Mitsubishi Electronics MR-G50J-SS-NZ User Manual

SERVICE MANUAL

HOME REFRIGERATOR

Model

MR-G50J-SS-NZ

No. OA090

Model name
indication
(Inside a door)

NZ············New Zealand

NOTE:

• RoHS compliant products have <G> mark on the spec name plate.

1. FEATURES ····················································································2

2. SPECIFICATIONS··········································································3

3. WIRING DIAGRAM ········································································5

4. OUTLINES AND DIMENSIONS·····················································7

5. REFRIGERANT CIRCUIT ······························································8

6. TROUBLESHOOTING···································································9
6-1 FUNCTION OF OPERATION PANEL ···································9
6-2 FLOWCHART OF SELF-CHECK········································14
6-3 BLOCK DIAGRAM OF PRINTED CIRCUIT BOARD ·········17
6-4 AUTO ICE MAKER······························································17
6-5 FLOWCHART OF TROUBLE CRITERION ·························19
6-6 TROUBLE CRITERION OF MAIN PARTS··························26
6-7 TEST POINT DIAGRAM OF FILTER BOARD····················31
6-8 TEST POINT DIAGRAM OF CONTROL BOARD ···············32

7. NAMES OF THE PARTS·····························································33

8. DISASSEMBLY INSTRUCTIONS················································34

9. RoHS PARTS LIST ······································································41

CONTENTS

1

FEATURES

MR-G50J-NZ

1. Vegetable compartment

(1)Mechanism

Two LED lights are mounted on the back and bottom
of the vegetable compartment. The LED (UV LED)
emits 375nm light, which is the effective wavelength
for biosynthesis of polyphenol. This revolutionary
vegetable compartment stimulates self-defense
function of vegetables and increases polyphenol by
irradiating ultraviolet light to vegetables for a certain
period of time.

* The lighting of LED is not controlled by opening or closing of the

vegetable compartment door. Thus, the LED may not be lighted
when the door is opened.

(2)Effect

Polyphenol in vegetables increased by 10% compared
to the time of purchase, and the amount of retained
polyphenol was 1.2 times more than that of the
vegetables preserved in prior refrigerators without light
radiation. (See graph)

Among different wavelength of light included in sunlight, lights of wavelength that "stimulates
photosynthesis" and "stimulates polyphenol increase" are used in the vegetable compartment.

Rate of change in amount of polyphenol
(Cress stored for three days)

About 1.2 times more
polyphenol retained

New vegetable
compartment

Amount of polyphenol at the time of purchase

2002 MITSUBISHI
refrigerator
MR-S46B

375nm LED effective for
biosynthesis of polyphenol

590 nm LED effective for
photosynthesis

2. " Auto Door Shut" function installed enable doors to be shut easily.

"Auto Door Shut" function automatically closes the door when its opened angle is less than 20 degrees.

3. Easy Access Vegetable room, Easy Access Freezer Room

The slide rollers enable smooth movement of vegetable
and freezer rooms.
Double rails allow the rooms to be pulled out completely,
providing easy access to even the back of the rooms.

2

▼Slide rollers

2

230V,50Hz

492 (R:264 F:82 V:97 I:12 S:37)

1798 x 745 x 699 (70-25/32 x 29-11/32 x 27-17/32)

Acrylic resin coated steel

ABS resin
Foamed polyurethane (Cyclopentane)
Foamed polyurethane (Cyclopentane)
Foamed polyurethane (Cyclopentane)

Forced air convection
Forced air convection

Fin and tube type

Cabinet, cabinet ceiling, sides, back and front flange

Automatic heater defrost

Automatic drainage, Forced evaporation method

Automatic control

240V,10W (E12)

99

110

{1.6 x {0.63 x 2680 / {1.8 x {0.67 x 2680

9

82

187 (FREOL S10)

kg
kg

mm

g
g
g

V,Hz

L

mm (inches)

Unit
Shipping

Weight

Accessories

Evaporator
Condenser
Defrost system
Drain
Temperature control system
Refrigerator compartment room light

Power supply
Total capacity
Dimensions (H x W x D)
Cabinet
Food liner

Cabinet
Freezer door

Refrigerator door
Freezer

Refrigerator

Insulation

Cooling system

Capillary tube
Desiccant (molecular sieve)
Refrigerant filling capacity R600a
Refrigerating oil (Model)

Free pocket (L)
Free pocket (S)
Bottle pocket (S)
Bottle pocket (L)
Tube stand
Height adjustable shelf
Three-way flexishelf
Two-way flexishelf
Small item case
Free egg shelf
Slide chilled case
Slide chilled case lid
Versa case
Aluminum tray (Versa case)
Water tank (With light-type bacteria removing filter)
Freezing case (upper)
Freezing case (lower)
Ice server
Sound proof mat
Ice storage bin
Vegetable case
Vegetable stand
Sliding case (Vegetable case)
Drain pan
Toe grille

2pcs.
2pcs.

1pc.
1pc.
1pc.
1pc.
1pc.

1pc.
2pcs.
2pcs.

1pc.

1pc.

1pc.

1pc.

1pc.

1pc.

1pc.

1pc.

1pc.

1pc.

1pc.

1pc.

1pc.

1pc.

1pc.

SPECIFICATIONS

SPECIFICATIONS

MR-G50J-NZ

3

W

A
A

°C

Sec.

A

°C
°C

W

rpm

W

rpm

°C

Compressor

Motor protector

Heater
(Rating)

Freezer
compartment

Refrigerator

Machine
Chamber

Fan motor

Defrosting

control

Ice maker temperature

Model
Power supply

Rated input
Starting current
Running current
Winding resistance (A.T.20°C)
Model
Ambient temperature
Time
Current
Model
Type
Model
Specification

Defrost finish
Thermal fuse
Defrost heater
Deodorizing function of defrost heater
Model
Type
Input
Revolution
Number of poles
Model
Type
Input
Revolution
Number of poles
Water pipe heater
Rotational heater board
Divider heater (I/S)
Vegetable compartment heater 1

Vegetable compartment heater 2
Ice making tray heater

ETI100E 13DAH

230V,50Hz

45/159 (1620/4800rps)

2.0 (Current limiter)

0.63/2.19 (1620/4800rps)

9.27"

MM3-71CCV

25

16 or less

17.0

NSCE001DC1

4-phase stepping motor drive voltage DC12V

325" (230V,163W)

Control board

Microcomputer

Thermistor 14±1.5

70±2

Not Equipped

UDQM002B3

DC brushless motor

2.4 (12V DC)

1520 (12V DC)

10P

UDQM004B3

DC brushless motor

1 (12V DC)

1200 (12V DC)

10P
230V-8.0W
230V-8.0W
230V-5.5W
230V-9.0W
230V-9.0W

220V-10.0W

-11.6

Defrosting
timer

Three-way valve

:
:
:
:
:
:
:
:
:
:
:
:

Temperature control

ON

-20.3

-17.6

-14.9
–
–
–
–
–
–
–
–
–

OFF

-24.1

-21.4

-18.7
–
–
–
–
–
–
–
–
–

OPEN

-0.6

1.6

4.8
–
–
–
–
–
–
–
–
–

SHUT

-1.8

0.4

3.5
–
–
–
–
–
–
–
–
–

Dial position
HI
MID
LOW
REFRIGERATOR
CHILLED
LOW (Soft freezing)
MID (Soft freezing)
HI

(Soft freezing)
FREEZER
ICE MAKING
ICE MAKING STOP
CRYSTAL ICE MAKING

Model

NTC thermistor

Freezer

Compressor HeaterMotor damper

Refrigerator

ON

2.3

3.2

4.2
–
–
–
–
–
–
–
–
–

OFF

3.5

4.5

5.4
–
–
–
–
–
–
–
–
–

OPEN

–
–
–

4.4

1.8

-2.3

-4.0

-5.9

-17.1
–
–
–

SHUT

–
–
–

2.4

-0.1

-4.0

-5.9

-7.7

-20.4
–
–
–

VegetableVersa

OPEN

–
–
–
–

-1.0
–
–
–
–
–
–
–

SHUT

–
–
–
–

-2.3
–
–
–
–
–
–
–

OPEN

–
–
–

1.2
–
–
–
–
–

-20.2

-20.2

-20.2

SHUT

–
–
–

-0.1
–
–
–
–
–

-23.1

-23.1

-23.1

Slide chilled Ice making

ELECTRICAL PARTS SPECIFICATIONS

MR-G50J-NZ

4

3

ICE MAKING TRAY HEATER

Vegetable compartment heater 2

Vegetable compartment heater 1

CONTROL BOARD, N/F BOARD

INVERTER

GRAY

GRAYREDRED

GRAYREDRED

DEFROST HEATER

WHITE WHITE

RED

RED GRAY

GRAY

WHITEWHITE

WATER PIPE HEATER

YELLOW

BLACK

FAN MOTOR (FOR COMPRESSOR)

LIGHT GREEN

BLACK

ORANGE

BRIGHT YELLOW

FAN MOTOR

LED

THERMAL FUSE (73:)

VIOLET

RED

BLACK

LIGHT GREEN

DIVIDER HEATER (I/S)

YELLOW

GREEN

YELLOW GREEN

WHITE

ROTATIONAL HEATER BOARD

COMPRESSOR

ORANGE

GRAY

V

WU

WHITEWHITE

GRAY

GRAY

GRAY

GRAYRED

REDRED

BLUE

BLACK

WHITE

RED

YELLOW

VIOLET

GRAY

R-COMPARTMENT ROOM LIGHT

YELLOW

YELLOW

VIOLET

MOTOR PROTECTOR

L N

PLUG

Vegetable compartment LED board

BLACK

WATER PUMP

VIOLET

VIOLET

WHITE

THREE-WAY

VALVE

WHITE

WHITE

RED

LIGHT BROWN

SKY BLUE

VERSA.THERMISTOR

I.THERMISTOR

YELLOW

GREEN

BLUE

LIGHT

GREEN

PINK

BRIGHT

YELLOW

YELLOW

BROWN

F.THERMISTOR

C.THERMISTOR

R.THERMISTOR

WHITE

WHITE

ORANGE

WHITE

WHITE

ICE-TRAY THERMISTOR

WHITE

WHITE

WHITE

WHITE

WHITE

WHITE

SKY BLUE

WHITE

WHITE

WHITE

WHITE

V.THERMISTOR

WHITE

WHITE

DEF.THERMISTOR

YELLOW

BLUE

ORANGE

BLACK

VIOLET

YELLOW

RED

BLUE

SKY BLUE

RED

WHITE

SKY BLUE

BLACK

GRAY

PINK

PINK

LIGHT BROWN

YELLOW GREEN

BROWN

RED

YELLOW

WHITE

BLUE

BLUE

WHITE

YELLOW

RED

WHITE / RED

BROWN

MOTOR DAMPER MOTOR DAMPER MOTOR DAMPER

BLUE

WHITE

RED

YELLOW WHITE / RED

(LIQUID CRYSTAL DISPLAY)

TEMP. CONTROL BOARD

DOOR SWITCH.(FOR R-COMPARTMENT & ICE MAKING COMPARTMENT)

ICE GEAR BOX

F1 :10A FUSE
FUSE1

: 3A FUSE

ON THE BOARD

W

WHEN THE DOORS ARE CLOSED.

WIRING DIAGRAM

MR-G50J-NZ

( SKELTON WIRING DIAGRAM )

I.THERMISTOR (Ice making compartment thermistor)
V.THERMISTOR (Vegetable compartment thermistor)
VERSA.THERMISTOR (Versa compartment thermistor)
DEF.THERMISTOR (Defrost thermistor)
ICE-TRAYTHERMISTOR (Ice making tray thermistor)
F.THERMISTOR (Freezer compartment thermistor)
C.THERMISTOR (Slide chilled compartment thermistor)
R.THERMISTOR (Refrigerator compartment thermistor)

5

MR-G50J-NZ

SSR4 SSR3SSR5

FUSE1

X1SSR1

SSR2

F1

L

N

N

L

AC230V

Power
Plug

50Hz

N/F BOARD

CN1

1

3

3

1

CN12

8

2
3
4

1

4321

Electric
box

1
2
3

5
6

2
3
4

1

4 3 12

4 23

21

87652 3 41

6541 2 3

6

5

4

3

2

1

7
8

4

MOTOR DAMPER

F.THERMISTOR

THERMAL
FUSE (73:)

CN9D

4
3
2
1

2

4

1

3

56

57 692110

12

21

1112

9

2 3 4

1

1

2

2

1

4 3 12 16151413 1112 10 9 78

6 5

4

3

2

1

CN4D

8

1

2

3

4

1

WATER PIPE
HEATER

S.THERMISTOR

DIVIDER HEATER
(I/S)

FAN MOTOR

ICE-TRAY

HEATER
ICE-TRAY
THERMISTOR

ICE-GEAR BOX

I.THER­MISTOR

MOTOR
DAMPER

Versa
Compartment

WATER PUMP

LED

652 3 4

1

6542 3

1

652 3 4

1

V. THERMISTOR

Vegetable compartment
LED board

CN8K

CONTROL BOARD

Refrigerator compartment door

Refrigerator
Compartment

Vegetable
compartment

Vegetable compartment door

Freezer compartment door

Ice compartment / versa compartment door

Freezer
Compartment

C. THERMISTOR

R. THERMISTOR

R-COMPARTMENT
ROOM LIGHT

MOTOR DAMPER
Slide

Compartment

26

9

7 13

5

CN50G

3 1

CN2A

57 3 1

CN3A

8 7 5 4 13

CN7S

1110

1

432

1
2

DEF.THERMISTOR

4

2 3 41

Machine
chamber
fan motor

3

2

1

MOTOR
PROTECTOR

Machine
chamber
compartment

COMPRESSOR
(View from rear
left side)

