Mitsubishi Electric MR-B46Z-W-C, MR-B46Z-P-C Service Manual

CONTENTS

1. SPECIFICATIONS ••••••••••••••••••••••••••••••••••••••••••••••••••••••••••2

2. WIRING DIAGRAM ••••••••••••••••••••••••••••••••••••••••••••••••••••••••4

3. OUTLINES AND DIMENSIONS •••••••••••••••••••••••••••••••••••••••••6

4. REFRIGERANT CIRCUIT ••••••••••••••••••••••••••••••••••••••••••••••••7

5. TROUBLESHOOTING•••••••••••••••••••••••••••••••••••••••••••••••••••••8 5-1 FUNCTION OF OPERATION PANEL •••••••••••••••••••••••••••••8 5-2 FLOWCHART OF SELF-CHECK •••••••••••••••••••••••••••••••• 23 5-3 BLOCK DIAGRAM OF PRINTED CIRCUIT BOARD •••••••• 27 5-4 AUTO ICE-MAKER ••••••••••••••••••••••••••••••••••••••••••••••••• 27 5-5 FLOWCHART OF TROUBLE CRITERION •••••••••••••••••••• 31 5-6 TROUBLE CRITERION OF MAIN PARTS •••••••••••••••••••••••• 39 5-7 TEST POINT DIAGRAM OF CONTROL BOARD •••••••••••• 44 5-8

TROUBLESHOOTING FOR SUPERCOOL FREEZING OPERATION

•••• 45

6. NAMES OF THE PARTS ••••••••••••••••••••••••••••••••••••••••••••••• 49

7. DISASSEMBLY INSTRUCTIONS ••••••••••••••••••••••••••••••••••••• 50

NOTE:

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

PARTS CATALOG (OAB162)

C ••••••Taiwan

Model name indication (Inside this door)

SERVICE MANUAL

No. OAH162

Models

MR-B46Z-W-C MR-B46Z-P-C

SPECIFICATIONS

110V, 60 Hz

455

1821 × 600 × 699

104

110

Polyester resin coated steel

ABS resin

Foamed polyurethane (Cyclopentane)

Forced air convection

Fin and tube type

Cabinet, sides, back, front flange and ceiling

Automatic heater defrost

Automatic drainage, Forced evaporation method

Automatic control

LED

183(FREOL S5HFP)

V,Hz

Unit

Shipping

Weight

Accessories

Evaporator

Condenser

Defrost system

Drain

Temperature control system

Refrigerator compartment interior light

Power supply

Total capacity

Dimensions (H × W × 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)

Glass shelf

Two-way flexishelf (Front)

Two-way flexishelf (Back)

Upper case cover

Upper case

Lower case

Water tank (with leadcleaning filter)

Adjustable pocket (Large)

Adjustable pocket (Middle)

Adjustable pocket (Small)

Egg shelf

Bottle pocket

Ice storage box

Soundproof mat

Ice server

Ice tray

Versa compartment case

Aluminum tray (Versa compartment case)

Freezer case (Upper)

Freezer case (Lower)

Vegetable case (Upper)

Vegetable case (Lower)

Adjustable support cover

2 pcs.

1 pc.

2 pcs.

1 pc.

1.6 × 0.7 × 2720

MR-B46Z-C

OAH162

ELECTRICAL PARTS SPECIFICATIONS MR-B46Z-C

Temperature control

Model

NTC thermistor

Freezer Refrigerator Chilled Versa Ice making Vegetable Chilled Vegetable

Compressor Motor damper Heater Heater

Dial position

ON OFF OPEN SHUT OPEN SHUT OPEN SHUT OPEN SHUT OPEN SHUT OFF ON OFF ON

HI °C −20.8 −23.5 1.9 0.7 1.8 0.6 – – – – 9.0 7.7 −2.5 −3.7 5.8 4.5 MID °C −18.4 −21.1 4.8 3.5 – – – – – – 10.0 8.7 – – 6.7 5.4 LOW °C −14.3 −17.1 7.7 6.4 – – – – – – 11.1 9.7 – – 7.7 6.4 LOW (Soft freezing)

°C––––––−5.3 −6.4–––––––– MID (Soft freezing) °C ––––––−6.4 −7.7–––––––– HI (Soft freezing) °C ––––––−8.3 −9.5–––––––– LOW (FREEZER) °C ––––––−15.1 −16.5 –––––––– MID (FREEZER) °C ––––––−19.7 −21.2 –––––––– HI (FREEZER) °C ––––––−23.4 −24.9 –––––––– ICE MAKING °C ––––––––−17.1 −19.9 –––––– ICE MAKING STOP

°C––––––––−17.1 −19.9 ––––––

ELECTRICAL PARTS SPECIFICATIONS MR-B46Z-C

Compressor

Model TKA91E23DAH Power supply 110V, 60 Hz Rated input W 33.7 (1620 rpm) Starting current A 4 (Current limiter) Running current A 0.78 (1620 rpm) Winding resistance (A.T. 20 ºC)

12.4 Ω

Motor protector

Model MM3-71CCV or KA-122-LATL00 Ambient temperature

ºC 25 Time Sec. 16 or less Current A 17

Defrosting

control

Defrosting timer

Model Control board Speciﬁ cation Microcomputer

Freezer compartment

Defrost ﬁ nish ºC Thermistor 14 ± 1.5 Thermal fuse ºC 70 ± 2 Defrost heater-2 81 Ω (110 V,150 W)

Deodorizing function of defrost heater

Not equipped

Defrost heater-1 110 V, 81 W

Fan motor

Refrigerator

Model 12539JH-12L-BU-F2 Type DC brushless motor Input W 4.2 Revolution rpm 2300 Number of poles 4 P

Machine chamber

Model 4715JL04WS16G51 Input W 1.44 Revolution rpm 1450 Number of poles 4 P

Heater (Rating)

Water pipe heater 110 V - 4.0 W Water tank heater 110 V - 3.0 W

Vegetable compartment heater

110 V - 6.0 W

Duct heater 110 V - 6.0 W Drain pipe heater 110 V - 4.0 W Chilled heater 110 V - 6.0 W

OAH162

GRAY

VIOLET

BLACK

PINK

RED

BLUE

GRAY

BLACK

SKY BLUE

BROWN

TEMP. CONTROL BOARD (ON DISPLAY PANEL)

ICE GEAR BOX

RED

WHITE

WHITE/RED

YELLOW

SKY BLUE

BLUE

BLACK

WHITE

BLUE

DRAIN PIPE HEATER

GRAY

REACTOR

WHITE

RED

GRAY

WHITE

GRAY

WHITE

WATER TANK HEATER

ORANGE

LED BOARD IN

VEGETABLE ROOM

( WHEN THE DOORS ARE CLOSED.)

PINK

DOOR SW. ( FOR V-COMPARTMENT)

SKY BLUE

LIGHT BROWN

ICE TRAY DETECTION SWITCH

LIGHT BROWN

SKY BLUE

BLUE

DOOR SW. ( FOR ICE COMPARTMENT)

SKY BLUE

YELLOW

DOOR SW. ( FOR VERSA COMPARTMENT)

SKY BLUE

LIGHT BROWN

DOOR SW.( R-COMPARTMENT)

SKY BLUE

DOOR SW.( F-COMPARTMENT)

SKY BLUE

WHITE/RED

YELLOW GREEN

WHITE

BROWN

RED

WATER PUMP

BROWN

VIOLET

WHITE

RED

FAN MOTOR (FOR COMPRESSOR)

BROWN

LIGHT GREEN

WHITE

BLACK

ORANGE

YELLOW

FAN MOTOR

RED

VIOLET

BROWN

YELLOW

WHITE

BLACK

BRIGHT YELLOW

YELLOW

LED BOARD IN REFRIGERATOR ROOM

WHITE/RED

WHITE/BLUE

BROWN

GRAY

THERMAL FUSE (73 Û&)

WHITE VIOLET WHITE

WHITE

BLUE

DEFROST HEATER 2

DEFROST HEATER 1

BLUE

BLACK

RED

PINK

BLUE

COMPENSATIONAL HEATER FOR CHILLED CASE

BLUE

WATER PIPE HEATER

COMPENSATIONAL HEATER FOR VEGETABLE ROOM

BLUE

LIGHT GREEN

GRAY

BLUE

GRAY

DUCT HEATER

GRAY

YELLOW

GRAY

RED

WHITE

BLACK

VIOLET

GRAY

MOTOR PROTECTOR

YELLOW VIOLET

PLUG

CONTROL BOARD

INVERTER

F1: 10A FUSE ON THE BOARD

SKY BLUE

WHITE

C.THERMISTOR

I.THERMISTOR

V.THERMISTOR

S.THERMISTOR

DEF.THERMISTOR

F.THERMISTOR

R.THERMISTOR

ORANGE

LIGHT GREEN

YELLOW

BRIGHT YELLOW

WHITE

PINK

BLUE

LIGHT BROWN

SKY BLUE

WHITE

BLUE

YELLOW

RED

WHITE/RED

WHITE

BLUE

YELLOW

RED

WHITE/RED

I./C. MOTOR DAMPER

R MOTOR DAMPER

WHITE

BLUE

YELLOW

RED

WHITE/RED

S./V. MOTOR DAMPER

BLACK

RED

GRAY

YELLOW

RED

WHITE

BLACK

SKY BLUE

I. THERMOPILE

WHITE

t°t

t°t°t°t°t

( SKELETON WIRING DIAGRAM )

The wiring diagram in the dashed line is the same as the one attached to the products.

Although the following parts are called in different names here, they are identical with the parts shown in the service manual.

C.THERMISTOR (Chilled thermistor) I.THERMISTOR (Ice making compartment thermistor) V.THERMISTOR (Vegetable compartment thermistor) S.THERMISTOR (Versa compartment thermistor) DEF.THERMISTOR (Defrost thermistor) F.THERMISTOR (Freezer compartment thermistor) R.THERMISTOR (Refrigerator compartment thermistor) TEMP. CONTROL BOARD (ON DISPLAY PANEL): (Operation P.C. board) COMPENSATIONAL HEATER FOR VEGETABLE ROOM: (Vegetable compartment heater) COMPENSATIONAL HEATER FOR CHILLED CASE: (Chilled heater) LED BOARD IN VEGETABLE ROOM: (Vegetable compartment LED) LED BOARD IN REFRIGERATOR ROOM: (Interior LED) DOOR SW. (R-COMPARTMENT): Door switch (for refrigerator compartment) DOOR SW. (F-COMPARTMENT): Door switch (for freezer compartment) DOOR SW. (FOR V-COMPARTMENT): Door switch (for vegetable compartment) DOOR SW. (FOR ICE COMPARTMENT): Door switch (for ice making compartment) DOOR SW. (FOR VERSA COMPARTMENT): Door switch (for versa compartment) FAN MOTOR (FOR COMPRESSOR): (BOX FAN) S./V.MOTOR DAMPER: Motor damper (for versa and vegetable compartment) R.MOTOR DAMPER: Motor damper (for refrigerator compartment) I.THERMOPILE: Ice tray thermopile I./C.MOTOR DAMPER: Motor damper (for ice making compartment and chilled) WATER PUMP: Water supply pump DEFROST HEATER 1: Defrost heater-1 DEFROST HEATER 2: Defrost heater-2

WIRING DIAGRAM

MR-B46Z-C

OAH162

SKY BLUE

WHITE/RED

YELLOW GREEN

ORANGE

PINK

LIGHT

BROWN

LIGHT

BROWN

LIGHT

GREEN

WHITE

BRIGHT YELLOW

YELLOW

BROWN

BLACK

BLUE

WHITE/BLUE

WHITE/RED

LIGHT BROWN

LIGHT GREEN

WHITE

YELLOW

BROWN

RED

BLACK

BLUE

WHITE

REACTOR

VIOLET

PINK

YELLOW

BLUE

LIGHT

GREEN

RED

WHITE

BLACK

WHITE

BLACK

PLUG

ELECT BOX

CONTROL BOARD

BLACK

VIOLET

SKY BLUE

WHITE

RED

GRAY

TEMP. CONTROL BOARD

(ON DISPLAY PANEL)

SKY BLUE

BLACK

RED

GRAY

VIOLET

WHITE

SKY BLUE

GRAY

PINK

BLUE

BROWN

WHITE

REFRIGERATOR

COMPARTMENT DOOR

REFRIGERATOR COMPARTMENT

LIGHT

BROWN

SKY BLUE

GRAY

PINK

WHITE

BLUE

YELLOW

GREEN

BROWN

BLUE

GRAY

ORANGE

WHITE

RED

BLUE

R.THERMISTOR

CHILLED HEATER

PIPE HEATER

TANK HEATER

WATER PUMP MOTOR

YELLOW

WHITE

RED

BLUE

R MOTOR DAMPER

I/C MOTOR DAMPER

YELLOW WHITE RED BLUE

I.THERMISTOR

BLUE

RED WHITE WHITE

YELLOW

WHITE

BLUE RED SKY BLUE WHITE/RED YELLOW BRIGHT YELLOW

C.THERMISTOR

ICE GEAR BOX

ICE TRAY DETECTION SWICH

BLUE

RED

WHITE

YELLOW

WHITE

BLUE

RED

SKY BLUE

WHITE/RED

YELLOW

ORANGE

WHITE

WHITE/RED

SKY BLUE

BLUE

LIGHT BROWN

SKY BLUE

WHITE

RED

YELLOW

BLUE

LIGHT BROWN

BLACK

RED

SKY BLUE

YELLOW

WHITE

GRAY

SKY BLUE

RED

THERMOPILE

REFRIGERATOR LED

WHITE/BLUE WHITE/RED

ICE/VARSA

COMPARTMENT DOOR

ICE COMPARTMENT

YELLOW

SKY BLUE

BULE

LIGHT BROWN

R./I./S.COMPARTMENT DOOR SWITCH

F.COMPARTMENT DOOR SWITCH

WHITE/RED SKY BLUE

FREEZER COMPARTMENT

FREEZER

COMPARTMENT DOOR

DEF.THERMISTOR

DEFROST HEATER 1

DEFROST HEATER 2

WHITE WHITE

BLUE BLUE

WHITE

BLACK

PINK

SKY BLUE

WHITE WHITE

RED

SKY BLUE

VERSA COMPARTMENT

S/V MOTOR DAMPER

S.THERMISTOR

YELLOW WHITE RED BLUE

BLUE

RED WHITE WHITE

YELLOW

WHITE

BLUE RED SKY BLUE WHITE/RED YELLOW BRIGHT YELLOW

ICE COMPARTMENT

DUCT HEATER

THERMAL FUSE (73ºC)

F.THERMISTOR

FAN MOTOR (FREEZER)

GRAY

WHITE WHITE WHITE

YELLOW

BLUE

VIOLET SKY BLUE

GRAY

BRIGHT YELLOW

BLACK

YELLOW

VIOLET

YELLOW

BLACK

WHITE

RED

PINK SKY BLUE

V.COMPARTMENT DOOR SWITCH

VEGETABLE

COMPARTMENT DOOR

VEGETABLE COMPARTMENT

V.THERMISTOR

WHITE

VIOLET

LIGHT GREEN

GRAY

BLUE

SKY BLUE YELLOW BROWN

VIOLET

WHITE WHITE

WHITE

V.H EAT ER

MACHINE CHAMBER COMPARTMENT

BROWN

LIGHT

GREEN

BLACK

ORANGE

RED

WHITE

BLACK

YELLOW

FAN MOTOR (COMPRESSOR)

RED

WHITE

BLACK

GRAY

VIOLET

RED

WHITE

BLACK

VIOLET

YELLOW

WHITE

RED

BLACK

COMPRESSOR (VIEW FROM REAR LEFT SIDE)

MOTOR

PROTECTOR

DRAIN PIPE HEATER

GRAY GRAY

GRAY RED

ORANGE

GRAY

LED BOARD IN VEGETABLE ROOM

CN4ACN2A

5V 15

29 25

23 21312 10 8 2 20 10

16214311 9 7 6 5 4

24 2223 21 19417 16

851113 79

MS 3~

CN3A

2628 18 13

2224

CN9S

18 12

CN50G

CN5D

CN1A

2630

23 546

612345

12 12

1 2 3 4 5 6

165432

123456

4321

1 2

1 2 3 4 5 6

1 2 3 4

4321

54321

4 5

113

448

( ACTUAL WIRING DIAGRAM )

( When the doors are closed. )

V.THERMISTOR (Vegetable compartment thermistor) DEF.THERMISTOR (Defrost thermistor) R.THERMISTOR (Refrigerator compartment thermistor) V.HEATER (Vegetable compartment heater) LED BOARD IN VEGETABLE ROOM: Vegetable compartment LED REFRIGERATOR LED: Interior LED R.MOTOR DAMPER (Motor damper for refrigerator compartment) S/V.MOTOR DAMPER (Motor damper for versa compartment and vegetable compartment) I./C.MOTOR DAMPER (Motor damper for ice making compartment and chilled) WATER PUMP MOTOR: Water supply pump motor TANK HEATER (Water tank heater) DEFROST HEATER 1: Defrost heater-1 DEFROST HEATER 2: Defrost heater-2

C.THERMISTOR (Chilled thermistor) I.THERMISTOR (Ice making compartment thermistor) S.THERMISTOR (Versa compartment thermistor) F.THERMISTOR (Freezer compartment thermistor) TEMP. CONTROL BOARD (ON DISPLAY PANEL): (Operation P.C. board) R./I./S. COMPARTMENT DOOR SWITCH: Door switch (for refrigerator compartment, ice compartment and versa compartment) F.COMPARTMENT DOOR SWITCH: Door switch (for freezer compartment) V.COMPARTMENT DOOR SWITCH: Door switch (for vegetable compartment) FAN MOTOR (COMPRESSOR): (BOX FAN) FAN MOTOR (FREEZER): (Refrigerator fan motor) I.THERMOPILE: Ice maker thermopile

MR-B46Z-C

OAH162

(Pitch between the front wheels)

(Pitch between the rear wheels)

(Including the adjustable support cover)

(Excluding the adjustable support cover)

(Max.)

