Sub-Zero 700TC-3, 700TR-3, 700TCI-3, 700TFI-3, 736TC-3 Service Manual

...

Download

Page 1

IInntteeggrraatteedd

((770000--

TTAALLLL))

SSeerriieess

TTeecchhnniiccaall

SSeerrvviiccee MMaannuuaall

Page 2

Page 3

Integrated

(700-

TTALL)

ALL)

Series

General Information

1-1

#3758412 - Revision B - December, 2006

SECTION 1

GENERAL

INFORMATION

Page 4

General Information

Integrated

(700-

TTALL)

ALL)

Series

1-2

#3758412 - Revision B - December, 2006

TECHNICAL ASSISTANCE

If you should have any questions regarding the 700-3 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

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.

INTRODUCTION

This Technical Service Manual has been compiled to provide the most recent service information for 700-3 Series Tall units. This information will enable the service technician to troubleshoot and diagnose malfunctions, perform necessary repairs, and return a unit to proper operational condition.

The service technician should read the complete instructions contained in this manual before initiating any repairs on a 700-3 Tall Series unit.

INDICATES THAT HAZARDOUS OR UNSAFE PRACTICES COULD RESULT IN SEVERE PERSONAL INJURY OR DEATH.

Indicates that hazardous or unsafe practices could result in minor personal injury, and/or product damage, and/or property damage.

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

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.

Page 5

Integrated

(700-

TTALL)

ALL)

Series

General Information

1-3

#3758412 - Revision B - December, 2006

Section 1 - General Information 1-1

Introduction ....................................................................... 1-2

Important Safety Information ............................................ 1-2

Technical Assistance ........................................................ 1-2

Table of Contents ............................................................. 1-3

Warranty Information ........................................................ 1-5

Model Description ............................................................. 1-6

Section 2 - Installation Information 2-1

Installation Considerations ............................................... 2-2

Unit leveling ................................................................. 2-2

Door & Drawer Adjustment ........................................... 2-3

Door Stop Adjustment .................................................. 2-3

Dual Unit Installation .................................................... 2-4

Section 3 - Electronic Control System Information 3-1

Terminology & Component Descriptions .......................... 3-2

Basic Electronic Control System ....................................... 3-3

Control Board Layout & Summary Table ......................... 3-4

Control Panel Layout ....................................................... 3-5

Basic Electronic Control Input Operations ....................... 3-5

Unit ON/OFF ................................................................ 3-5

Adjusting Set-Point (Temp. Adjustment) ...................... 3-6

Icemaker System ON/OFF ........................................... 3-6

Door Ajar Alarm Feature ON/OFF ................................ 3-6

Unique Electronic Control Input Operations .................... 3-7

Temperature Units Selection Mode .............................. 3-7

Sabbath Mode .............................................................. 3-8

Showroom Mode .......................................................... 3-8

Manual Zone Disable Mode .......................................... 3-9

Manual Freezer Evaporator Defrost ............................. 3-9

Functions of the Electronic Control System ................... 3-10

Supply Power to the Lighting System ........................ 3-10

Monitor, Regulate & Display Compartment Temp’s ..... 3-11

Control Variable Speed Compressor (700TF/I-3) ........ 3-12

Control Condenser Fan Run ....................................... 3-13

Refrigerator “Fan-Assisted Off-Cycle Defrost” ............. 3-14

Freezer “Adaptive Defrost” .......................................... 3-15

Monitor Compressor Run, Display Service ................. 3-16

Monitor Speed Signal to Variable Speed Comp.,

Display Service (700TF/I-3) ......................................... 3-17

Monitor Ice Making System, Display Service .............. 3-18

Possible Error Indicators ................................................ 3-19

700TC/I-3 & 736TC/I-3 ................................................. 3-19

700TR-3 & 736TR-3 .................................................... 3-20

700TF/I-3 ..................................................................... 3-21

Troubleshooting Input Operations ................................... 3-22

Diagnostic Mode ........................................................ 3-22

Thermistor Location Code Tables ........................... 3-23

Diagnostic Mode Indicators ...................................... 3-23

Error Code Table ...................................................... 3-24

Clearing Error Codes ................................................ 3-24

Manual Component Activation Mode ........................... 3-25

Temperature Log Recall Mode ................................... 3-26

Compartment Temp. History Only ............................ 3-26

Compartment & Evaporator Temp. History .............. 3-27

Possible Event Indicators ..................................... 3-28

Temperature Log Index Chart ................................ 3-29

Section 4 - Sealed System Information 4-1

HFC-134a Refrigerant Service Information ...................... 4-2

General Rules for Working with 134a Refrigerant ........ 4-2

Sealed System Repair Procedures .............................. 4-3

Sealed System Operation ................................................ 4-4

Sealed System Refrigerant Flow Diagrams ..................... 4-6

Models 700TC/I-3 & 736TC/I-3 ...................................... 4-6

Models 700TR-3 & 736TR-3 .......................................... 4-7

Model 700TF/I-3 ............................................................ 4-7

Section 5 - Air Flow & Fan Blade Spacing 5-1

Models 700TC/I-3 & 736TC/I-3 .......................................... 5-2

Models 700TR-3 & 736TR-3 .............................................. 5-3

Model 700TF/I-3 ................................................................ 5-3

Section 6 - Icemaker Information

6-1

Modular Icemaker ........................................................... 6-2

Modular Icemaker Operation ...................................... 6-2

Additional Icemaker Operation Notes ......................... 6-3

What Happens During Ejector Blade Rotation ............ 6-3

Modular Icemaker Test Procedures ................................ 6-4

Voltage Tests ................................................................ 6-4

Continuity Tests & Thermostat Inspection ................... 6-4

Water Fill Adjustment ...................................................... 6-5

Icemaker Disassembly .................................................... 6-5

Module/Motor Assembly ............................................. 6-5

Mold/Heater Assembly ............................................... 6-5

Ejector Blades and/or Ice Stripper .............................. 6-5

Icemaker Thermostat ................................................. 6-5

Section 7 - Component Access and Removal 7-1

Component Access and Removal ............................ 7-2

WARNINGS & CAUTIONS ................................................ 7-2

Exterior Cosmetic and Mechanical Components ......... 7-3

Kickplate/Grille .............................................................. 7-3

Side Molding Strip .......................................................... 7-3

Upper Compartment Light Switch and Fan Switch ........ 7-3

Drawer Assembly .......................................................... 7-4

Door & Drawer Gasket ................................................. 7-4

Door Assembly ............................................................. 7-5

Upper and Lower Hinge Assembly ................................ 7-5

TABLE OF CONTENTS

Page #

Page 6

General Information

Integrated

(700-

TTALL)

ALL)

Series

1-4

#3758412 - Revision B - December, 2006

Interior Cosmetic, Mechanical and Electrical

Components ................................................................... 7-6

Door Shelf and Dairy Compartment ............................ 7-6

Compartment Shelf ....................................................... 7-6

Upper Light Diffuser ...................................................... 7-7

Light Bulb...................................................................... 7-7

Control Board ................................................................ 7-8

Control Panel Assembly ................................................ 7-8

Upper Evaporator Cover / Air Duct ............................... 7-9

Upper Evaporator Fan Shroud Assy ............................. 7-9

Upper Compartment Evaporator Fan Assy .................. 7-10

Upper Compartment Thermistor ...................................7-10

Upper Evap. Thermistor (All Except 700TF/I-3) .......... 7-10

Drawer Closer Assembly .............................................. 7-11

Drawer Slide Assembly ................................................ 7-11

Drawer Slide Pin ....................................................... 7-11

Icemaker Assy. (All Models w/Icemaker) .................... 7-11

Heat Exchanger Cover ................................................ 7-12

Lower Evap. Cover Assy (700TR-3, 736TR-3) ........... 7-12

Lower Evap. Fan Assy (700TR-3, 736TR-3) .............. 7-12

Lwr Cmprtmnt Thermistor (700TR-3, 736TR-3) ........... 7-13

Lwr Evap. Thermistor (700TR-3, 736TR-3) ................. 7-13

Lower Evaporator Cover Assy

(700TC/I-3, 700TF/I-3, 736TC/I-3) ............................... 7-13

Drain Trough Heater

(700TC/I-3, 700TF/I-3, 736TC/I-3) ............................... 7-14

Lower Evaporator Fan Shroud

(700TC/I-3, 700TF/I-3, 736TC/I-3) ............................... 7-14

Lower Evaporator Fan Assy

(700TC/I-3, 700TF/I-3, 736TC/I-3) ............................... 7-14

Defrost Terminator

(700TC/I-3, 700TF/I-3, 736TC/I-3) ............................... 7-15

Defrost Heater (700TC/I-3, 700TF/I-3, 736TC/I-3) ...... 7-15

Switch Enclosure Assembly ......................................... 7-16

Lower Evaporator Thermistor

(700TC/I-3, 700TF/I-3, 736TC/I-3) ............................... 7-16

Lower Compartment Thermistor

(700TC/I-3, 700TF/I-3, 736TC/I-3) ............................... 7-17

Fill Tube Heater (700TC/I-3, 700TF/I-3, 736TC/I-3) .... 7-17

Lower Compartment Light / Fan / Icemaker Switch ..... 7-17

Compressor Area Electrical & Mechanical

Components ................................................................... 7-18

IM Water Valve (700TC/I-3, 700TF/I-3, 736TC/I-3) ..... 7-18

Condenser Fan Assembly ........................................... 7-19

Sealed System Components ....................................... 7-20

Upper Compartment Evap (All Except 700TF/I-3) ...... 7-20

Lower Compartment Evaporator ................................ 7-20

High-Side Filter-Drier ................................................... 7-21

Compressor ................................................................. 7-22

Condenser .................................................................... 7-23

Upper Compartment Heat Exchanger ......................... 7-24

Lower Compartment Heat Exchanger ......................... 7-25

Page #

Section 8 - Troubleshooting Guides 8-1

How to Use Error Code Troubleshooting Guide ............... 8-2

Error Code Table ............................................................ 8-2

Error Code Troubleshooting Guide ................................ 8-3

How to Use the General Troubleshooting Guide ............. 8-5

General TS Guide Table of Contents ............................. 8-6

Sealed System Troubleshooting / Diagnostic Tables .... 8-20

Normal Operating Pressures ....................................... 8-20

Pressure Indications ................................................... 8-21

Temperature/Low Side Pressure.................................. 8-21

Membrane Switch / Ribbon Cable Test .......................... 8-22

Door Hinge Operation Test & Corrections ..................... 8-23

Section 9 - Technical Data Tables 9-1

Model 700TC/I-3 .............................................................. 9-2

Model 700TR-3 ............................................................... 9-3

Model 700TF/I-3 .............................................................. 9-4

Model 736TC/I-3 .............................................................. 9-5

Model 736TR-3 .............................................................. 9-6

Section 10 - W

iring Diagrams 10-1

700TC/I-3 Wiring Diagram .............................................. 10-2

700TC/I-3 Wiring Schematic ........................................ 10-3

700TR-3 Wiring Diagram ................................................ 10-4

700TR-3 Wiring Schematic .......................................... 10-5

700TR-3 Wiring Diagram ................................................. 10-6

700TR-3 Wiring Schematic ......................................... 10-7

700TF/I-3 Wiring Diagram ............................................. 10-8

700TF/I-3 Wiring Schematic ...................................... 10-9

736TC/I-3 Wiring Diagram ............................................ 10-10

736TC/I-3 Wiring Schematic ...................................... 10-11

736TR-3 Wiring Diagram ............................................... 10-12

736TR-3 Wiring Schematic ........................................ 10-13

Page 7

Integrated

(700-

TTALL)

ALL)

Series

General Information

1-5

#3758412 - Revision B - December, 2006

736TCI 3 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 2005

Model Number

Serial Number

Manufacture Date

Refrigerant Charge

Total Amps Refrigerant Type

WARRANTY INFORMATION

This page summarizes the 2, 5 & 12 Year Residential Warranty provided with every Sub-Zero, as well as two

special warranties:

• Non-Residential Warranty - Applies to units installed

in non-residential applications.

• Display/Model Home Warranty - Applies to distribu-

tor or dealer display units, and units in model homes, sold three years after date of manufacture.

Following the warranty summaries are details and notes about the warranties.

TWO, FIVE & TWELVE YEAR Warranty

• 2 year TOTAL PRODUCT, *parts and labor.

• 5 Year SEALED SYSTEM, **parts and labor.

• 6th - 12th year LIMITED SEALED SYSTEM, **parts only.

ONE & FIVE YEAR Non-Residential Warranty (Example: Office, Yacht, etc.)

• 1 Year TOTAL PRODUCT, *parts and labor.

• 5 Year SEALED SYSTEM, **parts and labor.

ONE & FIVE YEAR Display/Model Home Warranty (Display units sold three years after date of manufacture)

• 1 Year TOTAL PRODUCT, *parts and labor.

• 5 Year SEALED SYSTEM, **parts and labor.

Warranty Details:

* Includes, but is not limited to the following:

Electronic Control System Components, Fan & Light Switches, Fan Motors & Blades, Defrost & Drain Heaters, Defrost Terminator, Drain Pan, Drain Tubes, Wiring, Light sockets & bulbs, Icemaker, Water Valve, Door hinges, Door closers & Cams, Compressor Electricals, etc. . .

* Stainless Steel (Classic, Platinum & Carbon) doors,

panels and product frames are covered by a limited 60 day parts and labor warranty for cosmetic defects.

** Includes the following:

Compressors, Condenser, 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 unit's initial installation date.

• All Warranty and Service information collected by SubZero is arranged and stored under the unit serial number, and the customer's last name. Sub-Zero requests that you have the model and serial number available whenever contacting the factory or parts distributor.

• The serial tag is located on the left wall of the upper drawer compartment.

REFRIGERATOR

PRODUCT SERVICE 1-800-222-7820

MODEL

MADISON, WI

REFRIGERANT

FREEZER

FREEZER CO., INC.

SERIAL NUMBER

TOTAL AMPS

115Vac, 60Hz, 1 Phase

LISTED HOUSEHOLD

REFRIGERATOR OR FREEZER

CUS

LISTED

776N

Date Code

ALSO VERIFIED IN ACCORDANCE WITH ENERGY STANDARD

CAN/CSA-C300-91

Page 8

General Information

Integrated

(700-

TTALL)

ALL)

Series

1-6

#3758412 - Revision B - December, 2006

Figure 1-2. Model 700TC-3 & 700TCI-3

Lower Two Drawer Freezer Zone

MODEL DESCRIPTIONS

This page briefly describes the models covered in this 700-3 Tall Unit Technical Service Manual.