3
2

1

1 2 3 4 65

VEGETABLE
COMPARTMENT
HEATER 2

DEFROST HEATER

2

1

5

7

Three-way

valve

14

91

24

1

1 2 3

4

5

56

11

Brown

Blue

Violet

Gray

INVERTER

White

Black

Red

Yellow

Yellow

Blue

Black

Light brown

Blue

Brown

Yellow

Yellow green

Pink

Gray

Pink

Black

Black

Black

Violet

Yellow

Blue

White

Red / White

Red

Brown

Pink

Brown

White

Red

Yellow

Blue

Black

Blue
Red

Blue Blue

Red Red

Yellow green
White
Red / White

Sky blue

White White

White
White

Yellow

White

Red

Orange

White
White

Yellow
Gray
Orange

White

White
White

Light brown

Red

Sky blue

Sky blue

Sky blue

Sky blue
Sky blue

Blue

Blue

Light green

Light green

Sky blue

Yellow

Yellow

Red

Red

Rotational heater board

Violet

Light green

Orange

Red / White

Light green

Yellow green

Orange

Light green

Bright yellow

Blue

White

Red

Light green

Orange

Sky blue

Bright yellow

White

Yellow green

Red

Gray

Gray

Gray

Gray

Red

Yellow

White

Brown

Violet

Blue

Gray

Red

Sky blue

Ice
compartment

Red

Violet

Violet

Light green

Orange

Black

Violet

Light green

Orange

Black

Violet

Violet

Gray

Black

White

Red

Yellow

Yellow

Violet

Violet

Black

Black

Orange

Violet

Yellow

Blue

White

Red

Light green

Orange

Black

Pink

Red
Blue

WhiteWhite
Red

Sky blue

Black

White

White

Black
Violet

Red

Pink

Yellow

Violet

Bright yellow

Yellow

White

White

White

Red

Blue

Blue
Red
White
Yellow

Gray

Gray

Yellow

White

White

White

White

White

Gray

White

Red

Sky blue

Light brown

Yellow green

Blue

Pink

Pink

Yellow

Violet

Brown

White

Yellow

White

White

Red

Blue

Yellow

White

Red

Blue

Red

Vegetable
compartment
heater 1

White

White

Blue

Yellow

Red

White

Yellow

Black

Violet

White
White

Gray
Yellow green

Yellow green

Gray

Bright yellow

Black

Yellow

Violet

White

Sky blue

Red / white

Bright yellow

Red

Brown

Sky blue

Gray

Brown

White

Sky blue

Light green

Blue

Sky blue

Red

White

DOOR SWITCH

(FOR R-COMPARTMENT

& ICE COMPARTMENT)

Gray

Red

White

Gray

Sky blue

black

Pink

Gray

Red

Black

White

White

Red

White

Gray

Gray

Gray

Yellow

White

Brown

Sky blue

White

White

Sky blue

White

Gray

White

Gray

BOARD

TEMP. CONTROL

Black

Yellow green

Light green

Yellow green

Bright yellow

Sky blue

( ACTUAL WIRING DIAGRAM )

I.THERMISTOR (Ice making compartment thermistor)
V.THERMISTOR (Vegetable compartment thermistor)
S.THERMISTOR (Versa compartment thermistor)
DEF.THERMISTOR (Defrost thermistor)
ICE-TRAY THERMISTOR (Ice making tray thermistor)
F.THERMISTOR (Freezer compartment thermistor)
C.THERMISTOR (Slide chilled compartment thermistor)
R.THERMISTOR (Refrigerator compartment thermistor)

( When the doors are closed. )

6

4

2500

100

930

1809

1100

745

20

REQUIRED SPACE FOR INSTALLATION

20

699

247

338

77

324

324

318

313

400

351

392

440

337

363

329

262

249

249

534
600

67

782214361

5

740 (Cabinet)

745 (Display)

361

1798 (Display)

1287 8

727(Pitch between the front wheels)

691(Pitch between the adjust bolts)

669(Pitch between the rear wheels)

162

7676

275

284

456

5

284

456

699

124

162

124

142

312

284

99

168

101

123

124

720

52

607

10

307

37

332 176

41

1072

(Display)

642

654

374

655

196

203

203

367

610

612

601

654

607

OUTLINES AND DIMENSIONS

MR-G50J-NZ

Unit : mm

H
W

R(L)
782
284

R(R)

782
456

I
214
284

S
214
456

V
361
745

F
361
745

R(L) : Refrigerator compartment (Left)
R(R) : Refrigerator compartment (Right)

I : Ice making compartment
S : Select compartment [Versa compartment]
V : Vegetable compartment
F : Freezer compartment

7

5

REFRIGERANT CIRCUIT

MR-G50J-NZ

Muffler

Evaporator

Suction pipe

Charge pipe
(Low pressure side)

{6.35

Charge pipe
(High pressure side)

{4

Compressor

Radiator
plate

Dryer
#150

Capillary tube

{1.8✕{0.63✕2680(mm)

Cabinet pipe

Three-way
valve

Capillary tube

{

1.6✕{0.67✕2680(mm)

8

6

ECO MODE switch

:

Min

REF

VEG

FZR

QCK

REF
CHILL
SOFTF

F Z R

ICE

(

STOP

)

DEO

L M H

VEG

QCK ICE

REG ICE

ECO

CRL ICE

VR

D

L

M
H

MODE switch

●The switch functions to
select the required
compartment.

Press switch and display the
required compartment to apply the
function of temperature adjustment
or quick mode.

SELECTION switch

When setting the operation mode
of refrigerator, vegetable, and
freezer compartment to "Middle" at
the same time.

Press switch for about 3 seconds
until a "beep" sound is heard.

●The switch functions to set the
operation mode or temperature
of compartments individually.

QUICK MODE switch

Quick mode is finished
automatically.

It automatically
finishes about 2 hours later.

●Each compartment can
be cooled rapidly.

When stopping
quick mode halfway

When stopping
quick mode of all
compartments at once

Press switch again.

Press switch for about
3 seconds against one of the
compartments which is in
QUICK MODE.

w

●Each compartment
can be operated with
energy saved.

Convenient function

1

Cooking timer

Press switch and switch for 1 second at the same time. ( is displayed.)
(Cooking timer can be released in the same way.)
Cooking timer mode is set and "0" blinks.

Set the time with switch. ➝ Press to start ➝ Alarm sound will annonce the

completion of cooking period.

(1~99 minutes) (To stop the timer halfway through the operation, press

again).

2

Child lock

Press switch and switch for 3 seconds at the same time.
( is displayed.)
(Child lock can be released in the same way.)

3

Ice making stop

Press to select "ice making compartment".
➝ Select with switch.

ICE(STOP)

4

ON/OFF of LED for bacteria removal from water tank

to select "vegetable compartment".
Press switch and switch for 3 seconds at the same time.

Approx.

0 to 6

:



Approx. 0 to 6

:

Approx.

-2 to 2

:



Approx.

-9 to -5

:



Approx.

-18 to -16

:

Approx.

0 to 6

:



Approx.

-21 to -17

:



Approx.

-21 to -17

:



Approx.

3 to 9

:



Approx.

-21 to -17

:





Operating mode and Temperature range

Compartment

Refrigeratorcompartment

Middle
Refrigerator

Chilled
Soft freezing (Middle)
Freezer
Refrigerator
Ice making
Ice making stop
Middle
Middle

Versa
compartment

Ice making
compartment

Vegetable compartment
Freezer compartment

Mode Temp range

wThe temp range above is based on the data measured at the center of each
compartment with the door closed and with no food inside under the condition of
ambient temperature 30:. The range varies depending on circumstances.

To reset the unit to the initial setting, press
for 3 seconds. The setting of the refrigerator
compartment, vegetable compartment, and
the freezer compartment will be set to "Middle",
and fast cooling operation, energy-saving
operation, and cooking timer setting for all
compartments will be canceled.

w

To use "ice making compartment" as "refrigerator
compartment"

1Press to select "ice making compartment."
2Press for about 3 seconds and let flash.

4To get back to "ice making", just change the temperature

setting.

3After ice-making compartment is set to function as refrigerator,
take ice or water out of the ice tray which are automatically
dropped into ice storage bin. When ice-making function
will not be used for a while, wash the water tank well with
water and place it back after drying thoroughly.

R E FR E F

( is displayed.)

TROUBLESHOOTING

6-1 FUNCTION OF OPERATION PANEL
MR-G50J-NZ
(1) Function of normal operation

9

(2) Demonstration mode for shop display

L

M
H

L

M
H

L

M

H

R E F

F Z R

L

M

H

R E F

F Z R

Demonstration mode is not available when the temperature of freezer compartment is -7: or less even if ,
and are simultaneously pressed for about 5 seconds and a “beep” sound is heard. Cooling operation starts
instead.

11

Setting

●Within one minute after power supply is turned on, simultaneously press , , and switch for about
5 seconds with the door of ice making compartment left open. When the setting is complete, a “beep” sound is heard
and “D” is displayed.

22

Panel operation mode during demonstration mode

The panel operation mode changes to “manual” if any of the switches is pressed and it changes to “auto” if none of the

switches is pressed within 3 minutes after demonstration mode is set.
Manual mode: Panel indication changes according to switch operation.

Auto mode: Panel indication is automatically changed.

33

Release

●Simultaneously press , and switch for about 5 seconds with the door of ice making compartment left open.
When the function is released, a “beep” sound is heard. “D” disappears and the panel indication gets back to normal.

Note: Follow the procedure above to release demonstration mode as it cannot be released by simply turning

on/off the power supply.

(3) Fine adjustment of temperature

Fine adjustment of temperature is available for refrigerator compartment, freezer compartment and versa
compartment.

As for versa compartment, however, it is only available when the compartment is set to or .

11

Setting

●Press switch to select refrigerator compartment, freezer compartment or versa compartment.

●Simultaneously press and for about 3 seconds until a “beep” sound is heard.

●The indication changes as show in the right.

22

Fine adjustments of temperature

Temperature adjustment is made by approximately 0.3-0.5: by pressing and it is indicated with 15-steps bars

on the panel. The temperature displayed on the panel, however, changes by 1: and might not change according to
fine adjustment.
Example of display:

In case of versa compartment

●Press to make versa compartment function as refrigerator or freezer .

When the blinking marks on the display, or , are lit in 3 seconds, apply fine adjustment of temperature.

33

Release

Follow the same procedure as setting and the finely-adjusted temperatures are reset for refrigerator compartment, freezer
compartment and versa compartment at once.

(4) Ice making test / Self-check

This function is not available during the following modes: Child lock, Demonstration, Cooking timer, Changing the
rotational speed of compressor, and Error code display.

11

Setting

●Press for about five seconds.

22

Operation and its display

●While automatic ice making is testing, the indication of ice making compartment setting blinks on LCD.

●When something is faulty, the error code is indicated.

33

Release

The test automatically finishes in 10 minutes and the error code changes to temperature display.

(5) Thermistor temperature check mode

11

Setting

●With the door of ice making compartment left open, simultaneously press and for about 3 seconds until a
“beep” sound is heard and “88” blinks.

●Press with the door left open.

10

22

d

-28

TEMP

TEMP

52

TEMP

Display

After the setting is complete, the kinds of thermistor and its temperature are alternately shown on the panel.

In case of abnormality, the display returns to current temperature. Please note that the temperature detected
by thermistor may be a little different from the real one due to the influence of refrigerator temperature.

Kind of

thermistor

Display

Defrosting

Refrigerator

compartment

Slide chilled

compartment

Ice making

compartment

Versa

compartment

Ice making

tray

Vegetable

compartment

(d) (R) (C) (K) (S) (I) (V) (F) (O)

Freezer

compartment

Outside air

33

Change of display

●While thermistor temperature check mode is set, press . Ashort beep sound is heard at each press
and the thermistor is changed in the order below.

Defrosting Refrigerator compartment Slide chilled compartment

Ice making compartment Versa compartment Ice making tray
Vegetable compartment Freezer compartment Outside air

W The defrosting thermistor is always selected first at the beginning of the setting.

44

Release

●With the door of ice making compartment left open, simultaneously press and

for about 3 seconds until a beep sound is heard. The temperature of thermistor disappears
and the display gets back to current temperature.

●The function is automatically released one-hour later.

●Follow the procedure above to release this mode. For the prevention of the compressor, avoid releasing

it by plugging and unplugging the power cord.

(Ex.) When defrost

thermistor
reads -28:.

(6) Change mode of compressor rotational speed

Operation sound can be checked by changing the rotational speed of compressor. Always conduct a check while the
compressor is operating and the “-” mark is not on the display, which shows the compressor stops. If the “-” mark is on the
display, unplug the power cord and then plug it in a few seconds to operate the compressor. Also, this function is not
available during the following modes: Child lock, Demonstration, Cooking timer, Thermistor temperature check and error
code display.

11

Setting

●With the door of ice making compartment left open, simultaneously press and
for about 3 seconds until a “beep” sound is heard, and “88” blinks.

●Press with the door left open.

(Ex.) When the rotational

speed is 52 rps

22

Changing the rotational speed

●After the setting is complete, press and the rotational speed of compressor alternately changes in 6 steps.

The rotational speed (rps) is shown on the panel. Basically the compressor starts operating at level 5, however, it depends
on model or specification change.

Level 0 Level 1 Level 2 Level 3 Level 4 Level 5

Low speed

W Note: Operation sound may get increased in the process of changing the speed, but that does not mean any

33

ON and OFF of machine chamber fan motor

Under this function, fan motor in machine chamber can be switched on and off at each press of switch.

The on/off state is shown with mark on the panel.

44

Release

●With the door of ice making compartment left open, simultaneously press and for about 3 seconds until a
“beep” sound is heard. The screen returns to the temperature display.

●The function is automatically released one-hour later.

●Follow the procedure above to release this function. For the prevention of the compressor, avoid releasing it by plugging

and unplugging the power cord.

problem. Check the operation sound when the rotation is stabilized.

Machine chamber fan motor

ON

OFF

Display of
Displayed
Not displayed

11

Normal

High speed

(7) Damper Operation Mode

(1)Damper to
be set up

(2)" " to open,
" " to close

0

TEMP

Ice making compartment

Freezer compartment

Slide chilled compartment

Refrigerator compartment

REF

FZR

CHILL

VR

Versa compartment

During damper operation mode, the damper is forcibly opened and closed and the state of

damper is shown on the panel.

11

Setting

●With the ice making compartment door left open, simultaneously press and for about 3 seconds until a
“beep” sound is heard, and “88” blinks.

●With the door left open, simultaneously press and for about 3 seconds until a “beep” sound is heard.

22

Status display of each damper

Each compartment display turns on when each damper is open and turns off when each damper is closed.
Ex.) When all dampers are open;

33

How to make each damper open or close

Although the state is shown on the panel, check airflow and confirm the damper is really opened or closed. However, air

does not come out when the door is closed, so put a magnet on the door switch to simulate the condition of the door closed.

●Change of display

Kind of

damper

Refrigerator

compartment

Slide chilled

compartment

Ice making

compartment

Versa

compartment

Freezer

compartment

(Ex.) When making the damper of

refrigerator compartment
open

Display

(R) (C) (I) (S) (F)

(1)Press to select the damper to be set up.

A “beep” sound is heard and the kind of damper is changed every time is pressed.