(Min.)

(Max.)

(Min.)

(Max.)

(Min.)

(Max.)

(Min.)

(Max.)

(Min.)

(Max.)

(Min.)

(Display)

(Cabinet)

OUTLINES AND DIMENSIONS

R : Refrigerator compartment

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

DOOR DIMENSION

Unit: mm

MR-B46Z-C

R I SFV

Height 839 207 207 324 367

Width 600 284 310 600 600

REQUIRED SPACE FOR INSTALLATION

Distance between the refrigerator body and the wall to open the door to 90 degrees

(Including the adjustable support cover)

100

7.5

1,726

2,240

1,821

974

708

699

1,270

600

411

OAH162

REFRIGERANT CIRCUIT

MR-B46Z-C

Back-side condenser

Left-hand side condenser

Right-hand side condenser

Charge pipe (Low pressure side) ø 6.35

Charge pipe (High pressure side) ø 4

Dryer #150

Muffler

Cabinet pipe

Evaporator

Suction pipe

Capillary tube ø 1.6 x ø 0.70 x 2720

Compressor

OAH162

TROUBLESHOOTING

5-1 FUNCTION OF OPERATION PANEL MR-B46Z-C (1) Function of normal operation

Icon Display

Operation

Compartment

Function General description Time restriction

•Supercool chilling

•Supercool chilling stores and preserves meat or ﬁ sh for a long time at a temperature lower than the refrigerator compartment or upper case without freezing them.

•No restriction

•Quick ice making

•Cooling in the ice making compartment is given priority, and ice is made rapidly.

•About 10 hours or

•Ice making has been completed 10 times.

•Supercool freezing

•Food is supercooled and moisture in the food is frozen while its particles are maintained under the supercooling phenomenon.

*This function is available when the versa compart-

ment is set to soft freezing.

•About 8 hours

•Hot freezing

•After the button is pressed, it cools rapidly until the heat of the food is dissipated then the supercool freezing control is performed.

*This function is available when the versa compart-

ment is set to soft freezing.

•About 9 hours

•Room select button

•Detailed settings (existing setting operation) can be performed.

•

The display will return to the operation panel screen if there is no operation for about 30 seconds.

* To initialize the settings, touch for 10 seconds. The settings will become as follows.

• Rapid ice, Rapid cool, Fast cooling (Quick ice making), Supercool Freezing, Power Save Mode … Canceled

• Refrigerator compartment, vegetable compartment, freezer compartment … set to

"Middle"

Touching

will cause the operable icons to light up.

To save power, all displays other than

are usually turned off (it turns

off if there is no operation for about 30 seconds).

When setting or cancelling settings (or

cancelling in the middle), touch one of

these.

Touch an icon to display its setting details.

The refrigerator's ECO level is

indicated with the number of marks.

ECO GUIDE

Touch to go to compartment selection;

To uc h

to go to various settings.

The display will return to the operation panel screen if there is no operation for about 30 seconds.

Detail Setting

Example:

When setting the

refrigerator compartment to "M"

The operation panel employs the touch screen which is operated by touching the screen with your finger.

* The operation panel or your finger is wet or dirty. * The operation panel is touched with a gloved finger or a finger with a bandage. *

The operation panel is touched with a sharp-pointed instrument.

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touch it again. Touching the screen again without pause may result in false detection. Touching on the screen strongly does not enhance the detection sensitivity.

7KHUHVSRQVHRIRSHUDWLRQSDQHOGHSHQGVRQWKHDPELHQWWHPSHUDWXUHDQGKXPLGLW\SK\VLFDOFRQGLWLRQ

of the user, and operating conditions of the electric appliances around the refrigerator.



The operation panel may not work properly in the following cases.

* During fast cooling, the compartment is cooled

more powerfully by adjusting the rotational speed of the compressor and the refrigerator fan.

OAH162

(2) Demonstration mode for shop display

Setting

Within 1 minute after power is turned on, touch , , and simultaneously for 5 seconds.

When the setting is complete, 2 short beeps sound and is lit. Demonstration mode is not available when the temperature of freezer compartment is –7°C or lower.

Panel operation mode during demonstration mode

During the demonstration mode, is continuously lit.

Manual mode: By touching the icons, display on the operation panel changes as it is normally operated. Auto mode: Panel display automatically changes. When any icon is touched, the panel operation switches to the manual mode. When no icon is touched for 10 seconds after the operation panel turns off, it switches to the auto mode.

Release

1) Open the ice making compartment door during demonstration mode, and leave it open.

2) Touch to light up the icons.

3) Touch

, , and simultaneously for 5 seconds. In about 5 seconds, 2 short beeps sound and is turned off.

Make sure that the room display and the temperature adjustment display on the operation panel do not light up alternately

a minute after the above 3 steps are performed.

Note: Follow the procedure above to release demonstration mode as it cannot be released by simply turning on/off the power supply.

(3) Ice making test/Self-check

Setting

Touch for 5 seconds.

Operation and its display

While the automatic ice making test is performed, " ", " ", and " " blink on display.

When something is faulty, the error code is indicated.

Release

The test automatically finishes in 10 minutes.

(4) Temperature adjustment for lower case (when supercool chilling is set)

Outline

The lower case in the slide cases can be set to only when it is set to supercool chilling. When the food is frozen, set it in the ambient temperature of 5 degrees or less.

Setting

1) Touch to light up the icon.

2) Repeatedly touch

to light up . (When it does not light up, supercool chilling ( ) has been released.)

3) Touch

to light up

Release

It is almost the same as the setting procedure. Turn off the light of in procedure 3) above.

OAH162

(5) Fine adjustment of temperature

(Fine adjustment of temperature is available for refrigerator compartment, the freezer compartment and the

versa compartment. )

Setting the Temperature Fine Adjustment Mode

Touch

to light up icons.

Touch

and select the compartment

you would like to set to temperature ¿ ne adjustment mode.

Touch for at least 5 seconds (until the

buzzer sounds).

The refrigerator compartment, freezer compartment, and versa compartment can all be set with a single operation.

To Cancel

The same operation as above.

If the setting is reset, it will be cancelled.

Performing the Temperature Fine Adjustment

Touch

to light up icons.

Touch

to select the compartment to perform

temperature ¿ ne adjustment.

Repeatedly touch to perform temperature ¿ ne

adjustment.

The temperature can be set to 19 different levels for the refrigerator compartment and freezer compartment, while it can be set to 24 different levels for the versa compartment (5 levels when set to Soft-Freezing and 19 different levels for Freezing).

When temperature ¿ ne adjustment mode is set, the compartment display blinks about every 10 seconds.

To Control the Temperature More Precisely

(Temperature Fine Adjustment Mode)

Display Example: When the refrigerator compartment is set to Temperature Setting 5.

“ ” blinks about every 10 seconds

“ ” blinks

The versa compartment can be consecutively set to the Soft-Freezing setting

and the Freezing Setting.

Temperature

setting

Temperature

setting

Refrigerator Compartment / Freezer Compartment / Versa Compartment (Freezer Setting)

Versa Compartment (Soft-Freezing Setting)

* represents a blinking display.

OAH162

(6) Service Diagnostics Function

1) Outline

• The chart below shows the outline of service diagnostics function.

• “Service diagnostics function entry” needs to be set in order to perform each check mode.

• After the service diagnostics function entry, Touch

to select the serial number for the check mode to be performed.

Press

for 3 seconds to start the selected check mode.

•

blinks while service diagnostics function is performed.

• When one of the check modes is in operation, the other modes cannot be set. The mode in operation needs to be cancelled

before setting another mode.

• After one of the check modes starts, the mode continues operating even if the door gets closed.

(Open the door when releasing the check mode.)

• Refer to the next sections about the operation procedure and the display of each check mode.

• In order to release “service diagnostics function entry,” follow the same procedure as that for setting operation during

“service diagnostics function entry” or each check mode.

Touch

to light up the icons.

1. Enter the service diagnostics function. (Service diagnostics function entry)

Setting/releasing method Display

Door Operation Blinking

Open the ice

making compart-

ment door.

Touch

and simultaneously for 3

seconds.

2. Select the check mode.

Selecting method Display

Door Operation

Any of the following/blinking

Blinking

Open the ice

making compart-

ment door.

Touch

Each touch of changes the blinking indicator(s) between , , and .

Each combination of

, , and

indicates the serial number for each check mode.

The service diagnostics function entry starts from the serial number 1, blinking of

No. Mode

Compressor rotational speed change mode

…The rotational speed of the compressor can be changed. The box fan can be switched on and off.

Damper operation mode

…Each damper can be opened and closed. Refrigerator fan

can be switched on and off.

Thermistor temperature check mode

…

The detected temperature of each thermistor can be checked.

Error history display mode

…The error occurred in the past can be checked.

Set temperature adjustment mode

…The set temperature and the energization rate in each compartment can be adjusted.

6 - 8

The serial numbers from 6 to 8 can be selected, but do not set the mode to any of them. Those modes are for factory use only.

Selecting method Display

Door Operation Any of the following/lit Blinking

Open the ice

making compart-

ment door.

Touch for 3 seconds.

The indicators of the serial number (

)for the selected check mode stop blinking and remain lit.

3. Set the check mode.

OAH162

2) Compressor rotational speed change mode

Setting

With the ice making compartment door open, touch and simultaneously for 3 seconds until 2 short beeps sound.

blinks.

With the ice making compartment door open. Touch to select blinking .

With the ice making compartment door open, touch for 3 seconds until 2 short beeps sound.

The compressor rotational speed change mode has started. The mode continues operating even if the door is closed.

The compressor rotational speed change mode is not available during the demonstration mode, the thermistor temperature

check mode, the set temperature adjustment mode, the error history display mode, or when the child lock is enabled.

Display during the compressor rotational speed change mode

During compressor rotational speed change mode, blinks and is lit.

Display of rotational speed

• The ones place and tens place of the compressor rotational speed is displayed separately.

• One of the values (8, 4, 2, and 1) is assigned to each indicator of both tens place and ones place on the display. The sum of the values corresponding to the lit indicators is the compressor rotational speed.

Rotational speed change mode

Tens place of the compressor

rotational speed

Display

Corresponding

values

Ones place of the compressor

rotational speed

Display

Corresponding

values

e.g.) Compressor rotational speed 56 rps, Box fan ON.

“ ” Lit Tens place of the compressor rotational speed

Ones place of the compressor rotational speed

Box fan ON/OFF

Blinking

Maximum rotational speed of compressor, Level 9 or Level 10.

“ ” Lit

Box fan ON

Blinking

Tens place "5" (=4+1)

Ones place "6" (=4+2)

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Switching the maximum rotational speed of the compressor between Level 9 and Level 10

During this mode, the maximum rotational speed of the compressor can be switched between level 9 and level 10 by

touching

for 3 seconds.

The maximum rotational speed of the compressor is represented by

Maximum rotational speed of compressor Display of

Level 9 Lit

Level 10 Not lit

While the maximum rotational speed of the compressor is set to Level 9, the rotational speed cannot be changed to Level 10 by following the method described in “ Changing the rotational speed”.

When high load is applied to the refrigerator such as in summer, setting the maximum rotational speed to Level 9 may not

obtain adequate cooling.

The maximum rotational speed of the compressor that was set to Level 9 will remain the same even after this mode is released

. The maximum rotational speed of the compressor will be memorized in the control board. So, if the control board is replaced, the set maximum rotational speed will be reset to Level 10.

Release

With the ice making compartment door open, touch and simultaneously for 3 seconds until 2 short beeps sound. The operation panel returns to the normal temperature display.

The function is automatically released in 1 hour.

Although unplugging and plugging the power code can release this function, it is recommended to follow the procedure above for protection of the compressor. * The set maximum rotational speed of the compressor will remain the same even after the power is turned off.

Changing the rotational speed

After setting this mode, rotational speed of the compressor changes every time is touched.

The ones place and tens place of the rotational speed (rps) is displayed separately.

(Basically the compressor starts operation at level 10, however, it may be different depending on models, or as a result of

specification change.)

Rotational speed can be changed only when the compressor is in operation. While the compressor stops, rotational speed is

not displayed and the touching operation of

is disabled. When the compressor stops, unplug the power code, and wait for

several minutes, then plug it again.

Operation sound may increase in the process of changing rotational speed, but that is not dysfunction. Check the sound

level when rotational speed is stabilized.

Switching ON/OFF the box fan motor

During this mode, touching turns on the box fan motor and touching turns it off.

Box fan

The ON/OFF state is represented by .

OFF

Lit

Not lit

Level 1 Level 2 Level 3 Level 4 Level 5

Normal

Level 6 Level 7 Level 8 Level 9

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

Normal

Low speed

High speed

Level 6 Level 7 Level 8 Level 9

Level 10

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3) Damper Operation Mode

Setting

With the ice making compartment door open, touch and simultaneously for 3 seconds until 2 short beeps sound.

blinks.

With the ice making compartment door open, touch to select the blinking .

With the ice making compartment door open, touch for 3 seconds until 2 short beeps sound.

The damper operation mode has started. This mode continues operating even if the door gets closed.

The damper operation mode is not available during the demonstration mode, the thermistor temperature check mode, the compressor rotational speed change mode, the temperature adjustment mode, the error history display mode, or when the child lock is enabled.

Display during the damper operation mode

During damper operation mode, blinks and is lit.

Control state display of each damper

b) State of damper

on the left represents the current state and on the right represents the next state of the damper operation. Both buttons indicate that the damper is open when they are lit, and they indicate that the damper is closed when they are

not lit.

a) Damper serial number

The indicators which are normally used for setting

the versa compartment correspond to the values representing the damper type.

Each serial number is assigned to each compartment

(thermistor), which is used in thermistor temperature mode and set temperature adjustment mode besides damper operation mode.

The values (8, 4, 2, and 1) are assigned to each indicator.

The sum of the values corresponding to the lit indicators is the damper serial number.

Display Corresponding values

Serial number Assigned compartment Damper operation mode

1 Refrigerator compartment 2 Chilled 3 Ice making compartment 4 Versa compartment 5 Vegetable compartment 6 Freezer compartment 7 Defrosting 8 Ice tray 9 Outside air

10 Deodorization

Versa compartment

thermopile 12 Defrosting-2 13 Ceiling R

/ : SW operation is effective/ineffective

Chilled: For lower case

Present Next

c) ON/OFF state of refrigerator fan motor

The display of represents the ON/OFF state of the refrigerator fan.

“ ” Lit

a) Damper serial number

c) Refrigerator fan ON/OFF

d) Display during the damper operation “Blinking”

Blinking

b) State of damper

: present state : next state ( When the damper of the selected compart ment is in operation, the indicator in the present state blinking.)

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Switching ON/OFF the refrigerator fan motor

During this mode, touching turns on the box fan motor and touching turns it off.

The ON/OFF state of the refrigerator fan motor is represented by

display Fan motor in the unit

Lit ON

Not lit OFF

Release

With the ice making compartment door open, touch

and simultaneously for 3 seconds until, 2 short beeps sound.

The function is automatically released in one hour. Although unplugging and plugging the power code can release this function, it is recommended to follow the procedure

above for protection of the compressor.

Blinking

Opening and closing dampers

(1) Touch to select the damper to be set.

Each touch of

changes the damper type along with a short beep. The serial number described in a) indicates the selected

damper.

The selected damper is displayed using the serial number (1: refrigerator ~ 13: ceiling R) in numeric order repeatedly.

Damper operation indicators

not lit.

When the selected damper is in operation, the indicator for the present state brinks.

When any damper including those which are not selected is in operation, blinks.

(2) To open the damper, light up by touching . To close the damper, turn off by touching again.

(3) Touch

for 3 seconds to operate the damper until 2 short beeps sound.

The setting of the operating damper cannot be changed. The operation of the dampers which are not selected will be

locked. During the damper operation mode, the dampers will not be controlled to open or close based on the detected temperature of the thermistor.

The damper operation stops automatically. (The indicator stops blinking and remains lit.)

e.g.) To open the damper of the ice making compartment, which is currently closed, select the items shown below and touch

for 3 seconds.