Upper Refrigerator Zone

Figure 1-3. Model 700TR-3

Lower Two Drawer Refrigerator Zone

Upper Refrigerator Zone

700TC-3

700TCI-3

MODEL DESCRIPTION

700 Series, 27

” Wide

Tall Combination

Refrigerator/Freezer

, 3rd Design Build

00 Series, 27” Wide

Tall Combination

Refrigerator/Freezer

, w/Icemaker, 3rd Design

Build

700TR-3

MODEL DESCRIPTION

700 Series, 27” Wide Tall Refrigerator, 3rd

Design Build

Page 9

Integrated

(700-

TTALL)

ALL)

Series

General Information

1-7

#3758412 - Revision B - December, 2006

Figure 1-4. Model 700TF-3 & 700TFI-3

All Freezer Zone

700TF-3

700TFI-3

MODEL DESCRIPTION

700 Series, 27

” Wide

Tall Freezer, 3rd Design

Build, Variable Speed Compressor

700 Series, 27” Wide Tall Freezer, w/Icemaker, 3rd Design Build, Variable Speed Compressor

Figure 1-5. Model 736TC-3 & 736TCI-3

Lower Two Drawer Freezer Zone

Upper Refrigerator Zone

736TC-3

736TCI-3

MODEL DESCRIPTION

700 Series, 36” Wide Tall Combination

Refrigerator/Freezer,

3rd Design Build

700 Series, 36” Wide Tall Combination

Refrigerator/Freezer

, w/

Icemaker, 3rd Design

Build

Page 10

General Information

Integrated

(700-

TTALL)

ALL)

Series

1-8

#3758412 - Revision B - December, 2006

Figure 1-6. Model 736TR-3

Lower Two Drawer Refrigerator Zone

Upper Refrigerator Zone

736TR-3

MODEL DESCRIPTION

700 Series, 36” Wide Tall Refrigerator, 3rd

Design Build

Page 11

Integrated

(700-

TTALL)

ALL)

Series

Installation Information

2-1

#3758412 - Revision B - December, 2006

SECTION 2

INSTALLATION

INFORMATION

Page 12

Installation Information

Integrated

(700-

TTALL)

ALL)

Series

2-2

#3758412 - Revision B - December, 2006

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

Page 13

Integrated

(700-

TTALL)

ALL)

Series

Installation Information

2-3

#3758412 - Revision B - December, 2006

Figure 2-4. Adjusting Rear Levelers

Figure 2-5. 90° Door Stop Cam

Screwdriver

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.

90° Stop Cam

Page 14

Installation Information

Integrated

(700-

TTALL)

ALL)

Series

2-4

#3758412 - Revision B - December, 2006

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.

Figure 2-6. Dual Unit Heater (#TTDUAL Shown)

Apply heater to left side of right hand unit

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.

Page 15

Integrated

(700-

TTALL)

ALL)

Series

Electronic Control System

3-1

#3758412 - Revision B - December, 2006

SECTION 3

ELECTRONIC CONTROL

SYSTEM INFORMATION

Page 16

Electronic Control System

Integrated

(700-

TTALL)

ALL)

Series

3-2

#3758412 - Revision B - December, 2006

ELECTRONIC CONTROL TERMINOLOGY & COMPONENT DESCRIPTIONS

The electronic control system monitors, regulates and controls a variety of functions. It also displays temperature readings, ice maker system operational status, 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.

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 appliance.

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 components 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 zone tem-

peratures, service indicator, door ajar alarm bell & ice indicator.

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)

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

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

Error Codes .…………………..………... The code numbers accompanied by the letters “EC” that appear on the LCD dur-

ing diagnostic mode if the unit experienced specific problems related to electrical signals supplied by electrical components.

Display Units of Measure…………..…... Temperatures displayed at the LCD may be in fahrenheit units of measure (°F) or

celsius units of measure (°C). A series of key strokes allows the temperature display units of measure to be switched to read as either °F or °C.

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

WARMER keys.

High Offset (Cut-in)……………..……..... As the zone air temperature cycles up and down, the high offset is the maximum

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

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

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

Thermistor (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.

Variable Speed Compressor ….............. A compressor that runs at varying speeds depending on the load detected by the

compressor’s inverter.

Page 17

Integrated

(700-

TTALL)

ALL)

Series

Electronic Control System

3-3

#3758412 - Revision B - December, 2006

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

BASIC 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-3 used, See Figure 3-1). The entire electronic control system is described in greater detail on the following pages.

ALARM BELL

COND

FAN

R RRR

FILL TUBE

HEATER

RRRR

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

FREEZER COMP

FREEZER EVAP FAN

REFRIG COMP

REFRIG EVAP FAN

Page 18

Electronic Control System

Integrated

(700-

TTALL)

ALL)

Series

3-4

#3758412 - Revision B - December, 2006

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

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

CONTROL BOARD LAYOUT AND SUMMARY TABLE

The electrical connection points on the control board are labeled alphanumerically. These labels correspond with the alphanumeric control board summary table, located on the 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)

PIN 1

BOARD CONFIGURING

RESISTORS

PIN 1

E7 E10 E6E2

PIN 1

CIRCUIT

DEF HTRE2

FCOMP E10 E6 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

RCOMP

E FAN

IACC

LITES

ICE

NEU F DR R DR

EVAP FRZ

EVAP FRZ EVAP REF EVAP REF

REF REF FRZ FRZ

PIN 1

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 FRZ COMPARTMENT

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)

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

Page 19

Integrated

(700-

TTALL)

ALL)

Series

Electronic Control System

3-5

#3758412 - Revision B - December, 2006

UNIT

ICE

WARMER

COLDER

REFRIGERATOR

ON/OFF

WARMER

COLDER

FREEZER

ICE

SERVICE

OFF

CONTROL PANEL LAYOUT

Please note that an illustration of the 700TC/I-3 control panel is used in most cases for this section. (See Fig. 3-4)

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

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

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

BASIC ELECTRONIC CONTROL INPUT OPERATIONS

Following are illustrations which show the basic input operations performed at the 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 an illustration of the 700TC/I-3

control panel is used for most articles in this section, and in most cases Fahrenheit readings are shown.

Unit ON/OFF

All units are shipped in OFF Mode. When power is supplied to the unit, a trace of the word “OFF” is visible on the LCD. By pressing 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 is indicated by the unit’s lights energizing and LCD at the control panel illuminating with temperature readings.

NOTE: Whenever the unit is switched OFF using the UNIT ON/OFF key, a trace of the word “OFF” will be visible on the LCD as long as there is power to the unit.

UNIT

ON/OFF

KEY

DOOR / DRAWER

AJAR ALARM ON/OFF

KEY

REFRIGERATOR

SET-POINT

ADJUSTMENT

KEYS

(Upper Section on 700TR-3 & 736TR-3)

(Not present on 700TF/I-3)

FREEZER

SET-POINT

ADJUSTMENT

KEYS

(Lower Section on 700TR-3 & 736TR-3)

LCD

Liquid

Crystal

Display

ICEMAKER SYSTEM

ON/OFF KEY

(Not present on

700TR-3 & 736TR-3)

SERVICE

ICE

Jake Dog was here

OFF

FREEZER

COLDER

WARMER

COLDER

WARMER

REFRIGERATOR

ON/OFF

ICE

ON/OFF

UNIT

FREEZER

WARMERCOLDER

REFRIGERATOR

ICE

ON/OFF

UNIT

ON/OFF

Page 20

Electronic Control System

Integrated

(700-

TTALL)

ALL)

Series

3-6

#3758412 - Revision B - December, 2006

Adjusting Set-Point (Temperature Adjustment)

To adjust set-points, press WARMER or COLDER key on control panel in multiple key strokes

until desired set-point

is achieved (See Figure 3-6). One key stroke equals one degree change.

NOTE: The temperature range in a freezer zone is -5°F (-21°C) to +5°F (-15°C). The temperature range in a refrigerator zone is +34°F (+1°C) to +45°F (+7°C).

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

NOTE: The set-point will be displayed on the LCD for 10 seconds after the last key stroke. After the 10 second

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

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

Icemaker System ON/OFF

When a unit first arrives in a home, the icemaker system is off. By pressing and releasing the ICE ON/OFF key, power is allowed to the icemaker system and “ICE” appears on the LCD (See Figure 3-7). To switch the icemaker system off, press and release the ICE ON/OFF key again and the “ICE” indicator disappears from the LCD, indicating the icemaker system is of

NOTE: When in “Sabbath Mode,” the icemaker system is deactivated. Sabbath Mode will be explained later.

NOTE: To allow ice to freeze fully and reduce effects of low water pressure, power to the icemaker system is inter-

rupted for 45 minutes after each ice harvest. This can be bypassed for service purposes by switching the icemaker system OFF, then back ON with the ICE ON/OFF key.

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

Ice system active if “ICE” is displayed

Door Ajar Alarm Feature ( ) ON/OFF

All units are equipped with a door ajar alarm feature. To enable the door ajar alarm, press and release the Alarm Bell ON/OFF key on the control panel (See Figure 3-8). The bell indicator appears on the LCD indicating the alarm feature is active. With the alarm enabled, the bell indicator will flash and an audible alarm will beep whenever the door is left open for more then thirty seconds. To disable the door ajar alarm, press the Alarm Bell ON/OFF key again and the bell indicator disappears from the LCD, indicating the alarm feature is inactive.

Door Ajar Alarm active if Bell is displayed

Figure 3-8. Switching Door Ajar Alarm ON or OFF - Press ( )ON/OFF Key

FREEZER

WARMERCOLDER

REFRIGERATOR

ICE

ON/OFF

UNIT

ON/OFF

ICE

FREEZER

WARMERCOLDER

REFRIGERATOR

ICE

ON/OFF

UNIT

ON/OFF

FREEZER

WARMERCOLDER

REFRIGERATOR

ICE

ON/OFF

UNIT

ON/OFF

Page 21

Integrated

(700-

TTALL)

ALL)

Series

Electronic Control System

3-7

#3758412 - Revision B - December, 2006

UNIQUE ELECTRONIC CONTROL INPUT OPERATIONS

The following pages illustrate unique 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 Zone Disable 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 temperature units of measure from Fahrenheit (°F) to Celsius (°C) readings, press and hold the door ajar alarm bell ON/OFF key and the UNIT ON/OFF key simultaneously for five (5) seconds, then release the keys (See Figure 3-9). “ °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 (See Figure 3-10).

NOTE: Temperature Units Selection Mode will end ten (10) seconds after the last key stroke.

NOTE: Do not

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

Figure 3-10. Converting Back to Fahrenheit Units of Measure

(within ten (10) 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

Figure 3-9. 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 (5) Seconds

Press and hold for 5 seconds

FREEZER

WARMERCOLDER

REFRIGERATOR

ICE

ON/OFF

UNIT

ON/OFF

FREEZER

WARMERCOLDER

REFRIGERATOR

ICE

ON/OFF

UNIT

ON/OFF

Page 22

Electronic Control System

Integrated

(700-

TTALL)

ALL)

Series

3-8

#3758412 - Revision B - December, 2006

Figure 3-12. Then Press and Hold UNIT ON/OFF Key for 10 Seconds

Showroom Mode

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

To initiate Showroom Mode, the unit must first be switched OFF using the UNIT ON/OFF key (See Figure 3-13), then press and hold either pair of WARMER and COLDER keys, then the UNIT ON/OFF key, then release all three keys (See Figure 3-14). To return the unit to normal operation, repeat the steps above.

NOTE: Always check set-points after returning unit to normal operation.

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 3-14. Then Press and Hold WARMER and COLDER Keys, Then the UNIT ON/OFF Key

Figure 3-13. To Enter (or Exit) Showroom Mode, Switch Unit OFF First

Press and hold for 10 seconds

Sabbath Mode

Sabbath Mode was incorporated into the electronic control system for the observance of certain religious days. Initiating Sabbath Mode disables the LCD, lighting system, ice making system and door ajar alarm feature.

To initiate Sabbath Mode, the unit must first be switched OFF using the UNIT ON/OFF key (See Figure 3-11), then press and hold the UNIT ON/OFF key until the LCD and lights switch OFF, approximately ten (10) seconds (See Figure 3-12). To return to normal operation, press and release the UNIT ON/OFF key.

NOTE: During Sabbath Mode, the LCD is disabled and set-points cannot be changed.

NOTE: During Sabbath Mode, the compartment thermistors still control compressor operation, except when high

offset is reached, there is a random fifteen (15) to twenty-five (25) second delay before compressors are energized.

Figure 3-11. To Enter Sabbath Mode, Switch Unit OFF First

OFF

FREEZER

WARMERCOLDER

REFRIGERATOR

ICE

ON/OFF

UNIT

ON/OFF

FREEZER

WARMERCOLDER

REFRIGERATOR

ICE

ON/OFF

UNIT

ON/OFF

OFF

FREEZER

WARMERCOLDER

REFRIGERATOR

ICE

ON/OFF

ICE

ON/OFF

UNIT

ON/OFF

UNIT

ON/OFF

Page 23

Integrated

(700-

TTALL)

ALL)

Series

Electronic Control System

3-9

#3758412 - Revision B - December, 2006

Manual Zone Disable Mode

Manual Zone Disable Mode allows a customer or Service Technician to switch one zone off for interior cleaning, defrosting, or diagnostic purposes, while allowing the other zone to continue cooling.

To initiate Manual Zone Disable Mode, the unit must first be switched OFF using the UNIT ON/OFF key (See Figure 3-15), then press and hold the WARMER key for the zone being disabled, then the UNIT ON/OFF key, then release both keys (See Figure 3-16). The LCD will display “- -” (double dashes) in place of temperature readings for the zone chosen, indicating all cooling functions for that zone are disabled. To return the unit to normal operation, repeat the steps above, or press UNIT ON/OFF key.

NOTE: Always check set-points after returning unit to normal operation.

Figure 3-16. Then Press and Hold WARMER Key for Zone Being Disabled,

Then the UNIT ON/OFF Key.

Figure 3-15. To Enter (or Exit) Manual Zone Disable Mode, Switch Unit OFF First

Indicating that all cooling functions for that zone are disabled.

Manual Freezer Evaporator Defrost

Manual Freezer Evaporator Defrost was incorporated into the electronic control to assist in servicing and diagnostics.

To initiate manual freezer evaporator defrost, press and hold the ICE ON/OFF key for five (5) seconds, then release the key. (See Figure 3-17).

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

Figure 3-17. Initiate Manual Freezer Evaporator Defrost - Press and Hold ICE ON/OFF key for 5 Seconds

Press and hold for 5 seconds

OFF

FREEZER

WARMERCOLDER

REFRIGERATOR

ICE

ON/OFF

UNIT

ON/OFF

FREEZER

WARMERCOLDER

REFRIGERATOR

ICE

ON/OFF

UNIT

ON/OFF

ICE

FREEZER

WARMERCOLDER

REFRIGERATOR

ICE

ON/OFF

UNIT

ON/OFF

Page 24

Electronic Control System

Integrated

(700-

TTALL)

ALL)

Series

3-10

#3758412 - Revision B - December, 2006

FUNCTIONS OF THE ELECTRONIC CONTROL SYSTEM

The following pages explain monitoring, regulating and controlling functions of the electronic control system. In most cases signal traces of a model 700TCI-3 wiring schematic are used to show current flow for functions being explained.

Supply Power to the Lighting System

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

by pressing

the UNIT ON/OFF key. With the doors open, the light switches allows power to the lights (See Figure 3-18).

NOTE: 115 Volt AC signal to the lights is monitored by the microprocessor to control the door ajar alarm feature.

NOTE: If in Sabbath Mode, th lighting system is disabled. Sabbath Mode will be covered later.

Figure 3-18. 700TC/I-3 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 25

Integrated

(700-

TTALL)

ALL)

Series

Electronic Control System

3-11

#3758412 - Revision B - December, 2006

Monitor, Regulate and Display Compartment Temperatures

The temperature signal from the compartment thermistor 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 3-19). When the compartment temperature reaches high offset, the microprocessor supplies power to the compressor and evaporator fan (See Figure 3-20). 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 3-19. Average Compartment Temperature Displayed

Compartments

calling for cooling

(Temp. above high offset)

Compressors and evaporator fans energized

Figure 3-20. 700TC/I-3 Signal Trace Schematic (High & Low Voltage) of Regulating Temperatures

HIGH VOLTAGE

E2 E7 E10 E6

FREEZER

WARMERCOLDER

LOW VOLTAGE

DISPLAY

PIN 1

E2 E6E10E7

PIN 1

BLACK

WHITE

GRAY

115 VOLTS 60 CYCLES

PURPLE

PIN 1

PIN 1PIN 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

FAN

PURPLE RED

SWITCHES

FREEZER

COMPRESSOR

REF CAB THERMISTOR

FZR CAB THERMISTOR

RED

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 26

Electronic Control System

Integrated

(700-

TTALL)

ALL)

Series

3-12

#3758412 - Revision B - December, 2006

Assist in Control of Variable Speed Compressors (700TF/I-3 Only)

As mentioned on the previous page, temperature signals from the thermistors in the compartment are monitored by the microprocessor and then displayed on the LCD.

