GE ZIS_420DM, ZIS420NM, ZIS_360DM, ZIS360NM, ZIS480NM User Manual

...

GE Consumer Home Services Training

TECHNICAL SERVICE GUIDE

Monogram

Side-By-Side Refrigerators

With Electronic Controls

MODEL SERIES:

ZIS360NM ZIS420NM ZIS480NM ZIS_360DM

ZIS_420DM ZIS_480DM

PUB # 31-9091 03/02

GEA01265

IMPORTANT SAFETY NOTICE

The information in this service guide is intended for use by individuals possessing adequate backgrounds of electrical, electronic, and mechanical experience. Any attempt to repair a major appliance may result in personal injury and property damage. The manufacturer or seller cannot be responsible for the interpretation of this information, nor can it assume any liability in connection with its use.

WARNING

To avoid personal injury, disconnect power before servicing this product. If electrical power is required for diagnosis or test purposes, disconnect the power immediately after performing the necessary checks.

RECONNECT ALL GROUNDING DEVICES

If grounding wires, screws, straps, clips, nuts, or washers used to complete a path to ground are removed for service, they must be returned to their original position and properly fastened.

GE Consumer Home Services Training

Technical Service Guide

Table of Contents

Technical Data ........................................................................................................................ 3

Model Nomenclature .............................................................................................................. 4

Rating Plate ...................................................................................................................... 4

Mini-Manual ....................................................................................................................... 4

Serial Number ...................................................................................................................5

Component Locator Views..................................................................................................... 6

Cabinet .................................................................................................................................... 9

Machine Compartment ..................................................................................................... 9

Door Closure Mechanism................................................................................................ 10

Doors and Hinges ............................................................................................................ 10

Door Gaskets..................................................................................................................... 11

Rollers and Leveling........................................................................................................11

Ice and Water Dispenser ...................................................................................................... 12

Controls ............................................................................................................................ 12

Water Valve and Water Tank ......................................................................................... 13

Airflow ................................................................................................................................... 14

Damper ............................................................................................................................ 14

Evaporator Fan ................................................................................................................ 15

Condenser Fan ................................................................................................................ 1 9

Defrost System ...................................................................................................................... 20

Adaptive Defrost .............................................................................................................. 20

Normal Operating Characteristics.................................................................................. 21

Abnormal Operating Characteristics ............................................................................. 21

Liner Protection Mode .................................................................................................... 21

Defrost Heater..................................................................................................................22

Evaporator Thermistor .................................................................................................... 23

Defrost Overtemperature Thermodisk ........................................................................... 23

Control System ...................................................................................................................... 24

Touch Panel and Temperature Control Board.............................................................. 24

Main Control Board ......................................................................................................... 25

Main Control Board Locator T ables............................................................................... 2 6

Thermistors ...................................................................................................................... 31

Climate Control Drawer........................................................................................................ 32

Strip Circuit...................................................................................................................... 32

Component Locator View............................................................................................... 33

Operation ......................................................................................................................... 34

Temperature Table .......................................................................................................... 35

Climate Control Drawer Top Panel (Mullion) ................................................................ 36

Control Board and Display ............................................................................................ 36

Fan and Fan Housing...................................................................................................... 38

Dampers ........................................................................................................................... 39

Heater............................................................................................................................... 40

Thermistor........................................................................................................................ 40

Airflow.............................................................................................................................. 42

– 1 –

Table of Contents (cont.)

Compartment Lights ............................................................................................................. 44

FF/FZ Compartment Lights Diagnostic .......................................................................... 44

Door Switches ................................................................................................................. 45

Master Light Switch (Sabbath Switch) .......................................................................... 45

Temperature Overload Device (TOD)............................................................................. 45

Circuit Breakers............................................................................................................... 46

Transformers.................................................................................................................... 46

Light Bulb Replacement................................................................................................. 46

Schematic.............................................................................................................................. 49

Refrigeration System............................................................................................................ 50

Compressor...................................................................................................................... 50

Condenser........................................................................................................................ 50

Condenser Loop .............................................................................................................. 50

Dryer................................................................................................................................. 51

Evaporator ....................................................................................................................... 51

Refrigerant Charge ......................................................................................................... 51

Diagnostic Mode ................................................................................................................... 52

