Sub-Zero 700-3 BASE Technical & Service Manual
SUB-ZERO FREEZER COMPANY INC. 2005 ALL RIGHTS RESERVED JOB AID #3758424 (Revision B - December, 2005)
Integrated
(700-
3
BASE)
Series
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SSeerrvviiccee MMaannuuaall
General Information
Integrated
(700-3BASE)
Series
1-1
#3758424 - Revision B - December, 2005
SECTION 1
GENERAL
INFORMATION
General Information
Integrated
(700-3BASE)
Series
1-2
#3758424 - Revision B - December, 2005
TECHNICAL ASSISTANCE
If you should have any questions regarding a 7003 Base Unit and/or this manual, please contact:
Sub-Zero Freezer Company, Inc.
ATTN: Service Department
P.O. Box 44988
Madison, WI 53744 - 4988
Customer Service & Parts / Warranty Claims
Phone #: (800) 222 - 7820
Technical Assistance
Phone #: (800) 919 - 8324
Customer Service & Technical Assistance
Facsimile #: (608) 441 - 5887
Parts / Warranty Claims
Facsimile #: (608) 441 - 5886
Service Department E-Mail Address:
customerservice@subzero.com
Office Hours:
7:00 AM to 7:00 PM Central Time
Monday through Friday
This manual is designed to be used by Authorized Service Personnel only. Sub-Zero Freezer Co., Inc.
assumes no responsibility for any repairs made on Sub-Zero refrigeration units by anyone other than
Authorized Service Technicians.
IMPORTANT SAFETY INFORMATION
Below are the Product Safety Labels used in this
manual. The "Signal Words" used are WARNING
or CAUTION.
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.
The sample Product Safety Labels below illustrate
the precautions that should be taken when the signal word is observed.
INTRODUCTION
This 700-3 Series Base Unit Technical Service Manual, Part #3758424, has been compiled to provide the
most recent information on safety, installation, set-up, design, operation, features, troubleshooting, wiring
diagrams, and repair procedures of the 700-3 Base units. This information will enable the service technician to troubleshoot and diagnose malfunctions, perform necessary repairs, and return a 700-3 Base unit
to proper operational status.
The service technician should read the complete instructions contained in this training/service manual
before initiating any repairs on a 700-3 Base unit.
INDICATES THAT HAZARDOUS OR UNSAFE PRACTICES COULD RESULT IN SEVERE PERSONAL
INJURY OR DEATH
Indicates that hazardous or unsafe practices could
result in minor personal injury or product and/or
property damage
In addition, please pay attention to the signal word
“NOTE”, which highlights information that is espe-
cially important for the topic being covered.
The information and images contained in this manual are the copyright property of Sub-Zero Freezer Company, Inc.
Neither this manual nor any information or images contained herein may be copied or used in whole or in part with-
out the express written consent of Sub-Zero Freezer Company, Inc. © all rights reserved.
General Information
Integrated
(700-3BASE)
Series
1-3
#3758424 - Revision B - December, 2005
Section 1 - General Information 1-1
Introduction ....................................................................... 1-2
Important Safety Information ............................................ 1-2
Technical Assistance ........................................................ 1-2
Table of Contents .............................................................. 1-3
Warranty Information ........................................................ 1-5
Model Description ............................................................. 1-6
Section 2 - Installation Information 2-1
Installation Considerations ............................................... 2-2
Unit leveling .................................................................. 2-2
Drawer Adjustment ....................................................... 2-3
Dual Unit Installation ..................................................... 2-3
Section 3 - Electronic Control System Information 3-1
Electronic Control Terminology &
Component Descriptions .................................................. 3-2
Electronic Control System Overview ............................... 3-3
Control Board Layout & Summary Table ....................... 3-4
Control Panel Layout ....................................................... 3-5
Basic Electronic Control Input Operations ...................... 3-6
Unit ON/OFF ................................................................ 3-6
Adjusting Set-Point (Temp. Adjustment) ...................... 3-6
Icemaker System ON/OFF ............................................ 3-7
Door Ajar Alarm ON/OFF ............................................ 3-7
Unique Electronic Control Input Operations .................... 3-8
Temperature Units Selection Mode ............................ 3-8
Sabbath Mode ............................................................. 3-8
Showroom Mode ......................................................... 3-9
Manual Freezer Evaporator Defrost ............................ 3-9
Functions of Electronic Control System ......................... 3-10
Display Zone Temperatures ........................................ 3-10
Supply Power to Lighting System .............................. 3-10
Regulate Freezer Zone Temperature (BC/BF) ............ 3-11
Regulate Refrigerator Zone Temperature (BC) ........... 3-12
Regulate Refrigerator Zone Temperature (BR) ........... 3-13
“Adaptive Defrost” (BC/BF) ......................................... 3-14
Fan-Assisted Off-Cycle Defrost“ (BR) ......................... 3-15
Monitor Compressor Run - Display SERVICE ............ 3-16
Monitor Ice Maker System - Display ICE/SERVICE .... 3-17
Possible Error Indicators ............................................... 3-18
Troubleshooting Input Operations ................................... 3-19
Diagnostic Mode ........................................................ 3-19
Thermistor Location Code Tables .......................... 3-19
Diagnostic Mode Indicators ..................................... 3-20
Error Code Table ..................................................... 3-20
Manual Component Activation Mode .......................... 3-21
Temperature Log Recall Mode .................................... 3-22
Compartment Temperature History Only ................. 3-22
Compartment & Evaporator Temperature History .... 3-23
Temperature Log Event Indicators ........................... 3-24
Temperature Log Index Chart .................................. 3-25
Service Input Operations ................................................. 3-26
Model Configuration Mode .......................................... 3-26
Model Code Table ....................................................... 3-26
Manual Entry Model Configuration Mode .................... 3-27
Section 4 - Sealed System Information 4-1
HFC-134a Refrigerant Service Information ...................... 4-2
General Rules for Working with 134a Refrigerant ........ 4-2
Sealed System Repair Procedures .............................. 4-3
Sealed System Operation ................................................ 4-4
Sealed System Refrigerant Flow Diagrams ..................... 4-6
Section 5 - Air Flow & Fan Blade Spacing 5-1
Model 700BCI-3 ............................................................... 5-2
Model 700BR-3 ................................................................ 5-2
Model 700BFI-3 ............................................................... 5-3
Section 6 - Icemaker Information 6-1
Modular Icemaker ........................................................... 6-2
Modular Icemaker Operation ...................................... 6-2
Additional Icemaker Operation Notes ......................... 6-3
What Happens During Ejector Blade Rotation ............ 6-3
Modular Icemaker Test Procedures ................................ 6-4
Voltage Tests ................................................................ 6-4
Continuity Tests & Thermostat Inspection ................... 6-4
Water Fill Adjustment ...................................................... 6-5
Icemaker Disassembly .................................................... 6-5
Module/Motor Assembly ............................................. 6-5
Mold/Heater Assembly ............................................... 6-5
Ejector Blades and/or Ice Stripper .............................. 6-5
Icemaker Thermostat ................................................. 6-5
TABLE OF CONTENTS
Page #
Page #
General Information
Integrated
(700-3BASE)
Series
1-4
#3758424 - Revision B - December, 2005
Section 7 - Component Access and Removal 7-1
Section Table of Contents .............................................. 7-2
WARNINGS & CAUTIONS .............................................. 7-2
Exterior Cosmetic and Mechanical Components ........ 7-3
Kickplate/Grille (All Base Units) ..................................... 7-3
Drawer Assembly (All Base Units) ................................. 7-3
Top Drawer Assembly................................................ 7-3
