-15IP and
UC-15IPO
__
__
3/8” (9.5mm)
Hose
3/8” (9.5mm)
minimum
Inside Diameter
NOTES
• If air temperature is less than 60°F (16°C), water temperature must be equal to or greater than 50°F (10°C).
• Plumbing must conform to state and local codes.
• Although the ice machine has been designed to be serviced in place, in some cases it may be necessary to pull
the unit out for service. For that reason do not restrict access to the unit at the front, top and bottom. If a floor is
to be installed after the ice machine, shims the thickness of the floor should be installed under the unit to keep the
ice machine level with the floor. Also, allow 1/8” (3) clearance on each side of the unit for protruding screw heads.
Installations on a Cement Slab:
Use a Model UC-15IPO or UC-15IP, with built-in drain pump and pump the water to the point of drainage. Drain
pump models will pump 12 feet (3.7 m) high.
Installations Over a Crawl Space or Basement:
If there is not enough room behind the ice machine for a drain/waste water receptacle, the drain will have to be
below the floor.
INSTALLATION SPECIFICATIONS
1/2"
(13 mm)
8"
(203 mm)
LOCATION
OF
WATERLINE
24"
(610 mm)
ROUGH
OPENING
DEPTH
TOP VIEW
Dimensions in parentheses are in millimeters unless otherwise specified.
#7012423 - Revision A - August, 2009
2-6
Model UC-15I (Undercounter Ice Machine)
Installation Information
INSTALLATION PROCEDURE
1. Prepare the site by following the instructions under
Electrical Requirements and Plumbing
Requirements found earlier in this section.
9. Open the shut-off valve on the water line.
10. Check all visible connections for water leakage.
Failure to do so could cause flooding.
2. Remove ice machine from carton
3. Inspect ice machine for damage.
4. Remove literature/warranty packet and drain hose
from inside the ice machine.
IMPROPER WATER SUPPLY AND DRAIN CONNECTIONS CAN RESULT IN PERSONAL INJURY AND
SUBSTANTIAL PROPERTY DAMAGE. THESE
CONNECTIONS ARE THE RESPONSIBILITY OF
THE OWNER/OPERATOR.
5. Adjust leveler legs. Refer to Leveling found later in
this section.
6. Reverse door if desired. Refer to Reverse the Door
Swing found later in this section.
11. Connect electrical plug to grounded (three prong),
polarized outlet. See Electrical Requirements found
earlier in this section.
7. Gravity drain model: Install drain hose to drain on
back of ice machine and route to open site drain.
Refer to Plumbing Requirements found earlier in
this section.
Pump model: Route drain tubing through drain fitting on the back of the ice machine and install drain
hose on drain pump. Route other end of drain tubing to drain site. Refer to Plumbing Requirements
found earlier in this section.
THE ICE MACHINE MUST BE GROUNDED IN
ACCORDANCE WITH NATIONAL AND LOCAL
ELECTRICAL CODES. DO NOT USE AN EXTENSION CORD OR ADAPTER.
8. Use compression fitting to connect the Water Inlet
on back of ice machine to the prepared 1/4” ID cold
water line. Refer to Plumbing Requirements found
earlier in this section.
12. Place ice machine back in position and check leveling again. Make any necessary adjustments.
(CONTINUED ON NEXT PAGE)
Drain
Fitting
Water
Inlet
Water Line and Drain fitting at Rear of Unit
2-7
#7012423 - Revision A - August, 2009
Model UC-15I (Undercounter Ice Machine)
Installation Information
13. Prepare sanitizer solution and sanitize the ice
machine according to In Place Cleaning/Sanitizing
instructions found in the Installation & Operation
manual.
Do NOT cover the kickplate area
14. Put one gallon (4 L) of cold water into a container
that will easily pour under the lifted water shutters.
Refer to page 17 to identify water shutters. Open
shutters and add one gallon (4 L) of cold water.
Watch for proper drainage.
The unit must be allowed to have ventilation through
these fins. The door panel may hang in front of the
fins, but a decorative kickplate must not cover the fins.
It is possible to paint the kickplate another color. Follow
these easy steps:
15. Press POWER button.
16. At initial start-up, ice machine will need approximately 30 minutes to freeze ice and up to 5 minutes
to harvest the ice. Wait for first cycle of cubes to
drop to ensure proper installation.
• Rough up surface to be painted with fine grit sandpaper.
I N S TA L L AT I O N S P E C I F I C AT I O N S
I N S TA L L AT I O N S P E C I F I C AT I O N S
Gravity Drain Model
Drain Pump Model
• Wipe with alcohol to ensure it is clean and dry.
• Use an appliance or industrial grade, oil base, high
gloss enamel paint.
SHUT-OFF
VALVE
SHUT-OFF
DRAIN
WATER VALVE
DRAIN
INLET
TUBE
TUBE
WATER
INLET TUBE
DRAIN TUBE
AIR GAP
DEVICE
1/8" (3)
1/8" (3)
15 1/4" min
15 1/4" min
(387)
OPENING WIDTH
(387)
OPENING WIDTH
TOP VIEW
TOP VIEW
AIR GAP
DEVICE
DRAIN TUBE
WATER
INLET TUBE
SHUT-OFF
VALVE
SHUT-OFF
VALVE
WATER
INLET TUBE
DRAIN
TUBE
FRONT VIEW
FRONT VIEW
Dimensions in parentheses are in millimeters unless otherwise specified.
#7012423 - Revision A - August, 2009
2-8
Model UC-15I (Undercounter Ice Machine)
Installation Information
LEVELING
SIDE PANELS
1. Adjust the levelers close to desired height.
With the Sub-Zero ice machine, the side panels must
be securely fastened to the adjacent cabinets and floor.
2. Move the bin into its final position.
Panels should be fastened to the floor and walls using
’L’ brackets (hardware not provided). To help move the
unit into place, rout out an area in the floor so the ‘L’
bracket will sit flush with the floor level. Brackets and
screws are provided for mounting the unit to adjoining
cabinets and side panels.
3. Level the ice machine to assure that the bin door
closes and seals properly. Use a level on top of the
bin. Turn the base of each foot as necessary to
level the bin. Refer to the illustration below.
REVERSING THE DOOR SWING
The hinged side of the door may be reversed to the
other side if desired. The Sub-Zero ice machine is
shipped with the door hinged at the right. The door and
hinges are designed for placing the hinges on either
the right or the left side of the unit. Moving the hinges
to the left in the pre-drilled holes, allows the door to
pivot from the left side. Refer to the illustrations below.
Turn Clockwise
to Lower Unit
NOTE: The plastic molding which covers the top area
of the door, packaged with the ice machine, is required
for this procedure.
Adjusting Leveling Leg
1. To begin, remove the four screws that secure the
door hinges to the ice machine. Refer to the illustration below.
SECURE THE ICE MACHINE
To secure the ice machine, install two #8 x 1/2” flat
head screws through each hinge. Refer to the illustration below.
NOTE: Remove the shim located between the cabinet and bottom hinge, this shim will transfer to the
left side bottom hinge.
NOTE: If the door swing is to be changed, refer to
Reversing the Door Swing before securing the unit.
Step 1
Flat Head
Screws
Remove Door
Secure Ice Machine to Cabinets
(CONTINUED ON NEXT PAGE)
2-9
#7012423 - Revision A - August, 2009
Model UC-15I (Undercounter Ice Machine)
Installation Information
2. Remove the hinges from the door by removing the
four screws (two each hinge) that secure the hinges
to the door. Refer to the illustration below.
3. Remove the upper plastic trim piece (right hand
configured) from the door by removing the two
screws that secure it to the door. Then replace it
with left hand trim piece. Refer to illustration below.
6. Remove four screws from the front top rail. Refer
to the illustration below.
7. Pivot top rail end for end to expose the two left
hand top hinge screw holes and reinstall.
Step 6
4. Transfer the hinges to the left side of the door and
re-attach. The upper hinge will need to become the
lower hinge and the lower hinge will now need to
become the upper. Refer to the illustration below.
Step 4
Step 2
Step 3
Reversing Top Rail
8. Remove 2 screws from bottom trim plate and slide
to cover right hand hinge mounting screw holes and
expose left hand hinge mounting screw holes.
Refer to illustration below.
Step 2
Hinge Transfer
Remove Hinges
and Plastic Trim
5. Remove the top ice machine cover by removing the
two screws along the back of the unit. Refer to the
illustration below.
Step 5
Step 8
Repositioning Slide Rail
9. Install the door using the left-hand door mounting
holes. Install shim removed in step 1 between the
hinge and cabinet.
10. Check the operation of the door by opening.
Remove Top Cover
#7012423 - Revision A - August, 2009
2-10
Model UC-15I (Undercounter Ice Machine)
Installation Information
DOOR PANEL INSTALLATION
Be sure of the door panel size and placement before
proceeding with the installation. If there are questions,
contact the Sub-Zero dealer or cabinet supplier.
Instructions regarding sizing of the door panel are provided in the Sub-Zero design guide.
For door handle hardware, a D-style pull centered on
the edge opposite the door hinge side is recommended.
Screw heads may have to be countersunk to ensure
that the hardware does not interfere with the panel fitting flush with the unit door.
DOOR PANEL DIMENSIONS
Door Panel Width – 1/8” (3) reveal
15” (381)
Door Panel Height – 1/8” (3) reveal
4” (102) toe space
30-3/8” (772)
Door Panel Thickness
5/8” (16) min
Panel Preparation and Installation
1. Remove the handle side bracket attached to the
front of the door and set aside.
2. Place the door panel lying face down on a protected surface to ensure the front is not scratched or
damaged.
3. Position the template provided flush with the upper
edge of the panel. Be sure to follow the exact location for the RH or LH door position. Refer to the
illustration below.
NOTE The door panel is being viewed from the back
side in the illustration. The overall size of the panel
shown is the minimum size necessary to cover the door
of the unit. The exact measurements of the door panel
may vary depending on the particular installation being
followed.
Dimensions may vary +_ 1/8” (3).
4. Once the proper position for the hardware has been
located, mark the holes, remove template, and drill
pilot holes for mounting of the hardware.
PANEL DESIGN NOTE: Additional panel design information can be found in the Sub-Zero design guide.
Check our website at subzero.com.
NOTE: It is recommended to start the first few holes,
positioning the hardware, drilling remaining pilot holes,
and securing the mounting brackets with the #8 x 1/2”
screws. Refer to the illustrations below.
Door Panel Weight
15 lbs (6.8 kg) max
Exercise caution when drilling holes for hardware.
This is especially critical with inset panels.