Diagnostic Flowcharts .......................................................................................................... 53

Fresh Food Warm - Freezer Normal.............................................................................. 53

Fresh Food Too Cold - Freezer Normal ......................................................................... 54

Fresh Food Warm - Freezer Warm ................................................................................ 55

Freezer Warm - Fresh Food Normal.............................................................................. 56

Compressor Not Running................................................................................................ 57

Refrigerator Dead - No Sound, No Cooling................................................................... 5 8

Damper Door Does Not Operate..................................................................................... 59

Heavy Frost on Evaporator ............................................................................................. 60

Evaporator Fan Not Running .......................................................................................... 61

Condenser Fan Not Running .......................................................................................... 6 2

Warranty ................................................................................................................................63

– 2 –

Technical Data

WARNING: Disconnect power cord before

servicing. Note: Reconnect all grounding devices. All parts of this appliance capable of conducting

electrical current are grounded. If grounding wires, screws, straps, clips, nuts, or washers used to complete a path to ground are removed for service, they must be returned to their original positions and properly fastened.

Caution: To avoid personal injury when servicing the condensing unit, stand on a ladder which will give enough support to allow removal of the top panel and safely allow access to service the unit.

ELECTRICAL SPECIFICATIONS

Max Defrost Control

W/No Door Openings ............60 hrs @ 35 min

Evap Overtemperature Thermodisc ..............60 °F-45 °F

Light Thermostat .....................................140 °F-90 °F

Electrical Rating: 115 VAC 60 Hz.....................9.0 amp

Maximum Current Leakage............................ 0.50 mA

Maximum Ground Path Resistance ............ 0.14 ohms

Energy Consumption (HUMID) ................................. *

Important Safety Notice:

This information is intended for use by individuals possessing adequate backgrounds of electrical, electronic, and mechanical experience. Any attempt to repair a major appliance may result in personal injury and property damage. The manufacturer or seller cannot be responsible for the interpretation of this information, nor can it assume any liability in connection with its use.

REFRIGERATION SYSTEM

Compressor ...............................................983 Btu/hr

Minimum Compressor Capacity

Vacuum .......................................... 26 inches

Minimum Equalized Pressure

@ 70 °F............................................ 72 PSIG

@ 90 °F.............................................88 PSIG

Refrigerant Charge (R134a) .............................14.50 oz

Evaporator

Condenser

Dryer

Heat Exchanger

Suction Tube

NO LOAD PERFORMANCE

CONTROL POSITION 37-0 °F and AMBIENT TEMPERATURE OF

70 °F 90 °F

Fresh Food, °F ....................... 36–46 .............. 37–48

Frozen Food, °F ..................... (-6)–6 .............. (-4)–3

Percent Running Time............. 41–46 .............. 53–55

REFRIGERA TION DIAGNOSIS

To access the low-pressure side of the system, install a WR86X0097 valve only on the process tube extending from the compressor case.

HMI Temperature Control..........................................**

To Cabinet

Wiring

White

Orange

Black

Run

Run Capacitor

Capacitor

For Models ZIS 36 & ZIS 36D: 51.2 kWh/mo. Models ZIS 42 & ZIS 42D:

54.6 kWh/mo. Model ZIS 48: 58.1 kWh/mo. Model ZIS 48D: 59.2 kWh/mo.

For model ZIS 36: WR55X10166. Model ZIS 36D: WR55X10165. Model ZIS 42: WR55X10164. Model ZIS 42D: WR55X10163. Model ZIS 48: WR55X10162. Model ZIS 48D: WR55X10158.

Overload

Green

(Ground)

Relay ....................................................WR07X10031

Overload ............................................... WR08X10015

Run Capacitor (15 uF) ............................. WR62X0080

Overtemperature Thermodisc Light .......... WR50X10035

Overtemperature Thermodisc Evaporator .. WR50X10036

Defrost Heater ....................................... WR51X10065

Drain Trough ASM .................................. WR17X11194

Condenser Fan Motor ............................ WR60X10083

Condenser Fan Blade ............................ WR60X10049

Evaporator Fan Motor ............................ WR60X10043

Evaporator Fan Blade ............................ WR60X10050

Main Board ........................................... WR55X10167

Thermistors (2-FF , 1-FZ, 1-EV) ............... WR55X10025

Damper Assembly Fresh Food ............... WR60X10085

Evaporator ............................................ WR84X10038

Compressor .......................................... WR87X10042

Condenser............................................. WR84X10037

Filter Dryer ............................................. WR86X0096

– 3 –

High Pressure (Do NOT use)