Bottom Drawer Assembly........................................... 7-3
Side Trim Molding Strip (All Base Units) ....................... 7-4
Drawer Gasket (All Base Units) .................................. 7-4
Interior Cosmetic, Mechanical Components................ 7-5
Control Panel Assembly (All Base Units) ...................... 7-5
Display Wire Harness (All Base Units) ......................... 7-5
Lighting Bulb & Socket (All Base Units) ....................... 7-5
Mullion Divider (700BC/I-3 ) ......................................... 7-6
Wire Tray (700BR-3, 700BF/I-3) ................................... 7-6
Drawer Closer Assembly (All Base Units) .................... 7-6
Drawer Slide Assembly (All Base Units) ....................... 7-7
Refrigerator Fan Baffle & Shroud (700BC/I-3) .............. 7-7
Refrigerator Light Switch (700BC/I-3) ........................... 7-7
Refrigerator Fan Baffle & Cold Plate(700BR-3) ............ 7-8
Refrigerator Fan Motor (700BC/I-3, 700BR-3)) ............ 7-8
Refrigerator Compartment Thermistor (700BC/I-3) ....... 7-8
Refrigerator Compartment Thermistor (700BR-3) ........ 7-9
Refrigerator Light Switch (700BR-3) ............................. 7-9
Refrigerator Evaporator Thermistor (700BR-3) ............ 7-9
Icemaker Assembly (700BCI-3, 700BFI-3) ................ 7-10
Sump Cover Assembly (700BCI-3, 700BFI-3) ........... 7-10
Lower Air Duct (700BC/I-3) ....................................... 7-11
Air Baffle Control Assembly (700BC/I-3) ..................... 7-11
Freezer Compartment Thermistor (700BC/I-3) .......... 7-11
Freezer Light Switch (700BC/I-3) ............................... 7-11
Freezer Light Switch / Icemaker Switch (700BF/I-3) .. 7-12
Freezer Compartment Thermistor (700BF/I-3) ........... 7-12
Freezer Evap. Thermistor (700BC/I-3,700BF/I-3) ....... 7-13
Defrost Terminator (700BC/I-3, 700BF/I-3) ................. 7-13
Defrost Heater (700BC/I-3, 700BF/I-3) ....................... 7-13
Control Board Assembly (700BC/I-3, 700BF/I-3) ....... 7-14
Evaporator Fan Assembly (700BC/I-3, 700BF/I-3) ..... 7-14
Compressor Area Mechanical Components .............. 7-15
Main Control Board (700BR-3) .................................. 7-15
Icemaker Water Valve Assy
(700BCI-3, 700BFI-3, Prior to Serial #2421189) ......... 7-16
Icemaker Water Valve Assy
(700BCI-3, 700BFI-3, Starting w/Serial #2421189) ..... 7-17
Condenser Fan Assembly (All Base Units) ................. 7-18
Drain Tube Heater (700BC/I-3, 700BF/I-3) ................. 7-19
Sealed System Components ....................................... 7-20
High-Side Filter-Drier (All Base Units) ........................ 7-20
Compressor (All Base Units) ...................................... 7-21
Condenser (All Base Units) ........................................ 7-22
Evap./Heat Exchanger Assy (700BC/I-3, 700BF/I-3) .. 7-23
Evaporator (700BR-3) ................................................. 7-24
Page #
Page #
Section 8 - Troubleshooting Guides 8-1
Troubleshooting Guides .................................................... 8-2
How to Use the Error Code Troubleshooting Guide .......... 8-2
Error Code Table ............................................................ 8-2
Error Code Troubleshooting Guide ................................... 8-3
How to Use the General Troubleshooting Guide .............. 8-6
Temperature Problem Instructions ................................ 8-6
Thermistor Location Code Tables ................................ 8-6
General Troubleshooting Table of Contents ...................... 8-7
General Troubleshooting Guide ......................................... 8-8
Sealed System Troubleshooting / Diagnostic Tables .... 8-16
Normal Operating Pressures Table ............................. 8-16
Pressure Indications Table .......................................... 8-16
Temperature/Pressure Table ....................................... 8-17
Membrane Switch / Ribbon Cable Test .......................... 8-18
Section 9 - Technical Data Tables 9-1
Model 700BC/I-3 .............................................................. 9-2
Model 700BR-3 ................................................................ 9-3
Model 700BF/I-3 .............................................................. 9-4
Section 10 - W
iring Diagrams 10-1
700BC/I-3 Wiring Diagram (PTS #2300444) .................. 10-2
700BC/I-3 Wiring Schematic (PTS #2300444) ............ 10-3
700BC/I-3 Wiring Diagram (SWS #2300444) ................. 10-4
700BC/I-3 Wiring Schematic (SWS #2300444) .......... 10-5
700BR-3 Wiring Diagram ................................................ 10-6
700BR-3 Wiring Schematic......................................... 10-7
700BF/I-3 Wiring Diagram .............................................. 10-8
700BF/I-3 Wiring Schematic........................................ 10-9
General Information
Integrated
(700-3BASE)
Series
1-5
#3758424 - Revision B - December, 2005
700BCI 2 0000000
9.0 8.1 R134a
Figure 1-1. Serial Tag Layout
(The serial number tag is located on the left side wall of the upper drawer compartment.)
Jan 2004
Model Number
Serial Number
Manufacture Date
Refrigerant Charge
To ta l Amps Refrigerant Type
REFRIGERATOR FREEZER TOTAL AMPS REFRIGERANT
WARRANTY INFORMATION
This page summarizes the 2, 5 & 12 Year Warranty
supplied with every unit, as well as the two special warranties: The Non-Residential Warranty which applies to
units installed in non-residential applications, and the
Display/Model Home Warranty which applies to distributor or dealer’s display units and units in model homes,
sold three years after date of manufacture. The last
entries on this page are details and notes about the
warranties.
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.
ONE & FIVE YEAR Non-Residential Warranty
Summary (Example: Office, Yacht, etc.)
• One Year TOTAL PRODUCT warranty, *parts and
labor.
• Five year LIMITED SEALED SYSTEM warranty,
sealed system **parts only.
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.
Warranty Details:
• * Total Product Parts includes, but is not limited to the
following:
Electronic Control System Components, Fan & Light
Switches, Fan Motors & Blades, Defrost & Drain
Heaters, Defrost Terminators, Drain Pans, Drain Tubes,
Wiring, Light sockets & bulbs, Icemakers, Water
Valves, Door hinges, Door closers & Cams,
Compressor Electricals, etc. . .
• ** Sealed System Parts include the following:
Compressors, Condensers, Evaporators, Filter-Driers,
Heat-exchangers, All Tubing That Carries the Freon.
NOTE: Condenser Fan Motors, Freon, Solder and
compressor electricals are NOT
considered sealed
system parts.
Warranty Notes:
• All warranties begin at the time of the unit's initial
installation.
• All Warranty and Service information collected by SubZero is arranged and stored under the unit serial number. This information is now also stored under the customer's last name.
NOTE: Sub-Zero still requests that you have the
model and serial number available whenever contacting the factory or parts distributor.
• The serial number tag is located on the left side wall of
the upper drawer compartment. (See Figures 1-1, for
serial tag layout)
General Information
Integrated
(700-3BASE)
Series
1-6
#3758424 - Revision B - December, 2005
MODEL DESCRIPTIONS
This page briefly describes the Models 700BC-3, 700BCI-3, 700BF-3, 700BFI-3 and 700BR-3.
Model 700BC-3 (Figure 1-2)
700 Series, Base Combination, 3rd Design Build
(Combination Refrigerator / Freezer with Two Temperature
Zones - Upper Refrigerator over Freezer)
(Overall Dimensions = 34” H x 27” W x 24” D)
Model 700BCI-3 (Figure 1-7)
700 Series, Base Combination, Icemaker Incl., 3rd
Design Build
(Combination Refrigerator / Freezer with Two Temperature
Zones - Upper Refrigerator over Freezer)
(Overall Dimensions = 34” H x 27” W x 24” D)
Model 700BR-3 (Figure 1-3)
700 Series, Base Refrigerator, 3rd Design Build
(Refrigerator with One Temperature Zone)
(Overall Dimensions = 34” H x 27” W x 24” D)
Model 700BF-3 (Figure 1-4)
700 Series, Base Freezer, 3rd Design Build
(Freezer with One Temperature Zone)
(Overall Dimensions = 34” H x 27” W x 24” D)
Model 700BFI-3 (Figure 1-3)
700 Series, Base Freezer, Icemaker Incl., 3rd Design
Build
(Freezer with One Temperature Zone)
(Overall Dimensions = 34” H x 27” W x 24” D)
Figure 1-2. Model 700BC-3 & 700BCI-3
Upper
Refrigerator
Zone
Lower
Freezer
Zone
Figure 1-3. Model 700BR-3
Two Drawer
All Refrigerator
(One Zone)
Figure 1-4. Model 700BF-3 & 700BFI-3
Two Drawer
All Freezer
(One Zone)
Installation Information
Integrated
(700-3BASE)
Series
2-1
#3758424 - Revision B - December, 2005
SECTION 2
INSTALLATION
INFORMATION
Installation Information
Integrated
(700-3BASE)
Series
2-2
#3758424 - Revision B - December, 2005
UNIT COULD TIP FORWARD UNDER CERTAIN LOAD CONDITIONS. FAILURE TO INSTALL ANTI-TIP COMPONENTS AND EXTEND LEVELERS TO THE FLOOR ACCORDING TO INSTALLATION MANUAL COULD
RESULT IN SERIOUS PERSONAL INJURY OR DEATH.