Blinking

a) Serial number “3” : Ice making compartment

b) State of damper Present: (Not lit) Next:

c) Refrigerator fan Lit: ON

Present Next

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a) Thermistor Serial number

c) Ones place of the thermistor temperature

b) Tens place of the thermistor temperature

d) Plus and minus sign of the thermistor temperature

“ ” “ ” Lit

Blinking

4) Thermistor temperature check mode

Setting

With the ice making compartment door open, touch and simultaneously for 3 seconds until 2 short beeps sound.

blinks.

With the ice making compartment door open, touch to select the blinking .

With the ice making compartment door open, touch for 3 seconds until 2 short beeps sound.

The thermistor temperature check mode has started. This mode continues even if the door gets closed.

The thermistor temperature check mode is not available during the demonstration mode, the compressor rotational speed change mode, damper operation mode, the set temperature adjustment mode, the error history display mode, or when the child lock is enabled.

Display during the thermistor temperature check mode

During thermistor temperature check mode,

blinks and and are lit.

Displaying the thermistor temperature

The kind and temperature of thermistor are displayed on the operation panel.

The outside air temperature detected by thermistor may be a little different from the actual temperature due to the influence of the temperature in the refrigerator.

a) Thermistor serial number

Each serial number is assigned to each compartment (thermistor), which is used in thermistor temperature mode and set

temperature adjustment mode besides thermistor operation mode.

The values (8, 4, 2, and 1) are assigned to each indicator. The sum of the values corresponding to the lit indicators is the

thermistor serial number.

Display Corresponding values

b) Tens place of the thermistor temperature

Display of , , and corresponds to the values 8, 4, 2, and 1 respectively. The sum of the values corresponding to the lit indicators is the tens place of thermistor temperature.

Display

Corresponding

values

Serial number Assigned compartment Thermistor temperature check mode

1 Refrigerator compartment 2 Chilled 3 Ice making compartment 4 Versa compartment 5 Vegetable compartment 6 Freezer compartment 7 Defrosting 8 Ice tray 9 Outside air

10 Deodorization

Versa compartment ther-

mopile 12 Defrosting-2 13 Ceiling R 14 Ice maker thermopile

Chilled compartment ther-

mopile

/ : SW operation is effective/ineffective

Chilled: For lower case

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c) Ones place of the thermistor temperature

Display of , , and corresponds to the values 8, 4, 2, and 1 respectively. The sum of the values

corresponding to the lit indicators is the ones place of thermistor temperature.

Display

Corresponding

values

Changing the thermistor on display

While thermistor temperature is displayed, touch .

Each touch of

changes the thermistor type along with a short beep.

Each thermistor is displayed using the serial numbers described in a) in numeric order repeatedly (1: refrigerator compartment ~ 15: Chilled compartment thermopile).

Release

With the ice making compartment door open, touch and simultaneously for 3 seconds until 2 short beeps sound. The screen returns to the normal temperature display.

The function is automatically released in 1 hour. Although unplugging and plugging the power code can release this function, it is recommended to follow the procedure

above for protection of the compressor.

d) Plus and minus sign of the thermistor temperature

Plus and minus signs of thermistor temperature are represented by .

display Thermistor temperature signs

Lit

Not lit +

e.g.) The freezer compartment thermistor reads –25 ºC.

Ones place

“5” (=4+1)

b) Tens place “2”

c) Sign “-”

“ ” “ ” Lit

Blinking

a) Serial number “6” : Freezer compartment

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5) Error history display mode

The errors occurred in the past can be observed as an error history. Use this mode when the actual problem of the refrigerator is different from the error that was displayed when the service-call received. The error history display mode offers two ways of display. One of the two is “history display mode,” which shows all errors occurred in the past in numeric order of the error code; the other is “order of occurrence mode,” which shows the newest 5 errors (at the maximum) from the newest to the older. The error history display mode starts with “history display mode.”

Setting

With the ice making compartment door open, touch and simultaneously for 3 seconds until 2 short beeps sound.

blinks.

With the ice making compartment door open, touch to select the blinking .

With the ice making compartment door open, touch for 3 seconds until 2 short beeps sound.

The history error mode has started. This mode continues operating even if a door gets opened.

Display during the error history display mode

During error history display mode, blinks and is lit.

Display of error history information.

a) Mode display

Display the selected mode, “history display mode” or “order of occurrence mode.”

b) Tens place of the error code

It displays the tens place of error code. It applies the same representative method as the error display of self-check.

c) Ones place of the error code

It displays the ones place of error code. It applies the same representative method as the error display of self-check.

24, 25, 26

Mode display

b) Tens place of the error code

c) Ones place of the error code

“ ” Lit

Blinking

Switching over the mode

Touch to select the preferred error history display mode.

Each touch of

switches the mode between “history display mode” and “order of occurrence mode” along with a

short beep.

Display Error history display mode

History display mode All errors occurred in the past are displayed in numeric order of the error code.

Order of occurrence mode The newest 5 errors (at the maximum) are displayed from the newest to the older.

OAH162

Tens place

Ones place

Error code

Pre-display

3sec.

0.5 sec.

Repetition

0.5

sec.

0.5

sec.

0.5

sec.

5sec. 5sec. 5sec.

E01 E13 E31

3sec.

Pre-display

Display method

Display method of the error code is the same as self check error display. (Refer to 5-2(3)); however, all indicators used for the display of error code light up simultaneously for 3 seconds before the first error code is displayed (“pre-display”). e.g.) When errors occurred in the following order: Refrigerator

fan motor error (E31) Communication error of operation panel (E01) Refrigerator thermistor error (E13)

• Display during the history display mode

Errors are displayed in numeric order.

•Display during the order of occurrence mode

Errors are displayed from the newest to the older.

Tens place

Ones place

Error code

Pre-display E13 E01 E31

3sec.

0.5 sec.

Repetition

0.5

sec.

0.5

sec.

0.5

sec.

5sec. 5sec. 5sec. 3sec.

Pre-display

Points to be checked and resetting the error history

Check and take appropriate measures according to the procedures as stated in 5-2(1).

Conduct self-check again to make sure there is no malfunction. (Make sure all connectors are connected properly and

there is no loose connection.)

Refer to “ Setting” and set the error history mode again. With the ice making compartment door open, touch

for 3 seconds to reset the error history. If it is completed correctly, no error code will be displayed.

Release

With the ice making compartment door open, touch and simultaneously for 3 seconds until 2 short beeps sound. The screen returns to the normal temperature display.

The function is automatically released in one hour.

Although unplugging and plugging the power code can release this function, it is recommended to follow the procedure

above for protection of the compressor.

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6) Setting adjustment mode

The temperature of each compartment and the energization rate of the heaters can be adjusted by touching the buttons on the operation panel. There are two modes. In the “setting adjustment mode”, the setting temperature of the compartment is adjustable. In the “heater energization rate adjustment mode”, you can adjust the energization rate of the pipe heater. Start the setting adjustment mode first to operate these modes.

Setting

With the ice making compartment door open, touch and simultaneously for 3 seconds until 2 short beeps sound.

blinks.

With the ice making compartment door open, touch to select the blinking .

With the ice making compartment door open, touch for 3 seconds until 2 short beeps sound.

The set temperature adjustment mode has started. This mode continues operating even if the door gets closed.

Display during the set temperature adjustment mode

During set temperature adjustment mode, blinks and and are lit.

a) Compartment serial number

Each serial number is assigned to each compartment that will be used in the set temperature adjustment mode besides

damper operation mode and thermistor temperature check mode.

The values (8, 4, 2, and 1) are assigned to each indicator. The sum of the values corresponding to the lit indicators is the

compartment serial number.

Display Corresponding values

b) Set temperature adjustment level

3 indicators of , and display the adjustment level of the setting temperature.

(2) Adjusting the set temperature

i. Select the compartment with

Each touch of

changes the compartment of which set temperature will be adjusted along with a short beep.

Each compartment will be displayed using the serial numbers (1: Refrigerator compartment~ 6: Freezer compartment) in numeric order repeatedly.

a) Compartment serial number

b) Adjustment level “–” signs

b) Set temperature adjustment level

Blinking

Mode display

(Not lit): Setting adjustment mode

“ ” “ ” Lit

Switching the mode

Select the mode to adjust with . Each touch of

switches the mode between “setting adjustment mode” and “heater energization rate adjustment mode”

along with a short beep.

display

Setting adjustment mode

Not lit Setting adjustment mode Adjusts the temperature of each compartment.

Lit

Heater energization rate adjustment mode

Adjusts the heater energization rate of the pipe heater.

Setting adjustment mode

(1) Display

Serial number Assigned compartment

Set temperature adjustment mode 1 Refrigerator compartment 2 Chilled 3 Ice making compartment 4 Versa compartment 5 Vegetable compartment 6 Freezer compartment

/ : SW operation is effective/ineffective

Chilled: For lower case

OAH162

ii. Select the adjustment level of the set temperature by touching .

Each touch of

changes the adjustment level of the set temperature along with a short beep.

There are 5 adjustment levels of set temperature, and the selected level is displayed.

Adjustment level Temperature adjustment display

Change of the set

temperature

About +2 ºC

+1 About +1 ºC

±0 No change

−1 About −1 ºC

−2 About −2 ºC

The changed adjustment level is stored in the control board. If the control board is replaced, the updated information will be lost.

Release

With the ice making compartment door open, touch and simultaneously for 3 seconds until 2 short beeps sound. The screen returns to the normal temperature display.

The function is automatically released in one hour. Although unplugging and plugging the power code can release this function, it is recommended to follow the procedure

above for protection of the compressor.

Heater energization rate adjustment mode

(1) Display

a) Heater serial number

The values 2 and 1 are assigned to the 2 indicators. The sum of the values corresponding to the lit indicators is the heater serial number.

Display Corresponding values

2 1

Serial number Assigned Display

1 Pipe heater

b) Heater energization rate adjustment performed / not performed

Stop button displays if the heater energization rate adjustment is performed or not performed.

Display:

Heater energization rate adjustment

Not lit Not performed

Lit

Performed

a) Heater serial number

b) Heater energization rate adjustment Performed / Not performed

Blinking

Mode display

(Lit): Heater energization rate adjustment mode

“ ” “ ” Lit

(2) Adjusting the heater energization rate

i. Select the heater to adjust the heater energization rate with

Each touch of

makes a short beep, then changes the heaters to alter the energization rate thereof.

The indicators will be displayed in numerical order according to the compartment serial number as shown in

a) and switched alternately between 1. pipe heater and 2. tank heater.

ii. Select to perform or not to perform the heater energization rate adjustment with .

Each touch of

makes a short beep, and changes to perform it or not.

Display:

Heater energization rate adjustment

Not lit Not performed

Lit

Performed

When selecting to perform the heater energization rate adjustment, the heater energization rate is controlled to be higher. The selected state for “performed” or “not performed” is memorized in the control board. If the control board is replaced, the

memory regarding the adjustment will be lost.

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Door Alarm System :

Door alarm has been installed so that one will not forget to close the door.

• The alarm beeps in the following cases:

1. Any of the doors is left open.

2. The refrigerator fan motor or the box fan motor has a failure.

3. The ice tray lock lever is removed while ice making operation is performed. Alarm sound pattern

Alarm Interior LED

Indicators of compart-

ment

1. Any of the doors is left open. 1 minute elapsed.

2 short beeps + 2 long beeps

Lit

The indicator flashes

along to the alarm

sound.

2 minutes elapsed.

2 short beeps + 3 long beeps

3 minutes elapsed.

2 short beeps + 4 long beeps

4 to 5 minutes

2 short beeps + Continuous long beep

2 flashes every

1 minute

More than 5 minutes

Continuous short beeps*

60 minutes or more Continuous short beeps* OFF

2. The refrigerator fan motor or the box fan motor has a failure.

A short beep followed by a long

beep (twice)

3. The ice tray lock lever is removed while ice making operation is performed.

5 short beeps

The indictor of

flashes.

1. Any of the doors is left open.

• The alarm alerts that the door is open when any of the compartment doors is left opened for 1 minute or more.

• The alarm stops alerting as soon as the door is closed.

• When the alarm does not stop even though all the doors are closed, the door switch may be abnormal.

(Note: If the test is conducted with water in the ice tray, water may fall into the ice storage box because the tray turns over in the ice making operation.)

The indicator of the compartment on the operation panel blinks along to the alarm sound.

2. The alarm alert when a trouble is found in the refrigerator fan motor or in the box fan motor. The alarm alert every time the door is closed until normal operation is obtained. (Check the error code by following the steps in Self-check and error display method and operation on page 23.)

3. The ice tray lock lever is removed while the ice making operation is performed

• The alarm reminds the user not to install or remove the ice tray during ice making operation.

• During ice making operation, the indicator representing the ice making compartment on the operation panel blinks.

Interior LED :

• When the door of the refrigerator compartment is opened, the interior LED in the refrigerator compartment turns on.

• While beeping continues due to the door that is left open for 4 or more minutes, the interior LED blinks twice per minute, which reminds the user to close the door.

• If the interior LED continues to light for 60 minutes or more, the overheating protection is activated, which turns off the interior LED.

• After that, closing the door releases the overheating protection function. The interior LED will turn on again when the door is opened next time.

Compartment

display area

(Operation panel)

Blinks in synchronization with the alarm sound.

Blinking

The alarm can be temporarily stopped in the time before the refrigerator is repaired. Press

for at least 5 seconds.

*If performing the above operation does not turn off the alarm, or the alarm

periodically sounds, check peripheral machinery as well.

To Stop the Alarm (Continuous Short Beeps)

Example: When the doors of the re-

frigerator compartment and ice making compartment are open.

When the door of the refrigerator

compartment is open, S-COOL blinks along with REF.

OAH162

MR-B46Z-C (1) Troubleshooting with self-check

This refrigerator has a self-check feature to clarify and indicate where and 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.

5-2 FLOWCHART OF SELF-CHECK

Self-check

Error history mode (Refer to 5-1.(6)5)) Problem may recover automatically. Perform the following if error is not displayed before taking measures or the error which was informed from user by telephone is not displayed.

Operate the ice-making test. (Current displayed error: Refer to 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 in the table below.)

Locate the trouble according to error display. (See page 24-26)

Is error displayed?

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

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

Yes

Is error displayed?

Was any

displayed during repair?

Yes

NoYes

Yes

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

*Wait 10 minutes before plugging 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 failure part(s) according to error display.

Self-check is finished.

Set the error display mode.

Reset the error history.

(Refer to 5-1.(6)5))

Perform self-check procedures through .

Perform error history mode.

Was the error which was informed

from user by telephone displayed?

And were measures taken?

Perform error history mode.

Note1: Self-check cannot detect abnormalities in the following parts. See pages 31-43 for troubleshooting. Door switch Motor damper Heater (Water pipe/Vegetable compartment heater, etc.) Water pump motor Note2: If any abnormality is found when plugging the power cord, compressor and fan motor stop for 10 minutes.

Note3: The alarm beeps when some abnormalities (motor-locked) have occurred at the refrigerator fan motor or the box fan motor. The alarm beeps every time the door is closed until normal operation is obtained.

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).

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.

Operation method Display or self-check operation Display period OthersItem

Ice making test operation.

1.Conduct the automatic ice making test. (All the “ ”, “ ”,and “ ” indicators blink.)

2.When any trouble is found, all error codes are displayed.

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

For 10 minutes after setting.

Self-check is not available during the compressor rotational speed change mode, the thermistor temperature check mode, the damper operation mode, the demonstration mode, or when the child lock is enabled.

Self-check is not available during the demonstration mode.

For 10 minutes after power is supplied.

For 1 hour after setting, or until the mode is released.

1.When any trouble is found, all troubles except E50 ~ E55 are displayed.

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

1.When any trouble is found, all troubles except E50 ~ E57 are displayed.

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

To hc h

for 5 seconds. (2 beeps sound.)

Plug the power cord into outlet.

Refer to 5-1.(6)5) Error history display mode.

Power input. All items except (*6) listed up on the table at page 26 will be checked.

Error history

Self-check

(current displayed error)

Display error

history.

OAH162

(3) Error display and trouble locating

1. Display details

After conducting the self-check referring to 5-2(1),

flashes repetitively and the error code is displayed. The tens place and ones place of the error code is displayed separately. When two or more errors occur, they are displayed alternately. The error of which code has smaller number has priority to be displayed first. There are 0.5 seconds intervals between the error codes.

(2) Timing in self-check

Trouble of Defrost heater : Self-check is conducted after defrosting. (Make sure to check the display before unplugging the power cord because it is automatically reset once the power cord is unplugged.)

Trouble of Ice maker : Touch

for 5 seconds to operate the automatic ice maker.

All the "

", " ", and " " indicators blink when operation is being checked during the test operation. Trouble of Fan motor : Open the door and then close it. When any abnormality is found in fan motor, the alarm sounds every time the door is closed. Trouble of Inverter : Check the error when the compressor starts up or is operating. Trouble of Thermistor : Self-check is continuously working.

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

2. Check point and corrective measures

e.g.) The errors of refrigerator thermistor (E13) and ice maker gear box (E33) are occurring simultaneously.

Tens place

Ones place

Error code

0.5

sec.

0.5

sec.

0.5

sec.

5sec.