Process Tube

Condenser Loop

REPLACEMENT PARTS

Compressor

Model Nomenclature

Brand/Product

Z - Monogram

Style

I - Built-In

Configuration

S - Side by Side

Color

S - Stainless B - Black W - White Blank - Trim Model

Size

480 - 48 Inches Wide

480

Door T ype

F - Flat R - Right L - Left Door Swing

Engineering

A - Initial Design B - 1st Revision C - 2nd Revision D - 3rd Revision Etc.

Model Year

L - 2002 Pre-Energy M - 2002 Energy

Icemaker/Exterior

N - Nondispenser

Mini-Manual and Rating Plate

Rating Plate

The rating plate, located behind the grille panel at the top of the refrigerator on the right side of the evaporator box, contains the model and serial numbers. Additionally , the rating plate specifies the minimum installation clearances, electrical voltage, frequency, maximum amperage rating, refrigerant charge, and type.

Mini-Manual

The mini-manual is located behind the grille panel at the top of the refrigerator . When done, return the mini-manual to its original location for future use.

– 4 –

Serial Number

The serial number consists of two letters, followed by six numerals. The two prefix letters of the serial number indicate the month and year the product was manufactured. The year of manufacture does not correspond with the model year of the model number.

NAJBEFRAMRPAYAMNUJLUJGUAPESTCOVONCED 0002ZAZDZFZGZHZLZMZRZSZTZVZZ 1002AAADAFAGAHALAMARASATAVAZ 2002DADDDFDGDHDLDMDRDSDTDVDZ 3002FAFDFFFGFHFLFMFRFSFTFVFZ 4002GAGDGFGGGHGLGMGRGSGTGVGZ 5002HAHDHFHGHHHLHMHRHSHTHVHZ 6002LALDLFLGLHLLLMLRLSLTLVLZ 7002MAMDMFMGMHMLMMMRMSMTMVMZ 8002RARDRFRGRHRLRMRRRSRTRVRZ 9002SASDDFSGSHSLSMSRSSSTSVSZ 0102TATDTFTGTHTLTMTRTSTTTVTZ

1102VAVDVFVGVHVLVMVRVSVTVVVZ

2102ZAZDZFZGZHZLZMZRZSZTZVZZ 3102AAADAFAGAHALAMARASATAVAZ 4102DADDDFDGDHDLDMDRDSDTDVDZ 5102FAFDFFFGFHFLFMFRFSFTFVFZ 6102GAGDGFGGGHGLGMGRGSGTGVGZ 7102HAHDHFHGHHHLHMHRHSHTHVHZ 8102LALDLFLGLHLLLMLRLSLTLVLZ 9102MAMDMFMGMHMLMMMRMSMTMVMZ 0202RARDRFRGRHRLRMRRRSRTRVRZ

1202SASDDFSGSHSLSMSRSSSTSVSZ

– 5 –

Component Locator Views

Master Light Switch (Sabbath Switch)

Dryer

Figure 1 - Machine Compartment

Overload & PTCR Relay

Compressor

Condenser Fan

Evaporator

Defrost Heater

Evaporator Thermistor

Evaporator Overtemperature Thermodisc (TOD)

Figure 2 - Evaporator (T op of Freezer)

– 6 –

Water Valve

Evaporator Fan Motor

Capacitor

Figure 3 - Water V alve and Cap acitor

(Center of Machine Compartment)

Evaporator Fan

Connector

Figure 4 - Evaporator Fan

Circuit Breakers

Drawer Under Center of Unit

Transformers

Figure 5 - Light Circuit Transformers

– 7 –

Freezer

Door Switch

Icemaker

Fresh Food

Door Switch

Temperature Touch Pad

Damper

Airflow Grille

Auger Drive

Freezer Thermistor

Water Filter

Cube Solenoid

Fresh Food Thermistors

Lower Fresh Food Lights

Temperature Overload Device (TOD)

Figure 6 - Freezer Compartment

Temperature Overload Device (TOD)

Climate Control Drawer Dampers

Figure 7 - Fresh Food Compartment

– 8 –

Climate Control Drawer Fan

Cabinet

The outer case is made of prepainted galvanized steel. The fresh food and freezer liners are painted metal with a smooth finish. The liners are not removable or replaceable.

