Sub-Zero 700-2 Series, 700TR-2, 700TF-2, Integrated Series, 700TFI-2 Service Manual

...

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subzero.com 800.222.7820

700

Service Manual

General Information 2 Installation Information 7 Controls & Operation 10 Sealed System 54 Air Flow & Fan Blade Spacing 62 Icemaker Information 64 Component Access & Removal 68 Troubleshooting Guide 107 Technical Data 141 Wiring Diagrams 147

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General Information

Integrated (

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#3756780 - Revision D - July, 2005

INTRODUCTION

This Sub-Zero Intigrated (700-2) Series Technical Service Manual (Job Aid Part #3756780) has been compiled to provide the most recent information on safety, installation, set-up, design, operation, features, troubleshooting, wiring diagrams, and repair procedures for the Intigrated (700-2) Series units. This information will enable the service technician to troubleshoot and diagnose malfunctions, perform necessary repairs, and return an Intigrated (700-2) Series unit to proper operational status.

The service technician should read the complete instructions contained in thismanual before initiating any repairs.

IMPORTANT SAFETY INFORMATION

Below are 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 of 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.

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, and/or product damage, and/or property damage.

In addition, please pay attention to the signal word “NOTE”, which highlights information that is especially important for the topic being covered.

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.

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

without the express written consent of Sub-Zero Freezer Company, Inc.

TECHNICAL ASSISTANCE

If you should have any questions regarding the 700 Series 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

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WARRANTY INFORMATION

This page contains a summary of the 2, 5 & 12 Year Warranty that is supplied with every 700-2 Series unit.

This is followed by a summary of 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)

700TCI 2 0000000

7.0

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.)

Jul 2000

Model Number

Serial Number

Manufacture Date

Refrigerant Charge

Total Amps Refrigerant Type

MODEL

FREEZER CO., INC.

REFRIGERATOR

PRODUCT SERVICE 1-800-222-7820

FREEZER

LISTED HOUSEHOLD

REFRIGERATOR OR FREEZER

MADISON, WI

SERIAL NUMBER

TOTAL AMPS

115Vac, 60Hz, 1 Phase

REFRIGERANT

CUS

LISTED

776N

Date Code

ALSO VERIFIED IN ACCORDANCE WITH ENERGY STANDARD

CAN/CSA-C300-91

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MODEL DESCRIPTIONS

The following pages briefly describe the models covered in this manual. Though there are models with and without icemaker, for the purposes of this manual, only the refrigerator models and the models with icemakers we will addressed in the succeeding sections.

Model 700TC-2 (Figure 1-2)

700 Series

Tall Combo

(Combination Refrigerator / Freezer with Two Temperature Zones - Upper Refrigerator over Two Drawer Freezer)

2nd Design Build

(Unit is 80” H x 27” W x 24” D)

Model 700TCI-2 (Figure 1-2)

700 Series

Tall Combo

(Combination Refrigerator / Freezer with Two Temperature Zones - Upper Refrigerator over Two Drawer Freezer)

Ice maker Included

2nd Design Build

(Unit is 80” H x 27” W x 24” D)

Figure 1-2. Model 700TC-2 & 700TCI-2

Upper Refrigerator

Two Drawer Freezer

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Model 700TR-2 (Figure 1-3)

700 Series

Tall Refrigerator

(All Refrigerator with Two Temperature Zones - Upper Refrigerator over Two Drawer Refrigerator)

2nd Design Build

(Unit is 80” H x 27” W x 24” D)

Figure 1-3. Model 700TR-2

Upper Refrigerator

Two Drawer Refrigerator

Model 700TF-2 (Figure 1-4)

NOTE: This model is replaced by the 700TF-2V as of serial #1898164 (see following page).

700 Series

Tall Freezer

(All Freezer with One Temperature Zone - Upper Freezer Section over Two Drawer Freezer Section)

2nd Design Build

(Unit is 80” H x 27” W x 24” D)

Model 700TFI-2 (Figure 1-4)

NOTE: This model is replaced by the 700TFI-2V as of serial #1898164 (see following page).

700 Series

Tall Freezer

(All Freezer with One Temperature Zone - Upper Freezer Section over Two Drawer Freezer Section)

Ice maker Included

2nd Design Build

(Unit is 80” H x 27” W x 24” D)

Figure 1-4. Model 700TF-2 & 700TFI-2

Upper Freezer Section

Two Drawer Freezer Section

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Model 700TF-2V (Figure 1-5)

NOTE: This model replaced the 700TF-2 as of serial #1898164.

700 Series

Tall Freezer

(All Freezer with One Temperature Zone - Upper Freezer Section over Two Drawer Freezer Section)

2nd Design Build

Variable Speed Compressor

(Unit is 80” H x 27” W x 24” D)

Model 700TFI-2V (Figure 1-5)

NOTE: This model replaced the 700TFI-2 as of serial #1898164.

700 Series

Tall Freezer

(All Freezer with One Temperature Zone - Upper Freezer Section over Two Drawer Freezer Section)

Ice maker Included

2nd Design Build

Variable Speed Compressor

(Unit is 80” H x 27” W x 24” D)

Figure 1-5. Model 700TF-2V & 700TFI-2V

Upper Freezer Section

Two Drawer Freezer Section

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Model 700BR-2 (Figure 1-6)

700 Series

Base Refrigerator

(All Refrigerator with Two Temperature Zones - Upper Drawer and Lower Drawer)

2nd Design Build

(Unit is 80” H x 27” W x 24” D)

Figure 1-6. Model 700BR-2

Upper Refrigerator Zone

Model 700BF-2 (Figure 1-7)

700 Series

Base Freezer

(All Freezer with One Temperature Zone for Both Drawers)

2nd Build Design

(Unit is 34” H x 27” W x 24” D)

Model 700BFI-2 (Figure 1-7)

700 Series

Base Freezer

(All Freezer with One Temperature Zone for Both Drawers)

Ice maker Included

2nd Build Design

(Unit is 34” H x 27” W x 24” D)

Lower Refrigerator Zone

Freezer Drawers

Figure 1-7. Model 700BF-2 & 700BFI-2

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Integrated (

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#3756780 - Revision D - July, 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, doors and 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 the unit has already been anchored to the cabinets, the side molding strips must be removed and the anchor screws must be extracted from the unit to cabinet brackets before leveling (See

Figure 2-2). These components must be reinstalled

after leveling.

Figure 2-2. Side Molding & Bracket

Figure 2-1. Kickplate/Grille Removal

Figure 2-3. Adjusting Front Levelers

To level the unit, turn the front leveling legs counterclockwise to raise the front or clockwise to lower it. To assist in turning the front leveling legs up or down, use a standard straight-blade screwdriver and place it in the foot of the front leg, then rotate the leveler foot in the desired direction (See Figure 2-3).

Kickplate / Grille

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Figure 2-4. Adjusting Rear Levelers

Figure 2-5. 90° Door Stop Cam

Screwdriver

90° Stop Cam

The rear levelers are adjusted from the front of the base by turning the Phillips head adjusting screw. The long adjusting screw reaches all the way to the rear leveler assembly. Turn the screw clockwise to raise the rear or counterclockwise to lower it (See Figure 2-4).

NOTE: The rear leveling legs will only move 1/16” for

every 18 revolutions of the Phillips head screw. Do not over torque. Use the 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

The doors and drawers on 700-2 Series units are nonadjustable. Instead, the door and/or drawer panels must be adjusted if there is an alignment problem. Refer to the Installation Manual and/or installation video for panel installation and adjustment.

NOTE: The unit must be level before attempting to

adjust the door and drawer panels.

NOTE: If the door has problems closing, see Tall Unit

Door Hinge Operation Test Procedures and Corrections at the end of the Troubleshooting Guide.

Door Stop Adjustment

700-2 Series tall units have a 90° door stop cam built into the hinge system. The 90° door stop cam is located in the center portion of each hinge. To adjust it, use a standard straight-blade screwdriver to rotate the cam until it reaches the stop point (See Figure 2-5).

NOTE: You must

make this adjustment at both bottom

and top hinge.

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Integrated (

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Dual Unit Installations

• If two Tall units are installed side by side and are 2” or less apart, part #TTDUAL should be utilized.

(See Figure 2-6)

• If two Base units are installed side by side and are 2” or less apart, part #BBDUAL should be utilized

• If a Tall unit is installed next to a Base unit and they are 2” or less apart, part #BBDUAL should be utilized.

Complete installation instructions are supplied with the #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 2-6. Dual Unit Heater (#TTDUAL Shown)

Apply heater to left side of right hand unit

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SECTION 3

ELECTRONIC CONTROL

SYSTEM INFORMATION

NOTE: The Electronic Control System used in an

Integrated (700-2) Tall Unit differs from the Electronic Control System used in a Integrated (700-2) Base

Unit. For this reason, Section 3 is divided into two parts. The first part pertains to the Control System in T

all Units. The sec-

ond part pertains to the Control System in Base Units.

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erm/Component Definition / Description

Control Board …………………………..The printed-circuit board (PC Board) contains the microprocessor, relays and

electrical connections which control and monitor all functions and operations of the unit.

Microprocessor ………………………... An electrical component on the control board which receives electrical signals

from other components, processes that information, then sends an electrical signal to the relays on the board to open or close, and other electronic components in the unit to switch on or off.

Relay …………………………………… The electrical components on the control board which switch other compo-

nents in the unit ON and OFF when instructed to do so by the microprocessor.

LCD (Liquid Crystal Display) ……...... That part of the control board seen at the control panel which displays com-

partment temperatures, service annunciators, etc. . .

Control Panel Assembly ………………The information input and read-out area of the electronic control system,

located at the top of the upper Compartment.

Membrane Switch …………………….. An integral part of the control panel assembly, which consists of the function

keys used for all input operations to the electronic control system.

Keys (Function Keys) ………………… The buttons on the Membrane switch used for input operations. (The keys

are: UNIT ON/OFF, ALARM ON/OFF, ICE ON/OFF, WARMER, COLDER)

Annunciators …………………………... The words and numbers that are displayed at the control panel assembly.

(Example: Temperature displays, alarm bell indicator, SERVICE indicator, and ICE system indicator)

Display Units…………………………... The temperatures displayed may be in fahrenheit units of measure (°F) or in

celsius units of measure (°C). A series of key strokes allows this to be changed back and forth.

Set-Point ……………………………….. The desired compartment temperature, established by pressing the COLDER

or WARMER keys.

High Offset (Cut-in)………………….....As the compartment air temperature cycles up and down, this is the maxi-

mum compartment temperature that the electronic control system will allow before calling for cooling.

Low Offset (Cut-out)…………………... As the compartment air temperature cycles up and down, this is the minimum

compartment air temperature that the electronic control system will allow before interrupting cooling.

Thermistor (Temperature Sensor) ….. A resistor with which resistance changes as the temperature around it

changes. For electronic control system purposes, the microprocessor measures this resistance and displays it as a temperature reading at the LCD.

ELECTRONIC CONTROL TERMINOLOGY & COMPONENT DESCRIPTIONS

All Integrated 700-2 Series units utilize an electronic control system. The electronic control system monitors, regulates and controls a variety of functions. The electronic control system also displays temperature readings, ice maker system operation, possible problems with the unit and door ajar alarm status. The table below defines some basic electronic control system terminology and describes some of the electronic control system components. An understanding of the following information is needed in order to comprehend the input operations and functions of the electronic control system.

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BASIC 700- 2 TALL UNIT ELECTRONIC CONTROL SYSTEM

Input operations for the electronic control system are performed at the control panel (located at the top of the upper compartment), with monitoring, regulating and controlling functions taking place at the control board (located directly behind the control panel). Temperatures and possible problems with the unit are illuminated in the control panel at the LCD. This page illustrates a basic 700 Series electronic control system (Model 700TCI-2 used, See Figure 3-1). The entire electronic control system is described in greater detail on the following pages.

Figure 3-1. Basic 700TCI-2 Electronic Control System Diagram

ALARM BELL

COND

FAN

FILL TUBE

HEATER

RRRR

RR R

FRE CMPRTMNT THERMISTOR

CONTROL BOARD

LCD

FRE EVAP THERMISTOR

DEFROST HEATER

115 VOLTS

60 CYCLES

MICROPROCESSOR

CONTROL PANEL / MEMBRANE SWITCH

FREEZER

BOARD CONFIGURING RESISTORS

REF EVAP

THERMISTOR

REF CMPRTMNT

THERMISTOR

NEUT

WARMERCOLDER

DEFROST MONITOR LINE

WARMERCOLDER

REFRIGERATOR

LIGHT

SWITCH

SOL. MONITOR LINE

DEFROST TERMINA T OR

ICE

ON/OFF

DOOR AJAR MONITOR LINE

WATER SOLENOID

ICEMAKER

LIGHTS

ON/OFF

UNIT

REFRIG COMP

FREEZER FREEZER COMP

EVAP FAN

REFRIG EVAP FAN

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Figure 3-2. 700-2 Tall Unit Control Board Layout

Figure 3-3. 700-2 Tall Unit Control Board Summary Table (700TC/I-2 Summary Table Shown)

700-2 TALL UNIT CONTROL BOARD LAYOUT AND SUMMARY TABLE

The electrical connection points on the 700-2 tall unit control board are labeled alphanumerically. These labels correspond with the alphanumeric control board summary table, located on all 700 Series wiring diagrams. By referencing the summary table, it is possible to identify which components are connected at which connection points on the control board. Below is a layout diagram of the control board, and a copy of a summary table. (See Figures 3-2

and 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.

LCD (DISPLAY)

CIRCUIT

DEF HTR

E10

J7-1 C FAN J7-2 J7-3

J7-4 J7-5 J7-6 J7-7 J7-8

J4-1

J4-2 J4-3 J4-4 J4-5

LOW VOLTAGE THERMISTOR CIRCUITS

J1-1 J1-2

J1-3 J1-4

J1-5

J1-6

J1-7 J1-8

FCOMP

RCOMP

E FAN

IACC

LITES

ICE

NEU F DR R DR

EVAP FRZ EVAP FRZ EVAP REF EVAP REF

REF

FRZ

DESCRIPTION 120 VOLT CIRCUITS

DEFROST HEATER FRZ COMPRESSOR

POWER IN

REF COMPRESSOR

CONDENSER FAN NOT USED ICE MAKER ACC (FILL TUBE) LIGHTS ICE MAKER POWERS ICE MAKER NOT USED NOT USED(NO PIN) NEUTRAL DRAWER LIGHTS SENSE DOOR LIGHTS SENSE

NOT USED(NO PIN) DEF SENSOR ICE MAKER VALVE SENSOR

FRZ EVAP

FRZ EVAP REF EVAP REF EVAP REF COMPARTMENT

REF COMPARTMENT

FRZ COMPARTMENT

PIN 1

BOARD CONFIGURING

RESISTORS

E7 E10 E6E2

PIN 1

CONTROL BOARD SUMMARY

FUNCTION COLOR

POWERS DEFROST CIRCUIT POWERS FRZ COMPRESSOR (DRAWERS) POWER INTO BOARD POWERS REF COMPRESSOR (DOOR) POWERS CONDENSER FAN

POWERS FILL TUBE HEATER AND ACCESSORIES POWERS LIGHTS

NEUTRAL INTO BOARD SENSES IF EITHER DRAWER OPEN SENSES IF DOOR OPEN

SENSES WHEN DEF HEATER SHUTS OFF SENSES WATER VALVE ACTIVATION

SENSES FRZ EVAP TEMP (DRAWERS) SENSES FRZ EVAP TEMP (DRAWERS) SENSES REF EVAP TEMP SENSES REF EVAP TEMP SENSES REF CABINET TEMP SENSES REF CABINET TEMP SENSES FRZ CABINET TEMP (DRAWERS) SENSES FRZ CABINET TEMP (DRAWERS)

PIN 1

BLUE

PURPLE

BLACK

GRAY

WHITE/RED

WHITE/BLUE

YELLOW

PINK

WHITE ORANGE ORANGE

GRAY/WHITE

TAN

ORANGE/RED BLUE/RED ORANGE/YEL BLUE/YELLOW BLUE/WHITE BLUE/WHITE BLUE/BLACK BLUE/BLACK

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UNIT

ICE

WARMER

COLDER

REFRIGERATOR

ON/OFF

WARMER

COLDER

FREEZER

ICE

SERVICE

OFF

700-2 TALL UNIT CONTROL PANEL LAYOUT

Please note that in the first part of this section, an illustration of the 700TC/I-2 control panel is used most often.

(See Figure 3-4)

Figure 3-4. 700-2 Tall Unit Control Panel Layout (700TC/I-2 Control Panel Shown)

WHEN IN OFF MODE, 115 VOLTS AC IS STILL PRESENT AT CONTROL BOARD!

UNIT

ICE

WARMER

COLDER

REFRIGERATOR

ON/OFF

WARMER

COLDER

FREEZER

Figure 3-5. 700-2 Tall Unit ON/OFF, Press UNIT ON/OFF Key

BASIC 700-2 TALL UNIT ELECTRONIC CONTROL INPUT OPERATIONS

Following are illustrations which show the basic input operations performed at the 700-2 tall unit control panel. Switching the unit ON and OFF, adjusting the set-point (temperature adjustments), switching the ice maker system ON and OFF, and enabling and disabling the door ajar alarm feature will be explained. Please note that the 700TC/I-

2 control panel is used for most illustrations of the control panel, and in most cases Fahrenheit readings are shown.

Unit ON/OFF

All Integrated 700-2 Series units are shipped in the OFF Mode and when power is supplied to the unit, a trace of the word “OFF” is visible on the LCD. By pressing and releasing the UNIT ON/OFF key, (See Figure 3-5.) power is allowed past the control board to the rest of the unit. This will be indicated by the unit lights and LCD at the control panel illuminating.

NOTE: Whenever the unit is switched off using the the UNIT ON/OFF key, a trace of the word “OFF” will be visible

on the LCD as long as there is power to the unit.

UNIT

ON/OFF

KEY

DOOR / DRAWER

AJAR ALARM ON/OFF

KEY

ICEMAKER SYSTEM

ON/OFF

KEY

(Not present on 700TR-2)

REFRIGERATOR

SET-POINT

ADJUSTMENT

KEYS

(Upper door section on 700 TR-2)

(Not present on 700TF/I-2 or 700TF/I-2V)

FREEZER

SET-POINT

ADJUSTMENT

KEYS

(Lower Drawer section on 700TR-2)

LCD

Liquid

Crystal

Display

SERVICE

ICE

Jake Dog was here

OFF

FREEZER

COLDER

WARMER

COLDER

WARMER

REFRIGERATOR

ICE

ON/OFF

UNIT

FREEZER

COLDER

WARMER

COLDER

WARMER

REFRIGERATOR

ICE

ON/OFF

UNIT

ON/OFF

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Adjusting Set-Point (Temperature Adjustment)

To adjust the set-points, press the appropriate compartment WARMER or COLDER key on the control panel in multi

ple key strokes

until the desired set-point is achieved. One key stroke equals a one degree (Fahrenheit or Celsius)

change. (See Figure 3-6)

NOTE: Temperature ranges are -5°F (-21°C) to +5°F (-15°C) in freezer compartment, with an initial set-point of

0°F (-18°C), and +34°F (+1°C) to +45°F (+7°C) in refrigerator compartment, with an initial set-point of +38°F (+3°C).

NOTE: When checking set-points, remember that the initial key stroke of the WARMER or COLDER key will change

the previous set-point by one degree (Fahrenheit or Celsius).

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 compartment temperature will be displayed. As the compartment temperature changes, the temperature displayed on the LCD will change, by no more than one degree per minute.

UNIT

ICE

WARMER

COLDER

REFRIGERATOR

ON/OFF

WARMER

COLDER

FREEZER

Figure 3-6. Adjusting the Set-Point - Press WARMER or COLDER Key In Multiple Key Strokes

Icemaker System ON/OFF

All Integrated 700-2 Series units are shipped with the icemaker system switched of

f. By pressing and releasing the ICE ON/OFF key on the control panel, power is allowed to the icemaker system, and “ICE” is displayed on the LCD.

(See Figure 3-7) To deactivate the icemaker system, press and release the ICE ON/OFF key again and the “ICE”

annunciator will disappear from the LCD indicating the icemaker system is of

NOTE: When the unit is in “Sabbath Mode,” the icemaker system is de-energized. Sabbath Mode will be explained

in UNIQUE ELECTRONIC CONTROL SYSTEM INPUT OPERATIONS.

Figure 3-7. Icemaker System ON/OFF - Press ICE ON/OFF Key

ICE

UNIT

ICE

WARMER

COLDER

REFRIGERATOR

ON/OFF

WARMER

COLDER

FREEZER

Door Ajar Alarm Bell ON/OFF

All Integrated 700-2 Series units are equipped with a door ajar alarm feature. When activated the alarm will alert a customer if a door or drawer is left or stuck open. To enable the door ajar alarm feature, press and release the door ajar alarm bell ON/OFF key on the control panel. A bell annunciator will illuminate on the LCD indicating the alarm feature is active (See Figure 3-8). Now, if a door or drawer is open for 30 seconds (See “NOTE” in Figure 3-8), the bell annunciator will flash and the audible alarm will beep. To disable the door ajar alarm, simply press the door ajar alarm bell ON/OFF key and the bell annunciator on the LCD will disappear, indicating the alarm feature is of

Figure 3-8. Door Ajar Alarm ON/OFF, Press Alarm Bell ON/OFF Key

UNIT

ICE

WARMER

COLDER

REFRIGERATOR

ON/OFF

WARMER

COLDER

FREEZER

COLDER

WARMER

COLDER

WARMER

REFRIGERATOR

ICE

ON/OFF

UNIT

ON/OFF

ICE

FREEZER

COLDER

WARMER

COLDER

WARMER

REFRIGERATOR

ICE

ON/OFF

UNIT

ON/OFF

FREEZER

COLDER

WARMER

COLDER

WARMER

REFRIGERATOR

ICE

ON/OFF

UNIT

ON/OFF

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#3756780 - Revision D - July, 2005

FUNCTIONS OF 700 TALL UNIT ELECTRONIC CONTROL SYSTEM

The following few pages explain the monitoring, regulating and controlling functions of the electronic control system. Signal trace schematic illustrations for the model 700TC/I-2 are used to demonstrate current flow for the function being explained.

NOTE: Only normal operating electronic control functions are described along with problems which could cause

error annunciators. All possible malfunctions are addressed in the Troubleshooting Guide.

Supply Power to the Lighting System

115 Volts are supplied to the lighting system through the control board when the unit is switched on

by pressing the

UNIT ON/OFF key. (See Figure 3-9.)

NOTE: Disabling the lighting system (Sabbath Mode) is covered in Unique Electronic Control Input Operations.

