Sub-Zero UC-15I User manual

USE & CARE GUIDE
Undercounter Ice Machine

Important Note
To ensure the safe and efficient use of Sub-Zero equip-
ment, please take note of the following types of highlighted
information throughout this guide:
IMPORTANT NOTE highlights information that is especially
important.
CAUTION signals a situation where minor injury or product
damage may occur if instructions are not followed.
WARNING states a hazard that may cause serious injury or
death if precautions are not followed.
Contents
Undercounter Ice Machine ........................ 3
Ice Machine Models ............................. 4
Ice Machine Operation ........................... 5
Ice Machine Care ............................... 9
Troubleshooting Guide .......................... 12
Service Information ............................. 13
Sub-Zero Warranties ............................ 14
Features and specifications are subject to change at any time
without notice. Visit our website, subzero.com for the most
up-to-date information.

Sub-Zero Undercounter Ice Machine 3
subzero.com
Thank You
Thank you for purchasing your new Sub-Zero under-
counter ice machine. With Sub-Zero, you can rely on a
60-year tradition of quality and reliability.
Your Sub-Zero is protected by a warranty that is one of
the finest in the industry. Take a moment to read the
warranty statement at the end of this guide and refer to it
should service become necessary.
This use & care guide will answer most of your questions
about the features, operation and maintenance of your
undercounter ice machine. If you have questions that are
not addressed here, call Sub-Zero customer care at
800-222-7820 or visit our website, subzero.com.
If service should become necessary, you will need the
model and serial numbers of the ice machine. Both
numbers are listed on the product rating plate, located in
the upper left corner of the ice bin and on the back of the
unit. Refer to the illustration below.
BEFORE OPERATING
It is important to clean and sanitize the ice machine prior
to use for optimum ice quality. To ensure proper operation,
follow the operational checks on pages 7–8.
IMPORTANT NOTE: Adjustments and cleaning and main-
tenance procedures outlined in this guide are not covered
by the warranty.
Do not operate equipment that has been misused,
neglected, damaged, altered or modified from that of
original manufactured specifications.
Do not store food or beverages in the ice machine.
Location of rating plate.
RATING PLATE

Ice Machine Models 4
Ice Machine Features
•High-volume ice machine—great for entertaining.
•Models UC-15IPO and UC-15IO UL approved for
outdoor use up to 110°F (45°C).
•Produces up to 50 lbs (23 kg) of ice per day with
large-capacity storage.
•Automatic ice maker provides quality, octagonal-
shaped ice.
•Advanced water filtration system.
•Produces ice in air temperature up to 100°F (40°C)—
up to 110°F (45°C) for outdoor models.
•Easy-access control panel.
•Two, four or eight hour delay feature.
•Clean and change filter indicator lights.
•Bin light.
Models UC-15I(P) and UC-15I(P)O
ICE MACHINE
Ice scoop
Water shutters
Large capacity
ice storage bin
Water reservoir
Control panel
Kickplate
Water filter
Gasket
•Ice scoop fits neatly in door.
•Automatic defrost.
•Drain pump for models UC-15IP and UC-15IPO—
models UC-15I and UC-15IO use a gravity drain.
•UL approved for US and Canada.
•Two, five and twelve year residential warranty—
exclusions apply, see warranty at the end of this guide.
Reversible
door hinge
Bin light

Ice Machine Operation 5
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Control Panel
POWER KEY PAD
Press the POWER key pad once to activate the ice
machine and the green POWER light. Press the POWER
key pad a second time to deactivate the ice machine.
ICE LIGHT
The blue ICE light is illuminated when the ice machine is in
ice making operation. The light is off when the ice machine
is in the clean cycle.
DELAY KEY PAD
Press the DELAY key pad to initiate a delay period. The ice
machine will not produce ice until the delay period has
expired.
•Press the key pad once to illuminate the 2-hour light
and initiate a two hour delay period.
•Press the key pad a second time to illuminate the
4-hour light and initiate a four hour delay period.
•Press the key pad a third time to illuminate the 8-hour
light and initiate an eight hour delay period.
•Press the key pad a fourth time will cancel the delay
period.
CLEAN KEY PAD
Press the CLEAN key pad to initiate a cleaning cycle. The
ICE light will be deactivated. The green CLEAN light will
flash during the cleaning cycle to indicate the proper time
to add cleaner or sanitizer to the ice machine.
REPLACE FILTER LIGHT
When the ice machine completes 8000 freeze and harvest
cycles, the red REPLACE FILTER light will illuminate to
indicate the filter needs replaceing. Depress the CLEAN
key pad for six seconds to reset the counter and light.
Control panel.

