Ge ZIS480NR, ZIS360NR, ZIS420NR, ZIS 480DR, ZIS 420DR User Manual

GE Consumer & Industrial

TECHNICAL SERVICE GUIDE

Monogram

Inverter Compressor Side-By-Side

Refrigerators

MODEL SERIES:

ZIS360NR
ZIS420NR
ZIS480NR
ZIS_360DR

ZIS_420DR
ZIS_480DR

GEA01265

PUB # 31-9117 04/04

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 & Industrial

Technical Service Guide

Copyright © 2004

All rights reserved. This service guide may not be reproduced in whole or in part
in any form without written permission from the General Electric Company .

– 2 –

Table of Contents

Technical Data ........................................................................................................................ 5

Model Nomenclature .............................................................................................................. 6

Rating Plate ...................................................................................................................... 6

Mini-Manual ....................................................................................................................... 6

Serial Number ...................................................................................................................6

Component Locator Views..................................................................................................... 7

Cabinet .................................................................................................................................. 10

Machine Compartment ................................................................................................... 10

Door Closure Mechanism.................................................................................................11

Doors and Hinges .............................................................................................................11

Door Gaskets.................................................................................................................... 12

Rollers and Leveling....................................................................................................... 12

Ice and Water Dispenser ...................................................................................................... 13

Controls ............................................................................................................................ 13

Water Valve and Water Tank ......................................................................................... 14

Airflow ................................................................................................................................... 15

Damper ............................................................................................................................ 15

Fans ....................................................................................................................................... 16

Evaporator Fan ................................................................................................................ 16

Condenser Fan ................................................................................................................ 20

Defrost System ...................................................................................................................... 21

Adaptive Defrost .............................................................................................................. 21

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

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

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

Defrost Overtemperature Thermodisc ........................................................................... 23

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

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

Thermistors ...................................................................................................................... 25

Main Control Board ......................................................................................................... 26

Main Control Board Locator T ables............................................................................... 27

Thermistors ...................................................................................................................... 32

Climate Control Drawer........................................................................................................ 33

Strip Circuit...................................................................................................................... 33

Component Locator View............................................................................................... 34

Operation ......................................................................................................................... 35

Temperature Table.......................................................................................................... 36

Climate Control Drawer Top Panel (Mullion) ................................................................ 37

Control Board and Display ............................................................................................ 37

Fan and Fan Housing...................................................................................................... 39

Dampers ........................................................................................................................... 40

Heater............................................................................................................................... 41

Thermistor........................................................................................................................ 41

Air Flow............................................................................................................................ 43

– 3 –

Table of Contents (cont.)

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

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

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

Master Light Switch ........................................................................................................ 45

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

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

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

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

Schematics ............................................................................................................................ 49

Refrigeration System............................................................................................................ 55

Inverter Compressor........................................................................................................ 55

Inverter............................................................................................................................. 57

Accumulator .................................................................................................................... 59

System Pressure.............................................................................................................. 59

Refrigerant Charge ......................................................................................................... 59

Drier.................................................................................................................................. 60

Evaporator ....................................................................................................................... 60

Diagnostic Mode ................................................................................................................... 61

Compressor Not Running Flowchart.............................................................................. 62

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

– 4 –

Technical Data

CONDENSER

LOOP

PROCESS

TUBE

COMPRESSOR

*ACCUMULATOR

CONDENSER

HEAT EXCHANGE

EVAPORATOR

HIGH PRESSURE

(DO NOT USE)

*INVERTER

DRYER

CONDENSER FAN

(SEE NOTE)

Note: Fan blade mounted for maximum airflow with 1/2" of shaft exposed.
*Approximate location (Inverter and Accumulator).

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............................ 0.75 mA

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

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

NO LOAD PERFORMANCE

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 ...............................................833 Btu/hr

Minimum Compressor Capacity

Vacuum .......................................... 22 inches

Minimum Equalized Pressure

@ 70 °F...........................................65/65 PSIG

@ 90 °F...........................................79/80 PSIG

Refrigerant Charge (R134a) .............................12.50 oz

CONTROL POSITION 37-0 °F and
AMBIENT TEMPERATURE OF

70 °F 90 °F

Fresh Food, °F ....................... 35–39 .............. 37–48

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

Percent Running Time............. 60 .................... 80

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.

TO CABINET

WIRING

COMMUNICATION

SIGNAL

*

Models ZIS360 - 45.58 kWh/mo. ZIS 360D - 48.67 kWh/mo. ZIS 420 - 47.08

kWh/mo. ZIS 420D - 51.83 kWh/mo. ZIS 480 - 49.33 kWh/mo. ZIS 480D -

56.50 kWh/mo.

**

Models ZIS360 - WR55X10166. ZIS 360D - WR55X10165. ZIS 420 ­WR55X10164. ZIS 420D - WR55X10163. ZIS 480 - WR55X10162. ZIS 480D ­WR55X10158.

RED

WHITE

GREEN/YELLOW

GROUND

ORANGE

INVERTER

BLACK

BROWN
BLUE
BLACK

GREEN/YELLOW

COMPRESSOR

GROUND

REPLACEMENT PARTS

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

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 ........................................... WR55X10400

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

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

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

Compressor .......................................... WR87X10064

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

Filter Drier ............................................. WR86X0096

Inverter ................................................ WR55X10155

Accumulator ......................................... WR02X11264

– 5 –

Model Nomenclature

ZI

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

S

S

480

N

RA

LH

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

R - 2004

Icemaker/Exterior

N - Nondispenser
D - Dispenser

Mini-Manual and
Rating Plate

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.

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.

Serial Number

The first two numbers of the serial number
identify the month and year of manufacture.

Example: AG123456S = Januar y, 2004

A

- JAN 2005 - H
D - FEB 2004 ­F - MAR 2003 - F
G - APR 2002 - D
H - MAY 2001 - A
L - JUN 2000 - Z
M - JUL 1999 - V
R - AUG 1998 - T
S - SEP 1997 - S
T - OCT 1996 - R
V - NOV 1995 - M
Z - DEC 1994 - L

G

The letter designating
the year repeats every
12 years.

Example:

T - 1974
T - 1986
T - 1998

– 6 –

Component Locator Views

Master Light Switch

Inverter

Compressor

Figure 1 - Machine Compartment

Accumulator

Evaporator

Defrost Heater

Evaporator
Thermistor

Evaporator
Overtemperature
Thermodisc (TOD)

Figure 2 - Evaporator (T op of Freezer)

– 7 –

Water Valve

Evaporator Fan Motor

Evaporator Fan

Connector

Figure 3 - Water V alve

(Center of Machine Compartment)

Figure 4 - Evaporator Fan

Circuit Breakers

Housing Under
Center of Unit

Transformers

Figure 5 - Light Circuit Transformers

– 8 –

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

– 9 –

Climate Control
Drawer Fan

Cabinet

The outer case is made of pre-painted 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.

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.

Machine Compartment

The Master Light Switch is located behind the
grille panel.

2 Screws

Inverter

4. Loosen the front 7/16-in. track bolts (1 on each
side of the compressor) from the front of the
chassis track.

5. Remove the rear 7/16-in. track bolts (1 on
each side of the compressor) 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.

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

Track Bolts

Chassis

– 10 –

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

Hinge

Pin

Spring

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.

– 11 –

Hex Nut

Wheel

Leveling Leg

Lower Door Hinge
Note: If replacing lower door hinge, note the

placement of the door stop (pin).

Hinge

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.

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

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. St arting 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)

– 12 –

Ice and W ater Dispenser

Icemaker

Feeler Arm

Power Switch

Green

Power Light

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

I = On

0 = Off

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

– 13 –

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.

Note: No water filter should be installed if home
has in-home water filtration system (reverse
osmosis filter system, etc.) Replace filter with by­pass plug.

Water Valve

Screw

Screw

To Replace the W ater Valve
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.

Screws

Water Tank Cover

Chilled Water Tank

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

– 14 –

Airflow

r

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 .

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

Duct

Entrance

Front FrontBack Back

Duct

Exit

Foam

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

Top

Return

Dampe

Air
Tower

BottomFreezer Side Fresh Food Side

– 15 –

Fans

Evaporator Fan

The position of the fan blade in relation to the shroud is important. Refer to illustration for specifications.

5/16 +/- .03

Airflow

The evaporator fan is the same fan used on previous models; however a significant difference is that the
main control board does not require, nor receive, input from the fan feedback/rpm (blue) wire. The fan
utilizes a permanent magnet, 4-pole, DC motor that operates at three different speeds: high, medium,
and low . 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 13.2 VDC; however to regulate the speed of the fan, the main
control board uses pulse width modulation (PWM). When operating, voltage is sent in pulses (much like
a duty cycle) as opposed to an uninterrupted flow. This pulsing of 13.2 VDC produces ef fective volt age
being received at the motor, which is the equivalent to a reduction in volt age. Fan speed will be selected
and maintained by the main control board regulating the length and frequency of the 13.2 VDC pulse.

One complete revolution of the motor is comprised of all 4 poles. To determine the rpm of the fan, do
the following: 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.

12 VDC

12 VDC

0 VDC

High Speed (12 VDC measured)

12 VDC

9.2 VDC

0 VDC

Medium Speed (9.2 VDC measured)

12 VDC

8 VDC

0 VDC

Low Speed (8 VDC measured)

EVAPORATOR FAN SPEEDS

– 16 –

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).

Evaporator Fan Adjustment

Evaporator and Condenser Fan Resistors

Damper - Yellow

Damper - Red

Damper - White

Comm. 2-Way Digital

J2

1

EARTH

J4 or J16

Comm. Common

Comm. +12V

Damper - Blue

5

1

J3 or J10

1

J15

Inverter Output

Inverter Common

1

J2 or J13

Fan Common

Condenser Fan

Evaporator Fan

Evaporator Fan Tach.

1

J6

2

FF2 Thermistor

FF1 Thermistor

1

10

J1 or J14

J5

1

8

Fan +12V

Custom Cool Fan

Custom Cool Damper1 +

J19

Evaporator Thermistor

FZ Thermistor

Custom Cool Damper1 -

+5V

9

6

+5V

Custom Cool Thermistor

5/16 +/- .03

Airflow

Condenser Fan Resistor

Evaporator Fan Resistor

EARTH

K7

K4

DEFROST

Defrost Heater

Line (L1)

Not Used

J8

J9

J11

J1

J7

Neutral

K5

J12

J18

Not Used

FF Door Switch

FZ Door Switch

Custom Cool Heater

Auger Motor Interlock

CUSTOM COOL

Drain Pan Heater

Water Valve

Some of the low voltage DC

PAN

HEATER

K3

WATER

K2

CRUSHER

K1

AUGER

1

Auger Motor

Crusher Solenoid

J4 or J16

J3 or J10

J1 or J14

connector labeling on this model
may differ from other models. The

J2 OR J13

function and diagnostics for these
connectors are identical for all
models.

– 17 –

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.

Comm. 2-Way Digital

J2

1

EARTH

J4 or J16

Comm. Common

Comm. +12V

5

J15

Damper - Red

Damper - White

Damper - Blue

1

J3 or J10

1

J2 or J13

Inverter Output

Inverter Common

Damper - Yellow

10

1

Fan Common

Condenser Fan

Evaporator Fan

Custom Cool Fan

Evaporator Fan Tach.

FZ Thermistor

FF2 Thermistor

FF1 Thermistor

1

J1 or J14

J5

1

8

Fan +12V

Custom Cool Damper1 +

Custom Cool Damper1 -

+5V

Evaporator Thermistor

9

6

+5V

Custom Cool Thermistor

High speed - 205 to 215 Hz (3140 RPM)
Medium speed - 155 to 165 Hz (2415 RPM)
Low speed - 140 to 150 Hz (2160 RPM)

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

control board. The main control board provides
8 VDC effective voltage for low speed, 9.2 VDC
effective voltage for medium speed, and 12VDC
for high speed. The fan will operate in low speed
only when the fresh food thermistor is satisfied.

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.

EARTH

J19

1

J6

2

K7

K4

DEFROST

Defrost Heater

Line (L1)

Not Used

J8

J9

J11

J1

J7

Neutral

K5

J12

J18

Not Used

FF Door Switch

FZ Door Switch

Custom Cool Heater

Auger Motor Interlock

CUSTOM COOL

Drain Pan Heater

Water Valve

PAN

HEATER

K3

WATER

K2

CRUSHER

K1

AUGER

1

Auger Motor

Crusher Solenoid

Some of the low voltage DC
connector labeling on this model
may differ from other models. The
function and diagnostics for these
connectors are identical for all
models.