Figure 3-9. 700TC/I-2 Signal Trace Schematic of Lighting System

115 Volts are supplied through J7 to lighting system unless unit is switched OFF or is in Sabbath Mode

NOTE: Door Ajar Sense Lines

HIGH VOLTAGE

115 VOLTS

BLACK

WHITE

60 CYCLES

NEUT

WHITE

E2 E7 E10 E6

ORANGE ORANGE

REFRIGERATOR

LIGHT SWITCH

ORANGE

FREEZER

LIGHT

SWITCHES

ORANGE

LIGHT

TERMINATOR

REFRIGERATOR

LIGHTS

FREEZER

LIGHTS

Page 18

Electronic Control

Integrated (

700-

2) Series

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#3756780 - Revision D - July, 2005

Monitor, Regulate and Display Compartment Temperatures (700TC/I-2, 700TR-2 and 700TF/I-2)

In the models 700TC/I-2, 700TR-2 and 700TF/I-2, the temperature signal from the thermistor in the refrigerator and/or freezer compartment is 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 3-10). When the compartment temperature reaches high offset, the microprocessor supplies power to the compressor and evaporator fan (See Figure 3-11). As the compressor and evaporator fan run, the compartment temperature drops. When the compartment temperature reaches low offset, the microprocessor interrupts power to the compressor and evaporator fan, cycling them off.

NOTE: If the average compartment temperature changes, the temperature displayed on the LCD will change by one

degree per minute.

Figure 3-10. Average Compartment Temperature Displayed

UNIT

ICE

WARMER

COLDER

REFRIGERATOR

ON/OFF

WARMER

COLDER

FREEZER

Compartments

calling for cooling

(Temp. above high offset)

Compressors and evaporator fans energized

Figure 3-11. 700TC/I-2 Signal Trace Schematic (High & Low Voltage) of Regulating Temperatures

HIGH VOLTAGE

E2 E7 E10 E6

WARMER

FREEZER

COLDER

WARMER

COLDER

LOW VOLTAGE

DISPLAY

PIN 1

E2 E6E10E7

PIN 1

PIN 1PIN 1

BLACK

WHITE

GRAY

115 VOLTS

60 CYCLES

PURPLE

PIN 1

NEUT

MEMBRANE SWITCH

BLUE W/WHITE STRIPE BLUE W/WHITE STRIPE

BLUE W/BLACK STRIPE BLUE W/BLACK STRIPE

WHITE

REFRIGERATOR

FAN SWITCH

REFRIGERATOR

COMPRESSOR

REFRIGERATOR

OVERLOAD

PROTECTOR

FREEZER

OVERLOAD

PROTECTOR

FREEZER

PURPLE RED

SWITCHES

COMPRESSOR

FAN

REF CAB THERMISTOR

FZR CAB THERMISTOR

RED

FREEZER

REFRIGERATOR

FAN MOTOR

RUNNING

CAPACITOR

(WHEN USED)

STARTING

RELAY

RUNNING

CAPACITOR

(WHEN USED)

STARTING

RELAY

FREEZER

FAN MOTOR

ICE

ON/OFF

UNIT

ON/OFF

Page 19

Electronic Control

Integrated (

700-

2) Series

3-9

#3756780 - Revision D - July, 2005

Control Variable Speed Compressor (700TF/I-2V)

Like other tall units, the temperature signal from the thermistor in a 700TF/I-2V freezer compartment is monitored by the microprocessor and then displayed on the LCD, and when cooling is called for, the evaporator fan and condenser fan are energized. But, in a model 700TF/I-2V an additional component, the compressor controller, is used to control the variable speed compressor. How this works is, the temperature difference between the compartment thermistor and the set-point is monitored by the microprocessor to determine the appropriate speed signal which is then sent via a low voltage line to the compressor controller. The compressor controller supplies a 230 volt AC, 3phase, 50 - 150 Hz signal, based on the speed signal from the microprocessor, to the compressor. This signal causes the compressor to run at varying speeds. (See Figure 3-12) Speed commands will vary at 0, 1600, 1700, 1800, 2100, 2200, 2400, 2700, 3600 and 4000 RPM, depending on compartment temperature and set-point.

NOTE: In the model 700TF/I-2V, the compressor, evaporator fan and condenser fan will run a great majority of the

time. This is normal. These components will only cycle off during defrost and may also cycle off for short periods of time if the ambient temperature is low enough.

Figure 3-12. 700TF/I-2V Signal Trace Schematic of Variable Speed Compressor Operation

VOLTAGE EXCEEDING 200 VOLTS MAY BE PRESENT AT COMPRESSOR & COMPRESSOR CONTROLLER!

1. Compartment temperature monitored by microprocessor

3. Low voltage speed signal sent from microprocessor to controller, based on difference between compartment temperature and set-point

4. Controller supplies

230 volt AC, 3-phase, 50 - 150 Hz signal (based on the speed signal from microprocessor), to compressor.

2. 115 Volts AC supplied to controller, evaporator fan, and condenser fan when cooling is required.

NOTE: con-

troller also sends signal back to microprocessor indicating compressor speed status.

HIGH VOLTAGE

E2 E7 E10 E6

LOW VOLTAGE

V SPEED

CONTROL

BOX

PINK W/BLACK PINK W/RED YELLOW W/RED YELLOW W/BLACK

115 VOLTS 60 CYCLES

BLACK

WHITE

PURPLE

DISPLAY

PIN 1

E2 E6E10E7

PIN 1

PIN 1 PIN 1

NEUT

PIN 1

CONDENSER

FAN MOTOR

WHITE

MEMBRANE SWITCH

ORANGE W/RED STRIPE BLUE W/RED STRIPE

BLUE W/BLACK STRIPE BLUE W/BLACK STRIPE

FRZ EVAP THERMISTOR

FRZ CAB THERMISTOR

VSPEED

CONTROL

FREEZER

FAN

PURPLE RED

SWITCHES

BOX

BROWN BLACK

COMPRESSOR

FAN MOTOR

LT. BLUE

FREEZER

Page 20

Electronic Control

Integrated (

700-

2) Series

3-10

#3756780 - Revision D - July, 2005

Control Condenser Fan Run

The microprocessor senses the 115 volt output supplied to both compressors. If either compressor is running, a signal is sent to the condenser fan relay on the control board to close, supplying power to the condenser fan. If both compressors are off, the condenser fan is off. (See Figure 3-13)

NOTE: There is only one compressor on the model 700TF/I-2 and 700TF/I-2V. The condenser fan cycles with this sin-

gle compressor. In the model 700TF/I-2V, the condenser fan along with the compressor and evaporator fan will only cycle off during defrost and may also cycle off for short periods of time if the ambient temperature is low enough.

Figure 3-13. 700TC/I-2 Signal Trace Schematic (High Voltage) of Condenser Fan Operation

Power supplied to condenser fan motor if one or both compressors are running

HIGH VOLTAGE

115 VOLTS

E2 E7 E10 E6

60 CYCLES

BLACK

WHITE

GRAY

PURPLE

NEUT

WHITE

REFRIGERATOR

FAN SWITCH

REFRIGERATOR

COMPRESSOR

REFRIGERATOR

OVERLOAD

PROTECTOR

FREEZER

OVERLOAD

PROTECTOR

FREEZER

FAN

PURPLE RED

SWITCHES

FREEZER

COMPRESSOR

RED

REFRIGERATOR

FAN MOTOR

RUNNING

CAPACITOR

(WHEN USED)

STARTING

RELAY

RUNNING

CAPACITOR

(WHEN USED)

STARTING

RELAY

FREEZER

FAN MOTOR

WHITE/RED

CONDENSER

FAN MOTOR

Page 21

Electronic Control

Integrated (

700-

2) Series

3-11

#3756780 - Revision D - July, 2005

Figure 3-15. 700TC/I-2 Signal Trace Schematic (High Voltage) of Compressor Electrical System

Figure 3-16. SERVICE Flashing Possibly Because of Several Excessive Compressor Run Periods Occurring

UNIT

ICE

WARMER

COLDER

REFRIGERATOR

ON/OFF

WARMER

COLDER

FREEZER

SERVICE

length of compressor

run time is monitored

by microprocessor.

Monitor Compressor Run Duration, Displays If Service may be Needed (700TC/I-2, 700TR-2 and 700TF/I-2)

The microprocessor in the models 700TC/I-2, 700TR-2 and 700TF/I-2 senses the 115 volt output supplied to the compressor(s), monitoring the length of compressor run time (See Figure 3-15). If several excessive compressor run periods occur, a signal is sent to the SERVICE annunciator on the LCD to flash (See Figure 3-16).

NOTE: A flashing SERVICE annunciator can indicate excessive compressor run or a faulty refrigerator evaporator

thermistor. Diagnostic Mode (covered later in this section) should be initiated to narrow the search for possibilities. This is also covered in the Troubleshooting Guide section of this manual.

NOTE: To clear a flashing SERVICE error annunciator, the problem must be corrected, then the unit must be

switched OFF and back ON.

NOTE: If the unit is ever switched OFF then back ON, the compressors will not energize for at least three minutes.

This three minute minimum OFF time is used to protect the compressor and its electricals.

HIGH VOLTAGE

115 VOLTS

E2 E7 E10 E6

60 CYCLES

BLACK

WHITE

GRAY

PURPLE

NEUT

WHITE

REFRIGERATOR

FAN SWITCH

REFRIGERATOR

COMPRESSOR

REFRIGERATOR

OVERLOAD

PROTECTOR

FREEZER

OVERLOAD

PROTECTOR

FREEZER

FAN

PURPLE RED

SWITCHES

FREEZER

COMPRESSOR

RED

REFRIGERATOR

FAN MOTOR

RUNNING

CAPACITOR

(WHEN USED)

STARTING

RELAY

RUNNING

CAPACITOR

(WHEN USED)

STARTING

RELAY

FREEZER

FAN MOTOR

SERVICE

FREEZER

COLDER

WARMER

COLDER

WARMER

REFRIGERATOR

ICE

ON/OFF

UNIT

ON/OFF

Page 22

Electronic Control

Integrated (

700-

2) Series

3-12

#3756780 - Revision D - July, 2005

Monitor and Control “Adaptive Defrost” of Freezer Evaporator

Initially the freezer compressor will cycle-run for twelve hours (twenty-four hours in model 700TF/I-2V), after which the microprocessor sends the signal to the defrost relay on the control board to close. This supplies power to the defrost heater, and the compressor is switched off (See Figure 3-15). With the “Adaptive Defrost” technique, the length of time that the heater actually stays on to defrost the evaporator and satisfy the defrost terminator is observed by the microprocessor. 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. This is an ongoing process whereby the defrost time and the defrost interval will vary by unit use.

NOTE: A five minute time delay/dwell follows all defrosts, except in the model 700TF/I-2V where the delay/dwell is

ten minutes. The drain trough heater is energized during defrost and the delay/dwell period.

NOTE: The minimum defrost interval is six hours; The maximum defrost interval is eighty hours; the maximum

defrost duration is twenty-five minutes.

Figure 3-15. 700TC/I-2 Signal Trace Schematic (High Voltage) of Freezer Adaptive Defrost

Length of defrost time monitored by microprocessor via defrost sense line

Drain trough heater energized during defrost and delay/dwell period

HIGH VOLTAGE

115 VOLTS

BLACK

WHITE

60 CYCLES

NEUT

WHITE

E2 E7 E10 E6

GRAY/WHITE

BLUE

DEFROST

TERMINATOR

30-38 OHMS

155-175 OHMS

DEFROST

HEATER

DRAIN TROUGH HEATER

Page 23

Electronic Control

Integrated (

700-

2) Series

3-13

#3756780 - Revision D - July, 2005

Figure 3-15. 700TC/I-2 Signal Trace Schematic (High Voltage) of Compressor Electrical System

Figure 3-16. SERVICE Flashing Possibly Because of Several Excessive Compressor Run Periods Occurring

UNIT

ICE

WARMER

COLDER

REFRIGERATOR

ON/OFF

WARMER

COLDER

FREEZER

SERVICE

length of compressor

run time is monitored

by microprocessor.

Monitor Compressor Run Duration, Displays If Service may be Needed (700TC/I-2, 700TR-2 and 700TF/I-2)

NOTE: A flashing SERVICE annunciator can indicate excessive compressor run or a faulty refrigerator evaporator

thermistor. Diagnostic Mode (covered later in this section) should be initiated to narrow the search for possibilities. This is also covered in the Troubleshooting Guide section of this manual.

NOTE: To clear a flashing SERVICE error annunciator, the problem must be corrected, then the unit must be

switched OFF and back ON.

NOTE: If the unit is ever switched OFF then back ON, the compressors will not energize for at least three minutes.

This three minute minimum OFF time is used to protect the compressor and its electricals.

HIGH VOLTAGE

115 VOLTS

E2 E7 E10 E6

60 CYCLES

BLACK

WHITE

GRAY

PURPLE

NEUT

WHITE

REFRIGERATOR

FAN SWITCH

REFRIGERATOR

COMPRESSOR

REFRIGERATOR

OVERLOAD

PROTECTOR

FREEZER

OVERLOAD

PROTECTOR

FREEZER

FAN

PURPLE RED

SWITCHES

FREEZER

COMPRESSOR

RED

REFRIGERATOR

FAN MOTOR

RUNNING

CAPACITOR

(WHEN USED)

STARTING

RELAY

RUNNING

CAPACITOR

(WHEN USED)

STARTING

RELAY

FREEZER

FAN MOTOR

SERVICE

FREEZER

COLDER

WARMER

COLDER

WARMER

REFRIGERATOR

ICE

ON/OFF

UNIT

ON/OFF

Page 24

Electronic Control

Integrated (

700-

2) Series

3-14

#3756780 - Revision D - July, 2005

Figure 3-17. 700TF/I-2V Signal Trace Schematic of Compressor Electrical System

3. Microprocessor monitors speed commands sent to compressor controller. If 4000 RPM speed command is observed continuously and for extended periods, SERVICE flashes on LCD.

2. 115 volts AC supplied to compressor controller

1. High offset temp reached, calling for cooling

Monitor Speed Signal of Variable Speed Compressor Controller, Displays If Service may be Needed (700TF/I-2V)

The microprocessor in the model 700TF/I-2V monitors speed commands it sends to the compressor controller (See

Figure 3-17). If the microprocessor continually sends commands to operate the compressor at highest speed (4000

RPM) for extended periods, a signal is sent to the SERVICE annunciator on the LCD to flash (See Figure 3-16).

NOTE: Speed commands will normally vary at 0, 1600, 1700, 1800, 2100, 2200, 2400, 2700, 3600 and 4000 RPM.

NOTE: Disconnected wires between the controller and J3 on the control board could also cause the SERVICE

annunciator to flash. This will be covered in the Troubleshooting Guide section of this manual.

NOTE: Also see NOTES on preceding page.

HIGH VOLTAGE

E2 E7 E10 E6

LOW VOLTAGE

V SPEED

CONTROL

BOX

BLACK

PINK W/BLACK PINK W/RED YELLOW W/RED YELLOW W/BLACK

WHITE

E2 E6E10E7

115 VOLTS 60 CYCLES

PURPLE

PIN 1

DISPLAY

PIN 1 PIN 1

NEUT

PIN 1

CONDENSER

FAN MOTOR

WHITE

FREEZER

FAN

PURPLE RED

SWITCHES

MEMBRANE SWITCH

BLUE W/BLACK STRIPE BLUE W/BLACK STRIPE

VSPEED

CONTROL

BOX

BROWN BLACK

FRZ CAB THERMISTOR

LT. BLUE

FREEZER

COMPRESSOR

FREEZER

FAN MOTOR

Page 25

Electronic Control

Integrated (

700-

2) Series

3-15

#3756780 - Revision D - July, 2005

Figure 3-18. 700TC/I-2 Signal Trace Schematic (High Voltage) of Icemaker Electrical System

Figure 3-19. ICE & SERVICE Flashing if Icemaker Water Valve Solenoid Energized More Than 15 Seconds

ICE

UNIT

ICE

WARMER

COLDER

REFRIGERATOR

ON/OFF

WARMER

COLDER

FREEZER

SERVICE

115 Volts to solenoid is monitored by microprocessor

If signal to solenoid lasts more than 15 seconds, power to icemaker system is disabled

Fill tube heater is energized whenever icemaker system is switched “ON” and ICE appears on LCD

Monitor Icemaker System and Display If Service Is Needed

The microprocessor monitors the 115 volts supplied to the icemaker water valve solenoid. If the solenoid is energized for more than fifteen seconds, power to the icemaker system is disabled (this does not include the fill tube heater). A signal is then sent to the SERVICE and ICE annunciators on the LCD to flash. (See Figure 3-18 & 3-19)

NOTE: To clear the SERVICE and ICE error annunciators, the problem must be corrected, then the unit must be

switched OFF and back ON.

NOTE: To allow ice to freeze fully and reduce effects of low water pressure, the electronic control system interrupts

power to the icemaker system for 45 minutes after each ice harvest. This feature is present in the tall units only.

HIGH VOLTAGE

115 VOLTS

BLACK

WHITE

60 CYCLES

NEUT

WHITE

E2 E7 E10 E6

TAN

PINK

TAN

ICEMAKER

SWITCH

ICEMAKER

WATER

VALVE

WHITE/BLUE

2300-2900 OHMS

FILL TUBE

HEATER

ICE

SERVICE

FREEZER

COLDER

WARMER

COLDER

WARMER

REFRIGERATOR

ICE

ON/OFF

UNIT

ON/OFF

Page 26

Electronic Control

Integrated (

700-

2) Series

3-16

#3756780 - Revision D - July, 2005

UNIQUE 700- 2 TALL UNIT ELECTRONIC CONTROL INPUT OPERATIONS

The following few pages illustrate unique 700-2 tall unit electronic control input operations performed at the control panel that you would not expect a customer to perform every day. The input operations described are: Temperature Unit Selection Mode, Sabbath Mode, Showroom Mode, Manual Compartment Disable Mode, and Manual Freezer Evaporator Defrost.

Temperature Units Selection Mode (Selecting Degrees Fahrenheit or Degrees Celsius Display)

700-2 electronic controls are initially set to display temperature in Fahrenheit (°F) units of measure. However, the temperature units displayed 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 (°F) readings to Celsius (°C) readings, press and hold the door ajar alarm bell key and the UNIT ON/OFF key simultaneously for five seconds, then release both keys (See

Figure 3-20). Then, “ °C “ will appear on the LCD indicating that temperatures will now be displayed in Celsius

units of measure. To convert back to Fahrenheit units of measure, repeat pressing the door ajar alarm bell key and the UNIT ON/OFF key simultaneously (See Figure 3-21).

NOTE: Temperature Units Selection Mode will end ten seconds after the last key stroke.

NOTE: Do not

press and hold the UNIT ON/OFF key first, this will simply switch the unit OFF.

UNIT

ICE

WARMER

COLDER

REFRIGERATOR

ON/OFF

WARMER

COLDER

FREEZER

Figure 3-21. Converting Back to Fahrenheit Units of Measure

(within ten seconds of previous key stroke and/or within first minute after switching unit ON)

Press and Hold the Door Ajar Alarm Bell Key and The UNIT ON/OFF Keys

UNIT

ICE

WARMER

COLDER

REFRIGERATOR

ON/OFF

WARMER

COLDER

FREEZER

Figure 3-20. Converting to Celsius Units of Measure (within first minute after switching unit ON)

Press and Hold the Door Ajar Alarm Bell Key and The UNIT ON/OFF Keys for Five Seconds

Sabbath Mode

Sabbath Mode was incorporated into the 700-2 electronic control system for the observance of certain religious days. Initiating Sabbath Mode disables the light switches and the circuits to the ice making system. The door ajar alarm is also disabled when the unit is in Sabbath Mode.

To initiate Sabbath Mode, the unit must first be switched OFF using the UNIT ON/OFF key (See Figure 3-22). With the unit switched OFF, press and hold the UNIT ON/OFF key for ten

seconds, then release (See Figure 3-23).

To return to normal lighting operation, press and release the UNIT ON/OFF key.

WARMER

FREEZER

COLDER

WARMER

COLDER

REFRIGERATOR

ICE

ON/OFF

FREEZER

COLDER

WARMER

COLDER

WARMER

REFRIGERATOR

ICE

ON/OFF

UNIT

ON/OFF

UNIT

ON/OFF

Page 27

Electronic Control

Integrated (

700-

2) Series

3-17

#3756780 - Revision D - July, 2005

UNIT

ICE

WARMER

COLDER

REFRIGERATOR

ON/OFF

WARMER

COLDER

FREEZER

UNIT

ICE

WARMER

COLDER

REFRIGERATOR

ON/OFF

WARMER

COLDER

FREEZER

Figure 3-23. After Unit is Switched OFF, Press and Hold the UNIT ON/OFF Key for Ten Seconds

UNIT

ICE

WARMER

COLDER

REFRIGERATOR

ON/OFF

WARMER

COLDER

FREEZER

OFF

Figure 3-22. To Enter Sabbath Mode, Switch Unit OFF First

Showroom Mode

Showroom Mode was incorporated into the 700-2 electronic control system so that Integrated 700-2 Series units could be displayed in a showroom setting. When in Showroom Mode, all cooling functions are disabled, but the lighting system remains active.

To initiate Showroom Mode, the unit must first be switched OFF using the UNIT ON/OFF key. (See Figure 3-24) 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 3-25)

To return unit to normal operating condition, repeat the steps of switching the unit OFF first. Then, press and hold the WARMER and COLDER keys, then press the UNIT ON/OFF key.

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 3-25. After Unit is Switched OFF, Press and Hold the WARMER and COLDER Keys,

Then Press the UNIT ON/OFF Key

Figure 3-24. To Enter (or Exit) Showroom Mode, Switch Unit OFF First

UNIT

ICE

WARMER

COLDER

REFRIGERATOR

ON/OFF

WARMER

COLDER

FREEZER

OFF

Press and hold for 10 seconds

OFF

FREEZER

COLDER

WARMER

COLDER

WARMER

REFRIGERATOR

ICE

ON/OFF

UNIT

ON/OFF

FREEZER

COLDER

WARMER

COLDER

REFRIGERATOR

ICE

ON/OFF

UNIT

ON/OFF

OFF

FREEZER

COLDER

WARMER

COLDER

WARMER

REFRIGERATOR

ICE

ON/OFF

UNIT

ON/OFF

FREEZER

COLDER

WARMER

COLDER

WARMER

REFRIGERATOR

ICE

ON/OFF

UNIT

ON/OFF

Page 28

Electronic Control

Integrated (

700-

2) Series

3-18

#3756780 - Revision D - July, 2005

Manual Compartment Disable Mode

The Manual Compartment Disable Mode allows a customer to switch one compartment off for interior cleaning purposes, while allowing the other compartment to continue cooling. A service technician may also find this feature helpful for service purposes.

To initiate Manual Compartment Disable Mode, the unit must first be switched OFF using the UNIT ON/OFF key

(See Figure 3-26). With the unit switched OFF, press and hold the WARMER key for the compartment being dis-

abled, then press the UNIT ON/OFF key, then release both keys (See Figure 3-27). The LCD will display “- -” (double dashes) in place of temperature readings for the compartment chosen, indicating that all cooling functions for that compartment are disabled.

To return unit to normal operating condition, repeat the steps of switching the unit OFF first. Then, press and hold the WARMER key for the disabled compartment, then press the UNIT ON/OFF key.

NOTE: Always recheck set-points after returning unit to normal operating condition.

UNIT

ICE

WARMER

COLDER

REFRIGERATOR

ON/OFF

WARMER

COLDER

FREEZER

Figure 3-27. After Unit is Switched OFF, Press and Hold the WARMER Key for the Compartment Being

Disabled, Then Press the UNIT ON/OFF Key.