Refrigerator compartment Slide chilled compartment Ice making compartment

Versa compartment Freezer compartment

(2)Press to “0” to open the damper or “ ” to close the damper.

(3)Press for about 3 seconds to convey the setting to the damper.

A“beep”sound is heard if the setting has been conveyed.
After the setting is conveyed, the damper starts operating
and the display blinks. It stops blinking and starts to light
when the operation stops automatically. Please note that the
setting cannot be changed when the damper is operating.

44

Release

●With the door of ice making compartment left open, simultaneously press and for about 3 seconds until a

“beep” sound is heard. The screen returns to the temperature display.

●This function is not automatically released.

●Follow the procedure above to release this function. For the prevention of the compressor, avoid releasing it by plugging

and unplugging the power cord.

As the damper of slide chilled compartment opens and
closes in conjunction with the damper of refrigerator
compartment, it is necessary to set them to the either
of the following.

How to set

Open
Close

Open Close
Close Close

Open
Open

00

Set to

and then set to 00.

Not available

Set to 00and then set to .

Set to .

12

(8) Error history display mode

Error history can be observed in the error history display mode.

Use this mode when the actual problem of the refrigerator is different from the error which
was displayed at the service-call received.

11

Setting

●Open the door of the ice making compartment, and press and together
for 3 seconds until a “beep” is heard and and “88” blinks.

●With the door left open, press and together for 3 seconds until a “beep” is heard.

22

Display details

●Same as the error display and trouble locating. (Refer to 6.2(3))

●When there is no recorded error, “ — ” will be displayed.

●When several errors have occurred, error will be displayed in the increasing numerical

order, as in the error display and trouble locating.

(Ex.) In case errors in the ice tray thermistor (e10), refrigerator thermistor (e13) and
refrigerator fan motor (e31) have occurred:

ee➝1100➝1133➝3311➝ee➝1100➝1133➝3311

33

Check points and resetting the error history

●Follow the treatment procedures shown in the self-check.

●After the treatment, press for 3 seconds to reset the error history.

“ — ” will be displayed when the data is reset successfully.

●Perform the self-check again (Refer to 6.2) to confirm there are no dysfunctions.

44

Release

●Open the door of the ice making compartment, and press and together

for 3 seconds until a “beep” is heard.

The display will return to the normal temperature display.

●Function is automatically released in an hour.

●Follow the procedure above to release this function. For the prevention of the compressor, avoid releasing it by plugging

and unplugging the power cord.

·····

(Ex.) When there is problem

with the ice maker gear box.

Door Buzzer System :

Door buzzer has been installed so that one will not forget to close the door.
When the door of refrigerator compartment or ice making compartment is left open for a minute, the buzzer starts ringing and
informs that the door needs to be closed.

When door is left open for:
Buzzer

1 minute- 4 minutes
Buzzer rings every 1 minute

More than 5 minutes
Keeps ringing

The buzzer will stop ringing as soon as the door is closed.
However, this buzzer system does not work when the door is not widely open like when something is pinched between the

door and refrigerator.
If the door is not closed completely, the temperature inside the refrigerator will rise and it will be a cause of spoiling the food

inside.
When the buzzer does not stop even if all the doors are closed, abnormality may occur in door switch.

If the buzzer keeps ringing and annoying, it can be stopped by the following operations.

1 Perform the ice making test operation.

(Note: If the test is conducted with water in the ice tray, water may fall into the ice storage bin because the tray is rolled over

in the ice making operation.)

Buzzer sounds when a trouble is found in refrigerator fan motor or in machine chamber fan motor. The buzzer sounds every
time the door is closed until the fan motor gets to operate correctly.

(Check the error code by following the steps in Specification of display in self-check result on page 14.)

13

6-2 FLOWCHART OF SELF-CHECK

A

Self-check

Error history mode (Refer to 6.1(8))
Problem may recover automatically.
Perform the following if error is not displayed
before treatment or the error which was displayed
at the time power of the unit was turned on is not displayed.

Operate the ice-making test.
(Current displayed error: Refer to 1
in the table below.)
The display of ice making compart­ment setting will blink during the test.

c

D

D

Self-check

Plug the power cord into outlet.
(Current displayed error:
Refer to 2 in the table below.)

Locate the trouble according to LED
indication. (See page 15,16)

Is error displayed?

Is error displayed?

Is error displayed?

Release error displayed
mode, and the self-check
is finished.

Release error display
mode and perform the
self-check again.
(go to A)

Note1: Self-check cannot detect abnormalities in the following parts.

See page 19-31 for troubleshooting.
Door switch
Motor damper
Heater (Water pipe / Vegetable compartment heater, etc.)
Water pump motor

Note2: If any abnormality is found when switch is turned on, compressor

and fan motor are suspended for 10 minutes.

Note3: The alarm beeps when some abnormalities (motor-locked) have

occurred at the refrigerator fan motor restarts its normal operation.

Note4: If any abnormality occurs in compressor's inverter circuit,

the compressor and the refrigerator fan motor stop for 10 minutes
(not only when plugging the power cord).

Yes

No

Is error displayed?

Was more than one error

displayed during repair?

No

Yes

No

Yes

NoYes

Yes

Yes

During the ice-making
test mode, watch the
operation ice-maker
gear box and water
pump in refrigerator.

*Wait 10 minutes
before inserting
the cord once
it's unplugged.
(if the cord is
plugged in within
10 minutes, error
may be displayed.)

B

Unplug the power cord from outlet.

Repair /replace defective part(s)
according to LCD indication.

Self-check is finished.

Set the error display mode.

Reset the error history.

(Refer to 6.1(8))

Perform self-check
procedures B through C.

Perform error
history mode.

No

No

Was the error which was

displayed at the service-call received

was turned on displayed?

Was treatment performed?

Perform error
history mode.

D

Operation method Display or self-check operation Display time OthersItem

1Ice making test operation.
All items except (*6) listed
up on the table at page
17 will be checked.

1.Conduct the automatic ice making test.
(The display of ice making compartment
setting is blinked)

2.When trouble is found, all error codes
except e50-e55 are displayed.

3.When error is not found, nothing is
displayed.

For 10 minutes
after setting.

Self-check is not available
during child lock, cooking
timer, changing the rotati­onal speed of compressor,
checking the temperature
of thermistor, damper ope­ration and demonstration
modes.

Self-check is not available
during child lock, cooking
timer, changing the rotati­onal speed of compressor,
checking the temperature
of thermistor, damper ope­ration and demonstration
modes.

Self-check is not available
during demonstration
mode.

For 10 minutes
after power is
supplied.

For one hour
after setting,
or until mode
is released.

1.When trouble is found, all trouble except

e50-e55 and displayed.

2.When error is not found, nothing is
displayed.

1.When trouble is found, all trouble except

e50-e55 and displayed.

2.When error is not found, nothing is
displayed.

Press the switch.
for 5 seconds.

Plug the power
cord into outlet.

Refer to 6.2(3)
Error history
display mode.

2Power input.
All items except (*6) listed
up on the table at page
17 will be checked.

3Error history

(current displayed error)

Self-check

Display error

history.

MR-G50J-NZ
(1) Troubleshooting with self-check

This refrigerator has self-check feature to clarify and indicate where & what the trouble is.
You can perform operation checks and identify malfunction of electric or electronic parts.
Error history is recorded and can be displayed by the refrigerator.

●Self-check and error display method and operation

●Release of self-check display mode

self-check finishes automatically. Error cord display is automatically released 10 minutes later.

14

(2) Timing in self-check

e

33

TEMP

TEMP

Trouble of Defrost heater : Self-check is conducted after defrosting.

Trouble of Ice maker : Press the switch on the panel for 5 seconds. (Ice making test mode.)

Trouble of Fan motor : Open the door and then closed it.

Trouble of Inverter : Check the error when compressor starts up or is operating.
Trouble of Thermistor : Self-check is continuously working

(Make sure to confirm the display before unplugging the power cord
because it is automatically reset once the power cord is pulled out.)

The setting of ice making compartment blinks on LCD during the test operation.
When abnormality is found in fan motor, buzzer sound is heard every time the door

is closed.

(3) Error display and trouble locating

1. Display details

After conducting the self-check by referring to 6-2(1), error codes are displayed in the tempera­ture display section. ”
When several errors occur, they are displayed alternately. However, the error whose code has
a smaller number has priority to be displayed first.

(Ex.) In case the errors of ice tray thermistor (

fan motor (

✻ For 2 minutes in self-check, a high-tone sound is heard due to the operation check of damper .

ee

” and two digit error code flashes alternately as shown in the right figure.

ee1100

ee3311

) are happening simultaneously;

), refrigerator thermistor (

ee➝1100➝1133➝3311➝ee➝1100➝1133➝3311

ee1133

) and refrigerator

·····

2. Check point and treatment

Display Error code

Testing

(*1)

e

02

e

e 03

e 10

e

LCD

Self-check

e

e

e

e

e

01

(*5)
Communication
error of
operation panel

Communication
error of inverter

Trouble of
model judge­ment

Trouble of ice
making tray
thermistor

Trouble of
freezer com-

11

partment
thermistor

Trouble of
defrost

12

thermistor
Trouble of

refrigerator

13

thermistor

Trouble of
chilled compart-

14

ment thermistor

Trouble of
versa compart­ment thermis­tor

15

Trouble of veg­etable compart-

16

ment thermistor

Trouble

Detecting method

(*3)

Ice maker is under testing

When the following communi­cation errors occur
between control board and
operation P.C. board:

•They transmit and receive
data that has nothing to do
with settings.

•They cannot transmit and
receive data each other
for about two seconds.

When abnormality is found in
the communication between
refrigerator control circuit and
inverter control circuit in con­trol board. (When they do not
transmit and receive data for
10 seconds.)

When the model of con­trol board is different from
the one of operation P.C.
board.

When there is a short or
open circuit in the ice
making tray thermistor.

When there is a short or
open circuit in the freezer
compartment thermistor.

When there is a short or
open circuit in the defrost
thermistor.

When there is a short or
open circuit in the refrig­erator compartment ther­mistor.

When there is a short or
open circuit in the chilled
compartment thermistor.

When there is a short or
open circuit in the versa
compartment thermistor.

When there is a short or
open circuit in the veg­etable compartment ther­mistor .

Check point Treatment

1. Connector CN8K, CN7S on control board
4-pin relay connector (hinge)
4-pin connector on operation P.C. board

2. Trouble of control board and operation

P.C. board

1. Check the model name of control board

2. Check the operation p.c. board.

1. Connector CN7S on control board, Ice gear

box 6-pin relay connector, 8-pin relay
connector

2. Check the resistance of thermistor.

1. Connector CN7S on control board. 6-pin

relay connector

2. Check the resistance of thermistor.

1. Connector CN7S on control board. 2-pin

relay connector

2. Check the resistance of thermistor.

1. Connector CN7S on control board, 4-pin

relay connector

2. Check the resistance of thermistor.

1. Connector CN7S, on control board, 6-pin

relay connector

2. Check the resistance of thermistor.

1. Connector CN7S on control board, 6-pin

relay connector

2. Check the resistance of thermistor.

1.

Connector CN7S on control board, 4-pin
relay connector

2. Check the resistance of thermistor.

Repair the
contact failure.

Replace

Replace the
control
board.

Replace

Replace

Repair the
contact failure.

Replace

Repair the
contact failure.

Replace

Repair the
contact failure.

Replace

Repair the
contact failure.

Replace

Repair the
contact failure.

Replace

Repair the
contact failure.

Replace

Repair the
contact failure.

Replace

(Ex.) When ice maker gear

box is defective.

Control

Keep the same operation as
the one before the communi­cation error has occurred.

Compressor OFF.

Keep operating the unit, and
conduct error code indication
only.

When the compartment door
has been closed for 3 hours
and when freezer compartment
thermistor is -10: or less, ice­detecting operation starts.

After 10 minutes off, the
compressor repeats 30­minute ON and 20-minute
OFF.

The defrost heater won’t be
turned ON.

Synchronize the open/close
status of R damper with that
of C damper.

Synchronize the open/close
status of C damper with that
of R damper.

•When S-compartment is
used as “freezer”: S-damper
is open when compressor is
turned on, S-damper is
closed when compressor is
turned off.

•When S-compartment is
used other than “freezer”: S­damper remains open for
the first 3 minutes and then
closed for the rest of time.

S-compartment:

Versa(select) compartment.

•When R-damper is open,

V-heater is turned on.

•When R-damper is closed,

V-heater is turned off.

15

Display Error code

e

e

e

30

e

32

e

e

e

LCD

Self-check

e

e

e

e

e

e

54

Trouble of ice
making com­partment
thermistor

17

Trouble of out­side air ther-

18

mistor
Trouble of

defrost heater
(*6)

Trouble of refrig­erator fan motor

31

Trouble of
machine cham­ber fan motor

Trouble of ice
maker gear box

33

Clogging of
refrigerant
pipe or trouble

34

related to
compressor

Trouble of elec­tromagnetic

41

three-way valve
Trouble of invert-

er circuit

50

Trouble of bus-

51

bar voltage

Trouble of inverter
software reset

52

function

Trouble of startup
, synchronization
or overcurrent

53

detection

Trouble of power
supply voltage

Trouble

Detecting method

(*3)

When there is a short or
open circuit in the ice
making compartment
thermistor.

When there is a short or
open circuit in the out­side air thermistor.

When defrosting is not
finished in 2 hours.

•When motor doesn’t
rotate even though
power is on.

•When the waveform,
which indicates the rota­tion times of motor, can­not be detected.

•When motor doesn’t
rotate even though
power is on.

•When the waveform,
which indicates the rota­tion times of motor, can­not be detected.

When the gear box operation
is not finished in 30 seconds.

(T0: Defrost thermistor tem­perature at power input, T1:
Defrost thermistor tempera­ture when 15 minutes have
passed from the power input)

•When the difference

between T0 and T1 is

T0[T1. (*5)

When defrost thermistor reads

-10:or above in five minutes
after the compressor’s
startup.(*5)

•When there is any trouble in
the circuit which detects cur-

(*6)

rent of compressor.

•When the range of bus-bar

voltage is not approx. DC

(*6)

260-390V.

•When the inverter driving
software malfunctions.

•When there is no current at
compressor startup.

•When phase current exceeds

5.5A at compressor startup.

•When phase current exceeds

3.3A during compressor oper­ation.

•When current of 5.3A or more

(*6)

runs into the bus-bar of
control board.

When bus-bar voltage (full
wave voltage) is DC 390V or

(*6)

above in power input.

