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

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.

▼Slide rollers

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)

110

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

187 (FREOL S10)

kg kg

g g g

V,Hz

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.

SPECIFICATIONS

MR-G50J-NZ

A A

°C

Sec.

°C °C

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

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

-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

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

SHUT

– – –

-0.1 – – – – –

-23.1

Slide chilled Ice making

ELECTRICAL PARTS SPECIFICATIONS

MR-G50J-NZ

ICE MAKING TRAY HEATER

Vegetable compartment heater 2

Vegetable compartment heater 1

CONTROL BOARD, N/F BOARD

INVERTER

GRAY

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

WHITEWHITE

GRAY

GRAYRED

REDRED

BLUE

BLACK

WHITE

RED

YELLOW

VIOLET

GRAY

R-COMPARTMENT ROOM LIGHT

YELLOW

VIOLET

MOTOR PROTECTOR

L N

PLUG

Vegetable compartment LED board

BLACK

WATER PUMP

VIOLET

WHITE

THREE-WAY

VALVE

WHITE

RED

LIGHT BROWN

SKY BLUE

VERSA.THERMISTOR

I.THERMISTOR

YELLOW

GREEN

BLUE

LIGHT

GREEN

PINK

BRIGHT

YELLOW

BROWN

F.THERMISTOR

C.THERMISTOR

R.THERMISTOR

WHITE

ORANGE

WHITE

ICE-TRAY THERMISTOR

WHITE

SKY BLUE

WHITE

V.THERMISTOR

WHITE

DEF.THERMISTOR

YELLOW

BLUE

ORANGE

BLACK

VIOLET

YELLOW

RED

BLUE

SKY BLUE

RED

WHITE

SKY BLUE

BLACK

GRAY

PINK

LIGHT BROWN

YELLOW GREEN

BROWN

RED

YELLOW

WHITE

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

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)

MR-G50J-NZ

SSR4 SSR3SSR5

FUSE1

X1SSR1

SSR2

AC230V

Power Plug

50Hz

N/F BOARD

CN1

CN12

2 3 4

4321

Electric box

1 2 3

5 6

2 3 4

4 3 12

4 23

87652 3 41

6541 2 3

7 8

MOTOR DAMPER

F.THERMISTOR

THERMAL FUSE (73:)

CN9D

4 3 2 1

57 692110

1112

2 3 4

4 3 12 16151413 1112 10 9 78

6 5

CN4D

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

6542 3

652 3 4

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

7 13

CN50G

3 1

CN2A

57 3 1

CN3A

8 7 5 4 13

CN7S

1110

432

1 2

DEF.THERMISTOR

2 3 41

Machine chamber fan motor

MOTOR PROTECTOR

Machine chamber compartment

COMPRESSOR (View from rear left side)

3 2

1 2 3 4 65

VEGETABLE COMPARTMENT HEATER 2

DEFROST HEATER

Three-way

valve

1 2 3

Brown

Blue

Violet

Gray

INVERTER

White

Black

Red

Yellow

Blue

Black

Light brown

Blue

Brown

Yellow

Yellow green

Pink

Gray

Pink

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

Yellow

White

Red

Orange

White White

Yellow Gray Orange

White

White White

Light brown

Red

Sky blue

Sky blue Sky blue

Blue

Light green

Sky blue

Yellow

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

Red

Yellow

White

Brown

Violet

Blue

Gray

Red

Sky blue

Ice compartment

Red

Violet

Light green

Orange

Black

Violet

Light green

Orange

Black

Violet

Gray

Black

White

Red

Yellow

Violet

Black

Orange

Violet

Yellow

Blue

White

Red

Light green

Orange

Black

Pink

Red Blue

WhiteWhite Red

Sky blue

Black

White

Black Violet

Red

Pink

Yellow

Violet

Bright yellow

Yellow

White

Red

Blue

Blue Red White Yellow

Gray

Yellow

White

Gray

White

Red

Sky blue

Light brown

Yellow green

Blue

Pink

Yellow

Violet

Brown

White

Yellow

White

Red

Blue

Yellow

White

Red

Blue

Red

Vegetable compartment heater 1

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

Red

White

Gray

Yellow

White

Brown

Sky blue

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. )

2500

100

930

1809

1100

745

REQUIRED SPACE FOR INSTALLATION

699

247

338

324

318

313

400

351

392

440

337

363

329

262

249

534 600

782214361

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

284

456

699

124

162

124

142

312

284

168

101

123

124

720

607

307

332 176

1072

(Display)

642

654

374

655

196

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

REFRIGERANT CIRCUIT

MR-G50J-NZ

Muffler

Evaporator

Suction pipe

Charge pipe (Low pressure side)

{6.35

Charge pipe (High pressure side)

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)

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

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.

●Each compartment can be operated with energy saved.

Convenient function

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).

Child lock

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

Ice making stop

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

ICE(STOP)

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.

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

(2) Demonstration mode for shop display

M H

R E F

F Z R

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.

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.

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.

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 .

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.

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.

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.

Setting

●Press for about five seconds.

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.

Release

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

(5) Thermistor temperature check mode

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.

-28

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

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.

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.

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

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

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.

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

OFF

Display of Displayed Not displayed

Normal

High speed

(7) Damper Operation Mode

(1)Damper to be set up

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

TEMP

Ice making compartment

Freezer compartment

Slide chilled compartment

Refrigerator compartment

REF

FZR

CHILL

Versa compartment

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

damper is shown on the panel.

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.

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;

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.

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

Set to

and then set to 00.

Not available

Set to 00and then set to .

Set to .

(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.

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.

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

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.

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.)

6-2 FLOWCHART OF SELF-CHECK

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.

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?

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

Is error displayed?

Was more than one error

displayed during repair?

Yes

NoYes

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.)

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.

Was the error which was

displayed at the service-call received

was turned on displayed?

Was treatment performed?

Perform error history mode.

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 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.

(2) Timing in self-check

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 .

” 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 03

e 10

LCD

Self-check

(*5) Communication error of operation panel

Communication error of inverter

Trouble of model judgement

Trouble of ice making tray thermistor

Trouble of freezer com-

partment thermistor

Trouble of defrost

thermistor Trouble of

refrigerator

thermistor

Trouble of chilled compart-

ment thermistor

Trouble of versa compartment thermistor

Trouble of vegetable compart-

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