Sub-zero PRO48 User Manual
PRO 48 USE & CARE GUIDE
Caring for your Sub-Zero and everything in it.
Contents
Important Note
PRO 48 Refrigeration . . . . . . . . . . . . . . . . . . . . . . . . . . 3
PRO 48 Features . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
PRO 48 Models . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
PRO 48 Use & Care . . . . . . . . . . . . . . . . . . . . . . . . . . 12
Keeping Food at Its Best . . . . . . . . . . . . . . . . . . . . . . 15
Food Storage Recommendations . . . . . . . . . . . . . . . 19
Water Filtration System Performance Data . . . . . . . . 25
California Certification . . . . . . . . . . . . . . . . . . . . . . . . 26
Troubleshooting Guide . . . . . . . . . . . . . . . . . . . . . . . . 27
Service Information . . . . . . . . . . . . . . . . . . . . . . . . . . 30
Sub-Zero Warranty . . . . . . . . . . . . . . . . . . . . . . . . . . . 31
Features and specifications in this guide and on the website
are subject to change at any time without notice. Check our
website, subzero.com, for the most up-to-date specifications.
SUB-ZERO
®
is a registered trademark of Sub-Zero, Inc.
o ensure the safe and efficient use of Sub-Zero equip-
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ment, please take note of the following types of highlighted
information throughout this guide:
IMPORTANT NOTE highlights information that is
especially relevant to a problem-free installation.
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.
PRO 48 Refrigeration 3
subzero.com
Thank You
hank you for purchasing your new Sub-Zero PRO 48 unit.
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With Sub-Zero, you can rely on a 60-year tradition of
quality and reliability.
Built in to cabinetry or free-standing, the PRO 48 is just
the latest example of Sub-Zero pushing food preservation
to new heights. And of course, the PRO 48 still meets
rigorous Department of Energy standards for residential
use. Featuring a glass door on model 648PROG or
top-to-bottom stainless steel on model 648PRO. The
PRO 48 brings together the latest technology and finest
features in home refrigeration to give you the freshest food
possible.
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 on page 31 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
PRO 48 unit. If you have questions that are not addressed
here, call Sub-Zero Customer Service at 800-222-7820 or
visit our website, subzero.com.
Dual Refrigeration
he PRO 48 continues the Sub-Zero tradition of superior
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quality and reliability. Sub-Zero pioneered the development of our dual refrigeration system, giving you optimum
fresh and freezer food storage in ideal self-contained
sections. Both refrigerator and freezer maintain accurate,
consistent temperatures. Dual refrigeration keeps your
food fresh longer than any other system available.
With dual refrigeration, the freezer maintains a constant
temperature within one degree of the temperature you set
within our range of -5˚F (-21˚C) to +5˚F (-15˚C), without
unwanted moisture and odor from the refrigerator. Similarly, you can adjust the refrigerator temperature within a
range of 34˚F (1˚C) to 45˚F (7˚C), for proper humidity levels
tailored for longer food life expectancy.
The dual refrigeration system also means there is no
transfer of fresh food odors to frozen food or ice. The
Sub-Zero system does not freeze the moisture out of the
air in the fresh food section.
Sub-Zero dual refrigeration is also more energy efficient
than old-fashioned single refrigeration systems. When the
refrigerator is used frequently during the day it does not
require the freezer to circulate its very cold, dry air to the
refrigerator. Instead, the refrigerator uses moist air to keep
fresh foods fresh and energy use minimal.
PRO 48 Features 4
PRO 48 Features
Alarm with an audible beep lets you know when doors
Can be built in or, with the free-standing accessory kit,
•
used in a free-standing application.
•
or drawers are left ajar.
• Dual refrigeration—two compressors and three
evaporators keep foods fresher longer and prevent
odor transfer.
• Exterior temperature display with easy-to-read digital
readouts, accurate within one degree of your preset
temperatures.
• Microprocessor and interior control panel with up-front
touch controls monitor pattern-sensing defrost and
automatic service alerts.
• Holiday mode—power down one or both sides for
extended periods or just the weekend.
• Slide-out stainless steel bins—two versatile, removable
bins hold small items and fit neatly under any shelf.