E13 E33 E13 E33

5sec. 5sec. 5sec.

b) Tens place of the error code

Display

Corresponding

values

b) Tens place of the error code

c) Ones place of the error code

Flashing

c) Ones place of the error code

Display

Corresponding

values

Display

Error code

Display

Trouble

Detecting method

(*3)

Check point

Corrective

measures

Control

Tens place

Ones place

Self-check

Testing

(*1) Ice maker is under testing

Error display

(*4) Communication error of operation panel

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

• They transmit and receive data that is unrelated to the settings.

•

They cannot transmit

and

receive data

for

about 10 seconds.

1. Connector CN9S on control board 6-pin wire to wire connector (hinge) 6-pin connector on operation P.C. board

Repair the contact failure.

The same operation as that before the communication error has occurred is continued.

2. Trouble of control board or operation P.C. board

Replace.

Communication error of inverter

A commutation error occurs between refrigerator control circuit and inverter control circuit in control board. (They do not transmit and receive data for 10 seconds.)

Replace the control board.

Compressor turns OFF.

E03

Trouble of model judgement

The model of control board is different from that of operation P.C. board.

1. Check the model name of control board. Replace. The operation continues.

The error code is displayed.

2. Check the operation P.C. board. Replace.

E11

Trouble of freezer compartment thermistor

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

1. Connector CN9S on control board,

6-pin wire to wire connector

Repair the contact failure.

After the compressor turns OFF for 10 minutes, it turns ON for 30 minutes and OFF for 20 minutes repeatedly.

2. Check the resistance of thermistor. Replace.

E12

Trouble of defrost thermistor

There is a short or open circuit in the defrost thermistor.

1. Connector CN9S on control board,

4-pin wire to wire connector

Repair the contact failure.

The defrost heater is disabled.

2. Check the resistance of thermistor. Replace.

OAH162

Display

Error code

Display

Trouble

Detecting method

(*3)

Check point

Corrective

measures

Control

Tens place

Ones place

Self-check

Error display

E13

Trouble of refrigerator thermistor

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

1. Connector CN9S on control board, 2-pin wire to wire connector

Repair the contact failure.

• The compressor is ON, the damper of the refrigerator compartment is open.

• The compressor is OFF, the damper of the refrigerator compartment is close.

2. Check the resistance of thermistor. Replace.

E14

Trouble of chilled thermistor

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

1. Connector CN9S on control board, 6-pin wire to wire connector

Repair the contact failure.

• When the motor damper for refrigerator compartment is open, the motor damper for chilled compartment and ice making compartment is open.

• When the motor damper for refrigerator compartment is closed, the motor damper for chilled compartment and ice making compartment is closed.

2. Check the resistance of thermistor. Replace.

E15

Trouble of versa compartment thermistor

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

1. Connector CN9S on control board, 6-pin wire to wire connector

Repair the contact failure.

• When S-compartment is used as “freezer”: S-damper is open when compressor is ON, S-damper is closed when compressor is OFF.

• When S-compartment is used as other than “freezer”: S-damper remains open for the first 3 minutes after the compressor turns ON and then closed for the rest of time.

S-compartment: Versa

compartment.

S-damper: Motor damper

for versa compartment.

2. Check the resistance of thermistor. Replace.

E16

Trouble of vegetable compartment thermistor

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

1. Connector CN9S on control board, 4-pin wire to wire connector

Repair the contact failure.

• When R-damper is open, V-heater is ON.

• When R-damper is closed, V-heater is OFF. R-damper: Motor damper for refrigerator compartment.

V-heater: Vegetable

compartment heater.

2. Check the resistance of thermistor. Replace.

E17

Trouble of ice making compartment thermistor

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

1. Connector CN9S on control board, 6-pin wire to wire connector

Repair the contact failure.

•

The compressor is ON, the damper of the ice making compartment is open.

•

The compressor is OFF, the damper of the ice making compartment is close.

2. Check the resistance of thermistor. Replace.

E18

Trouble of outside air thermistor

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

Replace the operation P.C. board.

The control under the assumption that the outside temperature is 25 °C is performed.

E25

Trouble of ice maker thermopile

There is a short or open circuit in the ice maker thermopile

Connector CN9S on control board, 4-pin wire to wire connector (at the bottom left hand side in the back of the refrigerator compartment), wire to wire connector (in the ceiling of the ice making compartment)

Refer to "5-8.3 Failure diagnosis for the

thermopile (Ice maker thermopile)".

Ice making test operation starts when the freezing compartment thermistor reads temperatures of –10°C or less and the door keeps closed for 3 hours or more.

E30

Trouble of defrost heater-2 (*6)

Defrosting is not finished in 2 hours.

1. Connector CN3A, CN2A on control board, Defrost heater-2, 1-pin wire to wire connector,

Thermal fuse 4-pin wire to wire connec-

tor

Repair the contact failure.

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

2. Check the resistance of defrost heater-2.

Replace.

3. Check the continuity of thermal fuse. Replace.

E31

Trouble of refrigerator fan motor

• The motor does not rotate even though power is on.

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

1. Connector CN5D, CN9S on control board, Refrigerator fan motor 4-pin wire to wire connector

Repair the contact failure.

•

3 minutes later, the refrig-

erator fan motor is reactivated to be checked.

• Until the fan motor operates correctly, the alarm sounds every time the door is closed.

2. Check refrigerator fan motor operation. Replace.

E32

Trouble of box fan motor

• The motor does not rotate even though power is on.

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

1. Connector CN5D, CN9S on control board,

4-pin wire to wire connector

Repair the contact failure.

• 3 minutes later, the box fan motor is reactivated to be checked.

• Until the fan motor operates correctly, the alarm sounds every time the door is closed.

2. Check box fan motor operation.

Replace.

OAH162

*1: All the " ", " ", and " " indicators blink after button operation for ice making test operation or during 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-circuited.

When the resistance is 0

, the circuit is deemed short-circuited. *4: Once E01 is detected, other errors would be ignored and not displayed on the panel. *5: Characteristic value may change in order to improve the product. *6: The error codes E50 to E55 are not displayed even if those abnormalities occur when power is turned on. Therefore, be sure to perform ice making test operation in order to check if any abnormality indicated by these error codes occurs. (See page 23.) *7 : If those errors still continue for 1 minute after the restart, E56 will be displayed again.

Display

Error code

Display

Trouble

Detecting method

(*3)

Check point

Corrective

measures

Control

Tens place

Ones place

Self-check

Error display

E33

Trouble of ice maker gear box

The gear box operation is not finished in 30 seconds.

1. Connector CN9S on control board, ice gear box 6-pin wire to wire connector.

Repair the contact failure.

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

2. Ice gear box is frozen or has a sign of frost.

Replace.

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

Replace.

E34

Clogging of refrigerant pipe or trouble related to compressor

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

•The difference between T0 and T1 is T0

T1. (*5)

Check the compressor and the pipe. When cooling operation

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

E50

Trouble of inverter circuit

• There is any trouble in the circuit which detects current of compressor.

Refer to “Compressor does not operate” on page 34.

The compressor is stopped and reactivated 10 minutes later.

E51

Trouble of bus-bar voltage

•

The range of bus-bar volt-

age is not approx.

50 ~ 340 V DC.

E52

Trouble of inverter software reset function

• The inverter driving software malfunctions.

E53

Trouble of startup, synchronization or overcurrent detection

• There is no current at compressor startup.

• The phase current exceeds 5.5 A at compressor startup.

• The phase current exceeds 3.3 A during compressor operation.

•

A current of 5.3 A or

more runs into the busbar of control board.

E55

Trouble of control board (EEPROM related trouble)

EEPROM (IC11M) accumulates data necessary for control.

• The data are not input accurately.

• The microcomputer cannot read the data.

Replace the control board.

If abnormality occurs when power is turned on, the compressor is stopped for 10 minutes. When abnormality occurs during normal operation, the compressor keeps operating.

E56

Defective wiring connecting or trouble of control board

The errors E50 to E53 keep occurring over one and a half hour. (The situation, which compressor cannot be operated, continues.)

Refer to “Compressor does not operate” on page 35.

• The error display starts after the error is determined as E56.

• The error display continues until defrosting starts or cooling operation gets back to normal. (The error display does not disappear by unplugging and plugging the power cord. *7)

• An attempt to restart the compressor is repeated every

3 minutes.

E57

Inverter drive module abnormality

The overcurrent error is detected before starting the compressor (failure of the IC in the inverter drive module).

Replace the control board.

An attempt to restart the compressor is repeated every 3 minutes.

(*6)

Replace the control board.

OAH162

5-3 BLOCK DIAGRAM OF PRINTED CIRCUIT BOARD

(1) Ice making cycle

(2) Automatic ice maker circuit

5-4 AUTO ICE-MAKER

Ice stock

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

Ice ejection

After the sensor lever checks the amount of ice, the ice tray is turned over for ice ejection. When the ice storage box

is filled with ice, the ice tray stops turning over.

Water supply

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

Ice making

Ice maker thermopile watches and controls the ice making operation

Operation P.C. board

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

• Display of self-check

• Outside air thermistor

• Alarm

Control board

Control circuit of refrigerator

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

• Control on timers

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

Inverter control circuit of compressor

• Inverter control of compressor

• Inverter-drive power module

• Detection of bus-bar voltage

MR-B46Z-C

25 25

Control board

CN2A

CN5D

CN9S

CN3A

6-pin connector

Water supply pipe heater

Water tank heater

Water supply pump motor

Ice making compartment thermistor

Ice tray detection reed switch

Ice maker gear box

Ice maker thermopile

4-pin connector

Parts outside/inside refrigerator

For 310V DC system

•

Compressor

For 110V AC system

•

Defrost heater-1

•

Defrost heater-2

•

Vegetable compartment heater

•

Water pipe heater

•

Drain pipe heater

•

Duct heater

•

Chilled heater

•

Water tank heater

For 12V DC system

•

Refrigerator fan motor

•

Box fan

•

Ice maker gear box

•

Interior LED

•

Motor damper for versa compartment and vegetable compartment

•

Motor damper for refrigerator compartment

•

Motor damper for chilled compartment and ice making compartment

For 5V DC system

•

Freezer compartment thermistor

•

Refrigerator compartment thermistor

•

Defrost thermistor

•

Door switch (for refrigerator compartment)

•

Door switch (for ice making compartment)

•

Door switch (for freezer compartment)

•

Door switch (for vegetable compartment)

•

Door switch (for versa compartment)

•

Vegetable compartment thermistor

•

Versa compartment thermistor

•

Chilled thermistor

•

Ice making compartment thermistor

•

Position-specifying switch ice maker gear box

•

Ice tray detection reed switch

•

Ice maker thermopile

•

Water supply pump motor

•

Vegetable compartment LED

OAH162

Ice making test completes in about 20 seconds.

(3) Operation by ice making test

Touch for 5 seconds.

(See 5-2(1) “• Selfcheck and error display method and operation,

Ice mak-

ing test operation”

The sensor lever detects the amount of ice.

The sensor lever once comes down to detection point then returns to the original position.

The ice tray is turned over and return.

The ice tray turns over once to drop the ice, then returns to the original position.

The water pump motor operates.

Completion When abnormality occurs, the error code is displayed on the panel. Inspect the abnormal points by referring to page 24-26.

[Check point of automatic ice maker operation]

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

During the operation, do not insert a hand into the automatic ice maker.

(5) Maintenance for water supply pump and water supply pipe

Follow the procedures below when disassembling, cleaning, and assembling the pump and the pipe. Explain to customers that periodic cleaning is required. (The instructions for cleaning are described in the instruction manual.) The inside of the pump can be cleaned after disassembling the pump in the water tank. The inside of the pipe can be cleaned after disassembling the water supply pipe in the tank holder.

Set the water tank in place and check that water level decreases when viewed from the front.

Check that water level decreases.

Ice Server

Ice TrayReference Line

Sensor Lever (Detects the ice storage level)

Ice Storage Box

Door

Lay flat

(4) Checking the ice tray detection reed switch.

Check that the indicator is lit when releasing the ice tray lock lever. Also, check that the indicator goes out when setting the ice tray lock lever.

*The display goes out for power saving when the operation panel is not

operated for 30 seconds or more. (The

indicator also goes out.)

While the display is gone out, the

indicator that represents the status of the ice-tray lock lever comes on when any of the doors of the refrigerator, ice making, and freezer compartments is opened or closed.

Status of ice tray lock lever

Display of

Lit

The ice tray lock lever is set.

No lit

While the indicator is blinking, ice ejection is not conducted.

The ice tray lock lever is not set.

Water Tank / Water Supply Pump

Once a week

Disassemble the water supply pump and wash it.

Leadcleaning Filter

Wash by lightly rubbing. * Do not use cleaners such as kitchen detergents (neutral), benzene, or bleach. Doing so may result in odors of the ice.

Pull out the tank packing from the water tank.

Pull out the tank pipe and rotate and remove the water supply pump.

Wash the water tank.

Remove the water tank, remove the lid, and wash it.

Wate r Tank

When using bleaching agents to clean the water tank and lid, follow the instructions of the agents.

Tan k Packing

Water Supply Pump

Tank Pipe

wate

Was

Remove the tank cap by twisting it.

Impeller Holder

Cap

Impeller

The impeller is made from a magnet. Wash it thoroughly to remove any foreign objects.

Remove the cap lid while opening the tab.

Cap Lid

Assembling the water supply pump

Rotate

Rotate and set the water supply pump onto the water tank.

Align the triangle mark on the bottom of the water tank with the triangle mark on the cap lid and push in while making sure that there is no gap.

After Assembly

Fit the cap lid onto the cap.

After Assembly

Attach the impeller to the impeller holder.

After Assembly

Rotate and ¿ x the tab ( ) of the cap into the projection (

) on the impeller holder.

Make sure that the impeller is inside.

Rotate

)LWWKH¿ lter

onto the cap.

After Assembly

Lid

If mold forms easily in certain types of water, clean about 2 or 3 times a week. * When not making ice, remove the water.

OAH162

When making ice, set the ice making compartment's setting to .

Water Supply Pipe and Tank Holder

Once a month

Ice Tray

1 to 2 times a year

Open the door of the ice making compartment and unlock the ice tray lock lever.

Pull the ice tray towards the front and then remove it.

Empty the ice tray and wash it.

Attach the ice tray

Push in the ice tray until it makes a clicking sound, and then lock the ice tray lock lever.

Pull out the water supply pipe and wipe the tank holder with a clean cloth.

Disassemble and wash the parts.

Follow the procedure in reverse to return the parts to their original positions.

Check whether there are any foreign objects between the water supply pipe, tank packing, and tank holder.

Tank Holder

Ice Tray Lock Lever

Water Supply Pipe

There is a risk of the water spilling. Pull out the tray slowly.

After washing the tray, dry off any moisture.

Do not pour water into the tank holder. Doing so may cause a malfunction.

Twist and remove the water supply pipe.

White minerals or chlorine accumulation may adhere to the parts, this is not abnormal. Wash off such substances and reuse the parts.

Push in the water supply pipe fi rmly so there are no gaps. If there are gaps or looseness, it may cause a malfunction.

Insert it horizontally so that there are no gaps.

Failing to do so may cause noises to occur, ice to not freeze, and may also cause the water in the water tank or food in the refrigerator compartment to freeze.

Pipe

Tank Holder

will appear on the operation panel. If the alarm sounds continuously when the ice tray lock lever is unlocked, lock the lever, close the door, wait for the blinking

to turn off, and then try again.

will disappear. If the lamp does not disappear, check

the position of the ice tray lock lever and the up and down orientation of the ice tray.

WWWWWWWWWWWWWWPW

Easier to disassemble/assemble when wetted

Unlocked

Tan k

Packing

Water Supply Pipe

Horizontally

So that foreign objects do not

get inside

Before cleaning, make sure to set "Stop Ice

Making."

Locked

Water Supply

Install the tank packing

Tank Pipe

Water Tank

Insert the tank pipe into the water

tank.

Connect the tank pipe to the

water supply pump.

Check that there are no foreign objects between the tank pipe and the water supply pump.

Tank Pipe

Water Supply Pump

Caution

Do not let foreign objects block the hole.

Installing the tank pipe

Tank Packing

OAH162

(6) Troubleshooting for automatic ice maker *First, make sure that is not lit.

Trouble with ice making.

The ice tray is set.

The ice tray lock lever is locked.

The "

" indicator is not lit on the control panel.

Water or ice exists in the ice tray.

There is a possibility of a failure on the ice making gear box, deficiency in cooling performance, an error in the detection of water supply, or detection of full ice level in the ice storage box.

The ice does not come out from the tray

1. Check inside of the ice storage box. •

Ice cubes are not stored flatly and the amount is detected as full.

•

Something like food is inside the ice storage box

Check and correct the

problem.

2. Check the detected temperature and the voltage of the ice making compartment thermopile.

• Refer to Failure diagnosis for the thermopile.

Replace the ice maker thermopile.

3. Check whether the temperature of the freezer compartment is cool enough. Extra time is required to make ice in summer or when the door is opened or closed frequently.

• Not enough Poor cooling

4. Check whether the ice tray is set correctly.

(Make sure it rotates during ice making

test.)

• The ice tray is not properly engaged. (E.g. The ice tray or the handle installed upside down. They are not installed squarely.)