Flush with Top and Side
of Panel
5. Install the panel onto door by engaging the tabbed
bracket to the door first and then sliding the hinge
side hardware over the positioning screws. There
will be will have a 1/4" inch adjustment, up and
down, side to side, with this hardware.
6. Once the panel is in place, attach the remaining #8
x 1/2" screws to the hinge side mounting bracket
and install decorative caps.
BACK SIDE
OF PANEL
Drill Template Position
Right-Hand Door Panel
2-11
BACK SIDE
OF PANEL
Right-Hand Door Panel
#7012423 - Revision A - August, 2009
Installation Information
Model UC-15I (Undercounter Ice Machine)
Hinge Cover Installation
If the reveal on the hinge side of the door panel is
less than 1/4", and the panel has a square corner,
severe finger pinching or damage to the unit may
occur.
90-Degree Door Stop Installation
Certain installations may require the door to stop at 90degree instead of the full 115-degrees. A door stop pin
is supplied with the unit. To install the 90-degree door
stop pin (Refer to illustration below)l:
1. Open door to approximately 80 degrees.
2. Insert 90-degree stop pin down through holes in
bottom hinge bracket.
3. Insert 90-degree stop pin up through holes in top
hinge bracket.
NOTE: The pins must be inserted until their heads
makes contact with the hinge brackets.
NOTES:
• Do NOT Install the hinge covers until after installation
of the ice machine is complete.
• The 90-degree door stop must be installed prior to
installing the hinge covers.
• If the 90-degree stop pins are installed, it will be necessary to remove the knock-outs from the hinge cover
opposite the head of the pin.
• Hinges must be free of dirt and grease before
attempting to install the hinge covers.
1. Remove backing paper from adhesive pads of
upper and lower hinge covers, then adhere covers
to top and bottom of each hinge bracket as shown
below.
2. The center hinge covers are magnetic. Install them
to center of each hinge bracket as shown illustration below.
4. Check for proper door operation.
Door Stop Pin
Knock-out
Hinge Cover Installation
90 Degree Door Stop
#7012423 - Revision A - August, 2009
2-12
Model UC-15I (Undercounter Ice Machine)
Theory of Operation
SECTION 3
THEORY OF OPERATION
3-1
#7012423 - Revision A - August, 2009
Theory of Operation
Model UC-15I (Undercounter Ice Machine)
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.
Pressing the POWER button a second time will de-activate the ice machine.
Automatic Ice Making Light (Blue Indicator Light)
The ICE light is illuminated when the ice machine is in the ice making position. The light is off when the ice machine
is in the clean cycle.
DELAY Start
Pressing the DELAY button will initiate a delay cycle. The ice machine will not run until delay time expires.
1.
Pressing the button once will illuminate the “2” hour yellow light and initiate a two hour delay period.
2.
Pressing the button a second time will illuminate the “4” hour yellow light and initiate a four hour delay period.
3.
Pressing the button a third time will illuminate the “8” hour yellow light and initiate an eight hour delay period.
4.
Pressing the button a fourth time will cancel the delay cycle.
CLEAN Button (Green Indicator Light)
Pressing the CLEAN button will initiate a clean cycle and de-activate the ICE light. The water system will enter a
fill/flush mode for approximately ninety (90) seconds, after which the CLEAN light will flash to indicate the proper
time to add ice machine cleaner or sanitizer.
REPLACE FILTER (Red Indicator Light)
When the ice machine completes 8000 freeze/harvest cycles the light will illuminate to indicate the filter needs
replacement. Depressing the CLEAN button for 6 seconds will reset the counter and light.
Power
Button
Power
Indicator Light
Delayed Start
Button
Ice Making
Indicator Light
Clean
Button
Cleaning
Indicator Light
Figure 3-1. Control Panel Layout
#7012423 - Revision A - August, 2009
3-2
Replace Filter
Indicator Light
Model UC-15I (Undercounter Ice Machine)
Theory of Operation
OPERATING SYSTEMS
• Capillary Tube: The warm liquid refrigerant travels
through the skinny capillary tube which is attached to
the suction tube and wrapped around the base of the
accumulator. As the warm liquid refrigerant travels
through the capillary tube it gives up heat to the cool
vapor refrigerant in the accumulator and to the cool
refrigerant gas traveling through the suction line. As
the refrigerant in the capillary tube gives up heat, the
pressure drops, so it is a low-pressure/cool liquid
before it enters the evaporator.
There are three operating systems in the ice machine:
• Refrigeration System
• Water System
• Electrical (Electronic Control) System
Refrigeration System
The following components have been listed in the order
of refrigerant flow, with an explanation of their function
as part of the refrigeration system. (See Figure 3-2)
• Evaporator: A dramatic pressure drop occurs as the
low-pressure/cool liquid refrigerant leaves the small
diameter capillary tube and enters the larger diameter
evaporator tubing, and the refrigerant begins to
vaporize. This vapor travels through the evaporator
absorbing heat from the water being sprayed on the
evaporator. This cool vapor then enters the accumulator.
• Compressor: The compressor creates a high side
and low side pressure difference in the refrigeration
system by compressing the refrigerant gas, thus raising the pressure and temperature. During the ice
making cycle the compressor pushes this high-pressure/high-heat gas to the condenser.
• Condenser: The high-pressure/high-heat gas travels
through the condenser, where the heat is dissipated
by cooler air being drawn over the condenser tubing
by the condenser fan. This changes the gas into a
high-pressure/warm liquid that then enters the filterdrier.
• Accumulator: Another pressure drop occurs as the
cool vaporized refrigerant leaves the evaporator tubing and enters the larger diameter accumulator tubing. Any liquid or vaporized refrigerant that may
remain at this point is converted to gas. The capillary
tube is wrapped around the accumulator base to give
up heat to the refrigerant in the accumulator before it
enters the suction line.
• Filter-Drier: The high-pressure/warm liquid travels
through the filter-drier, which removes moisture from
the refrigerant before it enters the capillary tube.
Accumulator
Evaporator
Suction Line
Hot Gas Valve
Filter Drier
Capillary Tube
Condenser
Compressor
Figure 3-2. Refrigeration System (During Ice Making Cycle)
3-3
• Suction Line: The cool gas travels through the suction line,
absorbing heat from the warm liquid refrigerant traveling through
the capillary tube. This assures
that it is a luke warm gas before
it enters the compressor, where
the process begins again.
NOTE: There is an additional component in the ice machine refrigeration system which is used during
the harvest cycle, this component is
called the hot gas solenoid valve.
Its function is described below:
• Hot Gas Valve: During a harvest
cycle, the hot gas solenoid valve
interrupts the flow of high-pressure / high-heat gas from the
compressor, diverting it past the
condenser, filter-drier and capillary tube, directly to the evaporator. This high-pressure/high-heat
gas warms the evaporator so that
the ice cubes release from the
cube molds.
#7012423 - Revision A - August, 2009
Theory of Operation
Model UC-15I (Undercounter Ice Machine)
Water System
The water system provides and recirculates the
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. (See
Figure 3-3)
Water Inlet Tube
Cube Molds (16)
Circulating
Pump
Spray
Nozzles
Drain
Reservoir
Water
Valve
Figure 3-3. Water System (Beginning of Ice Making Cycle)
Electrical (Electronic Control)
System
Power for the refrigeration system
and the water system in the model
UC-15I is provided through the
electronic control system. The
electronic control system also regulates the operational cycles of the
ice machine. Refer to the Wire
Diagram at right (See Figure 3-4).
NOTE: The models UC-15IP and
UC-15IPO have a drain pump that
is powered off of L1, so even when
the ice machine is switched OFF,
the pump can continue to pump
melted ice water to the drain.
Figure 3-4. Electrical System Wire Diagram
#7012423 - Revision A - August, 2009
3-4
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 icemaker will experience under normal conditions. Following the table, wire diagrams are used to illustrate which components are energized during each event and additional information is provided. For the freeze cycle and the harvest cycle, diagrams of the water system and refrigeration system are included to help illustrate what is happening
inside the ice machine during those cycles.
SEQUENCE OF OPERATION
SEQUENCE
(EVENT)
Water
Pump
Water
Inlet
Valve
Hot Gas
(Harvest)
Valve
Compressor
Fan
Motor
Duration
(RELAY)
(4)
(5)
(2)
(1)
(3)
Initial Start-up /
Start-up after
Automatic Shut-off
ON
ON
ON
OFF
OFF
175 Seconds
Refrigeration
System Start-up
ON
ON
ON
ON
ON
5 Seconds
ON
ON
* Automatically
Determined at
Beginning of
Freeze Cycle
** Automatically
Determined During
Last Minute of
Freeze Cycle
Until Bin Thermostat
Re-closes
Freeze Cycle
ON
OFF
OFF
Harvest Cycle
OFF
ON
ON
ON
ON
or
OFF
Automatic Shut-off
OFF
OFF
OFF
OFF
OFF
* Maximum freeze cycle allowed by electronic control is one-hundred and twenty (120) minutes.
** Minimum harvest cycle allowed by electronic control is sixty (60) seconds.
3-5
#7012423 - Revision A - August, 2009
Theory of Operation
Model UC-15I (Undercounter Ice Machine)
Initial Start-up /
Start-up after Automatic Shut-off
For 175 seconds (2.9 minutes) the water
pump, water inlet valve, and hot-gas (harvest) valve are energized (See Figure 3-5).
This is done for the following reasons:
1. The water pump will start to spray
water indicating the ice machine is on
and this also helps to clear the evaporator/cubes.
2. The water inlet valve opens, filling and
overflowing the water trough.
3. The harvest valve opens, helping to
equalize the refrigeration system before
ice production begin.
FUSE
HOT-GAS
HARVEST VALVE
CONTROL BOARD
WATER VALVE
BIN
THERMOSTAT
(CLOSED)
WATER
PUMP
Figure 3-5. Wire Diagram - Initial Start-up
Refrigeration System Start-up
For 5 seconds the compressor, condenser
fan motor, water pump, water inlet valve,
and hot-gas (harvest) valve are energized
(See Figure 3-6). The main reason for
leaving the harvest valve open at this time
is to start and run the compressor for 5 seconds unloaded. This lengthens the life of
the compressor.
COMPRESSOR
FUSE
HOT-GAS
HARVEST VALVE
CONTROL BOARD
CONDENSER
FAN MOTOR
WATER VALVE
BIN
THERMOSTAT
(CLOSED)
WATER
PUMP
Figure 3-6. Wire Diagram - Refrigeration System Start-up
#7012423 - Revision A - August, 2009
3-6
Model UC-15I (Undercounter Ice Machine)
Theory of Operation
Freeze (Ice Making) Cycle
During the freeze cycle, only the compressor, condenser fan motor and water pump
are energized (See Figure 3-7). The compressor pushes refrigerant through the
sealed system, the condenser fan draws air
through the condenser, and the circulating
pump pushed water through the spray nozzles to the cube molds (See Figure 3-8).