Machine Compartment

The machine compartment is located on the top of the unit and has a movable chassis that can be extended from the front of the unit to provide access to the refrigeration system components.

Machine Compartment

Caution: Avoid kinking the refrigeration lines when sliding the chassis out and back in.

To extend the chassis:

1. Remove the grille panel by removing 2 screws from each side (see photo).

2. Remove the wire guard and rocker switch panel.

3. Remove the condenser baffle.

4. Loosen 2 (7/16-in.) track bolts from the front of the chassis track.

5. Remove 2 (7/16-in.) rear track bolts and the spacers under the rear of the chassis track.

6. Pull the chassis forward until it reaches the stops in the tracks, working the refrigeration tubing as you pull the chassis out.

Note.

• When sliding the chassis back into position, be certain the lines and wiring have not fallen behind the chassis.

The Master Light Switch (Sabbath switch) is located behind the grille panel.

2 Screws

Condenser Baffle

• Use the grille screws for adjustment when realigning the grille.

– 9 –

Rear Track Bolt s

Rear T rack Bolts

Front Track Bolt s

Chassis

Door Closure Mechanism

Doors and Hinges

The door closure mechanism uses a spring to provide positive door closure from approximately 60 degrees. The door closure mechanism actuator arm has a spring attached to the rear and is supported by guide rollers on either side of the base channel. The roller circumferences and the actuator arm detents are matched for smooth operation. The arm is attached to the door with an Allen head shoulder bolt.

The closure mechanism allows easy opening to approximately 90 degrees, where the arm has a detent to permit the door to remain open at 90 degrees with minimal tension. Once the door is opened beyond 90 degrees, the closure mechanism pulls the door open until the closure arm engages the door stop at approximately 130 degrees (factory setting, the door stop can be field set to 90 degrees). The reverse action occurs when the door is closed.

Note: The actuator arm is spring loaded with moderate spring tension.

1. Disconnect the spring from the pin and the actuator arm.

2. Remove the 3/16-in. Allen head bolt, bushing, and spacer from the door and actuator arm.

Door

Spring

Hinge

The doors are of one-piece construction with foam insulation.

The inner door panel and outer door panel cannot be separated and must be replaced as an assembly.

Door Adjustment Be sure the top hinge does not hit the cabinet trim.

Adjust the door up or down by turning the threaded hinge pin on the bottom hinge of the fresh food door.

The upper hinge on the freezer door is slotted to allow the freezer door to be adjusted left or right.

Door Removal WARNING: Use the appropriate safety equipment

and lifting techniques. Two persons may be required for door removal.

Caution: Use wood or a heavy plastic sheet to protect the floor where the door will be placed.

1. Remove all food and bins from the inner door liner and tape door to cabinet.

2. Disconnect the spring from the pin and the actuator arm.

3. Remove the Allen head bolt, bushing, and spacer from the door and actuator arm.

4. If removing the freezer door, shut of f the water supply , and disconnect the water line and electrical connector.

3/16"

Bolt

Allen Head

Bolt

GEA01267

5/16"

Actuator

Arm

Roller

Assembly

3. Remove 2 screws and the roller assembly from the rail. Replace roller if excessively worn.

5. Remove the upper hinge.

6. Lift door up and out to remove. Lower Door Hinge Note: If replacing lower door hinge, note the

placement of the door stop (pin).

1. Remove the door . Note: Note the placement of spacers and washers

for reassembly.

2. Remove 3/8-in. hex screws (4) and hinge from the underside of the cabinet.

– 10 –

Hex Nut

Wheel

Leveling Leg

3. Remove T-27 Torx screws (4) and hinge from the bottom of the door .

Hinge

Door Gaskets

The fresh food and freezer doors have magnetic gaskets that create a positive seal to the front of the steel cabinet. The center mullion also has magnets to assist in door sealing. Improper installation of the door gasket will cause same-poled magnets to oppose one another, preventing the door from closing tightly.