Check and correct the

problem.

5. Check whether " " on the operation panel is blinking.

• Blinking The door is open when ice is

making.

Check whether the door

is open/close.

Check the door switch.

No water or ice in the ice tray

Water supply path may have a failure, the ice tray may have a crack or not be set in place, or the presence of the ice tray may not be properly detected.

Water

in water

saucer

6. Check the water pipe for dirt and foreign objects.

• Clogging

•

Freezing (For freezing, check installation and measure the resistance of water pipe heater.)

Clean the water pipe. Deice Check connection of

water pipe heater.

No waterdrops in water saucer

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

• Dirt or foreign objects

Repair and explain to the user for proper usage.

8. Tank pipe is clogged, has a hole, or is not

properly installed.

• Clogging, disconnecting

• Hole or crack

Clean/Reinstall it properly.

Change the tank pipe.

9. Check water in the water tank.

•

Freezing (Check the tank packing, the tank pipe, and the water pump for proper installation. If they are properly installed, check the water pipe heater for proper installation, and measure the resistance of them.

Check and correct the

problem.

10. Check installation of the water tank.

•

The water tank is raised by foreign

objects or food items.

(Foreign objects caught under the

water tank may prevent the water tank from functioning.)

Check and correct the

problem.

11. Check the coil resistance of the water supply pump motor.

• Open or short circuit

Replace the water supply pump.

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

• Crack or deformation

Replace the water tank.

The " " indicator is lit on the control panel.

13. Check the resistance of the ice tray

detection reed switch.

• Open circuit (

)

Replace the reed switch

assembly.

14. Check the presence of a magnet in the ice

tray lock lever and its magnetic force.

• NG (no magnet or weak magnetic force)

Replace the ice tray

lock lever.

The ice tray lock lever is not set.

15.

Check whether the ice lock lever is set in place.

Check and correct the problem.

The ice tray is not set.

16. Check whether the ice tray is set. Install the ice tray.

Extra time is taken to make ice. (The amount of ice is few in the ice storage box.)

17. Is the ice making compartment cooled sufficiently?

Extra time is required to make ice in summer or when the door is opened or closed frequently.

• Not cooled sufficiently. Poor cooling

18. Visually check the rotating direction of the water supply pump.

(Install only the water supply pump and the

impeller on the water tank, and conduct the ice making test to check the water supply pump and the impeller rotate counter clock wise.)

* To conduct the ice making test, touch for 5

seconds.

• NG

Remove the water tank

holder and reverse the pin polarities in the wireto-wire connector that connects to the pump motor.

* Refer to page 39.

19. Check the amount of ice in ice storage box.

• The ice box is covered with ice, especially at the middle.

The ice is full. Even out

the ice.

Water in the tank holder

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

• Clogging, disconnecting

• Hole or crack

Clean/Reinstall it properly.

Replace the water sup-

ply pipe.

Chained ice, water leaking

from the ice server

The ice tray is set.

The ice tray lock lever is locked.

21. Check whether the ice tray is properly set.

•

Cracked

•

The ice tray is coming off or not set

in place.

Replace the ice tray.

Reset the ice tray in place.

22. Perform the ice making test and check the operation of the water supply pump.

• Water filling period is longer than 10 seconds.

Replace the control

board.

23.

Water spill at the installation of water tank or too much water over the full water level may cause formation of chained ice.

24. When the grooves are clogged on the water tank, chained ice may form.

Clean/Reinstall it properly

(Check the connection where the tank pipe connects to the water tank.)

25. When the refrigerator tilts in a large angle, chained ice may form.

Check and correct the problem.

26.

Measure the resistance of the water supply pump motor.

• Open or short circuit

Change the water supply pump motor.

The ice tray lock lever is not locked.

27. Check the resistance of the ice tray detection reed switch.

• Open circuit (

)

Replace the reed switch

assembly.

The ice tray is not set.

OAH162

Excessive cooling No cooling, poor cooling

5-5 FLOWCHART OF TROUBLE CRITERION

Refrigerator compartment, Slide chilled compartment [1]

Set the temperature to “Low”.

Keep the food away from air outlet.

Yes

Set the temperature to “High”.

Proceed to [6] on page

36.

Normal

Yes

The baffle does not operate

Yes

Repair the frosted part.

Refrigerator compartment thermistor abnormal

Replace the refrigerator

compartment thermistor.

Is the temperature of refrigerator compartment, set to “Low”?

Only food around the air outlet gets frozen.

Is the temperature of refrigerator compartment, set to “High”?

Check the refrigerator compartment thermistor.

Replace the motor damper for refrigerator compartment.

Does the motor damper for refrigerator compartment have a sign of frost?

After ice making test operation, does the motor damper baffle, for the refrigerator compartment, in the bottom of the refrigerator compartment open and close? (Wait 1 minute for self-check.) (See “Self check method and its operation, Ice making test operation” on page 23.)

Dip the refrigerator compartment thermistor into ice water (0°C), and disconnect the 2-pin connector leading from the thermistor attachment, and measure the resistance between the

(white) and (white) terminals.

• Resistance at 0

: approx. 6-7 k .

Control board

CN9S

CN5D

6-pin connector

2-pin connector

Mortor damper for the refrigerator compartment

Refrigerator compartment thermistor

2121

2323

1717

1919

The set temperature can be adjusted on the operation panel.

Page 20

Open the refrigerator compartment door and attach a magnet on the door switch to check that cold air blows from the outlet. (See

1.)

Refrigerator

compartment

Versa compartment

Ice making compartment

Attach a magnet bar here.

MR-B46Z-C

OAH162

Excessive cooling

Poor cooling

Slide compartment

[2]

Motor damper for chilled and ice making compartment

CN9S

CN5D

6-pin connector

Chilled thermistor

Control board

2626

2929

2424

2222

2020

Not frosted

The baffle does not operate

Does the motor damper baffle, for the chilled and the ice making compartment, in the fan grille open and close? (Wait 1 minute for self-check). (See “Self check method and its operation, Ice making test operation” on page 23.)

Connect the connector properly.

Disconnect CN5D and measure the resistances between

and 22,

and between

and 26 . Check that the winding of the motor damper for

chilled and ice

making

compartment has a resist-

ance of approx. 415 .

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

Failure in the thermistor

Replace the chilled thermistor.

Check the chilled thermistor.

Dip the chilled thermistor into ice water (0ºC), and disconnect the 6 -pin connector in the connector cover in the bottom of the refrigerator control panel, and measure the resistance between the (white) and (white) terminals.

• Resistance at 0 : Approx. 6~7 k

Does the motor damper have a sign of frost?

Frosted

Repair the frosted part.

Replace the motor damper for chilled and ice making compartment.

Normal

Yes

Is connector CN5D on the control board connected properly?

Normal

The set temperature can be adjusted on the operation panel.

Page 20.

Note: Replace the fan grille as the motor

damper for chilled and ice making compartment is integrated in it.

Note: Replace the control panel assem-

bly as the chilled thermistor is integrated in it.

Is supercool chilling set?

Is supercool chilling set to ”Low”?

Open the refrigerator compartment door and attach a magnet on the door switch to check that cold air blows from the outlet. (See

1.)

Release the supercool chilling setting.

Proceed to [6] on page 36.

Only food around the air outlet gets frozen.

Yes

Set supercool chilling to ”Low”.

Keep the food away from air outlet.

Yes

Refrigerator

compartment

Versa compartment

Ice making compartment

Attach a magnet bar here.

If the food is cooled excessively, adjust the temperature setting for lower case (when supercool chilling is set).

Page 9.

OAH162

Poor cooling

Not cooling at all (No error code shown on pages 34 and 35 appears even though is touched for 5 seconds.)

Reactor

6-pin connector

Motor protector

Lead wire assembly

Compressor

CN50GCN4A

Control board

CN1A CN2A

Freezer compartment

[3]

Yes

Proceed to “The refrigerator fan motor does not work” on page 31.

Replace freezer compartment thermistor

Failure in the thermistor

Check freezer compartment thermistor.

CN9S

Control board

-pin connector

Freezer compartment thermistor

Is the terminal voltage 110 V AC across the terminals and in the CN1A connector on the control board?

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

Compressor does not operate

[4]

Yes

Is the refrigerator in the demonstration mode?

Release the demonstration mode. (See page 9.)

Dip the freezer compartment thermistor into ice water (0°C), and disconnect the 6-pin connector in the connector cover in the back of the ice making compartment, and measure the resistance between the terminals

(white) and (white).

•Resistance at 0 : approx. 6~7 k .

Yes

Does cool air blow from air outlet when opening the refrigerator compartment door and attaching a magnet bar on the door switch ?

The set temperature can be adjusted on the operation panel.

Page 20.

Replace

the

compressor

Replace the lead wire assembly (lead wire of compressor).

Abnormal

Normal

Detach connector CN50G on control board and check the resistance between each of the following terminals. , and :approx. 12.4 .

Check the error display of selfcheck after turning off and on the power supply.

With all the connectors connected.

Inverter-related parts may have a trouble. Conduct the ice making test operation to check the error code. (See pages 34, 35 for error codes.)

Continuity detected

Measure the winding resistance of the compressor between each of the following terminals black, white, and red: approx. 12.4

No continuity

Yes

Is the voltage 110 V AC across CN1A and CN4A on the control board?

Is the resistance about 0 Ω between terminals CN4A and ?

No Open

Check that the resistance between terminals CN2A

and is open.

Set the temperature to “High”.

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

Replace the reactor. Replace the lead wire assembly C.

OAH162

Error code

Abnormality

Possible cause

Symptom Corrective measures

Inverter-related indication “Compressor does not operate”

E50

• Abnormal start-up

• Abnormal synchronization

• Overcurrent detection

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

E51

The compressor does not rotate.

Replace the control board.

Bus-bar voltage abnormality

• Power supply voltage is abnormal.

• Failure in the reactor

Replace the control board.

E52

E52 displays again.

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

Trouble of inverter circuit

The compressor does not rotate.

Trouble of inverter software reset function

• The inverter driving software malfunctions due to electric noise.

Unplug the power cord and wait more than 10 minutes then plug it again

No error code display

Explain to customer.

E53

• The compressor motor gets locked.

• Defective circuit on control board

• Poor contact of CN50G on control board

The compressor does not rotate.

Start

Remove the CN50G connector on the control board, and measure the resistance on the compressor. Are the resistances between the terminals

- , - , and

- approx. 12.4

(20 )?

Replace the compressor.

Yes

*If control board is normal, compressor is energized every 10 minutes. The compressor vibrates at start up when it is being energized.

Touch the compressor with your hand to check the vibration.

Measure the winding resistance of compressor between each terminal. Is the resistance approx. 12.4 (20

Replace the

compressor.

*Replace lead wire assembly.

*Is compressor energized at startup?

Check the connection status of the CN50G connector on the control board.

Correct the connection of the CN50G connector on the control board.

Abnormal

Replace the control board.

Yes

Yes Normal

Start

Measure the power

supply voltage.

110 V or more 90 V or less

If the voltage is out of the 90 to 110 V range, domestic electrical wiring may have a failure. Take appropriate measures.

90 ~ 110 V

Is the voltage about 110 V AC across CN1A

and CN4A on the control board? (Refer to page 44)

Replace the control board.

Replace the reactor. (Measure the resistance between the connector terminals of the reactor that are disconnected. Make sure that the resistance is open.)

Replace the lead wire assembly C. (Unplug the power cord and measure the resistance across CN4A

and . Make sure that the resistance is open.)

Replace the power cord.

Is the voltage about 110 V AC across CN1A

and CN2A on the control board?

Is the voltage about 110 V AC across CN1A

and CN2A on the control board?

Check the connection status between the power cord and the control board.

No No

Yes Yes Ye s

Normal

OAH162

Error code

Abnormality Possible cause Symptom Corrective measures

Inverter-related indication “Compressor does not operate”

E56

The compressor cannot be activated for more than 1.5 hours.

1. Locate the trouble and decide on the measures.

• Decide the measures by checking the followings. (1) Poor connector connections.

(On the board and the compressor.)

(2) Winding resistance of compressor

2. Flowchart of troubleshooting

• Failed wiring continuity

• Trouble of the control board

• Poor connection of connectors related to compressor (on the board and the compressor.)

• Failure in wiring connecting of the compressor

• Trouble of control board

• Trouble of compressor

3. Recheck after corrective measures

• After any measures are taken, unplug and plug power cord again to check that the compressor operates properly.

• If the compressor operates properly for more than 1 minute after power cord is plugged again, it is presumed that the cause of trouble is eliminated.

*If the cause of trouble cannot be eliminated,

E56 will be dis-

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

*If the control board has been replaced, E56 will not be dis-

played even though the cause 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 check that the compressor is operating for more than 3 minutes and each compartment is getting cooled.

start

The connector CN50G on the control board is properly connected?

The connector of compressor is properly connected?

Remove the CN50G connector on the control board, and measure the winding resistance on the compressor. , and (Point1). Is the resistance approx. DW&"

Measure the winding resistance of compressor between each terminal (Point 2). Is the resistance approx. 

DW&"

Is compressor being energized at startup?

Replace the compressor.

Connect it properly.

Replace

the

compressor.

Replace the lead wire assembly.

Replace the control board.

Replace the control P.C. board only when the error display keeps blinking even though all the above mentioned connectors are properly connected.

Check

Yes

Yes Yes

Yes

NoNo

Treatment

Compressor

Control board

Point+2 (to measure resistance)

Point+1 (to measure resistance)

For checking the connection to compressor

For checking the lead wire assembly to compressor

Lead wire assembly

CN50G

E57

Replace the control board.

Inverter drive module abnormality

Failure of the inverter drive module in the control P.C. board

Overcurrent is detected in the inverter drive module before starting the compressor, and the compressor does not start rotating.

OAH162

Poor cooling

Contact failure of connector. Connect it properly.

Poor defrosting

[5]

The refrigerator fan motor does not work

[6]

Yes

Yes (heats up)

Check the following and explain the result: half-open door, gap between gaskets, the amount of ice.

Replace the defrost heater-2 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°C or more.

Control board

CN9S

CN4A

CN3A

6-pin connector

Thermal fuse

1-pin connector

4-pin connector

6-pin connector

Drain pipe heater

Defrost heater-1

Defrost thermistor

Defrost heater-2

Check if the connector on the door switch is connected properly. If it is, replace the door switch.

Abnormal

Normal

Interior LED is not turned on and off.

Interior LED is turned on and off properly.

Door of refrigerator

compartment

Door of

versa

compartment

Door of ice

making

compartment

Door of freezer

compartment

Not rotating

continuity

Connect the connectors properly.

Continuity detected

Replace the refrigerator fan motor.

-pin connector

Refrigerator fan motor

CN9S

CN5D

Reed switch board 4

-pin connector

Versa compartment door switch

-pin connector

Freezer compartment door switch

-pin connector

Vegetable compartment door switch

Refrigerator compartment door switch

Ice making compartment door switch

Control board

Unplug and plug the power cord and check whether the refrigerator fan is rotating.

Check that there is continuity between thermal fuse and defrost heater-2.

Check the continuity by disconnecting the CN9S on the control board.

Compulsory defrosting

Short circuit

CN7M

Short-circuit the terminals and of the compulsory defrosting terminals (CN7M) on the control board to actuate the compulsory defrosting function and check whether the defrost heater is working properly. *1

Check the door switch for continuity.

• Open and close the refrigerator door

several times and check that the interior LED will be turned on and off (interior LED should get turned off when the door comes 10 mm close to the refrigerator body

• Close the refrigerator compartment door until the LED is turned off

. Open and close the ice making compartment

door

, and from the space of refrigerator compartment

door, check that the interior LED is turned on and off.

Perform the self check. Check whether any error is displayed.

Check whether the connector CN5D, CN9S on the control board and the 4-pin wire to wire connector for the fan motor on the ice making compartment are properly connected.

Yes

Note: Replace the fan grille as the refrig-

erator fan motor is integrated in it.

OAH162

Excessive cooling

Poor cooling

Vegetable compartment

[7]

Set the temperature to “Low”.

Set the temperature to “High”.

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

Yes

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

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

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

Yes

6-pin connector

Motor damper for versa copartment and vegetable compartment

6-pin connector

Operation P.C. board

Outside air thermistor TH1

CN4A

CN5D

CN9S

CN3A

Vegetable compartment heater

2-pin connector

6-pin connector

Vegetable compartment thermistor

Control board

Not frosted

Does the motor damper baffle, for versa compartment and vegetable compartment, in the fan grille open and close? (Wait 1 minute for self-check). (See “Self check method and its operation, Ice making test operation” on page 23.)

Connect the connector properly.

Disconnect CN5D and measure the resistances between

and ,

and between

and . Check that the winding of the motor damper for versa compartment and vegetable compartment has a resistance of approx. 415

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

Failure in the thermistor

Replace the vegetable compartment thermistor.

Check the vegetable compartment thermistor.

1. Dip the vegetable compartment thermistor into ice water with a temperature of 0 .

2. Remove the 4-pin connector stowed in the upper right front of the vegetable compartment.

3. Measure the resistance between the terminals and .

• Resistance at 0 : Approx. 6~7 k

Does the motor damper have a sign of frost?