INSTALLATION CONSIDERATIONS
This section covers some of the more common installation issues seen by a service technician. An improper installation, though not a valid service issue, has the potential to lead to a customer placing a call for service. Installation
related customer complaints could include, but are not limited to: Unit leveling, unit movement, door misalignment,
drawers not sealing, internal frost or condensation, warm compartment temperatures, exterior condensation, etc.. .
NOTE: If additional installation information is needed, refer to the complete Installation Manual and/or installation
video, or contact the Sub-Zero Technical Assistance Department.
Unit Leveling
NOTE: The kickplate/grille must be removed before
leveling (See Figure 2-1).
If unit has been anchored to cabinets, side molding
strips must be removed and anchor screws extracted
from unit to cabinet brackets before leveling (See
Figure 2-2).
Figure 2-2. Side Molding & Bracket
Figure 2-1. Kickplate/Grille Removal
Figure 2-3. Adjusting Front Levelers
To level unit, turn front leveling legs counterclockwise to
raise front or clockwise to lower it. To assist in turning
front leveling legs, use standard straight-blade screwdriver, placing it in foot of front leg, then rotate leveler
foot (See Figure 2-3).
Kickplate / Grille
Installation Information
Integrated
(700-3BASE)
Series
2-3
#3758424 - Revision B - December, 2005
Figure 2-4. Adjusting Rear Levelers
Rear levelers are adjusted at front of base by turning
Phillips head adjusting rod, which engages rear leveler
assembly. Turn rod clockwise to raise rear or counterclockwise to lower it (See Figure 2-4).
NOTE: Rear leveling legs will only move 1/16” for
every 18 revolutions of Phillips head adjusting rod.
Do not over torque. Use lowest torque setting on any
power screwdriver. Do not turn rear leveling legs by
hand, doing so will damage the assembly.
Door and Drawer Adjustment
Doors and drawers on 700-3 Series units are nonadjustable. Instead, door and/or drawer panels must be
adjusted if there are alignment problems. Refer to
Installation Manual and/or installation video for panel
installation and adjustment.
NOTE: Unit must be level before attempting to adjust
door and drawer panels.
Dual Unit Installations
• If two Base units are installed side by side and are
2” or less apart, use part #BBDUAL.
• If a Tall unit is installed next to a Base unit and they
are 2” or less apart, use part #BBDUAL.
NOTE: Complete installation instructions are supplied
with #BBDUAL and #TTDUAL packages.
If two or more units are placed side by side and are
2” or less apart, a dual unit heater package must be
applied to the left side of the right hand unit. Failure
to install the dual unit heater package could result
in exterior condensation between the units.
Figure 2-5. Dual Unit Heater Installation
Apply heater
to left side
of right hand
unit
Installation Information
Integrated
(700-3BASE)
Series
2-4
#3758424 - Revision B - December, 2005
Electronic Control System
Integrated
(700-3BASE)
Series
3-1
#3758424 - Revision B - December, 2005
SECTION 3
ELECTRONIC CONTROL
SYSTEM INFORMATION
Electronic Control System
Integrated
(700-3BASE)
Series
3-2
#3758424 - Revision B - December, 2005
ELECTRONIC CONTROL TERMINOLOGY & COMPONENT DESCRIPTIONS
All 700-3 Series units utilize an electronic control system which monitors, regulates, controls and displays a variety
of functions and operations in the appliance.
The table below defines some of the basic electronic control system terminology.
Term/Component Definition / Description
Main Control Board ..……....…… The printed-circuit board (PC Board) which contains a microprocessor, relays, triacs and
electrical connections that monitor and control all functions of the appliance.
Microprocessor ……….…....…... An electrical component on the control board which receives electrical signals from
other components, processes the information, then sends electrical signals to relays and
triacs on the board to open or close, switching components in the appliance ON or OFF.
Relay …………………….....……. An electrical component on the control board which switches other components in the
appliance ON or OFF when instructed to do so by the microprocessor.
Triac …………………….......…… Similar in function to the relay, the triac is a three terminal semiconductor for controlling
current in either direction.
Control Panel Assembly ….....… (Also referred to as the Control Keypad Interface), is that part of the electronic control
system where all input operations are performed.
Membrane Switch ……….……... Part of the control panel assembly, which consists of the function keys.
Keys (Function Keys) ……......... The “buttons” on the Membrane Switch used for input operations: “POWER”, “ALARM”,
“ICE MAKER”, “WARMER” and “COLDER”
LCD (Liquid Crystal Display) ..... A semi-liquid substance sandwiched between glass in the display of the control panel
assembly. The molecules of this semi-liquid substance have no specific orientation.
However, when electricity is applied to them, they react predictably, aligning and
straightening in such a way as to control light passage.
Indicators .....……..………….…... The words, numbers and icons that appear on the display of the control panel assembly
through the use of LCD’s.
Error Codes .………...…………... The code numbers that may appear on the display of the control panel assembly when
accessing Error Code History. Error Codes are logged if the unit experienced specific
problems related to electrical signals supplied by electrical components.
Temperature Units of Measure.... Temperature observed on the display of the control panel assembly may be in
Fahrenheit units of measure (°F) or Celsius units of measure (°C). A series of key
strokes allows the temperature units of measure to be switched to display as either °F
or °C.
Set-Point ……………...……….... The desired zone temperature, established by pressing the COLDER or WARMER
keys.
High Offset (Cut-in) ……...…...... As the zone air temperature cycles up and down, the high offset is the maximum zone
temperature that the electronic control system will allow before calling for cooling.
Low Offset (Cut-out)………........ As the zone air temperature cycles up and down, the low offset is the minimum zone air
temperature that the electronic control system will allow before interrupting cooling.
Thermistor ……………..………. (Also Referred to as a Temperature Sensor), is a resistor with which resistance changes
as the temperature around it changes. For electronic control system purposes, the
microprocessor measures the resistance, then displays it as a temperature reading.
Variable Speed Compressor …... A compressor that runs at varying speeds depending on the temperature detected in the
corresponding zone(s) of the appliance.
Electronic Control System
Integrated
(700-3BASE)
Series
3-3
#3758424 - Revision B - December, 2005
Figure 3-1. 700BCI-3 Wireing Schematic
ELECTRONIC CONTROL SYSTEM OVERVIEW
This page contains the wiring schematic of the model 700BCI-3. Input operations for the electronic control system
are performed at the control panel (located inside the upper drawer), with monitoring, regulating and controlling functions taking place at the main control board. Temperatures and possible problems with the unit are shown in the
control panel display. The entire electronic control system is described in greater detail on the following pages.
NOTE: For more detailed electrical diagrams refer to the wiring diagram and schematic supplied with the unit.