The magnetic door gaskets are secured to the doors by a barbed edge that locks into a retainer channel. The side of the gasket that is nearest the handle of the door has a stripe on the inside of the barb (see photo).

Base Channel Spacer

Hinge

Door Stop

Bushing

5/16"

Bolt

GEA01268

Replacement

1. Starting at any corner, pull the old gasket out of the retaining channel.

2. Soak the new gasket in warm water to make it pliable.

3. Push the barbed edge of the gasket into the retainer channel.

Rollers and Leveling

This model has 4-point leveling provided by adjustable rollers on the rear and leveling legs on the front. It also has 2 nonadjustable front rollers that are used only for unit positioning.

T o level the unit:

1. Turn the 7/16-in. hex nut, located above the front rollers, to adjust the roller on the rear of the unit. Turn clockwise to raise, counterclockwise to lower.

2. Turn the front legs with a 1-1/4 wrench to adjust the front of the unit. T urn clockwise to raise, counterclockwise to lower.

in. open end

Stripe

(Handle Side of Door)

– 11 –

Icemaker

Feeler Arm

Power Switch

Green Power Light

Ice and W ater Dispenser

The icemaker is mounted to the upper left wall of the freezer cabinet. Under normal operating conditions, temperatures, door openings, and food load, the icemaker is capable of producing approximately 100 to 130 cubes in a 24-hour period.

To service the icemaker, refer to GE Publication 31-9063.

Controls

The electronic controls on the dispenser are interactive. The control panel is equipped with a proximity sensor that causes the panel to light up as you approach the dispenser (approx. 2 inches).

Removal

1. Remove the bezel from the outside of the freezer door.

Note: On stainless steel models, the front panel must be removed. Remove screws from top, bottom, and hinge side. Pull out on hinge side.

2. Remove the screw from the bottom of the control panel. Lift up and pull the bottom of the panel out. Disconnect the connectors, and remove the control panel.

3. Remove 4 screws and the backing panel.

4. From the back side of the panel, remove the water switch and the light socket.

5. Remove 3 screws and the duct door solenoid.

Screw

4 Screws

Duct Door Solenoid

Light Socket

Water Switch

– 12 –

Water V alve and Water Tank

The water valve is mounted in the left side of the machine compartment.

A plastic water line is routed from under the unit, up the back of the cabinet, into the machine compartment, and to the water filter . A line then goes from the water filter to the water valve.

Two low-pressure plastic water lines supply water to the icemaker and door dispenser from the water valve. A plastic water line is routed from the water valve, out the back of the machine compartment, down the back of the cabinet through the bottom of the unit, and into the fresh food compartment where it is attached to the cold water tank. A line is routed from the cold water tank through the bottom of the unit into the freezer door to supply the water dispenser. The icemaker water line is routed from the water valve through the machine compartment to the icemaker. The icemaker fill tube is also plastic.

To Replace the Water V alve

Water Valve

Screw

Note: Some water may leak from the water supply

line and valve when they are disconnected.

1. Shut off the water supply to the unit.

2. Open the grille panel.

3. Remove 1 Phillips screw attaching the water valve to the filter bracket.

4. Disconnect the wiring harness connector and 3 water lines from the water valve and remove.

To Replace the Chilled Water Tank Note: Some water may leak from the water supply

line and valve when they are disconnected.

1. Shut off the water supply to the unit.

2. Remove 2 screws and the chilled water tank cover inside the fresh food compartment.

3. Remove 2 screws from the chilled water tank.

4. Cut the water lines leaving enough line to reconnect. Use union WR02X10471 (5/16 x 5/16).

Screws

Water Tank Cover

Chilled Water Tank

– 13 –

Airflow

Damper

The fresh food compartment receives chilled air via an electronic damper that is positioned at the top rear of the fresh food compartment. The damper is controlled by the main control board and when open, allows the evaporator fan to push chilled air from the evaporator into the fresh food compartment.

To Remove the Damper

1. Remove the light cover .

Screws

3. Remove the Styrofoam section covering the damper.

4. Disconnect the damper wiring connector.

Damper

2. Remove 4 Phillips screws and the light assembly.

Evaporator

Evap.

