SAMSUNG RT44MBSW Service Manual

Model :RT40MA / MB

RT44MA / MB

REFRIGERATOR CONTENTS

1. Product Specifications

2. Safety Warnings

3. Specifications of Electric Components

4. Electric Circuit Diagram

5. External Size and Designations

6. Refrigeration Cycle and Cool Air Circulation

7. Circuit Operation Theory

8. Troubleshooting

9. Exploded View and Part List

10. Disassembly of Freezing Compartment

11. Disassembly of Refrigerating Compartment

1. Product Specifications

ITEM

Model name

SPECIFICATION

Freezer

Refrigerator

Total

RT40MA/MB

RT44MA/MB

87(3.1) 87(3.1)

260(9.2) 282(10.0)

347(12.3)

110~115V/60Hz, 127V/60Hz, 220V/5~60Hz, 230~240V/50

290W/310W

forced convection

HFC-134a

150g

4 STAR

369(13.1)

670x640x1660

(670)

670x640x1730

(670)

59/69(kg) 63/73(kg)

Vailable

Capacity(cu.ft)

Net Dimension

(WidthxDepthxHeight)

Rated Voltage & frequency

Rated Power Defrost, Heater

Type of Refrigerator

Refrigerant

Refrigerant Mass Freezing Capicity

Weight (Net/Gross)

[CFC-FREE]

2. Safety warnings

Read all instructions before using this appliance in order to avoid risk of accident or possible damage.

W arning/Caution

Description of symbols

Indicates prohibition Do not disassemble Do not contact Follow Adhere the instruction strictly

Unplug from the electrical outlet Earth the appliance to avoid the

risk of an electric shock

Do not plug multiple electrical appliances into the same outlet.

• This may cause abnormal heating or a fire hazard.

Do not attempt to make repairs yourself.

• This could lead to fire hazard or abnormal operation causing severe personal injury .

Make sure the power cord is not crushed or damaged.

• Repair immediately all power cords or outlets that have become frayed or otherwise damaged.

Check the operating environment.

• Do not install the refrigerator in a humid (with condensation) location or on an unstable surface.

Be sure the earth.

• If earthing is not done, it will cause breakdown & electric shock.

Pull the power plug out for exchanging electrical equipment.

• It may cause electric shock.

Warning

This symbol is intended to alert the user to the possible death or injury.

Caution

This symbol is intended to alert the user to the possible injury or damage.

Warning

Prohibition Do not disassemble

Earth Unplug

Caution

Do not put bottles or kinds of glass in the freezer.

• Freezing of the contents may inflict a wound.

Do not store narrow and lengthy bottles or foods in a small multi-purpose room.

• It may hurt you when refrigerator door is opened and closed resulting in falling stuff down.

Do not store pharmaceutical products, scientific materials, etc, in the refrigerator.

• The products which cotrolled by temperature shall not be stored in the refrigerator.

Do not store articles on the product.

• Opening or closing the door may throw down which may

inflict a wound.

Use the rated components on the replacement.

• Check the correct model, rated voltage, rated correct, operating temperature and so on.

On repair, make sure that the wires such as harness should be bundled tightly .

• Bundle tightly wires in order not to be detached by the external force and then not to be wet.

On repair, remove completely dust or other things of housing parts, harness parts, and check parts.

• Cleaning may prevent the possible fire by tracking or short

After repair, check the assembled state of components.

• It must be in the same assembled state when compared with the state before disassembly .

Check if there is any trace indicating the permeation of water.

• If there is that kind of trace, change related components or do the necessary treatment such as taping using the insulating tape.