Frosted

Repair the frosted part.

Replace the motor damper for versa compartment and vegetable compartment.

Normal

Yes

Is connector CN5D on the control board connected properly?

Normal

The set temperature can be adjusted on the operation panel.

Page 20.

Yes

Note: Replace the fan grille as the motor

damper for versa compartment and vegetable compartment is

integrated in it.

OAH162

only applies to versa compartment. Excessive cooling No cooling; poor cooling

Release the Power Save Mode.

Versa compartment, Ice making compartment

[8]

Yes

Refer to the section: “The refrigerator fan motor does not work” on page 36.

Not frosted

The baffles do not function

CN5D

CN9S

-pin connector

Versa compartment thermistor

Motor damper for versa compartment and vegetable compartment

-pin connector

Ice making compartment thermistor

Motor damper for chilled and ice making compartment

Control board

Only the food around cool air outlet is excessively cooled.

Does cool air come out of air outlet when opening the refrigerator-compartment door and attaching a magnet bar on the door switch? (See 1.)

After the ice making test operation, does the motor damper baffle for versa compartment, vegetable compartment or chilled and ice making compartment open and close? (Wait 1 minute for self-check.) (See “• Self-check and error display method and operation, Ice making test operation” on page 23.)

Connect the connector properly.

Disconnect CN5D and measure the resistance between and and between and . Disconnect CN5D and measure the resistance between 20 and 22 and between 24 and 26 . Winding resistance of the motor damper for versa compartment and vegetable compartment or that for chilled and ice making compartment: approx. 415 .

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

Refrigerator

compartment

Versa compartment

Ice making compartment

Attach a magnet bar here.

Failure in thermistor

Replace the versa compartment thermistor.

Check the versa compartment thermistor.

Dip the versa compartment thermistor into ice water (0°C), and disconnect the 6-pin connector in the back of the ice making compartment, and measure the resistance between the terminals (white) and (white).

• Resistance at 0 : Approx. 6~7 k

Failure in thermistor

Check the ice making compartment thermistor.

Dip the ice making compartment thermistor into the ice water (0

), and disconnect the 6-pin connector in the back of ice making compartment. Measure the resistance between terminals (white) and (white).

• Resistance at 0 : Approx. 6~7 k

Does the motor damper have a sign of frost?

Frosted

Repair the frosted part.

Replace the motor damper for versa compartment and vegetable compartment or that for chilled and ice making compartment.

Replace the fan grille as the motor damper is

integrated in it.

Normal

Yes

Are the connectors, CN5D and CN9S, on the control board connected properly?

Keep food away from air outlet when storing food.

Which operation mode is the versa compartment set to?

It is set to “ ”.

Which operation mode is versa compartment set to?

It is set to “ ”.

Yes

Normal

Replace the ice making compartment thermistor.

The set temperature can be adjusted on the operation panel.

Page 20.

Yes

Is the compartment set to Power Save Mode?

No Yes

Set the temperature to “Low”.

Is the temperature set to “Low”?

Set the temperature to “High”.

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

Is the temperature set to “High”?

OAH162

Component/

Part Name

Check Method and Criterion

Part Mounted

Position

5-6 TROUBLE CRITERION OF MAIN PARTS

Compressor

Motor protector

In the machine chamber at the rear side of the frame

Black Red

White

Contact point

In the machine chamber at the rear side of the frame

Measure the resistance with a tester.

Model TKA91E23DAH

Rated input W 33.7 (1620 rpm)

Starting current A 4.0

Running current A

0.78 (1620 rpm)

(For only 1 minute after startup)

Normal Abnormal (faulty)

Winding

(Black-White)

(White-Red) (Red-Black)

12.4

(20 )

Open ( )

short circuit (0 )

MR-B46Z-C

Water supply

pump motor

Motor damper for refrigerator compartment

Under the water tank holder in refrigerator compartment

In the lower back of the refrigerator compartment (The connector is in the left back of the refrigerator compartment.)

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

Model MM3-71CCV / KA-122-LATL00

Connected point

Open

100 ± 5 or more

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

Close 60 ± 10 or less

Normal Abnormal (faulty)

Less than 1

Open circuit (0 )

Normal Abnormal (faulty)

(Approx.)

Open ( ) or

short circuit

)

Normal Abnormal (faulty)

Winding Blue-White Red-Yellow

415

(Approx.)

Open ( ) or

short circuit

)

(

)

Red

Yellow

Blue White

Rated input W 0.5

OAH162

Component/

Part Name

Check Method and Criterion

Part Mounted

Position

Motor damper for chilled and

ice making compartment

Motor damper

for chilled compartment is for lower case.

In the fan grille for freezer compartment (The connector

is in the back of the ice making compartment.)

Measure the winding resistance.

Red

Yellow

Blue White

Motor damper for versa compartment and vegetable compartment

In the fan grille for freezer compartment (The connector

is in the back of the ice making compartment.)

Measure the winding resistance.

Normal Abnormal (faulty)

Winding Blue-White Red-Yellow

415

(Approx.)

Open ( ) or

short circuit

)

(

)

Normal Abnormal (faulty)

Winding Blue-White Red-Yellow

415

(Approx.)

Open ( ) or

short circuit

)

(

)

Rated input W 0.5

Rated input W 0.4

Red

Yellow

Blue White

Defrost heater-2 In the drip tray

under the evaporator of the freezer compartment.

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

Defrost heater-1

Embedded in the evaporator (Inside the aluminum pipes)

Rated input W 150

Operation method

The heater is energized while defrosting.

(Defrosting is finished when the evaporator is 14±1.5

or more.)

Rated input W 81

Operation method

The heater is energized while defrosting.

(Defrosting is finished when the evaporator is 14 ±

1.5

or more.)

Normal Abnormal (faulty)

149

(Approx.) Open circuit ( )

Normal Abnormal (faulty)

(Approx.) Open circuit ( )

OAH162

Component/

Part Name

Check Method and Criterion

Part Mounted

Position

Vegetable compartment heater

Water supply

pipe heater

At the bottom of

the vegetable compartment (inside polyurethane foam)

The connectors

are in the connector box on the ceiling of the vegetable compartment.

Under the mount-

ing position of water tank (inside polyurethane foam)

The connec-

tor is in the left back of the refrigerator compartment.

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

Rated input W 6.0

Operation method

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

Normal Abnormal (faulty)

2.0 k

(Approx.) Open circuit ( )

Rated input W 7.0

Operation method

The heater turns on with the energization rate adjusted according to each setting for the ice making, refrigerator and freezer compartment.

Normal Abnormal (faulty)

8.2 k

(Approx.) Open circuit ( )

Drain pipe heater

Near the bottom of the drip tray under the evaporator in the freezer compartment

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

Rated input W 7.0

Operation method

The heater is energized while defrosting.

(Defrosting is finished when the evaporator is 14±1.5

or more)

Normal Abnormal (faulty)

8.2 k

(Approx.) Open circuit ( )

OAH162

Component/

Part Name

Check Method and Criterion

Part 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 500 k •••••••••••••••••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 shown on the left.

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

Chilled Freezer

compartment Defrosting Versa

compartment Ice making

compartment Vegetable

compartment

Troubleshooting with self-check

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

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

• If there is a open circuit in the thermistor, there may be poor contact of the connector or a failure in the element of the thermistor.

(2) When the self-check indicates the

abnormality of the 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, and Freezer compartment thermistor

In the fan grille of each compartment

Vegetable compartment

In the back of partitions between Freezing and Vegetable compartments

Refrigerator compartment thermistor

On the back of the refrigerator control panel

Chilled

On the lower part of the refrigerator control panel

Outside air thermistor

In the operation P.C. board

Photosynthesis LED (2 pieces)

LED lighting duration

Always

Abnormal criterion

Means

Check with the diode range( ) of tester. (Use a tester equipped with diode range.)

The needle in the tester does not swing when measuring the resistance across the terminals 3 (+) and 1 (-) and the terminals 3 (+) and 2 (-) in the 5 pin wire to wire connector in the ceiling of the vegetable compartment. Make sure that the needle in the tester does not also swing after the polarities are reversed.

LEDs light in following colors at the above timing. Photosynthesis LED: Orange

LED Use a tester equipped with a diode range

Photosynthesis LED

Vegetable compartment LED

On the ceiling vegetable compartment (Vegetable compartment LED board)

OAH162

Component/

Part Name

Check Method and Criterion

Part Mounted

Position

Interior LED (12 V DC)

LED lighting duration

It lights up while the refrigerator compartment door is open. (If the door stays open for 60 minutes in a row, the LED automatically goes out. Once the door is closed, it will light up again next time the door is opened.)

Abnormal criterion

The LED does not turn on at the above timing.

On the ceiling of the refrigerator compartment (Interior LED control board)

Chilled heater

Normal Abnormal (faulty)

2.0 k

(Approx.) Open circuit ( )

Rated input W 6.0

Operation method

Under supercool chilling setting, the heater is energized while the temperature is at or below the setting temperature of the chilled thermistor.

Embedded in the floor of the refrigerant compartment (The connector is in the left back of the refrigerator compartment.)

Duct heater

Normal Abnormal (faulty)

8.6 k

(Approx.) Open circuit ( )

Rated input W 6.7

Operation method

The heater controls energization depending on the settings for the versa compartment, ambient temperature and how many times the door is opened.

In the return air course of the refrigerator compartment (inside the fan grille)

Water tank heater

Normal Abnormal (faulty)

4.0 k

(Approx.) Open circuit ( )

Rated input W 3.0

Operation method

The heater turns on with the energization rate adjusted according to each setting for the ice making, refrigerator and freezer compartment.

Under the mounting position of water tank (inside

polyurethane foam)

The connector

is in the left back of the refrigerator compartment.

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

OAH162

5-7 TEST POINT DIAGRAM OF CONTROL BOARD

CN5D

1— 11

Motor damper for versa compart-

ment, vegetable compartment

Motor damper for refrigerator

compartment

2 — 12 Interior LED on the ceiling 22

Motor damper for chilled, ice

making compartment

3 — 13 Power 13.3 V 23

Motor damper for refrigerator

compartment

4 — 14 GND 13.3 V 24

Motor damper for chilled, ice

making compartment

Motor damper for versa compart-

ment, vegetable compartment

15 Power 13.3 V 25 Vegetable compartment LED

6 — 16 GND 13.3 V 26

Motor damper for chilled, ice

making compartment

Motor damper for versa compart-

ment, vegetable compartment

Motor damper for refrigerator

compartment

27 —

8 Input of box fan motor control 18 Input of ice tray detecting switch 28 —

Motor damper for versa compart-

ment, vegetable compartment

Motor damper for refrigerator

compartment

29 —

Input of refrigerator fan motor

control

Motor damper for chilled, ice

making compartment

30 —

CN3A

1 Water tank heater3—5

Defrost heater-1

(for evaporator pipe)

Defrost heater-2

(for Glass tube heater)

Drain pipe heater

7 Vegetable compartment heater

9 Water supply pipe heater

Refrigerator compartment duct

heater

13 Chilled heater

5 V DC inverter

Between 4P (5 V) and CN89V(GND) on CN54W

CN50G

Compressor

1 U phase

3 V phase

5 W phase

CN4A

Motor protector

110 V AC COM

CN2A

Reactor

CN1A

1 110 V AC

110 V AC COM

5 Ground

CN7M

Compulsory defrosting

by short-circuiting

Inverter drive C89V (both sides)

12 to 20 V DC

Bus-bar 310 V DC

+ and – on DS91C

5 V DC (Control)

Between 5 D DC

and GND in the test

point diagram below

CN9S

Transmission of operation

panel data

16 Water supply pump 4.3 V

2 Power 5.0 V 17 —

Reception of operation panel

data

Refrigerator compartment

thermistor (back)

4 Box fan FG 19 —

Door switch input for refrigera-

tor compartment

20 —

6 Refrigerator fan motor FG 21

Ice maker thermopile (Thermistor)

Door switch input for freezer

compartment

Vegetable compartment ther-

mistor

Position-specifying switch ice

maker

23 Ice maker thermopile (Object)

Door switch input for ice mak-

ing compartment

24 Versa compartment thermistor

10 Ice maker motor 25 GND 5 V

Door switch input for versa

compartment

Freezer compartment thermis-

tor

12 Ice maker motor 27 —

Door switch input for vegeta-

ble compartment

28 Defrost thermistor

14 Water supply pump 29 Chilled thermistor

15 — 30

Ice making compartment thermistor

C92C

C91C

CN105

1 Power 13.3 V

2 GND 13.3 V

3 Power 5.0 V4—5—

The capacitors, C91C and C92C, for the bus bar are charged at a voltage of 310 V DC. The electric

charge remains for a while after the power cord is unplugged, so there is a risk of electric shock. Wait for

1 minute or longer after unplugging the power cord to allow the capacitors to discharge safely. After dis-

charging the capacitors, measure the voltage across the testing points on the bus bar and make sure that

the voltage is 10 V DC or less, and then conduct inspection and repairing.

Power source of drive circuit

Between 8 and 9 on IC9D

13.3 V DC

MR-B46Z-C

When the tempera-

ture of the defrost

thermistor is 14°C

or more, compulsory

defrosting does not

turn on.

OAH162

5-8 TROUBLESHOOTING FOR SUPERCOOL FREEZING OPERATION

Symptom/Problem Possible cause Explanation to the customer/Solution

“Supercool freezing” does not keep foods fresh.

“Supercool freezing” does not work.

Improper “supercool freezing” operation

• The amount of drip from meat and/or ﬁ sh is same as before.

• Meat is dried out.

• Potatoes become ﬂ oury.

• Vegetables lose their crispy texture.

• Bamboo shoots are stringy.

• Rice is not tasty.

• The versa compartment is not set to soft freezing.

• The icon for

or is not touched.

• Food was added to the compartment in the middle of the “supercool freezing” mode.

•

Food that had thawed out once was refrozen.

• Food is old or expired.

• Food put in the compartment is not hot although the compartment is set to “hot freezing”.

• Although hot food is put in the compartment, the compartment is not set to “hot freezing”.

• Set the versa compartment to the "soft freezing" mode. (Be sure to set the compartment to “supercool freezing” or “hot freezing”.)

• Be sure to touch the icon for “supercool freezing” or “hot freezing”.

• Food that was added to the compartment in the middle of the “supercool freezing” mode may not be supercooled.

• Refrozen food and old food occasionally cannot be supercool-frozen.

• Freeze food while the warm moisture in the food is preserved to keep it delicious.

Food does not freeze after one night.

Check the settings of the versa compartment.

• Yoghurt does not freeze.

• Meat and ﬁ sh do not freeze.

• Fresh jam does not freeze.

• The versa compartment is not set to the "soft freezing" mode.

• The compartment is set to “Low”.

• The compartment doors are opened and closed frequently.

•

The coagulating temperature of the food is low.

(e.g. processed food, such as soybean paste)

• Set the versa compartment to the "soft freezing" mode.

• Set the compartment to “High”.

• Open and close the compartment doors as infrequently as possible during the “supercool freezing” mode. Since this function freezes the food at a slow speed, it takes a long time to complete freezing.

• Food with a low coagulating temperature may not freeze in the “soft freezing” mode.

Food and drink freeze hard. (They are not maintained in the supercooled state.)

• Water in a plastic bottle freezes hard.

• Drinks freeze hard.

Supercooling: A state where water

remains liquid under 0°C.

• The user did not check the drink right after the displayed icon for

goes out.

•

“Supercool freezing” is a function which releases the item from the supercooling state and freezes it into the ﬁ ne particles. When the “supercool freez- ing” indicator goes out, supercooling is over.

•

It is difﬁ cult to make supercooled water in the

refrigerator. (It does not always work well.)

When the food is frozen, the state of food looks same as that frozen in the normal freezer.

Check the settings of the versa compartment.

• Ice crystals form on the surface.

• There is some frost.

• The versa compartment is not set to the "soft freezing" mode.

• The food is stored for a long time.

• The compartment doors are opened and closed frequently.

• Set the versa compartment to the "soft freezing" mode.

• The longer the food is stored, the more frost forms.

• Frequent door opening changes temperature inside the refrigerator. That causes frost formation.

Food in the versa compartment melts.

Check the settings of the versa compartment.

• The food is in contact with hot food.

• The compartment is not set to “hot freezing” when hot food is put in.

• Food with temperature that is more than

80 is in the compartment.

• The doors are not closed completely.

“Supercool freezing” is not available in the following operation

For 4 hours after the power is turned on

• Cooling for the whole refrigerator has priority over the “supercool freezing” mode.

When the temperatures in the other compartments rise to higher than a certain degree

• Cooling for the other compartments has priority over the “supercool freezing” mode.

When the temperature of the versa compartment is out of the speciﬁ ed temperature range for “soft freezing”

• Right after switching from other than “soft freezing” mode (The instruction manual mentions that “supercool freezing” should be started about 2 hours after switching to soft freezing.)

5-8.1 FAQ

Supercool freezing means “supercool freezing” and “hot freezing”.