When the compartment reaches high-offset (calling for cooling), an “ON” signal is sent from the control board to the compressor’s inverter. The inverter (which is supplied with AC power at all times) then provide high DC voltage (3phase, 50 - 150 Hz), outputs to the compressor. The inverter in turn senses the compressor load. If the compressor load is high, the speed command from the inverter will be for high speed compressor operation; if medium compressor load, speed command from the inverter will be for medium speed; if low compressor load, speed command from the inverter will be for low speed. If/when the compartment reaches low-offset, an “OFF” signal is sent to the inverter, which then cuts DC power to the compressor.

NOTE:

• The variable speed compressor, evaporator fan and the 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.

• Initial speed command from an inverter to a compressor are always for High speed.

Figure 3-21. 700TF/I-3 Signal Trace Schematic of Variable Speed Compressor Operation

IN EXCESS OF 200 VOLTS MAY BE PRESENT AT INVERTER AND COMPRESSOR!

1. Compartment temperature monitored by microprocessor

3. Inverter supplies

high DC voltage, 3-phase, 50 - 150 Hz signal, based on compressor load.

2. When cooling is called for, 115 Volts AC “ON” signal supplied to compressor inverter, evaporator fan and condenser fan.

NOTE: Line voltage supplied to inverter at all times.

E2 E7 E10 E6

LOW VOLTAGE

PIN 1

E2 E6E10E7

PIN 1

HIGH VOLTAGE

BLACK

WHITE

115 VOLTS

60 CYCLES

BLACK

PURPLE

DISPLAY

PIN 1

NEUT

PIN 1

CONDENSER

FAN MOTOR

MEMBRANE SWITCH

WHITE

FREEZER

PURPLE RED

FAN SWITCHES

BLUE W/BLACK STRIPE BLUE W/BLACK STRIPE

VSPEED

CONTROL

BOX

FRZ CAB THERMISTOR

LT. BLU E

FREEZER

FAN MOTOR

BROWN

BLACK

Page 27

Integrated

(700-

TTALL)

ALL)

Series

Electronic Control System

3-13

#3758412 - Revision B - December, 2006

Control Condenser Fan Run

In all models except the 700TF/I-3, 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 3-22)

NOTE: There is only one compressor on the model 700TF/I-3. The condenser fan cycles with this single compressor, which along with the evaporator fan, will cycle off during defrost and may also cycle off for short periods of time if the ambient temperature is low enough.

Figure 3-22. 700TC/I-3 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 28

Electronic Control System

Integrated

(700-

TTALL)

ALL)

Series

3-14

#3758412 - Revision B - December, 2006

Monitor and Control Refrigerator “Fan-Assisted, Off-Cycle Defrost”

Temperature signals from refrigerator evaporator's thermistor’s are observed by the microprocessor. During off cycle defrost, if a refrigerator zone temperature reaches high offset (calling for cooling) before evaporator temperature rises to 38°F (3°C), no power will be supplied the the compressor. But, the the zone evaporator fan will switch ON. Once the evaporator temperature reaches 38°F (3°C), normal cooling functions begin. (See Figure 3-23).

NOTE: If refrigerator compartment thermistor is faulty, compressor operation defaults to 20 minutes ON, 40 minutes OFF cycling, EE appears in left of LCD, SERVICE will flash and Error Code 05 will be logged.

NOTE: If evaporator thermistor is faulty, the compressor will not energize until zone air temperature exceeds high offset by 5°F (3°C). SERVICE flashes and Error Code 06 is logged.

NOTE: When in Sabbath Mode, the refrigerator compartment thermistor still controls compressor operation, except there is a random 15 to 25 second delay before the compressor is energized.

Figure 3-23. 700TC/I-3 Signal Trace Schematic (High & Low Voltage) of Refrigerator Off-Cycle Defrost

E2E7E10

E10

LOW VOLTAGE

HIGH VOLTAGE

NEUT

115 VOLTS

60 CYCLES

REFRIGERATOR

OVERLOAD

PROTECTOR

REFRIGERATOR

COMPRESSOR

BLACK

WHITE

STARTING

RELAY

MEMBRANE SWITCH

DISPLAY

REF EVAP THERMISTOR

BLUE W/YELLOW STRIPE

BLUE W/WHITE STRIPE

ORANGE W/YELLOW STRIPE

REF CAB THERMISTOR

(WHEN USED)

PIN 1

REFRIGERATOR

FAN SWITCH

REFRIGERATOR

FAN MOTOR

RED

1. High offset temperature reached, calling for cooling

2. Evaporator temperature below 38°F (3°C)

4. No power supplied to refrigerator compressor circuit

3. Evaporator fan energized

Page 29

Integrated

(700-

TTALL)

ALL)

Series

Electronic Control System

3-15

#3758412 - Revision B - December, 2006

Monitor and Control Freezer “Adaptive Defrost”

Initially the freezer compressor will cycle-run for twelve hours (twenty-four hours in the model 700TF/I-3), 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 3-24). 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 (5) minute time delay/dwell follows all defrosts, except in the model 700TF/I-3 where the delay/dwell is ten (10) minutes. The drain trough heater is energized during defrost and the delay/dwell period.

NOTE: The minimum defrost interval is six (6) hours; The maximum defrost interval is eighty (80) hours; the maximum defrost duration is twenty-five (25) minutes.

NOTE: If the defrost sensing line is open, defrost operation defaults to 25 minute defrost time / 6 hour build time, and Error Code 22 is logged. If the evaporator thermistor detects an under-heat or overheat situation at the same time, Error Codes 20 or 23 is logged, respectively.

NOTE: During defrost, the displayed temperature is locked.

Figure 3-24. 700TC/I-3 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 30

Electronic Control System

Integrated

(700-

TTALL)

ALL)

Series

3-16

#3758412 - Revision B - December, 2006

Figure 3-25. 700TC/I-3 Signal Trace Schematic (High Voltage) of Compressor Electrical System

Figure 3-26. “SERVICE”, “40” or “50” and “EC” Flashing = Several Excessive Compressor Run Periods

length of compressor run time is monitored

by microprocessor.

Monitor Compressor Run Duration, Displays If Service is Needed

In all models except the 700TF/I-3, the microprocessor observes the changing state of the compressor relays to determine the length of compressor run time (See Figure 3-25). If a compressor runs 100% (Fre = 6 hours / Ref = 4 hours), an error code is logged (EC 40 / EC 50, respectively), and defrost is initiated, but SERVICE will not flash.

If several 100% run periods occur, and the compartment temperature does not fall to at least the set point / low offset temperature average (and the door is not opened during the last run period), then SERVICE will flash along with the error code (See Figure 3-26).

NOTE: To clear a flashing SERVICE and EC, the problem must be corrected, then switch the unit off then back on and/or press the Bell ON/OFF key for 15 seconds. Failure to clear an error code will cause SERVICE to display constant once Diagnostic Mode is initiated.

NOTE: If the unit is ever switched OFF then back ON, the compressor will not energize for at least 3 minutes. This 3 minute minimum OFF time is used to protect the compressor and its electricals.

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

WARMERCOLDER

REFRIGERATOR

ICE

ON/OFF

UNIT

ON/OFF

Page 31

Integrated

(700-

TTALL)

ALL)

Series

Electronic Control System

3-17

#3758412 - Revision B - December, 2006

Figure 3-28. 700TC/I-3 Signal Trace Schematic (High Voltage) of Icemaker Electrical System

Figure 3-29. ICE & SERVICE Flashing = Solenoid Energized 15 sec., every 24 hrs., 5 consecutive times

115 Volts to water valve solenoid is monitored by microprocessor. If voltage supply 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 observes the 115 Volts AC supplied to the icemaker water valve solenoid. If the solenoid is energized for more than 15 seconds, power to the icemaker system is disabled for 24 hours (See Figure 3-28), and an error code is logged (EC 30). If this happens five consecutive times, ICE and SERVICE on the LCD will flash (See Figure 3-29), and the ICE ON/OFF key will be disabled.

NOTE: To clear the ICE and SERVICE error indicators, and reactivate the ICE ON/OFF key, the problem must be corrected, then the unit must be switched OFF and back ON, and the Alarm key must be pressed for 15 seconds to clear the Error Code.

NOTE: To allow ice to freeze fully and reduce effects of low water pressure, power to the icemaker system is interrupted for 45 minutes after each ice harvest. This can be bypassed for service purposes by switching the icemaker system OFF, then back ON using the ICE ON/OFF key.

NOTE: When in Sabbath Mode, the icemaker system is disabled. Sabbath Mode will be covered later.

HIGH VOLTAGE

115 VOLTS

BLACK

WHITE

60 CYCLES

NEUT

WHITE

E2 E7 E10 E6

TAN

PINK

ICEMAKER

SWITCH

TAN

ICEMAKER

WATER VALVE

WHITE/BLUE

2300-2900 OHMS

FILL TUBE

HEATER

ICE

SERVICE

FREEZER

WARMERCOLDER

REFRIGERATOR

ICE

ON/OFF

UNIT

ON/OFF

Page 32

Electronic Control System

Integrated

(700-

TTALL)

ALL)

Series

3-18

#3758412 - Revision B - December, 2006

POSSIBLE ERROR INDICATORS

These pages contain diagrams illustrating what a customer may see on the LCD if there is a problem with the unit.

NOTE: To clear indicators and error codes, problem must be corrected then press Bell ON/OFF key for 15 seconds. NOTE: For thermistor errors described below, thermistor can be tested by submersing it in a glass of ice water for 2

to 5 minutes, then check for 30,000 to 33,000 ohms.

• For Models 700TC/I-3 and 736TC/I-3, See Figures 3-30 through 3-36

• For Model 700TR-3 and 736TR-3, See Figures 3-37 through 3-42

• For Model 700TF/I-3, See Figures 3-43 through 3-47

Figure 3-34. 700TC/I-3 & 736TC/I-3

“ICE” & “SERVICE” Flashing = Valve Solenoid energized > fifteen (15) Seconds, Icemaker System Disabled

Figure 3-30. 700TC/I-3 & 736TC/I-3

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

Figure 3-31. 700TC/I-3 & 736TC/I-3

“SERVICE” Flashing and “EE” at right = Refrig. Compartment Thermistor (or its wiring) Fault

Figure 3-32. 700TC/I-3 & 736TC/I-3

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

Figure 3-33. 700TC/I-3 & 736TC/I-3

“40”, or “50” and “SERVICE” and “EC” Flashing = Excessive Compressor Run

Figure 3-35. 700TC/I-3 & 736TC/I-3

“SERVICE” Steady, not Flashing = Error Codes Observed in Diagnostic Mode, but not Cleared

Figure 3-36. 700TC/I-3 & 736TC/I-3

“ - - ” (Double Dashes) Displayed = Compartment Manually Disabled

SERVICE

FREEZER

WARMERCOLDER

REFRIGERATOR

ICE

ON/OFF

SERVICE

FREEZER

WARMERCOLDER

REFRIGERATOR

ICE

ON/OFF

SERVICE

FREEZER

WARMERCOLDER

REFRIGERATOR

ICE

ON/OFF

SERVICE

FREEZER

WARMERCOLDER

REFRIGERATOR

ICE

ON/OFF

UNIT

ON/OFF

UNIT

ON/OFF

UNIT

ON/OFF

UNIT

ON/OFF

SERVICE

ICE

SERVICE

FREEZER

WARMERCOLDER

FREEZER

WARMERCOLDER

FREEZER

WARMERCOLDER

REFRIGERATOR

ICE

ON/OFF

ICE

ON/OFF

ICE

ON/OFF

UNIT

ON/OFF

UNIT

ON/OFF

UNIT

ON/OFF

Page 33

Integrated

(700-

TTALL)

ALL)

Series

Electronic Control System

3-19

#3758412 - Revision B - December, 2006

Figure 3-38. 700TR-3 & 736TR-3

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

Figure 3-39. 700TR-3 & 736TR-3

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

Figure 3-37. 700TR-3 & 736TR-3

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

Figure 3-40. 700TR-3 & 736TR-3

“50”, “SERVICE” and “EC” Flashing = Excessive Compressor Run

Figure 3-41. 700TR-3 & 736TR-3

“SERVICE” Steady, not Flashing = Error Codes Observed in Diagnostic Mode, but not Cleared

Figure 3-42. 700TR & 736TR-3

“ - - ” (Double Dashes) Displayed = Compartment Manually Disabled

SERVICE

FREEZER

WARMERCOLDER

REFRIGERATOR

ICE

ON/OFF

SERVICE

FREEZER

WARMERCOLDER

REFRIGERATOR

ICE

ON/OFF

SERVICE

FREEZER

WARMERCOLDER

REFRIGERATOR

ICE

ON/OFF

SERVICE

FREEZER

WARMERCOLDER

REFRIGERATOR

ICE

ON/OFF

UNIT

ON/OFF

UNIT

ON/OFF

UNIT

ON/OFF

UNIT

ON/OFF

SERVICE

FREEZER

WARMERCOLDER

REFRIGERATOR

ICE

ON/OFF

FREEZER

WARMERCOLDER

REFRIGERATOR

ICE

ON/OFF

UNIT

ON/OFF

UNIT

ON/OFF

Page 34

Electronic Control System

Integrated

(700-

TTALL)

ALL)

Series

3-20

#3758412 - Revision B - December, 2006

Figure 3-44. 700TF/I-3

“ICE” & “SERVICE” Flashing = Valve Solenoid energized > fifteen (15) Seconds, Icemaker System Disabled

Figure 3-43. 700TF/I-3

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

Figure 3-46. 700TF/I-3

“SERVICE” Steady, not Flashing = Error Codes Observed in Diagnostic Mode, but not Cleared

Figure 3-47. 700TF/I-3

“ - - ” (Double Dashes) Displayed = Compartment Manually Disabled

SERVICE

FREEZER

WARMERCOLDER

REFRIGERATOR

ICE

ON/OFF

UNIT

ON/OFF

ICE

SERVICE

FREEZER

WARMERCOLDER

REFRIGERATOR

ICE

ON/OFF

UNIT

ON/OFF

SERVICE

FREEZER

WARMERCOLDER

REFRIGERATOR

ICE

ON/OFF

UNIT

ON/OFF

FREEZER

WARMERCOLDER

REFRIGERATOR

ICE

ON/OFF

UNIT

ON/OFF

Page 35

Integrated

(700-

TTALL)

ALL)

Series

Electronic Control System

3-21

#3758412 - Revision B - December, 2006

TROUBLESHOOTING INPUT OPERATIONS

The following few pages explain troubleshooting input operations performed at the 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. If errors were detected, “Error Codes” will also display during diagnostic mode.

NOTE: The model 700TF/I-3 has 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-3 control

panel is used to illustrate Diagnostic Mode key strokes.