Fan

Front FrontBack Back

5. Carefully pull the damper out of the mullion and remove.

Top

Return

Damper

Air Tower

BottomFreezer Side Fresh Food Side

– 14 –

GEA01269

Evaporator Fan

Evaporator Fan Adjustment

The position of the fan blade in relation to the shroud is critical. Refer to evaporator fan adjustment graphic for specifications.

If the fan shorts, it may damage the main control board. If the resistor on the main control board is burnt, you must replace the fan and the board (see photo).

The evaporator fan utilizes a permanent magnet, 4-pole, DC motor that can operate at three different speeds: high, medium, and low (medium and low are the same speed, controlled by the main control board). The speed of the fan is controlled by the voltage output from the main control board. V oltage output from the control board to the fan is 12.6 VDC; however, in order to regulate the speed of the fan, the control board uses Pulse Width Modulation (PWM) during low-

Evaporator and Condenser Fan Resistors

5/16

5/16 +/- .03

+/- 0.03

Evaporator Fan Resistor

Airflow

J2 Connector

GEA01140

Compressor

Defrost Heater

Pin 2

Pin 3

J4 Pin 1

Comm. Tx/Rx

Comm. +12V

Comm. Common

Pin 4

Pin 5

Discrete Disp. Input 1

Discrete Disp. Input 2

Line

Pin 2

Pin 3

Pin 4

Pin 5

J3 Pin 1

Damper - Blue

Pin 6

Damper - White

Damper - Red

Damper - Yellow

FF Encoder Select

FZ Encoder Select

J2 Pin 1

Evaporator Fan Tach.

Monogram Drain Pan Heater

Pin 7

Pin 8

Pin 9

Pin 10

Encoder Signal

Pin 2

Pin 3

Pin 4

Pin 5

Personality Input 5

Fan Common

Evaporator Fan

Condenser Fan

Neutral

NIC

FZ Door Switch

FF Door Switch

J1 Pin 1

FF1 Thermistor

Pin 6

Pin 7

Pin 8

FF Fan

QuickChill Fan

Fan +12V

QuickChill Heater

Auger Motor Interlock

Water Valve

Crusher Solenoid

Auger Motor

Pin 2

Pin 3

Pin 4

Pin 5

FF2 Thermistor

FZ Thermistor

Evaporator Thermistor

+5V

QuickChill Htr.

Pin 1

Pin 6

Pin 7

Pin 8

Pin 9

Personality Input 1

Personality Input 2

Personality Input 3

Personality Input 4

Pin 2

Pin 3

J5 Pin 1

QuickChill Damper1 +

QuickChill Damper1 -

QuickChill Damper2 +

Low Voltage DC

120 VA C

QuickChill Htr.

Pin 2

Pin 4

Pin 5

Pin 6

QuickChill Damper2 -

+5V

QuickChill Thermistor

Condenser Fan Resistor

Pin 1 J8

Pin 1 J9

Pin 1 J11

Pin 9 J7

Pin 8

Pin 7

Pin 6

Pin 5

Pin 4

Pin 3

Pin 2

Pin 1 J12

Pin 1

GEA01196

Bad Evaporator Fan Resistor

– 15 –

speed and medium-speed operation. When operating in low and medium speeds, voltage is sent in pulses (much like a duty cycle) as opposed to an uninterrupted flow. This pulsing of 12.6 VDC produces effective voltage being received at the motor , which is the equivalent to a reduction in voltage. Fan speed will be selected and maintained by the control board regulating the length and frequency of the 12.6 VDC pulse.

One complete revolution of the motor is comprised of all 4 poles. To determine the rpm of the fan: Measure the frequency being applied to the motor . Multiply this number by 15 (60 seconds divided by 4 poles). For example, a frequency measurement of 200 Hz multiplied by 15 would show a fan speed of 3000 rpm (15 x 200 = 3000). Temperature may cause some fan speed variation. Fan speed may vary +/- 5%, depending on the temperature, with higher temperatures causing slightly higher speeds.

The evaporator fan motor uses a 4-wire connection, utilizing a common wire (white), feedback/rpm wire (blue), supply wire (red), and a signal wire (yellow).