OAH162

5-8.2 Failure diagnosis

Diagnosis made with food

Prepare two pouches of ready-meal-style curry. Freeze one in the freezer and supercool-freeze the other in the

versa compartment. Compare the texture of the ingredients, especially potatoes, in the curry.

Put a pouch of ready-meal-style curry in the versa compartment, and touch the icon for . Put the other pouch of ready-meal-style curry in the freezer.

Let the both pouches stay in there more than overnight.

Warm up and thaw the frozen curry and check the texture of potatoes.

If the potatoes in the supercooled curry maintains higher ﬁ rmness compared to the ones in the frozen curry,

the

“

supercool freezing” function has no problem.

Rear air outlet

Twin damper

1: Supercool freezing control

It is normal that the temperature rises after the supercool freezing is set.

The temperature in the versa compartment is, at least for 50 minutes, set to approximately 4°C lower than the temperature before supercool freezing is set.

freezing means “supercool freezing” and “hot freezing”.

OAH162

Temperature control

Compressor

Freezer compartment thermistor

Model NTC thermistor

Low (

)

-14.3/-17.1

(ON/OFF)

Middle (

)

-18.4/-21.1

(ON/OFF)

High (

)

-20.8/-23.5

(ON/OFF)

Motor damper

Refrigerator compartment thermistor

Model NTC thermistor

Low (

)

7.7/6.4

(Open/Close)

Middle ( )

4.8/3.5

(Open/Close)

High ( )

1.9/0.7

(Open/Close)

Chilled thermistor

Model NTC thermistor

( )

1.8/0.6

(OFF/ON)

Versa compartment thermistor

Model NTC thermistor

Soft freezing (Low)

( )

-5.3/-6.4

(Open/Close)

Soft freezing (Middle)

( )

-6.4/-7.7

(Open/Close)

Soft freezing (High)

( )

-8.3/-9.5

(Open/Close)

Freezer (Low) ( )

-15.1/-16.5

(Open/Close)

Freezer (Middle) ( )

-19.7/-21.2

(Open/Close)

Freezer (High) ( )

-23.4/-24.9

(Open/Close)

Ice making compartment thermistor

Model NTC thermistor

Ice making ( )

-17.1/-19.9

(Open/Close)

Ice making stop ( )

-17.1/-19.9

(Open/Close)

Vegetable compartment thermistor

Model NTC thermistor

Low (

)

11.1/9.7

(Open/Close)

Middle ( )

10.0/8.7

(Open/Close)

High ( )

9.0/7.7

(Open/Close)

Heater

Chilled thermistor

Model NTC thermistor

( )

-2.5/-3.7

(OFF/ON)

Vegetable compartment thermistor

Model NTC thermistor

Low (

)

7.7/6.4

(OFF/ON)

Middle (

)

6.7/5.4

(OFF/ON)

High (

)

5.8/4.5

(OFF/ON)

Ice maker thermopile temperature sensor (center hole)

When checking the detected temperature, attach vinyl tape over the temperature sensor so that the center hole is completely hidden.

*Viewed from the bottom with the ice tray removed.

1. Diagnostic procedure <Outline>

• In the “Thermistor check mode”, check the following: Response and Detected temperature. Response check: Make sure that the detected temperature changes by placing your hand under the sensor. Detected temperature check: Put the vinyl tape on the aperture of the thermopile, and check the detected temperature.

Accuracy of the temperature detected by the thermopile

• Since there is considerable individual variation in the temperature detected by the thermopile, the tolerance of the absolute temperature is relatively large. If no problem is found by the check , it is generally regarded as normal. If the check results in normal, it can be regarded as normal even if the detected temperature, found by the check , is slightly out of the normal range.

2. Diagnosis

1) Response check (1) Procedure Step 1: Start the “Thermistor check mode”. Step 2: Open the ice making compartment door and remove the ice tray. Step 3: Check that the detected temperature changes by placing your hand under the thermopile. (2) Failure diagnosis

• If the temperature does not rise 2 to 3 or more when your hand is introduced, the thermopile is broken. (However, if the inside of refrigerator is not cool enough, the temperature change cannot be observed.)

2) Procedure for Detected temperature check (1) Procedure Step 1: Open the ice making compartment door and remove the ice tray. Step 2: Cover the temperature sensor on the thermopile with vinyl tape. Step 3: Wait for about five minutes until the temperature of the ice making compartment becomes stable. Step 4: Start the “Thermistor check mode”. Step 5: Check the temperatures of the ice making thermistor and the ice maker thermopile. (2) Failure diagnosis

• If the temperature detected by the thermopile is roughly in the range of −5 to + 5 against the temperature of the versa com partment thermistor, which is listed in the temperature control chart ("ELECTRICAL SPECIFICATIONS" of "2. SPECIFICATIONS"), it is normal.

−12 / −25

Temperature detected by the thermopile It is normal if the detected temperature is in the range of +5 to −5

against the temper-

ature of the versa compartment thermistor.

5-8.3 Ice maker thermopile (ice maker sensor)

The ice maker thermopile is ﬁ xed on the ice maker with tape.

<Reference> MR-B46Z-C Temperature control chart

Vinyl tape must not cover the hole

OAH162

1.1 ± 0.2

9.5

max.

8.2 ± 0.3

4.2 ± 0.2

0.1 max. gap

14 ± 0.3

1 - VTobj )

Between 4 -2 VTamb (V)

Between 1 -2 VTamb (V)

)

4 - VTamb

3 - 5V

2 - GND

6.5 ± 0.2

11. 3

4.8

12.5 ± 0.3

8.15

4.2 ± 0.3

0.1 max. gap

9.15

2.5 max.

3. Outline and detected temperature of the thermopile

• 2 kinds of temperature information (voltage) are output from the thermopile. Vtamb: Temperature information about the thermopile itself ( ambient temperature) Vtobj: Temperature information about the object to be detected by the thermopile (infrared ray)

Each output changes between 0 V ~ 5 V.

Temperature information (voltage) about the object to be detected by the thermopile varies depending on the temperature of the thermopile itself. Even if the temperature of the object stays constant, the values of temperature information about the object (Vtobj) will be various if the temperature of the thermopile itself varies.

• The following chart shows rough standards of the output voltage of thermopile

Temperature Information about the object according to the ambient temperature (Vtobj: unit: V)

Each voltage value is a representative value as a guide. Values of Vtobj in the following chart are output when the object is placed under the entire field of view of the thermopile.

Temperature of

the object(

)

−20 −100 102030

Ambient temperature

( )

1.077 1.298 1.565 1.879 2.24 2.647 Vtamb(V)

−20 2.225 1.66 1.02 0.302 - -

−15 2.498 1.933 1.294 0.575 - -

−10 2.79 2.225 1.585 0.867 0.066 -

−5 3.1 2.535 1.896 1.177 0.376 -

0 3.43 2.865 2.225 1.507 0.706 -

5 3.779 3.214 2.574 1.856 1.055 0.168 Vtobj(V)

10 4.148 3.583 2.943 2.225 1.424 0.537

15 4.538 3.973 3.333 2.615 1.814 0.927

20 4.949 4.384 3.744 3.026 2.225 1.338

25 - 4.817 4.177 3.458 2.657 1.771

30 - - 4.631 3.913 3.112 2.225

E.g.) The object at about 5

is measured at the ambient temperature of –10 .

Vtamb: approx. 1.298 V, Vtobj: approx. 3.214 V

5.5

4.5

3.5

2.5

1.5

0.5

-30 -20 -10 0 10 20 30 40 50 60

VTobj/V

Temperature of the object

VTamb:1.08 V

VTamb:1.57 V

VTamb:2.65 V

VTamb:1.30 V

VTamb:1.88 V

5-8.4 Failure diagnosis for the thermopile

(for both versa compartment thermopile and ice maker thermopile)

OAH162

NAMES OF THE PARTS

MR-B46Z-C

Lid

Tank Cap

Ice Tray

Water Tank

(About 1.2L)

Ice Storage Box

Ice Tray Lock Lever

Soundproof Mat

Reduces the sound of dropping ice. Do not dispose of it.

Push in the water tank until it touches the rear side and confirm that the handle is aligned with the front of the lower case.

Lower Case

Ice Making

Compartment

Versa Compartment Case

Do not stack food higher than the case. Doing so may result in the door being unable to close, food melting, or food being damaged.

Aluminum Tray

The cold tray quickly cools the food.

Versa Compartment

Freezer Compartment

Freezer Case (Lower)

Freezer Case (Upper)

Vegetable Compartment

Vegetable Case (Upper)

Vegetable Case (Lower)

Refrigerator Compartment About 0°C to 6°C

Bottle Pocket

Store plastic or glass bottles.

Interior Light

Uses 6 LEDs.

Adjustable Pocket (Large)

Adjustable Pocket (Small)

Lower Case

Upper Case

Glass Shelf

The glass shelves are reversible.

Upper Case Cover

Air Outlet

If food with a high water content is placed near the air outlets, it may freeze. (Cans of beer, soda, etc., in particular, may burst when frozen.)

The adjustable pockets (Small) (Medium) can be changed to two heights, and the adjustable pocket (Large) to three heights.

Two-way flexishelf

Adjustable Pocket (Medium) (With Egg Shelf)

Operation panel

Sliding Cases

Upper Case

Lower Case

 Processed food such as sausage, ham and dairy products can be preserved.

 The temperature cannot be adjusted.  Do not store food that is easily frozen.

 Supercool Chilling can be set with .  Food will not freeze, even below the freezing point.  The freshness of meat and fish can be prolonged without freezing.

OAH162

OPERATING PROCEDURE PHOTOS

Glass shelf

Two-way flexishelf

Lower case

Upper case

Water tank

Ceiling of slide case

DISASSEMBLY INSTRUCTIONS

Before the power plug is removed from the socket, be sure to conduct a series of ice making test operations by touching the . Replace the parts after the power plug is removed. In the procedures 2, 3, 4, and 5, 3 kinds of screws and 2 kinds of rivets are used. Do not mistake one for another when installing them.

Rivet

4 12

Stainless steel

4 12 (Black)

With metal washer

Specified screw

(painted)

Rivet

After replacing the parts, plug in the power cable and touch the to perform the self-check and the operation check of the ice mak-

ing test.

MR-B46Z-C

Photo 1

1. Parts inside the refrigerator compartment: Glass shelf Two-way flexishelf (Front) (Back) Upper case cover Upper case Ceiling of slide cases Lower case

Partition for chilled compartment Partition for tank

(1) Lift the front of the shelf using both hands.

(2) Pull out to the front.

Swiftly pulling out the part to the front can damage the side

of the door. Pull out the part slowly to remove it.

(3) Lift the front of the shelf using both hands. (See figure 2.)

(4) Pull out to the front. (See figure 3.)

(5) Pull the shelf out to the front and match the protruding parts to

the grooved parts of the guide rails. (See figure 4.)

(6) Take the protruding parts off the grooved parts, and then hold

up and pull out the shelf to the front to remove it.(See figure 5.)

Figure 1

Swiftly pulling out the part to the front can damage the side

of the door. Pull out the part slowly to remove it.

(1)

(2)

(4)

(3)

Back Shelf

Figure 4

Figure 2

Figure 3

Figure 5

(5)

(6)

Match the protruding parts to the grooved parts of the guide rails.

Guide Rail

Glass shelf

Two-way flexishelf (Front) (Back)

Front Shelf

OAH162

OPERATING PROCEDURE PHOTOS

Upper case

Lower case

Ceiling of slide cases

Figure 6

(7) Lift the upper case cover. (See figure 6.)

(8) While pressing the end of the position indicated with

on the right, press the upper case cover to the left and warp it to remove. (See figure 6.)

(7)

(8)

Press the end of the position indicated with

Ceiling of slide case

Water tank

Upper case

Lower case

Partition for tank

Photo 2

Photo 3

Partition for chilled compartment

Upper case cover

(9) Fully pull out the upper case and lift the front of the upper case

until the bottom can be seen. (See figure 7.)

(

) While tilting the upper case to your side, pull it out.

(See figure 8.)

(

) Fully pull out the lower case. (See figure 9.)

(

) Lift the lower case out to the front. (See figure 9.)

(

) Pull out the ceiling of the slide compartment while pushing the

front tabs on both sides outward. (See photo 3.)

Pulling it forcefully may cause breakage of the tab.

(

) Remove the water tank.

Figure 9

(13)

(

)

(9)

Bottom

Upper case

(10)

Bottom

Figure 7

Figure 8

Control panel

Ta b

Refrigerant compartment

Upper case cover

OAH162

OPERATING PROCEDURE PHOTOS

Photo 5

Photo 4

Attach the partition for tank to the partition for chilled compart-

ment along the groove of it.

Attach the partition for chilled compartment together with the

partition for tank by inserting the convex parts of the partition for chilled compartment along the rails on the sides of the refrigerator compartment. Slide the partition for tank along the groove on the bottom of the refrigerator compartment while paying attention to the position of the tabs.

(See photo 5.)

(15) Disengage the tabs on the right and the left of the partition for

chilled compartment by lifting them up. (See photo 4.)

(

) Pull out the partition for chilled compartment together with the

partition for tank toward you, then lift them to remove them.

(See photo 4.)

(

) Pull out and remove the partition for tank along the groove of

the partition for chilled compartment.

Ta b

Partition for tank

Ta b

(16)

Ta b

Partition for chilled compartment

Rail

Groove

Tabs

Partition for tank

Partition for chilled compartment

Note:

Partition for chilled compartment Partition for tank

OAH162

OPERATING PROCEDURE PHOTOS

2. Parts inside the refrigerator compartment: Connector box

Screw cap Control panel, Duct R Interior

LED Cover of water supply pump motor Door switch for refrigerator compartment, ice making compartment and versa compartment.

(1) Remove the parts in the refrigerator compartment.

(4) As shown in the photo 11, hold the both right and left sides of

the control panel, and pull towards you.

Photo 12

To prevent poor contact of connectors, connect them properly.

Fix the control panel by inserting the lower tabs (2 places) into

the bottom of refrigerator compartment.

The following parts are integrated in the control panel: duct R, motor damper for refrigerator compartment, refrigerator compartment thermistor, chilled thermistor and damper cover.

(5) Remove the screw, and slide the interior LED toward back to

disengage from the center front tab and 4 tabs on left and right. Disconnect the connectors. (See photo 12.)

Do not pinch the lead wires and connector in the cover when

attaching it.

Ceiling of refrigerator compartment

Interior LED

Screw

Ta b

Tabs

Control panel Duct R

Caution on assembly

Interior LED

Caution on assembly

Photo 6

Photo 7

Photo 8

Photo 9

Photo 10

Photo 11

Control panel

Cover of water supply pump motor

Connector box

Screw cap

Screw caps

Screw

Connector box

Cover of water supply pump motor

Screw caps

(2) Remove the screw . Pull the connector box towards you

as shown in photo 8, and disconnect the 2 connectors that connect to the control panel, then remove the connector box. (See photos 7, 8.)

(3) Disengage the tabs beneath the lower parts of the screw

caps with a precision flat-blade screwdriver, and remove the 2 screws. (See photos 9, 10.)

Note:

OAH162

OPERATING PROCEDURE PHOTOS

Photo 13

Photo 14

(6) Remove the screw, and lift the cover of water supply pump

motor, then disconnect the connector. (See photo 13.)

(7) Cut the lead wires from the cover of the water supply pump

motor (See figure 10.), then pull up the lead wires to be removed from the cover of the water supply pump motor. (See photo 13.)

(8) Remove 2 screws inside the cover of the water supply pump motor,

then remove the water supply pump motor. (See photo 14.)

Air path

Water supply pipe

Screw

Cover of water supply pump motor

Connect the water supply pump motor for service with the con-

nector as shown in the figure 11.

When mounting the water supply pump motor for service,

attach 2 screws to the cover of the water supply pump motor.

Water supply pump motor

Cover of water supply pump motor

Screws

(9) Insert a flat-blade screwdriver between the refrigerator body

and the switch.

Figure 10

Cover of water supply pump motor

White Red

Mirror hinge

Lead wires cut in figure 10 (body side)

Mirror hinge

Backside connector

White

Red

Water supply pump motor (For replacement) Make sure to clear away any dust such as iron dust.

Figure 11

•

Securely fit the cover of the water supply pump motor so as not to form any clearance.

•

Enclose the lead wires neatly to prevent them from tangling in the groove.

Cover of water supply pump motor

Caution on installation

Door switch for refrigerator compartment, ice making compartment and versa compartment

Note:

OAH162

OPERATING PROCEDURE PHOTOS

Tabs

Ta b

Partition S

Partition I

Photo 16

Photo 17

Parts inside the ice making compartment, versa compart-

ment, vegetable compartment, and freezer compartment :

Partition I Partition S Packing (F) Partition I/S cover

Partition I/ S Cover (Ice maker) Ice tray lock lever Ice tray Automatic ice maker assembly Ice maker thermopile Cover (Upper) Fan grille Evaporator Defrost heater-2, Drip tray, Defrost thermistor

(1)

Remove interior parts out of ice making compartment, versa compartment, vegetable compartment, and freezer compartment.

(2) Pull out the doors of ice making compartment, versa compart-

ment, vegetable compartment, and freezer compartment.