– 18 –

J4 or J16

J3 or J10

J2 OR J13

J1 or J14

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.

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

Screws

– 19 –

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 is a permanent-magnet, 4­pole, DC motor that will operate at 3 speeds. Fan
speed (low, medium, high) corresponds with
compressor speed to minimize pressure
variations in the sealed system. 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 13.2 VDC; however to
regulate the speed of the fan, the main control
board uses pulse width modulation (PWM). When
operating, voltage is sent in pulses (much like a
duty cycle) as opposed to an uninterrupted flow.
This pulsing of 13.2 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 main control
board regulating the length and frequency of the

13.2 VDC pulse. .

Evaporator Fan

Screws

Wire Connector

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.

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.

– 20 –

Fan Bracket

Fan Bracket

Condenser Fan Motor

Screws

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

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 hold-off.

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
45 °F within 16 minutes. When the thermistor
senses 45 °F, the main control board will terminate
defrost heater operation. Maximum defrost cycle
(heater on) time is 35 minutes (main control board
time out).

• 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.

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.

Normal Operating Characteristics

• The fill tube heater is on when the defrost
heaters are on.

• Pan heaters are on when the defrost heaters
are on and during dwell period (25 minutes
plus defrost time).

– 21 –

Defrost Heater

Caution: Use care to avoid scratching the finish

on unit walls.
The defrost heater is a single calrod-type, radiant

heater mounted on the evaporator .
To remove the defrost heater:

1. Remove the evaporator fan (see Evaporator
Fan procedure in the Airflow chapter).

2. Remove 8 screws and freezer ceiling panel.

3. Remove Styrofoam insulation from the bottom
of the evaporator drain pan.

4. Loosen evaporator drain hose clamp.

5. Lower left side of evaporator drain pan and
slide right side out of drain hose and remove.

6. Disconnect the heater wiring.

Styrofoam
Insulation

Evaporator Drain Pan

Hose Clamp

7. Remove 2 screws from the left and right heater
fasteners.

8. Slide the heater toward the front of the freezer
compartment and remove.

Heater

Screws

– 22 –

Evaporator Thermistor

The evaporator thermistor is mounted on the
upper left side of the evaporator. The defrost
cycle will terminate when the main control board
detects 45 °F from the evaporator thermistor. The
main control board must sense 45 °F in less than
35 minutes, or the defrost cycle will time out.
Average time to defrost is less than 16 minutes.
Defrost time should not exceed 35 minutes.
Defrost time does not include dwell period.

Defrost Overtemperature Thermodisc

The defrost overtemperature thermodisc (bimetal
switch) is mounted on the evaporator and
provides overtemperature protection during
defrost. This thermostat will open at 60 °F and
will close at 45 °F.

Evaporator
Thermistor

Note: The main control board will not know if the

heater does not come on due to a broken heater,
open defrost overtemperature thermodisc, or
open wiring harness. The defrost heater is
controlled by maximum time on the main control
board or temperature at the evaporator thermistor.

Defrost
Overtemperature
Thermodisc

– 23 –

Control System

Touch Panel and
Temperature Control Board

The temperature control assembly is located at
the top front of the fresh food compartment and
contains the touch panel and temperature control
board.

The temperature control board receives switched
DC voltage from the main control board. Input
consists of pins 2 to 3. Failure of input results in
default to most recent setting. Pin 1 provides
digital communication between the temperature
control board and the main control board. Failure
of communication results in erratic control.

To remove the temperature control assembly:

1. Remove the light cover .

2. Remove 4 Phillips screws and the light
assembly.

Temperature Control Assembly

Light Assembly

Touch Panel

Note: Temperature control assembly is mounted
on 3 slotted fasteners. Fasteners do not need to
be loosened or removed.

3. Cut the RTV around the edge of the
temperature control assembly.

Note: Old RTV must be removed from the inside
of the fresh food compartment and from the
temperature control assembly. RTV 102 must be
put in place when the temperature control panel is
installed.

4. Disconnect the temperature control assembly
wiring connector.

5. Slide the temperature control assembly back
to release it from the slotted fasteners and
lower the assembly.

6. Disconnect the wiring connector from the
temperature control board.

7. Slide the touch panel out of the temperature
control assembly.

Screws

8. Remove 2 screws and the temperature control
board.

– 24 –

Thermistors

This main control board uses input from 4 thermistors. These thermistors are located in the fresh food
section, the freezer section, and on the evaporator. The main control board monitors the thermistors to
determine the temperature in these areas of the unit and determines which components to run and
when to run them based on this information.

Thermistors can also be checked using diagnostic mode.

seulaVrotsimrehT

erutarepmeT

)C(seergeD

04-04-k8.661 Ω
03-22-k88 Ω
02-4-k4.84 Ω
01-41k6.72 Ω

023k3.61 Ω

0105k01 Ω
0286k2.6 Ω
0368k4 Ω

04401k6.2 Ω

05221k8.1 Ω
06041k2.1 Ω

erutarepmeT

)F(seergeD

ecnatsiseR

smho-oliKni

Note: The thermistor’s resistance has a negative coefficient. As the temperature increases, the
thermistor’s resistance decreases.

– 25 –

Main Control Board

The main control board, located behind a metal cover at the top of the refrigerator in the machine
compartment, manages the operation of the refrigerator by calculating response from various inputs.

Damper - White

Damper - Red

Damper - Blue

Comm. 2-Way Digital

J2

1

EARTH

J4 or J16

Comm. Common

Comm. +12V

5

1

J3 or J10

Damper - Yellow

10

FF2 Thermistor

FF1 Thermistor

FZ Thermistor

1

J1 or J14

+5V

Evaporator Thermistor

9

J1 or J14

J2 OR J13

J3 or J10

J4 or J16

Some of the low voltage DC

connector labeling on this model

may differ from other models. The

function and diagnostics for these

connectors are identical for all

models.

1

J15

Inverter Output

Inverter Common

1

J2 or J13

Fan Common

Condenser Fan

Evaporator Fan

Evaporator Fan Tach.

1

J6

2

K4

8

Fan +12V

Custom Cool Fan

J19

DEFROST

J5

1

6

+5V

Custom Cool Damper1 +

Custom Cool Damper1 -

K5

CUSTOM COOL

Custom Cool Thermistor

K7

PAN

K3

WATER

J12

HEATER

EARTH

J1

Not Used

J8

– 26 –

Defrost Heater

Line (L1)

J9

J11

J7

Neutral

J18

Not Used

Water Valve

FF Door Switch

FZ Door Switch

Custom Cool Heater

Auger Motor Interlock

Drain Pan Heater

CRUSHER

K1

K2

1

Auger Motor

Crusher Solenoid

AUGER

Main Control Board Locator Tables

ROTCENNOC NIP TUPNI TUPTUO NOITCNUF

Feedback of fresh food thermistor value. Thermistor is NTC, when temperature drops, resistance

J1 or J14 CDV

J1 or J14

1

2

J1 or J14 3

J1 or J14

4

CDV

CDV

CD

V

value increases, causing return voltage reduction. This value is used to cycle fresh food fan
(when used), evaporator fan, compressor, and condensor fan. Feedback is filtered to respond to
8 degrees of change per minute.

Feedback of second fresh food thermistor value (when used). Thermistor is NTC, when
temperature drops, resistance value increased, causing return voltage reduction. This value is
used to cycle fresh food fan (when used), evaporator fan, compressor, and condensor fan.
Feedback is filtered to respond to 8 degrees of change per minute.

Feedback of freezer thermistor value. Thermistor is NTC, when temperature drops, resistance
value increases, causing return voltage reduction. This value is used to cycle evaporator fan,
compressor, and condensor fan, and will not cycle fresh food fan (when used). Feedback is
filtered to respond to 8 degrees of change per minute.

Feedback of evaporator thermistor value. Thermistor is NTC, when temperature drops, resistance
value increases, causing return voltage reduction. This thermistor value is used to cycle the
heater on during defrost when temperature is below defrost value and off when the temperature
is above defrost value. This value is also read during power-up to determine if refrigerator goes
into pulldown mode or cycle continuation. Feedback is unfiltered, responds immediately.

SNOITINIFEDNIPDRAOBLORTNOC

J1 or J14

ROTCENNOC NIP TUPNI TUPTUO NOITCNUF

J2 or J13

J2 or J13

J2 or J13 4

J2 or J13 7

J2 or J13

ROTCENNOC NIP TUPNI TUPTUO NOITCNUF

5

1

3

5J2 or J13

8

zH

Provides 5 VDC for thermistors and personality pins on J1.VDC

.sdeeps

CDV.dnuorgCD

CDV .MWPybdenimretedsiegatlovevitceffE.noitareporotomrofnafrotaropaveottuptuO

CDV

CDV

CDV. e.gatlovtnatsnoc,snafllaotegatlov

.MWP

V-nommocnaF

.MORPEEni

ylppusCDV-21sedivorP

SNOITINIFEDNIPDRAOBLORTNOC

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vevitceffE.noitareporotomrofnaf)llihCkciuQ(llihCsserpxEottuptuO

SNOITINIFEDNIPDRAOBLORTNOC

tesdeeps,MW

ybdenimretedsiegatlo

J3 or J10

J3 or J10

J3 or J10

J3 or J10

1

2

3

4

CDV.rotomreppetsrepmaD

CDV.rotomreppetsrepmaD

CDV.rotomreppetsrepmaD

CDV.rotomreppetsrepma

D

– 27 –

ROTCENNOC NIP TUPNI TUPTUO NOITCNUF

J4 or J16

J4 or J16

J4 or J16

5J1 CDV

5J2 CDV

5J5 CDV. rotsimreht)llihCkciuQ(llihCsserpxErofCDV5sedivorP

5J6CDV

1

2

3

ROTCENNOC NIP TUPNI TUPTUO NOITCNUF

latigiD

SNOITINIFEDNIPDRAOBLORTNOC

noitacinummoC

latigiD

noitacinummoC

CDV.ylppusCDV-21

CDV.nommocC

D

oclatigidyaw-owT

SNOITINIFEDNIPDRAOBLORTNOC

erpxenehwdnuorgCDV-nommoC

deragnisuac,sesaercnieulavecnatsiser

SNOITINIFEDNIPDRAOBLORTNOC

.draobllihCkciuQdna,draobresnepsid,)draob(

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.detcelessi)l

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,sp

orderutarepmetnehw,CTNsirotsimrehT.rotsimreht)llihCkciuQ(llihCsserpxEfokcabdeeF

ROTCENNOC NIP TUPNI TUPTUO NOITCNUF

7J1 CAV. CAV021-rotomreguaehtotegatlov1LdehctiwS

7J2 CAV. CAV021-dionelosrehsurcehtotegatlov1LdehctiwS

7J3 CAV. C

7J4CAV .desolcsiroodrezeerfnehwhctiwsroodrezeerfmorftupni1Lseviece

7J5 CAV .CAV021-retaeh)llihCkciuQ(llihCsserpxEehtotegatlov1LdehctiwS

7J6CAV

7J7CAV

7J9CAV.nilartuenC

R

enil,lortnocnafrotaropaverof

.snoitaluclactsorfedevitpada

,lortnocnafrotaropaverof

a

A

AV021-evlavretawehtotegatlov1LdehctiwS

hctiwsnehwhctiwsrooddoofhserfmorftupni1LsevieceR

whctiwsroodrezeerfmorftupni1LsevieceR

desusitupnisihT.)neporood(sesolc

dna,snoitaluclacmralarood,snoitaluclacedomnoitcetorpr

desusitupnisihT.)neporood(sesolchctiwsneh

rood,snoitaluclactsorfedevitpada,snoitaluclacedomnoitcetorprenil

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.ezigreneottengamroodtcuddnathgilresnepsidrof)desserpedhctiws(noitisop

Some of the low voltage DC
connector labeling on this model
may differ from other models. The
function and diagnostics for these
connectors are identical for all
models.

– 28 –

J4 or J16

J3 or J10

J2 OR J13

J1 or J14

SNOITINIFEDNIPDRAOBLORTNOC

ROTCENNOC NIP TUPNI TUPTUO NOITCNUF

J15

J15

1

2

VDC

Common

12V variable frequency square wave to control compressor speed.