LOW VOLTAGE SCHEMATIC
REF AIR DUCT
DISPLAY
BAFFLE
MEMBRANE KEYPAD
DISPLAY BOARD
THERMISTOR LOWER
DRAWER/FREEZER
PIN 1
PIN 1
THERMISTOR
EVAPORATOR
J2
J3
YELLOW W/WHITE
YELLOW W/BLACK STRIPE
YELLOW W/RED STRIPE
ORANGE W/RED STRIPE
BLUE W/RED STRIPE
BLUE W/BLACK STRIPE
BLUE W/BLACK STRIPE
BLUE W/YELLOW STRIPE
BLUE W/YELLOW STRIPE
RED
WHITE
BLACK
BLUE
ORANGE
YELLOW
J6
J5
J2
PIN 1
MAIN BOARD
PIN 1
J4
PIN 1
PIN 1
P4
P3
P1
P2
PIN 1
J3
HIGH VOLTAGE SCHEMATIC
TAN
ORANGE
GRAY W/WHITE STRIPE
J2
PIN 1
MAIN BOARD
ORANGE W/BLACK STRIPE
PIN 1
J6
J4
PIN 1
PIN 1
J5
P4
P3
P1
P2
PIN 1
THERMISTOR UPPER
DRAWER/REFRIGERATOR
115 VOLTS
60 CYCLES
L1
WHITE
BLACK
BLUE
J3
YELLOW
PINK
NEUTRAL
WHITE
GRAY
PURPLE
ORANGE
REF LIGHT
SWITCH
RED
BLUE
FRZ LIGHT
SWITCH
OVERLOAD
PROTECTOR
CONDENSER FAN
GRAY W/WHITE STRIPE
GRAY W/WHITE STRIPE
DEFROST
TERMINATOR
REF (TOP)
DRAWER LIGHT
M
REF FAN
MOTOR
M
FRZ (BOTTOM)
DRAWER LIGHT
COMPRESSOR
M
FRZ FAN MOTOR
M
FILL TUBE HEATER
RUNNING
CAPACITOR
COMPRESSOR
STARTING
RELAY
DEFROST HEATER
25 - 29 OHMS
DRAIN HEATER
1700 - 2100 OHMS
2800 - 3500 OHMS
WHITE
(WHEN
USED)
ORANGE W/BLACK STRIPE
ORANGE
TAN
ICEMAKER
SWITCH
THERMAL
FUSE
ICEMAKER
(OPTIONAL)
TAN
ICEMAKER
VALVE
3757971 REV A
Electronic Control System
Integrated
(700-3BASE)
Series
3-4
#3758424 - Revision B - December, 2005
Figure 3-2. Main Control Board Layout
Figure 3-3. Main Control Board Summary Table
MAIN CONTROL BOARD LAYOUT AND SUMMARY TABLE
Electrical connection points on the main control board are labeled alphanumerically. These labels correspond with
the alphanumeric summary table, located on the wiring diagram. By referencing the summary table, it is possible to
identify which components are connected at which points on the main control board. Below is a layout diagram of
the main control board, and a copy of a model 700BCI-3 summary table. (See Figures 3-2 & 3-3)
NOTE: All components on the control board are non-replaceable. If a problem with the control board is identified,
the complete control board must be replaced.
NOTE: There is also a small control board in the control panel assembly (Not Shown). All components in the control panel assembly are non-replaceable. If a problemwith the control panel is identified, the complete control panel
assembly must be replaced.
J5
PIN 1
J3
MAIN CONTROL BOARD SUMMARY
TERMINAL
120 VOLT CIRCUITS
LOW VOLTAGE THERMISTOR CIRCUITS
J5-1,2
J5-3,4
J5-5,6
P4
P3
P1
P2
J3-1
J3-2
J3-3
J3-4
J3-5
J3-6
J3-7
J2-1
J2-2
J2-3
J2-4
J5-7
J5-8
J6-1
J6-2
J6-3
J4-1
J4-2
J4-3
J4-4
J4-5
J4-6
CIRCUIT
COMPRESSOR
DEFROST
FAN 1
FAN 2
LIGHTS
UPPER
LOWER
EVAP
EVAP
DISPLAY
DISPLAY
DISPLAY
DISPLAY
DISPLAY
DESCRIPTION
LN
NEUTRAL
POWER IN
L1
COMPRESSOR
DEFROST HEATER
EVAPORATOR FAN
NOT USED
ICE MAKER
ICE
NOT USED
REFRIGERATOR FAN
NOT USED
LIGHTS
FRZ DRAWER LIGHT SENSE
LWR
REF DRAWER LIGHT SENSE
UPR
DEFROST SENSOR
DEF
ICE MAKER VALVE SENSOR
ICE
NOT USED
REFRIGERATOR COMPARTMENT
FREEZER COMPARMENT
EVAPORATOR
EVAPORATOR
N
BAFFLE NEUTRAL
C
BAFFLE CLOSE
BAFFLE OPEN
O
DISPLAY WIRING
DISPLAY WIRING
DISPLAY WIRING
DISPLAY WIRING
DISPLAY WIRING
DISPLAY WIRINGDISPLAY
J6
J4
PIN 1
PIN 1
PIN 1
P2 P1 P3 P4
NEUTRAL INTO BOARD
POWER INTO BOARD
POWERS COMPRESSOR AND CONDENSER FAN
POWERS DEFROST CIRCUIT AND FILL TUBE HEATER
POWERS EVAPORATOR FAN
POWERS ICE MAKER
POWERS FFAN IN REFRIGERATOR
POWERS LIGHTS
SENSES IF FREEZER DRAWER OPEN
SENSES IF REFRIGERATOR DRAWER OPEN
SENSES WHEN DEF HEATER SHUTS OFF
SENSES WATER VALVE ACTIVATION
SENSES REFRIGERATOR CABINET TEMPERATURE
SENSES FREEZER CABINET TEMPERATURE
SENSES EVAPORATOR TEMPERATURE
SENSES EVAPORATOR TEMPERATURE
BAFFLE NEUTRAL
PULSED TO CLOSE BAFFLE
PULSED TO OPEN BAFFLE
12VDC POWER SUPPLY FOR DISPLAY BOARD
12VDC POWER SUPPLY FOR DISPLAY BOARD
SERIAL DATA RECEIVE
SERIAL DATE TRANSMIT
GROUND FOR DISPLAY BOARD POWER SUPPLY
GROUND FOR DISPLAY BOARD POWER SUPPLY
PIN 1
J2
COLORFUNCTION
WHITE
BLACK
PURPLE
BLUE
RED
PINK
GRAY
YELLOW
ORANGE/BLACK
ORANGE
GRAY/WHITE
TAN
BLUE/YELLOW
BLUE/BLACK
BLUE/RED
ORANGE/RED
YELLOW/RED
YELLOW/BLACK
YELLOW/WHITE
BLACK
WHITE
RED
YELLOW
ORANGE
BLUE
Electronic Control System
Integrated
(700-3BASE)
Series
3-5
#3758424 - Revision B - December, 2005
CONTROL PANEL LAYOUT
NOTE: The LCD on the base units is not back lit. It will appear darker than the LCD on tall units.
Figure 3-4. 700BCI-3 Control Panel Layout
FREEZER SET-POINT
ADJUSTMENT KEYS
REFRIGERATOR SET-POINT
ADJUSTMENT KEYS
LCD
(Liquid Crystal Display)
DRAWER AJAR
ALARM ON/OFF KEY
UNIT
ON/OFF KEY
ICE
ON/OFF KEY
Figure 3-5. 700BR-3 Control Panel Layout
REFRIGERATOR SET-POINT
ADJUSTMENT KEYS
LCD
(Liquid Crystal Display)
DRAWER AJAR
ALARM ON/OFF KEY
UNIT
ON/OFF KEY
Figure 3-6. 700BFI-3 Control Panel Layout
FREEZER SET-POINT
ADJUSTMENT KEYS
LCD
(Liquid Crystal Display)
DRAWER AJAR
ALARM ON/OFF KEY
UNIT
ON/OFF KEY
ICE
ON/OFF KEY
SERVICE
ICE
OFF
SERVICE
OFF
FREEZER
WARMERCOLDER
WARMERCOLDER
REFRIGERATOR
REFRIGERATOR
WARMERCOLDER
ON/OFF
UNITICE
ON/OFF
ON/OFF
UNIT
ON/OFF
ON/OFF
SERVICE
ICE
OFF
WARMERCOLDER
FREEZER
ON/OFF
ON/OFF
UNITICE
ON/OFF
Electronic Control System
Integrated
(700-3BASE)
Series
3-6
#3758424 - Revision B - December, 2005
WHEN IN OFF MODE, 115 VOLTS AC IS STILL PRESENT AT CONTROL BOARD.
Figure 3-7. Unit ON/OFF - Press UNIT ON/OFF Key
BASIC ELECTRONIC CONTROL INPUT OPERATIONS
The following pages describe the basic input operations performed at A 700BCI-3 control panel (switching unit ON
and OFF; adjusting set-point (temperature adjustment); switching ice maker system ON and OFF and enabling and
disabling door ajar alarm feature. Please note that though possible to display temperatures in Fahrenheit or Celsius,
in most cases Fahrenheit readings are shown.
Unit ON/OFF
All units are shipped in Off Mode. When power is supplied to the unit, a trace of the word “OFF” is visible on the
LCD. By pressing the UNIT ON/OFF key (See Figure 3-7), power is allowed past the control board to the rest of the
unit. This will be indicated by the unit lights illuminating and the LCD energizing.