Figure 3-26. To Enter (or Exit) Manual Compartment Disable Mode, Switch Unit OFF First

Indicating that all cooling functions for that compartment are disabled.

Manual Freezer Evaporator Defrost

Manual Freezer Evaporator Defrost was incorporated into the Integrated 700-2 Series electronic control to assist in servicing and problem diagnostics.

To manually initiate freezer evaporator defrost, press and hold the ICE key at the control panel for five seconds, then release the key. (See Figure 3-28).

NOTE: Manual Freezer Evaporator Defrost will not operate if unit is in Sabbath Mode.

Figure 3-28. Initiate Manual Freezer Evaporator Defrost - Press and Hold the ICE key for Five Seconds

UNIT

ICE

WARMER

COLDER

REFRIGERATOR

ON/OFF

WARMER

COLDER

FREEZER

OFF

ICE

UNIT

ICE

WARMER

COLDER

REFRIGERATOR

ON/OFF

WARMER

COLDER

FREEZER

Press and hold for 5 seconds

OFF

FREEZER

COLDER

WARMER

COLDER

WARMER

REFRIGERATOR

ICE

ON/OFF

UNIT

ON/OFF

UNIT

ON/OFF

FREEZER

COLDER

WARMER

COLDER

WARMER

REFRIGERATOR

ICE

ON/OFF

ICE

FREEZER

COLDER

WARMER

COLDER

REFRIGERATOR

ICE

ON/OFF

UNIT

ON/OFF

Page 29

Electronic Control

Integrated (

700-

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3-19

#3756780 - Revision D - July, 2005

Figure 3-31. Model 700TC/I-2

“ICE” & “SERVICE” Flashing = Water Valve Solenoid energized 15 Seconds, Icemaker System Disabled

NOTE: To clear this error indicator the problem must be corrected, then the unit switched OFF and back ON.

UNIT

ICE

WARMER

COLDER

REFRIGERATOR

ON/OFF

WARMER

COLDER

FREEZER

SERVICE

Figure 3-29. Model 700TC/I-2

“EE” Displayed at Left and “SERVICE” Flashing = Freezer Compartment Thermistor (or its Wiring) Fault

NOTE: To clear this error indicator the problem must be corrected

UNIT

ICE

WARMER

COLDER

REFRIGERATOR

ON/OFF

WARMER

COLDER

FREEZER

SERVICE

Figure 3-30. Model 700TC/I-2

“EE” Displayed at Right and “SERVICE” Flashing = Refrig. Compartment Thermistor (or its Wiring) Fault

NOTE: To clear this error indicator the problem must be corrected

ICE

UNIT

ICE

WARMER

COLDER

REFRIGERATOR

ON/OFF

WARMER

COLDER

FREEZER

SERVICE

UNIT

ICE

WARMER

COLDER

REFRIGERATOR

ON/OFF

WARMER

COLDER

FREEZER

SERVICE

Figure 3-32. Model 700TC/I-2

“SERVICE” Alone Flashing = Excessive Compressor Run (OR) Refrig. Evap. Thermistor (or its Wiring) Fault

NOTE: To help identify the problem, Diagnostic Mode (Covered later in this section) should be initiated.

NOTE: To clear this error indicator the problem must be corrected, then the unit switched OFF and back ON.

POSSIBLE 700-2 TALL UNIT ERROR INDICATORS

The next few pages contain diagrams illustrating what a customer may see on the LCD if there is a problem/error with the unit. Please note the serial number breaks listed under some diagrams.

• For Model 700TC/I-2, See Figures 3-29 through 3-33

• For Model 700TR-2, See Figures 3-34 through 3-37

• For Model 700TF/I-2 and Model 700TF/I-2V, See Figures 3-38 through 3-41

Figure 3-33. Model 700TC/I-2 (AFTER SERIAL #1759493)

“EC” at Right and “SERVICE” Flashing = Excessive Compressor Run with Error Codes Registered

NOTE: To clear this error indicator and error code, the problem must be corrected, then the alarm bell ON/OFF

key must be pressed and held for 15 seconds.

SERVICE

FREEZER

COLDER

WARMER

COLDER

WARMER

REFRIGERATOR

ICE

ON/OFF

UNIT

ON/OFF

SERVICE

FREEZER

COLDER

WARMER

COLDER

WARMER

REFRIGERATOR

ICE

ON/OFF

UNIT

ON/OFF

ICE

SERVICE

FREEZER

COLDER

WARMER

COLDER

WARMER

REFRIGERATOR

ICE

ON/OFF

UNIT

ON/OFF

SERVICE

FREEZER

COLDER

WARMER

COLDER

WARMER

REFRIGERATOR

ICE

ON/OFF

UNIT

ON/OFF

SERVICE

FREEZER

WARMERCOLDER

REFRIGERATOR

ON/OFF

UNITICE

ON/OFF

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UNIT

WARMER

COLDER

DOOR

ON/OFF

WARMER

COLDER

DRAWERS

SERVICE

Figure 3-35. Model 700TR-2

“EE” Displayed at Right and “SERVICE” Flashing = Upper Compartment Thermistor (or its Wiring) Fault

NOTE: To clear this error indicator the problem must be corrected

UNIT

WARMER

COLDER

DOOR

ON/OFF

WARMER

COLDER

DRAWERS

SERVICE

Figure 3-36. Model 700TR-2

“SERVICE” Alone Flashing = Excessive Compressor Run (OR)

Upper or Lower Evap. Thermistor (or its Wiring) Fault

NOTE: To help identify the problem, Diagnostic Mode (Covered later in this section) should be initiated.

NOTE: To clear this error indicator the problem must be corrected, then the unit switched OFF and back ON.

UNIT

WARMER

COLDER

DOOR

ON/OFF

WARMER

COLDER

DRAWERS

SERVICE

Figure 3-34. Model 700TR-2

“EE” Displayed at Left and “SERVICE” Flashing = Lower Compartment Thermistor (or its Wiring) Fault

NOTE: To clear this error indicator the problem must be corrected

WARMER

COLDER

DOOR

WARMER

COLDER

DRAWERS

Figure 3-37. Model 700TR-2 (AFTER SERIAL #1759163)

“EC” at Right and “SERVICE” Flashing = Excessive Compressor Run with Error Codes Registered

NOTE: To clear this error indicator and error code, the problem must be corrected, then the alarm bell ON/OFF

key must be pressed and held for 15 seconds.

SERVICE

DRAWERS

COLDER

WARMER

COLDER

WARMER

DOOR

ON/OFF

UNIT

ON/OFF

SERVICE

DRAWERS

COLDER

WARMER

COLDER

WARMER

DOOR

ON/OFF

UNIT

ON/OFF

SERVICE

DRAWERS

COLDER

WARMER

COLDER

WARMER

DOOR

ON/OFF

UNIT

ON/OFF

SERVICE

DRAWERS

COLDER

WARMER

COLDER

WARMER

DOOR

ON/OFF

UNIT

ON/OFF

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ICE

UNIT

ICE

ON/OFF

WARMER

COLDER

FREEZER

SERVICE

Figure 3-39. Model 700TF/I-2 & 700TF/I-2V

“ICE” & “SERVICE” Flashing = Water Valve Solenoid energized 15 Seconds, Icemaker System Disabled

NOTE: To clear this error indicator the problem must be corrected, then the unit switched OFF and back ON.

UNIT

ICE

ON/OFF

WARMER

COLDER

FREEZER

SERVICE

Figure 3-38. Model 700TF/I-2 & 700TF/I-2V

“EE” Displayed and “SERVICE” Flashing = Compartment Thermistor (or its Wiring) Fault

NOTE: To clear this error indicator the problem must be corrected

UNIT

ICE

ON/OFF

WARMER

COLDER

FREEZER

SERVICE

Figure 3-40. Model 700TF/I-2 & 700TF/I-2V

(700TF/I-2) “SERVICE” Alone Flashing = Excessive Compressor Run

(700TF/I-2V) “SERVICE” Alone Flashing = Excessive High-Speed Commands to Variable Speed Compressor

NOTE: To clear this error indicator the problem must be corrected, then the unit switched OFF and back ON.

UNIT

ICE

ON/OFF

WARMER

COLDER

FREEZER

Figure 3-41. Model 700TF/I-2 & 700TF/I-2V (AFTER SERIAL #1757258)

(700TF/I-2) “EC” at Right & “SERVICE” Flashing = Excessive Compressor Run with Error Codes

(700TF/I-2V) “EC” at Right & “SERVICE” Flashing = Excessive High-Speed Commands to Variable Speed

Compressor with Error Codes

NOTE: To clear this error indicator and error code, the problem must be corrected, then the alarm bell ON/OFF

key must be pressed and held for 15 seconds.

SERVICE

FREEZER

COLDER

WARMER

ICE

ON/OFF

UNIT

ON/OFF

ICE

SERVICE

FREEZER

COLDER

WARMER

ICE

ON/OFF

UNIT

ON/OFF

SERVICE

FREEZER

COLDER

WARMER

ICE

ON/OFF

UNIT

ON/OFF

SERVICE

FREEZER

COLDER

WARMER

ICE

ON/OFF

UNIT

ON/OFF

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700-2 TALL UNIT ELECTRONIC CONTROL TROUBLESHOOTING INPUT OPERATIONS

The following few pages explain troubleshooting input operations performed at the 700-2 tall unit control panel. The input operations described are Diagnostic Mode, Manual Component Activation Mode and Temperature Log Recall.

Diagnostic Mode

Initiating Diagnostic Mode allows the Service Technician to observe real-time temperature readings from all thermistors without temperature averaging.

NOTE: The models 700TF/I-2 & 700TF/I-2V have only one compartment thermistor and one evaporator thermistor.

NOTE: Since Diagnostic Mode varies only slightly between the different models, a diagram of the 700TC/I-2 control

panel is used to illustrate Diagnostic Mode key strokes.

To initiate Diagnostic Mode, the unit must be ON. With the unit ON, press and hold either

COLDER key, then press the UNIT ON/OFF key, then release both keys (See Figure 3-42). The left display area will show the real-time temperature of the thermistor being read, the right display area will show the thermistor location code, and all annunciators will illuminate on the LCD indicating the unit is in Diagnostic Mode. Pressing either

COLDER key while in Diagnostic Mode will toggle to the next thermistor location. (See Figure 3-43, 3-44, 3-45 below and thermistor loca-

tion code tables on next page)

NOTE: After serial #1759493 (700TC/I-2), #1759163 (700TR-2) and #1757258 (700TF/I-2 & 700TF/I-2V), it is also

possible to toggle through the thermistor locations using the WARMER keys.

NOTE: After serial #1759493 (700TC/I-2), #1759163 (700TR-2) and #1757258 (700TF/I-2 & 700TF/I-2V), If the

COLDER and UNIT ON/OFF keys are pressed and held for 10 seconds, Manual Component Activation Mode will be initiated (this is covered later in the section).

NOTE: Diagnostic Mode will end 20 seconds after the last key stroke.

Figure 3-42. Initiate Diagnostic Mode - Press and Hold Either COLDER Key, Then the UNIT ON/OFF Key

(“F” Indicates Freezer Compartment)

Figure 3-43. Toggle Through Temperature Readings - Press Either COLDER Key

(“r” Indicates Refrigerator Compartment)

Figure 3-44. Toggle Through Temperature Readings - Press Either COLDER Key

(“FE” Indicates Freezer Evaporator)

Figure 3-45. Toggle Through Temperature Readings - Press Either

COLDER Key

(“rE” Indicates Refrigerator Evaporator)

ICE

SERVICE

OFF

FREEZER

WARMERCOLDER

REFRIGERATOR

ON/OFF

UNITICE

ON/OFF

ICE

SERVICE

OFF

FREEZER

WARMERCOLDER

REFRIGERATOR

ON/OFF

UNITICE

ON/OFF

SERVICE

ICE

OFF

SERVICE

ICE

OFF

FREEZER

WARMERCOLDER

FREEZER

WARMERCOLDER

REFRIGERATOR

ON/OFF

UNITICE

ON/OFF

UNITICE

ON/OFF

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UNIT

ICE

WARMER

COLDER

REFRIGERATOR

ON/OFF

WARMER

COLDER

FREEZER

ICE

SERVICE

OFF

UNIT

ICE

WARMER

COLDER

REFRIGERATOR

ON/OFF

WARMER

COLDER

FREEZER

ICE

SERVICE

OFF

Figure 3-46. “EE” Observed in Diagnostic Mode = Thermistor Fault in Location Indicated by Code

Figure 3-47. “Sr” Observed While in Diagnostic Mode = Unit is in Showroom Mode

If “EE” is observed in left display area during Diagnostic Mode, the thermistor in that location is open or shorted, or there is a break in that thermistor’s wiring (See Figure 3-46).

If “Sr” is observed at left display area during Diagnostic Mode, the unit is in Showroom Mode, which was explained earlier in this section (See Figure 3-47).

ICE

UNIT

ICE

ON/OFF

WARMER

COLDER

FREEZER

SERVICE

OFF

Figure 3-48. (700TF/I-2V Only) “SP” Observed While in Diagnostic Mode = Compressor Speed Command

If “SP” is observed in right display area during Diagnostic Mode, this indicates the speed commands being sent from the microprocessor to the compressor controller. This will only appear in the model 700TF/I-2V. (See Figure 3-48).

NOTE: Speed commands display as: “00” = 0 RPM, “16” = 1600 RPM, “17” = 1700 RPM, “18” = 1800 RPM, “21” =

2100 RPM, “22” = 2200 RPM, “24” = 2400 RPM and “27” = 2700 RPM, “36” = 3600 RPM and “40” = 4000 RPM

After serial #1759493 (700TC/I-2), #1759163 (700TR-2) and #1757258 (700TF/I-2 & 700TF/I-2V), If “EC” is observed in the right display area during Diagnostic Mode, the numbers at left are “Error Codes” (See Figure 3-49 and the Error Code Table on next page). Error Codes indicate problems registered by specific components. If error codes are registered, they will appear before temperature readings and can be toggled through with the temperature readings as described on the previous page.

Figure 3-49. “EC” Observed While in Diagnostic Mode = Error Code (See Table on Following Page)

700TC/I-2

THERMISTOR LOCATION CODE

Freezer Compartment F

Refrigerator Compartment r

Freezer Evaporator FE

Refrigerator Evaporator rE

700TR-2

THERMISTOR LOCATION CODE

Lower Compartment L

Upper Compartment U

Lower Evaporator LE

Upper Evaporator UE

700TF/I-2

THERMISTOR LOCATION CODE

Freezer Compartment F

Freezer Evaporator FE

700TF/I-2V

THERMISTOR LOCATION CODE

Compressor Speed SP

Freezer Compartment F

Freezer Evaporator FE

ICE

SERVICE

OFF

FREEZER

COLDER

WARMER

COLDER

WARMER

REFRIGERATOR

ICE

ON/OFF

UNIT

ON/OFF

ICE

SERVICE

OFF

FREEZER

COLDER

WARMER

COLDER

WARMER

REFRIGERATOR

ICE

ON/OFF

UNIT

ON/OFF

ICE

SERVICE

OFF

FREEZER

COLDER

WARMER

ICE

ON/OFF

UNIT

ON/OFF

ICE

SERVICE

OFF

FREEZER

WARMERCOLDER

REFRIGERATOR

ON/OFF

UNITICE

ON/OFF

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Error Code Table

CODE INDICATION

05 Refrig. cabinet thermistor read open or shorted for 10+ seconds, or repeatedly read erratic temp’s 06 Refrig. evaporator thermistor read open or shorted for 10+ seconds, or repeatedly read erratic temp’s 07 Freezer cabinet thermistor read open or shorted for 10+ seconds, or repeatedly read erratic temp’s 08 Freezer evaporator thermistor read open or shorted for 10+ seconds, or repeatedly read erratic temp’s 20 Defrost under-heat with no voltage feedback through Gray/White wire at defrost start 21 Defrost overheat 22 No voltage feedback through Gray/White wire at defrost start 23 Defrost overheat with no voltage feedback through Gray/White wire at defrost start 24 Defrost under-heat 80 High VS compressor differential pressure or low voltage supplied to VS compressor 81 High amperage draw at VS compressor 82 VS compressor could not maintain lowest minimum speed at highest current draw 83 Locked VS compressor rotor 84 Short circuit at VS compressor controller output circuit 85 VS compressor converter overheated and shut down VS compressor 86 Serial communication failure between VS compressor controller and electronic control board

87 Speed information from electronic control board is out of specification 88 Electronic control board not receiving status data in response to speed commands

If error codes are observed during Diagnostic Mode, a non-flashing SERVICE annunciator will appear on the LCD when Diagnostic Mode ends, indicating error codes are still registered (See Figure 3-50). To clear a non-flashing SERVICE annunciator and the error codes, the problem must be corrected and the unit must be ON. Then, the Bell ON/OFF key must be pressed and held for fifteen seconds. The control will emit a short “beep” when the SERVICE annunciator and error codes are cleared. (See Figure 3-51)

Figure 3-51. Clear Non-flashing SERVICE Annunciator - Press & Hold Bell ON/OFF Key for 15 Seconds

Figure 3-50. Non-flashing SERVICE Annunciator after Diagnostic Mode = Error Codes were Registered

Press and hold for 15 seconds

NOTE: Error Codes were incorporated into the electronic control system after serial #1759493 (700TC/I-2),

#1759163 (700TR-2) and #1757258 (700TF/I-2 & 700TF/I-2V). The Error Code table below only applies to units after these serial numbers.

NOTE: VS compressor = Variable Speed compressor

NOTE: Currently, Error Codes are registered because of thermistor errors, defrost system errors or 700TF/I-2V vari-

able speed compressor control system errors. The table above will be updated through addendums when subsequent software and electrical changes occur and more error codes are added. See paragraph below for instructions on how to clear Error Codes.

SERVICE

FREEZER

WARMERCOLDER

REFRIGERATOR

ON/OFF

UNITICE

ON/OFF

UNITICE

ON/OFF

BEEP!

FREEZER

WARMERCOLDER

REFRIGERATOR

ON/OFF

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Figure 3-52. Initiate Manual Component Activation Mode -

Press and Hold Desired COLDER Key and UNIT ON/OFF Key for 10 Seconds

Manual Component Activation Mode

After serial #1759493 (700TC/I-2), #1759163 (700TR-2) and #1757258 (700TF/I-2 & 700TF/I-2V), a Manual Component Activation Mode was added to the electronic control system. Manual Component Activation Mode allows a Service Technician to energize a cooling system for five minutes. When activated, the chosen compartment’s compressor and evaporator fan are energized along with the condenser fan. While in Component Activation Mode, the evaporator temperatures for that compartment are displayed on the LCD. This also allows the Service Technician to check for proper voltage readings at the activated components without having to wait for the compartment to call for cooling.

To initiate Manual Component Activation Mode, the unit must be ON. With the unit ON, press and hold the desired compartment COLDER key and the UNIT ON/OFF key for ten seconds (See Figure 3-52). The evaporator temperature for that compartment will be displayed in the left display area of the LCD and the right display area will show the thermistor location.

NOTE: If the COLDER and UNIT ON/OFF keys are pressed and held for less then 10 seconds, Diagnostic Mode

will be initiated. This was covered earlier in the section.

NOTE: It is possible to toggle through the the other temperature readings as in Diagnostic Mode, but in this case

the temperature readings will last for five minutes rather than twenty seconds.

NOTE: The compressor overload could prevent the compressor from energizing.

NOTE: Manual Component Activation Mode will end five minutes after it is initiated. It is possible to end this five

minute run time and return to normal operation by switching the unit OFF then back ON. If this is done, note that the electronic control will observe a three minute minimum compressor OFF time when the unit is switched back ON. This is to protect the compressor and its electricals.

Press and hold for 10 seconds

ICE

SERVICE

OFF

FREEZER

WARMERCOLDER

REFRIGERATOR

ON/OFF

UNITICE

ON/OFF

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Temperature Log Recall Mode

The electronic control system is equipped with a temperature history data storage system. This system logs/stores the average temperature of each individual thermistor every two hours (rounded to the nearest two degrees), along with any event indicators (explained later in this section), that may have occurred. These two-hour periods are referred to as “indexes”. Up to 168 indexes can be stored for each compartment, making it possible to observe the preceding fourteen days of the unit’s temperature history (each index equals 2 hour temperature average; 2 hours X 168 indexes = 14 days). After 168 indexes are stored, each new index will bump the oldest index. Index number “1” being the most recent two-hour temperature average and index number “168” being the oldest. Accessing this temperature history data so it can be viewed on the LCD is accomplished by initiating Temperature Log Recall Mode.

There are two ways to initiate Temperature Log Recall Mode. One allows viewing of compartment temperature history only (see below), the other allows viewing of compartment temperature history and evaporator temperature history (see following page).

NOTE: Temperature Log Recall mode as described on the following page is only possible after serial #1759493

(700TC/I-2), #1759163 (700TR-2) and #1757258 (700TF/I-2 & 700TF/I-2V).

Initiate Temperature Log Recall Mode To View Compartment Temperature History Only - Begin with the unit ON. Now, press and hold the desired compartment WARMER key, then press the UNIT ON/OFF key, then release both keys (See Figure 3-53). The left display area on the LCD will show average compartment thermistor temperature and in the right display area will be the index number. The first index number will be “1”, indicating the most recent two-hour temperature average. The right display area will also flash the thermistor location code at three second intervals (See Figure 3-54).

Figure 3-53. Initiate Temperature Log Recall Mode To View Compartment Temperature History Only -

Press and Hold Desired WARMER Key, Then Press UNIT ON/OFF Key

Figure 3-54. Thermistor Location Code Flashes Every Three Seconds

Figure 3-55. Toggle Up Through Indexes - Press WARMER Key in Consecutive Key Strokes

Figure 3-56. Toggle Down Through Indexes - Press COLDER Key in Consecutive Key Strokes

To toggle up through the indexes (from 1 to 168), press the same WARMER key in multiple key strokes (See Figure

3-55). To toggle down through the indexes (from 168 to 1), press the corresponding COLDER key in multiple key

strokes (See Figure 3-56).

FREEZER

WARMERCOLDER

REFRIGERATOR

ON/OFF

UNITICE

ON/OFF

FREEZER

WARMERCOLDER

REFRIGERATOR

ON/OFF

UNITICE

ON/OFF

FREEZER

WARMERCOLDER

REFRIGERATOR

ON/OFF

UNITICE

ON/OFF

FREEZER

WARMERCOLDER

REFRIGERATOR

ON/OFF

UNITICE

ON/OFF

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Figure 3-59. Initiate Temperature Log Recall Mode To View Temperature History -

Press and Hold Desired

WARMER Key and UNIT ON/OFF Key

Figure 3-57. Initiate Diagnostic Mode - Press and Hold Either COLDER Key, then the UNIT ON/OFF Key

Figure 3-58. Toggle Through Temperature Readings - Press Either COLDER Key or Either WARMER Key

Until Desired Thermistor Temperature is Displayed

Initiate Temperature Log Recall Mode To View Compartment and Evaporator Temperature History - After serial #1759493 (700TC/I-2), #1759163 (700TR-2) and #1757258 (700TF/I-2 & 700TF/I-2V) Temperature Log Recall Mode was expanded to include the average evaporator temperatures. To view evaporator temperatures as well as the compartment temperatures, begin with the unit ON and in Diagnostic Mode (See Figure 3-57). While in Diagnostic Mode, toggle through the readings until the desired thermistor temperature is displayed on the LCD (See

Figure 3-58). Now, press the WARMER key for that compartment and the UNIT ON/OFF key simultaneously (See Figure 3-59). The left display area on the LCD will show average thermistor temperature and in the right display area

will be the index number “1” indicating the most recent two-hour temperature average (See Figure 3-59). The right display area will also flash the thermistor location code at three second intervals (See Figure 3-60).