Note: The J15 connector controls compressor speed through voltage AND frequency. When the main
board calls for compressor operation, J15 output between pins 1 and 2 should be approximately 5 VDC
with the harness connected and approximately 12 VDC with the harness disconnected. The voltage will
not change regardless of compressor speed. A change in frequency controls the compressor speed.

SNOITINIFEDNIPDRAOBLORTNOC

ROTCENNOC NIP TUPNI TUPTUO NOITCNUF

9J1 CAV

ROTCENNOC NIP TUPNI TUPTUO NOITCNUF

11J1CAV .slanimret1LdehctiwsroflaitnetoptupniCAV021-stiucricdraoblortnocotegatlov1Ltnatsno

n

C

.evitpadano

lcyctsorfedtxenehtfienimretedotnoitamrofnisihtsesudnadezigrene

SNOITINIFEDNIPDRAOBLORTNOC

sitiucricsihtgnolwohstnuocremitA.CAV021-tiucrictsorfedehtotegatlov1LdehctiwS

roevitpadasie

ROTCENNOC NIP TUPNI TUPTUO NOITCNUF

21J1 CAV. retaehnapniardehtotegatlov1

Some of the low voltage DC

L

J4 or J16

connector labeling on this model
may differ from other models. The
function and diagnostics for these
connectors are identical for all
models.

SNOITINIFEDNIPDRAOBLORTNOC

J3 or J10

J2 OR J13

J1 or J14

– 29 –

Some of the low voltage DC
connector labeling on this model
may differ from other models. The
function and diagnostics for these
connectors are identical for all
models.

J4 or J16

niP roloCeriW tuptuO/tupnI gnidaeRegatloVniP-ot-niP

J3 or J10

J2 OR J13

J1 or J14

11J,9J,8JdraoBlortnoCniaM

)ediSegatloV-hgiH(srotcennoC

9JdeRtuptu

11JnworBtupn

21JkcalBtuptu

O

I

O

– 30 –

AV021=9nip7Jot9J

AV021=9nip7Jot11J

ot21J

AV021=9nip7J

niP roloCeriW tnenopmoC

1deRerutarepmeT

2nworBerutarepmeT

3egnarOerutarepmeT

draoBlortnoCniaM

)ediSCDegatloV-woL(rotcennoC4J

noitanimreT

lortnoc

lortnoc

lortnoc

tuptuO/tupnI gnidaeRegatloVniP-ot-niP

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eewteb

CDV.ylppusCDV-

CDV.nommocCD

,draoblortnocniamn

,)draob(lortnocerutarepmet

dna,draobresnepsid

.draobllihCkciuQ

21

draoBlortnoCniaM

)ediSCDegatloV-woL(rotcennoC3J

niP roloCeriW tnenopmoC

1eulBrotoMreppetSrepmaD=3nip4Jot1nip3J

2etihWrotoMreppetSrepmaD=3nip4Jot2nip3J

3deRrotoMreppetSrepma

4wolleYrotoMreppetSrepmaD=3nip4Jot4nip3J

D=3nip4Jot3nip3J

noitanimreT

/tupnI

tuptuO

rT

gnidaeRegatloVniP-ot-niP

CDV3.2egatloVgnidnatS

CDV0.6=egatloVgnileva

CDV3.2egatloVgnidnatS

CDV0.6=egatloVgnilevarT

CDV3.2egatloVgnidnatS

CDV0.6=egatloVgnilevarT

CDV3.

2egatloVgnidnatS

CDV0.6=egatloVgnilevarT

J2

EARTH

J4 or J16

niP roloCeriW tnenopmoC

1eulBnafrotaropavE

3etihWnommocnaFnommoCCDV21=8nipo

5

1

1

J3 or J10

1

J15

Inverter Output

Inverter Common

1

J2 or J13

Fan Common

Evaporator Fan

Evaporator Fan Tach.

10

J1 or J14

8

Fan +12V

Condenser Fan

Custom Cool Fan

noitanimreT

retemohcat

1

J5

1

+5V

Custom Cool Damper1 +

Custom Cool Damper1 -

draoBlortnoCniaM

/tupnI

tuptuO

tupnICDV3.6=3nipot1nip2J

9

6

Custom Cool Thermistor

K2

)ediSCDegatloV-woL(rotcennoC2J

niP roloCeriW tnenopmoC

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2eulBdoofhserF

noitanimreT

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2rotsimreht

3deRrotsimrehtrezeerFtupnI5.3ot8.2=5nipot3nip1J

4kcalBrotaropavE

5nworBylppusrotsimrehT

eriW

niP

roloC

1wolleY

2yarG

5nworB

6eulB

gnidaeRegatloVniP-ot-niP

t3nip2J

tnenopmoC

noitanimreT

llihCkciuQ

)looCmotsuC(

repmaD

llihCkciuQ

)looCmotsuC(

repmaD

ppuS

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)CDV5(

llihCkciuQ

)looCmotsuC(

rotsimrehT

rotsimreht

)CDV5(egatlov

/tupnI

tuptuO

/tupnI

tuptuO

/tupnI

tuptuO

tuptuOCDV5=3nip2Jot01nip5J

tupnIA/N

J4 or J16

J3 or J10

draoBlortnoCniaM

tupnI5.3ot8.2=5nipot1nip1J

upnI5.3ot8.2=5nipot2nip1J

t

I5.3ot8.2=5nipot4nip1J

tupn

draoBlortnoCniaM

1nip5J

J2 OR J13

/tupnI

tuptuO

tuptuOCDV5=3nip4Jot5nip1J

)ediSCDegatloV-woL(rotcennoC1J

gnidaeRegatloVniP-ot-niP

CDV

CDV

CDV

CDV

)ediSCDegatloV-woL(rotcennoC5J

gnidaeRegatloVniP-ot-niP

)ytiralopgnisrever(CDV21=2nipot

)ytiralopgnisrever(CDV21=1nipot2nip5J

J1 or J14

4wolleYnafrotaropavEtuptuOCDV6.21=3nipot4nip2J

)wol(CDV1.8

5kniPnafresnednoCtuptuOCD

6kcalBnafnapniarDdnuorGdnuorgCDV

7kcalBnafllihCkciuQnommoCCDV21=7

8deRegatlovylppusnaF

)CDV21(

tuptuOCDV21=3nipot8nip2J

V4.31=3nipot5nip2J

)deeps

nipot8nip2J

– 31 –

,).dem(CDV1.8,)hgih(

elgnissinafresnednoc(

Some of the low voltage DC
connector labeling on this model
may differ from other models. The
function and diagnostics for these
connectors are identical for all
models.

Thermistors

This main control board uses input from 4 thermistors. These thermistors are located in the fresh food
section, the freezer section, and on the evaporator. The main control board monitors the thermistors to
determine the temperature in these areas of the unit and determines which components to run and
when to run them based on this information.

seulaVrotsimrehT

erutarepmeT

)C(seergeD

04-04-k8.661 Ω
03-22-k88 Ω
02-4-k4.84 Ω
01-41k6.72 Ω

023k3.61 Ω

0105k01 Ω
0286k2.6 Ω

0368k4 Ω
04401k6.2 Ω
05221k8.1 Ω
06041k2.1 Ω

dooFhserF

lortnoC

gnitteS

erutarepmeT
)F(seergeD

dooFhserF
rotsimrehT

egnaRerutarepmeT

ecnatsiseR

smho-oliKni

trahCtnioPteSerutarepmeT

rezeerF

lortnoC

gnitteS

rotsimrehTrezeerF

egnaRerutarepmeT

muminiMmumixaMmuminiMmumixaM
F°43F°23F°63F°5-F°01-F°0
F°53F°33F°73F°4-F°9-F°1
F°63F°4

3F°83F°3-F°8-F°2
F°73F°53F°93F°2-F°7-F°3
F°83F°63F°04F°1-F°6-F°4
F°93F°73F°14F°0F°5-F°5
F°04F°83F°24F°1F°4-F°6
F°14F°93F°34F°2F°3-F°7

24F°04F°44F°3F°2-F°8

F°
F°34F°14F°54F°4F°1-F°9
F°44F°24F°64F°5F°0F°01
F°54F°34F°74F°6F°1F°11

– 32 –

Climate Control Drawer

The Climate Control Drawer can chill or thaw items
quickly. It can also store items at their optimum
temperatures. This Climate Control Drawer
contains the following components:

• Control Board

• Thermistor

• Dampers (2)

• Fan

• Heater

The main control board controls the dampers, fan,
and heater based on input from the Climate Control
Drawer’s control board and the thermistor.

The Climate Control Drawer compartment is sealed to reduce the effect that the drawer temperature
has on the rest of the refrigerator . When the drawer features are not being used, the temperature inside
the drawer will be the same as the fresh food compartment.

Strip Circuit

DAMPER

DAMPER

1

2

1

2

YELLOW

YELLOW

CONTROL

BOARD

(CONTROL HMI)

WHITE

WHITE

RED

1

BROWN

3

ORANGE

5

THERMISTOR

FAN

WHITE RED

RED

BROWN

ORANGE

BLUE

BROWN

GRAY

YELLOW

BLACK

Some of the low voltage DC
connector labeling on this model
may differ from other models. The
function and diagnostics for these
connectors are identical for all
models.

J4
1 DATA

2 + 12 VDC

3 COM

J5

6

5

2

1

J2

8 +12 VDC

7 FAN

J4 or J16

MAIN

CONTROL

BOARD

HEATER 5

J3 or J10

J2 OR J13

J7

VIOLET ORANGE

HEATER

441 Ohms

J1 or J14

ORANGEORANGE

BROWN

EMI/RF

FILTER

GREEN

BROWN

AC POWER CORD

GEA01264

– 33 –

Component Locator View

Air
Diffuser

Dampers

Fan

(in Fan Housing)

Light

Connector

Thermistor

(in Fan Housing)

Top Panel

(Mullion)

Heater

(in Fan Housing)

Fan Connector

9-Pin

Connector

Heater

Connector

Control Board
(in T op Panel)

Climate Control Drawer compartment shown with top panel moved out

– 34 –

Operation

During all modes of operation, the main control board will cycle the dampers, fan, and heater as
necessary to maintain the desired temperature. Typical operation is as follows:

Select Temp
This feature maintains optimum temperatures for specific items.
The CITRUS setting will maintain a drawer temperature of 43 °F by circulating warmed air or cooled

air as needed. The dampers will close and the heater will turn on if warmed air is required to maintain
43 °F. The dampers will open if cooled air is required.

The PRODUCE setting will maintain a drawer temperature of 35 °F by circulating warmed air or cooled
air as needed. The dampers will close and the heater will turn on if warmed air is required to maintain
34 °F. The dampers will open if cooled air is required.

The MEA T setting will maintain a drawer temperature of 32 °F by circulating warmed air or cooled
air as needed. The dampers will close and the heater will turn on if warmed air is required to maintain
32 °F. The dampers will open if cooled air is required.

The Climate Control drawer display will show the selected temperature for approximately 4 seconds
after a Select Temp mode has been selected. After approximately 4 seconds, the actual temperature of
the drawer will be displayed. Refer to the Temperature Table for drawer temperatures.

Express Chill
This feature cools items by opening the dampers and circulating air from the freezer compartment

throughout the drawer . The fan will be on at all times during Express Chill.
The Climate Control Drawer display will show the number of minutes (or minutes remaining) for the

Express Chill mode selected on the control panel. The display will not show the temperature of the
drawer . Refer to the Temperature Table for drawer temperatures.

Express Thaw
This feature thaws items by circulating warmed air throughout the drawer. Temperature is maintained in

the drawer by cycling a small heater on and off as needed. The dampers will be closed during Express
Thaw . The fan will be on at all times during Express Thaw.

When the Express Thaw cycle is complete, the drawer will automatically adjust to 30 °F.
The Climate Control Drawer display will show the number of hours (or hours remaining) for the Express

Thaw mode selected on the control panel (.5 LBS = 4 HRS, 1.5 LBS = 8 HRS, 3 LBS = 12 HRS). The
display will not show the temperature of the drawer . Refer to the Temperature T able for drawer
temperatures.

– 35 –

Temperature Table

When using the Temperature T able, please note the following:

• FF and FZ compartments should be within 3 °F of the temperature set point when checking drawer
temperature.

• All temperatures listed are as measured by the thermistor and displayed by the Climate Control
Drawer display.