NOTE: Whenever the unit is switched OFF using the UNIT ON/OFF key, a trace of the word “OFF” will be visible on
the LCD as long as power is supplied to the unit. This differs in Sabbath Mode, which will be covered later.
Adjusting Set-Point (Temperature Adjustments)
To adjust set-points, press WARMER or COLDER keys on control panel in multiple key strokes
until the desired set-
point is achieved. One key stroke equals one degree change (Fahrenheit or Celsius). (See Figure 3-8)
NOTE: Temperature ranges are -5°F (-21°C) to +5°F (-15°C) in freezer zones, +34°F (+1°C) to +45°F (+7°C) in
refrigerator zones, with initial set-points of 0°F (-18°C) and +38°F (+3°C), respectively.
NOTE: The initial stroke of the WARMER or COLDER keys will change previous set-point by one degree.
NOTE: The set-point will be displayed on the LCD for 10 seconds after the last WARMER or COLDER key stroke.
After the 10 second delay, the zone temperature will be displayed. As the zone temperature changes, the temperature displayed on the LCD will change by no more than one degree per minute.
Figure 3-8. Adjusting Set-Point - Press WARMER or COLDER Key In Multiple Key Strokes
FREEZER
WARMERCOLDER
WARMERCOLDER
REFRIGERATOR
ON/OFF
ON/OFF
UNITICE
ON/OFF
FREEZER
WARMERCOLDER
WARMERCOLDER
REFRIGERATOR
ON/OFF
ON/OFF
UNITICE
ON/OFF
Electronic Control System
Integrated
(700-3BASE)
Series
3-7
#3758424 - Revision B - December, 2005
Icemaker System ON/OFF
All units with icemakers are shipped with the icemaker system switched OFF. By pressing the ICE ON/OFF key on
the control panel, power is allowed to the icemaker system, and “ICE” appears on the LCD (See Figure 3-9). To
disable the icemaker system, press the ICE ON/OFF key again and “ICE” will disappear from the LCD indicating the
icemaker system is OFF.
NOTE: When unit is in “Sabbath Mode,” icemaker system is disabled. Sabbath Mode will be covered later.
NOTE: To allow ice to freeze fully and reduce effects of low water pressure, power to the icemaker system is inter-
rupted for 45 minutes after each ice harvest. This can be bypassed for service purposes by pressing the ICE
ON/OFF key to switch the icemaker system OFF, then back ON.
Figure 3-9. Icemaker System ON/OFF - Press ICE ON/OFF Key
Ice system is active if “ICE” is displayed
Drawer Ajar Alarm ON/OFF
All units are equipped with a drawer ajar alarm feature. When activated, the alarm will alert a customer if a drawer
is stuck open or accidentally left open. To enable the drawer ajar alarm feature, press the drawer ajar alarm bell
ON/OFF key on the control panel. A bell icon will appear on the LCD indicating that the alarm feature is active.
(See Figure 3-10) Now, if a drawer is open for 30 seconds, the bell icon will blink and the audible alarm will beep.
To disable the drawer ajar alarm, simply press the drawer ajar alarm bell ON/OFF key and the bell icon on the LCD
will disappear, indicating the alarm feature is OFF.
Figure 3-10. Drawer Ajar Alarm ON/OFF - Press Alarm Bell ON/OFF Key
Alarm is active if bell is displayed
ICE
FREEZER
WARMERCOLDER
WARMERCOLDER
REFRIGERATOR
ON/OFF
ON/OFF
UNITICE
ON/OFF
FREEZER
WARMERCOLDER
WARMERCOLDER
REFRIGERATOR
ON/OFF
ON/OFF
UNITICE
ON/OFF
Electronic Control System
Integrated
(700-3BASE)
Series
3-8
#3758424 - Revision B - December, 2005
UNIQUE ELECTRONIC CONTROL INPUT OPERATIONS
The following pages describe unique electronic control input operations performed at the control panel that you
would not expect a customer to perform every day. The following input operations described are Temperature Unit
Selection Mode, Sabbath Mode, Showroom Mode, and Manual Freezer Evaporator Defrost.
Temperature Units Selection Mode (Selecting Degrees Fahrenheit or Degrees Celsius Display)
The electronic control is initially set to display temperature in Fahrenheit (°F) units of measure. Units of measure
can be converted from °F to °C (Celsius), and/or back again. This operation is called Temperature Units Selection.
NOTE: Temperature Units Selection must be performed within the first minute after switching the unit ON.
To convert the temperature units of measure from Fahrenheit readings to a Celsius readings, press and hold the
door ajar alarm bell ON/OFF key and the UNIT ON/OFF key simultaneously for 5 seconds, then release the keys.
“ °C “ will appear on the LCD indicating temperatures will now be displayed in Celsius units of measure. (See Figure
3-11) To convert back to Fahrenheit units of measure, repeat the steps above.
NOTE: Bottom Drawer must be closed. If not closed, unit will enter Model Configuration Mode.
NOTE: Temperature Units Selection Mode will end 10 seconds after the last key stroke.
Figure 3-11. Converting Temperature Units of Measure (within first minute after switching unit ON)
Press and Hold the Bell ON/OFF Key and UNIT ON/OFF Key for 5 Seconds
Sabbath Mode
Sabbath Mode was incorporated into the electronic control system for the observance of certain religious days.
Initiating Sabbath Mode disables the LCD, lighting system, icemaker systems and the door ajar alarm feature.
To initiate Sabbath Mode, the unit must first be switched OFF using the UNIT ON/OFF key (See Figure 3-12), then
press and hold the UNIT ON/OFF key for approximately 10 seconds, until the LCD and lights switch OFF (See
Figure 3-13). To return to normal operation, press and release the UNIT ON/OFF key.
NOTE: During Sabbath Mode, the refrigerator fan and evaporator fan may function when drawers are open.
NOTE: During Sabbath Mode, the LCD is disabled and set-points cannot be changed.
Figure 3-13. After Unit is Switched OFF, Press and Hold UNIT ON/OFF Key for 10 Seconds
Figure 3-12. To Enter Sabbath Mode, Switch Unit OFF First
Press and hold for 10 seconds
Press and hold for 5 seconds
FREEZER
WARMERCOLDER
WARMERCOLDER
REFRIGERATOR
ON/OFF
ON/OFF
UNITICE
ON/OFF
OFF
FREEZER
WARMERCOLDER
WARMERCOLDER
REFRIGERATOR
ON/OFF
ON/OFF
UNITICE
ON/OFF
FREEZER
WARMERCOLDER
WARMERCOLDER
REFRIGERATOR
ON/OFF
ON/OFF
UNITICE
ON/OFF
Electronic Control System
Integrated
(700-3BASE)
Series
3-9
#3758424 - Revision B - December, 2005
Showroom Mode
Showroom Mode was incorporated into the electronic control system so that units could be displayed in a showroom
setting. When in Showroom Mode, all cooling functions are disabled, but the lighting system and LCD remain
active.
To initiate Showroom Mode, the unit must first be switched OFF using the UNIT ON/OFF key (See Figure 3-14).
With the unit switched OFF, press and hold either pair of WARMER and COLDER keys, then press the UNIT
ON/OFF key, then release all three keys (See Figure 3-15).
To return unit to normal operating condition, repeat the steps above.
NOTE: Always recheck set-points after returning unit to normal operating condition.
NOTE: It is possible to determine if a unit is in Showroom Mode by initiating Diagnostic Mode. If “Sr” is observed in
the left temperature display area during Diagnostic Mode, the unit is in Showroom mode. Initiating Diagnostic Mode
is covered later in this section.
Figure 3-15. After Unit is Switched OFF, Press and Hold the WARMER and COLDER Keys,
Then Press the UNIT ON/OFF Key
Figure 3-14. To Enter (or Exit) Showroom Mode, Switch Unit OFF First
Manual Freezer Evaporator Defrost
Manual Freezer Evaporator Defrost was incorporated into the electronic control to assist in servicing the appliance.
To manually defrost the freezer evaporator, press and hold the ICE ON/OFF key for 5 seconds (See Figure 3-16).
NOTE: Manual Freezer Evaporator Defrost will not operate if unit is in Sabbath Mode.