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

COLDER key, and press the UNIT ON/OFF key, then release both keys (See Figure 3-48). If no error codes are registered, the left display area will show real-time temperature of the thermistor, the right display area will show the thermistor location code, and all LCD indicators will illuminate. Pressing either

COLDER key or either WARMER key while in Diagnostic Mode will toggle to the next or previous thermistor location, respectively. (See Figure 3-49, 3-50 and 3-51 and the Thermistor Location Code Tables on the next page)

NOTE: 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 3-48. Initiate Diagnostic Mode - Press and Hold Either

COLDER Key, Then the UNIT ON/OFF Key

(“F” Indicates Freezer Compartment)

Figure 3-49. Toggle Through Temperature Readings - Press Either COLDER Key

(“r” Indicates Refrigerator Compartment)

Figure 3-50. Toggle Through Temperature Readings - Press Either

COLDER Key

(“FE” Indicates Freezer Evaporator)

Figure 3-51. Toggle Through Temperature Readings - Press Either

COLDER Key

(“rE” Indicates Refrigerator Evaporator)

ICE

SERVICE

OFF

FREEZER

WARMERCOLDER

REFRIGERATOR

ICE

ON/OFF

UNIT

ON/OFF

ICE

SERVICE

OFF

FREEZER

WARMERCOLDER

REFRIGERATOR

ICE

ON/OFF

UNIT

ON/OFF

SERVICE

ICE

OFF

SERVICE

ICE

OFF

FREEZER

WARMERCOLDER

FREEZER

WARMERCOLDER

REFRIGERATOR

ICE

ON/OFF

UNIT

ON/OFF

REFRIGERATOR

ICE

ON/OFF

UNIT

ON/OFF

Page 36

Electronic Control System

Integrated

(700-

TTALL)

ALL)

Series

3-22

#3758412 - Revision B - December, 2006

Figure 3-52. “EE” Observed in Diagnostic Mode = Thermistor Fault in Location Indicated by Code

Figure 3-53. “Sr” Observed While in Diagnostic Mode = Unit is in Showroom Mode

Diagnostic Mode Indicators

If “EE” is observed in the 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 3-52).

If “Sr” is observed in the left display area when Diagnostic Mode is initiated, the unit is in Showroom Mode, which was explained earlier in this section (See Figure 3-53).

If “EC” is observed in the right display area during Diagnostic Mode, the numbers at left are “Error Codes” (See Figure 3-55 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 3-55. “EC” Observed While in Diagnostic Mode = Error Code (See Table on Following Page)

700TC/I-3 & 736TC/I-3

THERMISTOR LOCATION CODE

Freezer Compartment F

Refrigerator Compartment r

Freezer Evaporator FE

Refrigerator Evaporator rE

700TR-3 & 736TR-3

THERMISTOR LOCATION CODE

Lower Compartment L

Upper Compartment U

Lower Evaporator LE

Upper Evaporator UE

700TF/I-3

THERMISTOR LOCATION CODE

Freezer Compartment F

Freezer Evaporator FE

ICE

SERVICE

OFF

FREEZER

WARMERCOLDER

REFRIGERATOR

ICE

ON/OFF

UNIT

ON/OFF

ICE

SERVICE

OFF

FREEZER

WARMERCOLDER

REFRIGERATOR

ICE

ON/OFF

UNIT

ON/OFF

ICE

SERVICE

OFF

FREEZER

WARMERCOLDER

REFRIGERATOR

ICE

ON/OFF

UNIT

ON/OFF

Page 37

Integrated

(700-

TTALL)

ALL)

Series

Electronic Control System

3-23

#3758412 - Revision B - December, 2006

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

30 Excessive Icemaker Water Valve Solenoid Activation (Exceeded 15 Seconds) 40 Excessive Freezer Compressor Run 50 Excessive Refrigerator Compressor Run

NOTE: The table above will be updated through addendums when subsequent software and electrical changes

occur and more error codes are added.

Clearing Error Codes

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 3-56). 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 (15) seconds. The control will emit a short “beep” when the SERVICE annunciator and error codes are cleared. (See Figure 3-57)

Figure 3-57. Clear Non-flashing SERVICE Annunciator - Press & Hold Bell ON/OFF Key for 15 Seconds

Figure 3-56. Non-flashing SERVICE Annunciator after Diagnostic Mode = Error Codes were Registered

Press and hold for 15 seconds

BBEEEEPP!!

SERVICE

FREEZER

WARMERCOLDER

REFRIGERATOR

ICE

ON/OFF

UNIT

ON/OFF

FREEZER

WARMERCOLDER

REFRIGERATOR

ICE

ON/OFF

UNIT

ON/OFF

Page 38

Electronic Control System

Integrated

(700-

TTALL)

ALL)

Series

3-24

#3758412 - Revision B - December, 2006

Figure 3-58. Initiate Manual Component Activation Mode -

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

Manual Component Activation Mode

Manual Component Activation Mode allows a Service Technician to energize a cooling system for five minutes. When activated, the chosen zone’s compressor and evaporator fan are energized along with the condenser fan. While in Component Activation Mode, the evaporator temperatures for that zone 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 zone COLDER key and the UNIT ON/OFF key for ten seconds (See Figure 3-58). 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.

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

ICE

ON/OFF

UNIT

ON/OFF

Page 39

Integrated

(700-

TTALL)

ALL)

Series

Electronic Control System

3-25

#3758412 - Revision B - December, 2006

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, 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).

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 3-59). 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 3 second intervals (See Figure 3-60).

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

Press and Hold Desired

WARMER Key, Then Press UNIT ON/OFF Key

Figure 3-60. 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

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).

FREEZER

WARMERCOLDER

REFRIGERATOR

ICE

ON/OFF

UNIT

ON/OFF

FREEZER

WARMERCOLDER

REFRIGERATOR

ICE

ON/OFF

UNIT

ON/OFF

FREEZER

WARMERCOLDER

REFRIGERATOR

ICE

ON/OFF

UNIT

ON/OFF

FREEZER

WARMERCOLDER

REFRIGERATOR

ICE

ON/OFF

UNIT

ON/OFF

Page 40

Electronic Control System

Integrated

(700-

TTALL)

ALL)

Series

3-26

#3758412 - Revision B - December, 2006

Figure 3-65. Initiate Temperature Log Recall Mode To View Temperature History -

Press and Hold Desired

WARMER Key and UNIT ON/OFF Key

UNIT

ICE

REFRIGERATOR

ON/OFF

WARMERCOLDER

FREEZER

WARMERCOLDER

Figure 3-63. Initiate Diagnostic Mode - Press and Hold Either COLDER Key, then the UNIT ON/OFF Key

Figure 3-64. 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 - Begin with the unit ON and in Diagnostic Mode (See Figure 3-63). While in Diagnostic Mode, toggle through the readings until the desired thermistor temperature is displayed on the LCD (See Figure 3-64). Now, press the WARMER key for that compartment and the UNIT ON/OFF key simultaneously (See Figure 3-65). 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 2-hour temperature average (See Figure 3-65). The right display area will also flash the thermistor location code at three second intervals (See Figure 3-66).

To toggle up

through the indexes (from 1 to 168), press the same WARMER key in multiple key strokes (See Figure 3-67). To toggle down through the indexes (from 168 to 1), press the corresponding COLDER key in multiple key strokes (See Figure 3-68).

Figure 3-66. Thermistor Location Code Flashes Every Three Seconds

Figure 3-67. Toggle Up Through Indexes - Press WARMER Key in Consecutive Key Strokes

Figure 3-68. Toggle Down Through Indexes - Press COLDER Key in Consecutive Key Strokes

ICE

SERVICE

OFF

FREEZER

WARMERCOLDER

REFRIGERATOR

ICE

ON/OFF

UNIT

ON/OFF

ICE

SERVICE

OFF

FREEZER

WARMERCOLDER

REFRIGERATOR

ICE

ON/OFF

UNIT

ON/OFF

FREEZER

WARMERCOLDER

REFRIGERATOR

ICE

ON/OFF

UNIT

ON/OFF

FREEZER

ICE

ON/OFF

ICE

ON/OFF

WARMERCOLDER

REFRIGERATOR

UNIT

ON/OFF

UNIT

ON/OFF

Page 41

Integrated

(700-

TTALL)

ALL)

Series

Electronic Control System

3-27

#3758412 - Revision B - December, 2006

Figure 3-70. SERVICE Annunciator Illuminates - Indicates Unit was switched OFF During that Index Period

by Pressing UNIT ON/OFF Key

Figure 3-71. Bell Illuminates - Indicates Power Failure / Interruption During that Index Period

Figure 3-72. 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 Zone 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 Zone Disable Mode has been activated 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 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 Temperature Log Recall Mode Event Indicators

The diagrams below illustrate possible event indicators that may be observed while in Temperature Log Recall Mode. (See Figures 3-69 through 3-72)

Figure 3-69. “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

ICE

ON/OFF

UNIT

ON/OFF

SERVICE

FREEZER

WARMERCOLDER

REFRIGERATOR

ICE

ON/OFF

UNIT

ON/OFF

FREEZER

WARMERCOLDER

REFRIGERATOR

ICE

ON/OFF

UNIT

ON/OFF

FREEZER

WARMERCOLDER

REFRIGERATOR

ICE

ON/OFF

UNIT

ON/OFF

Page 42

Electronic Control System

Integrated

(700-

TTALL)

ALL)

Series

3-28

#3758412 - Revision B - December, 2006

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

Page 43

Integrated

(700-

TTALL)

ALL)

Series

Sealed System Information

4-1

#3758412 - Revision B - December, 2006

SECTION 4

SEALED SYSTEM

INFORMATION

Page 44

Sealed System Information

Integrated

(700-

TTALL)

ALL)

Series

4-2

#3758412 - Revision B - December, 2006

HFC-134a REFRIGERANT SERVICE INFORMATION

The 700-3 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 45

Integrated

(700-

TTALL)

ALL)

Series

Sealed System Information

4-3

#3758412 - Revision B - December, 2006

SEALED SYSTEM REPAIR 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.

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

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 & system is in 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

High Side leak

Low Side Leak

Contaminated Sealed System

Examples: > Burned out compressor > 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 46

Sealed System Information

Integrated

(700-

TTALL)

ALL)

Series

4-4

#3758412 - Revision B - December, 2006

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

Figure 4-1. Compressor

COMPRESSOR

HEATER LOOP

CONDENSER

FILTER-DRIER

Page 47

Integrated

(700-

TTALL)

ALL)

Series

Sealed System Information

4-5

#3758412 - Revision B - December, 2006

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 48

Sealed System Information

Integrated

(700-

TTALL)

ALL)

Series

4-6

#3758412 - Revision B - December, 2006

SEALED SYSTEM REFRIGERANT FLOW DIAGRAMS

Figure 4-7. Models 700TC/I-3 and 736TC/I-3 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 49

Integrated

(700-

TTALL)

ALL)

Series

Sealed System Information

4-7

#3758412 - Revision B - December, 2006

Figure 4-8. Model 700TR-3 and 736TR-3 Refrigerant Flow

Figure 4-9. Model 700TF/I-3 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 50

Sealed System Information

Integrated

(700-

TTALL)

ALL)

Series

4-8

#3758412 - Revision B - December, 2006

Page 51

Integrated

(700-

TTALL)

ALL)

Series

Airflow & Fan Blade Spacing

5-1

#3758412 - Revision B - December, 2006

SECTION 5

AIR FLOW &

FAN BLADE SPACING

Page 52

Airflow & Fan Blade Spacing

Integrated

(700-

TTALL)

ALL)

Series

5-2

#3758412 - Revision B - December, 2006

Figure 5-1. 700TC/I-3 and 736TC/I-3 Air Flow and Fan Blade Spacing

700TC/I-3:

736TC/I-3:

1” ± 3/32” (25.4 mm ± 0.8 mm) 7/8” ± 1/16” (22.2 mm ± 1.6 mm)

7/8” ± 1/16” (22.2 mm ± 1.6 mm)

UPPER FAN MOTOR

Bracket

Blade

Clamp Away From Motor

LOWER FAN MOTOR

Bracket

Clamp Away From Motor

Blade

Page 53

Integrated

(700-

TTALL)

ALL)

Series

Airflow & Fan Blade Spacing

5-3

#3758412 - Revision B - December, 2006

Figure 5-2. 700TR-3 and 736TR-3 Air Flow and Fan Blade Spacing

1” ± 3/32” (25.4 mm ± 0.8 mm)

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

1” ± 3/32” (25.4 mm ± 0.8 mm)

700TR-3:

736TR-3:

1” ± 3/32” (25.4 mm ± 0.8 mm) 7/8” ± 1/16” (22.2 mm ± 1.6 mm)

UPPER FAN MOTOR

Bracket

Blade

Clamp Away From Motor

LOWER FAN MOTOR

FAN MOTOR

Blade

Bracket

Clamp Away From Motor

Blade

Bracket

Clamp Away From Motor

Page 54

Airflow & Fan Blade Spacing

Integrated

(700-

TTALL)

ALL)

Series

5-4

#3758412 - Revision B - December, 2006

Page 55

Integrated

(700-

TTALL)

ALL)

Series

Icemaker Information

6-1

#3758412 - Revision B - December, 2006

SECTION 6

ICEMAKER

INFORMATION

Page 56

Icemaker Information

Integrated

(700-

TTALL)

ALL)

Series

6-2

#3758412 - Revision B - December, 2006

ICEMAKER SYSTEM INFORMATION

The model 700TFI-3 utilizes a Modular ® icemaker, while the models 700TCI-3 and 736TCI-3 utilize either a MidSouth ® Icemaker, or Japan-Servo ® Icemaker.

This section is divided in two parts

ICEMAKER MODEL

PAGES

Modular Icemaker Information (Model 700TFI-3 Only) ........................................................................ 6-3 through 6-5

MidSouth and Japan-Servo Icemaker information (Models 700TCI-3 and 736TCI Only) ................. 6-6 through 6-13

Additional Icemaker System Information

• 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.

• To allow ice to freeze fully and reduce effects of low water pressure, the electronic control system disables the ice-

maker system for 45 minutes after each ice harvest. 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.

• The ice bucket activates a switch when in place. If the ice bucket is not in proper position, ice production will stop.

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

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

Page 57

Integrated

(700-

TTALL)

ALL)

Series

Icemaker Information

6-3

#3758412 - Revision B - December, 2006

Figure 6-1. Modular Icemaker Electrical Schematic

What Happens During Modular Icemaker Ejector Blade Rotation (700TFI-3 ONLY)

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

MODULAR ICEMAKER OPERATION (700TFI-3 ONLY)

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.

Power

(Pink)

Water Valve

Tan

Neutral (White)

Green

Shut-Off

Switch

4400 Ω Timer

Mtr.

On (Dn)

Off (Up)

Contact C

(Holding Switch)

Contact A

(Water Valve)

Contact B

(Heater / Thermostat)

Contact D

(Timer)

Contact A

Contact B

Contact C

Contact D

72 Ω Htr.

Thermostat

Water Valve Energized

7.5 Seconds

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

(about 11:00 o'clock)

Ejector Blade Stop Position

(about 1:30 o'clock)

Start Position

Thermostat Closes

Motor On, Heater On

Thermistor Opens

in This Range of Rotation

Heater Off

Ejector Blade Stalls on Ice

Motor On, Heater On

(1/2 Minute to 5 Minutes

6:00 o'clock (reference)

about 4:00 o'clock)

Page 58

Icemaker Information

Integrated

(700-

TTALL)

ALL)

Series

6-4

#3758412 - Revision B - December, 2006

MODULAR ICEMAKER TEST PROCEDURES (700TFI-3 ONLY)

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 AC power 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 BELOW ARE PERFORMED WITH POWER 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 = Thermostat

L - H = Heater L - M = Motor L - N = AC Line Voltage

V - N = Valve

Page 59

Integrated

(700-

TTALL)

ALL)

Series

Icemaker Information

6-5

#3758412 - Revision B - December, 2006

MODULAR ICEMAKER WATER FILL ADJUSTMENT (700TFI-3 ONLY)

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.

MODULAR ICEMAKER DISASSEMBLY (700TFI-3 ONLY)

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

Modular Assembly

Mounting Screws

Mold Attachment

Screw Access Holes

(2-Phillips Head)

Shut-Off Arm

Retaining

Clips

Thermostat

Page 60

MIDSOUTH AND JAPAN-SERVO ICEMAKER COMPONENTS (700TCI-3 AND 736TCI-3 ONLY)

Following are descriptions that explain the function of each icemaker component. The components are diagramed in Figure 6-7, below.