To toggle up through the indexes (from 1 to 168), press the same WARMER key in multiple key strokes (See Figure

3-61). To toggle down through the indexes (from 168 to 1), press the corresponding COLDER key in multiple key

strokes (See Figure 3-62).

Figure 3-60. Thermistor Location Code Flashes Every Three Seconds

Figure 3-61. Toggle Up Through Indexes - Press WARMER Key in Consecutive Key Strokes

Figure 3-62. Toggle Down Through Indexes - Press COLDER Key in Consecutive Key Strokes

ICE

SERVICE

OFF

FREEZER

WARMERCOLDER

REFRIGERATOR

ON/OFF

UNITICE

ON/OFF

ICE

SERVICE

OFF

FREEZER

WARMERCOLDER

REFRIGERATOR

ON/OFF

UNITICE

ON/OFF

FREEZER

WARMERCOLDER

REFRIGERATOR

ON/OFF

UNITICE

ON/OFF

FREEZER

WARMERCOLDER

REFRIGERATOR

ON/OFF

UNITICE

ON/OFF

FREEZER

WARMERCOLDER

REFRIGERATOR

ON/OFF

UNITICE

ON/OFF

FREEZER

WARMERCOLDER

REFRIGERATOR

ON/OFF

UNITICE

ON/OFF

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Figure 3-64. SERVICE Annunciator Illuminates - Indicates Unit was switched OFF During that Index Period

by Pressing UNIT ON/OFF Key

Figure 3-65. Bell Illuminates - Indicates Power Failure / Interruption During that Index Period

Figure 3-66. Double Dashes ( - - ) Displayed Instead of Temperature for Several Consecutive Index Periods -

Indicates Bad EEPROM on Control Board. Board Must be Replaced

NOTE: Double dashes will also be observed when in Manual Compartment Disable Mode. Only when double

dashes are observed in Temperature Log Recall Mode for several consecutive indexes

should the control board be

replaced.

NOTE: If Manual Compartment Disable Mode has been activated during any of the 168 indexes, average tempera-

tures will continue to be logged. No event indicator will appear with these temperatures.

NOTE: If the unit was in Showroom Mode during any of the 168 indexes, average temperatures will continue to be

logged. No event indicator will appear with these temperatures.

NOTE: If the unit was switched OFF by pressing the UNIT ON/OFF key during any of the 168 indexes and there

was still 115V AC supplied to the control board, the average temperatures will continue to be logged. This means temperatures would be expected to rise and the SERVICE annunciator would be present in all indexes in which the unit was OFF.

NOTE: Temperature Log Recall Mode will end 20 seconds after the last key stroke.

Possible Event Indicators During Temperature Log Recall Mode(s)

The diagrams below illustrate possible event indicators that may be observed while in Temperature Log Recall Mode. (See Figures 3-63 through 3-66)

Figure 3-63. “bl” Indicates Index is “blank” - No Temperature has Been Logged Yet

(Only possible within first 14 days of unit operation, or after new control board is installed during service)

FREEZER

WARMERCOLDER

REFRIGERATOR

ON/OFF

UNITICE

ON/OFF

SERVICE

FREEZER

WARMERCOLDER

REFRIGERATOR

ON/OFF

UNITICE

ON/OFF

FREEZER

WARMERCOLDER

REFRIGERATOR

ON/OFF

UNITICE

ON/OFF

FREEZER

WARMERCOLDER

REFRIGERATOR

ON/OFF

UNITICE

ON/OFF

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Index= Hours Past

1 = 2 Hrs 2=4 Hrs 3=6 Hrs 4 = 8Hrs 5 = 10Hrs 6 = 12 Hrs 7 = 14 Hrs 8 = 16 Hrs 9 = 18 Hrs

10 = 20 Hrs

11 = 22 Hrs 12 = 24 Hrs (1 Day) 13 = 26 Hrs 14 = 28 Hrs 15 = 30 Hrs 16 = 32 Hrs 17 = 34 Hrs 18 = 36 Hrs 19 = 38 Hrs 20 = 40 Hrs 21 = 42 Hrs 22 = 44 Hrs 23 = 46 Hrs 24 = 48 Hrs (2 Days) 25 = 50 Hrs 26 = 52 Hrs 27 = 54 Hrs 28 = 56 Hrs 29 = 58 Hrs 30 = 60 Hrs 31 = 62 Hrs 32 = 64 Hrs 33 = 66 Hrs 34 = 68 Hrs 35 = 70 Hrs 36 = 72 Hrs (3 Days) 37 = 74 Hrs 38 = 76 Hrs 39 = 78 Hrs 40 = 80 Hrs 41 = 82 Hrs 42 = 84 Hrs

Index= Hours Past

43 = 86 Hrs 44 = 88 Hrs 45 = 90 Hrs 46 = 92 Hrs 47 = 94 Hrs 48 = 96 Hrs (4 Days) 49 = 98 Hrs 50 = 100 Hrs 51 = 102 Hrs 52 = 104 Hrs 53 = 106 Hrs 54 = 108 Hrs 55 = 110 Hrs 56 = 112 Hrs 57 = 114 Hrs 58 = 116 Hrs 59 = 118 Hrs 60 = 120 Hrs (5 Days) 61 = 122 Hrs 62 = 124 Hrs 63 = 126 Hrs 64 = 128 Hrs 65 = 130 Hrs 66 = 132 Hrs 67 = 134 Hrs 68 = 136 Hrs 69 = 138 Hrs 70 = 140 Hrs 71 = 142 Hrs 72 = 144 Hrs (6 Days) 73 = 146 Hrs 74 = 148 Hrs 75 = 150 Hrs 76 = 152 Hrs 77 = 154 Hrs 78 = 156 Hrs 79 = 158 Hrs 80 = 160 Hrs 81 = 162 Hrs 82 = 164 Hrs 83 = 166 Hrs 84 = 168 Hrs (7 Days)

Index= Hours Past

85 = 170 Hrs 86 = 172 Hrs 87 = 174 Hrs 88 = 176 Hrs 89 = 178 Hrs 90 = 180 Hrs 91 = 182 Hrs 92 = 184 Hrs 93 = 186 Hrs 94 = 188 Hrs 95 = 190 Hrs 96 = 192 Hrs (8 Days) 97 = 194 Hrs 98 = 196 Hrs

99 = 198 Hrs 100 = 200 Hrs 101 = 202 Hrs 102 = 204 Hrs 103 = 206 Hrs 104 = 208 Hrs 105 = 210 Hrs 106 = 202 Hrs 107 = 214 Hrs 108 = 216 Hrs (9 Days) 109 = 218 Hrs

110 = 220 Hrs

111 = 222 Hrs 112 = 224 Hrs 113 = 226 Hrs 114 = 228 Hrs 115 = 230 Hrs 116 = 232 Hrs 117 = 234 Hrs 118 = 236 Hrs 119 = 238 hrs

120 = 240 Hrs (10 Days) 121 = 242 Hrs 122 = 244 Hrs 123 = 246 Hrs 124 = 248 Hrs 125 = 250 Hrs 126 = 252 Hrs

Index= Hours Past

127 = 254 Hrs 128 = 256 Hrs 129 = 258 Hrs 130 = 260 Hrs 131 = 262 Hrs 132 = 264 Hrs (11 Days) 133 = 266 Hrs 134 = 268 Hrs 135 = 270 hrs 136 = 272 Hrs 137 = 274 Hrs 138 = 276 Hrs 139 = 278 Hrs 140 = 280 Hrs 141 = 282 Hrs 142 = 284 Hrs 143 = 286 Hrs 144 = 288 Hrs (12 Days) 145 = 290 Hrs 146 = 292 Hrs 147 = 294 Hrs 148 = 296 Hrs 149 = 298 Hrs 150 = 300 Hrs 151 = 302 Hrs 152 = 304 Hrs 153 = 306 Hrs 154 = 308 Hrs 155 = 310 Hrs 156 = 312 Hrs (13 Days) 157 = 314 Hrs 158 = 316 Hrs 159 = 318 Hrs 160 = 320 Hrs 161 = 322 Hrs 162 = 324 Hrs 163 = 326 hrs 164 = 328 Hrs 165 = 330 Hrs 166 = 332 Hrs 167 = 334 Hrs 168 = 336 Hrs (14 Days)

Temperature Log Index Chart

NOTE : The chart below applies to the hours in which the control has power. Temperature history data will only be

stored when the control has 115V AC supplied to it. If power to the unit is interrupted, the average temperatures for that time period are stored with the event indicator. The temperature history data is stored in a non-volatile memory, so the data is not erased by a power failure, but actual time passage during the power failure will not be shown.

TEMPERATURE LOG INDEX CHART

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Figure 3-67. Basic 700-2 Base Unit Electronic Control System Diagram

BASIC 700- 2 BASE UNIT ELECTRONIC CONTROL SYSTEM

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 control board (located in the sump area). Temperatures and possible problems with the unit are displayed in the control panel on the LCD. This page illustrates a basic 700-2 base unit electronic control system. (See Figure 3-67) The entire electronic control system is described in greater detail on the following pages.

CONTROL PANEL ASSEMBLY

LCD

BAFFLE CONTROL

(BR-2 Only)

ICEMAKER SWITCH

ICEMAKER (BF/I-2 Only)

FREEZER

WARMER

COLDER

CONTROL BOARD

(BF/I-2 Only)

LIGHTS

ICE

ON/OFF

UNIT

ON/OFF

UPPER

COMPARTMENT

THERMISTOR

DRAWER SWITCH

(UPPER)

LOWER

COMPARTMENT

THERMISTOR

(BR-2 Only)

DRAWER SWITCH

(LOWER)

EVAP THERMISTOR

NEUT

115 VOLTS

60 CYCLES

EVAP FAN

DEFROST TERMINATOR

WATER

SOLENOID

(BF/I-2 Only)

DEFROST HEATER (BF/I-2 Only)

(BF/I-2 Only)

COMPRESSOR

COND FAN

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Figure 3-68. 700-2 Base Unit Control Board Layout

Figure 3-69. 700-2 Base Unit Control Board Summary Table (700BF/I-2 Summary Table Shown)

700-2 BASE UNIT CONTROL BOARD LAYOUT AND SUMMARY TABLE

The electrical connection points on the 700-2 base unit control board are labeled alphanumerically. These labels correspond with the alphanumeric control board summary table, located on all 700 Series wiring diagrams. By referencing the summary table, it is possible to identify which components are connected at which points on the control board. Below is a layout diagram of the control board, and a copy of a summary table. (See Figures 3-68 & 3-69)

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.

TERM.

P1 P2 P3 P4 P5 P6 P7 P8 P9 P10 P11 P12 P13 P14

P11

P10

P7 P9 P8

P14

TEST

DESCRIPTION

THERMISTORS LIGHT SWITCH REMOTE DISPLAY BAFFLES L2-NEUTRAL 115 WHITE L1-HOT 115 LIGHTS-115V OUT DEFROST HEATER EVAPORATOR FAN ICEMAKER SWITCH JUMPER

------

-----COMPRESSOR MANUFACTURING TEST

COLOR

SEE AUX. CHART ----WHITE/RED

SEE AUX. CHART

-----WHITE BLACK ORANGE BLUE RED PINK BLACK

------

-----PURPLE

------

ABBR.

WH/RD

-----

BLACK ORANG BLUE RED PINK BLACK

-----

----PURPLE TESTP15

P4P2 P3

REMOTE DISPLAY

ZONE THERMISTORS

P15

TERM.

P3 1

No#

2 3 4 5 6 7 8

2 3 4 5 6

AUXILIARY CHART

COLOR

EMPTY

EMPTY BLUE W/RED BLUE W/RED LT. BLUE W/YELLOW LT. BLUE W/YELLOW BLUE W/BLACK BLUE W/BLACK

BLACK

WHITE RED YELLOW ORANGE BLUE

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SERVICE

OFF

700-2 BASE UNIT CONTROL PANEL LAYOUT

Please note that in the second part of this section the illustrations of the control panel will vary between the 700BR-2 and the 700BF/I-2, depending on the topic covered. (See Figure 3-70 & 3-71)

NOTE: The LCD on the Integrated 700-2 Series base units is not back lit by unit lighting. It will appear darker than

the LCD on Integrated 700-2 Series tall units.

Figure 3-70. 700BR-2 Control Panel Layout

UNIT

ON/OFF

KEY

DRAWER

AJAR

ALARM

ON/OFF

KEY

UPPER DRAWER

SET-POINT

ADJUSTMENT

KEYS

LOWER DRAWER

SET-POINT

ADJUSTMENT

KEYS

LCD

Liquid

Crystal

Display

Figure 3-71. 700BF/I-2 Control Panel Layout

ICE

SERVICE

OFF

UNIT

ON/OFF

KEY

DRAWER

AJAR

ALARM

ON/OFF

KEY

ICEMAKER SYSTEM

ON/OFF

KEY

SET-POINT

ADJUSTMENT

KEYS

LCD

Liquid

Crystal

Display

SERVICE

Jake Dog was here

OFF

LOWER

DRAWER

COLDER

WARMER

UPPER

DRAWER

COLDER

WARMER

ON/OFF

UNIT

ON/OFF

SERVICE

ICE

Jake Dog was here

OFF

FREEZER

WARMER

COLDER

ON/OFF

ICE

ON/OFF

UNIT

ON/OFF

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WHEN IN OFF MODE, 115 VOLTS AC IS STILL PRESENT AT CONTROL BOARD.

Figure 3-72. 700-2 Base Unit ON/OFF, Press UNIT ON/OFF Key

BASIC 700-2 BASE UNIT ELECTRONIC CONTROL INPUT OPERATIONS

The following illustrations show the basic input operations performed at the 700-2 base unit control panel. Switching the unit ON and OFF, adjusting the set-point (temperature adjustments), switching the ice maker system ON and OFF (700BFI-2 only), and enabling and disabling the door ajar alarm feature will be explained.

Unit ON/OFF

All units are shipped in the Off Mode and when power is supplied to the unit, a trace of the word “OFF” is visible on the LCD. By pressing and releasing the UNIT ON/OFF key (See Figure 3-72), 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 the UNIT ON/OFF key, a trace of the word “OFF” will be visible

on the LCD as long as there is power to the unit.

Adjusting Set-Point (Temperature Adjustments)

To adjust the set-points, press the appropriate compartment WARMER or COLDER key on the control panel in multi

ple key strokes until the desired set-point is achieved. One key stroke equals a one degree (Fahrenheit or Celsius) change. (See Figure 3-73)

NOTE: Temperature ranges are -5°F (-21°C) to +5°F (-15°C) in freezer compartment, with an initial set-point of

0°F (-18°C), and +34°F (+1°C) to +45°F (+7°C) in refrigerator compartment, with an initial set-point of +38°F (+3°C).

NOTE: The initial key stroke of the WARMER or COLDER keys will change the previous set-point by one degree

(Fahrenheit or Celsius).

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 compartment temperature will be displayed. As the compartment temperature changes, the temperature displayed on the LCD will change by no more than one degree per minute.

Figure 3-73. Adjusting the Set-Point - Press WARMER or COLDER Key In Multiple Key Strokes

LOWER

DRAWER

COLDER

WARMER

UPPER

DRAWER

COLDER

WARMER

ON/OFF

UNIT

ON/OFF

LOWER

DRAWER

COLDER

WARMER

UPPER

DRAWER

COLDER

WARMER

ON/OFF

UNIT

ON/OFF

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Icemaker System ON/OFF (700BFI-2 Only)

All 700BFI-2 units are shipped with the icemaker system switched of

f. By pressing and releasing 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-

75). To disable the icemaker system, press and release the ICE ON/OFF key again and “ICE” will disappear from

the LCD indicating the icemaker system is off.

NOTE: When the unit is in “Sabbath Mode,” the icemaker system is de-energized. Sabbath Mode will be explained

in UNIQUE ELECTRONIC CONTROL SYSTEM INPUT OPERATIONS.

NOTE: Unlike the 700-2 tall units, there is not a 45 minute dwell after an ice harvest in a 700BF/I-2 unit. The ice-

maker water valve is also not monitored by the control board.

Figure 3-75. 700BFI-2 Icemaker System ON/OFF - Press ICE ON/OFF Key

ICE

Drawer Ajar Alarm ON/OFF

All Integrated 700-2 Series base 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 and release the drawer ajar alarm bell ON/OFF key on the control panel. A bell annunciator will appear on the LCD indicating that the alarm feature is active. (See Figure 3-74) Now, if a drawer is open for 30 seconds, the bell annunciator 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 annunciator on the LCD will disappear, indicating the alarm feature is of

Figure 3-74. Drawer Ajar Alarm ON/OFF, Press Alarm Bell ON/OFF Key

LOWER

DRAWER

COLDER

WARMER

UPPER

DRAWER

COLDER

WARMER

ON/OFF

UNIT

ON/OFF

ICE

COLDER

WARMER

FREEZER

ICE

ON/OFF

UNIT

ON/OFF

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FUNCTIONS OF 700 BASE UNIT ELECTRONIC CONTROL SYSTEM

The following few pages explain the monitoring, regulating and controlling functions of the electronic control system. Signal trace schematics illustrations are used to demonstrate current flow for the function being explained.

NOTE: Only normal operating electronic control functions are described along with problems which could cause

error annunciators. All possible malfunctions are addressed in the Troubleshooting Guide.

Supply Power to the Lighting System

115 Volts are supplied to the lighting system through the control board when the unit is switched on

by pressing the

UNIT ON/OFF key and a drawer is opened (See Figure 3-76).

NOTE: Disabling the lighting system (Sabbath Mode) is covered in UNIQUE ELECTRONIC CONTROL SYSTEM

INPUT OPERATIONS.

Figure 3-76. Signal Trace Schematic (High Voltage) of Lighting System

When a drawer is opened, 115 Volts are supplied to lighting system unless unit is switched OFF or is in Sabbath Mode

HIGH VOLTAGE

115 VOLTS 60 CYCLES

BLACK

NEUTRAL

WHITE

MAIN BOARD

ORANGE

TOP DRAWER LIGHT

LOWER DRAWER LIGHT

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Monitor, Regulate and Display Two Separate Compartment Temperatures in the 700BR-2

Figure 3-77. Signal Trace Schematic (High & Low Voltage)

of Model 700BR-2 with Both Compartments Calling for Cooling

Figure 3-78. Average Refrigerator Compartment Temperatures Displayed

Upper and lower compartments calling for cooling. Upper Thermistor controls compressor. Lower Thermistor controls air babble.

Evap fan, compressor and condenser fan energized

Air baffle open

By using an electronically controlled air baffle, it is possible to adjust the set-point in the lower drawer of a 700BR-2 a maximum of three degrees colder than the upper drawer.

Power to the compressor and condenser fan in a 700BR-2 is controlled by the thermistor located inside the upper reed switch. When the upper drawer compartment temperature reaches high offset, the control board energizes the evaporator fan, compressor and condenser fan. (See

Figure 3-77) When the low offset temper-

ature is achieved in the upper drawer, the control board de-energizes the evaporator fan, compressor and condenser fan.

If the lower drawer compartment temperature (sensed by the thermistor in the lower reed switch) is at high offset when the refrigeration system is running, the air baffle will be energized to open. (See Figure

3-77) When the temperature in the lower

drawer reaches low offset, the air baffle is closed.

Though the compartment air temperatures will fluctuate, the LCD displays the average compartment temperatures (See

Figure 3-78).

NOTE: If the temperature in the lower

compartment rises five degrees above its high offset and the upper compartment is not calling for cooling, the air baffle will open and the evaporator fan will be energized, but the compressor and condenser fan will remain off

. The air baffle will remain open until both compartments are equal in temperature.

NOTE: If the compartment temperature

should ever exceed either the high offset or low offset (example: when a door is left open), the temperature displayed on the LCD will change by one degree per minute.

LOW VOLTAGE

BAFFLE LOWER DRAWER

HIGH VOLTAGE

BLACK

DISPLAY BOARD

THERMISTOR

LOWER DRAWER

THERMISTOR

TOP DRAWER

115 VOLTS 60 CYCLES

NEUTRAL

MAIN BOARD

YELLOW W/WHITE YELLOW W/RED YELLOW W/BLACK

BLUE W/RED BLUE W/RED

BLUE W/YELLOW BLUE W/YELLOW

WHITE

RED

PURPLE

OVERLOAD PROTECTOR

EVAPORATOR FAN MOTOR

COMPRESSOR

CONDENSER FAN

COMPRESSOR STARTING RELAY

LOWER

DRAWER

COLDER

WARMER

UPPER

DRAWER

COLDER

WARMER

ON/OFF

UNIT

ON/OFF

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Figure 3-80. Average Freezer Compartment Temperature Displayed

Figure 3-79. Signal Trace Schematic (High & Low Voltage) of

700BF/I-2 Calling for Cooling

The two drawers of the 700BF/I-2 are considered one compartment/zone. It is not possible to set two different set-points for the individual drawers.

The temperature signal from the thermistor in the upper reed switch is monitored by the microprocessor, and displayed on the LCD. Though the compartment air temperature does fluctuate, the LCD displays the average temperature (See

Figure 3-80). When the compartment

temperature reaches high offset, the microprocessor supplies power to the evaporator fan, compressor and condenser fan. (See Figure 3-79). When the compartment temperature reaches low offset, the microprocessor interrupts power to the compressor and evaporator fan, cycling them of

NOTE: If the compartment temperature

should ever exceed either the high offset or low offset (example: when a door is left open), the temperature displayed on the LCD will change by one degree per minute.