Check point

1. Connector CN7S on control board, 6-pin,
9-pin relay connector

2. Check the resistance of thermistor.

1. Connector CN2A on control board
Defrost heater plug and receptacle, 1-pin
relay connector

Thermal fuse 4-pin, 8-pin relay connector

2. Check the resistance of defrost heater.

3. Check the continuity of thermal fuse.

1. Connector CN4D on control board,
Refrigerator fan motor 6-pin relay connector

2. Check refrigerator fan motor operation.

1. Connector CN4D on control board,
4-pin connector, 4-pin relay connector

2. Check machine chamber fan motor operation.

1. Connector CN8K on control board,
Ice gear box 6-pin relay connector, 8-pin relay connec­tor

2. Ice gear box frozen point

3. Check the trouble of the ice gear box with the
ice making test operation.

Check the compressor and the pipe.

Connector CN9D on control board
5-pin connector in machine chamber

Refer to “Compressor does not operate” at page 21.

1. Different voltage of power supply outlet

2. Trouble of relay in the circuit on the control board

Treatment

Repair the
contact failure.

Replace

Replace the
operation
P.C. board.

Repair the
contact failure.

Replace
Replace

Repair the
contact failure.

Replace

Repair the
contact failure.

Replace

Repair the
contact failure.

Replace
Replace

Repair the
contact failure.

Replace
the control
board.

Control

•When ice making compart-

ment is used as “refrigera­tor”, synchronize I-damper
with R-damper.

•When ice making compart-

ment is used as “ice mak­ing”, synchronize I-damper
with F-damper.

Compressor is activated at
“Speed-level 2.”

The defrost heater is
stopped and if the next
defrosting finishes in 2
hours, the error code will
disappear .

•3 minutes later, the refrigerator

fan motor is reactivated to be
checked.

•Until the fan motor gets to oper­ate correctly, the buzzer sounds
every time the door is closed.

•3 minutes later, the machine

chamber fan motor is reactivated
to be checked.

•Until the fan motor gets to oper-

ate correctly, the buzzer sounds
every time the door is closed.

100 minutes later, the gear box is
reactivated to be checked again.

When cooling operation returns to
normal condition, the display of
error code disappears.

Check the operation of electro­magnetic three-way valve and
then open the valve.

The compressor is suspend­ed and reactivated 10 min­utes later.

Refrigerator compartment room
light OFF
Heaters. OFF

Trouble of con­trol board
(EEPROM

55

e

e

*1 : The setting of ice making compartment will be displayed and blinks during or after ice making test operation.
*2 : This operation is called the recovery operation:

If the damper has not operated ever once during the compressor operation, make the damper operate when the compressor stops.

*3 : When the resistance is ∞', the circuit is deemed open-circuitted.

When the resistance is 0', the circuit is deemed short-circuitted.

e01

*4 : Once
*5 : Characteristic value may change in order to improve the product.
*6 : The error codes

*7 : If those errors still continue for 1minute after the restart,

is detected, other errors would be ignored and not displayed on the panel.

e50

Therefore, be sure to perform ice making test operation in order to check if any abnormality indicated by these error codes occurs. (See page 14.)

related trouble)

Defective wiring
continuity or
trouble of control
board

56

e55

to

are not displayed even if those abnormalities occur at power input.

EEPROM (IC11M)
accumulates data necessary

(*6)

for control.

•When the data are not input
accurately.

•When microcomputer cannot
read the data.

The errors 50 to 53 keep
occurring over one and a half
hour.
(the situation, which com­pressor cannot be operated,
continues.)
Overcurrent detection error
occurred before the
compressor is activated.

e56

Refer to “Compressor does not operate” at page.22.

will be displayed again.

Replace
the control
board.

16

When abnormality occurs in
power input, the compressor
is suspended for 10 minutes.
When abnormality occurs in
normal operation, the com­pressor keeps operating.

•Error display starts after it is
regarded as e56.

•Error display continues until

defrosting starts or cooling oper
ation gets back to normal. (Error
display doesn’t disappear by
unplugging and plugging the
power cord.*7)

•Try to restart compressor every 3

minutes.

6-3 BLOCK DIAGRAM OF PRINTED CIRCUIT BOARD

CN3A

CN4D

Control board

CN9D

CN8K

CN7S

Water pump motor

LED for bacteria
removal from water
tank

6-pin connector

6-pin connector8-pin connector

6-pin connector

Ice tray thermistor

Ice making
gear box

M

0

5

4

6
5
4
3
2
1

6
5
4
3
2
1

3
1

898

9

3
1

6
5
4
3
2
1

6
5
4
3
2
1

6
5
4
3
2
1

6
5
4
3
2
1

3 3

5 5

6 6

9 9

6
5
8
7

6
5
8
7

0

5

4

M

Ice making
compartment
thermistor

Water pipe heater

CN2A

9-pin connector

MR-G50J-NZ

Parts outside/inside of Refrigerator

For 325V system

•Compressor
For 230V system

•Defrost heater

•Vegetable compartment heater
1&2

•Rotational heater board

•Divider heater (I/S)

•Water pipe heater

•

Refrigerator compartment room light

•Ice making tray heater

•Setting up temperature, feature, quick mode and eco mode for each
compartment

•Display of self-check

•Outside air thermistor

•Buzzer

Control circuit of refrigerator

•Read/control each compartment tempera­ture (Neuro-fuzzy)

•Control on timers

•Operation control of the parts such as fan
motor or heater, etc. equipped inside/

outside

Operation P.C. board

Control board

Inverter control circuit of compressor

•Inverter control of compressor

•Inverter-drive power module

•Detection of bus-bar voltage

For 12V DC system

•Refrigerator fan motor

•Machine chamber fan motor

•Motor damper

•Ice maker gear box

•Three-way valve

•LED for vegetable compart
ment.

•LED for bacteria removal from

water tank

For 5V DC system

•Freezer compartment thermistor

•Refrigerator compartment thermistor

•Defrost thermistor

•Slide chilled compartment thermistor

•Door switch (For refrigerator com
partment & ice compartment)

•Ice tray thermistor

•Ice making compartment thermistor

•Vegetable compartment thermistor

•Position-specifying switch in ice
maker gear box

•Versa compartment thermistor

6-4 AUTO ICE MAKER
MR-G50J-NZ

(1) Ice making cycle

Water supply

The ice tray is filled with water
from the water tank.

(2) Automatic ice maker circuit

Ice ejection

After the detection lever
checks the amount of ice, the
ice tray is rolled over for ice
ejection.

17

Ice making

Ice tray thermistor watches
and controls the ice making
operation.

Ice stock

Ice is stocked in the ice server.
Ice making capacity is about
100 - 120 cubes a day.
Stock capacity of Ice cubes is
about 100 cubes.

(3) Operation by ice making test

Ice stock detective
lever detects the

Press the switch
for 5 seconds or
more.

(See “• Self check
and error display
method and opera-

amount of ice.

Detective lever once
come down to detection
point then return to the
original position.

tion, 1 Ice making
test operation” at
page 14.)

Ice making test completes
about 20 seconds later.

Ice tray

(Upper freezer compartment)

[Check point of automatic ice maker operation]

*Never touch the automatic ice maker while it is operating.

After the operational test, a popping sound is heard several times because the operation of three-way valve is checked auto­matically. During the operation, do not insert a hand into the automatic ice maker.

The ice tray is
rolled over and the
system is reset.

The ice tray rolls
over once to drop
the ice, then return
to the original posi­tion.

Detection lever

Water pump motor
is operates.

Remove the lid of
the water tank then
check the sounds
of water running.

Completion
When abnormality
occurs, the error code
is displayed on the
panel.
Inspect the abnormal
points by referring to
page 15, 16.

Check here.

(Lower-left part of refrigerator compartment)

(4) Maintenance for water pump and water pipe

Water pump & Light-type bacteria removing filter

1. Pull out the pipe.

Water
tank

Water pipe · Tank holder

1. Pull out water supply
pipe. Wipe the tank
holder with clean cloth.

•Do not let water flow into

the tank holder.

2. Turn the tank
pump to detach.

Tank
pipe

Water pump

Water
supply
pipe

3. Pull out the tank pipe, turn the cap
to remove, and then wash
the propeller with water.

•The propeller is
made of the magnet.
Wash it well with water
so that no alien sub­stance remains on it.

Light-type bacteria removing filter

Tank holder

(5) Troubleshooting for automatic ice-maker

The ice-maker gear box may be defective, cooling may be poor or ice cubes may be full in the server.

1.Check inside of the ice server.

2.Measure the resistance of ice tray thermistor
circuit.

on the ice tray

Water or ice is

3.Check if the temperature of the freezer com­partment is cool enough.

come out from

the tray

The ice does not

(It takes longer to make ice during summer
time or if the door is frequently opened.)

The water saucer may be defective, or the ice tray may get cracked.

4. Check the water pipe between the refrigerator
compartment and freezer compartment for dirt,
and foreign objects.

water

saucer

Water in

5.Check the condition of ice tray.

Tank pipe

Propeller

Cap

2. Separate pieces and wash with water.

packing

Aluminum pipe

4. Remove the light-type bacteria removing filter
and wash it in water.

Normally the filter need not be replaced. However, replace it
in the following condition:

•When the filter is clogged by passing something other than
water through the filter.

•When the filter is broken.

Cover

In such a case, contact the dealer that you purchased this
refrigerator.

5. Put the parts back in the reverse order of disa­ssembly.

3. Reverse steps to replace the pipe.

•Twist the

aluminum
pipe to
replace it.

Side A

Side B

•Ice cubes are not stored flatly

and the amount is detected as
full.

➔Inspection

Water pipe

•Replace the water
pipe.

Be sure that sides A
and B fit flush to

each other.

•Food inside the ice server

•Open circuit (∞') or
short circuit (0')

•Not enough

•Clogging

•Freezing (For freezing, check

the pipe heater resistance.

•Broken or cracked

•Not placed properly

➔Replace the ice tray

thermistor.

➔Poor cooling

➔Clean the water pipe.
➔Defrost

➔Replace the tray.
➔Reinstall it properly.

Trouble with ice-making

in the ice tray

No water or ice

No waterdrops in water saucer

Water in the tank
holder

Chained ice,
Water leaking from
the ice server

6.Disassemble the water pump and check the
inside of the pipe.

•Dirt or foreign objects

➔Repair and explain to

the user for proper
usage.

7.Tank pipe is clogged , has a hole or is not
properly installed.

8.Check the motor coil resistance.

9.Check if there are any dirt or foreign object
which are difficult to remove in the water tank.
Also, check if there is any crack or deformation

•Clogging, disconnecting

•Hole or crack

•Open or short circuit

•Crack or deformation

➔

Clean / Reinstall it properly.

➔Change the tank pipe.
➔Check the water

pump.

➔Change the water

tank.

on the tank.

10.

Check the water pipe for dirt, and foreign
objects. Also, check the water pipe position and
connection.

11.

Check the water pipe (between F.compartment
and R.compartment) for clogging.

12.

Check the water pump operation by the ice­making test.

13.

Water spill at the installation of water tank or more water over the full water level may cause to from

•Clogging, disconnecting

•Hole or crack

➔Clean / Reinstall it

properly.

➔Replace the pipe.

•Clogging ➔Clean / Remove the
dirt.

•Water filling time is longer

than 9 seconds.

➔Replace the control

board.

chained ice.

14.

Measure the water pump coil resistance.

•Open or short circuit ➔Change the water
pump motor.

18

6-5 FLOWCHART OF TROUBLE CRITERION

Weak

Low

High Chilled

Chilled

Middle

Refrigerator

Refrigerator
compartment
Slide chilled
compartment

Cooling Strong

Control board

CN2A

CN4D

CN7S

4-pin
connector

6-pin
connector

Refrigerator compartment room light
Refrigerator compartment
thermistor

Slide chilled compartment
thermistor

Motor damper
(for refrigerator compartment/
slide compartment)

9

0
1
2

9

0
1
2

6
5
4
3
2
1

6
5
4
3
2
1

1
2
3
4

1
2
3
4

4

55

8

1

4

11

8

1

L

M



Jumper to be cut

JP1

1; lowers

1; lowers

1; highers

1; lowers2; lowers

JP2 JP3 JP6JP4

Temperature change

Freezer
compartment

Refrigerator
compartment

Slide chilled
compartment

1; lowers

JP5

Versa
compartment

Ice making
compartment

Slide chilled
compartment

Refrigerator

compartment

Versa
compart­ment

Ice
making
compart­ment

Attach a
magnet bar
here.

Jumper

Operation P.C. board

MR-G50J-NZ

Excessive cooling

Are the temperatures of
refrigerator compart­ment/ set to “Low”?

Yes

Only food around the
air blowing part get
frozen

No

Expose the damper (for refrigerator compartment/ slide com­partment) so that its operation can be visibly checked and
conduct an ice-making test. Does the baffle open/close ?
(Wait 1 minute for self-check).
(See “Self check method and its operation,1 Ice making
test operation” at page 14.)

Normal

Is the motor damper (for refrigerator compartment/ slide

Refrigerator compartment/ Slide chilled compartment
[1]

compartment) covered with frost?

No

Check the refrigerator compartment thermistor
Put refrigerator compartment thermistor into ice water (0:), dis-

connect the 4-pin connector, and measure resistance between
3 (white) and 4 (white).

No

Yes

•Resistance at 0: :approx. 6-7k".

Set the temperatures
to “Low”.

Keep the food away
from the blowing part

No cooling, poor cooling

Are the temperature of
refrigerator compart­ment/ set to “High”?

Yes

Open the refrigerator
compartment door with
a magnet on the door
switch to check that
cold air blows from the
outlet.

The baffle does not operate

Yes

Refrigerator compartment

thermistor abnormal

Yes

No

No

Replace the motor damper (for refrig­erator compartment/ slide chilled
compartment)

❈Motor damper is combined with

control panel assembly.

Repair the frosted part.

Replace the refrigerator
compartment thermistor

Set the temperatures
to “High”.

Proceed to [5] at page

23.

Check the chilled compartment thermistor
Put chilled compartment thermistor into ice water (0:), dis-

connect the 6-pin connector, and measure resistance between
3 (white) and 6 (white).

Cutting jumper wires on operation P.C. board can
change the set temperature of each compartment.
Unscrew the back of operation p.c. board and remove
decoration panel to cut the jumper wires.

•Resistance at 0: :approx. 6-7k".