The refrigerant running through the evaporator absorbs heat from the water being
sprayed into the cube molds and the water
freezes. The heat that the refrigerant
absorbs from the water is carried in the
refrigerant back to the compressor and then
through the condenser where the heat is
transferred from the refrigerant to the air
being drown through the condenser by the
condenser fan. This warm air discharges
out through the left side of the kickplate.
As the freeze cycle runs, the electronic control monitors the temperature detected by
the thermistor attached to the liquid
line/condenser outlet (See Figure 3-7) and
calculates freeze time based on the the
amount of sub-cooling detected.
COMPRESSOR
FUSE
CONTROL BOARD
LIQUID LINE
THERMISTOR
BIN
THERMOSTAT
(CLOSED)
CONDENSER
FAN MOTOR
WATER
PUMP
Figure 3-7. Wire Diagram - Freeze (Ice Making) Cycle
NOTE: Maximum freeze
cycle is 120 minutes.
Cubes form in Molds
NOTE: The Water System
During Freeze Cycle - The
reservoir is initially filled with
approximately two quarts of
water, either following a harvest cycle or after an initial
start-up. During the ice making cycle, water is taken from
the reservoir and sprayed up
into the molds where it
freezes. However, water
containing mineral impurities
requires lower temperatures
to freeze, so the less pure
water falls back into the
reservoir while the purer
water freezes in the cube
molds. This causes the
water in the reservoir to
become highly concentrated
with mineral impurities at the
end of the freeze cycle.
Evaporator
(Removes Heat
from Water)
Circulating
Pump
(ON)
Spray
Nozzles
Reservoir
Hot Gas Valve
(CLOSED)
Water Valve
(CLOSED)
Compressor (ON)
Condenser Fan (ON)
Figure 3-8. Refrigeration and Water System Diagram - Freeze (Ice Making) Cycle
3-7
#7012423 - Revision A - August, 2009
Theory of Operation
Model UC-15I (Undercounter Ice Machine)
Harvest Cycle
During the last minute of the freeze cycle
the electronic control observes the temperature detected by the the thermistor on the
liquid line (See Figure 3-9), then calculates
and controls proper harvest duration.
COMPRESSOR
Once in a harvest cycle, the compressor
and condenser fan motor remain energized,
with the hot gas valve and water valve also
being energized, but the water pump is
switched off (See Figure 3-9).
During the harvest cycle the compressor
continues pushing refrigerant through the
sealed system, but with the hot gas valve
open, the high-pressure/high-heat gas from
the compressor is diverted to the evaporator instead of the condenser. The water
valve is opened to pour water over the top
of the evaporator and into the reservoir.
With the water pouring over the top of the
evaporator and the warm gas running
through the evaporator, the ice cubes
release from the cube molds and fall into
the storage bin.
FUSE
HOT-GAS
HARVEST VALVE
CONTROL BOARD
LIQUID LINE
THERMISTOR
WATER VALVE
BIN
THERMOSTAT
(CLOSED)
NOTE: Minimum harvest cycle is 60 seconds.
NOTE: If a problem with the
water system is encountered,
it is more likely to lead to
issues during the harvest
cycle before causing any
freeze issues.
CONDENSER
FAN MOTOR
Figure 3-9. Wire Diagram - Harvest Cycle
Water Inlet Tube
Cubes Release
from Molds
NOTE: The Water System
During Harvest Cycle Approximately three quarts of
water are added to the reservoir during the harvest cycle,
over-filling the reservoir by
approximately one quart.
The extra quart of water rinses the reservoir and goes
down the drain carrying the
mineral impurities.
Evaporator
(Warm Gas
Circulating)
Circulating
Pump
(OFF)
Reservoir
Over Fills
Drain
Hot Gas Valve
(OPEN)
Water Valve
(OPEN)
Compressor (ON)
Condenser Fan (OFF)
Figure 3-10. Refrigeration and Water System Diagram - Harvest Cycle
#7012423 - Revision A - August, 2009
3-8
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).
NOTE: The bin level thermostat cut-in is
40°F (4.5°C) and cut-out is 34°F (1.0°C).
CONTROL BOARD
BIN
THERMOSTAT
(OPEN)
Figure 3-11. Wire Diagram - Automatic Shut-Off
3-9
#7012423 - Revision A - August, 2009
Theory of Operation
Model UC-15I (Undercounter Ice Machine)
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.
Ice
The general shape of the ice cubes is octagonal and
tapered toward the top, with the base being approximately 1-1/4” wide, the top being approximately 1” wide
and the height being approximately 1-1/8” (See Figure
3-12). When the machine is adjusted properly, there
should be approximately 1/4” deep dimple in the base
of the cube. (See Cube Weight Adjustment later in this
section) The cubes will be wet when fresh, which is
normal. The cubes may also develop frost on the outside and look cloudy, this is also normal. (The frost will
disappear when liquid is poured over the cubes.)
Storage
Figure 3-12. Proper Cube Appearance
The ice storage bin is not refrigerated, but it is insulated, similar to a picnic cooler. If the ice bin were refrigerated, the cubes would freeze together into one large
cluster of ice. This would yield ice that is of very poor
quality and would be very difficult to remove from the
machine.
Run Time
The model UC-15I will continue to operate until the ice
builds up high enough to contact the bin thermostat
sensor tube, then it will switch OFF(See Figure 3-13).
The ice machine remains OFF until ice no longer contacts the bin thermostat bulb holder and the thermostat
bulb warms up. The increase in temperature will restart
the ice machine.
Bin Thermostat
Bulb Holder
The amount of time that the model UC-15I will run to
replace melted ice (without the door being opened) is
approximately four (4) hours per day.
Figure 3-13. Ice Bin Storage Level
The amount of time that the ice machine will run to
replace ice removed during use will depend upon how
much ice is removed, how often ice is removed, how
clean the ice machine is and how hot the ambient air
and water supplied to the ice machine are. An empty
ice bin will usually take twelve (12) to twenty-four (24)
hours to refill.
NOTE: The models UC-15IP and UC-15IPO have a
drain pump that is powered off of L1, so even when the
ice machine is switched OFF, the pump can continue to
pump melted ice water to the drain.
#7012423 - Revision A - August, 2009
3-10
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
is full. It is preset for normal ambient temperatures and
adjustments are usually not required.
The ice machine has been programmed to produce the
proper cube weight, based on average ambient air and
water temperatures. Cube weight can be increased
from the factory setting, reducing the amount of dimple
in the cube, by adjusting the freeze cycle finish time in
one (1) minute increments.
Testing the Bin Thermostat - The thermostat is functioning correctly if, when three ice cubes are placed on
the thermostat tube for 5 minutes, the ice machine
stops. The ice machine should restart 5 minutes after
the cubes are removed.
Adjusting the Bin Thermostat - If the ice machine
stops before the bin is full or runs after the bin is full,
ambient temperatures are probably high or low and the
bin thermostat can be adjusted as follows (See Figure
3-14):
Adjusting Freeze Cycle Finishing Time - To adjust
freeze cycle finish time press and hold the POWER button. While holding the POWER button, press and
release the CLEAN button once for each additional
minute of freeze cycle time desired. (See Figure 3-15)
Press
and
Hold
POWER IS SUPPLIED TO ICE MACHINE DURING
THIS PROCEDURE. AVOID CONTACT WITH THE
FAN BLADE AND THE ELECTRICAL CONNECTIONS.
1. To access the thermostat, extract the four kickplate
mounting screws and pull kickplate forward.
2. Turn the thermostat shaft clockwise to decrease the
level of ice before automatic shut-off; turn counterclockwise to increase the level of ice before automatic shut-off.
3. Reattach the kickplate.
Press Once for
each Additional
Minute Desired
Figure 3-15. Adjusting Freeze Cycle Finish Time
It is recommended to adjust in one (1) minute increments and allow the ice machine to run several
freeze/harvest cycles, then inspect the ice cubes. If a
heavier cube weight is desired add another minute of
freeze time and repeat the process.
NOTE: Five (5) minutes is the maximum additional
freeze time that can be added. Pressing the CLEAN
button 6 times will reset the finishing time to zero (0)
additional minutes.
Checking the Additional Freeze Cycle Time - To
check the number of minutes that have been added to
the freeze cycle time (See Figure 3-16):
1. Press and hold the POWER button for five (5) seconds.
2. Count number of times the ICE light flashes. Each
flash indicates an additional minute of freeze cycle
time.
Bin Thermostat
Press and
Hold for 5
Seconds
Figure 3-14. Bin Thermostat Adjustment
“ICE” Flashes Once
for each Additional
Minute Programmed
Figure 3-16. Checking for Additional Freeze
Cycle Finish Time
3-11
#7012423 - Revision A - August, 2009
Theory of Operation
Model UC-15I (Undercounter Ice Machine)
#7012423 - Revision A - August, 2009
3-12
Model UC-15I (Undercounter Ice Machine)
Maintenance/Cleaning/Adjust
SECTION 4
MAINTENANCE, CLEANING
AND ADJUSTMENT
INFORMATION
4-1
#7012423 - Revision A - August, 2009
Maintenance/Cleaning/Adjust
Model UC-15I (Undercounter Ice Machine)
ICE MAKER CLEANING & MAINTENANCE
Cleaning and maintenance should be performed a minimum of every six months (see the Recommended Cleaning /
Maintenance Schedule below). Basic cleaning and maintenance of the ice machine will increase its reliability,
enhance its performance, and help save on water and power consumption.
NOTES:
• Some water conditions will dictate more frequent cleaning of the ice making section, just as some carpets and pets
will dictate more frequent cleaning of the condenser.
• To ensure efficient operation, Sub-Zero recommends an annual cleaning be performed by a qualified service technician in which the ice machine is partially disassembled for a more thorough cleaning and sanitizing.
RECOMMENDED CLEANING / MAINTENANCE SCHEDULE
Weekly
Semi-Annually
(every 6 months)
After Prolonged
Shutdown
At Start-up
YES
YES
YES
YES
Clean and sanitize interior
YES
YES
YES
Replace water filter*
YES
YES
Clean condenser coil
YES
YES
YES
YES
M aintenance Event
Clean cabinet exterior
Check ice quality
YES
YES
* Poor water quality may require more frequent cleaning, sanitizing and water filter replacements.