• Actual drawer temperature will be displayed in Select Temp mode only. The Climate Control Drawer
display will show the selected temperature for approximately 4 seconds after a Select Temp mode
has been selected. Af ter approximately 4 seconds, the actual temperature of the drawer will be
displayed.

• The actual-temperature display is based on the temperature that the main control board sees from
the thermistor. The selected-temperature (example: CITRUS – 43 °F) is based on the logic of the
Climate Control Drawer control board. If the actual temperature that is displayed is incorrect, the
thermistor and main control board are suspect. If the temperature associated with the Select Temp
mode is incorrect, the Climate Control Drawer control board is faulty.

WAHTSSERPXE LLIHCSSERPXE PMETTCELES

EDOM PMET EDOM PMET EDOM PMET

.SBL5.F˚64ot24

.SBL5.1F˚64ot24

.SBL3F˚64ot24

1

1

1

.NIM51F˚52

.NIM03F˚02ot51

.NIM54F˚02ot51

2

2

2

SURTICF˚34

ECUDORPF˚53

TAEMF˚23

3

4

5

Note 1 Climate Control Drawer may take up to 1 hour and 45 minutes to achieve temperature with no
load in drawer (except metal tray) and minimal or no door openings. When the Express Thaw cycle is
complete, the drawer will automatically adjust to 30 °F.

Note 2 Temperature should lower to 25 °F or less within 15 minutes with no load in drawer (except
metal tray) and minimal or no door openings. Temperature should lower to a temperature between 15
°F to 20 °F within 30 minutes with no load in drawer (except metal tray) and minimal or no door
openings. If refrigerator is defrosting, temperature in drawer may go below 15 °F.

Note 3 Climate Control Drawer may take up to 1 hour and 45 minutes to achieve temperature with no
load in drawer (except metal tray) and minimal or no door openings.

Note 4 Climate Control Drawer may take up to 1 hour to achieve temperature with no load in drawer
(except metal tray) and minimal or no door openings.

Note 5 Climate Control Drawer may take up to 45 minutes to achieve temperature with no load in
drawer (except metal tray) and minimal or no door openings.

– 36 –

Climate Control Drawer Top Panel
(Mullion)

Removal

Styrofoam Insert

1. Remove 2 storage bins and the glass panel
over Climate Control Drawer.

2. Remove 4 screws from climate control top
and slide back to access wire connectors.

3. Disconnect the connectors and remove the
top panel.

Note: Note that there is a S tyrofoam insert in the
slot at the back, right-hand corner of the top
panel.

Control Board and Display

The control board and display are located in the
Climate Control Drawer top panel (mullion). The
control board and display are part of the mullion
and cannot be replaced separately .

Input from the Climate Control Drawer’s control
board and the thermistor is used by the main
control board to control the dampers, fan, and
heater.

Screws

Top Panel
(Mullion)

Actual drawer temperature will be displayed in
Select Temp mode only. The Climate Control
Drawer display will show the selected temperature
for approximately 4 seconds after a Select Temp
mode has been selected. After approximately 4
seconds, the actual temperature of the drawer will
be displayed.

The actual-temperature display is based on the
temperature that the main control board sees from
the thermistor. The selected temperature
(example: CITRUS – 45 °F, is based on the logic of
the Climate Control Drawer control board. If the
actual temperature that is displayed is incorrect,
the thermistor and main control board are suspect.
If the temperature associated with the Select Temp
mode is incorrect, the Climate Control Drawer
control board is faulty .

.

– 37 –

Caution: When assembling the top panel, use care to prevent pinched wires
Troubleshooting
Use this diagnostic flowchart if the Climate Control Drawer control panel and display are not operating

properly.
If the problem is drawer temperature and the control panel and display appear to be operating normally ,

check the thermistor, damper, fan, and heater first.
If the actual drawer temperature displayed is incorrect, suspect the thermistor and main control board.

Check

communication

using diagnostic

mode.

Communication

pass?

YES

Replace Climate

Control Drawer

control board.

YES

Replace Climate

Control Drawer control

board. If problem is not

corrected, replace the

main control board.

Is a temperature or time

NO

displayed or are any

indicator lights illuminated

on the Climate Control

Drawer control panel?

Display and/or lights

Replace Climate

Control Drawer

control board.

Check for continuity on

data circuit between

J4-1 and Climate Control

Drawer control board

connector terminal 5.

Circuit OK?

Repair circuit.

NO

Disconnect connector J4
from main control board.

No display

or lights

YES

Check for 12 VDC at

main control board

between J4-2 and J4-3.

12 VDC present?

YES

Reconnect connector J4 to

main control board.

Check for 12 VDC at J4-2 at
main control board between

J4-2 and J4-3.

12 VDC present?

YES

Disconnect connector from Climate

Control Drawer control board.

Check for 12 VDC at the Climate

Control Drawer control board

connector between terminals 3 and 5.

12 VDC present?

NO

NO

NO

Replace main
control board.

Replace Climate

Control Drawer

control board.

Open wiring between Climate

Control Drawer control board and

main control board.

Some of the low voltage DC
connector labeling on this model
may differ from other models. The
function and diagnostics for these
connectors are identical for all
models.

– 38 –

J4 or J16

9-Pin Connector

Behind Climate
Control Drawer

ORANGE

J3 or J10

J2 OR J13

J1 or J14

Fan and Fan Housing

The 12 VDC fan is controlled by the main control board. The main control board turns the fan on and off
based on input from the Climate Control Drawer control board and thermistor. The fan should always
come on any time Express Chill or Express Thaw is selected.

Troubleshooting

Turn on Express Chill.

Check for 12 VDC at

main control board

between J2-8 and J2-7.

12 VDC present?

YES

Some of the low voltage DC
connector labeling on this model
may differ from other models. The
function and diagnostics for these
connectors are identical for all
models.

NO

Check communication

using diagnostic mode.

Communication pass?

YES

Replace main
control board.

J4 or J16

NO

J3 or J10

J2 OR J13

J1 or J14

Check for 12 VDC

at fan connector.

12 VDC present?

YES

· Open circuit between

fan connector and fan.

· Faulty fan.

NO

Open circuit

between main

control board and

fan connector.

Removal

1. Remove Climate Control Drawer top panel.

2. Loosen 2 bottom screws, remove 2 top
screws, and remove air diffuser from fan
housing.

· Open circuit between J4-1 and

Climate Control Drawer control
board terminal 1.

· Faulty Climate Control drawer

control board.

· Faulty main control board.

Screws (Remove)

Screws (Loosen)

Flat Surface

Air
Diffuser

– 39 –

T abs

3. This step for fan removal only: Remove screen
from front of fan and fan from housing.

4. Remove 2 screws and the sheet metal cover
from the right-hand side of the housing.

5. Disconnect fan connector.

9-Pin
Connector

Fan Connector

6. This step for fan removal only: Cut fan wires at

Screen and Fan

fan to remove.

Note: When installing a new fan, the fan wires do not

Fan Housing

Heater Connector

have to be installed under plastic wire holders.

7. Disconnect heater connector and 9-pin connector.

8. Remove 5 screws and fan housing from fresh food compartment.

Note: When installing the diffuser onto the fan housing, the tabs must be on the bottom and the flat
surface must be on top. Incorrect installation will prevent the drawer from cooling and warming properly.

Dampers

Caution: Do not manually move damper door. Manually moving damper door will damage damper.

The dampers are located between the fan housing and the center mullion. The fan housing must be
removed from the fresh food compartment to replace the dampers.

Both dampers always operate at the same time. The
upper damper can be viewed from the Climate Control
Drawer compartment. The lower damper can be viewed
from the freezer compartment. Dampers will be closed
during Express Thaw and will be open during Express
Chill.

The main control board opens and closes the damper
based on input from the Climate Control Drawer control
board and the thermistor.

After selecting Express Thaw, 12 VDC are output from
the main control board for approximately 4 seconds to
close the damper. This voltage can be measured at the
following points:

• Main control board J5-2 to J5-1 with positive (red) test

meter lead on J5-2.

• 9-pin connector behind Climate Control Drawer.

Check from gray wire to yellow wire with positive
(red) test meter lead on gray wire.

After selecting Express Chill, 12 VDC are output
from the main control board for approximately 4
seconds to open the damper. This voltage can be
measured at the following points:

• Main control board J5-1 to J5-2 with positive (red)

test meter lead on J5-1.

• 9-pin connector behind Climate Control Drawer.

Check from yellow wire to gray wire with positive
(red) test meter lead on yellow wire.

Fan Housing

9-Pin Connector

Dampers

– 40 –

Heater

The 120 VAC heater is located in the fan housing. The
fan housing must be removed from the fresh food
compartment to access the heater.

The heater is controlled by the main control board. The
main control board turns the heater on and off based on
input from the Climate Control Drawer control board and
the thermistor.

Heater

EMI/RF

Filter

Heater Connector Behind

Climate Control Drawer

Some of the low voltage DC
connector labeling on this model
may differ from other models. The
function and diagnostics for these
connectors are identical for all
models.

Brown

Orange

Heater

438 Ω

J4 or J16

J3 or J10

J2 OR J13

AC Power
Cord

Fan Housing

J1 or J14

Heater Connector

Heater resistance should be 438 W and can be checked at 2 places:

• J7-5 to J7-9 at main control board. Connector J7 should be disconnected from main control board

when checking resistance.

• Heater (2-pin) connector located behind the Climate Control Drawer. Connector should be

disconnected when checking resistance.
The heater can usually be turned on by entering any of the Quick Thaw modes.
120 VAC output to the heater can be checked at 2 places:

• J7-5 to J7-9 at main control board.

• Heater (2-pin) connector located behind the Climate Control Drawer.

Thermistor

The thermistor is clipped to the inside of the fan housing.
The main control board controls the dampers, fan, and heater based on input from the Climate Control

Drawer’s control board and the thermistor.
Actual drawer temperature will be displayed in Select Temp mode only. The Climate Control Drawer
display will show the selected temperature for approximately 4 seconds after a Select Temp mode has
been selected. After approximately 4 seconds, the actual temperature of the drawer will be displayed.
The actual-temperature display is based on the temperature that the main control board sees from the
thermistor. The selected temperature (example: CITRUS – 43 °F) is based on the logic of the Climate
Control Drawer control board. If the actual temperature that is displayed is incorrect, the thermistor and
main control board are suspect. If the temperature associated with the Select Temp mode is incorrect,
the Climate Control Drawer control board is faulty .
All thermistors can be checked using Diagnostic Mode.

– 41 –

Access
After removing the diffuser, the thermistor can be

accessed through the hole on the right-hand side of
the fan. After removing the thermistor from the clip
(on the inside of the fan housing), the thermistor
can be removed from the fan housing through the
hole in the top of the housing.

Note: When installing the diffuser onto the fan
housing, the tabs must be on the bottom and the
flat surface must be on top. Incorrect installation
will prevent the drawer from cooling and warming
properly.

Note: All thermistors can be checked using
Diagnostic Mode.

Thermistor shown
remov ed from clip.

Clip

9-Pin
Connector

Fan
Housing

Refer to the Thermistor Values chart for resistance
values. Thermistor resistance can be checked at 2

Tabs (Down)

places:

• J5-5 to J5-6 at main control board. Connector J5 should be disconnected from main control board

when checking resistance.

• 9-pin connector located behind the Climate Control Drawer. Connector should be disconnected

when checking resistance.

5 VDC output to the thermistor can be checked at 2 places:

• J5-5 to J5-6 at main control board.

• 9-pin connector located behind the Climate Control Drawer.

Thermistor

seulaVrotsimrehT

erutarepmeT

)C(seergeD

02-4-k4.84 Ω
01-41k6.72 Ω

023k3.61 Ω

erutarepmeT
)F(seergeD

ecnatsiseR

smho-oliKni

0105k01 Ω

Some of the low voltage DC
connector labeling on this model
may differ from other models. The
function and diagnostics for these
connectors are identical for all
models.

– 42 –

J4 or J16

J3 or J10

J2 OR J13

J1 or J14

Air Flow

DAMPERS OPEN

Shown with top panel and drawer removed.

With the dampers open, cold air moves from the FZ compartment through the lower damper and into
the fan housing. The fan blows the cold air through the diffuser into the drawer. The air returns from the
drawer through the diffuser and into the fan housing. Air also moves over the top of the drawer , into the
Climate Control Drawer compartment (not into the FF compartment), and then out of the compartment
via the top damper.