12 VDC

8 VDC

4 VDC

0 VDC

12VDC

0 VDC

12 VDC

0 VDC

High S peed (12 VDC measured)

Medium and Low S peed (8 VDC measured)

EVAPORATOR FAN SPEEDS

High Speed (12 VDC measured)

Medium Speed (8 VDC measured)

Low Speed (4 VDC measured)

GEA01139

– 16 –

White Wire (DC Common) The white wire is the DC common wire used for

testing. During repairs, DC polarity must be observed. Reversing the DC polarity will cause a shorted motor and/or board.

Red Wire (Supply) Each motor uses an internal electronic controller

to operate the motor. Supply volt age from the main control board remains at a constant 12 VDC.

Blue Wire (Feedback/RPM) The blue wire feeds rpm (speed) information to

the main control board, allowing the board to maintain consistent fan speeds. Loss of feedback from the blue wire will result in the fan accelerating to maximum speed. Measure the fan rpm using the frequency between the blue and white wires.

High speed - 195 to 200 Hz Medium speed - 145 to 160 Hz

Note: Fan operates at the same speed in low and

medium. Low speed - 145 to 160 Hz (same as medium)

Yellow Wire (Signal) The yellow wire is the input wire from the main

control board. The main control board provides

8.1 VDC effective voltage for low speed, 8.1 VDC effective voltage for medium speed, and 12.6 VDC for high speed. The fan will operate in low speed only when the fresh food thermistor is satisfied.

Compressor

Pin 1 J8

Pin 2

Pin 3

J4 Pin 1

Comm. Tx/Rx

Comm. +12V

Comm. Common

Defrost Heater

Pin 1 J9

Pin 4

Pin 5

Discrete Disp. Input 1

Discrete Disp. Input 2

Line

Pin 1 J11

Pin 2

Pin 3

Pin 4

Pin 5

J3 Pin 1

Damper - Blue

Pin 6

Damper - White

Damper - Red

Damper - Yellow

FF Encoder Select

FZ Encoder Select

J2 Pin 1

Evaporator Fan Tach.

Monogram Drain Pan Heater

Pin 1 J12

Pin 7

Pin 8

Pin 9

Pin 10

Encoder Signal

Pin 2

Pin 3

Pin 4

Pin 5

Personality Input 5

Fan Common

Evaporator Fan

Condenser Fan

Neutral

NIC

FZ Door Switch

FF Door Switch

Pin 9 J7

Pin 8

Pin 7

Pin 6

J1 Pin 1

FF1 Thermistor

Pin 6

Pin 7

Pin 8

FF Fan

QuickChill Fan

Fan +12V

QuickChill Heater

Auger Motor Interlock

Water Valve

Crusher Solenoid

Auger Motor

Pin 5

Pin 4

Pin 3

Pin 2

Pin 1

Pin 2

Pin 3

Pin 4

Pin 5

FF2 Thermistor

FZ Thermistor

Evaporator Thermistor

+5V

QuickChill Htr.

Pin 1

Pin 6

Pin 7

Pin 8

Pin 9

Personality Input 1

Personality Input 2

Personality Input 3

Personality Input 4

Pin 2

Pin 3

J5 Pin 1

QuickChill Damper1 +

QuickChill Damper1 -

QuickChill Damper2 +

Low Voltage DC

120 VA C

QuickChill Htr.

Pin 2

GEA01196

Pin 4

Pin 5

Pin 6

QuickChill Damper2 -

+5V

QuickChill Thermistor

Note: When testing these motors:

• You cannot test with an ohmmeter.

• DC common is not AC common.

• Verify 2 volt age potentials:

a. Red to white - power for internal controller. b. Yellow to white - power for fan.

• Observe circuit polarity.

• Motors can be run for short periods using a

9-volt battery . Connect the white wire to the negative (-) battery terminal only. Connect the red and yellow wires to the positive (+) battery terminal.

– 17 –

To Remove the Evaporator Fan

1. Remove the ice bucket.

2. Disconnect the icemaker connector. Loosen 2 screws and remove icemaker.

3. Remove 4 screws and slide the icemaker drive motor assembly forward. Disconnect the wiring connector and remove the assembly.