• Crisper drawer is a touch-and-glide crisper with a
tight-seal glass lid that gives vegetables generous
humidity.
• Drawers with dividers help you enjoy full access to
food with adjustable, removable, and interchangeable
drawer dividers.
• Automatic ice maker lets you retrieve filtered ice from a
stainless steel bucket.
• Shelves are cantilevered and spill-proof, with stainless
steel trim (refrigerator); adjustable, removable and
100% stainless steel (freezer).
• Water filter is easy to replace and is just behind the
pop-up grille, for ice as pure as it is fresh.
• Easy-access grille pops up with a simple pull (no tools
needed) to reveal the water filter and condenser for
cleaning.
• Stainless steel construction and classic finish (inside
and out) for professional strength and beauty.
• Advanced lighting—top LED lights bathe upper
compartments in a soft glow; on the refrigerator side,
channeled sidewall LEDs can even serve as door area
night lights (night light option available on model
648PROG only).
• Triple-pane, UV-resistant glass—specially treated glass
offers convenient visibility while filtering harmful rays
and saving energy (model 648PROG only).
• For installations at or above 5,000' (1524 m) in eleva-
tion, high altitude glass is available as a special order.
• Certified by Star-K to meet religious regulations.
• UL approved for US and Canada.
• Sub-Zero products are covered by a two, five and
twelve year residential warranty (exclusions apply).
See warranty details at the end of this guide.
• Auto-close system with an advanced hinge design lets
doors finish closing easily and automatically.
These appliances are Star-K compliant to meet
strict religious regulations in conjunction with
specific instructions found on www.star-k.org.
PRO 48 Models 5
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Models 648PRO and 648PROG
REFRIGERATOR /FREEZER
Stainless steel
construction
Easy-access grille
Water filter
location
Holiday mode
Advanced lighting
Auto-close
hinge system
Adjustable stainless
steel shelves
Location of rating
plate (open drawer)
Automatic ice
maker
Dual refrigeration
system
Exterior temperature
display
Microprocessor and
interior control panel
Alarm
Triple-pane, UV-resistant glass (648PROG)
Adjustable spillproof glass shelves
Slide-out stainless
steel bins
Crisper drawer
Drawers with
dividers
Model 648PRO
Model 648PROG
with glass door
Model 648PROG with glass door shown.
PRO 48 Use & Care 6
Electronic Control System
he electronic control system of the PRO 48 monitors and
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accurately displays compartment temperatures within one
degree of your pre-set temperatures. It also monitors the
operation of the unit and lets you know if there is a
problem. The interior control panel located at the top of
the refrigerator door compartment has key pads to set
temperatures and control functions of the electronic
control system. Refer to the illustration below.
TEMPERATURE CONTROL
Your new PRO 48 was thoroughly inspected and tested
before it was shipped from the Sub-Zero factory. Temperatures are preset at 38°F (3°C) in refrigerator compartments
and 0°F (-18°C) in the freezer compartments.
There are three sets of WARMER and COLDER key pads
on the interior control panel, two for the refrigerator
compartments (upper door and lower drawers) and one for
the freezer compartments. To adjust the temperature in
any of the three compartments, depress the WARMER or
COLDER key pad for that compartment. Digital temperatures for each of the three compartments are displayed in
the exterior temperature display.
EXTERIOR TEMPERATURE DISPLAYS
Electronic control system functions, such as digital
temperatures and service indicators, are displayed in two
exterior temperature displays located on the grille. The
display in the lower left area of the grille shows the
temperature and indicators for freezer compartments, and
the display in the lower right gives readouts for refrigerator
compartments. Refer to the illustrations below.
Exterior temperature displays.
Temperature ranges are -5°F (-20°C) to +5°F° (-15°C°) in
the freezer sections and 34°F (1°C) to 45°F (7°C) in the
refrigerator sections. It is normal for temperatures to fluctuate slightly, depending on external influences such as an
open door, the degree of humidity and room temperature.
IMPORTANT NOTE: Always allow 24 hours for compart-
ments to reach the temperature you set.
Freezer Temperature
Controls
Interior control panel.