Cleaning the Exterior
2. With a brush attachment, vacuum face of condenser while moving the brush up and down. (See
Figure 4-1)
Begin cleaning the exterior with mild soap and warm
water on a sponge to remove any dust and dirt (this
includes the door and door gasket). Wipe dry with a
clean, soft cloth. When cleaning stainless steel, use
cleaners designed for use with stainless steel products.
Never use plain steel wool or abrasive pads, as they
will scratch the panels.
Do not bend the metal fins of the condenser, doing
so will restrict airflow through the condenser, possibly causing mechanical failure of the ice maker.
Cleaning the Condenser
The condenser is located at the right side of the compressor area, behind the kickplate and it looks similar to
the radiator on a car. To clean the condenser, follow
the directions below:
DISCONNECT ELECTRICAL POWER TO ICE
MACHINE AT THE ELECTRICAL SERVICE SWITCHES BEFORE CLEANING THE CONDENSER.
Condenser
Figure 4-1. Condenser Cleaning
1. Extract four bolts holding kickplate and pull it forward (clean kickplate openings before replacing).
#7012423 - Revision A - August, 2009
3. After condenser is clean, reattach kickplate with the
mounting bolts.
4-2
Model UC-15I (Undercounter Ice Machine)
Maintenance/Cleaning/Adjust
Cleaning and Sanitizing the Interior
An in place cleaning/sanitizing procedure should be
performed every six (6) months.
ICE MACHINE
CLEANER
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. Prepare 1 tablespoon (15 ml) of undiluted ice
machine sanitizer (7013401 only) in a container that
will fit easily under lifted paddles (See Figure 4-7).
5. Press the CLEAN button again, this time to start the
sanitize cycle (See Figure 4-5).
In Place Cleaning / Sanitizing - This procedure
allows semi-annual in place cleaning and sanitizing of
the interior. The quality of the homes potable water
supply may call for more frequent cleaning intervals.
Use ice machine cleaner (#7013400) to remove lime
scale or other mineral deposits. Ice machine sanitizer
(#7013400) disinfects and removes algae and slime.
WEAR RUBBER GLOVES AND SAFETY GOGGLES
(AND/OR FACE SHIELD) WHEN HANDLING ICE
MACHINE CLEANER OR SANITIZER.
Figure 4-5. Start Sanitize Cycle, Press “CLEAN”
3. Wait 3 minutes until CLEAN light flashes (See
Figure 4-6), then add prepared sanitizer by lifting
water paddles and pouring directly into spray area
(See Figure 4-7). The ice machine automatically
times out a 10 minute sanitize cycle, followed by 8
rinse cycles, then stops. The CLEAN light switches
off to indicate the sanitize cycle is complete. This
entire cycle lasts about 30 minutes.
NOTE: Before beginning, removed all ice from the bin.
1. Prepare 4 oz (118 ml) of undiluted ice machine
cleaner (7013400 only) in a container that will fit
easily under lifted paddles (See Figure 4-4).
2. Press CLEAN button (See Figure 4-2). The ice
machine will initiate a 2 minute harvest to remove
any remaining ice from the evaporator. When that
ice falls in the bin, remove it from the bin.
CLEAN light flashes 1 minute, then steady ON for 30 minutes
Figure 4-6. Clean Light Flashes = Add Sanitizer
Figure 4-2. Start Clean Cycle, Press “CLEAN”
3. Wait 3 minutes until CLEAN light flashes (See
Figure 4-3), then add prepared cleaner by lifting the
water paddles and pouring directly into spray area
(See Figure 4-4). The ice machine automatically
times out a 10 minute cleaning cycle, followed by 8
rinse cycles, then stops. The CLEAN light switches
off to indicate the clean cycle is complete. This
entire cycle lasts about 30 minutes.
ICE MACHINE
SANITIZER
Figure 4-7. Pour Cleaner Into Spray Area
NOTE: The ice machine will automatically continue
from previous operational state before clean was initiated. If the unit was in an ice making cycle, it will start
making ice again; if it was OFF, it will switch back OFF.
CLEAN light flashes 1 minute, then steady ON for 30 minutes
Figure 4-3. Clean Light Flashes = Add Cleaner
4-3
#7012423 - Revision A - August, 2009
Maintenance/Cleaning/Adjust
Model UC-15I (Undercounter Ice Machine)
Disassembly Cleaning / Sanitizing - This procedure
should be performed by a qualified service technician
only, as it entails disassembly of the ice machine for a
more thorough cleaning and sanitizing.
5. Mix 1 oz (30 ml) sanitizer with 2 gallons (7.6 liters)
of warm water.
NOTE: Since this mixture will be divided into two
equal batches, halving the ingredients mentioned
above and mixing them in two separate vessels
may be helpful.
1. Perform an in place cleaning as described on page
4-3. The clean cycle takes about 30 minutes.
When the clean cycle is complete, disconnect
power to the unit and switch off water supply.
WEAR RUBBER GLOVES AND SAFETY GOGGLES
(AND/OR FACE SHIELD) WHEN HANDLING ICE
MACHINE CLEANER OR SANITIZER.
DISCONNECT ELECTRIC POWER TO THE ICE
MACHINE BEFORE PROCEEDING.
2. Mix 16oz (473 ml) of undiluted ice machine cleaner
(7013400 only) with 2 gallons (7.6 liters) of warm
water.
NOTE: Since this mixture will be divided into two
equal batches, halving the ingredients mentioned
above and mixing them in two separate vessels
may be helpful.
Do not mix Cleaner and Sanitizer solutions together. It is a violation of Federal law to use these solutions in a manner inconsistent with their labeling.
6. Use 1/2 of the sanitizer/water mixture to sanitize all
removed components. Use a cloth or sponge to liberally apply the solution to all surfaces of the
removed parts or soak the removed parts in the
sanitizer/solution. Rinsing is not required.
7. Use the other 1/2 of the sanitizer/water solution and
a sponge or cloth to sanitize the inside of ice bin.
Sanitize inside of door, door gasket, bin, top of
evaporator and evaporator bucket. Rinsing is not
required.
8. Replace all removed components.
9. Reapply power and water supply to the ice
machine, then perform an in place sanitizing as
described on page 4-3.
WEAR RUBBER GLOVES AND SAFETY GOGGLES
(AND/OR FACE SHIELD) WHEN HANDLING ICE
MACHINE CLEANER OR SANITIZER.
Do not mix Cleaner and Sanitizer solutions together. It is a violation of Federal law to use these solutions in a manner inconsistent with their labeling.
3. After removing all parts as described in Removal of
Parts for Cleaning and Sanitizing, take components
to a sink for cleaning. Use 1/2 of the cleaner/water
mixture to clean all components. The cleaner solution will foam when it contacts lime scale and mineral deposits; once the foaming stops, use a softbristle nylon brush, sponge or cloth (NOT a wire
brush) to carefully clean the parts. Disassemble
the spray bar, remove nozzles and inserts and soak
for 5 minutes. For heavily scaled parts, soak in
solution for 15 – 20 minutes. Rinse all components
with clean water.
Do not immerse the water pump motor in the cleaning or sanitizing solution.
4. While components are soaking, use the other 1/2 of
the cleaner/water solution and a nylon brush or
cloth to clean inside of ice bin. Clean inside of
door, door gasket, bin, top of evaporator and evaporator bucket. Rinse all areas thoroughly with clean
water.
#7012423 - Revision A - August, 2009
4-4
Model UC-15I (Undercounter Ice Machine)
REMOVAL OF PARTS FOR CLEANING
AND SANITIZING
Maintenance/Cleaning/Adjust
Screws
Top Cover
Removal of parts for the recommended annual cleaning
and sanitizing should be performed by a qualified service technician only.
Before beginning to remove components, perform an in
place cleaning as described on page 4-3. The clean
cycle takes about 30 minutes. When the clean cycle is
complete, disconnect power to the unit and switch off
the water supply. Also read the entire Disassembly
Cleaning / Sanitizing procedure on page 4-4.
Figure 4-8. Top Cover Removal
DISCONNECT ELECTRIC POWER TO THE ICE
MACHINE BEFORE PROCEEDING.
Screw
Top Cover Removal
To remove the top cover (See Figure 4-8):
Splash
Shield
1. Extracting two screws along the back of cover.
2. Lift back edge of the top cover up slightly.
3. Pull top cover towards rear of unit until the retaining
clips at front disengage from top cover, then lift it off
of the unit.
Splash Shield Removal
Figure 4-9. Splash Shield Removal
The splash shield is held in place with the same screw
that secures the control box cover. To remove the
splash shield, the top cover will first need to be
removed, then extract the screw and lift the splash
shield straight up (See Figure 4-9).
Evaporator
Cover
Water Shutter Assembly Removal
The water shutter assembly (consisting of evaporator
cover, water paddles and paddle rod) is designed to
keep the spraying water from escaping the
evaporator/spray bar enclosure. A steel rod which supports the water shutters sits in grooves molded into the
evaporator cover.
Paddles
To remove the water shutter assembly, the top cover
will need to be removed first, then (See Figure 4-10):
Figure 4-10. Water Shutter Assy Removal
1. Reach inside bin area and pull evaporator/spray bar
enclosure forward approximately 1/2” (13 mm).
2. Grasp both ends of evaporator cover and lift
assembly straight up.
3. The rod and paddles can now be pulled from the
grooves in the evaporator cover.
4-5
#7012423 - Revision A - August, 2009
Maintenance/Cleaning/Adjust
Model UC-15I (Undercounter Ice Machine)
Ice Chute Removal
The ice chute is positioned over the spray nozzles and
allows the ice to easily fall into the bin.
Ice Ramp
To remove the ice chute, grab protruding spray hole on
one end, lift up and pull forward out of evaporator/spray
bar enclosure (See Figure 4-11)
NOTE: When reinstalling ice chute, it must be firmly
positioned over the spray bar, with the front edge inside
the water trough. Spray nozzles must be align with the
spray holes or spray water will fall into the bin.
Figure 4-11. Ice Ramp Removal
Water Trough Drain Tube and Standpipe/Overflow
Tube Removal
To remove the drain tube and overflow tube (See Figure
4-12):
1. At top of drain tube, disengage tube clamp teeth
and remove clamp from tube and water trough nipple.
2. Pull drain tube up out of bin drain.
3. Pull drain tube and standpipe/overflow tube down
out of water trough (water in the trough will drain
into the bin).
4. Remove standpipe/overflow tube from drain tube by
pulling.