4. Remove 2 screws and inner section of left ice bucket track.

Screws

Icemaker Drive Motor Assembly

Screws

5. Remove 2 screws and wiring cover.

6. Remove 6 screws and evaporator fan cover.

Wiring Cover

Evaporator Fan Cover

Screws

– 18 –

7. Disconnect the evaporator fan wiring connector.

8. Remove 2 screws from the fan mounting bracket and remove the fan.

Condenser Fan

The condenser fan utilizes a DC motor that operates at a single speed and is mounted in the machine compartment. When the fan is operating, air is pulled through the condenser , drawing air through the coils. The air is then exhausted past the compressor and out the front of the refrigerator on the right side.

Evaporator Fan

Screws

Wire Connector

Inlet air is available through the left front and left rear of the machine compartment.

If the fan shorts, it will damage the main control board. If the resistor on the main control board is burnt, you must replace the fan and the board (see photo page 15).

The condenser fan is mounted with screws to a fan shroud and mounting bracket in back of the condenser.

To Remove the Fan

1. Extend the chassis (see Machine Compartment in the Cabinet chapter).

2. Pull the blade off the motor shaft.

3. Cut the wire tie securing the fan wiring to the fan bracket.

Caution: Fan connector can be separated into 3 segments (center, left side, and right side). Disconnect the fan connector at the center only.

Fan Bracket

Condenser Fan Motor

Screws

4. Disconnect the fan connector.

5. Feed wiring through the hole in the fan shroud.

6. Remove 2 screws, top section of fan bracket, and motor.

– 19 –

Defrost System

Adaptive Defrost

Adaptive Defrost can be described as a defrost system that adapts to a refrigerator’s surrounding environment and household usage.

Unlike conventional defrost systems that use electromechanical timers with a fixed defrost cycle time, Adaptive Defrost utilizes an intelligent, electronic control to determine when the defrost cycle is necessary. In order to accomplish the correct defrost cycle time, the main control board monitors the following refrigerator operations:

• Length of time the refrigerator doors were open

since the last defrost cycle

• Length of time the compressor has run since the last defrost cycle

• Amount of time the defrost heaters were on in the last defrost cycle

Adaptive Defrost is divided into 4 separate cycles. Those operations are:

• Cooling Operation

• Pre-Chill Operation

• Defrost Heater Operation

• Dwell Period

(See Pub. #31-9062 for more information on Adaptive Defrost.)

Adaptive Defrost (Cooling Operation) During the cooling operation, the main control

board monitors door opening (fresh food door and freezer drawer) and compressor run times. The board counts the time the doors are open. It reduces the length of time between defrosts by 300 seconds (multiplication factor) for each second that each door is open (if both doors are open, it reduces it by twice the amount). The multiplication factor reduces compressor run time. If the doors are not opened, the compressor will run up to 60 hours between defrosts. If the doors

are opened frequently and/or for long periods of time, the compressor run time between defrosts will be reduced to as little as 8 hours.

Adaptive Defrost (Pre-Chill Operation) When the main control board determines that

defrost is necessary, it will force the refrigerator into a continuous cool mode (pre-chill). During prechill, the freezer temperature may be driven below the set point. However, the fresh food temperature will be regulated by the evaporator fan running at low speed. Pre-chill will last for 30 minutes. These models do have an 8-hour defrost holdoff.

Adaptive Defrost (Defrost Heater Operation) After 30 minutes of pre-chill operation, the main

control board turns off the compressor, condenser fan, and evaporator fan.

During defrost operation, the main control board monitors the evaporator temperature using evaporator thermistor inputs. T ypically, the evaporator thermistor will sense a temperature of 38 °F within 16 minutes. When the thermistor senses 38 °F, the main control board will terminate defrost heater operation. Maximum defrost cycle (heater on) time is 35 minutes (main control board time out).

The defrost system is protected by a defrost overtemperature thermodisc (bimetal switch). The thermostat opens when the evaporator temperature raises to 60 °F and closes when the evaporator temperature lowers to 45 °F.

Adaptive Defrost (Dwell Period) After defrost heater operation has been terminated

by the main control board, a 20-minute dwell period occurs. During this period, the compressor, condenser fan, and evaporator fan remain off. The remaining frost melting from the evaporator will continue to drip and drain so that, prior to the cooling operation, the evaporator will be totally clear of any moisture. The pan heater is on for the entire 20 minute dwell period.

– 20 –

+ 50 hidden pages