Chilled compartment

thermistor abnormal

w1

19

Replace the slide chilled

compartment thermistor

Poor cooling

Control board

CN7S

CN4D

M

6-pin connector

Freezer
compartment
thermistor

Motor damper
(for freezer
compartment)


6
5

4
3

2
1


6
5

4
3

2
1

4

4
5
6
3



4
5
6
3



444

Filter board

Control board

Noise filter

CN1

CN2

CN2A CN50G

Compressor

M

Motor
protector

6-pin connector in machine chamber



1



3



3



1



1



3



1



3



1



3




5




1



3




5




5




7




5




7

1
2
3
4
5

1
2
3
4
5

M

1

Is the set temperature of freezer compartment set to “High”?

2

Does cool air come out of air outlet?

Operate the ice-making test at the place where the operation of

3

dampers (Refrigerator compartment and slide compartment ther-

Freezer compartment
[2]

mistor) is visible. Does the baffle open / close? (Wait 1 minute for
self-check).
(See “Serf-check and error display method and operation, 1 Ice
making test operation” at page 14.)

Check freezer compartment thermistor.

4

Yes

Yes

Normal

No

No

The baffles
do not
function.

Normal

Set the temperature to “High”.

Proceed to “The refrigerator fan motor does not work.”

Replace the motor damper (for freezer com­partment ).

ww

Replace the fan grille as well as the motor
damper since they are combined together.

When compressor
operates, LCD indi­cates e41 as a

Exchange
the unit

result of self-check.

Dip freezer compartment thermistor into ice water (0:), and
measure the resistance between terminal 3 (white) and 6
(white) by detaching 6-pin connector at the left-back bottom of
vegetable compartment.

•Resistance at 0: :approx. 6~7k".

Defective thermistor

Replace freezer compartment thermistor

Not cooling at all(In case any error codes doesn’t appear as shown in page 21,22 even though mode switch is pressed for 5 seconds)

Yes

Is refrigerator in the demonstration mode?

No

Does AC 230V run between 1 and 3, termi­nals of CN1 on filter board?

Yes

Does AC 230V run between 3 and 5, termi­nals of CN2 on filter board?

Release the demonstration mode. (See page 10.)

No

Inspect power-supply wiring such as power cord and
breaker etc.

No

Replace the filter board.

Compressor does not operate

Detach each connector CN2A on
control board check the continuity
between terminals 5 and 7

[3]

respectively.
(Check if there is a short or open
circuit in the motor protector.)

Detach connector CN50G on con­trol board and check the resis­tance respectively between termi­nals of 1,3 and 5:approx.9.3"

Check the error display of self­check after turning on and off the
power supply.
wWith all the connectors connected.

Inverter-related parts may be
defective. Conduct ice making
test operation. (see page 21 for
error codes.)

Yes

Continuity detected

Continuity detected

No
continuity

Motor protector (open circuit)
wBy measuring the resistance,

ensure that the circuit is open.

No
continuity

Disconnect 6-pin connector in
machine chamber to check resis­tance between terminals of 1, 2
and 3: approx.9.3"

Measure the resistance of com­pressor’s winding between termi­nals of black, white, and red :
approx.9.3"

Abnormal

Normal

Check connector contact.

Abnormal

Abnormal

Exchange the unit

Normal

Replace the lead wire
assembly (Lead wire of
compressor)

20

Inverter-related indication “Compressor does not operate”

Error

code

e50

e51

Abnormality

Trouble of
inverter circuit

Bus-bar
voltage is
abnormal.

Possible cause Symptom Treatment

•When there is
any trouble in the
circuit which
detects phase
current of com­pressor.

•Power supply
voltage is
abnormal.

•Defective reactor
on the N/F board

Compressor
does not
rotate.

Compressor
does not
rotate.

Replace the control board.

Start

Measure the voltage of

power supply.

Arrange power supply to make the voltage
within 180-280V and conduct the following
checks.

160V or

280V or more

more

Arrange
power sup­ply to obtain
the rated
voltage,
180-280V.

e52

e53

Trouble of
inverter software
reset function

•Abnormal start­up

•Abnormal
synchronization

•Trouble of
overcurrent

detection

•When the inverter
driving software
malfunctions.

•Compressor
motor gets locked.

•Defective circuit
on control board

•Defective contact
of CN50G on
control board

•Defective contact
of machine
chamber 6-pin
connector

Compressor
does not
rotate.

Compressor
does not
rotate.

Does AC230V run
between CN51 ter­minals 1 and 3, on
the control board?
(See page 32.)

Yes Normal

Replace the

control board.

Unplug the power cord and then plug it in 10 minutes.

Check the error code by performing the ice making test operation.

e52

display again.

Replace the control board.

Start

Disconnect 6-pin
connector in
machine cham­ber to check
resistance
between each
terminal of 1, 2
and 3: Are they
approx. 9.3'
(20:)?

Yes

No

*Replace lead wire assembly C.

Check the
connection

No

between filter
board and
control board.

Replace the

filter board.

Explanation to customer

Measure the
resistance of
compressor’s
winding
between each
terminal of 1,
2 and 3: Are
they approx.

9.3' (20:)?
Yes

Abno-

Connect

rmal

them

properly.

No error code display

No

Exchange

the unit

*Is compressor

energized at
startup?

Yes Normal

Exchange

the unit

*If control board is normal, compressor is energized

every 10 minutes.
Compressor vibrates at startup when it is being ener­gized. Touch it with your hand to check.

21

Check the connection of the

No

connector CN50G on the
control board or the machine
chamber 6-pin connector.

Replace the

control board.

Abnormal

Connect them

properly.

Inverter-related indication “Compressor does not operate”

start

Connector CN50G on the
control board is properly
connected?

6-pin relay connector in machine
chamber is properly connected?

The connector of compressor
is properly connected?

Disconnect 6-pin relay
connector in machine
chamber and measure
the resistance
between each terminal
of 1 ,2 and 3 (Pont 1).
Approx.

9.3"(At 20:)?

Is compressor being
energized at startup?

Exchange the unit

Connect properly.

Measure the
resistance of
compressor’s
winding
between each
terminal
(Point 2).
Approx.9.3

"

(At20:)?

Exchange
the unit

Replace the lead wire connected to compressor.

Replace the control board.

Replace it only when error display
keeps blinking even though all the
above mentioned connectors are
properly connected.

Check

No

Yes

Yes

Yes

Yes Yes

Yes

No

No

NoNo

No

Treatment

Compressor

6-pin relay connector in machine chamber

Control board

Point+2 (to measure resistance)

Point+1 (to measure resistance)

For checking the connection
to compressor

For checking the relay
connection

Lead wires connected
to compressor

Error
code

e56

Abnormality

•Defective wiring
continuity

•Trouble of the
control board

Possible cause Symptom Treatment

•Defective connec­tion of connectors
related to com­pressor

(board-side,relay,

comp-side)

•Defective wiring
continuity of the
compressor

•Trouble of control
board

•Trouble of
compressor

(1) or (2)
(1)Compres

sor can
not be
activeted
for more
than 1.5
hours

(2)Overcurr

ent
detection
error
occurred
before
the com­presssor
is
actived.

1.Locate the trouble and deside the treatment

•Decide the treatment by checking the followings.
(1) Defective connector connections.

(board-side,relay,comp-side)

(2) Resistance of compressor’s winding

2.Flowchart of troubleshooting

3.Recheck after treatment

•After any treatment is tried, unplug and plug power cord
again to check if the compressor operates properly.

•If the compressor can operate properly for more than 1
minute after power cord is plugged again, it’s presumed
that the couse of trouble is eliminated.

*If the couse of trouble cannot be eliminated,”e56” will be

displayed again 1 minute later after the power cord is
plugged again.

*If the control board has been replaced,e56 won’t be dis-

played even though the couse of trouble is still not elimi­nated. In such a case,perform the ice making test opera­tion to check what the error is. At the same time, also con­firm that the compressor is operating for more than 3 min­utes and each compartment is getting cooled.

22

Poor defrosting[4]

Control board

CN7S

CN2A

2-pin connector

4-pin connector

9-pin connector

1-pin connector

Thermal fuse

Defrost heater

Defrost thermistor

353

4

5


2

3 3

1 1
1


2


2

4


2

1

949

4

OFF

etc

ON

R-door (right, left): closed
Door of the ice making
compartment : closed

Any one of the doors
are open

Doors

2-Pin connector

Between

and

1

2

1 2

10~50mm

a

Door of vegetable

compartment

Door of freezer

compartment

Left door of refrigerator

comparttment

Door of ice

making

compartment

Door of

versa

compartment

Right door of refrigerator

compartment

c

b

Control board

CN7S

CN4D

8-pin
connector

2-pin
connector

Refrigerator compartment
(right and left)/ Ice making
compartment door switch

Lead Switch board

Refrigerator
fan motor

6-pin
connector

4-pin
connector

M

6
8
5
3


6
8
5
3

1
2
4
3

1
2
4
3

4
3
2
1


4
3
2
1


8
7

434

3

8
7

212

1

1

<Control board>

Compulsory defrosting

Short circuit

CN1

Short-circuit the terminal ➀and ➁of the compulsory

1

defrosting terminals (CN1M) of the filter board to actuate
the compulsory defrosting function and check whether the
defrost heater is working properly. *1

No

2

Check if there is continuity between thermal fuse
and defrost heater.

Yes

Poor cooling

Yes (heats up)

No

Check the following: half-open door,
space between gaskets, the amount
of ice.

Replace the defrost heater and the
thermal fuse.

Check the resistance of the defrost
thermistor.

*1 The compulsory defrosting will

not work when the temperature
of the defrost thermistor is 14:
or more.

1

Plug and unplug the power cord to perform self-check on

Yes

refrigerator fan motor. Is the lamp indicating abnormality?

No

2

Plug and unplug the power cord to check if
machine chamber fan motor is rotating.

Running

3

Check the door switch for continuity.

•Open and close the refrigerator door b several times
and check if the room light will be turned on and off
(Room light should get turned off when the door comes
10mm close to the refrigerator body a.)

•Close the refrigerator compartment door until the light is

Not rotating

Room light is
not turned on
and off.

4

turned off a. Open and close the ice-making-compart­ment door c, and from the space of refrigerator compat-

The refrigerator fan motor does not work
[5]

ment door, check that the room light is turned on and off.

Room light is turned on and off properly.

5

Check if there is continuity in 6-pin fan motor connector in

No continuity

versa compartment.

Continuity detected

Door switch for refrigerator compartment (right and left) and ice making compartment.

Replace refrigerator fan motor.

Note: Refrigerator fan motor is combined

with fan grille.

Check if CN4D connector on control
board is connected properly.
If it is, replace the control board.

Check the continuity by
disconnecting the CN7S
on the control board.
(See figure below.)

Normal

Abnormal

Check if the connector on
the door switch is connect-

Contact failure of
connector.
Connect it proper­ly.

ed properly. If it is, replace
the door switch.

Connect the connectors properly.

Replace refrigerator fan motor.

Note: Refrigerator fan motor is combined

with fan grille.

wIf any one of those doors are open, the switch between

1 and 2,terminals of 2-pin connector, will be OFF)

23

Excessive cooling

Control board

CN7S

CN8K

CN3A

CN2A

4-pin connector

6-pin connector

6-pin connector

2-pin connector

4-pin connector

Vegetable
compartment
heater 1

Vegetable
compartment
heater 2

Refrigerator
compartment
thermistor

Slide chilled compartment thermistor

Outside air
thermistor
TH1

Operation P.C. board

1
2
3
4

1
2
3
4

5 5

1
2
4

1
2
4

4 4

88

1 1

7

7

5 5

6 6

1 1
2 2


3
4


3
4


6
3


6
3



4
3
2
1

4
3
2
1

poor cooling

Is the temperature of
vegetable compartment
set to “Low”?

Yes (Go to 1or 2 )

Check the thermistor, vegetable compartment

1

heater, and control board.

Is one of these error codes indicated when conduct-

Vegetable compartment

ing self-check of operation P.C. board?

[6]

Refrigerator compartment thermistor: e13
Slide chilled compartment thermistor: e14
Vegetable compartment thermistor: e16
Outside air thermistor: e18

No error code is
indicated.

Does vegetable compart­ment have a resistance of
approx. 2.9k" between wire­connected terminal 5(CN2A)
and 7 (CN3A) on control
board (parallel resistance
between vegetable compart­ment heater 1 and 2)?

It may have contact failure of

Yes

connector. Recheck the contact
after the 6-pin or 2-pin connector
is connected.

When outside temperature is 32: or less and compartment temperature is
8: or less, set the temperature of each compartment as follows.

Refrigerator compartment: High
Slide chilled compartment: Chilled
Versa compartment: Soft freezing

Freezer compartment: High
Is there voltage AC230V between connector CN2A5 (Gray) and CN3A 7
(Yellow green) on control board?
Measure the voltage for over 10 seconds.
When an analog tester detects AC 230V, consider the control board normal.
(230V is outputted on every 10 seconds.)

Check if doors are hermetically closed.

Yes

No

Set the temperature to
“Low”.

e13, e14 or e16 is indicated.

0"

or

∞"

Is there a resistance of
approx. 5.9k" between
5 and 6, terminals of 6­pin connector which is
located at the right top
of fan grille?

Is the temperature of
vegetable compartment
set to “High”?

Are the temperatures of

No

(Go to 1 or 2 )

refrigerator compart­ment/ freezer compart­ment set to “Low”?

e18 is indicated.

Is there a short or open cir­cuit in each thermistor and is
the resistance 0" or ∞"?

Yes

Yes

0"

or

∞"

Is there a resis­tance of approx.

5.9k" between 1
and 2, terminals
of 2-pin connector
which is located
at the left-back
bottom of veg­etable compart­ment?

Yes

No

No

Set the temperature to
“High”.

Yes

Set the temperatures to
“Middle” or “High”.

Replace the Filter board.

Yes

Replace the defective
thermistor.

Check the contact of con­nector connecting each

No

thermistor and connector
CN7S on control board. Fix
the incomplete contact.

Replace the vegetable
compartment heater 1.

Note: Vegetable compartment

heater 1 is combined with
fan grille.

0"

or

∞"

Replace the vegetable
compartment heater 2.

Note: Vegetable com

partment heater 2
is combined with
partition V/ F.

Replace the control board.

Check refrigerator / slide chilled compartment is excessively cooled (poorly cooled).

2

Follow the refrigerator / slide chilled compartment flowchart on page 19.

Explain proper usage to customer

OK

24

only applies to versa compartment. Excessive cooling

Control board

CN7S

CN9D

8-pin connector 4-pin connector

6-pin connector

Versa
compartment
thermistor

Ice making
compartment
thermistor

M

Motor damper
(for ice making
compartment/
versa compartment)

3
2

4
1

4

7
5



4

7
5



3
2

4
1


9
8



9
8


6
5
4
3
2
1

6
5
4
3
2
1


1
3


1
3

Refrigerator

compartment

Versa
compart­ment

Ice
making
compart­ment

Attach a
magnet bar
here.