Ice Machine Operation 6
Ice Making Operation
Depending on ambient conditions and cold water supply
temperature, the ice making process will take approxi-
mately 30 minutes.
1) Water fill cycle. (Initial start-up or start-up after
automatic shut-off.) Before the compressor starts, the
water inlet valve will purge old water from the system
for about three minutes.
2) Refrigeration system start-up. The compressor starts
after the water fill cycle and remains on throughout the
freeze and harvest cycles. The condenser fan motor
starts and runs throughout the freeze cycle.
3) Freeze cycle. The water pump sprays water into the
inverted cups. The water freezes layer by layer, until an
ice cube forms in each cup. The control system will
adjust the length of the freeze cycle to conditions.
4) Harvest cycle. The water pump shuts off and the
water inlet valve starts up to assist harvest and refill
the water sump. The evaporator is warmed, allowing
the cubes to release from the evaporator and drop into
the storage bin. The control system will adjust the
length of the harvest cycle to conditions and regulate
whether the condenser fan will run. At the end of the
harvest cycle, the ice machine will start another freeze
cycle.
5) Automatic shut-off. The level of ice in the storage bin
controls the automatic shut-off. When the bin is full, ice
will contact the bin thermostat clip. The bin thermostat
clip cools, signaling the ice machine to stop ice
production. When the ice level drops and ice no longer
contacts the bin thermostat clip, it will warm. The
increase in temperature will restart ice production.

If ice production stops before the bin is full or continues
after the bin is full, ambient temperatures are probably too
high or too low. The level of ice can be adjusted by follow-
ing the steps below. The bin thermostat control is located
behind the kickplate. Refer to the illustration below.
1) To access the bin thermostat, remove the four screws
attaching the kickplate and tilt forward to remove.
2) Turn the bin thermostat control to the left to decrease
the level of ice or to the right to increase the level of ice
in the bin before automatic shut-off.
3) Reinstall the kickplate.
Ice Machine Operation 7
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Operational Checks
The ice machine is factory tested and adjusted before
shipping. Normally, new installations do not require any
adjustment. Routine adjustments and maintenance proce-
dures are not covered by the warranty.
To ensure proper operation, follow the operational checks
when starting the ice machine for the first time, after a
prolonged out of service period and after cleaning and
sanitizing.
WATER LEVEL
The ice machine maintains the correct water level. The
water level is not adjustable.
BIN THERMOSTAT
The bin thermostat signals the ice machine to stop ice
production when the bin is full. It is preset for normal
ambient temperatures and adjustments are usually not
necessary.
To check operation of the bin thermostat, place three ice
cubes on the thermostat clip for about five minutes, ice
production should stop. The ice machine should restart
five minutes after the cubes are removed. Refer to the
illustration below.
Power is supplied to ice machine during this procedure.
Avoid contact with the fan blade and the electrical
connections.
THERMOSTAT
CLIP
Bin thermostat clip. Bin thermostat adjustment.
THERMOSTAT
CONTROL