Water Trough
Clamp
Standpipe /
Overflow Tube
Drain Tube
Water Trough Removal
Figure 4-12. Drain Tube & Overflow Tube Removal
To remove the water trough (See Figure 4-13):
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.
Water Trough
Figure 4-13. Water Trough Removal
#7012423 - Revision A - August, 2009
4-6
Model UC-15I (Undercounter Ice Machine)
Spray Bar Assembly Removal and Disassembly
Water
Nozzle
Nozzle
Insert
To remove the spray bar assembly, the ice chute and
water trough will need to be removed first, then (See
Figure 4-14):
Maintenance/Cleaning/Adjust
Clamp
Water
Pump
1. At water pump outlet, disengage tube clamp teeth
and remove clamp from tube and pump outlet, then
pull tube up off of pump outlet.
2. Lift spray bar assembly up and pull forward out of
evaporator/spray bar enclosure.
3. With spray bar assembly removed, disengage
clamp from tube at spray bar inlet, then pull tube
from spray bar.
4. Unscrew water nozzles from spray bar.
5. Pull nozzle inserts out from spray bar outlets.
Spray Bar Assy
Clamp
Figure 4-14. Spray Bar Removal & Disassembly
NOTES:
• The spray bar also disassembles for easy cleaning.
• When reassembling, apply food grade lubricant to
spray bar components when necessary.
Electrical
Connections
Water Pump Removal
To remove the water pump, first remove the ice chute,
water trough and spray bar assembly, then (See Figure
4-15):
Ground Wire
and Screw
Water
Pump
1. From inside ice bin, extract the mounting screw and
eccentric washer securing water pump to upper bin
liner.
2. Grasp pump and pull straight down until water
pump disengages and electrical connector is visible, then disconnect electrical leads.
3. Extract grounding screw and wire from top of pump
and pull pump from bin.
Mounting Screw
and Washer
Figure 4-15. Water Pump Removal
Do not immerse the water pump motor in the cleaning or sanitizing solution.
4-7
#7012423 - Revision A - August, 2009
Maintenance/Cleaning/Adjust
Model UC-15I (Undercounter Ice Machine)
REMOVAL FROM SERVICE/ LONG TERM
STORAEG / WINTERIZATION
WATER FILTER REPLACEMENT
To replace the water filter, incoming water does not
need to be turned off. Follow the procedure below (See
Figure 4-16):
Special precautions must be taken if the ice machine is
to be switched off for an extended period of time and/or
exposed to ambient temperatures of 32°F (0°C) or
below.
1. To remove, turn the filter 1/4 turn counterclockwise
and it will pop out.
2. To install, push filter in while turning clockwise.
Follow the procedure below:
1. To prevent mildew growth, perform an in place
cleaning and sanitizing as described on page 4-3.
2. Disconnect the electric power at the circuit breaker
or the electric service switch.
3. Turn off the water supply.
4. Remove the water from the water trough.
5. Disconnect and drain the incoming ice-making
water line at the rear of the ice machine.
6. Disconnect vinyl hose from water pump and allow
to drain.
7. Make sure water is not trapped in any of the water
or drain lines. Compressed air can be used to blow
out the lines.
8. Mix 0.5 oz (15 ml) of undiluted ice machine sanitizer (7013401 only) with 1 gallons (3.8 liters) of warm
water.
9. Put the sanitizer solution into a spray bottle and
spray all interior surfaces, but do NOT rinse, allow
to air dry.
10. Block the door partially open to provide air
exchange and prevent mildew growth.
Turn filter 1/4 turn counterclockwise to remove
Water Filter
Figure 4-16. Water Filter Removal
If water is allowed to remain in the ice machine in
freezing temperatures, severe damage to some
components could result. Damage of this nature is
not covered by the warranty.
#7012423 - Revision A - August, 2009
4-8
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)
from the factory setting by adjusting the freeze cycle finish time.
Cube weight increases or decreases depending on the
amount of dimple in the cube.
To check for additional finish time (See Figure 4-18):
Figure 4-17. Ice Cube Weight
1. Press and hold the POWER button for five (5) seconds.
2. Count the flashes on the ICE light. The light will
flash once for each additional minute of freeze
cycle time.
Count ICE Flashes
Press and hold POWER for 5 seconds
To adjusting finishing time (See Figure 4-19):
Figure 4-18. Check for Additional Finish Time
1. Press and hold the POWER button.
2. Press and release the CLEAN button once for each
additional minute of freeze cycle time desired.
3. Adjust in one (1) minute increments and allow the
ice machine to run several freeze/harvest cycles,
then inspect the ice cubes. If a heavier cube
weight is desired add another minute of freeze time
by repeating the process.
Press and hold
POWER
Press CLEAN
up to 5 times
Figure 4-19. Adjust Finish Time / Freeze Cycle
NOTE: Five minutes is the maximum additional finish time that can be added. Pressing the CLEAN
button 6 times will reset the finishing time to zero
(0) additional minutes.
Bin
Thermostat
Tube
Testing and Adjusting Bin Thermostat
The bin thermostat stops ice production when the bin is
full, with ice touching the bin thermostat tube. (See
Figure 4-20)
The thermostat is functioning correctly if, when three ice
cubes are placed on the thermostat tube for 5 minutes,
the ice machine stops. The ice machine should restart
5 minutes after the cubes are removed.
Figure 4-20. Bin Thermostat Tube Location
If ice production stops before the bin is full or continues
after bin is full, the bin thermostat can be adjusted as
follows (See Figure 4-21):
1. Extract four bolts holding kickplate and pull it forward.
2. Turn thermostat adjustment screw counterclockwise
to decrease the level of ice; turn clockwise to
increase the level of ice.
3. Reassemble the kickplate.
Bin Thermostat Adjustment screw
Figure 4-21. Bin Thermostat Adjustment
4-9
#7012423 - Revision A - August, 2009
Maintenance/Cleaning/Adjust
Model UC-15I (Undercounter Ice Machine)
#7012423 - Revision A - August, 2009
4-10
Model UC-15I (Undercounter Ice Machine)
Component Access / Removal
SECTION 5
COMPONENT ACCESS
AND REMOVAL
5-1
#7012423 - Revision A - August, 2009
Component Access / Removal
Model UC-15I (Undercounter Ice Machine)
COMPONENT ACCESS AND REMOVAL
This section explains how to access and remove model UC-15I cosmetic, mechanical and sealed system components. 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. When following a component removal
procedure, it may be necessary to reference another component removal procedure listed earlier in this section.
Page:
This section is arranged as follows:
•
•
•
•
•
Exterior Components ........................................................................................................................................... 5-3
Components Below Top Cover (Excluding Sealed System Components) .......................................................... 5-8
Interior Components ........................................................................................................................................... 5-10
Compressor / Condenser Area Components ..................................................................................................... 5-12
Sealed System Components ....................................................................................................................
5-15
NOTE: Before continuing, please take note of the WARNINGS and CAUTIONS below.
TO AVOID ELECTRIC SHOCK, POWER TO THE UNIT MUST BE DISCONNECTED WHENEVER ACCESSING
AND/OR REMOVING COMPONENTS POWERED BY ELECTRICITY OR COMPONENTS NEAR OTHER ELECTRICAL COMPONENTS.
• If removing or disconnecting door hinge assemblies, remember they are spring loaded and may recoil
quickly when released.
• If working in the compressor area, remember that compressor and tubing may be hot.
• If working on or around the condenser, remember that condenser fins and fan blade are sharp.
#7012423 - Revision A - August, 2009
5-2
Model UC-15I (Undercounter Ice Machine)
Component Access / Removal
Exterior Components
Kickplate Removal
The kickplate is held in place with four screws, two
along each side. To remove the kickplate, extract the
screws and pull the kickplate forward. (See Figure 5-1)
Kickplate
Screws
Door Panel Removal
Figure 5-1. Kickplate Removal
The handle-side panel mounting bracket is attached to
the back side of the door panel with screws. The tabs
of the handle-side bracket then slide into slots in the
face of the door. Screws passing through the top and
bottom panel mounting brackets, from back to front, into
the door panel hold the panel tight to the door.
Door/Hinge
Cover
Top
Bracket
To remove a door panel (See Figure 5-2):
1. Open the door, then extract the door panel mounting screws from bottom and top brackets.
2. Slide panel towards the hinge side to disengage the
handle-side bracket from slots in face of door.
Door Panel Mounting Brackets and Door Hinge
Cover Removal
r
Doo l
e
Pan
The top and bottom panel mounting brackets, as well
as the door hinge cover are attached to the face of the
door with screws.
Bottom Bracket
To remove a panel bracket or door hinge cover, the
door panel will need to be removed first. Then, extract
the bracket or hinge cover mounting screws and pull
the bracket or hinge cover form the face of the door
(See Figure 5-2).
Handle-Side Bracket
Figure 5-2. Panel Mount Hardware
& Upper Door/Hinge Cover Removal
Door Gasket Removal
The door gasket has a rib on its back side that fits into
a channel in the door liner.
To remove the door gasket, open the door and pull the
gasket from the channel in the door liner (See Figure 53).
Door
Gasket
Figure 5-3. Door Gasket Removal
5-3
#7012423 - Revision A - August, 2009
Component Access / Removal
Model UC-15I (Undercounter Ice Machine)
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.
To remove the door (See Figure 5-4):
1. Remove the door panel.
2. Extract the door mounting screws from the bottom
and top hinge assemblies, then pull the door from
the unit.
Door
Door
Mounting
Screws
NOTE: To remove the door with the hinges, see Hinge
Assembly Removal instructions below, following steps 3
through 5 for both hinges.
Hinge Assembly Removal
Figure 5-4. Door Removal
The hinges are secured to the unit with screws that
pass through the hinge assembly, a hinge spacer
behind each hinge, and into the cabinet frame.
Keyhole Slot With Screw
To remove a door hinge assembly (See Figure 5-5):
1.
2.
3.
4.
5.
Remove the door panel.
Remove the door.
Extract outer most hinge screw from hinge bracket.
Loosen the screw at keyhole slot of hinge bracket.
Slide hinge assembly toward hinge side of unit until
screw head clears the keyhole slot, then pull hinge
assembly from the unit.
Extract Screw First
Figure 5-5. Hinge Removal
Bottom Hinge Shown
Trim Plate / Slide Cover Bracket Removal
The trim plate / slide cover bracket is held in place by
screws passing through the front flanges of the side
panels into the bracket. There are also screws that
pass up through the trim plate and slide cover into the
filter panel
Screws
To remove the trim plate and slide cover bracket, the
kickplate, door and lower hinge assembly must be
removed first, then (See Figure 5-6):
1.
Extract the screws that hold the bracket to the side
panels and filter panel.