High offset temperature

detected

Evap fan, compressor and condenser fan energized

Monitor, Regulate and Display Temperatures in the 700BF/I-2

LOW VOLTAGE SCHEMATIC

DISPLAY BOARD

THERMISTOR

TOP DRAWER

HIGH VOLTAGE SCHEMATIC

BLACK

MAIN BOARD

115 VOLTS 60 CYCLES

NEUTRAL

RED

PURPLE

LT. BLUE W/YELLOW LT. BLUE W/YELLOW

EVAPORATOR FAN MOTOR

OVERLOAD PROTECTOR

COMPRESSOR

RUNNING CAPACITOR

COMPRESSOR STARTING RELAY

MAIN BOARD

WHITE

CONDENSER FAN

COLDER

WARMER

FREEZER

ICE

ON/OFF

UNIT

ON/OFF

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Monitor and Control Refrigerator Off-Cycle Defrost in the 700BR-2

If the the upper drawer compartment in a 700BR-2 calls for cooling (upper compartment at high offset temperature), but the temperature sensed by the evaporator thermistor has not reached 38°F (3°C), the evaporator fan will be energized, but power to the compressor and condenser fan will wait. This allows the refrigerator evaporator to fully defrost before the compressor and condenser fan are energized. (See Figure 3-81)

Figure 3-81. Signal Trace Schematic (High & Low Voltage) of Model 700BR-2 Refrigerator Off-Cycle Defrost

1. High offset temperature detected

2. Evaporator temp below 38°F (3°C)

3. Evap fan energized

4. Compressor & Condenser fan wait until evap rises to 38°F (3°C)

LOW VOLTAGE

MAIN BOARD

DISPLAY BOARD

BLUE W/RED BLUE W/RED

BLUE W/YELLOW BLUE W/YELLOW BLUE W/BLACK BLUE W/BLACK

THERMISTOR

LOWER DRAWER

HIGH VOLTAGE

BLACK

THERMISTOR

TOP DRAWER

THERMISTOR

EVAPORATOR

115 VOLTS 60 CYCLES

MAIN BOARD

NEUTRAL

RED

EVAPORATOR FAN MOTOR

OVERLOAD PROTECTOR

COMPRESSOR

CONDENSER FAN

COMPRESSOR STARTING RELAY

WHITE

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Initially, the freezer compressor will cyclerun for twelve hours, after which the microprocessor sends the signal to the defrost relay on the control board to close. This supplies power to the defrost heater, and the compressor is switched off. With the “Adaptive Defrost” technique, the length of time that the heater stays on to heat the evaporator to 52°F is observed by the microprocessor via the evaporator thermistor.

NOTE: The defrost terminator in a

700BF/I-2 is there only to prevent the defrost heater from staying energized too long, in the event of an evaporator thermistor failure.

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 3-82) This is an ongoing process whereby the defrost time and the defrost interval will vary by unit use.

NOTE: A five minute time delay/dwell fol-

lows all defrosts. At the end of the five minute dwell, the compressor is 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 six

hours; the maximum defrost interval is forty-two hours; the maximum defrost duration is twenty minutes.

Figure 3-82. Signal Trace Schematic (High & Low Voltage)

of Model 700BF/I-2 Freezer Adaptive Defrost

Defrost circuit energized

Timeframe for evap to reach 52°F observed via evap thermistor

Monitor and Control “Adaptive Defrost” in the 700BF/I-2

LOW VOLTAGE SCHEMATIC

DISPLAY BOARD

THERMISTOR

EVAPORATOR

HIGH VOLTAGE SCHEMATIC

BLACK

MAIN BOARD

115 VOLTS 60 CYCLES

NEUTRAL

RED

BLUE W/BLACK BLUE W/BLACK

MAIN BOARD

WHITE

DEFROST TERMINATOR

GRAY

DRAIN HEATER

FILL TUBE HEATER

DEFROST HEATER

25 - 29 OHMS

1700 - 2100 OHMS

2300 -2900 OHMS

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UNIQUE 700- 2 BASE UNIT ELECTRONIC CONTROL INPUT OPERATIONS

The following pages illustrate unique 700-2 base unit 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 (°F) readings to a Celsius (°C) readings, press and hold the door ajar alarm bell key and the UNIT ON/OFF key simultaneously for five seconds, then release the keys.

(See Figure 3-83) “°C“ will appear on the LCD indicating that temperatures will now be displayed in Celsius units of

measure. To convert back to Fahrenheit units of measure, repeat the steps above.

NOTE: Temperature Units Selection Mode will end ten seconds after the last key stroke.

Figure 3-83. Converting Units of Measure (within first minute after switching unit ON)

Press and Hold the Door Ajar Alarm Bell Key and The UNIT ON/OFF Key for Five Seconds

Sabbath Mode

Sabbath Mode was incorporated into the 700-2 electronic control system for the observance of certain religious days. Initiating Sabbath Mode disables the light switches and the circuits to the ice making system The door ajar alarm is also disabled when the unit is in Sabbath Mode.

To initiate Sabbath Mode, the unit must first be switched OFF using the UNIT ON/OFF key (See Figure 3-84). With the unit switched OFF, press and hold the UNIT ON/OFF key for ten

seconds, then release (See Figure 3-85).

To return to normal lighting operation, press and release the UNIT ON/OFF key.

Figure 3-85. After Unit is Switched OFF, Press and Hold the UNIT ON/OFF Key for Ten Seconds

OFF

Figure 3-84. To Enter Sabbath Mode, Switch Unit OFF First

Press and hold for 10 seconds

LOWER

DRAWER

COLDER

WARMER

UPPER

DRAWER

COLDER

WARMER

ON/OFF

UNIT

ON/OFF

OFF

LOWER

DRAWER

COLDER

WARMER

UPPER

DRAWER

COLDER

WARMER

ON/OFF

UNIT

ON/OFF

LOWER

DRAWER

COLDER

WARMER

UPPER

DRAWER

COLDER

WARMER

ON/OFF

UNIT

ON/OFF

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Showroom Mode

To initiate Showroom Mode, the unit must first be switched OFF using the UNIT ON/OFF key (See Figure 3-86). With the unit switched OFF, press and hold the WARMER and COLDER keys, then press the UNIT ON/OFF key, then release all three keys (See Figure 3-87).

To return unit to normal operating condition, repeat the steps above.

NOTE: Always recheck set-points after returning unit to normal operating condition.

NOTE: Unlike the 700-2 tall units, it is not

possible to determine if a base unit is in Showroom Mode by initiating

Diagnostic Mode and looking for “Sr”.

- To determine if a 700BF/I-2 unit is in Showroom Mode, press the ICE key on the control panel and listen for the relay on the control board to “click.” If a “click” is not heard, the unit is in Showroom Mode.

- To determine if a 700BR-2 unit is in Showroom Mode, open both drawers to warm the compartments, adjust setpoints to 34°F (1°C) and listen for the compressor and condenser fan to energize. Due to the three minute minimum-off time, and depending on how cold the compartments are, this may take several minutes to verify.

Figure 3-87. After Unit is Switched OFF, Press and Hold the WARMER and COLDER Keys,

Then Press the UNIT ON/OFF Key

Figure 3-86. To Enter (or Exit) Showroom Mode, Switch Unit OFF First

OFF

Manual Freezer Evaporator Defrost (700BF/I-2 Only)

Manual Freezer Evaporator Defrost was incorporated into the 700BF/I-2 electronic control to assist in servicing and diagnosing.

To manually initiate freezer evaporator defrost, press and hold the ICE key at the control panel for five seconds, then release the key (See Figure 3-88).

NOTE: Manual Freezer Evaporator Defrost will not operate if unit is in Sabbath Mode.

Figure 3-88. Initiate Manual Freezer Evaporator Defrost - Press and Hold the ICE key for Five Seconds

ICE

Press and hold for 5 seconds

OFF

LOWER

DRAWER

COLDER

WARMER

UPPER

DRAWER

COLDER

WARMER

ON/OFF

UNIT

ON/OFF

LOWER

DRAWER

COLDER

WARMER

UPPER

DRAWER

COLDER

WARMER

ON/OFF

UNIT

ON/OFF

ICE

FREEZER

WARMER

COLDER

ICE

ON/OFF

UNIT

ON/OFF

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POSSIBLE 700-2 BASE UNIT ERROR INDICATORS

This page contains diagrams illustrating what customers may see on the LCD if a problem/error exists with the unit. (For Model 700BR-2, see Figures 3-89 through 3-93. For Model 700BF/I-2, see Figures 3-92 through 3-94.)

NOTE: A blinking “SERVICE” annunciator in a base unit indicates thermistor faults only

. Unlike the tall units, the blinking “SERVICE” annunciator cannot indicate excessive compressor run, because the length of compressor runtime is not monitored on base units.

NOTE: Unlike the 700-2 tall units, the “SERVICE” and “ICE” annunciators on the LCD of a 700BFI-2 will not blink,

and the ice making system will not be disabled, if the water valve is energized for more than 15 seconds.

NOTE: To clear thermistor error indicators, the problem must be corrected.

Figure 3-90. For Model 700BR-2

“EE” Displayed at Right and “SERVICE” Flashing = Upper Compartment Thermistor (or its Wiring) Fault

Figure 3-89. For Model 700BR-2

“EE” Displayed at Left and “SERVICE” Flashing = Lower Compartment Thermistor (or its Wiring) Fault

Figure 3-91. For Model 700BR-2

“SERVICE” Blinking = Evaporator Thermistor Fault or Break in Thermistor Wiring

SERVICE

Figure 3-94. For Model 700BF/I-2

“EE” Displayed at Left and “SERVICE” Flashing = Freezer Compartment Thermistor (or its Wiring) Fault

Figure 3-93. For Model 700BR-2 & 700BF/I-2

“E3” Displayed = Communication Error Between Control Board and Control Panel

Figure 3-92. For Model 700BR-2 & 700BF/I-2

“E0” Displayed = Communication Error Between Control Board and Control Panel

SERVICE

LOWER

DRAWER

COLDER

WARMER

UPPER

DRAWER

COLDER

WARMER

ON/OFF

UNIT

ON/OFF

SERVICE

LOWER

DRAWER

COLDER

WARMER

UPPER

DRAWER

COLDER

WARMER

ON/OFF

UNIT

ON/OFF

SERVICE

LOWER

DRAWER

COLDER

WARMER

UPPER

DRAWER

COLDER

WARMER

ON/OFF

UNIT

ON/OFF

LOWER

DRAWER

COLDER

WARMER

UPPER

DRAWER

COLDER

WARMER

ON/OFF

UNIT

ON/OFF

LOWER

DRAWER

COLDER

WARMER

UPPER

DRAWER

COLDER

WARMER

ON/OFF

UNIT

ON/OFF

SERVICE

COLDER

WARMER

FREEZER

ICE

ON/OFF

UNIT

ON/OFF

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SERVICE

OFF

SERVICE

OFF

700-2 BASE UNIT ELECTRONIC CONTROL TROUBLESHOOTING INPUT OPERATIONS

This page illustrates 700-2 base unit troubleshooting input operations performed at the control panel, which at this writing is only Diagnostic Mode.

Diagnostic Mode

Diagnostic Mode allows the service technician to observe real-time temperature readings from the thermistors in both compartments and at both evaporators without off-set adjustments or temperature averaging.

NOTE: There is only one compartment thermistor and one evaporator thermistor in the model 700BF/I-2.

NOTE: Since the Diagnostic Mode varies only slightly between the 700BR-2 and 700BF/I-2, a diagram of the

700BR-2 control panel is used to illustrate Diagnostic Mode key strokes.

To initiate Diagnostic Mode, the unit must be ON. With the unit ON, press and hold either

COLDER key, then press the UNIT ON/OFF key, then release both keys. The left temperature display area indicates the real-time temperature of the first thermistor being read. The left temperature display area shows a code which indicates the location of the thermistor, and all annunciators illuminate on the LCD indicating the unit is in Diagnostic Mode (See Figure 3-

95 and Thermistor Location Code Tables at bottom of page). Pressing either COLDER key while in Diagnostic Mode

will toggle to the next thermistor location (See Figure 3-96 and Thermistor Location Code Tables at bottom of page).

NOTE: If “EE” is observed in the left temperature display area during Diagnostic Mode, the thermistor in that loca-

tion is defective or there is a break in that thermistor’s wiring.

NOTE: Diagnostic Mode will end twenty seconds after the last key stroke.

Figure 3-95. Initiating Diagnostic Mode

Press and Hold Either COLDER Key, Then Press the UNIT ON/OFF Key

Figure 3-96. Toggling Through Temperature Readings in Diagnostic Mode

Press Either COLDER Key

Base Unit Thermistor Location Code Tables

700BR-2

THERMISTOR LOCATION CODE

Lower Compartment L

Upper Compartment U

Evaporator E

700BF/I-2

THERMISTOR LOCATION CODE

Freezer Compartment F

Evaporator E

SERVICE

OFF

LOWER

DRAWER

COLDER

WARMER

UPPER

DRAWER

COLDER

WARMER

ON/OFF

UNIT

ON/OFF

SERVICE

OFF

LOWER

DRAWER

COLDER

WARMER

UPPER

DRAWER

COLDER

WARMER

ON/OFF

UNIT

ON/OFF

Page 54

Electronic Control

Integrated (

700-

2) Series

3-44

#3756780 - Revision D - July, 2005

ADDITIONAL 700-2 BASE UNIT ELECTRONIC CONTROL NOTES

- There is not

a 45 minutes dwell after each ice harvest in the BFI-2.

- The “SERVICE” and “ICE” annunciators on the LCD of a 700BFI-2 will not

blink, and the ice making system will

not be disabled, if the water valve is energized for more than 15 seconds.

- There is not a Manual Compartment Disable Mode in 700-2 base units, because there is only one compressor.

- There is not a Manual Component Activation Mode in 700-2 base units.

- The 700-2 Base unit’s electronic control system does not

have Error Codes.

- There is not

a Temperature Log recall Mode for the 700-2 base units.

Page 55

Sealed System Information

Integrated (

700-

2) Series

4-2

#3756780 - Revision D - July, 2005

HFC-134a REFRIGERANT SERVICE INFORMATION

The 700-2 Series sealed systems contain HFC-134a refrigerant. This section provides some general rules for working with 134a, and explains procedures to be followed while servicing the sealed system. This is followed by diagrams which illustrate sealed system operation, then model-specific refrigerant flow diagrams.

134a refrigerant requires Synthetic Ester oil in the compressor, and does not tolerate contamination from other refrigerants, moisture, petroleum-based lubricants, silicone lubricants, cleaning compounds, rust inhibitors, leak detection dyes, or any other type of additive.

General Rules for Working with 134a Refrigerant

• Use equipment dedicated to 134a sealed system service only.

• Use only 134a refrigerant for back-flushing and sweep charging.

• Always replace the filter-drier when servicing the sealed system.

• The filter-drier must be cut from the sealed system. Never un-braze the drier as the heat will drive moisture back into the sealed system.

• Do not leave sealed system nor replacement compressor open to the atmosphere for more than 10 minutes.

• When the rubber plugs are pulled from the service compressor, a release of pressure should be heard. If no release of pressure is heard, do not use the compressor.

• Use ONLY virgin 134a refrigerant when recharging the sealed system.

Page 56

Sealed System Information

Integrated (

700-

2) Series

4-3

#3756780 - Revision D - July, 2005

SEALED SYSTEM REP

AIR PROCEDURES

Service Procedures

a. Capture refrigerant b. Replace compressor c. Replace filter-drier d. Evacuate or sweep charge system e. Recharge system with Virgin 134a refrigerant

a. Capture refrigerant b. Repair leak c. Replace filter-drier d. Evacuate or sweep charge system e. Recharge system with Virgin 134a refrigerant

a. Capture refrigerant b. Repair leak (if at solder joint) or replace part c. Back flush high side of sealed system d. If all refrigerant has escaped and system is in a vacuum, replace compressor e. Replace filter-drier f. Evacuate or sweep charge system g. Recharge system with Virgin 134a refrigerant

a. Capture refrigerant b. Repair leak (if at solder joint) or replace part c. Back flush high side of sealed system d. Replace compressor e. Replace filter-drier f. Replace heat exchanger if cap tube is clogged g. Install a low side drier on suction line h. Evacuate or sweep charge sealed system i. Recharge with Virgin 134a refrigerant

a. Capture refrigerant b. Locate and remove restriction or locate and replace part c. Back flush high side of sealed system d. Replace filter-drier e. Evacuate or sweep charge system f Recharge system with Virgin 134a refrigerant.

a. Capture refrigerant b. Replace filter-drier c. Evacuate or sweep charge system d. Recharge system with Virgin 134a refrigerant

Problem

Non-Operating, Inefficient, Noisy Compressor

(NOTE: To check for a non-operating compressor, a hard start kit can be used)

High Side leak

Low Side Leak

Contaminated System

Examples: > Compressor Burn out > Excessive moisture

from leak in condensate loop or in low side

> Plugged capillary tube

Restriction

(NOTE: If restriction is due to sealed system being contaminated, see Contaminated Sealed System above.)

Overcharge

Page 57

Sealed System Information

Integrated (

700-

2) Series

4-4

#3756780 - Revision D - July, 2005

Figure 4-2. Condenser & Heater Loop

SEALED SYSTEM OPERATION

The six diagrams on these pages illustrate a basic sealed system. The components are listed in order of refrigerant flow, with an explanation of their fundamental role as part of a sealed system. NOTE: These illustrations do not

represent any specific 700-2 sealed system.

Compressor (Figure 4-1)

The compressor creates a high side and low side pressure difference in the sealed system by compressing the refrigerant gas, thus raising the pressure and temperature. The compressor pushes this high-pressure/high-heat gas to the condenser.

Condenser (Figure 4-2)

The high-pressure/high-heat gas travels through the condenser, where the heat is dissipated by cooler air being drawn over the condenser tubing by the condenser fan. This changes the gas into a high-pressure/warm liquid that is then routed through the door gasket seat heater loop to prevent sweating. After traveling through the heater loop, the high-pressure/warm liquid enters the high-side filterdrier.

Filter-Drier (Figure 4-3)

The high-pressure/warm liquid travels through the highside filter-drier, which removes moisture from the refrigerant before it enters the capillary tube.

Figure 4-3. Filter-Drier

COMPRESSOR

HEATER LOOP

CONDENSER

FILTER-DRIER

Page 58

Sealed System Information

Integrated (

700-

2) Series

4-5

#3756780 - Revision D - July, 2005

Figure 4-5. Evaporator

Capillary Tube (& Heat Exchanger) (Figure 4-4)

The warm liquid refrigerant travels through the long skinny capillary tube which is soldered to the suction line. (These two tubes soldered together create the heat exchanger.) As the warm liquid refrigerant travels through the capillary tube it gives up heat to the cool refrigerant gas traveling through the suction line and the pressure drops, so it is a low-pressure/cool liquid before it enters the evaporator.

Evaporator (Figure 4-5)

As the low-pressure/cool liquid refrigerant enters the evaporator, it vaporizes. This is caused by a dramatic pressure change which occurs when the refrigerant enters the larger diameter evaporator tubing from the smaller diameter capillary tubing. This vapor travels through the evaporator absorbing heat from the compartment, gradually converting it to a cool gas. This cool gas then enters the suction line.

Suction Line (& Heat Exchanger) (Figure 4-6)

The cool gas travels through the suction line which is soldered to the capillary tube. (As mentioned earlier, these two tubes soldered together create the heat exchanger.) As this cool refrigerant gas travels through the suction line it absorbs heat from the warm liquid refrigerant traveling through the capillary tube, making it a luke warm gas. The lukewarm refrigerant gas then returns to the compressor where the process begins again.

Figure 4-6. Suction Line & Heat Exchanger

Figure 4-4. Capillary Tube (& Heat Exchanger)

HEAT EXCHANGER

CAPILLARY TUBE

EVAPORATOR

HEAT EXCHANGER

SUCTION LINE

Page 59

Sealed System Information

Integrated (

700-

2) Series

4-6

#3756780 - Revision D - July, 2005

SEALED SYSTEM REFRIGERANT FLOW DIAGRAMS

Figure 4-7. Model 700TC/I-2 Refrigerant Flow

= REFRIGERATOR SEALED SYSTEM

= FREEZER SEALED SYSTEM

FRAME HEATER (HOT GAS)

REFRIGERATOR HEAT-EXCHANGER

FREEZER HEAT-EXCHANGER

REFRIGERATOR COMPRESSOR

FREEZER COMPRESSOR

REFRIGERATOR EVAPORATOR

FREEZER EVAPORATOR

FREEZER FILTER-DRIER

REFRIGERATOR FILTER-DRIER

CONDENSER

(FRONT - FREEZER) (BACK - REFRIGERATOR)

Page 60

Sealed System Information

Integrated (

700-

2) Series

4-7

#3756780 - Revision D - July, 2005

Figure 4-8. Model 700TR-2 Refrigerant Flow

Figure 4-9. Model 700TF/I-2 and 700TF/I-2V Refrigerant Flow

= UPPER REFRIGERATOR SEALED SYSTEM

= LOWER REFRIGERATOR SEALED SYSTEM

REFRIGERATOR HEAT-EXCHANGER

(UPPER)

FRAME HEATER (HOT GAS)

REFRIGERATOR EVAPORATOR

(UPPER)

REFRIGRATOR HEAT-EXCHANGER

(LOWER)

REFRIGERATOR COMPRESSOR

(UPPER)

REFRIGERATOR COMPRESSOR

(LOWER)

= FREEZER SEALED SYSTEM

REFRIGERATOR EVAPORATOR

(LOWER)

REFRIGERATOR FILTER-DRIER (UPR)

REFRIGERATOR FILTER-DRIER (LWR)

CONDENSER

(FRONT - REFRIGERATOR, LOWER) (BACK - REFRIGERATOR, UPPER)

FRAME HEATER (HOT GAS)

HEAT-EXCHANGER

COMPRESSOR

EVAPORATOR

FILTER-DRIER

CONDENSER

Page 61

Sealed System Information

Integrated (

700-

2) Series

4-8

#3756780 - Revision D - July, 2005

Figure 4-11. Model 700BF/I-2 Refrigerant Flow

Figure 4-10. Model 700BR-2 Refrigerant Flow

= REFRIGERATOR SEALED SYSTEM

EVAPORATOR

(EVAPORATOR SUMP)

HEAT-EXCHANGER

FRAME HEATER (HOT GAS)

FILTER-DRIER

= FREEZER SEALED SYSTEM

(EVAPORATOR SUMP)

COMPRESSOR

EVAPORATOR

CONDENSER

FRAME HEATER (HOT GAS)

HEAT-EXCHANGER

COMPRESSOR

FILTER-DRIER

CONDENSER

Page 62

Airflow & Fan Blade Spacing

Integrated (

700-

2) Series

5-3

#3756780 - Revision D - July, 2005

Figure 5-2. 700TR-2 Air Flow and Fan Blade Spacing

Figure 5-3. 700TF/I-2 and 700TF/I-2V Air Flow and Fan Blade Spacing

UPPER FAN MOTOR

Bracket

7/8"

± 1/16"

(2.22 cm ± .16 cm)

3/4"

± 1/16"

(1.91 cm ± .16 cm)

Blade

LOWER FAN MOTOR

Blade

Clamp Away From Motor

Bracket

Clamp Away From Motor

FAN MOTOR

Bracket

Blade

Prior to Serial #1757258 = 1" ± 1/16"

Starting w/Serial #1757258 =

Clamp Away From Motor

(2.54 cm ± .16cm)

1" ± 1/16"

(2.54 cm ± .16cm)

Page 63

Airflow & Fan Blade Spacing

Integrated (

700-

2) Series

5-2

#3756780 - Revision D - July, 2005

Figure 5-1. 700TC/I-2 Air Flow and Fan Blade Spacing

UPPER FAN MOTOR

Bracket

7/8"

± 1/16"

(2.22 cm ± .16 cm)

Bracket

Blade

LOWER FAN MOTOR

Clamp Away From Motor

Blade

7/8" ± 1/16"

(2.22 cm ± .16 cm)

Page 64

Airflow & Fan Blade Spacing

Integrated (

700-

2) Series

5-4

#3756780 - Revision D - July, 2005

Figure 5-4. 700BR-2 Air Flow and Fan Blade Spacing

Figure 5-5. 700BF/I-2 Air Flow and Fan Blade Spacing

11/16" ± 1/16"

(1.75 cm ± .16 cm)

Blade

Clamp Towards Motor

Bracket

11/16" ± 1/16"

(1.75 cm ± .16 cm)

Blade

Clamp Towards Motor

Bracket

Page 65

Icemaker Operation

Integrated (

700-

2) Series

6-2

#3756780 - Revision D - July, 2005

MODULAR ICEMAKER

All Integrated (700-2) Series units utilize a “modular icemaker”. The icemaker operation is not complex, however, an understanding of its cycle of operation is necessary in order for a serviceman to make a proper diagnosis.