Figure 3-16. Initiate Manual Freezer Evaporator Defrost - Press and Hold the ICE key for 5 Seconds
Press and hold for 5 seconds
OFF
FREEZER
WARMERCOLDER
WARMERCOLDER
REFRIGERATOR
ON/OFF
ON/OFF
UNITICE
ON/OFF
FREEZER
WARMERCOLDER
WARMERCOLDER
REFRIGERATOR
ON/OFF
ON/OFF
UNITICE
ON/OFF
ICE
FREEZER
WARMERCOLDER
WARMERCOLDER
REFRIGERATOR
ON/OFF
ON/OFF
UNITICE
ON/OFF
Electronic Control System
Integrated
(700-3BASE)
Series
3-10
#3758424 - Revision B - December, 2005
FUNCTIONS OF ELECTRONIC CONTROL SYSTEM
The following few pages explain monitoring, regulating and controlling functions of the electronic control system.
Display Zone Temperatures
The temperature signals from the thermistors in the refrigerator and freezer compartments are monitored by the
microprocessor and then displayed on the LCD. Though the compartment air temperature does fluctuate, the LCD
displays the average temperature (See Figure 3-17).
NOTE: If zone temperature changes, temperature display will change by one degree per minute.
Figure 3-17. Display Zone Temperatures
Average temperature displayed
Figure 3-18. 700BCI-3 Signal Trace Schematic (High Voltage) of Lighting System
1. 115 Volts are supplied to
lighting system unless
unit is switched OFF, or
in Sabbath Mode.
2. Light switch position monitored
for alarm and fan operation.
Supply Power to the Lighting System
Power is supplied to the lighting system through the control board when the unit is switched ON by pressing UNIT
ON/OFF key. With a drawer open, the light switch allows power to the light. (See Figure 3-18).
NOTE: Power to the lights is monitored by the microprocessor to control the door ajar alarm feature and to help
control the operation of the evaporator fan and/or refrigerator compartment fan.
NOTE: When in Sabbath Mode, lighting system is disabled. Sabbath Mode will be covered later.
FREEZER
WARMERCOLDER
WARMERCOLDER
REFRIGERATOR
ON/OFF
ON/OFF
UNITICE
ON/OFF
HIGH VOLTAGE SCHEMATIC
ORANGE
J2
PIN 1
MAIN BOARD
ORANGE W/BLACK STRIPE
PIN 1
J6
J4
PIN 1
PIN 1
J5
PIN 1
115 VOLTS
60 CYCLES
L1
NEUTRAL
WHITE
WHITE
P4
BLACK
P3
P1
P2
YELLOW
ORANGE
REF LIGHT
SWITCH
J3
FRZ LIGHT
SWITCH
REF (TOP)
DRAWER LIGHT
M
M
FRZ (BOTTOM)
DRAWER LIGHT
WHITE
M
M
ORANGE W/BLACK STRIPE
ORANGE
Electronic Control System
Integrated
(700-3BASE)
Series
3-11
#3758424 - Revision B - December, 2005
Regulate Freezer Zone Temperature (700BCI-3, 700BFI-3)
When the thermistor in the freezer compartment reaches high off-set temperature, calling for cooling, the compressor and condenser fan are energized, but the evaporator fan is not allowed to run until the thermistor on the evaporator reaches 35°F (2°C). (See Figure 3-19)
If either drawer is opened while the evaporator fan is operating, the microprocessor will detect the power signal to
the lights and cut power to the fan.
Though compartment air temperatures will fluctuate, LCD displays average temperature.
NOTE: If compartment temperature exceeds either high or low offset (Ex: drawer is left open), temperature display
will change by one
degree per minute.
NOTE: If freezer
compartment thermistor is faulty, compressor operation defaults
to 20 minutes ON, 20
minutes OFF cycling,
EE appears in left of
LCD, SERVICE will
flash and Error Code
07 will be logged.
NOTE: If evaporator
thermistor is faulty,
the compressor will
be energized after
the dwell time and
the evaporator fan
will be energized 3
minutes later. SERVICE will flash and
Error Code 08 will be
logged.
NOTE: When in
Sabbath Mode, the
freezer compartment
thermistor still controls compressor
operation, except
there is a random 15
to 25 second delay
before the compressor is energized.
Figure 3-19. 700BCI-3 Signal Trace - Regulate Freezer Zone
1. Thermistor at high off-set
temp. calling for cooling.
2. No signal
to lights.
3. Compressor and
condenser fan
energized.
4. Evap Thermistor
below 35°F (2°C).
5. Evap fan
energized.
LOW VOLTAGE SCHEMATIC
J6
J5
J2
PIN 1
MAIN BOARD
PIN 1
J4
PIN 1
PIN 1
P4
P3
P1
P2
PIN 1
J3
DISPLAY
HIGH VOLTAGE SCHEMATIC
MEMBRANE KEYPAD
DISPLAY BOARD
THERMISTOR LOWER
DRAWER/FREEZER
115 VOLTS
60 CYCLES
PIN 1
PIN 1
THERMISTOR
EVAPORATOR
J2
J3
ORANGE W/RED STRIPE
BLUE W/RED STRIPE
BLUE W/BLACK STRIPE
BLUE W/BLACK STRIPE
L1
ORANGE
J2
PIN 1
MAIN BOARD
ORANGE W/BLACK STRIPE
PIN 1
J6
J4
PIN 1
PIN 1
J5
ORANGE W/BLACK STRIPE
ORANGE
PIN 1
NEUTRAL
WHITE
WHITE
P4
BLACK
P3
P1
P2
PURPLE
RED
OVERLOAD
PROTECTOR
CONDENSER FAN
M
COMPRESSOR
M
M
M
FRZ FAN MOTOR
FRZ (BOTTOM)
DRAWER LIGHT
YELLOW
ORANGE
REF LIGHT
SWITCH
FRZ LIGHT
SWITCH
REF (TOP)
DRAWER LIGHT
J3
RUNNING
CAPACITOR
COMPRESSOR
STARTING
RELAY
WHITE
(WHEN
USED)
Electronic Control System
Integrated
(700-3BASE)
Series
3-12
#3758424 - Revision B - December, 2005
Regulate Refrigerator Zone Temperature (700BCI-3)
When the thermistor in refrigerator compartment reaches high off-set temperature, calling for cooling, the refrigerator
compartment fan is energized and microprocessor sends an 18 Volt pulse signal to the air baffle control to open,
regardless of operational state of the compressor. Whenever the fan is energized, the microprocessor repeats sending a pulse signal every 5 minutes to the air baffle control to open. (See Figure 3-20)
If either drawer is opened while the refrigerator compartment fan is operating, the microprocessor will detect power
to the lights and cut power to the fan.
When thermistor in refrigerator compartment reaches low off-set temperature, power to refrigerator compartment fan
is cut and microprocessor sends an
18 Volt pulse signal
to the air baffle control to close. When
refrigerator compartment fan is off, microprocessor repeats
sending a pulse signal every 5 minutes
to the air baffle control to close.
Though compartment
air temperatures fluctuates, the LCD displays average temperature.
NOTE: If compartment temperature
exceeds either high
or low offset (Ex:
drawer is left open),
temperature display
will change by one
degree per minute.
NOTE: If refrigerator
compartment thermistor is faulty, compartment fan defaults to
20 minutes ON, 40
minutes OFF cycling,
EE appears in right of
LCD, SERVICE will
flash and Error Code
05 will be logged.
NOTE: When in
Sabbath Mode, refrigerator compartment
thermistor still controls fan operation
except there is a random 15 to 25 second
delay before the fan
is energized.
Figure 3-20. 700BCI-3 Signal Trace - Regulate Refrigerator Zone
1. Thermistor at high off-set
temp. calling for cooling.
2. No power to ref. light.
3. Ref. fan energized.
4. Pulse signal to air baffle
control every 5 minutes.