2. Lean the bracket forward, then pull the bracket from
behind the side panels and remove from unit.
Screws
Figure 5-6. Trim Plate / Slide Cover Removal
#7012423 - Revision A - August, 2009
5-4
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.
Water Filter Panel
To remove the water filter panel, first remove the kickplate, door, lower hinge assembly and trim plate and
slide cover bracket. Then, (See Figure 5-7):
1.
2.
Extract the water filter
Slide filter panel down and pull it away from unit.
Top Cover Removal
To remove the top cover (See Figure 5-8):
Figure 5-7. Water Filter Panel Removal
1. Extracting two screws along the back of cover.
2. Lift back edge of the top cover up slightly.
3. Pull top cover towards rear of unit until the retaining
clips at front disengage from top cover, then lift it off
of the unit.
Screws
Top Cover
Upper Back Panel Removal
The upper back panel is attached to the rear of the unit
with screws around its perimeter.
To remove the upper back panel, remove the unit’s top
cover first, then extract the screws securing the back
panel to the rear of the unit (See Figure 5-9).
Figure 5-8. Top Cover Removal
Screws
Figure 5-9. Upper Back Panel Removal
5-5
#7012423 - Revision A - August, 2009
Component Access / Removal
Model UC-15I (Undercounter Ice Machine)
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.
• The power cord passes through a strain relief bushing in the utility panel. These directions allow for the
power cord to remain attached to the utility panel.
Screws
To remove the utility panel (See Figures 5-10 & 5-11):
1. Pull the drain hose from the drain tube.
2. Turn the drain tube until its tabs can be pushed into
the compressor area.
3. Extract the screw securing the water inlet line tube
clamp to the lower utility panel.
4. Extract the utility panel mounting screws.
5. Pull lower utility panel away from unit while feeding
water inlet tube through hole in panel; stop when
power cord electrical connections become taught.
6. Disconnect power cord electrical leads from the unit
wire harness.
7. Extract the power cord grounding screw and pull
lower utility panel from back of unit.
Figure 5-10. Lower Rear Panel Removal
Electrical
Connections
Strain
Relief
Bushing
Power Cord Removal
The power cord passes through a strain relief bushing
in the lower utility panel.
Figure 5-11. Power Cord Removal
To remove the power cord (See Figure 5-11):
1. Extract the screw securing the water inlet line tube
clamp to the utility panel, then extract the panel
mounting screws.
2. Pull lower utility panel away from unit while feeding
water inlet line through hole in panel; stop when the
power cord electrical connections become taught.
3 Disconnect power cord electrical leads from the unit
wire harness and extract the power cord grounding
screw.
4. With a pliers, squeeze the strain relief bushing
together at the back side of the utility panel while
pushing the bushing through the hole in the panel.
#7012423 - Revision A - August, 2009
5-6
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.
To remove the front top rail, the door, upper hinge
assembly and top cover must be removed first, then
(See Figure 5-12):
Screws
1. Extract the screws from each end of the top rail.
2. Grasp the top rail from both sides and pull upward.
Figure 5-12. Front Trim Rail Removal
5-7
#7012423 - Revision A - August, 2009
Component Access / Removal
Model UC-15I (Undercounter Ice Machine)
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
board, main control board, transformer, bin light fixture
and switch.
Splash
Shield
Splash Shield Removal
The splash shield is held in place with the same screw
that secures the control box cover. To remove the
splash shield, the top cover will first need to be
removed, then extract the screw and lift the splash
shield straight up (See Figure 5-13):
Figure 5-13. Splash Shield Removal
Evaporator
Cover
Water Shutter Assembly Removal
The water shutter assembly (consisting of evaporator
cover, water paddles and paddle rod) is designed to
keep the spraying water from escaping the
evaporator/spray bar enclosure. A steel rod which supports the water shutters sits in grooves molded into the
evaporator cover.
Paddles
To remove the water shutter assembly, the top cover
will need to be removed first, then (See Figure 5-14):
Figure 5-14. Water Shutter Assy Removal
1. Reach inside bin area and pull evaporator/spray bar
enclosure forward approximately 1/2” (13 mm).
2. Grasp both ends of evaporator cover and lift
assembly straight up.
3. The rod and paddles can now be pulled from the
grooves in the evaporator cover.
Screw
Control Box Cover
Control Box Cover Removal
Front Trim Rail
The control box cover is concealed by the unit’s top
cover. It is held in place with it’s front edge under the
front trim rail and a screw that passes through the
splash shield and the cover, into the back mounting
hole in the control box.
Figure 5-15. Control Box Cover Removal
To remove the control box cover, the unit’s top cover
must first be removed, then (See Figure 5-15):
1. Extract control box cover mounting screw.
2. Lift back of cover up slightly, pull toward rear of
unit, then lift it up off of control box.
#7012423 - Revision A - August, 2009
5-8
Model UC-15I (Undercounter Ice Machine)
User Interface Board Removal
Component Access / 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.
2.
Disconnect all electrical leads from user interface
board at Molex connector.
With one hand, flex the front panel away from user
interface board; with other hand, pull board upward
until user interface board is free from retainer clips.
Electrical Leads
Filter Indicator Removal
User Interface Board
To remove the filter indicator, the top cover and control
box cover must be removed first, then (See Figure 517):
1.
2.
Figure 5-16. Control Box Components
Disconnect indicator leads from main control board.
Pull filter indicator out of its installation position and
up out of control box.
Control Board
Screws
Transformer
Transformer Removal
To remove the transformer, the top cover and control
box cover must be removed first, then (See Figure 517):
1.
2.
Disconnect ground wire from the transformer wire
harness and transformer leads from main board.
Extract transformer mounting screws and lift transformer from control box.
Transformer
Connection
Control Interface Board
Filter Indicator
Figure 5-17. Control Box Components
Light Fixture Removal
To remove the light fixture, the top cover and control
box cover must be removed first, then (See Figure 518):
1.
2.
Light Fixture
Connection
Disconnect wire leads from main control board.
Pinch top of fixture while lifting it from the bottom of
control box.
Light Fixture
Main Control Board Removal
To remove the main control board, the top cover and
control box cover must be removed first, then (See
Figure 5-18):
1.
2.
Screws
Disconnect all wires from the control board.
Extract the control board mounting screws and lift
board from bottom of control box.
Figure 5-18. Control Box Components
5-9
#7012423 - Revision A - August, 2009
Component Access / Removal
Model UC-15I (Undercounter Ice Machine)
Interior Components
Water Paddle Removal
ver
ator Co
Evapor
The water paddles reduce the spraying water escaping
the evaporator compartment. A steel rod which supports the water paddles sits in grooves molded into the
evaporator cover.
NOTE: Also see Water Shutter Assembly Removal
under Components Below Top Cover.
Water
Paddles
To remove the water paddles (See Figure 5-19):
Remove Rod
From Groove
1. Grasp both ends of water paddle assembly.
2. Lift one end of of water paddle assembly up while
pivoting forward.
3. After first end is disengaged, pull other end forward
to disengage rod from groove and pull assembly
from bin area.
NOTE: The individual water paddles will slide off
steel rod unless held at both ends while removing.
Figure 5-19. Water Paddle Removal
Ice Ramp
Ice Chute Removal
The ice chute is positioned over the spray nozzles and
allows the ice to easily fall into the bin.
To remove the ice chute, grab protruding spray hole on
one end, lift up and pull forward out of evaporator/spray
bar enclosure (See Figure 5-20)
Figure 5-20. Ice Ramp Removal
NOTE: When reinstalling ice chute, it must be firmly
positioned over the spray bar, with the front edge inside
the water trough. Spray nozzles must be align with the
spray holes or spray water will fall into the bin.
Water Trough
Water Trough Drain Tube and Standpipe/Overflow
Tube Removal
Clamp
Standpipe /
Overflow Tube
To remove the drain tube and overflow tube (See Figure
5-21):
1. At top of drain tube, disengage tube clamp teeth
and remove clamp from tube and water trough nipple.
2. Pull drain tube up out of bin drain.
3. Pull drain tube and standpipe/overflow tube down
out of water trough (water in the trough will drain
into the bin).
4. Remove standpipe/overflow tube from drain tube by
pulling.
#7012423 - Revision A - August, 2009
Drain Tube
Figure 5-21. Drain Tube & Overflow Tube Removal
5-10
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.
Water Trough
Spray Bar Assembly Removal and Disassembly
To remove the spray bar assembly, the ice chute and
water trough will need to be removed first, then (See
Figure 5-23):
Figure 5-22. Water Trough Removal
1. At water pump outlet, disengage tube clamp teeth
and remove clamp from tube and pump outlet, then
pull tube up off of pump outlet.
2. Lift spray bar assembly up and pull forward out of
evaporator/spray bar enclosure.
3. With spray bar assembly removed, disengage
clamp from tube at spray bar inlet, then pull tube
from spray bar.
4. Unscrew water nozzles from spray bar.
5. Pull nozzle inserts out from spray bar outlets.
Water
Nozzle
Nozzle
Insert
Clamp
Water
Pump
Spray Bar Assy
NOTES:
• The spray bar also disassembles for easy cleaning.
• When reassembling, apply food grade lubricant to
spray bar components when necessary.
Clamp
Figure 5-23. Spray Bar Removal & Disassembly
Water Pump Removal
To remove the water pump, first remove the ice chute,
water trough and spray bar assembly, then (See Figure
5-24):
Electrical
Connections
1. From inside ice bin, extract the mounting screw and
eccentric washer securing water pump to upper bin
liner.
2. Grasp pump and pull straight down until water
pump disengages and electrical connector is visible, then disconnect electrical leads.
3. Extract grounding screw and wire from top of pump
and pull pump from bin.
Ground Wire
and Screw
Water
Pump
Mounting Screw
and Washer
Figure 5-24. Water Pump Removal
5-11
#7012423 - Revision A - August, 2009
Component Access / Removal
Model UC-15I (Undercounter Ice Machine)
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 mounting bracket with a screw.
Disconnect
Water Line
Screw
To remove the water valve, first remove the kickplate,
then (See Figure 5-25):
1. Turn water supply off.
2. Disconnect water lines from front of valve by pushing collar around tube in while pulling tube away
from valve.
3. Extract screw securing water valve to mounting
bracket and pull valve forward.
4. Disconnect electrical connection from rear of valve.
5. Disconnect water lines from back of valve by pushing collar around tube in while pulling tube away
from valve.