Ice Machine Operation 8
Operational Checks
CUBE WEIGHT
Cube weight increases or decreases depending on the
amount of dimple in the cube. Refer to the illustration
below. The cube weight can be increased from the factory
setting by adjusting the finish time.
Check cube finishing time. Press and hold the POWER
key pad for five seconds. Count the flashes on the ICE
light. The light will flash once for each additional minute of
freeze cycle time.
Adjust cube finishing time. Adjust in one minute incre-
ments and allow the ice machine to run several freeze and
harvest cycles, then inspect the ice cubes. If a heavier
cube weight is desired add another minute of freeze time
and repeat the process.
1) Press and hold the POWER key pad.
2) Press and release the CLEAN key pad once for each
additional minute of freeze cycle time desired. Five
minutes is the maximum additional freeze time that can
be added.
3) Press the CLEAN key pad six times to reset the
finishing time to the original factory setting.
DIMPLE
Cube weight.
Cleaning
Proper cleaning and maintenance of your ice machine will
increase its reliability and performance and help minimize
water and power consumption.
IMPORTANT NOTE: Poor water quality may require more
frequent cleaning, sanitizing and water filter replacement.
Clean the entire unit including the cabinet exterior periodi-
cally. Also check the ice quality. To ensure reliable,
trouble-free operation and maximum ice production, the
following cleaning and maintenance should be performed
every six months or after a prolonged shutdown.
•Sanitize ice storage bin (also before initial start-up).
•Clean condenser.
•Replace water filter.
To ensure efficient operation, an annual cleaning
performed by Sub-Zero factory certified service is recom-
mended. The ice machine will require disassembly,
cleaning and sanitizing. For the name and number of
Sub-Zero factory certified service, check the contact &
support section of our website, subzero.com or call
800-222-7820.

Cleaning
CLEANING AND SANITIZING
Cleaning and sanitizing of all surfaces that come in
contact with the water system should be performed every
six months. The following steps outline the cleaning and
sanitizing procedure with the ice machine in place.
Use only the cleaner and sanitizer made for your Sub-Zero
ice machine. The cleaner removes lime scale or other
mineral deposits and the sanitizer disinfects and removes
algae and slime.
If the ice machine requires more frequent cleaning and
sanitizing, consult a qualified professional to test the water
quality and recommend appropriate water treatment.
An abnormally dirty ice machine must be disassembled
for proper cleaning and sanitizing by Sub-Zero factory
certified service.
Ice Machine Care 9
subzero.com
1) Add 4 ounces (115 ml) of undiluted ice machine cleaner
to a container that will fit under the lifted water
shutters. Refer to the illustration below.
2) Press the CLEAN key pad. The ice machine will initiate
a two minute harvest to remove any remaining ice from
the evaporator.
3) Remove all ice from the bin.
4) Wait three minutes until the CLEAN light flashes, then
add the prepared cleaner by lifting the water shutters
and pouring directly into the spray area.
5) The ice machine will automatically time out a ten
minute cleaning cycle, followed by eight rinse cycles,
and stop. The CLEAN light will turn off to indicate the
cleaning cycle is complete. This entire cycle lasts
approximately 30 minutes.
6) Add 1 tablespoon (15 ml) of undiluted ice machine sani-
tizer to a container that will fit under the lifted water
shutters.
7) Press the CLEAN key pad. Wait three minutes until the
CLEAN light flashes, then add the prepared sanitizer by
lifting the water shutters and pouring directly into the
spray area. The ice machine will automatically time out
a ten minute sanitizing cycle, followed by eight rinse
cycles, and stop. The CLEAN light will turn off to
indicate the sanitizing cycle is complete. This entire
cycle lasts approximately 30 minutes.
8) The ice machine will automatically continue from the
previous point before the cleaning cycle was initiated.
If the ice machine was in the ice making cycle, the
control board will start ice making again. If it was in the
off cycle, the control board will turn off.
Use only the Sub-Zero approved ice machine cleaner
and sanitizer and follow all label directions and
warnings. Damage to the ice machine evaporator
caused by incorrect chemical usage is not covered by
the warranty.
Location of water shutters.
WATER
SHUTTERS

Ice Machine Care 10
Do not use a metallic or highly abrasive cleaner or
cloth, as this will scratch the stainless steel finish.
Cleaning
STAINLESS STEEL
To clean stainless steel surfaces of the ice machine, use
a soft, nonabrasive stainless steel cleaner like Signature
polish and apply with a soft lint-free cloth.
Signature polish is available from Signature Limited
Laboratory, P. O. Box 13436, Dayton, Ohio 45413, or call
877-376-5474.
To bring out the natural luster of the stainless steel, lightly
wipe the surface with a water-dampened microfiber cloth
followed by a dry polishing chamois. All work should
follow the grain direction of the finish. Better results are
obtained by keeping the cloth in continuous contact with
the stainless steel.
CONDENSER CLEANING
A dirty condenser restricts airflow, resulting in excessively
high operating temperatures. This reduces ice production
and shortens component life. The condenser should be
cleaned every three to six months or after a prolonged
shutdown.
The condenser of the ice machine is located at the bottom
of the unit, behind the kickplate. Refer to the illustration
below. To clean, follow these steps:
1) Remove the four screws attaching the kickplate and tilt
forward. Clean kickplate openings before replacing.
2) Clean the outside of the condenser with a soft brush or
a vacuum with a brush attachment. Clean from top to
bottom, not side to side. Be careful not to bend the
condenser fins.
3) Using a flashlight, check for dirt between the fins. If dirt
remains between the fins or if the condenser fins are
bent or flattened, contact Sub-Zero factory certified
service.
Before cleaning the condenser, shut off power to the
unit at the control panel. Wear gloves to avoid injury
from sharp condenser fins.
Vacuum condenser.
CONDENSER