Modular Icemaker Operation

When the icemaker thermostat has sensed temperatures of 17°F, the thermostat closes. At this time, the current now has a path through the thermostat to the motor. The motor is linked with the drive gear. From the module, there are copper contacts that ride on copper strips on the backside of the drive gear. (See Figure 6-1) As the drive gear rotates, these contacts from the module will make or break a circuit (track) to the copper strips to generate the icemaker cycle.

Figure 6-1. Modular Icemaker Electrical Schematic

Pink

Tan

Page 66

Icemaker Operation

Integrated (

700-

2) Series

6-3

#3756780 - Revision D - July, 2005

Additional Icemaker Operation Notes

NOTE 1: The ICE ON/OFF key at the control panel activates the icemaker system. If “ICE” is not displayed on the

LCD, the icemaker system is OFF.

NOTE 2: To allow ice to freeze fully and reduce effects of low water pressure, the electronic control system disables

the icemaker system for 45 minutes after each ice harvest (this does not

apply to the 700BFI-2). To

bypass the 45 minute dwell, press the ICE key to switch the ice making system OFF, then press the ICE key again to cycle the ice making system back ON.

NOTE 3: The ice bucket activates a switch when in place. If the ice bucket is not in proper position, ice production

will stop.

NOTE 4: The icemaker shut-off arm must be in the “down / on” position for the icemaker to operate.

NOTE 5: The icemaker relay on the control board also controls the fill tube heater and water valve.

What Happens During Ejector Blade Rotation

Figure 6-2 represents a view of the ejector blade from the front (or module side) of the icemaker. This diagram indicates what happens during the rotation of the ejector blade and will assist the Service Technician in diagnosing icemaker problems

Figure 6-2. Ejector Blade Rotation Diagram

Water Valve Energized

7.5 Seconds

140cc. or 4-3/4oz. Fill

(about 11:00 o'clock)

Thermistor Opens

in This Range of Rotation

Heater Off

6:00 o'clock (reference)

Ejector Blade Stop Position

(about 1:30 o'clock)

Start Position

Thermostat Closes

Motor On, Heater On

Ejector Blade Stalls on Ice

Motor On, Heater On

(1/2 Minute to 5 Minutes

about 4:00 o'clock)

Page 67

Icemaker Operation

Integrated (

700-

2) Series

6-4

#3756780 - Revision D - July, 2005

MODULAR ICEMAKER TEST PROCEDURES

Perform the following tests if the icemaker is thought to be defective. See Figure 6-3 for icemaker test port locations. Test 1 through 5 are performed with 115 Volts AC supplied to the icemaker, so read the “WARNING” below and the “additional Ice Production Notes” on the previous page before proceeding.

ELECTRIC SHOCK HAZARD! TESTS 1 THROUGH 5 ARE PERFORMED WITH 115V AC SUPPLIED TO THE ICEMAKER. CARE MUST BE TAKEN WHEN PERFORMING THESE TESTS TO AVOID SEVERE PERSONAL INJURY OR DEATH.

Voltage Tests

1. Check for 115 Volts AC between ports “L” and “N”. Make sure test probes go into test ports 1/2”.

2. Strip 1/2” of insulation from each end of a 3” piece of insulated 14 gauge wire to create a jumper/test wire. Insert the stripped ends of this jumper/test wire into ports “T” and “H” to bypass the thermostat.

NOTE: Do not place the jumper/test wire between any other ports as this will damage the icemaker.

If the motor doesn’t run, replace the module/motor assembly.

3. Leave the jumper/test wire in until the ejector blades rotate to approximately 8:00 o’clock. The mold heater should heat up. If not, see test 5 below.

4. Remove the jumper/test wire when the ejector blades reach the 8:00 o’clock position. The water valve should energize for 7.5 seconds when the ejector blades rotate to approximately 11:00 o’clock. If not, repeat test 2 through 4 and check for 115V AC to solenoid when ejector blades rotate to approximately 11:00 o’clock. If no voltage, check electrical connections.

Continuity Tests and Thermostat Inspection

5. With icemaker removed from the unit, check the resistance of the mold heater between ports “L” and “H.” Reading should be between 62 - 82 Ohms. Replace mold/heater assembly if outside this range.

6. With the module/motor separated from the mold/heater assembly, check the resistance of the motor between ports “L” and “M.” Reading should be between 3390 - 4410 Ohms. Replace module/motor assembly if outside this range.

7. If icemaker passes tests 1 through 6, check for adequate supply of Thermal-Mastic on icemaker thermostat. If little or no Thermal-Mastic, apply Thermal-Mastic to thermostat. If adequate supply is present, replace thermostat.

8. See General Troubleshooting Guide if icemaker passes tests 1 through 7.

NOTE: Never attempt to turn the icemaker ejector blades by hand. Doing so will damage the icemaker

Figure 6-3. Icemaker Test Ports

TEST PORTS

H-T L-H

L-M

L-N V-N

Thermostat Heater Motor 115V AC Valve

Page 68

Icemaker Operation

Integrated (

700-

2) Series

6-5

#3756780 - Revision D - July, 2005

WATER FILL ADJUSTMENT

The water valve should energize for approximately 7.5 seconds. This should supply 140cc. of water to the icemaker, or approximately 4.75oz. If this is not the case, the fill amount can be adjusted with the water fill adjustment screw. (See Figure 6-4)

To increase the fill amount, turn the water fill adjustment screw counterclockwise. To decrease the fill amount, turn the water fill adjustment screw clockwise. A 360° turn will affect the fill by 40cc. A 180° turn will effect the fill by 20cc.

ICEMAKER DISASSEMBLY

Module/Motor Assembly Removal

To remove the module/motor assembly, first remove the cover and the shut-off arm. Then, extract the module/motor assembly mounting screws and pull the module from the support. (See Figure 6-5)

Mold/Heater Assembly Removal

To remove the mold/heater assembly, first remove the cover and the shut-off arm. Insert a Phillips head screwdriver into the access holes and extract the screws. Then, pull the mold/heater assembly from the support. (See Figure 6-5)

Ejector Blades and/or Ice Stripper Removal

To remove the ejector blades and/or ice stripper, first remove the cover and the shut-off arm and disconnect the mold/heater assembly from the support. (See

Figure 6-5) Then, pull the ejector blades and/or ice

stripper from the mold.

Icemaker Thermostat Removal

To remove the icemaker thermostat, first remove the cover and the shut-off arm and disconnect the mold/heater assembly from the support. (See Figure 6-

5) Then, use a needle-nose pliers to grasp one of the

retaining clips and pull out. (See Figure 6-6)

Figure 6-4. Water Fill Adjustment

Figure 6-5. Icemaker Component Removal

Figure 6-6. Thermostat Retaining Clips

WATER FILL

ADJUSTMENT

SCREW

MODULE/MOTOR

ASSEMBLY

MOUNTING SCREWS

SHUT-OFF

ARM

MOLD ATTACHMENT

SCREW ACCESS HOLES

(2 - PHILLIPS HEAD)

Page 69

Component Access/Removal

Integrated (

700-

2) Series

7-2

#3756780 - Revision D - July, 2005

COMPONENT ACCESS AND REMOVAL

This section explains how to adjust, access and remove components from an Integrated (700-2) Series units.

There are two parts to this section. The first half pertains to the 700-2 tall units and the second half pertains to the 700-2 base units. If different models have similar adjusting, accessing and/or removal procedures, they are grouped together under the appropriate heading. The units covered in the procedures are listed between brackets after the heading. Both halves of this section are arranged as follows: Exterior cosmetic and mechanical components, followed by the internal cosmetic and mechanical components, unit tray mechanical components, with the sealed system components at the end of each half. An attempt has been made to arrange these procedures in such a way as to simulate which components would need to be removed first in order to gain access to other components. When following a component removal procedure, it may be necessary to reference another component removal procedure listed earlier in this section.

NOTE: Before continuing, please take note of the WARNINGS and CAUTIONS below.

- IF IT IS NECESSARY TO REMOVE A UNIT FROM ITS INSTALLATION, REMEMBER THAT THE UNIT COULD TIP FORWARD WHEN PULLED FORWARD BEYOND THE ANTI-TIP COMPONENTS, RESULTING IN SERIOUS INJURY OR DEATH. PULLING A UNIT FROM ITS INSTALLATION SHOULD ONLY BE PERFORMED BY AN AUTHORIZED SERVICE TECHNICIAN OR INSTALLER.

- TO AVOID ELECTRIC SHOCK, POWER TO THE UNIT MUST BE DISCONNECTED WHENEVER ACCESSING AND/OR REMOVING COMPONENTS POWERED BY ELECTRICITY OR COMPONENTS NEAR OTHER ELECTRICAL COMPONENTS. IF THE UNIT IS PLUGGED IN, BUT HAS NOT BEEN SWITCHED ON BY PRESSING THE UNIT ON/OFF KEY, 115 VOLTS AC IS STILL PRESENT AT THE CONTROL BOARD.

- IF REMOVING A DOOR OR DRAWER FROM A UNIT, REMEMBER THAT DOORS AND DRAWERS ARE HEAVY. IF THEY WERE TO FALL, THEY COULD CAUSE SERIOUS PERSONAL INJURY.

- If removing or disconnecting door hinge assemblies, remember they are spring loaded and may recoil quickly when released.

- If working in the compressor area, remember that compressor and tubing may be hot.

- If working on or around the evaporator or condenser, remember that evaporator and condenser fins are sharp.

Page 70

Component Access/Removal

Integrated (

700-

2) Series

7-3

#3756780 - Revision D - July, 2005

700-2 TALL UNIT EXTERIOR COSMETIC AND MECHANICAL COMPONENTS

Kickplate/Grille Removal (All Tall Units)

The kickplate/grille is attached by four screws passing through the kickplate into adjustable kickplate brackets.

NOTE: Because drawer panels may extend down in

front of the kickplate/grille, it may be necessary to remove the bottom drawer to gain access.

To remove the kickplate/grille, extract the four screws (two on each side) and pull the kickplate grille forward.

(See Figure 7-1)

Side Trim Molding Strip Removal (All Tall Units)

The side trim molding strips are held in place by four unit-to-cabinet brackets that are attached to the sides of the cabinet.

NOTE: Removing the drawers first will make this task

easier.

To remove the side trim molding strips, place a straightblade screwdriver in the channel at the bottom of the molding. (See Figure 7-2) Gently pull the molding forward until the face-frame edge of the molding is accessible. Place another straight-blade screwdriver under the face-frame edge and gently work the molding away from the face-frame and out of the four unit-to-cabinet brackets. (See Figure 7-2)

Upper Door Compartment Light Switch & Fan Switch Removal (All Tall Units)

The upper door compartment light switch and fan switch protrude through the top trim molding, just above the door. Tabs on the switches hold the switches in the switch bracket behind the top trim, and the bracket is attached to the switch enclosure with two screws.

NOTE: The switch with the white back is for the lights

and the switch with the black back is for the evaporator fan.

To access and remove a light and/or fan switch, First remove the the side molding strips. Then, pull the top of the top molding forward, then lift up. Remove the two screws from the switch bracket and pull the bracket forward. (See Figure 7-3) Disconnect the electrical leads from the switch being removed. Depress the tabs on the side of the switch and push the switch out of the bracket.

Figure 7-1. Kickplate/Grille Removal

Figure 7-3. Upper Light Switch & Fan Switch

Figure 7-2. Side Molding Strip Removal

Kickplate/Grille

Side

Molding

Strip

Gasket Seat

Unit to Cabinet Bracket

Switch Bracket

Switches

Top Trim Molding

Side Molding

Page 71

Component Access/Removal

Integrated (

700-

2) Series

7-4

#3756780 - Revision D - July, 2005

Drawer Assembly Removal (All Tall Units)

There are inverted channels on both sides of the drawer tubs which rest on telescoping drawer slide assemblies. A pin at the front of each drawer slide fits into a hole in the inverted channel of each drawer tub, holding the drawer assembly in place. (See Figure 7-4)

To remove a drawer assembly, pull the drawer open and lift the front of the drawer up and off of the pins at the end of the drawer slides. Pull the drawer assembly forward and out. Then, push the telescoping drawer slide assemblies back in.

Door & Drawer Gasket Removal (All Tall Units)

The door and drawer gaskets are pressed into retaining channels that are molded into the door and drawer liners.

NOTE: Drawer assemblies must be removed from the

unit in order to remove and/or install their gaskets.

To remove a door or drawer gasket, simply pull the gasket from the retaining channel. (See Figure 7-5)

Door Assembly Removal (All Tall Units)

The door assembly is held in place with Allen-head screws that pass down through the arm of the top hinge assembly and up through the arm of the bottom hinge assembly into the door. These mounting screws are concealed by a hinge cover on each hinge arm. The hinge covers are held in place by tabs that fit into notches in the hinge arms.

NOTE: Removing the top drawer first will make this

task easier.

To remove a door assembly, begin by opening the door and removing both hinge covers. With an Allen-head wrench, extract the two inner-most door mounting screws from the top and bottom hinge arms, leaving the two outer-most screws in place. Now, close the door and remove the outer-most door mounting screws from the bottom hinge arm, then remove the two outer-most door mounting screws from the top hinge arm, and lift the door from the unit. (See Figure 7-6)

Figure 7-4. Drawer Assembly Removal

Hole in Channel

Drawer Slide

Drawer Assembly

Figure 7-5. Gasket Removal

Figure 7-6. Door Assembly Removal

Hinge Cover

Remove two inner-most screws at top and bottom hinge with door open.

Remove two outer-most screws at bottom hinge first then at top, with door closed.

Door

Assembly

Hinge Arm

Door Gasket

Channel

Page 72

Component Access/Removal

Integrated (

700-

2) Series

7-5

#3756780 - Revision D - July, 2005

Upper and Lower Hinge Assembly Removal (All Tall Units)

The hinge assemblies are attached to hinge mounting brackets with Allen-head bolts.

To remove a hinge assembly, you will need to remove the door assembly first. Then, extract the Allen-head bolts from the appropriate hinge mounting bracket and pull the hinge assembly from the unit. (See Figure 7-7)

700-2 TALL UNIT INTERIOR COSMETIC, MECHANICAL AND ELECTRICAL COMPONENTS

Door Shelf and Dairy Compartment Adjustment / Removal (All Tall Units)

There are “L” shaped grooves in the end caps of the door shelves and dairy compartment, and there are knobs formed in the dikes of the door liner. (See Figure

7-8) The door shelves and the dairy compartment are

hung on the door by lining up the “L” shaped grooves with the knobs.

Push in and down to inst

all a door shelf. Pull up and

out to remove a door shelf.

Compartment Shelf Adjustment / Removal (All Tall Units)

Compartment shelf side rails have hooks at the back that allow the shelves to be hung from the shelf ladders.

To remove a compartment shelf, tilt the front of the shelf up, then lift the back of the shelf up to disengage the hooks from the shelf ladders and pull the shelf from the unit. (See Figure 7-9.)

To reinstall a compartment shelf, tilt the front of the shelf up and align the hooks with the slots the in shelf ladders, then insert the hooks into slots and lower the front of the shelf.

Figure 7-7. Hinge Assembly Removal

Hinge Arm

Bolt

Shelf Ladders

Figure 7-8. Door Shelf

Figure 7-9. Compartment Shelf Removal

“L” Shaped

Grooves

Door Shelf

Knobs

Door Liner

Compartment Shelves

Page 73

Component Access/Removal

Integrated (

700-

2) Series

7-6

#3756780 - Revision D - July, 2005

Upper Light Diffuser Removal (All Tall Units)

The side frames of the upper light diffuser have four inverted “T” shaped slots (two each side) which fit over pegs protruding from the side walls of the upper compartment. Retaining clips at the rear slots secure the diffuser to the rear pegs.

To remove the light diffuser, slide a finger over the top of each retainer clip flange and rotate the retainer clip down and back. (See Figure 7-8) With the clips open, lift the diffuser up and slide it towards the rear of the unit until the center of the “T” slots line up with the pegs. Then lower the diffuser down and pull forward from the unit. (See Figure 7-9)

Light Bulb Removal (All Tall Units)

To access the upper light bulbs, the light diffuser must be removed first. With the diffuser removed, screw the bulb counterclockwise to remove it and clockwise to install it. (See Figure 7-10)

The light bulbs in the drawer area are not covered by light diffusers. Screw the bulb counterclockwise to remove and clockwise to install. (See Figure 7-10)

Control Board Removal (All Tall Units)

The control board is held in position by two sets of tabs behind the left side of the control panel. The two forward tabs position the LCD in the control panel window, while the other two tabs secure the middle of the control board. The control board is then shielded by a control enclosure and concealed by the light diffuser.

To access and remove the control board, first remove the light diffuser. Then, extract the screws securing the control enclosure to the ceiling of the compartment. Lower the back of the enclosure while pulling it toward the rear of the unit. Disconnect all electrical leads attached to the control board. Expand the two tabs at the middle of the control board outward while pulling the back of the board down slightly. Then, expand the two forward tabs outward that hold the LCD in position, and pull the control board down and toward the rear of the unit.(See Figures 7-11 & 7-12.)

Figure 7-8. Upper Light Diffuser Removal

Figure 7-9. Upper Light Diffuser Removal

Retaining Clip

“T” Slots

Figure 7-10. Light Bulb Removal

counterclockwise to remove

Figure 7-11. Control Board And Control Panel

Figure 7-12. Control Board Removal

Line-up Slots with Pegs

Ta b

Forward Tabs

Control Board

Page 74

Component Access/Removal

Integrated (

700-

2) Series

7-7

#3756780 - Revision D - July, 2005

Control Panel Assembly Removal (All Tall Units)

The control panel is held in place with two rows of screws. The front row of screws go through spacers that fit into key-hole slots at the front of the panel. The rear screws secure the assembly to the ceiling.

To access and remove the control panel, the light diffuser and control enclosure must be removed first.

NOTE: It is recommended but not necessary to remove

the control board in order to remove the control panel. If leaving the control board secured to the control panel, all electrical leads attached to the control board must be disconnected.

Then, extract the back screws and push the panel towards the rear of the unit to release the front screws from the key-hole slots, then lower the panel down and pull out. (See Figure 7-13)

Upper Evaporator Cover / Air Duct Removal (All Tall Units)

The bottom of the upper evaporator cover sets into a channel at the bottom of the upper compartment. At the top, screws hold the evaporator cover to the evaporator fan shroud.

To access and remove the evaporator cover, the light diffuser must first be removed. Then, extract the screws at the top of the evaporator cover, tilt the cover forward and lift out. (See Figure 7-14)

Upper Evaporator Fan Shroud Assembly Removal (All Tall Units)

The evaporator fan shroud assembly, which holds the upper compartment lighting components, is secured to the ceiling with five screws, two at the rear and three at the front. (See Figure 7-13)

To access and remove the evaporator fan shroud assembly, first remove the light diffuser and evaporator cover. Then, extract the five mounting screws which secure the fan shroud assembly to the ceiling of the compartment. Lower the assembly and disconnect the wiring for the lights from the wire harness. (See Figure

7-15)

Figure 7-13. Control Panel Removal

Mounting Screws

Key-Hole Slots

Control Panel

Figure 7-14. Upper Evaporator Cover Removal

Figure 7-15. Upper Evaporator Fan Shroud Assy

Evap Fan Shroud

Assembly

Disconnect Wiring

Screws

Page 75

Component Access/Removal

Integrated (

700-

2) Series

7-8

#3756780 - Revision D - July, 2005

Upper Compartment Evaporator Fan Assembly Removal (All Tall Units)

The upper evaporator fan assembly sets in a pocket in the ceiling of the upper compartment and is secured to the ceiling with screws.

To access and remove the evaporator fan assembly, first remove the light diffuser, evaporator cover, and evaporator fan shroud assembly. Then, disconnect the fan motor wire leads from the wire harness, and extract the mounting screws. (See Figure 7-16)

The evaporator fan blade is pressed onto the shaft of the fan motor and can be removed by simply pulling it away from the motor.

Upper Compartment Thermistor Removal (All Tall Units)

The upper compartment thermistor is located behind the evaporator cover, and is attached to the back wall with a screw.

To access and remove the upper compartment thermistor, first remove the light diffuser and evaporator cover. Then, disconnect the thermistor wire leads from the wire harness, and extract the screw which secures the thermistor to the rear wall. (See Figure 7-17)

Upper Evaporator Thermistor Removal (700TC/I-2, 700TR-2)

NOTE: There is no evaporator or evaporator thermistor

in the upper compartment of the 700TF/I-2 and 700TFI2V.

The upper evaporator thermistor is attached to the right side bracket of the evaporator with a screw.

To access and remove the upper evaporator thermistor, first remove the light diffuser and evaporator cover. Then, disconnect the thermistor wire leads from the wire harness, and extract the screw which secures the thermistor to the right evaporator bracket. (See Figure

7-17)

Figure 7-16. Upper Evap Fan Assy

Mounting Screws

Wire Connector

Figure 7-17. Upper Compartment

and Evaporator Thermistors

Upper Compartment Thermistor

Upper Evaporator Thermistor

Page 76

Component Access/Removal

Integrated (

700-

2) Series

7-9

#3756780 - Revision D - July, 2005

Drawer Closer Assembly Removal (All Tall Units)

The drawer closer assemblies are located on the right side wall, towards the front of the two drawer areas. Two screws secure each drawer closer to the wall.

To access and remove a drawer closer assembly, first remove the appropriate drawer. Then, extract the two screws that secure the drawer closer to the wall. (See

Figure 7-18)

Drawer Slide Assembly Removal (All Units)

There are four drawer slide assemblies in 700-2 Series units, two on each side wall. The drawer slide assemblies are attached to the side walls with Allen-head screws passing through the drawer slide bracket into blind threaded inserts.

To access and remove a drawer slide assembly, first remove the drawer. Then, extract the drawer slide mounting screws with a 5/32" Allen-head wrench, and pull the drawer slide assembly away from the wall.

(See Figure 7-19)

NOTE: The pins at the end of the drawer slides are

replaceable. Screw the pins counterclockwise to remove them. (See Figure 7-20)

Icemaker Assembly Removal (700TCI-2, 700TFI-2, 700TFI-2V)

The icemaker is attached to a support plate with three screws that pass up through the plate into the bottom of the icemaker. The ice level arm is also attached to the support plate using two P-clamps and two screws. The P-clamps fit around rods at the back of the ice level arm. Screws passing through the P-clamps secure them to the support plate at the rear. At the front, a connecting rod is used to attach the ice level arm to the icemaker shut-off arm. This whole assembly is attached to the evaporator cover with three mounting screws, two at the top and one at the bottom. (See

Figure 7-21)

To access and remove the icemaker assembly, first remove the bottom drawer. Then, extract the bottom icemaker mounting screw and the two top mounting screws. (See Figure 7-21) Lower the icemaker assembly down and disconnect the wire harness from the back left of the icemaker.