Figure 5-25. Water Valve Removal
Rear
Tab
Rear
Tab
Water Filter Enclosure and Head Removal
The water filter enclosure has flanges that engage four
tabs on the bottom of the ice bin. Screws secure the
water filter head to the bottom of the ice bin. The water
inlet line connects to the right side of the head, and the
water line exiting the head runs to the water valve.
Disconnect
Water Line
To remove the water filter enclosure and head, first
remove the kickplate, door, lower hinge assembly, trim
plate, slide cover bracket and water filter panel. Then,
(See Figure 5-26):
Screws
Figure 5-26. Water Valve Head Removal
1.
2.
Turn water supply off.
Remove enclosure by pressing in on both sides just
below rear tabs and pushing towards rear of unit
until enclosure is free of tabs, then pull forward.
3. Disconnect water inlet line from right side of water
filter head by pushing collar around tube toward
head while pulling tube away from head.
4. Extract screws securing water filter head to bottom
of ice bin.
5. Pull water filter head forward and disconnect outlet
line from left side of head by pushing collar around
tube toward head while pulling tube away from
head.
#7012423 - Revision A - August, 2009
Disconnect
Water Line
5-12
Model UC-15I (Undercounter Ice Machine)
Component Access / Removal
Ice Bin Level (Thermostat) Switch Removal
Thermostat
Capillary Tube
The ice bin level switch is is located on the lower right
front of the unit behind the kickplate, secured to a
bracket with a nut. The thermostat capillary tube runs
from the rear of the switch to the back of the unit, then
up to a hole in the foam and into the back of the bin
thermostat sensing tube on the left side of the bin.
Electrical
Leads
Switch
Nut
To remove the ice bin level switch, first remove the kickplate and upper back panel, then (See Figure 5-27):
1. Disconnect electrical leads from ice bin level switch.
NOTE: It is recommended to label the wire leads to
assist in proper re-connection.
2. Extract nut that secures ice bin level switch to
bracket.
3. At rear of unit, remove silicone sealant that seals
capillary tube to foam.
4. Inside ice bin, remove silicone sealant at each end
of thermostat sensing tube.
5. Push thermostat sensing tube toward rear of bin
and out through hole in foam, then pull ice bin level
switch from front of unit.
Bracket Mounting Screws
Figure 5-27. Ice Bin Level Switch Removal
Screw
Solenoid Coil
Hot Gas Valve Solenoid Removal
The hot gas valve solenoid is attached to the top of the
hot gas valve body with a screw.
Valve Body
To remove the hot gas valve solenoid, first remove the
upper back panel and lower back utility panel from the
rear of the unit, then (See Figure 5-28):
1.
2.
Disconnect solenoid electrical leads.
Extract solenoid mounting screw and lift solenoid
from valve body.
Figure 5-28. Hot Gas Valve Solenoid Removal
Drain Pump Assembly Removal
(UC-15IP & UC-15IPO Only)
Disconnect
Tubing
The drain pump assembly is located behind the condenser at the right rear corner of the compressor area,
adhered to the tray with double-stick tape.
To remove the drain pump assembly, first remove the
upper back panel and lower back utility panel from the
rear of the unit, then (See Figure 5-29):
Drain
Pump
1. Disconnect inlet, discharge and vent tubes from top
of drain pump.
2. Pry pump assembly up form tray, then pull it toward
rear of unit until electrical leads are exposed.
3. Disconnect electrical leads and pull drain pump
assembly from unit.
Figure 5-29. Drain Pump Removal
5-13
#7012423 - Revision A - August, 2009
Component Access / Removal
Model UC-15I (Undercounter Ice Machine)
Liquid Line Thermistor Removal
The liquid line thermistor plugs directly into the control
board, with its leads running to the right, then toward
the rear of the unit under the top flange of the right side
panel, down the back of the unit to the condenser discharge/liquid line where it is held to the tubing with a
tube clamp. Foam insulation is then wrapped around
the thermistor and tubing, secured with cable ties.
Thermistor
Wire
To remove the liquid line thermistor, first remove the top
cover, control box cover, upper back panel and lower
back utility panel (if a pump model, also remove the
drain pump at this time), then (See Figure 5-30):
Cut Cable Tie
Insulation Wrap
Cut Cable Tie
1.
2.
At top of unit, unplug thermistor from control board.
At condenser discharge tube, cut cable ties securing insulation over thermistor and remove insulation.
3. Loosen tube clamp and pull thermistor from clamp,
then work it up toward top of unit, and out from
under top flange of right side panel toward front of
unit.
NOTE: When reinstalling thermistor, it must be attached
to the condenser outlet with the tube clamp, and the
insulation must be reapplied around the thermistor with
cable ties.
Figure 5-30. Liquid Line Thermistor Removal
Fan Motor
Screws
Condenser Fan Motor Assembly Removal
The condenser fan motor is secured with screws that
pass through the fan motor mounting bracket and into
the condenser side brackets.
Fan
Motor
Electrical
Leads
To remove the condenser fan motor assembly, first
remove the kickplate, door, lower hinge assembly, trim
plate, slide cover bracket, water filter panel, back panel
and lower back utility panel (if a pump model, also
remove the drain pump at this time), then (See Figure
5-31):
1. Disconnect fan motor electrical leads.
2. Extract screws securing condenser fan motor
mounting bracket to each condenser side bracket.
3. Pull fan motor assembly from compressor area.
4. Extract screws securing fan motor to mounting
bracket, then motor from mounting bracket.
#7012423 - Revision A - August, 2009
Figure 5-31. Condenser Fan Motor Removal
5-14
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 discharge line, after a T-connector. The outlet of the valve
is the hot gas tube that runs up to the evaporator.
To remove the hot gas valve, first remove the kickplate,
back panel and lower back utility panel, then after capturing the refrigerant from the sealed system (See
Figure 5-32):
Cut inlet and
outlet tubes
approximately
1” from hot gas
valve body.
1. Disconnect solenoid electrical leads.
2. Using a tube cutter, cut valve inlet and outlet tubes
approximately 1” from valve body.
NOTE: Do not sweat tubing apart. Doing so will
induce moisture into the sealed system.
3. Lift valve assembly from compressor area.
Figure 5-32. Hot Gas Valve Removal
NOTE: Always replace the filter-drier when opening the
sealed system for service.
Cut Here
High-Side Filter-Drier Removal
The high-side filter-drier is attached between the condenser outlet and the capillary tube, located behind the
condenser assembly.
High-Side
Filter-Drier
To access the high-side filter-drier, To remove the highside filter-drier, first remove the kickplate, back panel
and lower back utility panel, then after capturing the
refrigerant from the sealed system (See Figure 5-33):
Cut Here
1. Using a tube cutter, cut drier inlet tube approximately 1” from drier.
2. Using a file, score a line around the capillary tube
approximately one inch from filter-drier, then fatigue
the capillary tube at this point until it separates.
NOTES:
• Do not sweat tubing apart. Doing so will induce
moisture into the sealed system.
• After capillary tube separates, check tubing for
internal burrs. If burrs exist, repeat step 2.
3. Lift filter-drier from compressor area.
Figure 5-33. High-Side Filter-Drier Removal
NOTE: Always replace the filter-drier when opening the
sealed system for service.
5-15
#7012423 - Revision A - August, 2009
Component Access / Removal
Model UC-15I (Undercounter Ice Machine)
Compressor Removal
Electrical
Connections
The compressor sits on four grommets that are positioned 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.
Pry up with Screwdriver
Tab
To remove the compressor, first remove the kickplate,
door, lower hinge assembly, trim plate, slide cover
bracket, water filter panel, back panel and lower back
utility panel, then after capturing the refrigerant from the
sealed system (See Figure 5-34):
1. Remove electrical's cover and capacitor mounting
assembly by inserting a flat-bladed screwdriver
under capacitor and prying under tab while pulling
cover toward rear of unit and down, then push
cover down to release it from tabs on compressor.
2. Pull cover and capacitor away from compressor,
then disconnect wire leads from compressor electrical's.
3. Using a tube cutter, cut suction and discharge tubes
approximately 1” from compressor stubs.
NOTE: Do not sweat tubing apart. Doing so will
induce moisture into the sealed system.
4. Extract cotter pins from above compressor grommets, then lift compressor up off of unit tray and pull
toward rear of unit.
Cotter Pins (2 of 4)
Figure 5-34. Compressor Removal
Evaporator
NOTE: Always replace the filter-drier when opening the
sealed system for service.
Evaporator/Heat Exchanger Assembly Removal
Figure 5-35. Evaporator Removal (Top/Front View)
The evaporator is located at the top of the machine
under the top cover, atop the evaporator/spray bar
enclosure, with the heat exchanger running down the
back of the unit.
To remove the evaporator/heat exchanger assembly,
first remove the kickplate, top cover, fill tube clamp, fill
tube, back panel and lower back utility panel, then after
capturing the refrigerant from the sealed system (See
Figure 5-35):
1. Using a tube cutter, cut suction tube approximately
1” from compressor stub; cut hot gas tube approximately 1” from hot gas valve body; cut drier inlet
tube approximately 1” from drier.
NOTE: Do not sweat tubing apart. Doing so will
induce moisture into the sealed system.
2. Lift evaporator assembly from top of evaporator/
spray bar enclosure.
NOTE: Always replace the filter-drier when opening the
sealed system for service.
#7012423 - Revision A - August, 2009
5-16
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.
To remove the condenser, first remove the kickplate,
door, lower hinge assembly, trim plate, slide cover
bracket, water filter panel, back panel and lower back
utility panel, then after capturing the refrigerant from the
sealed system (See Figure 5-36):
Screws
Securing
Bracket to
Tray
1. Cut condenser inlet and outlet tubes approximately
1” from condenser stubs.
NOTE: Do not sweat tubing apart. Doing so will
induce moisture into the sealed system.
2. Remove fan motor mounting bracket.
3. Extract screws securing flange of the condenser
side brackets to the unit base tray.
4. Remove condenser from unit.
NOTE: Always replace the filter-drier when opening the
sealed system for service.
Figure 5-36. Condenser Removal (Front View)
5-17
#7012423 - Revision A - August, 2009
Component Access / Removal
Model UC-15I (Undercounter Ice Machine)
#7012423 - Revision A - August, 2009
5-18
Model UC-15I (Undercounter Ice Machine)
Troubleshooting
SECTION 6
TROUBLESHOOTING
GUIDE
6-1
#7012423 - Revision A - August, 2009
Troubleshooting
Model UC-15I (Undercounter Ice Machine)
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. To the left of the problem description is a letter.
Locate that letter in the left column of the Troubleshooting Guide. The center column will identify the possible causes for the problem. And, the information in the right column will explain what tests to perform in order to determine if
what you are checking is the cause and/or what action to take to correct the problem.