No cooling; poor cooling

Which operation mode is
versa compartment set to?

It is set to “Soft freezing”.

It is set to
“Vegetable •
Refrigerator” or
“Chilled”.

Yes

Only the food around
cool-air outlet is exces­sively cooled.

No

Make the operation of
motor damper (for ice
making compartment/
versa compartment)

Versa compartment/ Ice making compartment

visible, and conduct ice
making test. Check that

[7]

the baffles open and
close.
(Wait one minute for self­check.)
(See “• Self-check and
error display method and
operation, 1 Ice making
test operation” on page

14.)

Normal

Is the motor damper covered with frost?

Not frosted

Is the
temperature
set to “Low”?

Yes

The baffles
do not function

No

Keep food away from
air outlet in storing food.

Disconnect CN9D and measure
the resistance between 1 and
2, and between 3 and 4.
Check that the winding of motor
damper (for ice making compart­ment/ versa compartment) has a
resistance of approx. 415"

It is set to ,
“Vegetable •
Refrigerator” or
“Chilled”.

Set the temper­ature to “Low”.

Is connector CN9D on
control board connected
properly?

Yes

Normal

Frosted

Which operation mode is versa compartment set to?

It is set to “Soft freezing”.

It is set to “Freezer”.

Is the tempera­ture set to “High”.

Yes

Does cool air come out
of air outlet when open­ing the refrigerator­compartment door and
attaching a magnet bar
on the door switch?

No

0"

or

∞"

w1

Yes

Connect the connector
properly.

Is 6-pin connector which is in connector cover
on the back of versa compartment connected
properly?
(6-pin connector is connected to motor damper.
Refer to the figure below.)

Replace the motor damper (for ice making com­partment/ versa compartment)

ww

Replace the fan grille as well as the motor
damper because they are combined together.

No

Set the temperature to “High”.

Check the set temperature in freezer com­partment. Is the temperature set to “High”?

No

No

No

Yes

Repair the frosted part.

Set the temperature to
“High”.

Refer to the section:
“The refrigerator fan
motor does not work”.

Check the versa compartment thermistor.

Dip the versa compartment thermistor into the ice water
(0:) and disconnect 6-pin connector for fan grille at the
back of versa compartment. Measure the resistance
between terminal 3 (white) and 6 (white).

•Resistance at 0:: Approx. 6~7k"

Check the ice making compartment thermistor.

Dip the ice making compartment thermistor into the ice
water (0:) and disconnect 6-pin connector of fan grille
at the back of ice making compartment. Measure the
resistance between terminal 1 (white) and 4 (white).

•Resistance at 0:: Approx. 6~7k"

25

Defective thermistor

Defective thermistor

Replace the versa

compartment thermistor.

Replace the ice making

compartment thermistor.

w1

6-6 TROUBLE CRITERION OF MAIN PARTS

Black

Red

White

1

1

2

2

Contact point

1

1

2

3

4

2 3 4 : Pin No.

IC

IC Power
Power
FG
GND

1 2 3 4 : Pin No.

1

2

3

4ICIC Power

Power
FG
GND

MR-G50J-NZ

Components/

Part Name

Compressor

Check Method and Criterion

Model

Rated input
Starting current
Running current

ETI100E13DAH

45/159 (1620/4800rpm)

W

A

0.03/2.19 (1620/4800rpm)

A

2.0

Parts Mounted

Position

In the machine
chamber at the
rear side of the
frame.

Motor
protector

Refrigerator
fan motor

)

:

or less

Abnormal

(faulty)

Open (∞' )

or

short circuit

(0' )

Measure the resistance
with a tester.

Model

Connected
point

(Black-White)

(White-Red)
(Red-Black)

Open

Close

Normal

Winding

9.3 '

(20

:

MM3-71CCV

100 ±50 : or more

Energize it at 17.0A, 25: for 16 seconds at the longest

61±8

Measure the resistance with a tester. (Ambient temperature : Room temperature)

Normal Abnormal (faulty)

Open circuit (∞' )

Model
Number of pole

Diameter

Less than 1'

UDQM002B3
DC brushless

10

{150 (Mixed flow fan)

Measure the resistance with a tester. (Ambient temperature : Room temperature)

Normal

Between 1 and 4 (GND and IC

Power): About 12 k'

Between 3 and 4 (Power and

IC Power): ∞'

Abnormal

(faulty)

Between 1 and 4
: open circuit (∞' )

Between 3 and 4
:short circuit (0' )

In the machine
chamber at the
rear side of the
frame.

.

In the fan grille
of the freezer
compartment.

Machine
chamber fan
motor

Model
Number of pole

Diameter
Operation method

During compressor operation

UDQM004B3
DC brushless

10

{140 (Extra fan)

Measure the resistance with a tester. (Ambient temperature : Room temperature)

Normal

Between 1 and 4 (GND and IC

Power): About 9 k'

Between 3 and 4 (Power and

IC Power): ∞

'

Abnormal (faulty)

Between 1 and 4
: open circuit (∞' )

Between 3 and 4

:short circuit (0

26

In the machine
chamber at the
rear side of the
frame.

' )

Components/

Red

Yellow

Blue White

Red

Yellow

Blue White

Part Name

Water pump
motor

Check Method and Criterion

Measure the resistance with a tester. (Ambient temperature : Room temperature)

Normal

16' (Approx.)

Abnormal (faulty)

Open (∞' ) or

short circuit

(0' )

Parts Mounted

Position

Under the water
tank holder in
refrigerator com­partment.

Motor damper
for refrigerator
compartment/
slide chilled
compartment

Motor damper
for ice making
compartment/
versa compart­ment

Measure the winding resistance.

Winding

Blue-White

(

Red-Yellow

Measure the winding resistance.

Winding

Blue-White

(

Red-Yellow

In the control
panel for
refrigerator

Normal

415'

)

)

(Approx.)

Normal

415'

(Approx.)

Abnormal (faulty)

Open (∞' ) or

short circuit

(0' )

Abnormal (faulty)

Open (∞' ) or

short circuit

(0' )

compartment.
Connector is at
the left-back bot­tom of refrigera­tor compartment.

In the fan grille
for freezer
compartment.
Connector is at
the back of versa
compartment.

Motor damper
for freezer com­partment

Measure the winding resistance.

Winding

Blue-White

(

Red-Yellow

Red

Yellow

Blue White

In the fan grille
for freezer

Normal

415'

)

(Approx.)

Abnormal (faulty)

Open (∞' ) or

short circuit

(0' )

compartment.
Connector is at
the left-back bot­tom of vegetable
compartment.

27

Components/

Part Name

Check Method and Criterion

Parts Mounted

Position

Defrost heater

Vegetable
compartment
heater 1

Rated input

Operation method

Measure the resistance with a tester. (Ambient temperature : Room temperature)

Measure the resistance with a tester. (Ambient temperature : Room temperature)

W

The heater is energized while defrosting.

(Defrosting is finished when the evaporator is 14± 1.5: or more)

5.9k' (Approx.) Open circuit (∞' )

163

Normal

325'

(Approx.)

Normal

Abnormal (faulty)

Open circuit (∞' )

Abnormal (faulty)

At the drip tray
under the evap­orator of the
freezer
compartment.

In the fan grille
at the back of
vegetable
compartment.

Vegetable
compartment
heater 2

Water pipe
heater

The heater is turned on when vegetable compartment

Operation method

Measure the resistance with a tester. (Ambient temperature : Room temperature)

Operation method

Measure the resistance with a tester. (Ambient temperature : Room temperature)

thermistor has reached a lower temperature than the set
temperature for vegetable compartment.

Normal Abnormal (faulty)

5.9k' (Approx.)

The heater is turned on when vegetable compartment
thermistor has reached a lower temperature than the set
temperature for vegetable compartment.

Normal

Open circuit (∞' )

Abnormal (faulty)

In partition V/F.

Under the water
tank holder.

Operation method

6.6k' (Approx.) Open circuit (∞' )

When ice-making thermistor has reached approx. 10; or
below, the heater is turned on with energizing rate adjust­ed by the set temperature of slide compartment and
freezer compartment.

28

Components/

Part Name

Divider
heater (I/S)

Check Method and Criterion

Measure the resistance with a tester. (Ambient temperature : Room temperature)

Normal Abnormal (faulty)

9.6k' (Approx.) Open circuit (∞' )

While compressor is operating, the heater is turned on.

Operation method

When compressor stops, the heater is suspended for the
first 20 minutes and then reactivated.

Parts Mounted

Position

In partition I/S.

Rotational
heater board

Ice making
tray heater

Measure the resistance with a tester. (Ambient temperature : Room temperature)

Normal Abnormal (faulty)

6.6k' (Approx.) Open circuit (∞' )

While compressor is operating, the heater is turned on.

Operation method

Measure the resistance with a tester. (Ambient temperature : Room temperature)

When compressor stops, the heater is suspended for the
first 20 minutes and then reactivated.

Normal Abnormal (faulty)

4.8k' (Approx.) Open circuit (∞' )

In the rotational
heater board of
refrigerator
compartment.

Lower part
of ice tray

Operation method

During CRYSTAL ICE mode
(The heater is turned on 10 minutes after water is

supplied, until 5~6 hours.)

29

Components/

A 5

A 2

B1COM3B

4

1 2 3 4 5

B A

COM

B A

0

0

5

10

15

20

25

30

35

(k')

10 20 30 (;)-10-20

Thermistor resistance

values against temperature

Outside air thermistor
(In the operation
P.C. board)

Resistance values

Temperature

Inner
thermistor

Refrigerator
compartment

Slide chilled
compartment

Ice making tray
thermistor

Freezer
compartment

Defrosting
Versa

compartment
Ice making

compartment
Vegetable

compartment

Part Name

Check Method and Criterion

Parts Mounted

Position

Thermistor

Measure the resistance with a tester according to the following graph.
(Thermistor resistance values against temperature)

•Resistance measured under the ambient temperature from -50: to +50:

1. 200' to 500k' ·····················Normal

2. Out of the above range·········Abnormal

Thermistor Check Procedure

•Thermistor resistance value will vary
with the change of temperature.

•Take the temperature around the

thermistor, and then measure thermistor

resistance using a tester.
The relation between resistance and
temperature is as shown on the left side.

Troubleshooting with self-check

(1)If the self-check indicates the abnor-

mality of thermistor when the power is
turned on, measure the resistance of the
thermistor.

•If there is a short circuit in the thermis­tor, there may be a defect in the contact
of the connector or the element of the
thermistor.

(2)When the self-check indicates the

abnormality of thermistor a few seconds

after the power is turned on, check the

contact of the connector.

Defrost

thermistor

Evaporator

Ice making
thermistor,
Versa
compartment
thermistor,
Vegetable
compartment
thermistor
and Freezer
compartment
thermistor

In the fan grille
of each
compartments.

Ice making
tray
thermistor

In the ice
making
compartment.

Outside air
thermistor

In the operation
P.C. board.

Three-way
valve

Check the operation of three-way valve
Check the operation by following either (1) or (2) below. When a popping sound is

heard 1 to 25 times, it is considered that the valve is operating normally. The sound
is clearly heard around the back of the product.
(1) Reset the power supply. Check the operation right after this.
(2) Ice making test. Check the operation right after the test is over.

Model NSCE001DC1

Normal Abnormal

54~56' (Gray
[common] A/ A/ B/
B each phase)

In the machine
chamber at the
rear side of the
frame.

Open (∞' ) or

short circuit

(0' )

30

Components/

LED

Use a tester equipped
with a diode range
( ).

LED

Part Name

Check Method and Criterion

Parts Mounted

Position

Vegetable com­partment LED
(12V DC)

•The pointer of the tester equipped with a diode range shakes
when measuring the resistance between 4-pin connector

Normal condition

Timing in

making contact

Abnormal

condition

LED shown in the figure on the right turns orange in the above timing.

Note: LED cannot be replaced individually because it is combined with the fan grille.

No.3(-) and No.4(+).

•Use a tester equipped with a diode range ( ) for
judgement.

Electricity is supllied all the time.

•The pointer of the tester equipped with a diode range does
not shake when measuring the resistance between 4-pin
connector No.3(-) and No.4(+).

•Make sure that the pointer of the tester does not shake even
if the polarities are reversed.

•Resistance: Short-circuited (0

')

In the fan grille.

LED for bacteria
removal from
water tank
(12V DC)

Timing in

making contact

Abnormal

condition

•After water is supplied to the ice tray.

•After the ice level sensor lever detects that ice storage
becomes full.

•While the door is kept open for maximum of 5 minutes.

When the door is opened, LED goes out within 5 minutes.
wMake sure if the connector is securely connected.

Note: LED cannot be replaced individually because

it is embedded in the tank holder.

6-7 TEST POINT DIAGRAM OF FILTER BOARD
MR-G50J-NZ

AC230V

Earth

On the external
surface of the
tank holder.

230V

31

6-8 TEST POINT DIAGRAM OF CONTROL BOARD
MR-G50J-NZ

AC

7
5

3 Defrost
heater
1 Refrigerator

~

230V

}

compartment

CN2A

}

Compressor

}

5 W phase

3 V phase

1 U phase

DC +5V
(Inverter circuit)

}

+

–

DNG
DC280 ~ 330V

}

+

–

DC+12 ~ 20V
(Inverter circuit)

}

+

–

Compulsory
defrosting by
short circuit

DC+5V

–

(Refrige-

rator

}

control

+

circuit)

DC+12

–

~ 13V
(Refrige-

}

+

rator
control
circuit)

11 Rotational heater board

}

3 Water pipe heater

5 Divider heater (I/S)

7 Vegetable compartment heater 1, 2

9

CN9DCN3A

9 LED for bacteria removal from water tank

10

11 Power suplly of three-way valve

12

1 Ice tray heater

CN4D

1

2

3

4

5

67 8

}

}

Electromagnetic three-way valve

Damper for ice making

compartment / versa compartment

14

15

16

}

Damper for freezer

compartment

10

111213

9

4 Machine chamber fan motor (+)

5 Refrigerator fan motor FG signal

6 Machine chamber fan motor / Refrigerator fan motor driver IC powe source

7 Machine chamber fan motor FG signal

8 Fan motor +

1

2 GND

3 GND

CN8K

8 Ice maker (rotation)

}

Damper for refrigerator

compartment / slide compartment

}

14 5V com

1 Reception of operation panel data

2 Power supply to operation panel data

3

4 GND

5 Ice maker position switch

6 Water pump -

7 Ice maker (reverse)

CN7S

10 Ice making tray thermistor

11 Refrigerator compartment thermistor

12

13

6 Vegetable compartment thermistor

7 Versa compartment thermistor

8 Slide chilled compartment thermistor

9 Defrost thermistor

1

2 Vegetable compartment LED

3 Door switch input

4 Freezer compartment thermistor

5 Ice making compartment thermistor

32

NAMES OF THE PARTS7

Height adjustable shelf

Three-way flexishelf

Water tank

Small item case

Free pocket (S)

Bottle pocket (S)

Free egg shelf (S)

Ice making compartment is
applicable to refrigerator and
freezer compartment.