(7) Remove the screw on the upper part of the partition I/S, and

disengage the tab on the lower right side. (See photo 18.) To prevent any deformation and damage to the pipe, gently hit the left side of the partition I/S, and slide it towards the right, then remove. (See photo 19.)

Deforming or damaging the partition I/S causes refrigerant

leakage or failure in cooling.

Do not deform or damage the pipe. (See photo 19.)

Deforming or damaging the pipe causes refrigerant leak-

age or failure in cooling.

Orient the arrow upward and install the partition I/S.

(See photo 17.)

(6) Remove 3 screws

, and 4 sliders on the front of the refrigerator compartment. Remove the tabs at the both sides of partition I/S cover. (Remove them with a driver or another tool which is wrapped in cloth in order to protect the cover surface from scratches.) (See photo 17.)

(3) Disengage 2 tabs and push up the bottom of the partition I to

remove it. (See photos 15, 16.)

(4) Disengage the tab on the left side and 3 front tabs, then push

up the bottom of the partition S to remove it. (See photos 15,

16.)

(5) To remove the packing F, slide it toward the back and disen-

gage the tabs. (See photo 16.)

Tabs Tabs

Photo 15

Freezer compartment viewed from the bottom.

Sliders

Partition I/ S cover

Ta b

Screw

Screws

Partition I Partition S

Arrow

Photo 19

Partition I/S

Pipe

Automatic ice maker assembly

Slide to the right.

Photo 18

Ta b

Pipe

Screw

Partition I/S

Packing (F)

Partition I/ S cover

Caution on assembly

Partition I/ S

Partition I

Partition S

Packing (F)

OAH162

OPERATING PROCEDURE PHOTOS

Photo 20

Photo 21

Figure 12

Figure 13

(8) Remove the screw and 2 connectors. (See photos 20, 21.)

(

) Turn the ice tray lock lever 45 degrees as shown in Figure 12.

Slide the lever to the right to remove it.

(

) Pull out the ice tray.

Slide to the right.

(11) Remove the water supply pipe from the refrigerator compart-

ment side.

(

) Insert your hand into the opening where the connector was

placed. (See photo 21.) While pushing the tab on the upper left side of the automatic ice maker downward, pull out the automatic ice maker toward you. (See photos 20, 21.)

(

) Remove seal tapes for lead wire fixing (3 places) and for ther-

mopile substrate waterproofing (1 place). (See Figure 13.)

Press to disengage a tab (1 place) on top of the cover of the

ice maker thermopile from behind (ice making tray side), and remove the ice maker thermopile. (See figure 14.)

Screw

The Ice maker thermopile is taped in place on the

body of the automatic ice maker.

Insert a hand.

Sealing tape for lead wires

Substrate waterproofing tape

Upper tab on ice maker thermopile cover

Ta b

Automatic ice maker assembly

Ice tray lock lever

Connectors

Ice tray

Connector

Figure 14

Ice tray lock lever

Cover (Ice maker)

Ice tray

Automatic ice maker assembly

Ice maker thermopile

OAH162

OPERATING PROCEDURE PHOTOS

Gray sponge

Photo 24

Figure 16

Hook the 2 lower tabs onto the ice maker and then fit the upper

tab into place. (See figure 15.)

Upper tab

Lower tabs

Figure 15

Route the lead wires as shown in Figure 13, and fix the lead wires with 2 strips of sealing tape. Apply the dedicated waterproof sealing tape over the thermopile substrate. (See figure 16.)

When attaching tape, beware that no gaps form between the

ice maker and the tape.

(

) Remove rivet (1 rivet) to remove the cover from the fan

grille. (See photo 22.)

(

) Remove the 3 screws on the lower right and left sides.

Disengage the 2 tabs at the bottom with a flat-blade screwdriver. (See photo 23.)

(

) Disconnect the 4 connectors in the connector area (indicated

in photo 22) on the upper left side of the fan grille, which are bundled with a gray sponge and connected to the fan grille.

(See photo 24.)

After removing the fan grille, attach the lead wire leading from

the inner liner onto the side of the refrigerator with a tape to protect the lead wire from getting wet with evaporator condensation.

The following parts are integrated in the fan grille:

motor damper for versa compartment and vegetable com-

partment, motor damper for chilled and ice making compartment, refrigerator fan motor, fan, thermal fuse, and 3 thermistors.

Photo 22

Rivet

Cover (upper)

Fan grille

Connector area

Photo 23

Fan grille

(The following parts are integrated in the fan

grille: motor damper for versa compartment and vegetable compartment, motor damper for chilled and ice making compartment, refrigerator fan motor, fan, thermal fuse, and 3 thermistors).

Tabs

Fan grille

Screw Screw

Screw

When attaching tape, beware that the tape does not cover the hole.

Caution on installation Ice maker thermopile

Cover (Upper)

Fan grille

Note:

OAH162

OPERATING PROCEDURE PHOTOS

Evaporator inlet pipe Black tube

Unit inlet pipe With marking

(17)

Remove the 4-pin connector that is stowed in the contoured

section of inner liner.

Detach the brazed section of piping. Remove the tab protrud-

ing from the inner liner to remove the evaporator. (See photo 25, figures 17, 18.)

Installation:

Attach the evaporator to the tab protruding from the inner

liner. (See figures 17, 18.)

Check both the entry side (black tube) and the exit side (gray

tube) of the evaporator. Braze the entry side to the pipe with black marking, leading from the inner liner; and the exit side to the other pipe.

Connect the connector leading from the evaporator to the con-

nector on the contoured section of inner liner. Stow the lead wires in the contoured section and cover it with seal tape.

Figure 18

Figure 17

Photo 25

The refrigerant flows in the muffler from top to bottom. The pipe from the evaporator exit leads to the top of the muffler. The pipe from the muffler (gray tube) leads to the no-marking unit outlet pipe.

Tab for fixing the evaporator

Tab for fixing the defrost heater

Pull the evaporator up in the direction of the arrow A to detach it from the tab. Slide the defrost heater out in the direction of the arrow B.

Evaporator

Tab for fixing the evaporator

Tab for fixing the defrost heater

Evaporator

When the piping around the muffler is stored, make sure

that there is no contact between the aluminum pipe and the copper pipe. (If they are in contact with each other, gas leakage may occur due to galvanic corrosion.)

Evaporator

Defrost heater-2

DEF thermistor

Defrost heater-1

Brazed section

Heater roof

Evaporator outlet pipe Gray tube

Unit outlet pipe No marking

Exit side Entry side

30 mm

Evaporator

OAH162

OPERATING PROCEDURE PHOTOS

Defrost heater-1

Defrost heater-2

Figure 19

Figure 20

Photo 26

Photo 27

Photo 28

Photo 29

(

) Detach the defrost heater-2 from the tab on the inner liner.

Slide the defrost heater-2 out towards you. Remove the defrost heater from the heater roof. (See figure 19.)Remove the strips of double sided tape on the drip tray, then the drip tray. (See figure 20.)

Installation:

Attach the drip tray so that it fits into the right place of the

inner liner. (See figure 20.)

Loosen the lead wires to prevent water from entering the

glass tube. Make sure the orientation of the defrost heater-2 is correct. (See figure 19.)

Attach the defrost heater-2 to the tab. Use the respective tabs

to secure the 2 lead wires on the left and right side of inner liner. (See photos 26, 27.)

Fix the lead wires to the inner liner with seal tape. (See photo

28.)

After connecting the connector (right) securely, stow the con-

nector in the contoured section of the inner liner. Cover the section with seal tape. (Use the seal tape provided with the defrost heater-2.)

Connect the defrost heater-2 connector (left), and stow the

connector in the cover of the fan grille.

Lead wire

Ta b

Put 4 pieces of seal tape on the positions indicated in the picture above.

Drip tray

Double sided tape (2 strips)

Fix the drip tray for service

with aluminum tape.

Remove the defrost heater-2 from the clips on the both ends of the heater roof. The arrow C indicates the front side of the refrigerator.

Defrost heater-2

Heater roof

Defrost heater-2

Defrost heater-1

Ta b

Lead wire

Defrost heater-2

Defrost thermistor connector (left)

Seal tape

Defrost heater-1

Defrost heater-2 connector (left)

Connector (right)

Stow the connector (right) in contoured section of inner liner and cover it with seal tape.

Defrost heater-2 Drip tray

OAH162

OPERATING PROCEDURE PHOTOS

Cut the nylon fastener.

Replacement defrost thermistor

Connect the housing.

Muffler

Nylon fastener (large)

Nylon fastener (small)

Replacement defrost thermistor

As the picture shows, attach the thermistor to the muffler on the side which does not face the evaporator.

Photo 30

Photo 31

Photo 32

Photo 33

Photo 34

(

)

Cut the nylon fastener and detach the defrost thermistor from

the evaporator. (See photo 30.)

The defrost thermistor and the evaporator pipe heater are

connected to the 4-pin connector. Cut the lead wires of the defrost thermistor at the base of the 4-pin connector.

(See photo 31.)

Installation:

Connect the replacement defrost thermistor to the evaporator

connector. (See photo 32.)

Secure the defrost thermistor to the muffler with 3 nylon fas-

teners (large) provided with the replacement defrost thermistor. Then, tie the lead wires of defrost thermistor and those of the evaporator pipe heater together with a nylon fastener (small). (See photos 33, 34.) (If they are attached to an incorrect position, thermal characteristics will be altered.)

After connecting the defrost thermistor connector securely,

stow the connector in the cover of the fan grille.(See photo

29.)

Defrost thermistor

OAH162

OPERATING PROCEDURE

PHOTOS

Photo 35

4. Ceiling of vegetable compartment

(1)Remove the 2 rivets and pull out the ceiling of the vegetable

compartment toward you. (See photo 35.)

(2) Remove the 2 screws. (See photo 36.)

Photo 36

Screw

Vegetable compartment LED

Vegetable compartment ceiling

Photo 37

5. Cover of operation panel Operation panel Removing Cover of operation panel

(1) Slightly open the refrigerator compartment door, and remove

the screw on the bottom of the door. (See photo 36.)

(2) Hold the cover of operation panel from the sides, and pull

downward. (If only the cover is removed, pull out the operation panel with a tool such as long-nose pliers.) (See photo 37.)

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

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

leading from the body. (See photo 39.)

Ceiling of vegetable compartment

Rivet

Vegetable compartment LED

Photo 38

Photo 39

Bottom view of refrigerator compartment door

Ice making compartment

Versa Compartment

Screw

Cover of operation panel

Connector

Vegetable compartment LED

Operation panel

Note:

OAH162

OPERATING PROCEDURE PHOTOS

6. Adjustable support cover

(1) Pull the left and right sides of the support covers to the front to

remove them.

(1) After adjusting the adjustable supports, install the adjustable

support cover by sliding back and forward.

Before installing the adjustable support cover, be sure to

adjust the adjustment.

Photo 40

Adjustable supports

Adjustable support cover

Photo 41

Ceilling

Screw

Elect cover

Screws

Photo 42

Ta b

Control board

Reactor

Ta b

CN4A : Connect the blue connector.

CN2A : Connect the white connector.

CN2A White

CN4A Blue

7. Elect cover Control board Reactor

(1) Remove 6 screws to fix the elect cover with on the back of the

elect cover and 3 screws on the ceiling. (See photo 41.)

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

To prevent pinching of the lead wires and poor insertion of the

connector, be sure to install the lead wires and connectors in

the specified positions.

(3) Disconnect the connectors and disengage both upper and

lower tabs.(See photo 42.)

Caution on installation

Elect cover

Control board

Reactor

Removing

Installing

OAH162

OPERATING PROCEDURE PHOTOS

Photo 43

Compressor cover Drain pan Box fan

(1) Remove the 8 screws for compressor cover on the back of the

refrigerator. (See photo 43.)

(2) Remove the screw. (See photo 44.)

Wash the drain pan with water when it is dirty.

In case water is accumulated in the drain pan, be careful not to

spill the water.

(3) Remove the drain pan while bending the pipes inside the drain

pan upward.

Avoid crushing the pipes.

(4)

Pull out the box fan by removing the fixing screw (See photo 45)

and the connector.

Route the wiring as shown in photo 46.

(5) Install the condenser in the reverse order of removal.

Bend the pipes in the drain pan downward as they were before

disassembly.

Provide a clearance of 10 - 15 mm between the piping and the

sides of the drain pan.

Photo 44

Photo 45

Photo 46

Screws

Compressor cover

Compressor

Box fan

Screws (Drain pan)

Drain pan

Connector Screw(Box fan)

Charge pipe

Compressor cover

Drain pan

Caution

Note:

Box fan

Note:

OAH162

FIGURES

Locked

COMP: TKA91E

Attach U washer as shown in the figure below.

BOX FAN ASSY

Charge pipe (Low pressure side)

U-washer

RUBBER MOUNT

Terminal cover

Dryer holder

Charge pipe (High pressure side)

Dryer

Avoid contact of the sumi tube with fire.

Make sure the pipes are reinstalled horizontally.

From the CABINET

PIPE to the DRYER

: This mark shows brazed point.

Figure A shows how the right-hand side of condenser pipe are properly installed.

Figure B shows how the left-hand side of condenser pipe is properly installed.

From the lower part

of condenser pipe

to the right-hand side

of condenser pipe.

From the right-hand

side of condenser pipe

to the cabinet pipe.

From the outlet of

condenser pipe

to the left-hand side

of condenser pipe.

From the left-hand

side of condenser pipe

to the lower part of

condenser pipe.

From the right-hand

side of condenser pipe

to the CABINET PIPE

Adjust piping and secure clearance of about 10 to 15 mm around pipes. Make sure clearance is secured especially between the following parts.  Between charge pipe and compressor cover, bottom pan, compressor, or discharge pipe.  Between suction pipe and compressor cover or capillary tube.  Between capillary tube and lead wires.  Between HOT PIPE FINAL ASSY and bottom pan.

Figure 21

(1) Pierce the charge pipes (high pressure side and low pressure side) using the piercing tool, and connect the increased

safety explosion-proof vacuum pump to the refrigerant circuit. Vacuum up the refrigerant and discharge it to the outside.

(2) Cut the discharge and the suction pipes using a pipe cutter. (Do not use fire to remove the compressor as refrigerant may

be remained in refrigerating oil.)

(3) Pinch the hole on the high pressure side charge pipe (dryer side) to close it. Attach the coupler to the suction pipe and

provide nitrogen purge. (Be sure to provide nitrogen purge and make sure that no refrigerant remains in the circuit using the gas leak alarm.)

(4) Remove the compressor. Heat the brazed parts of the dryer and the suction pipe and remove them.

Compressor

OAH162

Marking

[A] [C] [E] [G]

Right 0.5 Right 1.0 Left 0.5 Left 1.0

Marking

[B] [D] [F] [H]

Right 0.5 Right 1.0 Left 0.5 Left 1.0

( The part numbers of the slider sets shown are M20 WW1 803.)

Identifying slider sets (Marking)

LH RH Slider set A (0.5 mm to the right) A B Slider set B (1.0 mm to the right) C D Slider set C (0.5 mm to the left) E F Slider set D (1.0 mm to the left) G H

Door adjustment

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. When the refrigerator is installed in the corner of the room, the bolt of the refrigerator may sink into the floor and cause the refrig-

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

When the refrigerator bolt sinks into the floor, and it can be checked visually, prevent sinking by using objects like boards.

• Common elements First, check the installation condition.

Note:

The refrigerator weighs about 100 kg, and is held by 4 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.

Check points after adjustment

When adjustments such as hinge position have been made without food in the door pockets, check the door position again

with food stored inside.

When the refrigerator is moved to make adjustments in the back bolts, floor may be damaged due to objects trapped in the

caster. It is recommended to take preventive measures such as cleaning around the refrigerator and covering the floor with boards before moving the refrigerator.

After adjusting the refrigerator compartment door, check the open/close operation.

Condition

Adjusting doors horizontally

Adjusting vertical space between doors

Too much space Not enough space

A > B (More space in outer side) Or

A < B (More space in inner side)

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

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

Measures

Place spacer set under the outer slider of

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

Place spacer set under the inner slider of

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

Replace slider set of the right and left

versa compartment doors. a To adjust about 0.5 mm, replace with

slider set C.

b To make large adjustment, replace with

slider set D.

Replace lower slider set of the ice mak-

ing compartment door. c To adjust about 0.5 mm, replace with

slider set A.

d To make large adjustment, replace with

slider set B.

Replace slider set of the right and left

versa compartment doors. a To adjust about 0.5 mm, replace with

slider set A.

b To make large adjustment, replace with

slider set B.

Replace lower slider set of the ice mak-

ing compartment door. c To adjust about 0.5 mm, replace with

slider set C.

d To make large adjustment, replace with

slider set D.

OAH162

HEAD OFFICE: TOKYO BUILDING, 2-7-3, MARUNOUCHI, CHIYODA-KU, TOKYO 100-8310, JAPAN

Published: May 2016 No. OAH162 Made in Japan Specifications are subject to change without notice.

Mitsubishi Electric MR-B46Z-W-C, MR-B46Z-P-C Service Manual

Specifications and Main Features

Frequently Asked Questions

User Manual