Support - The support is the housing around the electrical components and wire connections. The support is attached to the ice mold.

Mounting Plate - The drive motor, holding switch, water valve solenoid switch, timing gear, timing cam and water fill adjusting screw are attached to the metal mounting plate. The mounting plate is then attached to the support.

Drive Motor - 115 volts AC supplied to the drive motor causes the motor to operate. The motor has a single output shaft with a small gear. The motor gear drives/spins the timing gear.

Timing Gear - The timing gear is driven/spun by the drive motor gear and is attached to the timing cam.

Timing Cam - The timing cam is attached to the timing gear and the ice ejector is inserted into the center of the timing cam. As the timing cam rotates, high and low spots on the cam operate the water valve solenoid switch and the holding switch. The timing cam also moves the lever arm side to side and rotates the ice ejector.

Ice Mold - The ice mold is where the eight crescent shaped ice cubes are formed.

Mold Heater - The mold heater uses 165 watts to thaw the ice free from the mold.

Ice Ejector - The drive end of the ice ejector is “D” shaped to fit into the “D” shaped hole in the timing cam. It has eight blades which rotate and sweep the ice from the mold cavities during the ejection phase of the cycle.

Ice Stripper - The stripper is attached to the dumping side of the mold, serving as a decorative side cover and it also prevents ice from falling back into the mold.

Bearing / Inlet - The bearing / inlet is attached to the ice mold, opposite the support. Water enters the bearing / inlet and is directed to the ice mold. The bearing/inlet also supports the ice ejector at the end opposite the timing cam.

Thermostat - The thermostat is a single-pole, singlethrow, bi-metal switch. At 15°F (-9°C) ± 3° it closes, starting the ice ejection phase.

Thermal-Mastic - A substance similar in appearance to grease that is applied between the thermostat and the ice mold. Its purpose is to increase thermal conductivity between the mold and the thermostat.

Lever Arm and Shut-off Arm - The lever arm is moved side to side by two revolutions of the timing cam. As it moves, it raises and lowers the shut-off arm and operates the shut-off switch to control the quantity of ice production. If the shut-off arm comes to rest on top of the ice in the storage bin during either revolution, the shut-off switch will remain open, stopping ice production at the end of that revolution.

Water Valve Solenoid Switch - A single-pole, doublethrow type switch that allows electricity to the water valve solenoid, opening the valve, during the fill cycle.

Holding Switch - A single-pole, double-throw type switch that assures completion of a revolution once the icemaker has been energized.

Shut-off Switch - A single-pole, double-throw type switch that stops ice production when the ice bin is full.

TCO (Thermal Cut Out) - The TCO is thermal protection device in the wire harness that would open in the event of mechanical failure, thus protecting against over heating. (The TCO is not shown in diagram.)

Icemaker Information

Integrated

(700-

TTALL)

ALL)

Series

6-6

#3758412 - Revision B - December, 2006

Figure 6-7. Diagram of Icemaker Components

Holding Switch

Support Plate

Timing Gear

Thermostat

Drive Motor

Ice Ejector

(Location of Thermal-Mastic)

Shut-off Switch

Support

Ice Stripper

Ice Mold and Mold Heater

Ice Level Arm

Lever Arm

Bearing / Inlet

Timing Cam

Cover

Water Valve Solenoid Switch

Page 61

Integrated

(700-

TTALL)

ALL)

Series

Icemaker Information

6-7

#3758412 - Revision B - December, 2006

MIDSOUTH AND JAPAN-SERVO ICEMAKER OPERATION (700TCI-3 AND 736TCI-3 ONLY)

The following series of electrical schematics illustrate a typical icemaker cycle of operation. Below each schematic is a diagram indicating the approximate location of the ice ejector and ice level arm during the phase the schematic indicates.

Freeze Phase of Ice Making Cycle (See Figure 6-8)

• The ice mold is filled with water.

• The thermostat is open.

• No icemaker components are energized.

Figure 6-8. The Freeze Phase

Start of the First Revolution (See Figure 6-9)

• The water in the ice mold has turned to ice.

• At 15°F (-9°C) ± 3° the thermostat closes.

• The mold heater is energized through the thermostat.

• The drive motor is started through the thermostat and “normally closed” terminal of the holding switch.

• The ice ejector begins to turn and the shut-off arm begins to rise.

Figure 6-9. Start of First Revolution

115 VOLTS

60 CYCLES

TCO

SHUT-OFF SWITCH

NO NC

SOLENOID SWITCH

NCNCNO

WATER

SOLENOID

APPROXIMATE POSITION

OF ICE EJECTOR AND

ICE LEVEL ARM

DURING OPERATION

THERMOSTAT

HOLDING SWITCH

MOLD HEATER

MOTOR

WATER

ICE MOLD

ICE BUCKET

SHUT-OFF SWITCH

NO NC

SOLENOID SWITCH

NCNCNO

WATER

SOLENOID

APPROXIMATE POSITION

OF ICE EJECTOR AND

ICE LEVEL ARM

DURING OPERATION

115 VOLTS

60 CYCLES

THERMOSTAT

HOLDING SWITCH

ICE

ICE MOLD

TCO

MOLD HEATER

MOTOR

ICE BUCKET

Page 62

Icemaker Information

Integrated

(700-

TTALL)

ALL)

Series

6-8

#3758412 - Revision B - December, 2006

Figure 6-10. First Revolution Continued

First Revolution Continued (See Figure 6-10)

• The holding switch is tripped by the timing cam to “normally open” thus holding power to the motor.

• The mold heater remains energized through the thermostat.

• The shut-off arm begins to rise.

First Revolution Continued (See Figure 6-11)

• The ice ejector reach the ice in the mold.

• The ice releases from the mold as the ejector blades begin to rotate the cubes out.

• The drive motor remains energized through the holding switch.

• The mold heater remains energized through the thermostat.

• As the shut-off arm rises, the shut off switch is tripped to “normally closed”, and then the shut-off arm begins to lower.

Figure 6-11. First Revolution Continued

115 VOLTS

60 CYCLES

TCO

SHUT-OFF SWITCH

NO NC

SOLENOID SWITCH

NCNCNO

WATER

SOLENOID

APPROXIMATE POSITION

OF ICE EJECTOR AND

ICE LEVEL ARM

DURING OPERATION

THERMOSTAT

MOLD HEATER

MOTOR

HOLDING SWITCH

ICE

ICE MOLD

ICE BUCKET

SHUT-OFF SWITCH

NO NC

SOLENOID SWITCH

NCNCNO

WATER

SOLENOID

APPROXIMATE POSITION

OF ICE EJECTOR AND

ICE LEVEL ARM

DURING OPERATION

115 VOLTS

60 CYCLES

THERMOSTAT

HOLDING SWITCH

ICE

ICE MOLD

TCO

MOLD HEATER

MOTOR

ICE BUCKET

Page 63

Integrated

(700-

TTALL)

ALL)

Series

Icemaker Information

6-9

#3758412 - Revision B - December, 2006

Figure 6-12. First Revolution Continued

First Revolution Continued (See Figure 6-12)

• The ice has released from the mold.

• The motor remains energized through the holding switch.

• The shut-off arm is lowered and the shut off switch is tripped to “normally open”.

• The water valve solenoid switch is tripped by the timing cam, but the solenoid is not energized because the thermostat is still closed and energizing the mold heater. (Electric current follows the path of least resistance.)

End of First Revolution (See Figure 6-13)

• The water valve solenoid switch is tripped by the timing cam back to “normally open.”

• The timing cam trips the holding switch to “normally close,” which ends the first revolution, but the thermostat is still closed, so the motor is again started.

• The mold heater remains energized through the thermostat.

Figure 6-13. End of First Revolution

115 VOLTS

60 CYCLES

TCO

SHUT-OFF SWITCH

NO NC

SOLENOID SWITCH

NCNCNO

WATER

SOLENOID

APPROXIMATE POSITION

OF ICE EJECTOR AND

ICE LEVEL ARM

DURING OPERATION

THERMOSTAT

MOLD HEATER

MOTOR

HOLDING SWITCH

ICE

ICE MOLD

ICE BUCKET

SHUT-OFF SWITCH

NO NC

SOLENOID SWITCH

NCNCNO

WATER

SOLENOID

APPROXIMATE POSITION

OF ICE EJECTOR AND

ICE LEVEL ARM

DURING OPERATION

115 VOLTS

60 CYCLES

THERMOSTAT

HOLDING SWITCH

ICE

ICE MOLD

TCO

MOLD HEATER

MOTOR

ICE BUCKET

Page 64

Icemaker Information

Integrated

(700-

TTALL)

ALL)

Series

6-10

#3758412 - Revision B - December, 2006

Figure 6-14. Start of Second Revolution

Start of Second Revolution (See Figure 6-14)

• The water valve solenoid switch is tripped by the timing cam back to “normally open.”

• The timing cam trips the holding switch to “normally close,” which ends the first revolution, but the thermostat is still closed, so the motor is again started.

• The mold heater remains energized through the thermostat.

Second Revolution Continued (See Figure 6-15)

• The mold heater has warmed the thermostat, so the thermostat opens, and the mold heater is de-energized.

• If the shut-off arm comes to rest on top of the ice in the storage bin (as illustrated), so the shut-off switch will remain in the “normally closed” position.

• The motor remains energized through the holding switch.

Figure 6-15. Second Revolution Continued

115 VOLTS

60 CYCLES

TCO

SHUT-OFF SWITCH

NO NC

SOLENOID SWITCH

NCNCNO

WATER

SOLENOID

APPROXIMATE POSITION

OF ICE EJECTOR AND

ICE LEVEL ARM

DURING OPERATION

THERMOSTAT

MOLD HEATER

MOTOR

HOLDING SWITCH

ICE

ICE MOLD

ICE BUCKET

SHUT-OFF SWITCH

NO NC

SOLENOID SWITCH

NCNCNO

WATER

SOLENOID

APPROXIMATE POSITION

OF ICE EJECTOR AND

ICE LEVEL ARM

DURING OPERATION

115 VOLTS

60 CYCLES

THERMOSTAT

HOLDING SWITCH

ICE MOLD

MOLD HEATER

ICE BUCKET

ICE

TCO

MOTOR

ICE

Page 65

Integrated

(700-

TTALL)

ALL)

Series

Icemaker Information

6-11

#3758412 - Revision B - December, 2006

Figure 6-16. Second Revolution Continued

Second Revolution Continued (See Figure 6-16)

• The water valve solenoid switch is tripped by the timing cam. This time the solenoid is energized because the thermostat is open. The water solenoid is open for approximately seven seconds, filling the ice mold with water.

• the mold heater is energized through the solenoid switch and holding switch.

Figure 6-17. End of Ice Making Cycle

End of Ice making Cycle (See Figure 6-17)

• The water valve solenoid switch is tripped by the timing cam back to “normally open” ending the water fill.

• The timing cam trips the holding switch to “normally close,” which ends the second revolution.

• The thermostat is still open, so it does not start the drive motor.

• If the shut-off arm has come to rest on top of the ice in the storage bin (as illustrated), the shut-off switch remains in the “normally closed” position. This interrupts power from reaching the thermostat, until sufficient ice has been removed from the storage bin allowing the shut-off arm to lower.

NOTE: 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.

115 VOLTS

60 CYCLES

TCO

SHUT-OFF SWITCH

NO NC

SOLENOID SWITCH

NCNCNO

WATER

SOLENOID

APPROXIMATE POSITION

OF ICE EJECTOR AND

ICE LEVEL ARM

DURING OPERATION

THERMOSTAT

MOLD HEATER

MOTOR

HOLDING SWITCH

ICE MOLD

ICE BUCKET

ICE

SHUT-OFF SWITCH

NO NC

SOLENOID SWITCH

NCNCNO

WATER

SOLENOID

APPROXIMATE POSITION

OF ICE EJECTOR AND

ICE LEVEL ARM

DURING OPERATION

115 VOLTS

60 CYCLES

THERMOSTAT

HOLDING SWITCH

WATER

ICE MOLD

MOLD HEATER

ICE BUCKET

TCO

MOTOR

ICE

Page 66

Icemaker Information

Integrated

(700-

TTALL)

ALL)

Series

6-12

#3758412 - Revision B - December, 2006

Figure 6-18. Stopping Icemaker

MANUALLY STOPPING ICE PRODUCTION

Ice production can be manually stopped three ways:

1. Press the ICE ON/OFF key on the control panel so that “ICE” is not displayed on the LCD.

2. Remove ice bucket so that icemaker switch behind the ice bucket is not being depressed. Also, make sure no food product is coming in contact with icemaker switch.

3. Position the ice-level/shut-off arm in the up/OFF position (See Figure 6-18).

MANUALLY STARTING THE ICEMAKER

NOTE: To allow ice to freeze fully and reduce effects of low water pressure, the electronic control disables the icemaker system for 45 minutes after each ice harvest. To bypass this 45 minute dwell for service purposes, press the the ICE ON/OFF key at the control panel.

Manual S

tart Procedure:

1. Pry the icemaker front cover from the support using a flat-blade screwdriver or coin.

2. With a flat-blade screwdriver, turn the drive gear counterclockwise until the holding switch is activated, completing the circuit to the drive motor (this will be about a 1/8 turn). (See Figure 6-19) The icemaker will then complete its cycle automatically.

NOTE: If after 1/4 turn the icemaker is not running on its own, it may be in the 45 minute dwell period or there is an electrical or mechanical problem.

ADJUSTING ICEMAKER WATER FILL LEVEL

Proper water fill level for a MidSouth icemaker is 100 110 cc’s (3.5 - 3.75 oz). If the fill level is checked and needs to be adjusted, turn the water fill adjusting screw clockwise to reduce fill level, or counterclockwise to increase fill level. One full turn of the screw equals 15 cc’s. (See Figure 6-20)

NOTE: Always check fill level before making any adjustments of the water fill adjusting screw.

Figure 6-19. Manually Start Icemaker

Figure 6-20. Adjust Water Fill Level

Turn Drive Gear

Counterclockwise

Arm DOWN,

Icemaker will Operate

Arm UP,

Icemaker will Stop

Water Fill Adjusting Screw

1 Full Turn Equals 15 CC's

Turn Clockwise to Reduce Fill

Page 67

Integrated

(700-

TTALL)

ALL)

Series

Icemaker Information

6-13

#3758412 - Revision B - December, 2006

ICEMAKER FAULT TESTING

Bypass 45-minute dwell by pressing ICE ON/OFF key to OFF then ON. Then depress icemaker switch & manually start icemaker by turning driver gear counter-clockwise with screwdriver.

1 If icemaker starts & finishes cycle:

(NOTE: If >15°F (-9°C), icemaker will only complete 1 revolution.)

a. Visually inspect electrical connections at icemaker &

valve. Repair if necessary.

b. Check valve operation with test cord, if doesn't open,

replace.

c. Check thermostat. Open: 48° (9°C) ± 6°, Close: 15°

(-9°C) ± 3°. Replace icemaker if defective.

d. With icemaker in park position, check solenoid switch

terminals "C" & "NO" for continuity. With ejector between 8:00 & 10:00 position, check solenoid switch terminals "C" & "NC" for continuity. If no continuity for either terminal check, replace icemaker.

2. If icemaker starts but does not finish cycle:

a. With icemaker in park position check holding switch ter-

minals "C" & "NC" for continuity. Then with icemaker ejector between 10:00 & 12:00, check holding switch terminals "C" & "NO" for continuity. If no continuity for either terminal check, replace icemaker. (Refer to enclosed wiring diagram)

b. With icemaker in park position check shut-off switch

terminals "C" & "NO" for continuity. With ejector between 12:00 & 2:00 check shut-off switch terminals "C" & "NC" for continuity. If no continuity for either terminal check, replace icemaker.

c. Check mold heater for 75-85Ω. If outside range,

replace icemaker.