DAMPERS CLOSED

Shown with top panel and drawer removed.

With the dampers closed, the fan moves air from the fan housing, through the diffuser, to the drawer. Air
returns from the drawer, through the diffuser, to the fan compartment.

– 43 –

Compartment Lights

The new Monogram side-by-side refrigerator uses 12 VAC halogen lights in both the fresh food and
freezer compartments. The fresh food compartment is equipped with two 35-watt bulbs and
five 20-watt bulbs producing a total of 170 watts. The freezer compartment is equipped with two
35-watt bulbs producing a total of 70 watts. Power is supplied to all interior lighting by 2 transformers.
The transformers convert 120 V AC to 12 VAC.

FF/FZ Compartment Lights Diagnostic

Check for 120 VAC at transformer. Measure

votlage at transformer connector between red

wire (FZ) or violet wire (FF) and orange wire.

YES

Measure output voltage

at transformer

YES

Open circuit

between lights and

transformer.

connector between red

and gray wires.

Are 12 VAC measured?

NO

Replace

Transformer.

Are 120 VAC measured?

NO

Check the following:

1. FF or FZ door switch

2. Sabbath switch

3. Circuit breaker (located by the transformers in
tray under the FF compartment)

4. Thermal overload
FZ - located at bottom of FZ Compartment
FF - located at bottom of FF light tower

5. 120 VAC Wiring
FZ - blue wire(s) and red wire(s)
FF - yellow wire(s) and violet wires

6. Neutral wiring (orange)

– 44 –

Door Switches

The fresh food and freezer door switches are located at the top of the fresh food and freezer
compartments.

The fresh food door switch closes when the door is open, providing L1 to the fresh food compartment
light transformer.

The freezer door switch is a dual-pole switch. It provides L1 to the main control board when the freezer
door is closed. When the freezer door is open, the switch provides L1 to the freezer compartment light
transformer.

Master Light Switch

The master light switch is located behind the grille
panel, on the main control board cover . The
switch will open the circuits between the door
switches and the transformers, disabling both
transformers and stopping voltage output to the
interior lights.

Main Control

Master Light Switch

Master Light Switch

Main Control

Board Cover

Board Cover

T emperature Overload Device (T OD)

A temperature overload device is wired in series with both the fresh food and freezer compartment
transformers. If the interior lights should reach excessive temperatures due to a door being open for an
extended period, the corresponding TOD will open the circuit that supplies 120 VAC to the transformer .
The TOD will open at 150 °F and close at 90 °F.

The freezer TOD is located behind a metal cover on the back wall of the freezer compartment, at the
base of the light tower. The fresh food TOD is located on the back wall of the fresh food compartment,
at the base of the light tower .

Temperature Overload

Temperature Overload

Device (TOD)

Device (TOD)

Temperature Overload

Temperature Overload

Device (TOD)

Device (TOD)

Light Tower

Freezer Compartment

Light Tower

Fresh Food Compartment

– 45 –

Type 2

Type 1

Type 2

Type 1

This is a 35 watt, 12 volt,

Type MR11 bulb.

If ordering through

GE Parts and Accessories,

order part WR02X11183.

Type 2

This is a 20 watt, 12 volt,

Type T bulb.

If ordering through

GE Parts and Accessories,

order part WR02X11184.

Circuit Breakers

Two re-settable, 2-amp circuit breakers are located
on the front of the transformer housing. Should a
circuit breaker trip (open), it will open the
transformer circuit it is associated with (freezer
compartment or fresh food compartment),
disabling that transformer and stopping voltage
output to the interior lights.

Transformers

Power is supplied to all interior lighting by 2
transformers. One transformer is used for each
compartment. The transformers supply low­voltage power to the lights by converting 120 V AC
into 12 V AC.

The transformers are located in a housing under
the center of the refrigerator. The housing is
accessible from the front of the refrigerator. To
access the transformers, remove the
head screws (6) that hold the housing in place.

1

/4-in hex-

Transformers

Circuit Breakers

Note: Nuisance tripping of the circuit breakers

can occur due to higher than normal line
voltage. Replacing the 2-amp circuit breakers
with a new part (now rated at 3-amps) will
resolve the problem.

Light Bulb Replacement

WARNING: Halogen lights generate intense heat.

Be certain power is off and lamps have sufficient
time to cool before attempting to replace.

Note: The Styrofoam protector in the light lens is
for shipping and must be removed prior to
installation.

Power to the lamps can be turned off at the
Sabbath switch, located behind the grille panel at
the top of the refrigerator.

Note: Turning the temperature control to the OFF
position does NOT remove power to the light
circuits.

The refrigerator uses 2 types of halogen bulbs:
Type 1
The columns along the back wall of the fresh food

and freezer compartments are lit up by lamps
located behind the top pan in the fresh food
compartment and the bottom basket in the freezer
compartment. Type 1 bulbs are 35-watt and have a
life expectancy of about 3500 hours.

Type 2
These lamps are located inside the light shield at

the top of the fresh food compartment and on top
of the Climate Control drawer at the bottom of the
fresh food compartment. Type 2 bulbs are 20-watt
and have a life expectancy of about 2000 hours.

– 46 –

Upper light
shield

Screws

Screws

Slots

Light housing

Support tabs

Light Shield

Type 1 Bulb Replacement
WARNING: Halogen lights generate intense heat.

Be certain power is off and lamps have sufficient
time to cool before attempting to replace.

1. Set the master light switch to the OFF position

and allow the lamps to cool.

2. To access the lamps in the fresh food

compartment, remove the top pan.

3. Grasp each end of the curved light shield and

pull the shield toward you to remove.

4. Remove the glass above the bulbs by pulling it

straight out.
Note: Always follow bulb manufacturer’s directions

for handling and replacing bulbs.

5. Remove the bulb by holding the base and

pulling straight up. Replace with a new bulb.

6. Replace the glass by sliding it into place. Then,

replace the light shield by resting the top lip of

the shield on top of the light housing. Then,

press the sides until the tabs pop into the slots

in the housing.
WARNING: The light shield must be replaced, or

the heat from the bulb could damage the
refrigerator.

Type 2 Bulb Replacement
WARNING: Halogen lights generate intense heat.

Be certain power is off and lamps have sufficient
time to cool before attempting to replace.

1. Set the master light switch to the OFF position

and allow the lamps to cool.

2. If a water filter cartridge is installed, remove it

and replace with a filter bypass plug.

3. Holding the light shield with one hand, rotate the

support tabs until they clear the front of the light

shield. Then, push back on the light shield,

lower the shield at the front, and take out.

4. Remove the 4 screws securing the light

housing to the ceiling. There are two screws at

the front and two at the back.

5. Lower the light housing at the front, then pull it

toward you so the tabs at the back of the light

housing come out of the slots on the back wall.

The lamp assemblies will release from the

holders.

– 47 –

Lower lamp
assemblies

6. Turn the lamp protector to access the bulb.
Note: Always follow bulb manufacturer’s directions for

handling and replacing bulbs.

7. Remove the bulb by holding the base and pulling
straight out. Replace with a new bulb and replace the
lamp protector.

WARNING: Lamp protectors must be replaced, or the
heat from the bulb could damage the refrigerator.

8. Holding up the light housing, place each lamp
assembly in its holder. Feed the attached wires
through the slots and tuck the wires outside the side
of the light housing.

9. Insert the tabs on the back of the light housing in the
slots on the back wall. Raise the light housing into
position and secure with the four screws.

10. Replace the light shield and rotate the support tabs
back out to support the front of the shield.

11. Remove the filter byp ass plug and replace with the
water filter cartridge. Reset the Sabbath switch to the
ON position.

Climate Control Drawer Type 2 Bulb Replacement
WARNING: Halogen lights generate intense heat. Be

certain power is off and lamps have sufficient time to

cool before attempting to replace.

1. Set the master light switch to the OFF position and

allow the lamps to cool.

2. To access the lamps, remove the second produce
pan.

3. The lamps at the back, which face up, can be lifted
out. To access the lamp that shines into the Climate
Control drawer, twist the holder until the arrow point s
toward the back of the refrigerator , then lift up.

4. Turn the lamp protector to access the bulb.

Note: Always follow bulb manufacturer’s directions for

handling and replacing bulbs.

5. Remove the bulb by holding the base and pulling
straight out. Replace with a new bulb and replace the
lamp protector.

WARNING: Lamp protectors must be replaced, or the
heat from the bulb could damage the refrigerator.

– 48 –

J4 OR J16 J3 OR J10 J1 OR J14

J2 OR J13

FF TEMP

CONTROL HMI

1

RED

35

BROWN

ORANGE

RED

BROWN

ORANGE

RED

3

2

1

BROWN

ORANGE

HMI

TEST

JACK

13 5

QUICK CHILL

CONTROL HMI

RED

BLUE

WHITE

RED

REDREDWHITE

WHITE

WHITEWHITE

WHITE

PINK

YELLOW

BLUE

BLACK

YELLOW

BROWN

BROWN

BROWNBROWN

BLACKWHITE

WHITE

WHITE

YELLOW

YELLOW

WHITE

WHITE

WHITE

WHITE

FF2

FZ

EVAP

QUICK CHILL

THERMISTORS

FF1

RED

BLUE

BLUE

BLUE

BROWN

BROWN

ORANGE

DAMPER

MOTHERBOARD

J4

J7

J3

J1

J5

J2

1 DATA

DEF HTR J9

PAN HEATER J12

LINE J11

1

8 MODEL ID 42"

9 MODEL ID 48"

5 +5VDC

1 FF1

2 FF2

3 FZ

4 EVAP

2

3

4

6

5

2

1

2 +12V

3 COM

DAMPER

DAMPER

1

2

1

2

8 12VDC

3 FAN COM

5 COND FAN

4 EVAP RPM

1 EVAP RPM

7 QUICK CHILL FAN

QUICK

CHILL

FAN

EVAP

FAN

COND

FAN

EMI/RF

FILTER

RED

WHITE

ICEMAKER

WATER VALVE

DISPENSER

WATER VALVE

WHITE

WHITE

BLUE

BLUE

ORANGE

BROWN

GREEN

PURPLE

BLACK

AUGER

ORANGE

ORANGE

RED

RED ORANGE

ORANGE

ORANGE

ORANGE

ORANGE

ORANGE

GRAY

GRAY

FF LIGHTS

2 X 20W (40W)

3 X 20W (60W)

2 X 35W (70W)

FF COLUMN

LIGHTS

QC LIGHTS

GRAY

RED

RED

GRAYRED

GRAY

GRAY

RED

RED

REDRED

VIOLET VIOLET

BLUE

BLUE

FF DOOR

SWITCH

T2

T1

TOD

TOD

F1

F1

LIGHT SWITCH

ORANGE

ORANGE

ORANGE

ORANGE

ORANGE

GREEN

BROWN

QUICK CHILL HEATER

AC POWER CORD

VIOLET

BROWN

ORANGE

BROWN

TEST JACK

ORANGE

BLACK

BROWN

BROWN

BROWN

FZ DOOR

SWITCH

RED

PURPLE

BLACK

BLUE

BLUE

YELLOW

YELLOW YELLOW

ORANGE

VIOLET

EVAP THERMODISK

(TOD)

FILL TUBE

HEATER

DEF HEATER

PAN HEATER

ICEMAKER

4

2

1

3

FZ DOOR OPEN 7

FF DOOR OPEN 6

NEUTRAL 9

QC HEATER 5

39Ω

2Ω

CUBE

FZ COLUMN

LIGHTS

2 X 35W (70W)

J15

1

2

BROWN

COMPRESSOR

INVERTER

BLUE

RED

WHITE

BLACK

10Ω

10Ω

10Ω

R=441Ω

R=330Ω

R=38Ω

R=1323Ω

ZIS360

Schematics

SOME OF THE LOW VOLTAGE

DC CONNECTOR LABELING ON

THIS MODEL MAY DIFFER FROM

OTHER MODELS. THE

FUNCTION AND DIAGNOSTICS

FOR THESE CONNECTORS ARE

IDENTICAL FOR ALL MODELS.