The icemaker can now be removed from the support plate by first sliding the connecting rod off of the shutoff arm, then extracting the three screws from the bottom of the icemaker.

Drawer Closer Assy

Figure 7-18. Drawer Closer Assembly Removal

Figure 7-19. Drawer Slide Assembly Removal

Drawer Slide Assy

Figure 7-20. Pin Replacement

Figure 7-21. Icemaker Assy, TCI-2, TFI-2, TFI-2V

Icemaker

Mounting Screw

Shut-off Arm

Connecting Rod

Page 77

Component Access/Removal

Integrated (

700-

2) Series

7-10

#3756780 - Revision D - July, 2005

Heat Exchanger Cover Removal (All Tall Units)

The heat exchanger cover is held in the back left corner of the lower compartment with two screws that go through the cover and into stand-offs. (See Figure 7-22)

To access and remove the heat exchanger cover, the two drawers will need to be removed first. Then, extract the two mounting screws and pull the cover from the unit.

Lower Evaporator Cover Assembly Removal (700TR-2 Only)

NOTE: The evaporator fan assembly is attached to the

lower evaporator cover assembly in the 700TR-2.

The lower evaporator cover assembly in the 700TR-2 is held in place with eight screws. Two screws on the left side are hidden by the heat-exchanger cover. Three screws on the right side secure the evaporator cover assembly to the switch enclosure and three screws at the top secure it to the ceiling of the lower compartment. (See Figure 7-23)

To access and remove the lower evaporator cover assembly, first remove the two drawers and the heat exchanger cover. Then, remove the two screws that were hidden by the heat exchanger cover. Extract the three screws at the top and the three screws on the right side. Pull the right top front of the evaporator cover assembly down slightly and disconnect the evaporator fan electrical leads. Now, pull the assembly through the upper drawer opening.

Lower Evaporator Fan Assembly Removal (700TR-2 Only)

NOTE: The evaporator fan assembly is attached to the

lower evaporator cover assembly in the 700TR-2.

The lower evaporator fan assembly in the 700TR-2 is held in place by two bolts passing through access holes in the evaporator fan shroud, then through the top flange of the evaporator cover and into well-nuts in the evaporator fan bracket.

To access and remove the lower evaporator fan assembly, first remove the two drawers, the heat exchanger cover and the lower evaporator cover assembly. Then, extract the two bolts from the well-nuts, through the access holes. (See Figure 7-24)

The evaporator fan blade is pressed onto the shaft of the fan motor and can be removed by simply pulling it away from the motor.

Heat Exchanger Cover

Figure 7-22. Heat Exchanger Cover Removal

Screw

Figure 7-23. Evaporator Cover Assy Removal, TR-2

Evaporator Cover Assembly

Screw

Screws

Screw

Figure 7-24. Evaporator Fan Assy Removal, TR-2

Evap Fan Assy

Bolts through Access Holes

Page 78

Component Access/Removal

Integrated (

700-

2) Series

7-11

#3756780 - Revision D - July, 2005

Lower Compartment Thermistor Removal (700TR-2 Only)

NOTE: The lower compartment thermistor in the

700TC/I-2 is attached inside the switch enclosure which is explained later in this section.

The lower compartment thermistor in the model 700TR2 is located behind the evaporator cover, and is attached to the back wall with a screw.

To access and remove the lower compartment thermistor, first remove the two drawers, the heat exchanger cover and the lower evaporator cover assembly. Then, disconnect the thermistor wire leads from the wire harness, and extract the screw which secures the thermistor to the rear wall. (See Figure 7-25)

Lower Evaporator Thermistor Removal (700TR-2 Only)

NOTE: The lower evaporator thermistor in the 700TC/I-

2, 700TF/I-2 and 700TFI-2V is attached to the top right side of the evaporator which is explained later in this section.

The lower evaporator thermistor in the 700TR-2 is attached to the right evaporator bracket with a screw.

To access and remove the lower evaporator thermistor, first remove the two drawers, the heat exchanger cover and the lower evaporator cover assembly. Then, disconnect the thermistor electrical leads and extract the screw securing the thermistor to the right evaporator bracket. (See Figure 7-25)

Lower Evaporator Cover Assembly Removal (700TC/I-2, 700TF/I-2, 700TF/I-2V)

The lower evaporator cover in the 700TC/I-2, 700TF/I-2 and 700TF/I-2V is held in place with four screws and one peg. Two screws on the left side are hidden by the heat-exchanger cover; two screws at the top secure the evaporator cover to the ceiling of the lower compartment; and a peg protruding from the bottom left side of the switch enclosure fits into a hole in the bottom right side of the evaporator cover. (See Figure 7-26)

To access and remove the lower evaporator cover, first remove the two drawers and the heat exchanger cover, as well as the icemaker in applicable models. Then, remove the two screws that were hidden by the heat exchanger cover. Extract the two screws at the top and pull the evaporator cover to the left to disengage the peg from the hole at the bottom right. Now, pull the assembly through the upper drawer opening.

Figure 7-26.

Evap Cover Removal, TC/I-2, TF/I-2 & TF/I-2V

Evaporator Cover

Screw

Screws

Screw

Peg (Not Shown)

Figure 7-25. Lower Thermistors, TR-2

Evaporator Thermistor

Compartment Thermistor

Page 79

Component Access/Removal

Integrated (

700-

2) Series

7-12

#3756780 - Revision D - July, 2005

Drain Trough Heater Removal (700TC/I-2, 700TF/I-2, 700TF/I-2V)

The drain trough heater in the lower compartment of the 700TC/I-2, 700TF/I-2 and 700TFI-2V is positioned just above the drain trough and held in place by three heater brackets.

To access and remove the drain trough heater, first remove the two drawers, the heat exchanger cover and the the evaporator cover. Then, pull the heater up from the notches in the two side brackets, and down from the notches in the middle bracket. Pull the heater to the left until the electrical connections come out from behind the switch enclosure, then disconnect the electrical leads. (See Figure 7-27)

Lower Evaporator Fan Shroud Removal (700TC/I-2)

The lower evaporator fan shroud in the 700TC/I-2 is attached to the front flanges of the evaporator fan bracket assembly with two screws.

To access and remove the lower evaporator fan shroud, first remove the two drawers, the heat exchanger cover and the evaporator cover. Then, extract the two screws that pass through the fan shroud into the evaporator fan bracket. (See Figure 7-28)

Lower Evaporator Fan Assembly Removal (700TC/I-2)

The lower evaporator fan assembly in the 700TC/I-2 is attached to the upper back wall of the lower compartment with two screws.

To access and remove the lower evaporator fan assembly, first remove the two drawers, the heat exchanger cover, the evaporator cover and the evaporator fan shroud. Then, reach through the access holes in the fan bracket assembly and extract the two screws that secure the assembly to the back wall. (See Figure 7-

29)

Figure 7-29. Fan Assy Removal, TC/I-2

Evaporator Fan Assembly

Figure 7-28. Evap Fan Shroud, TC/I-2

Screws

Evaporator Fan Shroud

Figure 7-27. Drain Trough Htr, TC/I-2, TF/I-2, TC/I-2V

Heater Brackets

Electrical Connections

Drain Trough Heater

2 1

Page 80

Component Access/Removal

Integrated (

700-

2) Series

7-13

#3756780 - Revision D - July, 2005

Figure 7-30. Dfrst Terminator, TC/I-2, TF/I-2, TC/I-2V

Figure 7-31. Defrost Heater, TC/I-2, TF/I-2, TC/I-2V

Defrost Terminator Removal (700TC/I-2, 700TF/I-2, 700TF/I-2V)

The defrost terminator in the 700TC/I-2, 700TF/I-2 and 700TFI-2V is attached to the second tubing pass from the top of the evaporator.

To access and remove the defrost terminator, first remove the two drawers, the heat exchanger cover, the evaporator cover and the evaporator fan shroud. Then, remove the screws at the top of the evaporator and pull the top of the evaporator forward slightly. Disconnect the defrost terminator electrical leads and pull the terminator towards the back of the unit so that the clip disengages from the evaporator tubing. (See Figure 7-30)

NOTE: When reinstalling the defrost terminator, it must

be attached to the second tubing pass of the evaporator. Installing the terminator on the first pass will place it too close to the defrost heater, causing shortened defrost times which will lead to incomplete defrost.

Defrost Heater Removal (700TC/I-2, 700TF/I-2, 700TF/I-2V)

The defrost heater in the 700TC/I-2, 700TF/I-2 and 700TFI-2V is pressed into the evaporator fins at the front. Heater clips are then hooked from one evaporator tube to another, over the heater.

To access and remove the defrost heater, first remove the two drawers, the heat exchanger cover, the evaporator cover and the evaporator fan shroud. Then, disconnect the heater electrical leads. Grab the return bend of the heater clips with a needle-nose pliers and pull that end of the clip away from the evaporator. Unhook the other end of the heater clip from the evaporator tubing. Cut the heater wire near the electrical connector and pull the heater from the evaporator.

(See Figure 7-31)

NOTE: When installing replacement heater, do not place

heater clips over top heater pass. Doing so will interfere with evaporator fan shroud.

Switch Enclosure Assembly Removal (All Tall Units)

The switch enclosure assembly is held in the back right corner of the lower compartment with screws, one at the top and bottom left corners, and depending on the model, one or two along the right side.

To access and remove the switch enclosure assembly, first remove the two drawers, the heat exchanger cover, the the evaporator cover, as well as the drain trough heater on applicable models. Then, disconnect all electrical leads from at the top left side of the enclosure. On applicable models, the fill tube and fill tube heater assembly will also need to be pulled from the right wall. Extract the switch enclosure mounting screws and pull the assembly from the back wall. (See Figure 7-32)

Defrost Heater

Pull heater clips off with pliers

Figure 7-32. Switch Enclosure Removal

Extract Screws

Pull fill tube and heater from wall

Disconnect electrical leads

2 1

Page 81

Component Access/Removal

Integrated (

700-

2) Series

7-14

#3756780 - Revision D - July, 2005

Lower Evaporator Thermistor Removal (700TC/I-2, 700TF/I-2, 700TF/I-2V)

In the 700TC/I-2, 700TF/I-2 and 700TFI-2V, a screw secures the lower evaporator thermistor to the top right side of the evaporator, just behind the the top tubing passes.

To access and remove the lower evaporator thermistor, first remove the two drawers, the heat exchanger cover, the lower evaporator cover and the switch enclosure. Then, disconnect the thermistor electrical leads and extract the screw securing it to the right side of the evaporator. (See Figure 7-33)

Lower Compartment Thermistor Removal (700TC/I-2, 700TR-2)

The Lower compartment thermistor in the models 700TC/I-2 and 700TR-2 is attached to the inside of the switch enclosure with a screw.

NOTE: There is no lower compartment thermistor in

the models 700TF/I-2 and 700TF/I-2V.

To access and remove the lower compartment thermistor, first remove the two drawers, the heat exchanger cover, the lower evaporator cover and the switch enclosure. Then, extract the screw from inside the switch enclosure and pull the thermistor out through the grommet. (See Figure 7-34)

Fill Tube Heater Removal (700TC/I-2, 700TF/I-2, 700TF/I-2V)

The fill tube heater is attached to the fill tube with a cable tie. The heater electrical connections are behind the switch enclosure.

To access and remove the fill tube heater, first remove the two drawers, the heat exchanger cover, the lower evaporator cover and the switch enclosure. Then, disconnect the heater’s electrical leads. Push the wire grommet from the hole in the switch enclosure and pull the heater wiring through the slot in the side of the switch enclosure. (See Figure 7-35) Cut the cable tie to remove the heater from the fill tube.

Figure 7-33. Evaporator Thermistor, TC/I-2 & TF/I-2

Evaporator Thermistor

Figure 7-34. Lower Compartment Thermistor,

TC/I-2 & TR-2

Figure 7-35. Fill Tube Heater, TC/I-2, TF/I-2, TC/I-2V

Thermistor

Screw

Grommet

Push grommet from hole

Fill Tube & Heater

Pull wires through slot

Page 82

Component Access/Removal

Integrated (

700-

2) Series

7-15

#3756780 - Revision D - July, 2005

Figure 7-36. Lower Compartment Switch Removal

Lower Compartment Light Switch / Fan Switch / Icemaker Switch Removal (All Tall Units)

The light switch, fan switch and the icemaker switch in the lower section of all tall units are mounted to the switch enclosure. The switches are held in place by tabs on the sides of the switches.

To access and remove a switch, first remove the two drawers, the heat exchanger cover, the lower evaporator cover and the switch enclosure. Then, unplug the electrical leads from the switch being removed. Depress the tab on the side of the switch and push the switch out from the enclosure. (See Figure 7-36)

700-2 TALL UNIT COMPRESSOR AREA ELECTRICAL AND MECHANICAL COMPONENTS

Icemaker Water Valve Removal (700TCI-2, 700TFI-2, 700TFI-2V)

The icemaker water valve assembly is attached to the valve bracket, located on the right side of the compressor area, behind a fiberglass air baffle. A screw passing through a key-hole slot in the valve assembly secures the valve to the valve bracket.

NOTE: It is not

necessary to remove the compressor

tray to access the water valve assembly.

To access and remove the icemaker water valve, first turn off the water supply to the icemaker. Then, remove the kickplate/grille. With a wrench, disconnect the brass compression fitting which holds the water supply line to the water inlet stub. Push the fiberglass air baffle out of the way. With a long Phillips screwdriver, loosen the screw that secures the valve assembly to the valve bracket. Grab the water inlet stub and lift up so that the head of the screw lines up with the large section of the key-hole slot. Pull the valve assembly forward until the screw clears the key-hole slot, then lower the assembly down until the valve body clears the valve bracket and pull the assembly out from the compressor area. (See Figure 7-37) Now, unplug the electrical leads, and disconnect the outlet tube plastic compression fitting with a wrench. (See Figure 7-38)

Depress tabs on switch and push from the enclosure

Figure 7-37. Water Valve Removal, TC/I-2, TF/I-2

Figure 7-38. Disconnect Water Valve, TC/I-2, TF/I-2

Key-Hole Slot

Water Valve

Inlet Stub

Compression Fittings

Outlet Tube

Electrical Leads

Screw

Water Valve

Page 83

Component Access/Removal

Integrated (

700-

2) Series

7-16

#3756780 - Revision D - July, 2005

Condenser Fan Assembly Removal (All Tall Units Except 700TF/I-2V)

The condenser fan shroud sets on top of two pegs protruding from the unit tray and two screws at the top of the shroud secure it to the condenser. The condenser fan is mounted to the condenser fan shroud. Three fan mounting brackets are hooked into grommeted holes in the fan shroud. Screws passing through these brackets secure the fan motor to the brackets. The condenser fan blade is held onto the fan motor shaft with a nut.

To access and remove the condenser fan assembly, the kickplate/grille will need to be removed first and the unit tray will need to be slid out. To slide the unit tray out, extract the two screws that secure the tray to the unit, located at the front right and left corners. Grab the front flange of the tray and pull forward. (See Figure 7-39)

NOTE: It may be necessary to disconnect the com-

pressor electrical leads in order to pull the tray out far enough to access the condenser fan assembly.

Begin removing the condenser fan assembly by disconnecting the condenser fan motor electrical leads. Extract the two screws at the top of the fan shroud and lift the shroud with motor up off of the pegs at the bottom. (See Figure 7-40)

To remove the condenser fan from the shroud, extract the three screws securing the motor to the brackets. The brackets will unhook from the grommeted holes in the condenser fan shroud after the screws are removed. (See Figure 7-41)

To remove the fan blade from the fan motor, grab the blade and motor while turning the nut counterclockwise. Then pull the blade from the motor shaft. (See Figure

7-41)

Figure 7-40. Condenser Fan Shroud Removal

Figure 7-41. Condenser Fan Assembly

Figure 7-39. Sliding Unit Tray Out

Screw

Condenser Fan Shroud

Fan Electrical Leads

Screw

Condenser Fan Shroud

Motor

Neoprene Silencer

Blade

Flat Nut

Bracket (1 of 3)

Screw (1 of 3)

Page 84

Component Access/Removal

Integrated (

700-

2) Series

7-17

#3756780 - Revision D - July, 2005

Condenser Fan Assembly Removal (700TF/I-2V)

The condenser fan shroud sets on top of two pegs protruding from the unit tray and two screws at the top of the shroud secure it to the condenser. The condenser fan is mounted to the fan bracket, which is then attached to the shroud with rivets. The condenser fan blade is held onto the fan motor shaft with a nut.

NOTE: It may be necessary to disconnect the com-

pressor electrical leads in order to pull the tray out far enough to access the condenser fan assembly.

To remove the condenser fan motor from the fan bracket, first remove the fan blade by turning the nut counterclockwise, then pulling the blade from the motor shaft. Now, extract the two bolts that pass through the fan bracket and motor into nuts on the back side of the motor. (See Figure 7-44)

Figure 7-43. Condenser Fan Shroud Removal

Figure 7-44. Condenser Fan Assembly

Figure 7-42. Sliding Unit Tray Out

Screw

Condenser Fan Shroud

Fan Electrical Leads

Screw

Condenser Fan Shroud

Motor

Neoprene Silencer

Blade

Flat Nut

Fan Bracket

Screws

Nuts

Page 85

Component Access/Removal

Integrated (

700-

2) Series

7-18

#3756780 - Revision D - July, 2005

Compressor Controller Removal (700TF/I-2V)

Mounting holes in flanges on each side of the compressor controller fit over threaded studs that are press fit to the unit tray. A grounding terminal is placed over the right stud, then washers and nuts are tightened down onto the studs to secure the compressor controller to the unit tray.

To access and remove the compressor controller, the kickplate/grille must be removed first and the unit tray slid out. To slide the unit tray out, extract the two screws that secure the tray to the unit, located at the front right and left corners. Grab the front flange of the tray and pull forward. (See Figure 7-45)

NOTE: It may be necessary to disconnect the com-

pressor electrical leads in order to pull the tray out far enough to access the compressor controller.

Begin removing the compressor controller by disconnecting the electrical leads. Extract the two nuts and washers from the threaded studs and lift the controller off of the unit tray. (See Figure 7-46)

CN03

CN08

CN02

CN05

Figure 7-46. Compressor Controller Removal

Figure 7-45. Sliding Unit Tray Out

Screw

Compressor

Controller

Compressor

Controller

Nut

Serial

Communication

Electrical

Leads

Ground at Controller

Washer

Power to

Controller

Ground at Compressor

Power to

Compressor

CN03

CN08

CN02

CN05

Page 86

Component Access/Removal

Integrated (

700-

2) Series

7-19

#3756780 - Revision D - July, 2005

700-2 TALL UNIT SEALED SYSTEM COMPONENTS

Upper Refrigerator Compartment Evaporator Removal (700TCI-2, 700TR-2)

The upper refrigerator evaporator in the model 700TC/I-2 and 700TR-2 is concealed by the evaporator cover and is attached to the back wall with screws.

NOTE: Before attempting to remove the evaporator,

evacuate the refrigerant from the sealed system.

To access and remove the upper evaporator, first remove the light diffuser and evaporator cover. Then, extract the screws securing the thermistor to the evaporator and the evaporator to the back wall. With a tube cutter, cut the inlet tube approximately one inch from the end and cut the outlet tube approximately two inches from the end. (See Figure 7-47)

NOTE: Sweating the joints apart is not recommended

as this may induce moisture into the sealed system and could cause a solder restriction in the capillary tube.

NOTE: When installing a new evaporator, be sure to

thoroughly clean the tubing before brazing. After brazing and inspecting the joint for leaks, it is recommended to apply an acrylic-based paint to the joints to protect the exposed metals from oxidation.

Lower Compartment Evaporator Removal (All Tall Units)

The lower evaporator in the tall units is concealed by the evaporator cover and is attached to the back wall with screws.

NOTE: Before attempting to remove the evaporator,

evacuate the refrigerant from the sealed system.

To access and remove the lower evaporator, first remove the heat exchanger cover, evaporator cover and switch enclosure. In the model 700TC/I-2, the evaporator fan shroud will also need to be removed. (If reusing the

existing defrost heater, defrost terminator and evaporator thermistor, they can be removed from the evaporator after it is removed from the unit.) Then, extract the

screws securing the evaporator to the back wall. With a tube cutter, cut the inlet tube approximately one inch from the end and cut the outlet tube approximately two inches from the end. (See Figure 7-48)

NOTE: Sweating the joints apart is not recommended

as this may induce moisture into the sealed system and could cause a solder restriction in the capillary tube.

Figure 7-48. Lower Evaporator Removal

Figure 7-47. Upper Evap Removal, TC/I-2 & TR-2

Remove Screws

Cut here

Remove Screws

Cut here

Page 87

Component Access/Removal

Integrated (

700-

2) Series

7-20

#3756780 - Revision D - July, 2005

High-Side Filter-Drier Removal (All Tall Units)

The high-side filter-driers are located in the center of the unit tray, behind the condenser and are attached to the drier bracket with a cable tie.

NOTE: Before attempting to remove a filter drier, evac-

uate the refrigerant from the sealed system.

To access and remove a high-side filter-drier, the kickplate/grille will need to be removed first and the unit tray will need to be slid out. To slide the unit tray out, extract the two screws that secure the tray to the unit, located at the front right and left corners. Grab the front flange of the tray and pull forward. (See Figure 7-49)

NOTE: It may be necessary to disconnect the com-

pressor electrical leads in order to pull the tray out far enough to access the filter-driers.

Begin removing the filter-drier by cutting the cable tie which secures the filter-driers to the drier bracket. With the edge of a file, score a line around the capillary tube approximately one inch from the filter-drier outlet, then fatigue the capillary tube at this line until it separates. With a tube cutter, cut the inlet tube approximately one inch from the filter-drier. (See Figure 7-50)

NOTE: Sweating the joints apart is not recommended

as this may induce moisture into the sealed system and could cause a solder restriction in the capillary tube.

NOTE: Check the end of the remaining capillary tube

for internal burrs. If burrs exist, re-score a line around the capillary tube (approximately one inch from the end) and fatigue the capillary tube at this new line until it separates.

NOTE: When installing the replacement filter-drier,

insert the capillary tube until it touches the screen, then pull the capillary tube approximately 3/8” away from the screen before brazing. (See Figure 7-51) When installing a new filter-drier, be sure to thoroughly clean the tubing before brazing.

Figure 7-49. Sliding Unit Tray Out

Screw

Figure 7-50. Filter-Drier Removal

Figure 7-51. Filter-Drier Cut-Away View

Cut cable tie

Score a line 1” from drier

Cut 1” from drier

Capillary Tube

Screen inside Filter-Drier

3/8"

Page 88

Component Access/Removal

Integrated (

700-

2) Series

7-21

#3756780 - Revision D - July, 2005

Compressor Removal (All Tall Units)

The compressors have four rubber compressor grommets inserted into their base. Cylindrical metal spacers are placed over threaded studs that are press fit to the unit tray. The compressor grommets fit over the spacers and a washer sets on top of the grommet and spacer. A nut is then installed on the threaded stud and tightened down on the washer and spacer.