Prohibition

Prohibition Prohibition

Rated

components

1 Base Tray Ice 1 Case Tray Ice

1 Shelf Freezer

1 Vegetable Partition

1 Case Chilled Room

2 Shelf Refrigerator

1 Cover Vegetable

1 Case Vegetable

ITEM

Model name

Type

Power Source

SPECIFICATION

Freezer

Refrigerator

Total

Width

Depth(MA)

Height

Net weight (Kg)

Refrigerant

Temperature Control

Defrosting

Cabinet

Door

Storage

Accessory

Parts

Inside

Storage

Angle Adjustment

Movable Caster

Interior Lamp

Liner/Door Panel

RT40MA/MB

RT44MA/MB

87 87

260 282

347/12.3 369/13.1

670

640(670)

17301660

59 63

R134a (150g)

Dial (Resistance)

Automatic (Start-Finish by PCB)

Cyclo-Pentane Cyclo-Pentane

ABS (SD-0150)

2 Guard-Freezer

1 Guard-Egg,1 Guard-Bottle

2 Guard-Variety 1 Guard-Jumbo

Refrigerator (Freezer)

2 (Rear)

2 Legs (front)

2-Door Freezer/Refrigerator

AC110~115V/60Hz, 127V/60Hz

220V/50~60Hz, 230~240V/50Hz

3. Specifications of Electric Components

Net Capacity

(

ℓℓ

/cu.ft)

Net Dimension

(mm)

Foam

insulation

[CFC-FREE]

ITEM

Model

Power source

STANDARD(MECHANICAL TYPE)

Evaporator Condenser

Dryer

Capillary tube

Resistor Heater

Heater-defrost

Lamp

Door-Switch

Earth screw

Model

Starting type

Oil charge

Compressor

Refrigerator

Thermal fuse

Model

Thermostat

Bimetal

(OFF/ON)

Defrost-thermo

PTC-relay

Capacitor

Overload protector

Type

Defrosting

Interval

Model

Resistance

Close temp.

Open temp.

Running

Defrost-timer

Refrigeration Cycle

Electrical

R.S.C.R

110~115V/60Hz

UK162C-L1U/T3

127V/60Hz

UK162P-L1U/T3

220V/50~60Hz

SK182H-L2U/E02

FREOL α–15c / 200cc

Fin type

Natural convection type

Molecular sieve (XH-9, 13g)

ID 0.75 x L3400 (mm)

PFN-174S-05F (ON:5.5

˚C±

1.5˚COFF:+3.0

˚C±

1.5˚C)

250V/0.5A, 125V/1.5A

BSBN(Brass screw)

Rating Voltage/Ampere

Open temperature

Rating Voltage/Ampere

Open temperature

TMDE714F1

AC 250V / 5A

ON:-5±3˚C/OFF:12±3˚C

AC 250V / 10A

77±10˚C

TD-20CSA

69±9˚C

120±5˚C

250VAC/12

µF

69±9˚C

125±5˚C

350VAC/5.0

µF

J531Q33E100M 200-2

10Ω-2PIN

6hr 40min(60Hz)/8hr(50Hz)

12Min

J531Q34E220M350-2

22Ω-2PIN

4TM419

NHBYY-53

4TM308

PHBYY-53

MORS 1.2W

290W/45Ω 290W/167Ω

220V~240V/15W

RT40/44MA/MB

[CFC-FREE]

ITEM

Model

Power source

STANDARD(SEMI ELECTRIC TYPE)

Evaporator Condenser

Dryer

Capillary tube

Heater-defrost

Lamp

Door-Switch

Earth screw

Model

Starting type

Oil charge

Compressor

Sensor

Thermal fuse

Model

Sensor

Defrost-sensor

PTC-relay

Capacitor

Overload protector

Model

Resistance

Close temp.

Open temp.

Running

Refrigeration Cycle

Electrical

R.S.C.R

220V/50Hz

230~240V/50Hz

MK172QL1U/E01

FREOL α–15c / 200cc

Fin type

Natural convection type

Molecular sieve (XH-9, 13g)

ID 0.75 x L3400 (mm)

502AT

Rating Voltage/Ampere

Open temperature

Rating Voltage/Ampere

Open temperature

DC 5V

ON:-5˚C±3˚C/OFF:+15˚C

AC 250V / 10A

77˚C±10˚C

J531Q35E330M385-2

33Ω-2PIN

69±9˚C

135±5˚C

350VAC/5.0

µF

4TM232SHBYY-53

290W/167Ω 310W/170Ω

220V~240V/15W

250V/0.5A, 125V/1.5A

BSBN(Brass screw)