– 49 –

J4 OR J16 J3 OR J10 J1 OR J14

J2 OR J13

FF TEMP

CONTROL HMI

1

RED

35

BROWN

ORANGE

RED

BROWN

ORANGE

RED

3

2

1

BROWN

ORANGE

HMI

TEST

JACK

13 5

QUICK CHILL

CONTROL HMI

RED

BLUE

WHITE

RED

REDREDWHITE

WHITE

WHITEWHITE

WHITE

PINK

YELLOW

BLUE

BLACK

YELLOW

BROWN

BROWN

BROWNBROWN

BLACKWHITE

WHITE

WHITE

YELLOW

YELLOW

WHITE

WHITE

WHITE

WHITE

FF2

FZ

EVAP

QUICK CHILL

THERMISTORS

FF1

RED

BLUE

BLUE

BLUE

BROWN

BROWN

ORANGE

DAMPER

MOTHERBOARD

J4

J7

J3

J1

J5

J2

1 DATA

DEF HTR J9

PAN HEATER J12

LINE J11

1

8 MODEL ID 42"

9 MODEL ID 48"

5 +5VDC

1 FF1

2 FF2

3 FZ

4 EVAP

2

3

4

6

5

2

1

2 +12V

3 COM

DAMPER

DAMPER

1

2

1

2

8 12VDC

3 FAN COM

5 COND FAN

4 EVAP RPM

1 EVAP RPM

7 QUICK CHILL FAN

QUICK

CHILL

FAN

EVAP

FAN

COND

FAN

EMI/RF

FILTER

RED

WHITE

ICEMAKER

WATER VALVE

DISPENSER

WATER VALVE

WHITE

WHITE

BLUE

BLUE

ORANGE

BROWN

GREEN

PURPLE

BLACK

AUGER

ORANGE

ORANGE

RED

RED ORANGE

ORANGE

ORANGE

ORANGE

ORANGE

ORANGE

GRAY

GRAY

FF LIGHTS

2 X 20W (40W)

3 X 20W (60W)

2 X 35W (70W)

FF COLUMN

LIGHTS

QC LIGHTS

GRAY

RED

RED

GRAYRED

GRAY

GRAY

RED

RED

REDRED

VIOLET VIOLET

BLUE

BLUE

FF DOOR

SWITCH

T2

T1

TOD

TOD

F1

F1

LIGHT SWITCH

ORANGE

ORANGE

ORANGE

ORANGE

ORANGE

GREEN

BROWN

QUICK CHILL HEATER

R=441Ω

AC POWER CORD

VIOLET

BROWN

ORANGE

BROWN

TEST JACK

ORANGE

BLACK

BROWN

BROWN

BROWN

FZ DOOR

SWITCH

RED

PURPLE

BLACK

BLUE

BLUE

YELLOW

YELLOW YELLOW

ORANGE

VIOLET

EVAP THERMODISK

(TOD)

FILL TUBE

HEATER

DEF HEATER

R=1323Ω

PAN HEATER

R=330Ω

R=38Ω

ICEMAKER

4

2

1

3

FZ DOOR OPEN 7

FF DOOR OPEN 6

NEUTRAL 9

QC HEATER 5

39Ω

2Ω

CUBE

FZ COLUMN

LIGHTS

2 X 35W (70W)

J15

1

2

BROWN

COMPRESSOR

INVERTER

BLUE

RED

WHITE

BLACK

10Ω

10Ω

10Ω

DISPENSER

CONTROL HMI

1

RED

35

BROWN

ORANGE

ZIS360D

SOME OF THE LOW VOLTAGE

DC CONNECTOR LABELING ON

THIS MODEL MAY DIFFER FROM

OTHER MODELS. THE

FUNCTION AND DIAGNOSTICS

FOR THESE CONNECTORS ARE

IDENTICAL FOR ALL MODELS.

– 50 –

J4 OR J16 J3 OR J10 J1 OR J14

J2 OR J13

SOME OF THE LOW VOLTAGE

DC CONNECTOR LABELING ON

THIS MODEL MAY DIFFER FROM

OTHER MODELS. THE

FUNCTION AND DIAGNOSTICS

FOR THESE CONNECTORS ARE

IDENTICAL FOR ALL MODELS.

FF TEMP

CONTROL HMI

1

RED

35

BROWN

ORANGE

RED

BROWN

ORANGE

RED

3

2

1

BROWN

ORANGE

HMI

TEST

JACK

13 5

QUICK CHILL

CONTROL HMI

RED

BLUE

WHITE

RED

REDREDWHITE

WHITE

WHITEWHITE

WHITE

PINK

YELLOW

BLUE

BLACK

YELLOW

BROWN

BROWN

BROWNBROWN

BLACKWHITE

WHITE

WHITE

YELLOW

YELLOW

WHITE

WHITE

WHITE

WHITE

FF2

FZ

EVAP

QUICK CHILL

THERMISTORS

FF1

RED

BLUE

BLUE

BLUE

BROWN

BROWN

ORANGE

DAMPER

MOTHERBOARD

J4

J7

J3

J1

J5

J2

1 DATA

DEF HTR J9

PAN HEATER J12

LINE J11

1

8 MODEL ID 42"

9 MODEL ID 48"

5 +5VDC

1 FF1

2 FF2

3 FZ

4 EVAP

2

3

4

6

5

2

1

2 +12V

3 COM

DAMPER

DAMPER

1

2

1

2

8 12VDC

3 FAN COM

5 COND FAN

4 EVAP RPM

1 EVAP RPM

7 QUICK CHILL FAN

QUICK

CHILL

FAN

EVAP

FAN

COND

FAN

EMI/RF

FILTER

RED

WHITE

ICEMAKER

WATER VALVE

DISPENSER

WATER VALVE

WHITE

WHITE

BLUE

BLUE

ORANGE

BROWN

GREEN

PURPLE

BLACK

AUGER

ORANGE

ORANGE

RED

RED ORANGE

ORANGE

ORANGE

ORANGE

ORANGE

ORANGE

GRAY

GRAY

FF LIGHTS

2 X 20W (40W)

3 X 20W (60W)

2 X 35W (70W)

FF COLUMN

LIGHTS

QC LIGHTS

GRAY

RED

RED

GRAYRED

GRAY

GRAY

RED

RED

REDRED

VIOLET VIOLET

BLUE

BLUE

FF DOOR

SWITCH

T2

T1

TOD

TOD

F1

F1

LIGHT SWITCH

ORANGE

ORANGE

ORANGE

ORANGE

ORANGE

GREEN

BROWN

QUICK CHILL HEATER

R=441Ω

AC POWER CORD

VIOLET

BROWN

ORANGE

BROWN

TEST JACK

ORANGE

BLACK

BROWN

BROWN

BROWN

FZ DOOR

SWITCH

RED

PURPLE

BLACK

BLUE

BLUE

YELLOW

YELLOW YELLOW

ORANGE

VIOLET

EVAP THERMODISK

(TOD)

FILL TUBE

HEATER

DEF HEATER

R=38Ω

R=1323Ω

PAN HEATER

R=330Ω

ICEMAKER

4

2

1

3

FZ DOOR OPEN 7

FF DOOR OPEN 6

NEUTRAL 9

QC HEATER 5

39Ω

2Ω

CUBE

FZ COLUMN

LIGHTS

2 X 35W (70W)

J15

1

2

BROWN

COMPRESSOR

INVERTER

BLUE

RED

WHITE

BLACK

10Ω

10Ω

10Ω

ZIS420

– 51 –

J4 OR J16 J3 OR J10 J1 OR J14

J2 OR J13

FF TEMP

CONTROL HMI

1

RED

35

BROWN

ORANGE

RED

BROWN

ORANGE

RED

3

2

1

BROWN

ORANGE

HMI

TEST

JACK

13 5

QUICK CHILL

CONTROL HMI

RED

BLUE

WHITE

RED

REDREDWHITE

WHITE

WHITEWHITE

WHITE

PINK

YELLOW

BLUE

BLACK

YELLOW

BROWN

BROWN

BROWNBROWN

BLACKWHITE

WHITE

WHITE

YELLOW

YELLOW

WHITE

WHITE

WHITE

WHITE

FF2

FZ

EVAP

QUICK CHILL

THERMISTORS

FF1

RED

BLUE

BLUE

BLUE

BROWN

BROWN

ORANGE

DAMPER

MOTHERBOARD

J4

J7

J3

J1

J5

J2

1 DATA

DEF HTR J9

PAN HEATER J12

LINE J11

1

8 MODEL ID 42"

9 MODEL ID 48"

5 +5VDC

1 FF1

2 FF2

3 FZ

4 EVAP

2

3

4

6

5

2

1

2 +12V

3 COM

DAMPER

DAMPER

1

2

1

2

8 12VDC

3 FAN COM

5 COND FAN

4 EVAP RPM

1 EVAP RPM

7 QUICK CHILL FAN

QUICK

CHILL

FAN

EVAP

FAN

COND

FAN

EMI/RF

FILTER

RED

WHITE

ICEMAKER

WATER VALVE

DISPENSER

WATER VALVE

WHITE

WHITE

BLUE

BLUE

ORANGE

BROWN

GREEN

PURPLE

BLACK

AUGER

ORANGE

ORANGE

RED

RED ORANGE

ORANGE

ORANGE

ORANGE

ORANGE

ORANGE

GRAY

GRAY

FF LIGHTS

2 X 20W (40W)

3 X 20W (60W)

2 X 35W (70W)

FF COLUMN

LIGHTS

QC LIGHTS

GRAY

RED

RED

GRAYRED

GRAY

GRAY

RED

RED

REDRED

VIOLET VIOLET

BLUE

BLUE

FF DOOR

SWITCH

T2

T1

TOD

TOD

F1

F1

LIGHT SWITCH

ORANGE

ORANGE

ORANGE

ORANGE

ORANGE

GREEN

BROWN

QUICK CHILL HEATER

R=441Ω

AC POWER CORD

VIOLET

BROWN

ORANGE

BROWN

TEST JACK

ORANGE

BLACK

BROWN

BROWN

BROWN

FZ DOOR

SWITCH

RED

PURPLE

BLACK

BLUE

BLUE

YELLOW

YELLOW YELLOW

ORANGE

VIOLET

EVAP THERMODISK

(TOD)

FILL TUBE

HEATER

R=1323Ω

DEF HEATER

R=38Ω

PAN HEATER

R=330Ω

ICEMAKER

4

2

1

3

FZ DOOR OPEN 7

FF DOOR OPEN 6

NEUTRAL 9

QC HEATER 5

39Ω

2Ω

CUBE

FZ COLUMN

LIGHTS

2 X 35W (70W)

J15

1

2

BROWN

COMPRESSOR

INVERTER

BLUE

RED

WHITE

BLACK

10Ω

10Ω

10Ω

DISPENSER

CONTROL HMI

1

RED

35

BROWN

ORANGE

ZIS420D

SOME OF THE LOW VOLTAGE

DC CONNECTOR LABELING ON

THIS MODEL MAY DIFFER FROM

OTHER MODELS. THE

FUNCTION AND DIAGNOSTICS

FOR THESE CONNECTORS ARE

IDENTICAL FOR ALL MODELS.