3 If icemaker motor does NOT start:

a. Lower shutoff arm b. Check motor operation with test cord. If motor doesn't

run, replace icemaker.

c. Check power to & from icemaker switch. Reconnect or

repair connection or replace icemaker as necessary.

d. Check for 115V AC from control board. If power is pres-

ent check & repair connection. If no power, replace control board.

QUICK REFERENCE

• Water Fill Time - 6.3±.2 seconds

• Fill Tube Heater Ohm - 2850-3890Ω

• Mold Heater Ohm - 75-85Ω

• Water Valve Ohm - 160-165Ω

• Thermostat - Open: 48° (9°C) ± 6°, Close: 15° (-9°C) ± 3°.

• Water Pressure Needed - 20-100 psi constant

Possible Problems

No / Slow Ice Production

1 Ice maker system switched OFF. Switch ice system ON. 2 Shut off arm in up/OFF position. Move to ON position. 3 Freezer too warm. Check temp’s & see troubleshooting

guide in service manual. 4 Poor airflow over icemaker. Remove obstructions. 5 Ice cube jam. Remove ice & check water fill setting.

a. Water fill setting too low (< 6.5 sec’s). Adjust setting.

b. Water fill setting too high (> 7 sec’s). Adjust setting. 6 Water froze in inlet tube. Remove ice from tube. Check

for 115VAC from control board; Fill tube heater = 2850-

3890Ω. 7 Water supply not constant 20-100 psi. Instruct customer. 8 Water line to unit pinched/kinked. Repair water line. 9 Saddle valve not installed correctly to supply line.

Reposition. 10 Saddle valve not fully open. Open valve fully. 11 Icemaker wire/connections loose/broken. Repair wiring. 12 Water valve wire/connections loose/broken. Repair wiring. 13 Defective water valve. Check valve (160-165Ω), Replace

valve. 14 Thermostat wire/connections loose/broken. Repair wiring. 15 TCO overheat or short. Replace icemaker. 16 See Icemaker Fault Testing.

No W

ater Fill

1 Water supply switched OFF. Switch supply water line ON. 2 Water line to unit pinched/kinked. Repair water line. 3 Saddle valve not installed correctly to supply line.

Reposition. 4 Water froze in inlet tube. Remove ice from tube. Check

for 115VAC from control board; Fill tube heater = 2850-

3890Ω. 5 Water valve wire/connections loose/broken. Repair wiring. 6 Defective water valve. Check valve (160-165Ω), Replace

valve.

Overflows / Ice Block Forms in Bucket / Oversized Cubes

1 Icemaker not level. Level icemaker. 2 Unit not level. Level unit 3 Water supply not constant 20-100 psi. Instruct customer. 4 Water fill setting too high (> 7 sec’s). Adjust setting. 5 Water fill setting too low (< 6.5 sec’s). Adjust setting. 6 Defective water valve. Check valve (160-165Ω), Replace

valve.

Ice Cubes Hollow or Small

1 Icemaker not level. Level icemaker. 2 Unit not level. Level unit 3 Water supply not constant 20-100 psi. Instruct customer. 4 Water fill setting too low (< 6.5 sec’s). Adjust setting. 5 Too little thermalmastic on thermostat. Add thermalmastic. 6 Defective thermostat (Open: 48° (9°C) ± 6°, Close: 15°

(-9°C) ± 3°. Replace icemaker if defective.

oo much Ice

1 Shut off arm/linkage bent/broken. Repair or replace

arm/linkage. 2 If ejector blades rotate with arm in up/OFF position -

Icemaker faulty. Replace icemaker.

Page 68

Icemaker Information

Integrated

(700-

TTALL)

ALL)

Series

6-14

#3758412 - Revision B - December, 2006

Page 69

Integrated

(700-

TTALL)

ALL)

Series

Component Access/Removal

7-1

#3758412 - Revision B - December, 2006

SECTION 7

COMPONENT ACCESS

AND REMOVAL

Page 70

Component Access/Removal

Integrated

(700-

TTALL)

ALL)

Series

7-2

#3758412 - Revision B - December, 2006

COMPONENT ACCESS AND REMOVAL

This section explains how to adjust, access and remove components in and from 700-3 Tall Series 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. This section is 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. 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, POWER 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 71

Integrated

(700-

TTALL)

ALL)

Series

Component Access/Removal

7-3

#3758412 - Revision B - December, 2006

EXTERIOR COSMETIC AND MECHANICAL COMPONENTS

Kickplate/Grille Removal (All Models)

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 kickplate/grille, extract screws (two each side) and pull kickplate/grille forward. (See Figure 7-1)

Side Molding Strip Removal (All Models)

Side molding strips are held in place by four unit-to-cabinet brackets attached to the sides of the cabinet.

NOTE: Remove drawers first to make this task easier.

To remove the side trim molding strips (See Figure 7-2):

1. Place a straight-blade screwdriver in channel at bottom of molding. Gently pull molding forward until face-frame edge of molding is accessible.

2. Place another straight-blade screwdriver under face-frame edge and gently work molding away from face-frame, and off of unit-to-cabinet brackets.

Upper Compartment Light Switch & Fan Switch Removal (All Models)

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

NOTE: The switch with white back is for the lights and the switch with black back is for the evaporator fan.

To access and remove a light and/or fan switch (See Figure 7-3):

1. Remove side molding strips.

2. Pull top of top molding forward, then lift up.

3. Extract screws from switch bracket and pull bracket forward.

4. Disconnect electrical leads from switch being removed.

5. Depress tabs on side of switch and push switch out of 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

To p Molding

Side Molding

Page 72

Component Access/Removal

Integrated

(700-

TTALL)

ALL)

Series

7-4

#3758412 - Revision B - December, 2006

Drawer Assembly Removal (All Models)

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.

To remove a drawer assembly (See Figure 7-4):

1. Pull drawer open. Lift front of drawer up and off of pins at front end of drawer slides.

2. Pull drawer assembly forward and off of drawer slides.

3. Push telescoping drawer slide assemblies back in.

Door & Drawer Gasket Removal (All Models)

The door and drawer gaskets are pressed into retaining channels that are molded into 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)

Figure 7-4. Drawer Assembly Removal

Hole in Channel

Drawer Slide

Drawer Assembly

Figure 7-5. Gasket Removal

Door Gasket

Channel

Page 73

Integrated

(700-

TTALL)

ALL)

Series

Component Access/Removal

7-5

#3758412 - Revision B - December, 2006

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 Assembly Removal (All Models)

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, then 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 (See Figure 7-6):

1. Open door and removing both hinge covers.

2. With Allen-head wrench, extract the two inner-most

door mounting screws from top and bottom hinge arms, leaving the two outer-most screws in place.

3. Close door and extract the outer-most door mount-

ing screws from bottom hinge arm.

4. Extract the two outer-most door mounting screws

from top hinge arm.

5. Lift door from unit.

Upper and Lower Hinge Assembly Removal (All Models)

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)

Figure 7-7. Hinge Assembly Removal

Hinge Arm

Bolt

Page 74

Component Access/Removal

Integrated

(700-

TTALL)

ALL)

Series

7-6

#3758412 - Revision B - December, 2006

INTERIOR COSMETIC, MECHANICAL AND ELECTRICAL COMPONENTS

Door Shelf and Dairy Compartment Adjustment / Removal (All Models)

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 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 Models)

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

Shelf Ladders

Figure 7-8. Door Shelf

Figure 7-9. Compartment Shelf Removal

“L” Shaped

Grooves

Door Shelf

Knobs

Door Liner

Compartment Shelves

Page 75

Integrated

(700-

TTALL)

ALL)

Series

Component Access/Removal

7-7

#3758412 - Revision B - December, 2006

Upper Light Diffuser Removal (All Models)

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 (See Figure 7-10):

1. Slide a finger over the top of each retainer clip

flange and rotate the retainer clip down and back.

2. With clips open, lift the diffuser up and slide it

towards the rear of unit until center of the “T” slots line up with the pegs.

3. Lower diffuser down and pull forward from the unit.

(See Figure 7-11)

Light Bulb Removal (All Models)

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 7-12)

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 7-12)

Figure 7-10. Upper Light Diffuser Removal

Figure 7-11. Upper Light Diffuser Removal

Retaining Clip

“T” Slots

Figure 7-12. Light Bulb Removal

counterclockwise to remove

Line-up Slots with Pegs

Page 76

Component Access/Removal

Integrated

(700-

TTALL)

ALL)

Series

7-8

#3758412 - Revision B - December, 2006

Figure 7-13. Control Board And Control Panel

Figure 7-14. Control Board Removal

Control Board

Control Panel

Ta b

Forward Tabs

Control Board

Control Board Removal (All Models)

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 control board, the light diffuser must be removed first, then (See Figures 7-13 & 7-14):

1. Extract screws securing control enclosure to ceiling of the compartment. Lower the back of enclosure while pulling it toward rear of unit.

2. Disconnect all electrical leads from control board.

3. Expand the two tabs at middle of control board outward while pulling the back of board down slightly. Then, expand the two forward tabs that hold the LCD in position outward. Now, pull control board down and toward rear of unit.

Control Panel Assembly Removal (All Models)

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.

1. Extract rear mounting screws from control panel.

2. Push panel toward rear of unit to release the front screws from key-hole slots, then lower panel down and pull out of unit. (See Figure 7-15)

Figure 7-15. Control Panel Removal

Mounting Screws

Key-Hole Slots

Control Panel

Evap Fan Shroud

Assembly

Page 77

Integrated

(700-

TTALL)

ALL)

Series

Component Access/Removal

7-9

#3758412 - Revision B - December, 2006

Upper Evaporator Cover / Air Duct Removal

(All Models)

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 (See Figure 7-16):

1. Extract screws at top of evaporator cover.

2. Tilt cover forward and lift out of unit.

Upper Evaporator Fan Shroud Assembly Removal

(All Models)

The evaporator fan shroud assembly, which holds the upper compartment lighting components, is secured to the ceiling with screws.

To access and remove the evaporator fan shroud assembly, first remove the light diffuser and evaporator cover, then (See Figure 7-17):

1. Extract the mounting screws which secure fan

shroud assembly to ceiling of compartment.

2. Lower the assembly and disconnect wire harness.

Figure 7-16. Upper Evaporator Cover Removal

Figure 7-17. Upper Evaporator Fan Shroud Assy

Disconnect Wiring

Screws

Page 78

Component Access/Removal

Integrated

(700-

TTALL)

ALL)

Series

7-10

#3758412 - Revision B - December, 2006

Upper Compartment Evaporator Fan Assembly Removal (All Models)

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 light diffuser, evaporator cover, and evaporator fan shroud assembly, then (See Figure 7-18):

1. Disconnect fan motor wire leads from wire harness.

2. Extract fan assembly mounting screws and remove from unit.

3. 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 Models)

The upper compartment thermistor is behind the evaporator cover, 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 (See Figure 7-19):

1. Extract thermistor mounting screw.

2. Cut thermistor’s wire leads six (6) to twelve (12) inches from the back wall, then pull thermistor from compartment.

Upper Evaporator Thermistor Removal (All Models except 700TF/I-3)

The upper evaporator thermistor is inserted into the third opening in the evaporator fins from the top, approximately to the center of the evaporator.

To access and remove the upper evaporator thermistor, first remove light diffuser and evaporator cover, then (See Figure 7-19):

1. Cut thermistor’s wire leads six (6) to twelve (12) inches from the back wall.

2. Pull thermistor from evaporator fins.

Figure 7-18. Upper Evap Fan Assy

Mounting Screws

Wire Connector

Figure 7-19. Upper Compartment

and Evaporator Thermistors

Upper Compartment Thermistor

Upper Evaporator Thermistor

Page 79

Integrated

(700-

TTALL)

ALL)

Series

Component Access/Removal

7-11

#3758412 - Revision B - December, 2006

Drawer Closer Assembly Removal (All Models)

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

To access and remove a drawer closer assembly, first remove the appropriate drawer. Then, extract the screws that secure the drawer closer to the wall. (See Figure 7-20)

Drawer Slide Assembly Removal (All Models)

The four 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 7-21)

NOTE: The pins at front end of the drawer slides are replaceable. Screw pins counterclockwise to remove them. (See Figure 7-22)

Icemaker Assembly Removal (All Models with Icemakers)

The icemaker is attached to a support plate with 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 Pclamps 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.

To access and remove the icemaker assembly, first remove the bottom drawer, then (See Figure 7-23):

1. Extract mounting screw at bottom and two top

mounting screws.

2. Lower the icemaker assembly down and disconnect

wire harness from back left of icemaker.

3. The icemaker can now be removed from the sup-

port plate by sliding the connecting rod off of the shut-off arm, then extracting the screws from bottom of icemaker.

Drawer Closer Assy

Figure 7-20. Drawer Closer Assembly Removal

Figure 7-21. Drawer Slide Assembly Removal

Drawer Slide Assy

Figure 7-22. Pin Replacement

Figure 7-23. Icemaker Assy

Icemaker

Mounting Screw

Shut-off Arm

Connecting Rod

Page 80

Component Access/Removal

Integrated

(700-

TTALL)

ALL)

Series

7-12

#3758412 - Revision B - December, 2006

Heat Exchanger Cover Removal (All Models)

The heat exchanger cover is held in the back left corner of the lower compartment with screws that go through the cover and into stand-offs. (See Figure 7-24)

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

Lower Evaporator Cover Assembly Removal (Models 700TR-3 & 736TR-3)

NOTE: In these models, the evaporator fan assembly is attached to the lower evaporator cover assembly.

The lower evaporator cover assembly is held in place with screws. The left side mounting screws will be visible after the heat-exchanger cover is removed. Screws on the right side secure the assembly to the switch enclosure, and screws at top secure the assembly to the ceiling of the lower compartment. (See Figure 7-25)

To access and remove lower evaporator cover assembly, first remove drawers, left drawer slides, and heat exchanger cover, then (See Figure 7-25):

1. Extract left side mounting screws.

2. Extract screws from top and right side of assembly.

NOTE: Bottom screw on right side also secures the compartment thermistor.

3. Pull right top front of assembly down slightly and disconnect evaporator fan electrical leads, then pull assembly out through upper drawer opening.

Lower Evaporator Fan Assembly Removal (Models 700TR-3 & 736TR-3)

The lower evaporator fan assembly is held in place by 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 fan bracket.

To access and remove the lower evaporator fan assembly, first remove drawers, left side drawer slides, heat exchanger cover and evaporator cover assembly. Then, extract the bolts from the well-nuts (See Figure 7-

26).

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 7-24. Heat Exchanger Cover Removal

Screw

Figure 7-25. Evaporator Cover Removal, 700TR-3

Evaporator Cover Assembly

Screw

Screws

Screw

Figure 7-26. Evaporator Fan Removal, 700TR-3

Evap Fan Assy

Bolts through Access Holes

Page 81

Integrated

(700-

TTALL)

ALL)

Series

Component Access/Removal

7-13

#3758412 - Revision B - December, 2006

Lower Compartment Thermistor Removal (Models 700TR-3 & 736TR-3)

The lower compartment thermistor in these models is attached at front of the switch enclosure with a screw.

To access and remove the lower compartment thermistor, first remove drawers, left side drawer slides, heat exchanger cover and lower evaporator cover, then (See Figure 7-27):

1. The screw securing compartment thermistor to

switch enclosure will be removed when evaporator cover is removed.

2. Extract switch enclosure mounting screws and pull

enclosure away from back wall.

3. Cut thermistor’s wire leads six (6) to twelve (12)

inches from back wall.

Lower Evaporator Thermistor Removal (Models 700TR-3 & 736TR-3)

The lower evaporator thermistor in these models is inserted into the third opening in the evaporator fins from the top, approximately to the center of the evaporator.