RT40/44MA/MB

4. Electric Circuit Diagram

●

Semi Electric Control Type

SUB PCB

MAIN PCB

CN01

R ROOM-SENSOR

EXT-SENSOR

EVAP-SENSOR

SK/BLU

RUNNING

CAPACITOR

P.T.C RELAY

PINK

SK/BLU

PINK

COMPRESSOR

RED

WHT

THERMAL FUSE

DEFROST HEATER

FAN MOTOR

PINK

WHT

R/LAMP

GRY

DOOR SWITCH

RED

N L

COMPRESSOR

"B-2"

“A-2"

“A-1"

GRY

F/LAMP

WHT/BLK

RED

OVERLOAD PROTECTOR

YEL

WHT

GRY

BRN

RED

WHT

GRY

BRN

CN02

CN01

“A-1" “B-1" : WITHOUT EARTH “A-2" “B-2" : WITH EARTH “C" : WITH F/LAMP

GRY-GRAY RED-RED BRN-BROWN YEL-YELLOW WHT/BLK-WHITE/BLACK PINK-PINK WHT-WHITE SK/BLU-SKY BLUE E-EARTH

“C"

[220V/50Hz, 230~240V/50Hz]-RT40/44

●

Mechanical Type

YEL

WHT

BRN

BIMETAL

DEFROST TIMER

RUNNING CAPACITOR

P.T.C RELAY

COMPRESSOR

OVERLOAD PROTECTOR

WHT

BRN R-THERMP

R-HEATER

R/LAMP

GRY

W/BLK RED

RED

PNK

S/BLU

PNK

235

RED

GRY- GRAY RED- RED BRN- BROWN YEL- YELLOW S/BLU- SKY BLUE

PNK- PINK BLK- BLACK WHT- WHITE W/BLK- WHITE/BLACK

FAN MOTOR

COMP. COOLING MOTOR

DOOR-S/W

F.M

S/BLU

C.M

RED

“A-1"

“A-2"

“B-2"

“A-1" “B-1" : WITHOUT EARTH “A-2" “B-2" : WITH EARTH

“B-1"

RED

WHT PNK

THERMAL FUSE

DEFROST HEATER

[110~115V/ 60Hz, 127V/60Hz, 220V/50~60Hz]-RT40/44

5-1) Product Dimension

670

548.5

80.5

1250.5

454.1

MODEL RT40MA/MB RT44MA/MB

1660 1730

1103.5

1173.5

549.5

640(670) 640(670)

Remark

( )BAR TYPE

5. Extemal size and Designations

T o remove shelves in the freezing compartment

• Frist remove the icemaking molds. Tilt the shell up at front, then lift it up and pull it out of the tracks.

To remove bio deodorizer

• While pushing the front end knob of the bio deodorizer, pull it downward to disengage.

T o remove shelves in the refrigerating compartment

• Hold the shelf by the front and pull it forward of the rack.

To remove shelves in the chilled compartment

Disassemble

Reassemble

• Lift up the cover, push the cover to the right (as shown) until the mounting hook(①) disengages, then disengage the other mounting hook (②) and pull out the cover.

• Pull the shelf forward until it stops. then lift it up and pull it out.

• With shelf front raised slightly, engage, the roller between the rails and slide it back.

• To repace the cover, first engage the mounting hook (①) as shown, then engage the other hook (②) and push in.

To remove door bins

• While pushing the bin to the left, lift it up to disengage.

To remove storage drawers and covers

• Lift up to remove the cover.

Pull the drawer helf way out, then lifting it up, pull it out completely.

5-2) Identifying and disassembling the parts

6. Schematic diagram of coolant gas circulation

COMPRESSOR → PIPE IMMERGE → PIPE SUB CONDENSER → PIPE CLUSTER → PIPE HOT → DRYER→ CAPILLARY TUBE → EVAPORATOR → ACCUMULATOR → PIPE SUCTION → COMPRESSOR

6-1) Refrigeration Cycle

6-2) Cool Air Circulation

• Cold air generated from the cooling system is distributed to the freezing compartment and the refrigerating compartment by the air circulation fan.