Automatic ice maker
(Ice making compartment)

Vegetable compartment

Freezer compartment

Free
pocket (L)

Two-way
flexishelf

Lid of slide
chilled case

Slide chilled case

Tube stand

Bottle
pocket (L)

Versa compartment

Versa compartment is applicable to freezer, soft freezing,
chilled and refrigerator

●

vegetable

.

Versa compartment is set to refrigerator ● vegetable mode at factory shipping.

Refrigerator compartment

Operation panel

Sliding case

Vegetable
stand

Vegetable case
2L-plastic bottles
can be put into
the case.

Freezing case
(upper)

Freezing case
(lower)

Partition pocket

Alumi-num tray

Versa case

Sound proof
mat

❈Reduces the
sound of ice
dropping into
the storage
corner.
Do not remove
the mat.

Ice tray

❈Can not be
removed.

V-LED lamp

Water supply port cap

Water tank lid

Water supply pump,
Light-type bacteria
removing filter

Water supply pipe

Pipe

Water tank (app. 1.2L)

Ice storage bin

Ice server

MODE
button

SELECTION
button

Fast cooling button

ECO button

:

Min

REF

VEG

FZR

QCK

REF
CHILL
SOFTF

F Z R

ICE

(

STOP

)

DEO

L M H

VEG

QCK ICE

REG ICE

ECO

CRL ICE

VR

D

L

M
H

MR-G50J-NZ

33

8

Small item case

Vertical partition

Ceiling of slide chilled compartment

Slide chilled case lid

Small item case
(with free egg
shelf (S))

Slide chilled case

DISASSEMBLY INSTRUCTIONS

MR-G50J-NZ

Plug out before work!!
Check the automatic ice-maker pressing ice making stop switch.
In assembling & disassembling parts seven kinds of screws and rivets are used. Do not mistake to use them.

A

B

C

D

E

F

G

4✕12

Stainless steel

4✕12 (Black)

With metal washer

4✕16 (White)

With plastic washer

Specified screw

OPERATING PROCEDURE

1. Elect cover ➔ Control board

(1)Remove 5 screws fixing the elect cover and the rivet

upper rear side of the refrigerator. (See photo 1)

E on the

Control board

(2)Disconnect the connector to remove the control board.

Caution on assembly

Firmly connect the lead wires and the connector. Ensure the
wires are not pinched.

2. Parts inside the refrigerator compartment: Vertical partition

➔ Right rail of the slide compartment ➔ Left rail of the
slide compartment ➔ Room light cover ➔ Control panel
(Upper/ Lower), Duct R (Upper/ Lower)

(1)Remove the three way flexishelf, slide chilled case, and height

adjustable shelf, two way flexishelf from the refrigerator
compartment.

Photo 1

Photo 2

Rivet

Control panel

Rivet

PHOTOS

Rivet E

5 fixing screws

Right rail of the

slide compartment

5✕16

Stainless steel

Elect cover

Vertical partition

1Remove the small item case and the slide chilled case.
2Pull out the ceiling by unhooking the front catches on both

sides.

3Remove the slide chilled case lid.
4Remove the vertical partition.

Right rail of the slide compartment

(2)Slide the right rail out toward you. (See photo 2 )

Left rail of the slide compartment

(3)Remove screw G (one screws),and slide the left rail out toward

you. (See photo 3)

Room light cover

1Push up the lower catch, and pull the room light cover toward

you.

2Detach two upper catches to take out the cover.

(See photo 4)

34

Photo 3

Photo 4

Screw G

Left rail of the slide

compartment

Control panel

Catches

Room light

Room light cover

Catch

OPERATING PROCEDURE

PHOTOS

Duct R (upper/ lower)Control panel (upper/ lower)

(4)Remove rivet E, and pull out the mirror hinge on the lower left

of the control panel to remove the connector. (See photo 5)

(5)Remove rivet F (two rivets) in the upper left and right side,

screw A (two screws) in the lower left and right side, and rivet

F (two rivets) in the lower. left and right side.
Detach catches (seven places).
(See photo 5)

(6)Detach catches (six places) on control panel (upper/ lower) and

then duct R (upper/ lower).
Control panel can be divided into the upper and lower part by

w

detaching catches (three places) on control panel (upper/ lower)

Control panel assembly

(The assembly consists of the following: Control panel [upper/

lower], motor damper for refrigerator compartment / slide chilled

compartment, refrigerator compartment thermistor, slide chilled

compartment thermistor, room light socket, refrigerator compart-

ment room light, and duct R [upper/ lower]).

Caution on assembly

To prevent poor contact of connectors, connect them properly.
Fix the control panel by inserting the lower catches (two places)

into the floor of refrigerator compartment.

3. Parts inside the ice making compartment, versa compart-

ment, vegetable compartment, and freezer compartment ➔
Partition I/ S ➔ Partition I/ S/ V ➔ Cover (IM) ➔ Automatic
Ice maker assembly ➔ Cover (lower) ➔ Partition V/ F ➔
Connector cover (right/ left) ➔ Fan grille ➔ Defrost heater,
Drip tray, DEF thermistor

(1)Remove interior parts out of ice making compartment,

versa compartment, vegetable compartment, and freezer

compartment.

(2)To detach them, pull out the doors of ice making

compartment, versa compartment, vegetable

compartment, and freezer compartment.

Partition I/ S

(3)Remove rivet E (one rivet), partition cover, and a connector.

Remove screw C (two screws) at the front side of refrigerator

and four rollers to pull out the partition.
(See photo 6)

Caution on assembly

Push up the lead wires so that they will not rub partition I/ S.

Partition I/ S/ V

(4)Remove screw A (two screws) at the front of refrigerator.

Remove screw A (one screw each) and screw D (one screw

each) at the right and left side of inner wall.
Then lift up the partition.
(See photo 7)

Photo 5

Catch

Rivet F

Screw A

Photo 6

Photo 7

Photo 8

Rivet F

Rivet E

Screws C

Rollers

Screw D

Catch

Mirror hinge

Catches

Partition I/ S

Partition I/ S/ V

Tank holder

Partition I/ S/ V

Tank holder

Catch

Rivet F

Catch

Rivet F

Screw A

Control

panel

(lower)

Rivet E

Partition cover

Rollers

Screws A

Screws A

Screw D

Catch (Automatic Ice
maker assembly)

Automatic Ice
maker assembly

Cover (IM)

(5)Remove 2 rivets E and 3 catches in order to detach the cover.

(See photo 8)

Automatic ice maker assembly

(6)Pressing a catch upward, and pull Automatic Ice maker

assembly to the right side. (See photo 8)

35

Cover

Rivet E

Catches

(Cover)

Cover (IM)

Rivet E

OPERATING PROCEDURE PHOTOS

Catch

Defrost
heater

Evaporator
support

Cover (lower)

(7)Remove rivet E (one rivet) to detach the cover (See photo 10)

Partition V/ F

(8)Remove screw A (four screws) on inner wall and screw A (two

screws) at the front.
Detach three connectors and lift up the partition. (See photo 9)

Connector cover (right/ left)

(9)To detach connector cover, remove rivet E (two rivets each)

and catches (two places).
(See photo 10)

(10)Detach the connector.

Fan grille

(11)To detach fan grille, remove screw B (two screws) of right and

left side and remove upper catches (three places).

Fan grille consists of the following: motor dampers (for ice-

w

making compartment/ versa compartment, and freezer com­partment), refrigerator fan motor, fan, thermal fuse, vegetable
compartment heater 1, four thermistors, vegetable compart
ment LED.

(See photo 10)

Defrost heater , Drip tray

(12)To pull out defrost heater, remove the tape fixing lead wires

and push up the catches of evaporator support.
Remove heater roof out of defrost heater.
To detach drip tray, remove aluminum tape first.
(See figure 1)

Photo 9

Fan grille

Connector

Screws A

Partition V/ F

Screws A

Photo 10

Catches

Rivet E

Rivet E

Connector cover (left)

Cover (lower)

Rivet E

(Fan grille consists of the following: motor dampers (for ice
making compartment / versa compartment, and freezer
compartment), refrigerator fan motor, fan, thermal fuse, veg­etable compartment heater 1 four thermistors, vegetable
compartment LED).

Figure 1

Screws B

Connector cover (right)

Fan grille

Defrost thermistor (DEF thermistor)

(13)Cut the binder and disconnect the connector to remove the

DEF thermistor and the thermal fuse. (See photo 11)

Caution on assembly

Attach defrost heater in place and loosen the lead wires in
order to prevent water from entering the glass tube.
Attach the drip tray securely to the lower parts.
Attach the DEF thermistor in place. (If they are attached out of
place, thermal characteristics will go wrong.)
Attach the lead wires to the fixture.

Photo 11

DEF thermistor

Evaporator

Defrost heater

36

OPERATING PROCEDURE PHOTOS

Tank holder

4. Parts inside the refrigerator compartment ➔ Left rail of the

slide compartment ➔ Parts inside the ice making compart­ment ➔ Ice making compartment door ➔ Tank holder ➔
Door switch

(1)Remove the parts inside the refrigerator compartment.

(See procedure [2])

(2)Remove the left rail of the slide compartment.

(See procedure [2])

(3)Remove the parts inside the ice making compartment.

(See procedure [3])

(4)Remove the ice making compartment door.

Tank holder

(5)Remove a screw on the side of the refrigerator compartment.
(6)Remove label and screw A (two screws). Pull the tank window.
(7)Loosen screw A (three screws) halfway on the side of the ice

making compartment. Put a screwdriver on the head of each
screw and top the bottom side of the holder softly to detach it.
(See photo 12)

(8)Lift up the tank holder from the refrigerator compartment to

remove it.

Note:

1Put the lead wires in place so that they do not get caught in

water supply channel.

2Put the tank holder in place so that the water does not leak from

it.

Photo 12

Tank holder

Door switch

Label

Tank window

Screw A

Figure 2

Door switch

(9)Insert a minus screwdriver between switch and body to remove

the door switch.

5. Parts inside the versa compartment ➔ Ceiling of versa

compartment

(1)Take out interior parts of versa compartment.
(2)Lift up and pull out the versa-compartment door.

Ceiling of versa compartment

(3)To detach the ceiling, remove rivet F (three rivets) and pull

down the ceiling.
(See photo 13)

Caution on assembly

1Be sure that all the parts are fitted securely in place.

Photo 13

Rivet F

Rivet F

Ceiling of versa compartment

Rivet F

37

OPERATING PROCEDURE PHOTOS

Connector

Operation
panel

6. Operation panel

How to remove

(1)Slide the operation panel in the direction of the arrows, unit it

stops. (See figure 3.)

(2)Pull out the operation panel as shown in a figure 4.

(See figure 4.)

Note :

1 Please pull it out carefully because it is still wired to the body.

Figure 3

(3)Take out the panel by detaching the connector of lead wires from

the body.
(See figure 5.)

Note :

1 If the horizontal slide is hard to remove with hands, put plate

on the right edge of the panel (please put protective object such

as tapes on the area of contact on the door panel and the opera-

tion panel), and gently tap it in the sliding direction.
(See figure 3.)

7. Rotational heater board

(1)Remove four fixing screws to remove the rotational heater

board. (See photo 14)

(2)Remove a screw on the wiring cover and disconnect the

connector in the cover. (See photo 14)

Figure 4

Figure 5

Photo 14

Screws

Wiring cover

Caution on assembly

When raising the rotational heater board, replace the rotational
heater board as it was. if the refrigerator door is closed with the
board raised, the rotational heater board may hit against the
left door of refrigerator and be damaged.
Though heater preventing dewdrop may make rotational heater
board hot, it does not affect food inside.
Refer to right figure when installing the rotational heater board.

(See figure 6)

●Loosen the fixing screw and adjust a vertical (upper and lower)

motion.

●After assembling, make sure that the rotational heater board fits

the guide properly and works properly.

38

Rotational

heater board

Screws

Figure 6

Rotational heater
board

Left door of
refrigerator
compartment

Guide

3i2mm

(4)mm

(715)

OPERATING PROCEDURE

: This mark shows welded point.

w

w

w

w

w

w
w
w

w

w

w

w

Compressor

Heat radiation
pipe of flat face
flange

Heat radiation
pipe of left side

Machine chamber
fan motor

Charge pipe
(Low pressor side)

Charge pipe
(High pressor side)

Dryer

Three-way valve

Keep the clearance
between each parts
for 10 to 15mm

WW

Heat radiation
pipe at back side

Heat radiation
pipe at right side

W

Bell mouth

Attach U washer as the figure shown below.

Piping connection of three-way valve

Exit
(right)
[1.6✕[0.63

Exit
(left)
[1.8✕[0.67

To capillary tube

To capillary tube

8. Compressor cover ➔ machine chamber fan motor

(1)Remove 7 screws for compressor cover at the back of the refrigerator.

Machine chamber fan motor

(2)Remove screw one fizing screw of bellmouth and connector. Then pull out the bellmouth.
(3)Pull out the fan from the fan motor.
(4)Remove one lid-fixing screws to take out the fan motor.

Figure 7
W Note 1: Form the pipe so that it can be slanted toward the upper right. (Approx. 15 degrees).

39

Door adjustment

B

A

A

B

A

B

right 0.5 [09]
right 1.0 [11]
left 0.5 [13]
left 1.0 [15]

Marking

LH RH

I dentifying roller sets (Marking)

right 0.5 [10]
right 1.0 [12]
left 0.5 [14]
left 1.0 [16]

Marking

LH RH
Roller set A (0.5mm to the right)
Roller set B (0.5mm to the right)
Roller set C (0.5mm to the right)
Roller set D (0.5mm to the right)

09
11
13
15

10
12
14
16

<Adjusting refrigerator compartment doors>

• Common elements
First, check the installation condition.