To access and remove the lower evaporator thermistor, first remove drawers, left side drawer slides, heat exchanger cover and lower evaporator cover assembly, then (See Figure 7-27):

1. Cut thermistor’s wire leads six (6) to twelve (12)

inches from the back wall.

2. Pull thermistor from evaporator fins.

Lower Evaporator Cover Assembly Removal (Models 700TC/I-3, 700TF/I-3, 736TC/I-3)

The lower evaporator cover in these models is held in place with screws and a locating peg. The left side mounting screws are hidden by the heat-exchanger cover; screws at top secure evaporator cover to ceiling of lower compartment; a peg protruding from the bottom left side of switch enclosure fits into a hole at bottom right side of evaporator cover.

To access and remove the lower evaporator cover, first remove drawers, left side drawer slides, and heat exchanger cover, as well as icemaker, if applicable, then (See Figure 7-28):

1. Extract left side and top mounting screws.

2. Pull evaporator cover toward left wall to disengage

peg from hole at bottom right, then pull assembly out through upper drawer opening.

Figure 7-28. Evaporator Cover Removal,

Model 736TC/I-3 Shown

Evaporator Cover

Screw

Screws

Screw

Peg (Not Shown)

Figure 7-27. Lower Thermistors, 700TR-3

Evaporator Thermistor

Compartment Thermistor

Switch Enclosure

Page 82

Component Access/Removal

Integrated

(700-

TTALL)

ALL)

Series

7-14

#3758412 - Revision B - December, 2006

Drain Trough Heater Removal (Models 700TC/I-3, 700TF/I-3, 736TC/I-3)

The drain trough heater in the lower compartment 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 drawers, left side drawer slides, heat exchanger cover and the evaporator cover, then (See Figure 7-29):

1. Pull heater up and out of notches in the side brackets, and down and out of notches in middle bracket.

2. Pull heater toward left until electrical connections emerge from behind switch enclosure, then disconnect electrical leads.

Lower Evaporator Fan Shroud Removal (700TC/I-3, 700TF/I-3 & 736TC/I-3)

The lower evaporator fan shroud is attached to the evaporator fan bracket assembly with two screws.

To access and remove the lower evaporator fan shroud, first remove drawers, left side drawer slides, heat exchanger cover and the evaporator cover. Then, extract the screws that pass through the fan shroud into the evaporator fan bracket. (See Figure 7-30)

Lower Evaporator Fan Assembly Removal (700TC/I-3, 700TF/I-3 & 736TC/I-3)

The lower evaporator fan assembly in these models is attached to the upper back wall of the lower compartment with screws.

To access and remove the lower evaporator fan assembly, first remove drawers, left side drawer slides, heat exchanger cover, evaporator cover and the evaporator fan shroud, then (See Figure 7-31):

1. Disconnect fan wire leads from wire harness.

2. Extract fan assembly mounting screws from back wall and pull fan assembly from unit.

NOTE: 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.

Figure 7-31. Fan Assy Removal, 700TC/I-3

Evaporator Fan Assembly

Figure 7-30. Evap Fan Shroud, 700TC/I-3

Screws

Evaporator Fan Shroud

Figure 7-29. Drain Trough Heater

Heater Brackets

Electrical Connections

Drain Trough Heater

2 1

Page 83

Integrated

(700-

TTALL)

ALL)

Series

Component Access/Removal

7-15

#3758412 - Revision B - December, 2006

Figure 7-32. Defrost Terminator,

TC/I-3, TF/I-3

Figure 7-33. Defrost Heater, TC/I-3, TF/I-3

Defrost Terminator Removal

(700TC/I-3, 700TF/I-3 & 736TC/I-3)

The defrost terminator is attached to the second tubing pass from the top of the evaporator.

To access and remove the defrost terminator, first remove drawers, left side drawer slides, heat exchanger cover, evaporator cover and the evaporator fan shroud, then (See Figure 7-32):

1. Extract screws from top of evaporator, then pull top

of the evaporator forward slightly.

2. Disconnect defrost terminator electrical leads.

3. Pull terminator toward back of unit so that clip dis-

engages from evaporator tubing.

NOTE: When reinstalling the defrost terminator, it must be attached to the second tubing pass of the evaporator. Installing 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-3, 700TF/I-3 & 736TC/I-3)

The defrost heater 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 drawers, left side drawer slides, heat exchanger cover, evaporator cover and the evaporator fan shroud, then (See Figure 7-33):

1. Disconnect defrost heater electrical leads.

2. Grab the return bend of heater clips with a needle-

nose pliers and pull that end of clip away from evaporator. Unhook other end of heater clip from evaporator tubing.

3. Cut heater wire near electrical connector and pull

heater from evaporator.

NOTE: When installing replacement heater, do not place heater clips over top heater pass. Doing so will interfere with evaporator fan shroud.

Remove these screws and pull evap forward slightly

Defrost Terminator

Defrost Heater

Pull heater clips off with pliers

2 1

Page 84

Component Access/Removal

Integrated

(700-

TTALL)

ALL)

Series

7-16

#3758412 - Revision B - December, 2006

Figure 7-34. Switch Enclosure Removal

TC/I-3, TF/I-3

Extract Screws

Pull fill tube and heater from wall

Disconnect electrical leads

Switch Enclosure Assembly Removal

(All Models)

Lower switch enclosure assemblies are held at the back right corner of the compartment with screws 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 drawers, left side drawer slides, heat exchanger cover, evaporator cover, as well as the drain trough heater on applicable models, then (See Figure 7-34):

1. Disconnect all electrical leads at the top left side of enclosure.

2. On applicable models, the fill tube and fill tube heater assembly will need to be pulled from the right wall.

3. Extract the switch enclosure mounting screws and pull the assembly from back wall.

Lower Evaporator Thermistor Removal (700TC/I-3, 700TF/I-3 & 736TC/I-3)

A screw secures the lower evaporator thermistor to the right side of the evaporator, just behind the top tubing passes.

To access and remove the lower evaporator thermistor, first remove drawers, left side drawer slides, heat exchanger cover, lower evaporator cover and the switch enclosure, then (See Figure 7-35):

1. Extract screw from clamp holding thermistor to the right evaporator bracket.

2. Cut thermistor’s wire leads six (6) to twelve (12) inches from the back wall, then pull thermistor from compartment.

Figure 7-35. Evaporator Thermistor, TC/I-3, TF/I-3,

Evaporator Thermistor

Page 85

Integrated

(700-

TTALL)

ALL)

Series

Component Access/Removal

7-17

#3758412 - Revision B - December, 2006

Figure 7-38. Lower Compartment Switch Removal

Depress tabs on switch and push from the enclosure

Lower Compartment Thermistor Removal (700TC/I-3, 700TF/I-3 & 736TC/I-3)

The lower compartment thermistor in these models is attached to the back wall with a screw.

To access and remove the lower compartment thermistor, first remove drawers, left side drawer slides, heat exchanger cover, lower evaporator cover and the switch enclosure, then (See Figure 7-36):

1. Extract screw from clamp holding thermistor to the

back wall.

2. Cut thermistor’s wire leads six (6) to twelve (12)

inches from the back wall, then pull thermistor from compartment.

Fill Tube Heater Removal (700TC/I-3, 700TF/I-3 & 736TC/I-3)

The fill tube heater wraps around the fill tube. The heater electrical connections are behind the switch enclosure.

To access and remove the fill tube heater, first remove drawers, left side drawer slides, heat exchanger cover, lower evaporator cover and the switch enclosure, then (See Figure 7-37)

1. Disconnect the heater’s electrical leads.

2. Push the wire grommet from hole in switch enclo-

sure and pull heater wiring through slot in side of switch enclosure.

3. Pull heater off of fill tube.

Lower Compartment Light / Fan / Icemaker Switch Removal (All Models)

The light switches, fan switches and icemaker switch in the lower compartment 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 drawers, left side drawer slides, heat exchanger cover, lower evaporator cover and the switch enclosure, then (See Figure 7-38):

1. Disconnect electrical leads from switch being

removed.

2. Depress tab on side of switch and push switch out

from enclosure.

Figure 7-36. Lower Compartment Thermistor

TC/I-3, TF/I-3

Figure 7-37. Fill Tube Heater, TC/I-3, TF/I-3

Thermistor

Push grommet from hole

Fill Tube & Heater

Pull wires through slot

2 1

Page 86

Component Access/Removal

Integrated

(700-

TTALL)

ALL)

Series

7-18

#3758412 - Revision B - December, 2006

COMPRESSOR AREA ELECTRICAL AND MECHANICAL COMPONENTS

Icemaker Water Valve Removal (700TC/I-3, 700TF/I-3 & 736TC/I-3)

The icemaker water valve assembly is located at the right side of the compressor area next to the condenser, and is attached to the valve bracket with screws.

NOTE: Before accessing the icemaker water valve, turn off water supply to the unit.

To remove the water valve, the kickplate/grill will need to 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 7-39), then (See Figure 7-40):

1. Disconnect inlet water tube from the valve inlet by pushing collar around tube toward valve, while pulling inlet water tube away from valve.

2. With a Phillips screwdriver, remove screws from valve bracket.

3. Lower valve and pull forward.

4. Disconnect valve electrical leads.

5. Disconnect outlet tube from the valve outlet by pushing collar around tube toward valve, while pulling outlet water tube away from valve.

Figure 7-40. Water Valve Removal, TC/I-3,TF/I-3

Outlet Tube

Mounting Screws

Inlet Tube

Electrical Leads

Water Valve

Figure 7-39. Sliding Unit Tray Out

Screw

Page 87

Integrated

(700-

TTALL)

ALL)

Series

Component Access/Removal

7-19

#3758412 - Revision B - December, 2006

Condenser Fan Assembly Removal

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 7-41)

NOTE: It may be necessary to disconnect the compressor electrical leads in order to pull the tray out far enough to access the condenser fan assembly.

1. Disconnect condenser fan motor electrical leads.

(See Figure 7-42)

2. Extract screws at the top of the fan shroud and lift

the shroud with motor, up off of the pegs located on unit tray. (See Figure 7-42)

3. Remove condenser fan from shroud by extracting

the 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 7-43)

4. To remove fan blade from the fan motor, grab the

blade and motor while turning the nut counterclockwise. Then pull the blade from motor shaft. (See Figure 7-43)

Figure 7-42. Condenser Fan Shroud Removal

Figure 7-43. Condenser Fan Assembly

Figure 7-41. 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 88

Component Access/Removal

Integrated

(700-

TTALL)

ALL)

Series

7-20

#3758412 - Revision B - December, 2006

SEALED SYSTEM COMPONENTS

Upper Refrigerator Compartment Evaporator Removal (All Models except 700TF/I-3)

The upper evaporator 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 (See Figure 7-44):

1. Extract screws securing evaporator to the back wall.

2. With a tube cutter, cut inlet tube approximately one inch from the end and cut the outlet tube approximately two inches from the end.

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

The lower evaporator 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-3 & 736TC/I-3, the evaporator fan shroud will also need to be removed, then (See Figure 7-45):

1. Extract screws securing evaporator to back wall.

2. 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.

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: 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.

Figure 7-45. Lower Evaporator Removal

Figure 7-44. Upper Evaporator Removal

Remove Screws

Cut here

Remove Screws

Cut here

Page 89

Integrated

(700-

TTALL)

ALL)

Series

Component Access/Removal

7-21

#3758412 - Revision B - December, 2006

High-Side Filter-Drier Removal

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, evacuate 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 7-46)

NOTE: It may be necessary to disconnect the compressor electrical leads in order to pull the tray out far enough to access the filter-driers.

1. Remove a filter-drier by cutting the cable tie which

secures filter-driers to the bracket. (See Figure 7-

47)

2. With file edge, score a line around capillary tube

approximately one inch from filter-drier outlet, then fatigue capillary tube at this line until it separates.

3. With a tube cutter, cut the inlet tube approximately

one inch from filter-drier.

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 7-48) When installing a new filter-drier, be sure to thoroughly clean the tubing before brazing.

Figure 7-46. Sliding Unit Tray Out

Screw

Figure 7-47. Filter-Drier Removal

Figure 7-48. 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 90

Component Access/Removal

Integrated

(700-

TTALL)

ALL)

Series

7-22

#3758412 - Revision B - December, 2006

Compressor Removal

The compressors have four rubber compressor grommets inserted into their base. Cylindrical metal spacers are placed over threaded studs that are pressed into 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 tray to the unit, located at the front right and left corners. Grab the front flange of tray and pull forward.

1. Use a flat-blade screwdriver to remove compressor electrical cover.

2. Disconnect electrical leads from compressor. (See Figure 7-49)

3. Remove compressor by cutting the inlet and outlet tubing with a tube cutter, approximately one inch from the compressor ports. (See Figure 7-50)

4. Extract nuts and washers from the threaded studs, then lift compressor off of studs. (See Figure 7-50)

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 thoroughly clean the tubing before brazing.

Figure 7-49. Removing Compressor Electrical Cap

Figure 7-50. Compressor Removal

Pry up with screwdriver

Cut here

Compressor

Remove nuts and washers

Page 91

Integrated

(700-

TTALL)

ALL)

Series

Component Access/Removal

7-23

#3758412 - Revision B - December, 2006

Condenser Removal

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 tray to the unit, located at the front right and left corners. Grab the front flange of tray and pull forward. (See Figure 7-51)

NOTE: It will be necessary to disconnect compressor electrical leads in order to pull the tray out far enough to remove the condenser.

1. Remove condenser by cutting the inlet and outlet

tubes to and from the condenser, approximately one inch from the weld joints.

2. Prop front of the unit tray up and drill out the rivets

securing condenser to unit tray. (See Figure 7-52)

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 7-51. Sliding Unit Tray Out

Screw

Figure 7-52. Condenser Removal

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

Condenser

Page 92

Component Access/Removal

Integrated

(700-

TTALL)

ALL)

Series

7-24

#3758412 - Revision B - December, 2006

Upper Compartment Heat Exchanger Removal

The upper compartment heat exchanger 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 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, left side drawer slides, 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 compressor electrical leads in order to pull the tray out far enough to access and remove the heat exchanger.

1. Begin removing heat exchanger by cutting the inlet and outlet tubes at evaporator. (See Figure 7-53)

2. Cut suction line approximately two inches from compressor. (See Figure 7-54)

3. Since the filter-drier will be replaced at the same time, cut drier inlet tube approximately one inch from drier, leaving capillary tube attached. (See Figure 7-55)

4. The heat exchanger will be scrapped, so use a tin snips or similar tool to cut heat exchanger near hole in mullion and hole in floor of the lower compartment. (See Figure 7-53)

5. Pull the pieces of heat exchanger out and clear the Hot-Melt away from 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 replacement heat exchanger, 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 7-53. Cut Inlet and Outlet at Evaporator

Cut here

Figure 7-54. Cut Suction line at compressor

Cut here

Compressor

Figure 7-55. Cut Inlet to Filter-Drier

Cut cable tie

Leave capillary tube attached to drier

Cut 1” from drier

Heat Exchanger

Hole through mullion

Page 93

Integrated

(700-

TTALL)

ALL)

Series

Component Access/Removal

7-25

#3758412 - Revision B - December, 2006

Figure 7-56. Cut Inlet and Outlet at Evaporator

Cut here

Hole through floor

Heat Exchanger

Figure 7-57. Cut Suction line at compressor

Cut here

Compressor

Figure 7-58. Cut Inlet at Filter-Drier

Cut cable tie

Leave capillary tube attached to drier

Cut 1” from drier

Lower Compartment Heat Exchanger Removal

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, left side drawer slides, 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 compressor electrical leads in order to pull the tray out far enough to access and remove the heat exchanger.