LOW VOLTAGE SCHEMATIC
DISPLAY
REF AIR DUCT
BAFFLE
MEMBRANE KEYPAD
DISPLAY BOARD
THERMISTOR UPPER
DRAWER/REFRIGERATOR
PIN 1
PIN 1
J2
J3
YELLOW W/WHITE
YELLOW W/BLACK STRIPE
YELLOW W/RED STRIPE
BLUE W/YELLOW STRIPE
BLUE W/YELLOW STRIPE
J6
J5
J2
PIN 1
MAIN BOARD
PIN 1
J4
PIN 1
PIN 1
P4
P3
P1
P2
PIN 1
J3
HIGH VOLTAGE SCHEMATIC
115 VOLTS
60 CYCLES
ORANGE
J6
J5
J2
PIN 1
MAIN BOARD
PIN 1
J4
PIN 1
PIN 1
PIN 1
NEUTRAL
WHITE
GRAY
WHITE
P4
BLACK
P3
P1
P2
YELLOW
ORANGE
REF LIGHT
SWITCH
REF (TOP)
DRAWER LIGHT
J3
M
REF FAN
MOTOR
M
M
M
WHITE
L1
ORANGE
Electronic Control System
Integrated
(700-3BASE)
Series
3-13
#3758424 - Revision B - December, 2005
Regulate Refrigerator Zone Temperature (700BR-3)
When the thermistor in the refrigerator compartment reaches high off-set temperature, calling for cooling, the evaporator fan is energized, but the compressor and condenser fan are not allowed to run until the thermistor on the evaporator reaches 38°F (3°C). (See Figure 3-21)
If either drawer is opened while the evaporator fan is operating, the microprocessor will detect the power signal to
the lights and cut power to the fan.
Though compartment air temperatures will fluctuate, LCD displays average temperature.
NOTE: If compartment temperature exceeds either high or low offset (Ex: drawer is left open), temperature display
will change by one
degree per minute.
NOTE: If refrigerator
compartment thermistor is faulty, compressor operation defaults
to 20 minutes ON, 40
minutes OFF cycling,
EE appears in left of
LCD, SERVICE will
flash and Error Code
05 will be logged.
NOTE: If evaporator
thermistor is faulty,
the compressor will
not energize until
zone air temperature
exceeds high offset
by 5°F (3°C). SERVICE flashes and
Error Code 06 is
logged.
NOTE: When in
Sabbath Mode, the
refrigerator compartment thermistor still
controls compressor
operation, except
there is a random 15
to 25 second delay
before the compressor is energized.
Figure 3-21. 700BR-3 Signal Trace - Regulate Refrigerator Zone
1. Thermistor at high off-set
temp. calling for cooling.
2. No Power
to lights.
5. Compressor and
condenser fan
energized.
4. Evap Thermistor
above 38°F (3°C).
3. Evap fan energized.
LOW VOLTAGE SCHEMATIC
J6
J5
J2
PIN 1
MAIN BOARD
PIN 1
J4
PIN 1
PIN 1
P4
P3
P1
P2
PIN 1
J3
DISPLAY
THERMISTOR UPPER DRAWER/REFRIGERATOR
MEMBRANE KEYPAD
DISPLAY BOARD
THERMISTOR EVAPORATOR
PIN 1
PIN 1
J2
J3
ORANGE W/YELLOW STRIPE
BLUE W/YELLOW STRIPE
BLUE W/BLACK STRIPE
BLUE W/BLACK STRIPE
RED
WHITE
BLACK
BLUE
ORANGE
YELLOW
HIGH VOLTAGE SCHEMATIC
ORANGE
J2
PIN 1
MAIN BOARD
ORANGE W/BLACK STRIPE
PIN 1
J6
J4
PIN 1
PIN 1
J5
ORANGE W/BLACK STRIPE
ORANGE
PIN 1
115 VOLTS
60 CYCLES
L1
NEUTRAL
WHITE
RED
WHITE
P4
BLACK
P3
P1
P2
J3
PURPLE
ORANGE
UPPER
LIGHT SWITCH
YELLOW
LOWER
LIGHT SWITCH
UPPER DRAWER LIGHT
M
REF FAN MOTOR
OVERLOAD
PROTECTOR
CONDENSER FAN
LOWER DRAWER LIGHT
COMPRESSOR
M
M
RUNNING
CAPACITOR
COMPRESSOR
STARTING
RELAY
WHITE
(WHEN
USED)
Electronic Control System
Integrated
(700-3BASE)
Series
3-14
#3758424 - Revision B - December, 2005
Monitor and Control “Adaptive Defrost” (700BCI-3, 700BFI-3)
Initially, the compressor will cycle-run for 12 hours, after which the microprocessor sends a signal to the defrost relay
on the control board to close. This supplies power to the defrost heater, drain tube heater and fill tube heater. At
the same time the compressor, condenser fan and evaporator fan are switched off.
With the “Adaptive Defrost” technique, the length of time that the defrost heater stays on to open the defrost terminator bimetal (70°F/21°C), is observed by the microprocessor via the grey w/white stripe wire to J2.
The microprocessor then determines the number of hours before the next defrost. If the heater stays on for a shorter time than specified, the microprocessor increases the next defrost interval. If the heater stays on longer than
specified, the electronic control decreases the next defrost interval. (See Figure 3-13) This is an ongoing process
whereby the defrost time and the defrost interval will vary by unit use.
NOTE: A 5 minute time delay/dwell follows all defrosts, during which the drain tube heater and fill tube heater
remain energized. At the end of the 5 minute dwell, the drain tube heater and fill tube heater are switched off, then
the compressor and condenser fan are energized, but the evaporator fan will not be energized until the evaporator
temperature falls below 35°F (2°C).
NOTE: The minimum defrost interval is 6 hours of compressor run time; the maximum defrost interval is 42 hours of
compressor run time; the maximum defrost duration is 25 minutes plus 5 minute dwell.
NOTE: If the grey w/white wire defrost sensing line is open, defrost operation defaults to 25 minute defrost time and
6 hour build time, and Error Code 22 is logged. If the evaporator thermistor detects an underheat or overheat situation at the same time, Error Codes 20 or 23 will be registered, respectively.
NOTE: During defrost, the display temperature is locked.
Figure 3-22. 700BCI-3 Signal Trace Schematic - Adaptive Defrost
5. Drain and fill tube
heaters remain
on during dwell.
2. Defrost circuit
energized.
3. Terminator
opens at
70°F (21°C)
1. Compressor runs 12
hours, then switched off.
4. Defrost duration
observed, interval
between next
defrost adjusted
HIGH VOLTAGE SCHEMATIC
J2
PIN 1
MAIN BOARD
PIN 1
J6
J4
PIN 1
PIN 1
J5
GRAY W/WHITE STRIPE
PIN 1
115 VOLTS
60 CYCLES
L1
NEUTRAL
WHITE
WHITE
P4
BLACK
P3
P1
BLUE
P2
BLUE
J3
M
COMPRESSOR
M
M
CONDENSER FAN
GRAY W/WHITE STRIPE
GRAY W/WHITE STRIPE
DEFROST
TERMINATOR
FRZ FAN MOTOR
WHITE
M
DEFROST HEATER
25 - 29 OHMS
DRAIN HEATER
1700 - 2100 OHMS
FILL TUBE HEATER
2300 -2900 OHMS
Electronic Control System
Integrated
(700-3BASE)
Series
3-15
#3758424 - Revision B - December, 2005
Monitor and Control Refrigerator Fan-Assisted, Off-Cycle Defrost (700BR-3)
Temperature signals from refrigerator evaporator's thermistor’s are observed by the microprocessor. During off cycle
defrost, if a refrigerator zone temperature reaches high offset (calling for cooling) before evaporator temperature
rises to 38°F (3°C), no power will be supplied the the compressor. But, the the zone evaporator fan will switch ON.
Once the evaporator temperatur reaches 38°F (3°C), normal cooling functions begin. (See Figure 3-23).
NOTE: If refrigerator compartment thermistor is faulty, compressor operation defaults to 20 minutes ON, 40 minutes
OFF cycling, EE appears in left of LCD, SERVICE will flash and Error Code 05 will be logged.
NOTE: If evaporator thermistor is faulty, the compressor will not energize until zone air temperature exceeds high
offset by 5°F (3°C). SERVICE flashes and Error Code 06 is logged.
NOTE: When in
Sabbath Mode, the
refrigerator compartment thermistor still
controls compressor
operation, except
there is a random 15
to 25 second delay
before the compressor is energized.
Figure 3-21. 700BR-3 Signal Trace - Regulate Refrigerator Zone
1. Thermistor at high off-set
temp. calling for cooling.
2. No Power
to lights.
5. compressor and
condenser fan
energized.