• In the freezing compartment, cold air is distributed to the compartment as well as to the shelves from the cold air exhaust port, food is frozen in the freezing compartment by cold air shower.

• Cold air that comes out of the

freezing compartment is absorbed back to the lower part of the cooling system through the suction port on the median divider.

• In the refrigerating compartment, cold air is distributed to the duct cover through the median divider. Cold air supplied to the duct cover passes through the refrigerating compartment.

• After cooling the refrigerating

compartment, cold air is absorbed to the lower part of the cooling system through the suction port on the median divider.

Rotating blade

7. Circuit operation theory

1. Temperature Control and Operational Description of Other Functions

1. Temperature Control Part Design

2. Temperature Control Function

1)Selecting Freezer Temperature

Selecting “Quick cooling~Quick freezing”is possible with turning temperature control knob.

Controlled temperature of each temperature control knob position is as follows:

Knob Position

Controlled

Temperature

-15±1

Normal

-19.0

-21±1 -23±1

2)Selecting Refrigerator Temperature

Selecting ① ~ ⑧ is possible with turning temperature control knob.

Controled temperature of each temperature control knob position is as follows:

3. Defrosting Function

1)Defrosting is decided by the accumulated time of comp on.

2)Defrosting proceeds in order of heating → recess time.

3)The first defrosting function after the initial power on starts with 4 hours of accumulated time of comp on, and then it repeats its function at every 8th hour of comp on.

4)In the process, controlling of defrosting heater ON/OFF is done by EVA-SENSOR. When the quality of EVA-SENSOR is poor (short/open) defrosting will be terminated only after recess time function without heating.

5)In the process, comp and fan maintain ON condition, after defrosting heating it operates with 10 min. recess time.

6)defrosting heating point ON and OFF operates by EVA-SENSOR and each temperature is as follows:

Caution) As this controller is by the ROTARY S/W, in case it is off the position, it is set to step 4 automatically.

Knob Position

Controlled

Temperature

①

6.0

➁

4.5

➂

3.0

➃

2.0

➄

1.0

➅

0.0

➆

-1.0

Freezer Temperature Controller

Refrigerator Temperature Controller

Heater On Point

below -5℃

Heater Off Point

15℃

Remark

Quick cooling Quick Freezing Winter

4. Testing Function

This function is for PCB and test of products, work process test, and SVC.

After checking the product's function by selecting TEST S/W, let the self-diagnosis function

start with the POWER OFF and ON.

1)Forced Starting Function

COMP and FAN starts immediately after the TEST S/W on the Main PCB is pressed once. So

when the forced staring function is done right at the COMP OFF point, Over Load in the COMP may be caused. Extra caution is necessary.

When forced starting function is selected, COMP and FAN run for 24 hours regardless of the

freezer/refrigerator temperature and knob selection. Indicating Lamp on main PCB shows that it is a forced starting function by 0.5sec interval ON/OFF.

When a selected forced starting function is selected and maintains for 24 hours, defrosting

function starts its operation, and when defrosting is completed normal operation is carried out according to the temperature selection knob position.

To release it's operation during forced starting, power should be turned off and turned on

again or test release mode on 3) below should be selected.

2)Forced Defrosting Function

If test switch is pressed once more during forced starting function, it is released immediately and forced defrosting function starts, and the Lamp on main PCB shows that it's forced defrosting by 1.0 sec. interval ON/OFF.

When forced defrosting is selected COMP and FAN is turned off immediately, and defrosting

heater is turned on at the same time. At this moment if the sensed temperature of EVASENSOR is higher than -5.0℃, defrosting heater is not turned ON and operates only for recess time and returns to normal operation.

When Heating is completed it recesses for 10 mints. and after that indicating Lamp remains

ON and returns to normal operation.

3)Test Function Release Mode If TEST S/W is pressed once more when forced defrosting function is carried out, forced defrosting is released and stops for 10 mints. and after that it returns to normal operation.

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