NOTE: Before attempting to remove a compressor,

evacuate the refrigerant from the sealed system.

To access and remove a compressor, the kickplate/grille will need to be removed first and the unit tray will need to be slid out. To slide the unit tray out, extract the two screws that secure the tray to the unit, located at the front right and left corners. Grab the front flange of the tray and pull forward. (See Figure 7-49)

After the tray is slid out, use a flat-blade screwdriver to remove the compressor electrical cover, then disconnect the the electrical leads from the compressor. (See

Figure 7-52)

Begin removing the compressor by cutting the inlet and outlet tubing with a tube cutter, approximately one inch from the compressor ports. Extract the nuts and washers from the threaded studs, then lift the compressor off of the studs. (See Figure 7-53)

NOTE: Sweating the joints apart is not recommended

as this may induce moisture into the sealed system.

NOTE: The high-side filter-drier must be replaced

whenever servicing the sealed system.

NOTE: When installing a compressor, be sure to thor-

oughly clean the tubing before brazing.

Figure 7-52. Removing Compressor Electrical Cap

Figure 7-53. Compressor Removal

Pry up with screwdriver

Cut here

Compressor

Remove nuts and washers

Page 89

Component Access/Removal

Integrated (

700-

2) Series

7-22

#3756780 - Revision D - July, 2005

Condenser Removal (All Tall Units)

The condenser is secured to the unit tray by four rivets that pass up through the unit tray into the condenser side brackets.

NOTE: Before attempting to remove the condenser,

evacuate the refrigerant from the sealed system(s).

To access the condenser, the kickplate/grille will need to be removed first and the unit tray will need to be slid out. To slide the unit tray out, extract the two screws that secure the tray to the unit, located at the front right and left corners. Grab the front flange of the tray and pull forward. (See Figure 7-54)

NOTE: It will be necessary to disconnect the compres-

sor electrical leads in order to pull the tray out far enough to remove the condenser.

Begin removing the condenser by cutting the inlet and outlet tubes to and from the condenser, approximately one inch from the weld joints. Then, prop the front of the unit tray up and drill out the four rivets securing the condenser to the tray. (See Figure 7-55)

NOTE: Sweating the joints apart is not recommended

as this may induce moisture into the sealed system.

NOTE: The high-side filter-drier(s) must be replaced

whenever replacing the condenser.

NOTE: To reattach the condenser to the unit tray, use

#10-24 X 3/8” bolts (#6200020) passing up through the unit tray and condenser brackets with #10-24 Hex nuts (#6150030) tightened down on top.

NOTE: When installing the replacement condenser, be

sure to thoroughly clean the tubing before brazing.

Figure 7-54. Sliding Unit Tray Out

Screw

Figure 7-55. Condenser Removal

Tilt front of unit tray up and drill out the four rivets. (2 each side)

Condenser

Page 90

Component Access/Removal

Integrated (

700-

2) Series

7-23

#3756780 - Revision D - July, 2005

Upper Compartment Heat Exchanger Removal (700TC/I-2, 700TR-2)

The upper compartment heat exchanger in the models 700TC/I-2 and 700TR-2 passes down through a hole in the back left corner of the mullion. The heat exchanger then passes down through the lower compartment behind the heat exchanger cover and through a hole in the back left corner of the lower compartment floor.

NOTE: Before attempting to remove a heat exchanger,

evacuate the refrigerant from the sealed system.

To access and remove the upper compartment heat exchanger, the following components must first be removed: the upper light diffuser, upper evaporator cover, both drawer assemblies, heat exchanger cover in the lower compartment and the kickplate/grille. The unit tray will also need to be slid out.

NOTE: It will be necessary to disconnect the compres-

sor electrical leads in order to pull the tray out far enough to access and remove the heat exchanger.

Begin removing the heat exchanger by cutting the inlet and outlet tubes at the evaporator. (See Figure 7-56) Cut the suction line approximately two inches from the compressor. (See Figure 7-57) Since the filter-drier will be replaced at the same time, cut the drier inlet tube approximately one inch from the drier, leaving the capillary tube attached. (See Figure 7-58) The heat exchanger will be scrapped, so use a tin snips or similar tool to cut the heat exchanger near the hole in the mullion and the hole in the floor of the lower compartment. Pull the pieces of the heat exchanger out and clear the Hot-Melt away from the holes.

NOTE: To avoid damaging the unit from the brazing

torch flame, remove the evaporator from the compartment and attach the new heat exchanger to the evaporator outside of the unit.

NOTE: Applying dish soap on the tubing insulation of

the heat exchanger and around the holes in the mullion and lower compartment floor, will assist in working the heat exchanger through the holes.

NOTE: When installing the replacement heat exchang-

er, be sure to thoroughly clean the tubing before brazing.

NOTE: Apply a bead of silicone around the heat

exchanger where it passes through the holes in the mullion and lower compartment.

Figure 7-56. Cut Inlet and Outlet at Evaporator

Cut here

Figure 7-57. Cut Suction line at compressor

Cut here

Compressor

Figure 7-58. Cut Inlet to Filter-Drier

Cut cable tie

Leave capillary tube attached to drier

Cut 1” from drier

Heat Exchanger

Hole through mullion

Page 91

Component Access/Removal

Integrated (

700-

2) Series

7-24

#3756780 - Revision D - July, 2005

Lower Compartment Heat Exchanger Removal (All Tall Units)

The lower compartment heat exchanger is behind the switch enclosure and passes down through a hole in the back right corner of the lower compartment floor.

NOTE: Before attempting to remove a heat exchanger,

evacuate the refrigerant from the sealed system.

To access and remove the lower compartment heat exchanger, the following components must first be removed: both drawer assemblies, the heat exchanger cover, lower evaporator cover, switch enclosure and the kickplate/grille. The unit tray will also need to be slid out.

NOTE: It will be necessary to disconnect the compres-

sor electrical leads in order to pull the tray out far enough to access and remove the heat exchanger.

Begin removing the heat exchanger by cutting the inlet and outlet tubes at the evaporator. (See Figure 7-59) Cut the suction line approximately two inches from the compressor. (See Figure 7-60) Since the filter-drier will be replaced at the same time, cut the drier inlet tube approximately one inch from the drier, leaving the capillary tube attached. (See Figure 7-61) The heat exchanger will be scrapped, so use a tin snips or similar tool to cut the heat exchanger near the hole in the floor of the lower compartment. Pull the pieces of the heat exchanger out and clear the Hot-Melt away from the hole.

NOTE: To avoid damaging the unit from the brazing

torch flame, remove the evaporator from the compartment and attach the new heat exchanger to the evaporator outside of the unit.

NOTE: Applying dish soap on the tubing insulation of

the heat exchanger and around the holes in the lower compartment floor will assist in working the heat exchanger through the hole.

NOTE: When installing the replacement heat exchang-

er, be sure to thoroughly clean the tubing before brazing.

NOTE: Apply a bead of silicone around the heat

exchanger where it passes through the hole in the lower compartment.

Figure 7-59. Cut Inlet and Outlet at Evaporator

Cut here

Hole through floor

Heat Exchanger

Figure 7-60. Cut Suction line at compressor

Cut here

Compressor

Figure 7-61. Cut Inlet at Filter-Drier

Cut cable tie

Leave capillary tube attached to drier

Cut 1” from drier

Page 92

Component Access/Removal

Integrated (

700-

2) Series

7-25

#3756780 - Revision D - July, 2005

700-2 BASE UNIT EXTERIOR COSMETIC AND MECHANICAL COMPONENTS

Kickplate/Grille Removal (All Base Units)

The kickplate/grille is attached by four screws passing through the kickplate into adjustable kickplate brackets.

NOTE: Because drawer panels may extend down in

front of the kickplate/grille, it may be necessary to remove the bottom drawer to gain access.

To remove the kickplate/grille, extract the four screws (two on each side) and pull the kickplate grille forward.

(See Figure 7-62)

Drawer Assembly Removal (All Base Units)

The top drawer assembly has a control cable that must be disconnected during drawer removal. To remove the top drawer, pull the drawer open six inches to ten inches, then lift the front of the drawer up and off of the pins at the end of the drawer slides, then push the slides back in. (See Figure 7-63) Carefully place the drawer assembly face down directly in front of the unit. Disconnect the control cable at the interior left rear of the unit by turning the the collar on the connector counterclockwise and unplugging the pins from the socket.

(See Figure 7-64)

To remove the bottom drawer assembly, pull the drawer open and lift the front of the drawer up and off of the pins at the end of the drawer slides. Pull the drawer assembly forward and out. Then, push the telescoping drawer slide assemblies back in. (See Figure 7-63)

Figure 7-62. Kickplate/Grille Removal

Kickplate/Grille

Figure 7-63. Drawer Assembly Removal

Hole in Channel

Drawer Slide

Drawer Assembly

Figure 7-64. Disconnecting Control Cable

Turn collar counterclockwise to disconnect

Page 93

Component Access/Removal

Integrated (

700-

2) Series

7-26

#3756780 - Revision D - July, 2005

Side Trim Molding Strip Removal (All Base Units)

The side trim molding strips are held in place by two unit-to-cabinet brackets which are attached to the sides of the cabinet.

NOTE: Removing the drawers first will make this task

easier.

To remove the side trim molding strips, place a straightblade screwdriver in the channel at the bottom of the molding. (See Figure 7-65) Gently pull the molding forward until the face-frame edge of the molding is accessible. Place another straight-blade screwdriver under the face-frame edge and gently work the molding away from the face-frame and out of the two unit-to-cabinet brackets. (See Figure 7-65)

Drawer Gasket Removal (All Base Units)

The drawer gaskets are pressed into retaining channels that are molded into the drawer liners.

NOTE: Drawer assemblies must be removed from the

unit in order to remove and/or install gaskets.

To remove a drawer gasket, simply pull the gasket from the retaining channel. (See Figure 7-66)

Figure 7-65. Side Molding Strip Removal

Side

Molding

Strip

Gasket Seat

Unit to Cabinet Bracket

Figure 7-66. Gasket Removal

Drawer Gasket

Channel

Page 94

Component Access/Removal

Integrated (

700-

2) Series

7-27

#3756780 - Revision D - July, 2005

700-2 BASE UNIT INTERIOR COSMETIC, MECHANICAL AND ELECTRICAL COMPONENTS

Control Panel Assembly Removal (All Base Units)

The control panel assembly is attached to the inside of the top drawer assembly with three screws.

To remove the control panel assembly, extract the three screws and tilt the control panel back towards the drawer tub. (See Figure 7-67) Now, disconnect the control cable from the control panel assembly and lift the control panel assembly up and out.

Control Cable Removal (All Base Units)

One end of the control cable is attached at the interior left rear of the upper drawer compartment. The cable is routed through a wire channel that is stuck to the bottom of the upper drawer tub, and then up through a channel in the drawer liner. The other end of the control cable is attached to the control panel.

To remove the control cable, the upper drawer assembly must be extracted and the control panel must be removed first. Then, extract the screw and P-clamp from the top of the drawer assembly. Remove the wire channel from the bottom of the drawer tub, which is held in place with double-stick tape, and pull the cable down through the channel in the drawer liner. (See

Figure 7-68)

Lighting Removal (All Base Units)

The base units have two light bulbs, one in the ceiling of the top drawer area, and one at the bottom of the divider between the two drawers. (See Figure 7-69)

The light socket is encased in rubber and a rubber flange at the back of the socket holds it in the light socket bracket. (See Figure 7-69)

To replace a light bulb, screw the bulb counterclockwise to remove it and clockwise to install it.

To remove the light socket, pull it from the bracket and disconnect the electrical leads.

Figure 7-67. Control Panel Assy Removal

Control Panel Assy

Screws

Figure 7-68. Control Cable Removal

1. Remove

channel from bottom of drawer tub

2. Pull control cable out of channel in door liner

Figure 7-69. Light Bulb and Socket

Light Socket

Light Bulb

Bracket

Page 95

Component Access/Removal

Integrated (

700-

2) Series

7-28

#3756780 - Revision D - July, 2005

Mullion Divider Assembly Removal (700BR-2 Only)

The mullion divider in the 700BR-2 sets on top of two divider supports at the back and the mullion between the two drawer areas at the front. A gasket around the top edge of the divider keeps the divider in place by pressing tight to the front, back and sides of the compartment.

To remove the mullion divider, reach into the lower compartment and push the divider upwards. (See Figure 7-

70)

Mullion Divider Supports Removal (700BR-2 Only)

The two mullion divider supports in the 700BR-2 are attached to each side wall at the back of the compartment with two screws each.

To remove the two divider supports, the drawers and the mullion divider assembly will need to be removed first. Then, extract the screws from the supports and pull the supports towards the front of the unit. (Not shown)

Drawer Closer Assembly Removal (All Base Units)

The drawer closer assemblies are located on the right side wall, towards the back of the compartment. Two screws secure each drawer closer to the wall.

To access and remove a drawer closer assembly, first remove the appropriate drawer. Then, extract the two screws that secure the drawer closer to the wall and pull the drawer closer assembly from the wall. (See

Figure 7-71)

Drawer Slide Assembly Removal (All Base Units)

To remove a drawer slide assembly, first remove the drawer. Then, extract the drawer slide mounting screws with a 5/32" Allen-head wrench, and pull the drawer slide assembly away from the wall. (See Figure 7-72)

NOTE: The pins at the end of the drawer slides are

replaceable. Screw the pins counterclockwise to remove them. (See Figure 7-20 earlier in this section)

Figure 7-70. Mullion Divider Removal, BR-2

Push divider upwards

Figure 7-71. Drawer Closer Assembly Removal

Figure 7-72. Drawer Slide Assembly Removal

Drawer Slide Assy

Drawer Closer Assy

Mullion Divider

Page 96

Component Access/Removal

Integrated (

700-

2) Series

7-29

#3756780 - Revision D - July, 2005

Reed Switch & Compartment Thermistor Removal (All Base Units)

The Reed Switches control the compartment lighting and evaporator fan. The upper Reed Switch in the 700BR-2 and 700BF-2, and the lower Reed Switch in the 700BR-2 also contain the compartment thermistor.

(See Figure 7-73)

NOTE: If the compartment thermistor is defective, the

complete Reed switch assembly must be replaced.

The Reed switches are attached to the evaporator cover with one screw each.

To remove a Reed switch, extract the screw. Lean the top of the Reed switch forward and disconnect the electrical leads from the back side, then pull the Reed switch out. (See Figure 7-74)

NOTE: When reinstalling a Reed switch, plug in the

electrical leads. Place the bottom flange of the switch housing into the opening in the evaporator cover. Then, rotate the top back and insert the screw.

Icemaker Assembly and Fill Tube Heater Removal (700BFI-2 Only)

The icemaker in the 700BFI-2 is attached to a support plate with three screws that pass up through the plate into the bottom of the icemaker. The ice level arm is also attached to the support plate using two P-clamps and two screws. The P-clamps fit around rods at the back of the ice level arm. Screws passing through the P-clamps secure them to the support plate at the rear. At the front, a connecting rod is used to attach the ice level arm to the icemaker shut-off arm. Two screws at the top of the icemaker assembly and one screw at the bottom pass through the back air duct into screw grommet/stand-offs to hold the assembly in place. (See

Figure 7-75)

Remove the bottom drawer to gain access to the icemaker assembly. (Removing the top drawer is not nec- essary, but will make this task easier.) Extract the bottom icemaker mounting screw and the two top mounting screws (See Figure 7-75). Lower the assembly down and disconnect the wire harness from the right side wall. Pull the icemaker with the fill tube heater/ice maker harness out of the unit. (See Figure 7-75)

The icemaker can now be removed from the support plate by first sliding the connecting rod off of the shutoff arm, then extracting the three screws from the bottom of the icemaker.

The fill tube heater can be removed from the fill tube by cutting the cable tie which holds the heater to the tube.

Reed Switch Assembly with Compartment Thermistor

Thermistor

Figure 7-73. Reed Switch with Thermistor

Figure 7-74. Reed Switch Assembly Removal

Reed Switch Assembly

Screw

Figure 7-75. Icemaker Assembly, BFI-2

Icemaker

Mounting Screw

Shut-off Arm

Connecting Rod

Fill Tube & Heater

Page 97

Component Access/Removal

Integrated (

700-

2) Series

7-30

#3756780 - Revision D - July, 2005

Sump Cover Assembly Removal (All Base Units)

The front of the sump cover is held in place with three screws that pass through the cover and into the floor of the unit. At the rear of the sump cover, three screws pass through the cover into a flange at the bottom of the back duct.

To access the sump cover, remove the bottom drawer and the bottom drawer closer. On the 700BFI-2, the icemaker will also need to be removed. (Removing the

top drawer is not necessary, but will make this task easier.)

Remove the sump cover by extracting the three screws at the front of the sump cover and the three screws at the back. (See Figure 7-76) Slide the sump cover forward and lift up.

Evaporator Thermistor Removal (All Base Units)

The evaporator thermistor is fastened by cable ties to a return elbow of the evaporator, on the right side.

To access the evaporator thermistor, remove the bottom drawer, bottom drawer closer and the sump cover.

(Removing the top drawer is not necessary, but will make this task easier.) Then, disconnect the thermistor

electrical leads. Cut the cable ties which hold the thermistor to the evaporator and lift the thermistor out of the sump area. (See Figure 7-77)

NOTE: You may see a Y-harness between the thermis-

tor electrical connections, with wires exiting through the heat exchanger hole in the sump. This is for factory test purposes and it can be removed or bypassed.

Defrost Terminator Removal (700BF/I-2 Only)

The defrost terminator in the 700BF/I-2 is attached to a return elbow of the evaporator, on the right side.

To access the defrost terminator, remove the bottom drawer, bottom drawer closer, icemaker and the sump cover. (Removing the top drawer is not necessary, but will make this task easier.) Then, disconnect the terminator electrical leads. Disengage the terminator clip from the tubing and lift the terminator out of the sump area. (See Figure 7-78)

NOTE: When reinstalling the defrost terminator, it must

be attached to the the same elbow it was removed from. Failure to do so could cause shortened defrost times which will lead to incomplete defrost.

Figure 7-76. Sump Cover Removal

Remove six screws

Sump Cover

Figure 7-77. Evaporator Thermistor Removal

Figure 7-78. Defrost Terminator Removal, BF/I-2

Evaporator Thermistor

Thermistor Electrical Leads

Defrost Terminator

Terminator Electrical Leads

Page 98

Component Access/Removal

Integrated (

700-

2) Series

7-31

#3756780 - Revision D - July, 2005

Defrost Heater Removal (700BF/I-2 Only)

The defrost heater in the 700BF/I-2 is pressed into the evaporator fins at the front. Heater clips are then hooked from one evaporator tube to another, over the heater.

To access and remove the defrost heater, first remove the bottom drawer, bottom drawer closer, icemaker and the sump cover. (Removing the top drawer is not nec- essary, but will make this task easier.) With a needlenose pliers, pull the heater clips off of the evaporator and pull the defrost heater from the front of the evaporator. (See Figure 7-79)

NOTE: When installing a replacement heater, make

sure it is positioned as far left as possible. Installing the heater too close to the terminator could cause shortened defrost times which will lead to incomplete defrost.

Control Board Assembly Removal (All Base Units)

The control board assembly sets in the right side of the sump area. A flange on the right side of the control board assembly fits into a groove in the sump to help locate it. There are also raised areas at the front and back of the sump that hold the control board assembly in place.

To access and remove the control board assembly, first remove the bottom drawer, bottom drawer closer and sump cover. On the 700BFI-2, the icemaker will also need to be removed. (Removing the top drawer is not necessary, but will make this task easier.) Then, unplug all electrical leads running to and from the control board assembly and lift the assembly from the sump area.

(See Figure 7-80)

Figure 7-79. Defrost Heater Removal, BF/I-2

Pull Heater Clips off with needlenose pliers to remove evaporator defrost heater

Defrost Heater

Control Board Assembly

Figure 7-80. Control Board Assembly Removal

Page 99

Component Access/Removal

Integrated (

700-

2) Series

7-32

#3756780 - Revision D - July, 2005

Figure 7-83. Baffle Control Removal, BR-2

Pry Baffle Control from back of duct

Back Air Duct Assembly Removal (All Base Units)

A back air duct assembly is held in place with screws that pass through the duct into screw grommet/standoffs and one screw that passes through the duct into a grounding bracket.

To access and remove a back air duct assembly, first remove the drawers, drawer closers, drawer slides, Reed switches and sump cover. On a 700TR-2, the mullion divider assembly and mullion divider supports will also need to be removed, and on a 700BFI-2, the icemaker assembly will need to be removed.

Begin removing the back air duct by extracting the mounting screws. Remove the plastic nut that holds the Methode connector of the control wire harness to the duct. (See Figure 7-81) Lean the top of the air duct forward. On a model 700BR-2, reach behind the duct and disconnect the electrical leads from the baffle control. (See Figure 7-82) On a model 700BF/I-2, reach behind the duct and disconnect the electrical leads from the icemaker switch. Pull the air duct assembly out through the top drawer opening.

Baffle Control Removal (700BR-2 Only)

The baffle control in the 700BR-2 is attached to the back of the air duct with double stick tape.

To access and remove the baffle control, first remove the drawers, drawer closers, drawer slides, Reed switches, sump cover and back duct. Then, pry the baffle control off the back of the air duct with a chisel or similar tool. (See Figure 7-83)

NOTE: Before installing the replacement baffle control,

be sure to clean all tape residue from the area.

Figure 7-81. Remove Nut from Methode Connector

Turn nut counterclockwise to remove

Figure 7-82. Unplug Baffle Control, BR-2

Baffle Control on back of duct

Electrical Leads to Baffle Control

Page 100

Component Access/Removal

Integrated (

700-

2) Series

7-33

#3756780 - Revision D - July, 2005

Icemaker Switch Removal (700BFI-2 Only)

The icemaker switch in the 700BF/I-2 fits in a square hole in the back air duct, just below the icemaker. Tabs on the sides of the switch hold the switch in place.

To access and remove the icemaker switch, first remove the drawers, drawer closers, drawer slides, Reed switches, icemaker, sump cover and back duct. Then, depress the tab on the side of the switch and push the switch out from the hole. (See Figure 7-84)

Evaporator Fan Assembly Removal (All Base Units)

The side flanges of the evaporator fan assembly slide down into grooves in the fan shroud. The bottom of the evaporator fan assembly sits on a flange at the bottom of the fan shroud. (See Figure 7-85)

To access and remove the evaporator fan assembly, first remove the drawers, drawer closers, drawer slides, Reed switches sump cover and back duct. On a 700TR-2, the mullion divider assembly and mullion divider supports will also need to be removed, and on a 700BFI-2, the icemaker assembly will need to be removed. Then, unplug the fan assembly electrical leads and pull the assembly up out of the grooves in the fan shroud. (See Figure 7-86)

NOTE: Do not attempt to remove the fan assembly

without removing the back duct. Doing so will deform the back duct and cause air leaks around the air baffles.

Figure 7-84. Icemaker Switch Removal, BF/I-2

Depress tabs on switch and push from the hole

Figure 7-86. Evaporator Fan Assembly Removal

Figure 7-85. Evaporator Fan Assembly in Sump

Fan Shroud

Evaporator Fan Assembly