– 52 –

J4 OR J16 J3 OR J10 J1 OR J14

J2 OR J13

FF TEMP

CONTROL HMI

1

RED

35

BROWN

ORANGE

RED

BROWN

ORANGE

RED

3

2

1

BROWN

ORANGE

HMI

TEST

JACK

13 5

QUICK CHILL

CONTROL HMI

RED

BLUE

WHITE

RED

REDREDWHITE

WHITE

WHITEWHITE

WHITE

PINK

YELLOW

BLUE

BLACK

YELLOW

BROWN

BROWN

BROWNBROWN

BLACKWHITE

WHITE

WHITE

YELLOW

YELLOW

WHITE

WHITE

WHITE

WHITE

FF2

FZ

EVAP

QUICK CHILL

THERMISTORS

FF1

RED

BLUE

BLUE

BLUE

BROWN

BROWN

ORANGE

DAMPER

MOTHERBOARD

J4

J7

J3

J1

J5

J2

1 DATA

DEF HTR J9

PAN HEATER J12

LINE J11

1

8 MODEL ID 42"

9 MODEL ID 48"

5 +5VDC

1 FF1

2 FF2

3 FZ

4 EVAP

2

3

4

6

5

2

1

2 +12V

3 COM

DAMPER

DAMPER

1

2

1

2

8 12VDC

3 FAN COM

5 COND FAN

4 EVAP RPM

1 EVAP RPM

7 QUICK CHILL FAN

QUICK

CHILL

FAN

EVAP

FAN

COND

FAN

EMI/RF

FILTER

RED

WHITE

ICEMAKER

WATER VALVE

DISPENSER

WATER VALVE

WHITE

WHITE

BLUE

BLUE

ORANGE

BROWN

GREEN

PURPLE

BLACK

AUGER

ORANGE

ORANGE

RED

RED ORANGE

ORANGE

ORANGE

ORANGE

ORANGE

ORANGE

GRAY

GRAY

FF LIGHTS

2 X 20W (40W)

3 X 20W (60W)

2 X 35W (70W)

FF COLUMN

LIGHTS

QC LIGHTS

GRAY

RED

RED

GRAYRED

GRAY

GRAY

RED

RED

REDRED

VIOLET VIOLET

BLUE

BLUE

FF DOOR

SWITCH

T2

T1

TOD

TOD

F1

F1

LIGHT SWITCH

ORANGE

ORANGE

ORANGE

ORANGE

ORANGE

GREEN

BROWN

QUICK CHILL HEATER

AC POWER CORD

VIOLET

BROWN

ORANGE

BROWN

TEST JACK

ORANGE

BLACK

BROWN

BROWN

BROWN

FZ DOOR

SWITCH

RED

PURPLE

BLACK

BLUE

BLUE

YELLOW

YELLOW YELLOW

ORANGE

VIOLET

EVAP THERMODISK

(TOD)

FILL TUBE

HEATER

R=1323Ω

DEF HEATER

R=38Ω

PAN HEATER

R=330Ω

ICEMAKER

4

2

1

3

FZ DOOR OPEN 7

FF DOOR OPEN 6

NEUTRAL 9

QC HEATER 5

39Ω

2Ω

CUBE

FZ COLUMN

LIGHTS

2 X 35W (70W)

J15

1

2

BROWN

COMPRESSOR

INVERTER

BLUE

RED

WHITE

BLACK

10Ω

10Ω

10Ω

R=441Ω

ZIS480

SOME OF THE LOW VOLTAGE

DC CONNECTOR LABELING ON

THIS MODEL MAY DIFFER FROM

OTHER MODELS. THE

FUNCTION AND DIAGNOSTICS

FOR THESE CONNECTORS ARE

IDENTICAL FOR ALL MODELS.

– 53 –

J4 OR J16 J3 OR J10 J1 OR J14

J2 OR J13

FF TEMP

CONTROL HMI

1

RED

35

BROWN

ORANGE

RED

BROWN

ORANGE

RED

3

2

1

BROWN

ORANGE

HMI

TEST

JACK

13 5

QUICK CHILL

CONTROL HMI

RED

BLUE

WHITE

RED

REDREDWHITE

WHITE

WHITEWHITE

WHITE

PINK

YELLOW

BLUE

BLACK

YELLOW

BROWN

BROWN

BROWNBROWN

BLACKWHITE

WHITE

WHITE

YELLOW

YELLOW

WHITE

WHITE

WHITE

WHITE

FF2

FZ

EVAP

QUICK CHILL

THERMISTORS

FF1

RED

BLUE

BLUE

BLUE

BROWN

BROWN

ORANGE

DAMPER

MOTHERBOARD

J4

J7

J3

J1

J5

J2

1 D ATA

DEF HTR J9

PAN HEATER J12

LINE J11

1

8 MODEL ID 42"

9 MODEL ID 48"

5 +5VDC

1 FF1

2 FF2

3 FZ

4 EVAP

2

3

4

6

5

2

1

2 +12V

3 COM

DAMPER

DAMPER

1

2

1

2

8 12VDC

3 FAN COM

5 COND FAN

4 EVAP RPM

1 EVAP RPM

7 QUICK CHILL FAN

QUICK

CHILL

FAN

EVAP

FAN

COND

FAN

EMI/RF

FILTER

RED

WHITE

ICEMAKER

WATER VALVE

DISPENSER

WATER VALVE

WHITE

WHITE

BLUE

BLUE

ORANGE

BROWN

GREEN

PURPLE

BLACK

AUGER

ORANGE

ORANGE

RED

RED ORANGE

ORANGE

ORANGE

ORANGE

ORANGE

ORANGE

GRAY

GRAY

FF LIGHTS

2 X 20W (40W)

3 X 20W (60W)

2 X 35W (70W)

FF COLUMN

LIGHTS

QC LIGHTS

GRAY

RED

RED

GRAYRED

GRAY

GRAY

RED

RED

REDRED

VIOLET VIOLET

BLUE

BLUE

FF DOOR

SWITCH

T2

T1

TOD

TOD

F1

F1

LIGHT SWITCH

ORANGE

ORANGE

ORANGE

ORANGE

ORANGE

GREEN

BROWN

QUICK CHILL HEATER

R=441Ω

AC POWER CORD

VIOLET

BROWN

ORANGE

BROWN

TEST JACK

ORANGE

BLACK

BROWN

BROWN

BROWN

FZ DOOR

SWITCH

RED

PURPLE

BLACK

BLUE

BLUE

YELLOW

YELLOW YELLOW

ORANGE

VIOLET

EVAP THERMODISK

(TOD)

FILL TUBE

HEATER

R=1323Ω

DEF HEATER

R=38Ω

PAN HEATER

R=330Ω

ICEMAKER

4

2

1

3

FZ DOOR OPEN 7

FF DOOR OPEN 6

NEUTRAL 9

QC HEATER 5

39Ω

2Ω

CUBE

FZ COLUMN

LIGHTS

2 X 35W (70W)

J15

1

2

BROWN

COMPRESSOR

INVERTER

BLUE

RED

WHITE

BLACK

10Ω

10Ω

10Ω

DISPENSER

CONTROL HMI

1

RED

35

BROWN

ORANGE

ZIS480D

SOME OF THE LOW VOLTAGE

DC CONNECTOR LABELING ON

THIS MODEL MAY DIFFER FROM

OTHER MODELS. THE

FUNCTION AND DIAGNOSTICS

FOR THESE CONNECTORS ARE

IDENTICAL FOR ALL MODELS.

– 54 –

Refrigeration System

Inverter Compressor

The new inverter compressor is not
controlled by 120 V AC output from
the main control board, as in
previous models. The compressor
is controlled by the inverter .

Warning: Disconnecting the 6-pin
connector does not disconnect
power (120 V AC) from the inverter.
The refrigerator must be unplugged
before servicing the inverter or
compressor.

Caution: Do not attempt to
direct-start the compressor.
The compressor operates on a
3-phase power supply . Applying
120 VAC to the compressor will permanently damage the unit. It is not possible to start the
compressor without an inverter.

The compressor is a reciprocating, variable speed, 4-pole type. It operates on 3-phase, 80 to 230 V AC
within a range of 57 to 104 Hz. Compressor speed is controlled by voltage frequency and pulse width
modulation. Increasing frequency from the inverter will produce an increase in compressor speed.

• Frequency of 57 Hz will produce low speed operation at 1710 rpm.

• Frequency of 70 Hz will produce medium speed at 2100 rpm.

• Frequency of 104 Hz will produce 3120 rpm.
Note: Certain voltmeters will not be able to read voltage output or frequency from the inverter.
Compressor wattages at various speeds are:

• LOW - 65 watts

• MED - 100 watts

• HIGH - 150 watts
BTU rating also varies according to operating speed.
Compressor speed is based on the temperature set-point in conjunction with the cabinet temperature.

Speeds are selected according to the following cabinet temperatures:

• 6 °F to 19.5 °F above set-point = high speed

• 3.5 °F to 5.5 °F above set-point = medium speed

• 1 °F to 3 °F above set-point = low speed
Note: The compressor will run at medium speed if the cabinet temperature is 20 °F or more above the

set-point.
The use of 3-phase power eliminates the need for the PTCR relay , cap acitor, and individual start and run
windings; therefore the start, run, and common pins found on conventional compressors are not
applicable on this 3-phase model. Compressor pin functions are identical and compressor lead wire
configuration is of no importance. A resistance of 9 to 11 W should be read between any 2 of the 3 pins.
Should an open occur in the compressor winding or should one of the compressor lead wires become
open or disconnected, the inverter will stop voltage output to the compressor .

– 55 –

High compressor torque enables the compressor to start against high pressure in the sealed system.
When power has been disconnected from an operating unit, the high torque may enable the
compressor to start immediately upon power restoration. The compressor, if unable to start after 12
times, will wait for 8 minutes before trying again.

Compressor and sealed system operation is extremely smooth and cool. The compressor exterior may
be room temperature while operating; therefore a running unit may be difficult to detect.

To verify that the compressor is running:
Disconnect power from the unit and place a hand on the compressor. Reconnect power and feel for a

vibration when the compressor tries to start. It may take up to 8 seconds before the compressor
attempts to start.

To determine motor rpm:
Measure the frequency of the voltage being applied to the compressor and multiply this number by 30.

For example, a frequency measurement of 70 Hz would show a compressor speed of 2100 rpm (30 x
70 = 2100).

Note: If the compressor fails to start, the inverter will briefly stop voltage output. The inverter will make
12 consecutive attempts to start the compressor (once every 12 seconds). If, after 12 attempts, the
compressor has not started, an 8-minute count will occur. After 8 minutes, the inverter will attempt to
start the compressor again. If the compressor starts, normal operation will resume. If the compressor
fails to start, the process will be repeated. Removing power from the unit will reset the inverter count.
When power is restored, the inverter will attempt to start the compressor within 8 seconds.

Note:

• When ordering a replacement compressor, order both the compressor and inverter. Replace the
compressor first. If, after compressor installation, the compressor fails to start, replace the inverter.

• When servicing the compressor, it is important to dress the wiring to keep low voltage DC wiring and
120 V AC wiring separate.

– 56 –

Inverter

Warning: Disconnecting the 6-pin connector does not disconnect power (120 VAC) from the
inverter. The refrigerator must be unplugged before servicing the inverter.

Note: Certain voltmeters will not be able to read voltage output from the inverter . If no voltage or erratic

voltage is measured, it does not necessarily indicate a faulty inverter .
The inverter receives 120 V AC line-in from the power supply. The inverter converts this single-phase,

60 Hz, 120 V AC into 3-phase, 230 VAC, with frequency variations between 57 Hz and 104 Hz. This
voltage is delivered to the compressor through 3 lead wires. Each wire will carry identical voltage and
frequency. When checking inverter voltage output, connect the test-meter leads to any 2 of the 3
compressor lead wires. The same reading should be measured between any 2 of the 3 wires.

Note: The compressor leads must be connected to measure voltage output. If the compressor wires
are not connected, or if an open occurs in one of the 3 lead wires or in the compressor, the inverter will
stop voltage output.

The inverter controls compressor speed by frequency variation and by pulse width modulation (PWM).
Changing frequency and PWM will cause an effective voltage between 80 and 230 VAC to be received at
the compressor.

• Low speed (1710 rpm) - 57 Hz

• Medium speed (2100 rpm) - 70 Hz

• High Speed (3120 rpm) - 104 Hz
The inverter receives commands from the main control board.

The main control board will send a (PWM) run signal between 1.5
and 3.5 VDC effective voltage to the inverter. The signal voltage at
the inverter should be equal to the signal voltage sent by the main
control board. The inverter will select compressor speed (voltage
output) based on this signal. A signal voltage from the main
control board (J15 connector ) lower than
faulty main control board. The main control board will only send a
run signal to the inverter when the compressor should be on.

Note: When measuring signal voltage (from the main control
board) at the inverter, disconnect the wire harness connector at
the inverter and measure the voltage at the connector .

The inverter will monitor compressor operation and if the
compressor fails to start or excessive current draw (4 amps
maximum) is detected, the inverter will briefly stop voltage output.
The inverter will then make 12 consecutive compressor start
attempts (once every 12 seconds). If after 12 attempts the
compressor has not started, an 8-minute count will initiate. After
the 8-minute count, the inverter will attempt to start the
compressor again. If the compressor starts, normal operation will
resume. If the compressor fails to start, this process will be repeated. Removing power to the unit will
reset the inverter count. When power is restored, the inverter will attempt to start the compressor within
8 seconds.

5 VDC indicates a

J15

The inverter has a built-in circuit protection to guard against damage from a failed or shorted
compressor. However, if a failed compressor is diagnosed, order a new compressor and inverter. If the
compressor fails to start after replacement, replace the inverter.

– 57 –

Note: When servicing the inverter , it is
important to dress the wiring to keep low­voltage DC wiring and 120 V AC wiring
separate.