4. When Evap
Thermistor rises
above 38°F (3°C),
3. Evap fan energized.
LOW VOLTAGE SCHEMATIC
DISPLAY
THERMISTOR UPPER DRAWER/REFRIGERATOR
HIGH VOLTAGE SCHEMATIC
ORANGE
J2
PIN 1
MAIN BOARD
ORANGE W/BLACK STRIPE
PIN 1
J6
J4
PIN 1
PIN 1
J5
ORANGE W/BLACK STRIPE
ORANGE
PIN 1
P4
P3
P1
P2
J3
MEMBRANE KEYPAD
DISPLAY BOARD
THERMISTOR EVAPORATOR
115 VOLTS
60 CYCLES
L1
WHITE
BLACK
YELLOW
J2
PIN 1
PIN 1
J3
BLUE W/YELLOW STRIPE
BLUE W/BLACK STRIPE
BLUE W/BLACK STRIPE
NEUTRAL
WHITE
RED
PURPLE
ORANGE
UPPER
LIGHT SWITCH
LIGHT SWITCH
UPPER DRAWER LIGHT
LOWER
J2
PIN 1
MAIN BOARD
PIN 1
BLUE
ORANGE
YELLOW
RED
WHITE
BLACK
ORANGE W/YELLOW STRIPE
J6
J4
PIN 1
PIN 1
J5
REF FAN MOTOR
OVERLOAD
PROTECTOR
M
CONDENSER FAN
LOWER DRAWER LIGHT
M
COMPRESSOR
M
RUNNING
CAPACITOR
COMPRESSOR
STARTING
RELAY
WHITE
(WHEN
USED)
P4
P3
P1
P2
PIN 1
J3
Electronic Control System
Integrated
(700-3BASE)
Series
3-16
#3758424 - Revision B - December, 2005
Monitor Compressor Run Duration, Displays If Service is Needed
The microprocessor observes the state of the compressor relay to determine the length of compressor run time (See
Figure 3-22). If the compressor runs 100% (Freezer = 6 hours, Refrigerator = 4 hours), an error code is logged (EC
40), and defrost will be initiated, but SERVICE will not flash.
If several 100% compressor run periods occur, and a drawer was not opened during the last excessive compressor
run period, and the temperature in the zone is not able to fall half way between the set point and the low off-set,
then SERVICE will flash (See Figure 3-23).
NOTE: To clear a flashing SERVICE and error codes, the problem must be corrected, then the Alarm ON/OFF key
pressed for 15 seconds. Failure to clear an error code will cause SERVICE to display constant.
NOTE: If the unit is ever switched OFF then back ON, the compressor will not energize for at least 3 minutes. This
3 minute minimum OFF time is used to protect the compressor and its electricals.
Figure 3-23. Service Flashing if several 100% compressor run periods occurred, a drawer was not opened
during last excessive run period, and temperature is not able to fall half way between set point & low off-set.
Figure 3-22. 700BCI-3 Signal Trace Schematic - Compressor Run
1. Compressor relay closed,
allowing 115 Volts AC to
compressor. This is
observe by microprocessor.
HIGH VOLTAGE SCHEMATIC
J2
PIN 1
MAIN BOARD
PIN 1
J6
J4
PIN 1
PIN 1
J5
PIN 1
115 VOLTS
60 CYCLES
L1
NEUTRAL
WHITE
M
WHITE
P4
BLACK
P3
P1
BLUE
P2
J3
PURPLE
RED
TERMINATOR
OVERLOAD
PROTECTOR
M
CONDENSER FAN
COMPRESSOR
M
M
FRZ FAN MOTOR
RUNNING
CAPACITOR
COMPRESSOR
STARTING
RELAY
WHITE
(WHEN
USED)
SERVICE
FREEZER
WARMERCOLDER
WARMERCOLDER
REFRIGERATOR
ON/OFF
ON/OFF
UNITICE
ON/OFF
Electronic Control System
Integrated
(700-3BASE)
Series
3-17
#3758424 - Revision B - December, 2005
Monitor Icemaker System and Display If Service is Needed
The microprocessor observes the power supplied to the icemaker water valve solenoid. If the solenoid is energized
for more than 15 seconds, power to the icemaker system is disabled for 24 hours and an error code is logged (EC
30). (See Figure 3-24) If this happens five consecutive times, ICE and SERVICE on the LCD will flash and the ICE
ON/OFF key will be disabled (See Figure 3-25).
NOTE: To clear the ICE and SERVICE error indicators, and reactivate the ICE ON/OFF key, the problem must be
corrected, then the unit must be switched OFF and back ON, and the Alarm key must be pressed for 15 seconds to
clear the Error Code.
NOTE: To allow ice to freeze fully and reduce effects of low water pressure, power to the icemaker system is interrupted for 45 minutes after each ice harvest. This can be bypassed for service purposes by switching the icemaker
system OFF, then back ON by pressing the ICE ON/OFF key.
NOTE: When in Sabbath Mode, icemaker system is disabled. Sabbath Mode will be covered later.
Figure 3-25. ICE & SERVICE Flashing if solenoid energized 15 seconds, every 24 hours, 5 consecutive times
Figure 3-24. 700BCI-3 Signal Trace Schematic - Icemaker Operation and Solenoid Monitoring
1. 115 Volts AC
to solenoid
monitored.
2. If solenoid
energized
more then
15 seconds,
power to IM
system
interrupted
for 24 hours.
HIGH VOLTAGE SCHEMATIC
TAN
J2
PIN 1
MAIN BOARD
PIN 1
J6
J4
PIN 1
PIN 1
J5
TAN
PIN 1
115 VOLTS
60 CYCLES
L1
NEUTRAL
WHITE
WHITE
P4
BLACK
P3
P1
P2
J3
PINK
ICEMAKER
SWITCH
THERMAL
FUSE
ICEMAKER
(OPTIONAL)
M
M
M
M
ICEMAKER
TAN
VALVE
WHITE
SERVICE
ICE
FREEZER
WARMERCOLDER
WARMERCOLDER
REFRIGERATOR
ON/OFF
ON/OFF
UNITICE
ON/OFF
Electronic Control System
Integrated
(700-3BASE)
Series
3-18
#3758424 - Revision B - December, 2005
POSSIBLE ERROR INDICATORS
The diagrams on this page illustration what a customers may see on LCD if a problem/error exists with the unit.
NOTE: To clear indicators and error codes, problem must be corrected then press bell ON/OFF key for 15 seconds.
Figure 3-27.
“EE” Displayed at Right & “SERVICE” Flashing = Refrigerator Compartment Thermistor (or its Wiring) Fault
Figure 3-26.
“EE” Displayed at Left & “SERVICE” Flashing = Freezer Compartment Thermistor (or its Wiring) Fault
Figure 3-29.
Service Flashing = Several 100% run periods, a drawer was not open during last 100% run period, and zone
temperature not able to fall half way between set point and low off-set.
Figure 3-30.
“ICE” and “SERVICE” Flashing = Solenoid Energized 15 Seconds, Every 24 Hours, 5 Consecutive Times
Figure 3-31.
“SERVICE” Steady, not Flashing = Error Codes Observed in Diagnostic Mode, but not Cleared
Figure 3-28.
Service Flashing = Evaporator Thermistor (or its Wiring) Fault
Figure 3-32.
“- - ” Double Dashes Displayed = Model Configuration was not Performed
SERVICE
FREEZER
WARMERCOLDER
WARMERCOLDER
REFRIGERATOR
ON/OFF
ON/OFF
UNITICE
ON/OFF
SERVICE
FREEZER
WARMERCOLDER
WARMERCOLDER
REFRIGERATOR
ON/OFF
ON/OFF
UNITICE
ON/OFF
SERVICE
FREEZER
WARMERCOLDER
WARMERCOLDER
REFRIGERATOR
ON/OFF
ON/OFF
UNITICE
ON/OFF
SERVICE
FREEZER
WARMERCOLDER
WARMERCOLDER
REFRIGERATOR
ON/OFF
ON/OFF
UNITICE
ON/OFF
ICE
SERVICE
FREEZER
WARMERCOLDER
WARMERCOLDER
REFRIGERATOR
ON/OFF
ON/OFF
UNITICE
ON/OFF
SERVICE
FREEZER
WARMERCOLDER
WARMERCOLDER
REFRIGERATOR
ON/OFF
ON/OFF
UNITICE
ON/OFF
FREEZER
WARMERCOLDER
WARMERCOLDER
REFRIGERATOR
ON/OFF
ON/OFF
UNITICE
ON/OFF
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