1. Begin removing heat exchanger by cutting the inlet

and outlet tubes at evaporator. (See Figure 7-56)

2. Cut the suction line approximately two inches from

compressor. (See Figure 7-57)

3. Since the filter-drier will be replaced at the same

time, cut drier inlet tube approximately one inch from drier, leaving capillary tube attached. (See Figure 7-58)

4. The heat exchanger will be scrapped, so use a tin

snips or similar tool to cut heat exchanger near hole in floor of the lower compartment.

5. Pull the pieces of heat exchanger out and clear the

Hot-Melt away from 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 replacement heat exchanger, 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.

Page 94

Component Access/Removal

Integrated

(700-

TTALL)

ALL)

Series

7-26

#3758412 - Revision B - December, 2006

Page 95

Integrated

(700-

TTALL)

ALL)

Series

Troubleshooting Guides

8-1

#3758412 - Revision B - December, 2006

SECTION 8

TROUBLESHOOTING

GUIDES

Page 96

Troubleshooting Guides

Integrated

(700-

TTALL)

ALL)

Series

8-2

#3758412 - Revision B - December, 2006

TROUBLESHOOTING GUIDES

This section of the manual contains:

• The Error Code Table and Error Code Troubleshooting Guide.

• The General Troubleshooting Guide, which covers all problems that a 700-3 Series unit may experience.

• The Membrane Switch/Ribbon Cable Test Procedures, used to determine if a control panel assembly is defective.

• The Door Hinge Test Procedures and Corrections explain how to test and correct door closing problems.

HOW TO USE THE ERROR CODE TROUBLESHOOTING GUIDE

Error Codes are logged for thermistor errors, and/or defrost system errors. A model 700TF/I-3 may also log error codes for variable speed compressor control system errors. If Error Codes are logged, they will appear when Diagnostic Mode is initiated.

NOTE: If Error Codes appear with a flashing “SERVICE” indicator prior to initiating Diagnostic Mode, the unit experienced excessive compressor run condition that may or may not be associated with the Error Codes displayed.

To initiate Diagnostic Mode, press and hold either

COLDER key, then press the UNIT ON/OFF key, then release both keys. Now, check to see if Error Codes are present, being sure to toggle through all error and temperature readings by pressing either

COLDER key or either

WARMER key. (See Error Code Table Below)

If Error Codes appear, follow the Error Code Troubleshooting Guide on the following page. The left column of the troubleshooting guide lists the error codes. The information in the right column explains what tests to perform and/or what action to take to correct the error.

NOTE: If error codes are observed in diagnostic mode, a non-flashing SERVICE indicator will appear on the LCD when Diagnostic Mode ends indicating error codes are still stored. Error Codes must be manually cleared from the electronic control memory. To clear the non-flashing SERVICE indicator and the error codes, the problem must be corrected and the unit must be ON. Then, press and hold the Door Ajar Alarm Bell ON/OFF key for fifteen (15) seconds. The control will emit a short “beep” when the SERVICE indicator and error codes are cleared.

Error Code Table

CODE INDICATION

30 Excessive Icemaker Water Valve Solenoid Activation (Exceeded 15 Seconds) 40 Excessive Freezer Compressor Run 50 Excessive Refrigerator Compressor Run

Page 97

Integrated

(700-

TTALL)

ALL)

Series

Troubleshooting Guides

8-3

#3758412 - Revision B - December, 2006

NOTE: After repairs, always clear Error Codes by pressing Bell ON/OFF key for 15 seconds.

ERROR CODE TEST / ACTION

a. Check refrigerator compartment thermistor electrical connections and continuity from thermistor to J1

on control board. Reconnect / repair connections.

b. Check resistance of refrigerator compartment thermistor for 30,000 to 33,000 ohms at 32°F (0°C).

Replace if defective.

a. Check refrigerator evaporator thermistor electrical connections and continuity from thermistor to J1 on

control board. Reconnect / repair connections.

b. Check resistance of refrigerator evaporator thermistor for 30,000 to 33,000 ohms at 32°F (0°C).

Replace if defective.

a. Check freezer compartment thermistor electrical connections and continuity from thermistor to J1 on

control board. Reconnect / repair connections.

b. Check resistance of freezer compartment thermistor for 30,000 to 33,000 ohms at 32°F (0°C).

Replace if defective.

a. Check freezer evaporator thermistor electrical connections and continuity from thermistor to J1 on

control board. Reconnect / repair connections.

b. Check resistance of freezer evaporator thermistor for 30,000 to 33,000 ohms at 32°F (0°C). Replace

if defective.

a. With a cold evaporator (< 10°F/ < -12°C), initiate Manual Defrost. If compressor starts 5 minutes after

defrost is initiated, check Grey/White wire connections and continuity from defrost heater to J4-4 on

control board. Reconnect / repair Grey/White wire &/or electrical connections. b. Check for proper ohm readings of defrost heater. Replace heater if defective. c. Check defrost terminator and its electrical connections, Reconnect / repair bad connections or replace

terminator if defective. d. Initiate Manual Defrost, check for 115V AC at E2 on control board. If no voltage, replace board. e. Initiate Manual Defrost, check for 115V AC from E2 (Blue Wire) on control board to defrost terminator.

Reconnect / repair blue wire &/or electrical connections. f. Reference wiring diagram to identify components in same White wire circuit as defrost heater. Check

all White wire electrical connections and continuity from defrost heater to J7-8 on control board.

a. Check for proper mounting and location of freezer evaporator thermistor and defrost heater. Remount

correctly. b. Check for correct wire connection at control board, Blue wire at E2 on control board. If connected to

wrong pin, reconnect correctly. c Check for electrical short of Blue wire to another circuit. Repair Blue wire &/or electrical connections. d. Check for proper operation of defrost terminator: Cut-in 30°F (-1°C) / Cut-out 70°F (21°C). Replace if

defective.

a. Initiate Manual Defrost. If compressor starts 5 minutes after defrost is initiated, check Grey/White wire

connections and continuity from defrost heater to J4-4 on control board. Reconnect / repair

Grey/White wire &/or electrical connections.

a. Check for proper mounting and location of freezer evaporator thermistor and defrost heater. Remount

correctly. b. Check for correct wire connection at control board, Blue wire at E2 on control board. If connected to

wrong pin, reconnect correctly. c Check for electrical short of Blue wire to another circuit. Repair Blue wire &/or electrical connections. d. Initiate Manual Defrost. If compressor starts 5 minutes after defrost is initiated, check Grey/White wire

connections and continuity from defrost heater to J4-4 on control board. Reconnect / repair

Grey/White wire &/or electrical connections.

a. Check for proper ohm readings of defrost heater. Replace heater if defective. b. Check for proper mounting and location of freezer evaporator thermistor and defrost heater. Remount

correctly.

ERROR CODE TROUBLESHOOTING GUIDE

Page 98

Troubleshooting Guides

Integrated

(700-

TTALL)

ALL)

Series

8-4

#3758412 - Revision B - December, 2006

ERROR CODE TEST / ACTION

A. Check for jammed cube in icemaker. B. Reference wiring diagram to identify components in same White wire circuit as water valve solenoid.

Check all White wire electrical connections and continuity from water valve solenoid to J7-8 on control board.

A. If Error Code 07, 20, 21, 22, 23, or 24 is also displayed during Diagnostic Mode, see Test/Actions

under that code.

B. Check for obstructions to freezer door/drawer closing. Remove obstruction. C. Check cleanliness of condenser. Clean if needed. D. Check for obstruction to condenser fan blade or loose fan blade. Remove obstruction/Tighten Blade. E. Check evaporator fan blade position and for obstructions. Reposition if incorrect/Remove obstruction. F. Check resistance of freezer compartment thermistor - 30,000 to 33,000 ohms at 32°F (0°C). Replace

if defective.

G. With unit on, check to see if lights shut off when light switch is depressed. Repair defective wiring or

replace defective switch.

H. With freezer compressor running:

1. (Model 700TF/I Only) Check for 115 V AC from compressor to condenser fan. Repair defective

wiring or replace defective motor.

2. (All Models Except 700TF/I) Check for 115 V AC from control board to condenser fan. Repair

defective wiring, or replace defective motor, or replace defective board.

I. With freezer compressor running and fan switches depressed, check for 115 V AC from compressor to

evaporator fan motor. Repair wiring, or replace defective switch, or replace defective fan motor.

J. Check sealed system for leaks, restrictions or inefficient compressor.

A. If Error Code 05, or 06 is also displayed during Diagnostic Mode, see Test/Actions under that code. B. Check for obstructions to refrigerator door closing. Remove obstruction. C. Check cleanliness of condenser. Clean if needed. D. Check for obstruction to condenser fan blade or loose fan blade. Remove obstruction/Tighten Blade. E. Check evaporator fan blade position and for obstructions. Reposition if incorrect/Remove obstruction. F. Check resistance of refrigerator compartment thermistor - 30,000 to 33,000 ohms at 32°F (0°C).

Replace if defective.

G. With unit on, check to see if lights shut off when light switch is depressed. Repair defective wiring or

replace defective switch.

H. With refrigerator compressor running (All models except 700TF/I) check for 115 V AC from control

board to condenser fan. Repair defective wiring, or replace defective motor, or replace defective board.

I. With refrigerator compressor running and fan switches depressed (All Models Except 700TF/I), check

for 115 V AC from compressor to evaporator fan motor. Repair wiring, or replace defective switch, or replace defective fan motor.

J. Check sealed system for leaks, restrictions or inefficient compressor.

ERROR CODE TROUBLESHOOTING GUIDE

NOTE: After repairs, always clear Error Codes by pressing Bell ON/OFF key for 15 seconds.

Page 99

Integrated

(700-

TTALL)

ALL)

Series

Troubleshooting Guides

8-5

#3758412 - Revision B - December, 2006

HOW TO USE GENERAL TROUBLESHOOTING GUIDE

The General Troubleshooting Guide Table of Contents on the following page indicates how the General Trouble Shooting Guide is arranged. Match the description of the problem the unit is experiencing with those in the table. To the left of the problem description is a letter. Locate that letter in the left column of the Troubleshooting Guide. The information in the center column of the Troubleshooting Guide identifies possible causes for the problem. The information in the right column explains the tests to perform and/or what action to take to correct the problem.

For Problems “A” through “N”

1. Begin troubleshooting by observing the compartment set points.

2. If the set-points are normal, initiate Diagnostic Mode by pressing and holding either

COLDER key, then press

the UNIT ON/OFF key, then release both keys.

3. When Diagnostic Mode is initiated, check to see if “Error Codes” are present, being sure to toggle through all the error and temperature readings by pressing either COLDER key or either WARMER key. (See Thermistor Location Code Tables below.)

4. If Error Codes are present, refer to Error Code Troubleshooting Guide on previous pages.

5. If there are no Error Codes, initiate Manual Component Activation Mode (which lasts five (5) minutes), by pressing and holding the desired

compartment COLDER and UNIT ON/OFF keys for ten (10) seconds, then observe

the evaporator temperatures.

NOTE: Verify that the compressor is operating before observing evaporator temperatures. If the problem is in the refrigerator section, the refrigerator door must be left open for five (5) minutes with the compressor running.

6. After observing the evaporator temperatures as instructed above, take note of the “Pointers” in the first column of the troubleshooting guide under problems “A” through “D”. The “Pointers” list what possible causes to check based on the evaporator temperatures observed.

For

All Problems:

If the unit’s temperature history is needed to help diagnose the problem, initiate Temperature Log Recall Mode as described below. This allows the preceding fourteen days of the unit’s temperature history to be observed.

a. 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.

b. To View Compartment or Evaporator Temperature History: Begin with the unit on and in Diagnostic Mode.

While in Diagnostic Mode, toggle through the readings until the desired thermistor temperature is displayed on the LCD. Now, press the WARMER key for that compartment and the UNIT ON/OFF key simultaneously.

700TC/I-3 & 736TC/I-3

THERMISTOR LOCATION CODE

Freezer Compartment F

Refrigerator Compartment r

Freezer Evaporator FE

Refrigerator Evaporator rE

700TR-3 & 736TR-3

THERMISTOR LOCATION CODE

Lower Compartment L

Upper Compartment U

Lower Evaporator LE

Upper Evaporator UE

700TF/I-3

THERMISTOR LOCATION CODE

Freezer Compartment F

Freezer Evaporator FE

Page 100

Troubleshooting Guides

Integrated

(700-

TTALL)

ALL)

Series

8-6

#3758412 - Revision B - December, 2006

GENERAL TROUBLESHOOTING GUIDE TABLE OF CONTENTS

Ltr Problem Description Page #

A. Error Codes and “SERVICE” Flashing .................................................................................................................................. 8-7

B. “EE” Displayed in Place of Freezer

Temperature with “SERVICE” Flashing ....................................................................... 8-7

C. “EE” Displayed in Place of Refrigerator

Temperature with “SERVICE” Flashing ................................................................ 8-7

D. Warm or Normal Temperatures Displayed with “SERVICE” Alone

Flashing ......................................................................... 8-7

E. Warm or Normal Temperatures Displayed with non-flashing “SERVICE” Displayed ........................................................... 8-7

F. Erratic Temperatures with or without

“SERVICE” Flashing ................................................................................................... 8-7

G. Warm Freezer Compartment Temp. with “SERVICE” Flashing on the LCD ......................................................................... 8-7

H. Warm Freezer Compartment Temp. without

“SERVICE” Flashing on the LCD ..................................................................... 8-9

I. Warm Refrigerator Compartment Temp. with “SERVICE” Flashing on the LCD ................................................................. 8-11

J. Warm Refrigerator Compartment Temp. without

“SERVICE” Flashing on the LCD ............................................................. 8-12

K. Warm or Normal Temp. in Both Compartment with “SERVICE” Flashing on the LCD ....................................................... 8-14

L. Warm Temp. in Both Compartments without “SERVICE” Flashing on the LCD .................................................................. 8-14

M. Product Temp. 10° or More Colder or Warmer than Displayed Temp. ................................................................................. 8-15

N. 1. “Extremely” Cold Temp. Displayed - (1° to 7° in Refrigerator and -21° to -15° in Freezer) .......................................... 8-15

2. If outside U.S. - “Extremely” Warm Temp. Displayed - (34° to 45° in Refrig. and -5° to 5° in Freezer) ........................ 8-15

O. No Ice with "ICE" and “SERVICE” Flashing on LCD ......................................................................................................... 8-15

P. No Ice, "ICE" Displayed on LCD, but not Flashing .............................................................................................................. 8-16

Q. No Ice, "ICE" not Displayed on LCD ................................................................................................................................... 8-17

R. Too Much Ice ....................................................................................................................................................................... 8-17

S. Icemaker Produces Hollow Cubes ...................................................................................................................................... 8-17

T. Icemaker Produces Small Cubes ........................................................................................................................................ 8-17

U. Water in Ice Bucket / Clump of Ice in Ice Bucket ............................................................................................................... 8-17

V. Membrane Switch on Control Board Malfunctioning ........................................................................................................... 8-18

W. No Lighting .......................................................................................................................................................................... 8-18

X. Lights Stay on When Door and/or Drawers Are Closed (May be Accompanied by Door/Drawer Ajar Alarm Bell) .............. 8-19

Y. Door or Drawers Not Able to Close Completely .................................................................................................................. 8-19

Z. Door or Drawers Uneven ..................................................................................................................................................... 8-19

Sealed System Troubleshooting /Diagnostic Tables ................................................................................................................... 8-20

Normal Operating Pressures ................................................................................................................................................ 8-20

Pressure Indications ............................................................................................................................................................. 8-20

Evaporator Temperature / Sealed system Low-side Pressure Correltion .................................................................... 8-21

Control Panel Membrane Switch / Ribbon Cable Test ........................................................................................................... 8-22

Door Hinge Operation Test Procedures and Corrections ..................................................................................................... 8-23