3
Troubleshooting Guide Layout
Page #
A. Ice Machine Does Not Operate .............................................................................................................................................
B. Ice Machine Operates, but Will Not Make Ice ....................................................................................................................
C. Ice Machine Makes Ice, but Cubes Do Not Release from Mold .......................................................................................
D. Slow/Low Ice Production ....................................................................................................................................................
E. Cubes are Shallow, Incomplete or White ...........................................................................................................................
F. Cubes are Too Big ...............................................................................................................................................................
G. Bin Front Panel Sweats .........................................................................................................................................................
6-3
6-3
6-5
6-5
6-6
6-6
6-6
NOTE: See WARNING below before beginning troubleshooting.
ELECTRICAL SHOCK HAZARD! WHEN UNIT IS PLUGGED INTO AN ELECTRICAL OUTLET, HIGH (LINE)
VOLTAGE IS APPLIED TO THE CONTROL BOARD (TERMINALS #20 AND #21) AT ALL TIMES. REMOVING
THE CONTROL BOARD FUSE OR SWITCHING THE UNIT TO OFF WILL NOT REMOVE THE POWER SUPPLIED TO THE CONTROL BOARD.
#7012423 - Revision A - August, 2009
6-2
Model UC-15I (Undercounter Ice Machine)
PROBLEM
A. Ice Machine Does Not
Operate
B. Ice Machine Operates, but
Will Not Make Ice
POSSIBLE CAUSE
Troubleshooting
TEST / ACTION
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).
No Electrical Power to Appliance
a. Verify fuse or circuit breaker is closed.
Replace fuse; switch circuit breaker on. If
circuit breaker trips or fuse blows again,
check for electrical short at outlet or appliance.
b. Verify ice machine is plugged into functioning, properly polarized and grounded 3prong receptacle. Plug unit in; repair electrical outlet or power cord.
c. See Wiring Diagrams and check for voltage
at appropriate points from outlet to control
board in control box. Reconnect, repair,
replace wiring or connectors.
Control Board Fuse Open
Visually inspect fuse, replace if open.
Transformer Fault
If interior light functions or red control board
light is energized, transformer is OK. If transformer is receiving power but no output,
replace transformer.
Control Board Fault
If transformer is supplying power to control
board and red control board light will not energize, replace control board.
Control Panel (User Interface) Board
Fault
If red control board light is energized, but
pressing “POWER” does not energize green
“POWER” light, then check wiring between
main control board and control panel board. If
wiring is defective, replace wire harness; if
wiring is good, replace control panel board.
Bin Thermostat Fault
With no ice on bin level sensing tube, thermostat should be closed; open with ice on tube
after ~ 3 minutes. Replace if defective.
Drain Pump Safety Switch is Open.
(UC-15IP, UC-15IPO Only)
Check drain hose for kinks or restrictions.
Repair or replace bad hose.
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).
Improper Water Pressure
Water pressure must be 20 - 80 psi (1.4 - 5.5
bar). Advise customer.
(Continued on next page)
6-3
#7012423 - Revision A - August, 2009
Troubleshooting
Model UC-15I (Undercounter Ice Machine)
PROBLEM
(Continued from last page)
B. Ice Machine Operates, but
Will Not Make Ice
POSSIBLE CAUSE
TEST / ACTION
No Water in Water Trough
a. Water supply is off. Turn water supply on.
b. Check water supply line for kinks or restrictions. Replace defective supply line.
c. Check water filter. Replace if clogged.
d. Check screens in water valve for obstructions. Clean screens or replace valve.
e. Check for loose or disconnected wiring to
water valve. Repair bad wiring.
f. Check water valve integrity / operation.
Replace if defective.
g. Check trough for leak. Reposition/replace
trough.
h. Check standpipe. Reposition or replace.
No Water Spray from Spray Nozzles
a. Check for blockage in spray nozzles. See
Maintenance, Cleaning and Adjustment
Information section of service manual.
b. Check trough for leak. Reposition/replace.
c. Check for loose or disconnected wiring to
spray pump. Repair or reconnect wiring.
d. Check operation of spray pump. Replace
if defective.
No Airflow Through Condenser
a. Check for obstructions in vents of kickplate. Move/clear obstruction.
b. Check condenser. Clean if dirty.
c. Check for loose or broken condenser fan
blade. Repair or replace blade.
d. Check condenser fan motor wire connections. Repair or reconnect wiring.
e. Check operation of condenser fan motor.
Replace if defective.
Hot Gas Valve Stuck Open
Check operation of hot gas valve. Replace
valve and drier if valve is defective.
Liquid Line Thermistor Fault
(Disconnected, Open or Misread)
a. Check connection at board. Reconnect.
b. Check for 30K - 33K ohms at ~32°F / 0°C
or 8K - 12K ohms at ~77°F / 25°C.
Replace if defective.
NOTE: A slow flashing light at control board
indicates thermistor open or disconnected. A
rapid flashing light indicates temperatures
exceeded 170°F (77°C); look for cause and/or
check thermistor resistance.
Compressor Electrical Fault
a. Check compressor electricals for loose or
disconnected wiring. Repair or reconnect.
b. Check operation of overload and relay. If
defective, replace.
Sealed System Fault
a. If power is at compressor and electricals
are good, but compressor will not run,
replace compressor and drier.
b. Inspect sealed system for leaks, restrictions or inefficient compressor by observing frost patterns and feel tubing for irregular temperatures. Repair or replace components as needed.
#7012423 - Revision A - August, 2009
6-4
Model UC-15I (Undercounter Ice Machine)
PROBLEM
C. Ice Machine Makes Ice, but
Cubes Do Not Release
from Mold
D. Slow/Low Ice Production
POSSIBLE CAUSE
Troubleshooting
TEST / ACTION
Mineral Scale Build-up in Ice Making
System
See Maintenance, Cleaning and Adjustment
Information section of service manual.
Freeze Time Too Long
See Cube Weight Check and Adjustment in
Maintenance, Cleaning and Adjustment
Information section of service manual.
Hot Gas Valve or Solenoid Fault
a. Check for loose or disconnected wiring to
hot gas valve solenoid. Repair bad wiring.
b. Check integrity of solenoid coil. Replace if
open or shorted.
c. Check operation of hot gas valve. If stuck,
replace valve and drier.
Liquid Line Thermistor Fault
(Disconnected, Open or Misread)
a. Check connection at board. Reconnect.
b. Check for 30K - 33K ohms at ~32°F / 0°C
or 8K - 12K ohms at ~77°F / 25°C.
Replace if defective.
NOTE: A slow flashing light at control board
indicates thermistor open or disconnected. A
rapid flashing light indicates temperatures
exceeded 170°F (77°C); look for cause and/or
check thermistor resistance.
Control Board Fault
Check for power at control board to hot gas
valve during harvest cycle. If no power is
present, replace board.
Heavy/Frequent Ice Consumption
12 - 24 hours to fill bin is normal. Heavy/frequent ice consumption will slow refill process.
Advise customer.
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).
Improper Water Temperatures
Water temperature minimum = 50°F (10°C),
maximum = 80°F (27°C). Ice production slows
with warmer water. Advise customer.
Poor or No Airflow Through Condenser
a. Check for obstructions in vents of kickplate. Move/clear obstruction.
b. Check condenser. Clean if dirty.
c. Check for loose or broken condenser fan
blade. Repair or replace blade.
d. Check condenser fan motor wire connections. Repair or reconnect wiring.
e. Check operation of condenser fan motor.
Replace if defective.
Bin Drain Restricted, Melting Ice in Bin
Clean out bin drain and/or check installation
for kinks in drain line.
(Continued on next page)
6-5
#7012423 - Revision A - August, 2009
Troubleshooting
Model UC-15I (Undercounter Ice Machine)
PROBLEM
(Continued from last page)
D. Slow/Low Ice Production
POSSIBLE CAUSE
TEST / ACTION
Water Filter Clogged
Check water filter. Replace if clogged.
Water Escaping from Water Trough
a. Check water trough for leaks. Reposition
trough or replace.
b. Check standpipe position. Reposition
standpipe.
Water Inlet Valve Fault
a. Check screens in water valve for obstructions. Clean screens or replace valve.
b. Check for loose wiring connections at
water valve. Repair connections.
c. Switch ice machine OFF. If water continues to enter machine, and water pressure
is good, replace valve.
Dirty Ice Making System
a. Unit needs cleaning. See Maintenance,
Cleaning and Adjustment Information section of service manual.
b. Have water quality tested; qualified company could make appropriate filter recommendations.
c Have water softener inspected, repaired (if
applicable).
Not Enough Water in Water Trough
a. Check water supply line for kinks or restrictions. Replace defective supply line.
b. Check water filter (partially clogged).
Replace filter.
c. Check screens in water valve for obstructions. Clean screens or replace valve.
d. Check for loose wiring to water valve.
Repair bad connections.
e. Check trough for leak. Reposition/replace
trough.
f. Check standpipe. Reposition or replace.
Freeze Time Too Short
See Cube Weight Check and Adjustment in
Maintenance, Cleaning and Adjustment
Information section of service manual.
F. Cubes are Too Big
Freeze Time Too Long
See Cube Size Control Adjustment instructions in Maintenance, Cleaning and
Adjustment section of manual.
G. Bin Front Panel Sweats
High Relative Humidity with Front Panel
Heater Fault
a. Check heater wire connections (in control
box); reconnect or repair.
b. Check resistance of heater; replace bin
front panel assembly if heater is open or
shorted.
E. Cubes are Shallow,
Incomplete or White
#7012423 - Revision A - August, 2009
6-6
Model UC-15I (Undercounter Ice Machine)
Technical Data
SECTION 7
TECHNICAL DATA
7-1
#7012423 - Revision A - August, 2009
Technical Data
Model UC-15I (Undercounter Ice Machine)
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)
Bin Thermostat Cut In / Cut Out
40°F(4.5°C) / 34°F(1.0°C)
Total Unit Amperage
4.1
Refrigerant Charge (134a)
#7012423 - Revision A - August, 2009
30K-33K / 8K-12K
5.6 oz. (1.5 kg)
7-2
Model UC-15I (Undercounter Ice Machine)
Wiring Diagram
SECTION 8
WIRING DIAGRAM
8-1
#7012423 - Revision A - August, 2009
Wiring Diagram
Model UC-15I (Undercounter Ice Machine)
WIRING DIAGRAM MODELS: UC-15I
#7012423 - Revision A - August, 2009
-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.
-Failure to observe the above warnings may result in severe electrical shock.
8-2
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