Ice Maker
On/Off
Power
On/Off
Alarm
On/Off
Lights
On/Off
Refrigerator
Temperature Controls
Upper
Compartment
Drawer
Compartments
PRO 48 Use & Care 7
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Electronic Control System
POWER ON/OFF
The POWER key pad on the control panel will shut off all
electrical power to the unit. When the power is off, the
OFF indicator light will be visible in the exterior temperature display. Using the POWER key pad means you do not
have to shut off power at the circuit breaker or unplug the
unit. The POWER key pad can be used for extended
vacations.
It is possible to shut off power to one compartment of the
PRO 48 for an extended period without affecting operation
of the other compartments.
First, turn the unit off by depressing the POWER key pad.
Then push and hold the WARMER key pad of the
compartment you wish to shut down. Depress the POWER
key pad to turn the unit back on. The disabled zone will be
indicated with “--” in the exterior temperature display.
Repeat the process to resume power to the compartment.
Be sure to shut off power to the unit at the circuit
breaker during service.
ALARM FEATURE
The PRO 48 has an alarm feature that lets you know with
an audible beep if a door or drawer is left ajar. The alarm
will sound after 30 seconds if a door or drawer is left open
and will stop once the door or drawer is closed. This alarm
can be disabled for cleaning or restocking by depressing
the ALARM key pad on the control panel.
ICE MAKER ON/OFF
The ICE MAKER key pad on the control panel switches
power to the ice maker system on or off. Use the ICE
MAKER key pad to shut down ice maker operation during
extended vacations. The ice bucket icon will be visible in
the exterior temperature display if the ice maker system
is on.
VISUAL SERVICE DISPLAY
The electronic control system monitors compartment and
component temperatures as well as the ice maker system.
If there is a temperature or ice maker problem, you will be
alerted by a flashing SERVICE indicator light in the exterior
temperature display. This same SERVICE light will also
flash if the condenser needs cleaning.
SABBATH MODE (STAR-K)
The PRO 48 features Sabbath mode for certain religious
observances where lights and the ice maker need to be
turned off.
To initiate Sabbath mode while the unit is on, press the
POWER key pad on the control panel so that OFF is
visible in the exterior temperature display. Then press and
hold the POWER key pad for 10 seconds. This will turn the
unit back on with lights and ice maker disabled. There will
be four short beeps, indicating that the Sabbath mode has
been set. To return the unit to normal operation, press and
release the POWER key pad.
If you have questions about Star-K compliance, visit
www.star-k.org.
PRO 48 Use & Care 8
Refrigerator Storage
ADJUSTABLE GLASS SHELVES
The adjustable glass shelves of the PRO 48 upper refrigerator compartment are cantilevered and spill proof with
stainless steel trim.
To remove a shelf, tilt the shelf up at the front, then lift it
up and out of the tracks on the rear wall of the refrigerator.
To replace a shelf, insert in the tracks with the front of the
shelf raised slightly. As you push the shelf in, lower the
front of the shelf until it locks into position. Refer to the
illustration of the adjustable glass shelves below.
IMPORTANT NOTE: Always be careful handling glass
shelves to prevent breaking the glass or scratching the
interior.
ADJUSTABLE SLIDE-OUT BINS
The PRO 48 features two versatile, adjustable stainless
steel slide-out bins that fit neatly under any refrigerator
compartment shelf. The glass shelves have integrated rails
that make it possible to position the slide-out bins in a
variety of locations.
To remove the slide-out bin, simply pull the handle portion
of the bin forward until it stops, lift it up and out of the rails
mounted below the glass shelf. Refer to the illustration of
the adjustable slide-out bin below.
Storage drawer with crisper lid.
CRISPER LID ASSEMBLY
The PRO 48 upper refrigerator drawer features a crisper lid
to provide higher humidity in the drawer compartment.
This assembly allows for easy access to the compartment
and has a clear-view window for visibility of stored
vegetables.
To remove the crisper lid assembly, pull the upper refrigerator drawer all the way out, raise the front edge of the
crisper lid assembly up and pull out from the back. Refer
to the illustration of the crisper lid above.