Ice Machine Care 11
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Maintenance
WATER FILTER REPLACEMENT
The water filter should be replaced every six months or
after a prolonged shutdown. To replace the water filter,
incoming water does not need to be turned off. The ice
machine is equipped with an auto bypass feature which
bypasses the filter when it is removed.
IMPORTANT NOTE: Poor water quality may require more
frequent water filter replacement.
To remove, turn the water filter one-quater turn counter-
clockwise and it will pop out. Refer to the illustration
below. Reverse the process to install the new water filter.
Replacement water filters can be ordered by calling
800-222-7820 or online at subzerowolfstore.com.
PROLONGED SHUTDOWN AND WINTERIZATION
Special precautions must be taken if the ice machine is to
be removed from service for an extended period of time or
exposed to ambient temperatures of 32°F (0°C) or below.
Follow these steps:
1) Perform a cleaning and sanitizing procedure to prevent
mildew growth.
2) Disconnect the electrical power at the circuit breaker or
service panel.
3) Turn off the water supply.
4) Remove the water from the water reservoir.
5) Disconnect the incoming water supply line at the rear
of the ice machine and allow it to drain.
6) Disconnect the vinyl hose from the water pump and
allow it to drain.
7) Make sure water is not trapped in any of the water
supply or drain lines. Compressed air can be used to
blow out the lines.
8) Use a spray bottle with a solution of 1 tablespoon
(15 ml) sanitizer to 1 gallon (3.8 L) water and spray all
interior surfaces. Do not rinse, allow it to air dry.
9) Block the door partially open to provide air exchange
and prevent mildew growth.
If water is allowed to remain in the ice machine in
freezing temperatures, damage to some components
could result. Damage of this nature is not covered by
the warranty.
Water filter replacement.
WATER
FILTER

Troubleshooting Guide 12
Troubleshooting
If your ice machine is not operating properly, use the
following troubleshooting guide before contacting
Sub-Zero factory certified service. This guide will save
you time and trouble and may help you avoid the expense
of a service call.
Ice machine does not operate.
•Press the POWER key pad to turn on the ice machine.
Verify that it is plugged into a 115 V AC outlet.
•Check the household fuse or circuit breaker to see if it
has been blown or tripped. A power outage may also
have caused a disruption in service.
•Bin thermostat may need adjustment, refer to page 7.
•Drain pump safety switch is open. Verify that the line is
not kinked or crimped before calling for service.
Ice machine operates, but no ice is produced.
•No water is being supplied to ice machine. Connect
water supply.
•Incorrect incoming water pressure. Water pressure
must be 20 psi (1.4 bar) to 100 psi (6.9 bar). If a reverse
osmosis system is used to supply water, it may not
provide adequate, constant water pressure.
•Spray nozzles blocked with mineral buildup. Clean and
sanitize the ice machine, refer to page 9.
•Ambient air temperature is too high or too low. Ambient
air temperature must be between 50°F (10°C) and 100°F
(40°C) for indoor models and between 50°F (10°C) and
110°F (45°C) for outdoor models.
•Water filter is clogged. Replace water filter, clean and
sanitize ice machine and clean condenser. Refer to
pages 8–11.
Freeze cycle is long, low ice production.
•Water temperature is too high. Connect a cold water
supply, verify that check valves in faucets and other
equipment are functioning correctly.
•Dirty condenser. Clean condenser, refer to page 10.
•Vents in kickplate are obstructed. Remove obstruction.
•Ambient air temperature is too high. Ambient air
temperature must be between 50°F (10°C) and 100°F
(40°C) for indoor models and between 50°F (10°C) and
110°F (45°C) for outdoor models.
•Water filtration is poor. Replace water filter, refer to
page 11.
•Water inlet valve is not working properly. Turn off ice
machine. If water continues to enter ice machine, the
water inlet valve must be replaced, contact Sub-Zero
factory certified service.
•Refrigeration problem. Contact Sub-Zero factory
certified service.
Poor ice quality, cubes are shallow, incomplete or white.
•Ice machine is dirty. Follow the cleaning and sanitizing
procedure on page 9.
•Water filtration is poor. Replace water filter, refer to
page 11.
•Water softener is not working properly (if applicable).
Repair the water softener.
•Poor incoming water quality. Consult a qualified
professional to test the water quality and recommend
appropriate water treatment.