1 If the adjustment bolt is not in contact with the floor, lower the bolt, and adjust it so that the caster is slightly above the floor.
2 When the refrigerator is installed in the corner of the room, the bolt of the refrigerator may sink into the floor and cause the

refrigerator to tilt. It is recommended to make adjustments by objects like boards beforehand.

3 When the refrigerator bolt is sunk into the floor, and it can be confirmed visually, prevent sinking by using objects like

boards.

Note : The refrigerator weighs about 100kg, and is held by four bolts. How far each bolt sinks into the floor depends on

factors such as floor pillars. Change in balance due to position of stored food (such as large or small amount of food
stored in the door pockets) may also affect sinking.

<Adjusting ice making compartment and versa compartment doors>

Adjusting doors horizontally

Problem

A>B (More space in outer side) 1
Or
A<B (More space in inner side)

1 Place spacer set under the

outer roller of the tilted door
(ice making compartment door
in the above illustration) to
adjust position.

2 Place spacer

Solution

set under the inner roller of the
tilted door
(ice making compartment door
in the above illustration) to
adjust position.

Adjusting vertical space between doors

Too much space Not enough space

A>B (Too much space between
the ice making compartment and
versa compartment doors.)
Misaligned versa compartment
door 3
Misaligned ice making
compartment door 4

3 Replace roller set of the right

and left versa compartment
doors.

a To adjust about 0.5mm

Replace with roller set C.

b To make large adjustment

Replace with roller set D.

4 Replace lower roller set of the

ice making compartment door.

c To adjust about 0.5mm

Replace with roller set A.

d To make large adjustment

Replace with roller set B.

A<B (Small space between the ice
making compartment and versa
compartment doors.)Misaligned
versa compartment door 5
Misaligned ice making
compartment door 6

3 Place roller set of the right and

left versa compartment doors.

a To adjust about 0.5mm

Replace with roller set A.

b To make large adjustment

Replace with roller set B.

6 Replace lower roller set of the

ice making compartment door.

c To adjust about 0.5mm

Replace with roller set C.

d To make large adjustment

Replace with roller set D.

40

9

No.

1
2
3
4
5
6
7
8

9
10
11
12
13
14
15
16
17
18
19

20
21
22
23
24
25
26
27
28
29

Elect cover
Control board
Refrigerator compartment thermistor
Room light socket
Refrigerator compartment room light
Chilled compartment thermistor
Plug cord assembly
Versa compartment thermistor
Ice making compartment thermistor
Defrost thermistor
Vegetable compartment thermistor
Freezer compartment thermistor
Gear box
Motor (Water tank)
Ice-tray thermistor
Bell mouth
Machine chamber fan motor
Filter board
Operation P.C. board
Door switch
Heater roof
Defrost heater
Drip tray
Motor protector
Terminal cover
Fan
Bush

Lead wire assembly
Lead wire assembly

NZ
SS

1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
2
1
1

Part No. Part name

Spec.

or

Drawing No.

MR-G50J

T1W 01W 328
T1W 13W 339
T1W 06W 312
T1W 06W 366
T1W 01W 360
M20 KA3 313
T1W 13W 395
M20 KA2 313
M20 KA7 313
M20 KA0 311
T1W 06W 316
M20 KA1 313
T1W 01W 469
M20 KA0 327
T1W 01W 316
M20 KW0 656
M20 KA0 325
T1W 02W 339
T1W 06W 338
T1W 06W 388
T1W 06W 537
T1W 13W 392
M20 KG0 536
M20 KA0 340
M20 KL0 341
M20 KW1 321
M20 KW0 329
T1W 01W 304
M20 KG0 304

240V,10W

In the automatic ice maker

UDQM004B3
With operation P.C. board box

230V,163W / Deodorizing function not equipped
Equipped with fixing tape

MM3-71CCV

Lead wire of compressor
Lead wire of fan motor in machine room

RoHS

G
G
G
G
G
G
G
G
G
G
G
G
G
G
G
G
G
G
G
G
G
G
G
G
G
G
G
G
G

Abbreviation

R
C

F

I

S

Refrigerator compartment
Chilled compartment
Freezer compartment
Ice making compartment
Versa compartment

RoHS PARTS LIST

ELECTRICAL PARTS
MR-G50J-SS-NZ

Thermistor (R)

Thermistor (C)

Thermistor (S)
Thermistor (I)

Thermistor (DEF)

Thermistor (V)
Thermistor (F)

Ice-tray thermistor

1
2

3
4

5
6
7
8

9

10

11

12

13
14
15
16

17

18

19

20
21

22
23

24
25

26

27

Motor protector

Bush

Part numbers that are circled are not shown in the figures.

41

DOOR PARTS

Abbreviation

R/ L

I

V

Refrigerator compartment (Left)
Ice making compartment
Vegetable compartment

F

R/ R

S

Freezer compartment
Refrigerator compartment (Right)
Versa compartment

MR-G50J-SS-NZ

1

Hinge
assembly
(Left/ Upper)

9

Hinge
assembly
(Right/ Upper)

10

2

3

4

Door
closer
(Left)

5

Door stopper
(Left)

6

7

11

12

14

13

15

16

17

18

Door closer
(Right)

Door stopper
(Right)

23
24

25

26

27

8

19

20
21

22

42

28

29

30

31

Part numbers that are circled are not shown in the figures.

Spec.

No.

G

1

G

2

G

3

G

4

G

5

G

6

G

7

G

8

G

9

G

10

G

11

G

12

G

13

G

14

G

15

G

16

G

17

G

18

G

19

G

20

G

21

G

22

G

23

G

24

G

25

G

26

G

27

G

28

G

29

G

30

G

31

G

32

G

33

G

34

W1: Without gasket, Operation panel, Operation P.C. board, Rotational heater board.

Part No.

RoHS

T1W 01W 701
T1W 13W 009
T1W 07W 852
M20 KL1 026
M20 KW4 747
T1W 13W 004
T1W 13W 002
T1W 13W 001
M20 KA1 701
T1W 13W 000
M20 KE5 026
M20 KW8 745
T1W 13W 006
M20 KG0 120
M20 KG1 110
M20 KG0 124
M20 KG0 139
M20 KL0 930
M20 KG0 113
M20 KG1 155
M20 KG0 151
M20 KG0 157
T1W 06W 050
M20 KG2 110
M20 KG0 118
M20 KG0 123
M20 KG0 114
M20 KG1 154
M20 KG0 112
M20 KG0 112
M20 KG0 108
M20 KL0 607
M20 KW0 717
T1W 06W 715

Part name

Drawing No.
Hinge assembly (Left/ Upper)
Outer door panel (R/L)
Operation panel
Door closer (Left)
Door stopper (Left)
Outer door panel (I)
Outer door panel (V)
Outer door panel (F)
Hinge assembly (Right/ Upper)
Outer door panel (R/R)
Door closer (Right)
Door stopper (Right)
Outer door panel (S)
Free pocket (L)
Door gasket (R/R)
Bottle pocket (L)
Tube stand
Frame screw
Door gasket (S)
Frame (S)
Frame (V)
Frame (F)
Rotational heater board
Door gasket (R/L)
Free pocket (M)
Bottle pocket (S)
Door gasket (I)
Frame (I)
Door gasket (V)
Door gasket (F)
Packing (F)
Spring (Rotational heater board)
Upper hinge assembly (Rotational heater board)
Lower hinge assembly (Rotational heater board)

With hinge assembly (Left/ Upper)

Without gasket
Without gasket
Without gasket

Without gasket, With hinge assembly (Right/ Upper)

Without gasket

6 pieces included

For interior board of freezer compartment door

With spring

or

, w1

MR-G50J

NZ

SS

1
1
1
1
1
1
1
1
1
1
1
1
1
2
1
1
1
4
1
1
1
1
1
1
2
1
1
1
1
1
1
1
1
1

43

BODY PARTS
MR-G50J-SS-NZ

1

2

16

17
18

5

19
20

Guide

3

4
5

6

Water pipe

5
7

Hinge assembly
(Left/ Lower)

21
22
23

24

25
26

27
28

29
30

31
32
33
34

35

36

Tank pipe

Filter cover
Light-type

bacteria
removing
filter
Water supply
port cap

Water pump

Hinge
assembly
(Right/ Lower)

Roller
assembly

Bearing

8
9

10
11
12

13

Screw label

14
15

44

13
37

38

Screw label

Abbreviation

R.V.

I.M.
I.S.

V.F.

I.S.V

Between refrigerator compartment and vegetable compartment
Ice maker
Between ice making compartment and versa compartment
Between vegetable compartment and freezer compartment
Between ice making compartment, versa compartment and vegetable compartment

Part numbers that are circled are not shown in the figures.

No. Part No.

RoHS

1
2
3
4
5
6
7
8

9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43

T1W 06W 858

G

M20 KL0 705

G

T1W 06W 863

G

T1W 06W 663

G

T1W 06W 808

G

M20 KA0 525

G

M20 KA1 702

G

T1W 01W 521

G

T1W 01W 350

G

M20 KL1 442

G

T1W 06W 652

G

M20 KA0 794

G

M20 KW0 709

G

M20 KA0 795

G

M20 KA0 460

G

M20 KW0 707

G

M20 KW1 835

G

M20 KK4 470

G

M20 KL0 864

G

M20 KL0 802

G

M20 KL0 503

G

M20 KG0 802

G

M20 KW3 442

G

M20 KW0 526

G

M20 KL0 531

G

M20 KW0 519

G

M20 KA0 702

G

M20 KL0 527

G

M20 KL0 106

G

M20 KL0 520

G

T1W 01W 524

G

M20 KL2 442

G

T1W 01W 802

G

M20 KL0 803

G

M20 KG1 846

G

M20 KG1 798

G

T1W 06W 846

G

T1W 07W 730

G

M20 KG0 712

G

M20 KW0 805

G

M20 KL0 442

G

T1W 06W 107

G

M20 KG0 798

G

Part name

Control panel assembly
Hinge cover (Left)
Left rail of slide compartment
Fan grille
Connector cover (Fan grille)
Water pipe
Hinge assembly (Left/ Lower)
Water tank holder
Automatic ice maker assembly
Cover I.M. assembly
Compressor cover
Caster set
Screw label

assembly

Caster
Adjustment bolt
Hinge cover (Right)

Guide
Room light cover
Right rail of slide compartment
Vertical partition
Tank pipe
Ceiling of versa compartment

Filter cover

Light-type bacteria removing filter
Water supply port cap
Water pump
Hinge assembly (Right/ Lower)
Water tank cover
Packing (Water tank cover)
Water tank assembly
Tank window

Partition cover
Partition (I.S)

Roller assembly
Partition (I.S.V)
Bearing
Partition (V.F)
Toe grille
Spacer set
Rivet
Thermistor (I) cover
Packing (Upper)
Bearing F/V

Spec.

or

Drawing No.

W1

W2

Three types; One cover each

W3
With ice making tray heater

Combined with photocatalyst

W4

With heater board
A set for both sides

With vegetable compartment heater 2

For difference adjustment of the I-door and the S-door

In the automatic ice maker
Compartment side (Upper part)

MR-G50J

NZ
SS

1
1
1
1
1
1
1
1
1
1
1
2
2
2
2
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
2
1
4
1
1
2
1
1
1
4

W1: With motor damper for refrigerator compartment / slide chilled compartment, refrigerator compartment thermistor, slide chilled

compartment thermistor, room light socket, refrigerator compartment room light, and duct R (upper/ lower).

W2: With thermal fuse, motor dampers for ice making compartment / versa compartment, and freezer compartment / refrigerator

fan motor, fan, vegetable compartment heater 1, thermistors (for versa compartment, ice making compartment, vegetable
compartment, and freezer compartment), LED for vegetable compartment.

W3: With water pump motor, water pipe and LED for bacteria removal from water tank.
W4:

With tank pipe, filter cover, light-type bacteria removing filter, water pump, water supply port cap, water tank cover and packing (water tank cover).

45

ACCESSORY AND UNIT PARTS

Abbreviation

F
V

S

Freezer compartment
Vegetable compartment

Versa compartment

No.

1
2
3
4
5
6
7
8

9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31

Two-way flexishelf (Rear)
Two-way flexishelf (Front)
Height adjustable shelf
Three-way flexishelf (Rear)
Three-way flexishelf (Front)

Small item case
Free egg shelf (S)

Ice mat
Ice storage bin
Soundproof mat

Ice server
Slide case (V)

Freezing case (Upper)
Freezing case (Lower)
Ceiling of slide compartment
Slide chilled case
Slide chilled case lid
Aluminum tray (S)

Versa case
Vegetable stand

Vegetable case
Drain pan
Evaporator assembly
Compressor

U washer
Rubber mount
Dryer pipe set

Valve coil
Three-way valve

Radiator plate assembly
Packing (Radiator plate)

SS

1
1
1
1
1
2
2
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1

Part No.

Part name

Spec.

or

Drawing No.

MR-G50J

NZ

M20 KG0 427
M20 KG1 428
M20 KG1 423
M20 KG1 427
M20 KG1 428
M20 KL0 122
M20 KL1 115
M20 KG0 483
M20 KG0 467
M20 KG1 483
M20 KW0 462
M20 KG1 406
M20 KG1 414
M20 KG1 451
M20 KG0 456
M20 KG0 411
M20 KG0 418
M20 KG0 437
M20 KG0 444
M20 KG0 404
T1W 06W 405
M20 KW0 435
M20 JJ3 995
T91 511 300
M20 EH2 736
M20 GA0 797
M20 HA0 980
M20 JA0 944
M20 JA0 945
M20 HK7 940
M20 H31 939

With valve coil

3 washers

ETI100E13DAH

Blue (upper mat)
White (lower mat)

Operation manual provided, 4 pieces included

These part
numbers will
be informed
later.

RoHS

G
G
G
G
G
G
G
G
G
G
G
G
G
G
G
G
G
G
G
G
G
G
G
G
G
G
G
G
G
G
G

MR-G50J-SS-NZ

1
2
3

4

15
16

5
6

18
19

7
8
9

10

11

20
21

12
13

14

22

17

Aluminum
tray(S)

23

24
25

U washer

26

Rubber mount

27

28

Valve coil

29

Three-way
valve

30

Part numbers that are circled are not shown in the figures.

46

47

HEAD OFFICE: TOKYO BLDG., 2-7-3,MARUNOUCHI,CHIYODA-KU, TOKYO100-8310,JAPAN

CCopyright 2006 MITSUBISHI ELECTRIC ENGINEERING CO.,LTD.
Distributed in Jul. 2006. No. OA090 7
Made in Japan

New publication, effective Jul. 2006
Specifications subject to change without notice.