REFRIGERATOR DRAWER DIVIDERS
Adjustable glass shelves. Adjustable slide-out bin.
The PRO 48 refrigerator storage drawers give you full
access to food with adjustable and removable dividers.
The dividers are interchangeable between the upper and
lower refrigerator drawer. Two long dividers run the full
depth of the drawer, with shorter dividers that connect to
the long dividers to compartmentalize the drawer.
To remove the short dividers, lift up and out of position
from supports on the long dividers and sides of the
drawer. The long dividers can also be removed by lifting
up and out of position from drawer support tabs. Refer to
the illustration of the storage drawer above.
PRO 48 Use & Care 9
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Freezer Storage
ADJUSTABLE SHELVES
The adjustable shelves of the PRO 48 upper freezer
compartment are cantilevered and 100% stainless steel.
The freezer shelves are repositioned the same way as the
glass shelves in the refrigerator compartment. To remove
or adjust the freezer shelves, first tilt the shelf up at the
front, then lift it up and out of the tracks on the rear wall of
the freezer.
To replace a shelf, insert in the tracks on the rear wall of
the freezer with the front of the shelf raised slightly. As you
push the shelf in, lower the front of the shelf until it locks
into position.
ICE BUCKET REMOVAL
The automatic ice maker and stainless steel ice bucket are
located in the lower freezer drawer.
To remove the ice bucket, pull the freezer drawer out until
it stops, lift the ice bucket up and out of the drawer. The
entire lower freezer drawer can now be used for more ice
storage if necessary.
Storage Drawer Removal
he refrigerator and freezer storage drawers are remov-
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able for cleaning. The drawers have an automatic stop
built in to prevent drawers from coming all the way out of
the unit.
To remove, pull the drawer all the way out until it stops, lift
up evenly on both sides of the drawer front and pull out.
To reinstall, raise the front of the drawer and place onto
the drawer slide tracks. Be sure to engage the front of
the drawer slide with the drawer assembly. Refer to the
illustration of the storage drawer removal below.
IMPORTANT NOTE: To reduce the weight of the drawer, be
sure to unload the contents before removing the drawer.
Storage drawers are heavy. Be sure to keep your feet
clear as you remove the drawer.
Storage drawer removal.
PRO 48 Use & Care 10
Water Filtration System
he PRO 48 features a water filtration system that
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supplies filtered water to the ice maker to produce greattasting ice. The water filter has been factory installed
behind the grille assembly.
It is important that the operation, maintenance and filter
replacement requirements be carried out as scheduled.
Refer to the following information on the water filter
cartridge monitor.
WATER FILTER CARTRIDGE MONITOR
The water filter cartridge is designed to last for up to one
year of continuous use of the ice maker. The electronic
control system monitors the life of the water filter cartridge
and indicates when it needs to be replaced. An indicator
that reads “REPLACE FILTER” will be visible in the left
side exterior temperature display. Follow steps to replace
the water filter cartridge on the following page.
IMPORTANT NOTE: If the unit has been turned off or the
ice maker disabled for one month or longer, the water filter
cartridge should be replaced once the unit and ice maker
are back in operation.
IMPORTANT NOTE: Do not use with water that is microbi-
ologically unsafe or of unknown water quality without
adequate disinfection before or after the system. Systems
certified for cyst reduction may be used on disinfected
waters that may contain filterable cysts.
Refer to the performance data on page 25 for additional
information regarding the water filtration system.
Once the filter cartridge has been replaced, the control
automatically resets the water filter life monitor and the
“REPLACE FILTER” indicator will no longer be displayed.
Although it is designed to last for up to one year of use,
the actual life of the filter cartridge may vary with water
supply conditions. Therefore, it is recommended that the
filter cartridge be replaced when the “REPLACE FILTER”
indicator is displayed or if the ice cubes become hollow or
smaller.
IMPORTANT NOTE: The warranty for the water filter
cartridge supplied with the unit only covers defects in
materials or workmanship and not replacement due to
normal use.
Replacement Sub-Zero water filter cartridges (4204490)
can be ordered by calling 800-222-7820 or online at
subzerowolfstore.com.
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