Service Information 13
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Service Information
If you do need service, be sure to have the model and
serial number of your unit when you call. The numbers are
listed on the product rating plate. Refer to the illustration
on page 3 for location of the rating plate.
For warranty purposes, you will also need the date of
installation and the name of your authorized Sub-Zero
dealer. Record this information below for future reference.
BEFORE CALLING FOR SERVICE
Before calling Sub-Zero factory certified service, refer to
the troubleshooting guide on the previous page.
PRODUCT REGISTRATION
Register your new Sub-Zero today so that we may ensure
your satisfaction. You may register by one of the following
options:
1) Mail in the completed Sub-Zero product registration
card.
2) Register online at subzero.com.
3) Register by phone by calling Sub-Zero customer care
at 800-222-7820.
The model and serial number of your unit are printed on
the enclosed Sub-Zero product registration card. If you
provide us with your e-mail address, we will send you
exciting new product updates and recipes as they become
available, along with information on special events.
Model Number
Serial Number
Installation Date
Sub-Zero Factory Certified Service
Phone
Authorized Sub-Zero Dealer
Phone
The information and images in this guide are the copyright property of Sub-Zero, Inc. Neither this guide nor any information or images contained herein may be
copied or used in whole or in part without the express written permission of Sub-Zero, Inc. ©Sub-Zero, Inc. all rights reserved.
Wolf, Wolf & Design, Wolf Gourmet, W & Design and the color red as applied to knobs are registered trademarks and service marks of Wolf Appliance, Inc.
Sub-Zero, Sub-Zero & Design, Dual Refrigeration, Constant Care and The Living Kitchen are registered trademarks and service marks of Sub-Zero, Inc.
(collectively, the “Company Marks.”) All other trademarks or registered trademarks are property of their respective owners in the United States and other countries.

Sub-Zero Products Limited Warranty
FOR RESIDENTIAL USE ONLY
FULL TWO YEAR WARRANTY*
For two years from the date of original installation, your Sub-Zero product warranty covers all parts and labor
to repair or replace, under normal residential use, any part of the product that proves to be defective in
materials or workmanship. All service provided by Sub-Zero under the above warranty must be performed by
Sub-Zero factory certified service, unless otherwise specified by Sub-Zero, Inc. Service will be provided during
normal business hours.
FULL FIVE YEAR SEALED SYSTEM WARRANTY
For five years from the date of original installation, your Sub-Zero product warranty covers all parts and labor
to repair or replace, under normal residential use, the compressor, condenser, evaporator, drier and all con-
necting tubing that prove to be defective in materials or workmanship. All service provided by Sub-Zero under
the above warranty must be performed by Sub-Zero factory certified service, unless otherwise specified by
Sub-Zero, Inc. Service will be provided during normal business hours.
LIMITED TWELVE YEAR SEALED SYSTEM WARRANTY
For twelve years from the date of original installation, your Sub-Zero product warranty covers all parts to repair
or replace, under normal residential use, the compressor, condenser, evaporator, drier and all connecting tubing
that prove to be defective in materials or workmanship.
TERMS APPLICABLE TO EACH WARRANTY
The warranty applies only to products installed for normal residential use. The warranty applies only to products
installed in any one of the fifty states of the United States, the District of Columbia or the ten provinces of
Canada. This warranty does not cover any parts or labor to correct any defect caused by negligence, accident
or improper use, maintenance, installation, service or repair.
THE REMEDIES DESCRIBED ABOVE FOR EACH WARRANTY ARE THE ONLY ONES THAT SUB-ZERO, INC.
WILL PROVIDE, EITHER UNDER THIS WARRANTY OR UNDER ANY WARRANTY ARISING BY OPERATION OF
LAW. SUB-ZERO, INC. WILL NOT BE RESPONSIBLE FOR ANY CONSEQUENTIAL OR INCIDENTAL DAMAGES
ARISING FROM THE BREACH OF THIS WARRANTY OR ANY OTHER WARRANTY, WHETHER EXPRESS,
IMPLIED OR STATUTORY.
Some states do not allow the exclusion or limitation of incidental or consequential damages, so the above
limitation or exclusion may not apply to you. This warranty gives you specific legal rights and you may also have
other legal rights that vary from state to state.
To receive parts and/or service and the name of Sub-Zero factory certified service nearest you, contact
Sub-Zero, Inc., P.O. Box 44848, Madison, WI 53744; check the contact & support section of our website,
subzero.com or call 800-222-7820.
*Stainless steel doors, panels, handles, product frames and interior surfaces are covered by a limited 60-day
parts and labor warranty for cosmetic defects.
*Replacement water filters and air purification cartridges are not covered by the product warranty.

