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.

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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.

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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

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+ 46 hidden pages

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

Specifications and Main Features

Frequently Asked Questions

User Manual