To remove the inverter:

1. Unplug the unit.

2. Open access cover.

3. Remove the screw securing the inverter to
the sheet metal dividing wall. (It may be
necessary for you to move the foam
spacer.)

4. Slide the inverter forward to release the
back from the metal dividing wall.

Note: It may be necessary to bend the
process tube in order to remove the inverter. If
it is necessary to bend the process tube, use
extreme care.

5. Turn the inverter horizontally and slide the
inverter out of the machine compartment.

To remove the inverter cover:

Screw

Inverter

Use a small screwdriver to release the two
small tabs and carefully remove the inverter
cover.

Inverter

Inverter

Line-In (L1)

Line-In (L1)

Signal Wire Connector

Signal Wire Connector

(From Main Control Board)

(From Main Control Board)

Compressor Lead

Compressor Lead

Wires

Wires

Tabs

– 58 –

Accumulator

An accumulator has been installed at the inlet of
the compressor to prevent liquid refrigerant (low
quality) from entering the suction line. Changes in
compressor speed (transition state) can
temporarily reduce refrigerant quality . The
accumulator compensates for this by collecting
and holding up to 2 oz of liquid while allowing
vapor to pass. Within minutes after the
compressor speed change, the system attains a
steady state (becomes stabilized), the liquid
refrigerant in the accumulator vaporizes, and
refrigerant quality returns to normal.

Note: Accumulator should be located above drain
pan to allow any condensed moisture
accumulated to fall into drain pan.

Accumulator

Steady State

INVERTER COMPRESSOR

70-135 PSIG
85-90 PSIG at
75 ˚F Ambient

CONDENSER EVAPORATOR

FILTER-DRIER

COMPRESSOR

CAPILLARY

ACCUMULATOR

MIX OF LIQUID AND VAPOR

HIGH PRESSURE LIQUID

0-5 PSIG
1-2 PSIG at
75 ˚F Ambient

HIGH PRESSURE VAPOR

70-135 PSIG
85-90 PSIG at
75 ˚F Ambient

CONDENSER EVAPORATOR

LOW PRESSURE LIQUID

MIX OF LIQUID AND VAPOR

LOW PRESSURE VAPOR

Transition State

INVERTER COMPRESSOR

COMPRESSOR

FILTER-DRIER

CAPILLARY

ACCUMULATOR

LIQUID ENTERS
THE ACCUMULATOR

0-5 PSIG
1-2 PSIG at
75 ˚F Ambient

GEA01263

System Pressure

The refrigeration system should maintain a consistent pressure regardless of compressor speed.
Pressure variations, due to changing compressor speed, are minimized by matching the condenser fan
speed and evaporator fan speed to the compressor speed. The condenser and evaporator fans will
always operate at the same speed (low, medium, or high) as the compressor.
Low side system pressure should be between 0 and 5 psig dependant on ambient temperature.
System pressures in an ambient temperature of 75 °F should be:

••

• High Side – 85 to 90 psig

••

••

• Low Side – 1 to 2 psig

••

Refrigerant Charge

The refrigerant used in the sealed system is R134a. Proper system charge is 12.5 oz; however, an
additional 0.5 oz is required when adding a filter/drier . Proper system charge is critical to the operation of
this unit.

– 59 –

Drier

The drier is positioned vertically in the center of the
machine compartment. A copper process tube,
connected to the inlet of the drier , provides access
to the high-pressure side of the refrigeration
system. The capillary is connected to the outlet of
the drier .

Evaporator

The evaporator is made of copper and aluminum
and is located above the evaporator fan at the top of
the freezer compartment.

To replace the evaporator

Process
Tube

Drier

1. Recover the refrigerant.

2. Remove the evaporator fan (see procedure).

3. Remove the defrost heater (see procedure).

4. Remove the defrost overtemperature
thermodisc and evaporator thermistor.

5. Disconnect the ground wire from the evaporator
and position all wiring to allow for evaporator
removal.

6. Remove the screws securing the evaporator to
the cabinet.

Caution: Protect wiring from heat during
desoldering and resoldering.

7. Desolder the capillary tube from the evaporator .

8. Desolder the suction line.

9. Remove the evaporator .

10. Using a file, score the capillary tube just above the
old solder and break the solder-covered section
off. This will help prevent the capillary tube from
becoming plugged when resoldering.

Capillary

Evaporator Thermistor

Evaporator Thermistor

Defrost Overtemperature Thermodisc

11. Position the new evaporator in the cabinet.
Insert the suction line and capillary tube into the
evaporator.

12. Solder the suction line to the evaporator using
silfos.

13. Solder the capillary tube to the evaporator using
silfos.

14. Install a replacement drier.

15. Evacuate and recharge the system using
currently accepted procedures.

Refrigerant Charge

The refrigerant used in this model is type R134a.
Refer to the mini-manual or model tag for the
exact refrigerant charge quantity .

– 60 –

Diagnostic Mode

Enter the diagnostic mode by pressing both the freezer temperature pads (plus and minus) and the
refrigerator temperature pads (plus and minus) simultaneously. All 4 pads must be held for
approximately 3 seconds. A blinking “0” in both displays indicate the refrigerator has entered the test
mode.

Enter the appropriate display numbers as
shown below and press any pad other than the
temperature pads to activate that test mode.

rezeerF

yalpsiD

01 .edoMmoorwohS.edommoorwohsnitinU

02

03

04

06

07

08 .rooDtcuDnepO.sesolcnehtsdnoces01rofsneporood

09 .tseTretaeHsseceRresnepsiD

10 .tseTsrepmaD

12 .emiTnuR%001

13 .tseTllihc-erP

14 .tseTtsorfeD.woleb2etoneeS.elcyctsorfedehtselggoT

dooFhserF

yalpsiD

epmet

scitsongaiDstluseRstnemmoC

neewtebkcehcnoitacinummoC

dnalortnocerutarepmet

.draoblortnocniam

neewtebkcehcnoitacinummoC

.resnepsiddnalortnocerutar

dnaresnepsid

.tseTfleS

.tseT

neewtebkcehcnoitacinummoC

.draoblortnocniam

)lortnocerutarepmet(IMH

fleSmetsySrosneSdnalortnoC

tcuD

olcebtsumroodFF

iyalpsidZFno"P"

.KOf

.KOfiyalpsidZFno"P"

.KOfiyalpsidZFno"P"

iddnarotsimrehthcaeskcehC

.liafrof"0"dnassap

.sdnoces

ap,nepolliwrepmadhcaE

.esolc

.ruoh1retfatuo

.nwosti

.dnuofsimelborpsnaemyalpsidZFno"F"

.dnuofsimelborpsnaemyalpsidZFno"F"

.dnuofsimelborpsnaemyalpsidZFno"F"

.et

animullilliwstnemgesciremundnas'DELllA

rof"P"syalps

06rofnoretaehssecerresnepsidehtsnruT

neht,ylfierbesu

semiT.emitehtfo%001nometsysdelaeS

nolamronotsnrutertinU.edomllihc-erpstratS

tsuM

.woleb1etoneeS

rferfideretneebtonnaC

.ffo

irferfideretneebtonnaC

.ffo

otdenepoerdnades

.edommoorwohstrats

desserpsidap"wahTsserpxE"nehW

.ffonrutlliws'DEL"wahTsserpxE"

dess

erpsidap"llihCsserpxE"nehW

.ffonrutlliws'DEL"llihCsserpxE"

ottessirotaregi

ottessirotareg

.ffosretaehnrutotniagasserp

ottessirotaregirferfideretneebtonnaC

.woleb2etoneeS.ffo

15 .teseRlortnoCniaM.tesermetsysasesuaC

16 .edoMcit

17 .F/CeergeD.CotFmorfyalpsiderutarepmetsegnahC

songaiDtixE.teserdraoblortnocerutarepmetasesuaC

Note 1: Display order is: 1) Fresh Food 1, 2) Fresh Food 2, 3) Custom Cool, 4) Evaporator,

5) Freezer. Thermistor test results are P = pass, 0 = fail, S = short to 5 VDC, B = bad amplifier
(replace main control).

Note 2: You must enter the defrost test again to toggle the defrost heater off at the end of the test.
The heater will not come on if the evaporator thermistor or overtemperature thermodisc is warm.

– 61 –

Compressor Not Running Flowchart

Unplug refrigerator. Warm
freezer thermistor to 70 F.

Connect power and set
temperature controls to

maximum settings.

Does compressor start?

YES

Adjust settings and

allow 24 hours to

stabilize.

NO

Check condenser

fan for operation.

Fan operating?

YES

NO

YES

Verify freezer

thermisor is within

proper range using

thermistor values

chart. Is thermsitor

within proper range

NO

Note: A signal voltage from the

main board to the inverter of less

than 5 VDC indicates a bad

main board.

Verify signal voltage of 5 to

12 VDC at the main control

board connector J15.

Is voltage OK?

YES

Disconnect the main control

board signal wire at the inverter

and verify signal voltage of

5 to 12 VDC.

Voltage OK?

YES

Check compressor for

proper resistance.

9 to 11 ohms should be

measured between all

pins.

Resistance OK?

NO

Go to Condenser
Fan Not Running

flowchart.

NO

NO

Replace main
control board.

Replace wiring

harness from main

control board to

inverter.

Replace compressor.

Note: When ordering a replacement

compressor, order the compressor and
inverter. Replace the compressor first.

If the compressor does not start

replace the inverter.

Check wiring

connections. If

wiring is OK, replace

thermsitor.

YES

Replace inverter.

YES

Check for 120 VAC

(L1) at inverter.

Voltage present?

YES

Check compressor

lead wires and

connections.

Wires and

connections OK?

Repair lead wire or

NO

connection.

– 62 –

NO

Repair inverter

wiring.

Warranty

YOUR MONOGRAM REFRIGERATOR WARRANTY
Staple sales slip or cancelled check here. Proof of original purchase
date is needed to obtain service under warranty.

WHAT IS
COVERED

From the Date
of the Original
Purchase

FULL TWO-YEAR WARRANTY

For two years from date of original purchase, we will provide, free of charge, parts and service labor in
your home to repair or replace any part of the refrigerator that fails because of a manufacturing defect.

FULL FIVE-YEAR WARRANTY

For five years from date of original purchase, we will provide, free of charge, parts and service labor
in your home to repair or replace any part of the sealed refrigerating system (the compressor, condenser,
evaporator and all connecting tubing) that fails because of a manufacturing defect.

LIMITED ADDITIONAL SEVEN-YEAR WARRANTY ON THE SEALED SYSTEM

For the sixth through twelfth year from the date of the original purchase, we will provide, free of
charge, replacement parts for any part of the sealed refrigerating system (the compressor, condenser,
evaporator and all connecting tubing) that fails because of a manufacturing defect. You pay for
the service trip to your home and for service labor charges.

LIMITED LIFETIME WARRANTY ON ACCURIDE® SLIDES

From the date of the original purchase we will provide, free of charge, replacement parts for
any part of the Accuride Slides that fails because of a manufacturing defect. You pay for the service
trip to your home and for service labor charges.

This warranty is extended to the original purchaser and any succeeding owner for products
purchased for ordinary home use in the 48 mainland states, Hawaii and Washington, D.C.
In Alaska the warranty is the same except that it is LIMITED because you must pay to ship
the product to the service shop or for the service technician’s travel costs to your home.

All warranty service will be provided by our Factory Service Centers or by our authorized Customer
Care® servicers during normal working hours.

Should your appliance need service, during warranty period or beyond, in the U.S.A.
call 800.444.1845. In Canada: 888.880.3030.

Some states do not allow the exclusion or limitation of incidental or consequential damages, so the
above limitation or exclusion may not apply to you. This warranty gives you specific legal rights, and
you may also have other rights which vary from state to state. To know what your legal rights are in
your state, consult your local or state consumer affairs office or your state’s Attorney General.

Warrantor: General Electric Company, Louisville, KY 40225

WHAT IS NOT
COVERED

• Service trips to your home to teach you how
to use the product.

• Replacement of house fuses or resetting of
circuit breakers.

• Damage to the product caused by accident,
fire, floods or acts of God.

• Failure of the product if it is used for
other than its intended purpose or used
commercially.

• Improper installation.
If you have an installation problem, contact

your dealer or installer. You are responsible for
providing adequate electrical, plumbing and
other connecting facilities.

• Loss of food due to spoilage.

• Incidental or consequential damage caused by

possible defects with this appliance.

– 63 –