Sub-Zero Outdoor Products Limited Warranty
PRODUCT MUST BE APPROVED FOR OUTDOOR USE, DESIGNATED BY MODEL AND SERIAL NUMBER
FOR RESIDENTIAL USE ONLY
FULL ONE YEAR WARRANTY*
For one year from the date of original installation, your Sub-Zero product warranty covers all parts and labor
to repair or replace, under normal residential use, any part of the product that proves to be defective in
materials or workmanship. All service provided by Sub-Zero under the above warranty must be performed by
Sub-Zero factory certified service, unless otherwise specified by Sub-Zero, Inc. Service will be provided during
normal business hours.
FULL FIVE YEAR SEALED SYSTEM WARRANTY
For five years from the date of original installation, your Sub-Zero product warranty covers all parts and labor
to repair or replace, under normal residential use, the compressor, condenser, evaporator, drier and all con-
necting tubing that prove to be defective in materials or workmanship. All service provided by Sub-Zero under
the above warranty must be performed by Sub-Zero factory certified service, unless otherwise specified by
Sub-Zero, Inc. Service will be provided during normal business hours.
TERMS APPLICABLE TO EACH WARRANTY
The warranty applies only to products installed for normal residential use. The warranty applies only to products
installed in any one of the fifty states of the United States, the District of Columbia or the ten provinces of
Canada. This warranty does not cover any parts or labor to correct any defect caused by negligence, accident
or improper use, maintenance, installation, service or repair.
THE REMEDIES DESCRIBED ABOVE FOR EACH WARRANTY ARE THE ONLY ONES THAT SUB-ZERO, INC.
WILL PROVIDE, EITHER UNDER THIS WARRANTY OR UNDER ANY WARRANTY ARISING BY OPERATION OF
LAW. SUB-ZERO, INC. WILL NOT BE RESPONSIBLE FOR ANY CONSEQUENTIAL OR INCIDENTAL DAMAGES
ARISING FROM THE BREACH OF THIS WARRANTY OR ANY OTHER WARRANTY, WHETHER EXPRESS,
IMPLIED OR STATUTORY.
Some states do not allow the exclusion or limitation of incidental or consequential damages, so the above
limitation or exclusion may not apply to you. This warranty gives you specific legal rights and you may also have
other legal rights that vary from state to state.
To receive parts and/or service and the name of Sub-Zero factory certified service nearest you, contact
Sub-Zero, Inc., P.O. Box 44848, Madison, WI 53744; check the contact & support section of our website,
subzero.com or call 800-222-7820.
*Stainless steel doors, panels, handles, product frames and interior surfaces are covered by a limited 60-day
parts and labor warranty for cosmetic defects.
*Replacement water filters are not covered by the product warranty.

SUB-ZERO, INC. P. O. BOX 44848 MADISON, WI 53744 SUBZERO.COM 800.222.7820
7023607 REV-A 8/2011