SAMSUNG SR-44 Service Manual

Model :SR-40RMB

SR-44RMB

FEB, 2000

For request : [e-mail]

Samsung Electronics 1

1. Product Specifications

ITEM

Model name

SPECIFICATION

Freezer

Refrigerator

Total

SR 40(NMA)/NMB/RMB

SR 44(NMA)/NMB/RMB

92(3.3) 92(3.3)

252(8.9) 284(10.0)

344(12.2)

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

290W

forced convection

HFC-134a

160g

4 STAR

376(13.3)

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 Samsung Electronics

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

Samsung Electronics 3

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 Prohibition

Rated

component

4 Samsung Electronics

1 Base Tray Ice
1 Case Tray Ice

1Shelf Freezer

1 Case Chilled Room

2 Shelf Refrigerator

1 Cover Vegetable

1 Case Vegetable

1 Vegetable Partition

ITEM

Model name

Type

Power Source

SPECIFICATION

Freezer

Refrigerator

Total

Width

Depth(NMA)

Height

Net weight (Kg)

Refrigerant

Temperature Control

Defrosting

Cabinet

Door

Door

Storage

Accessory

Parts

Inside

Storage

Angle Adjustment

Movable Caster

Interior Lamp

Liner/Door Panel

SR 40NMA/NMB/RMB

SR 44NMA/NMB/RMB

92 92

252 284

344/12.2 376/13.3

670

640(670)

17301660

53 54

R134a (160g)

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

(

§§⁄⁄

/cu.ft)

Net Dimension

(mm)

Foam

insulation

[CFC-FREE]

Samsung Electronics 5

[CFC-FREE]

ITEM

Model

Power source

STANDARD

Evaporator
Condenser

Dryer

Capillary tube

Resistor Heater

Heater-defrost

Lamp

Door-Switch

Earth screw

Model

Starting type

Oil charge

Compressor

R-SENSOR

Thermal fuse

Defrost-Sensor

Model

Resistance

Starting-relay

Running

Capacitor

Close temp.
Open temp.

Model

Overload

protector

Refrigeration Cycle

Electrical

R.S.C.R

110~115V/60Hz

UK162C-L1U/T3

127V/60Hz

UK162P-L1U/T3

230~240V/50Hz

SK170Q-L1U/T3

220V/50~60Hz

SK170H-L1U/T3

FREOL ¥Æ–15c / 264cc

Fin type

Natural convection type

Molecular sieve (XH-9, 13g)

ID 0.75 x L3400 (mm)

502AT
502AT

250V/0.5A, 125V/1.5A

BSBN(Brass screw)

Rating Voltage/Ampere

Open temperature

AC 250V / 10A

72¡ 4˚C

J531Q33E100M 200-2

10Ω-20PIN

33Ω-2PIN

4TM419

NHBYY-53

4TM2935

HBYY-53

4TM265

RFBYY-53

250VAC/12µF

250VAC/12µF 350VAC/5.0µF 350VAC/5.0µF

MORS 3W

290W/ 45Ω 290W/ 55Ω

110V~130V/15w

220V~240V/15W

290W/ 167Ω

290W/ 198Ω

69¡ 9˚C

125¡ 5˚C

120¡ 5˚C

125¡ 5˚C

69¡ 9˚C

69¡ 9˚C

69¡ 9˚C

130¡ 5˚C

SR40/44NMA/NMB/RMB

J531Q34E220M350-2

J531Q35E330M385-2

6 Samsung Electronics

4. Electric Circuit Diagram

GRY – GRAY
RED – RED
BRN – BROWN
YEL – YELLOW
S/BLU – SKY BLUE
PNK – PINK
BLK – BLACK
WHT – WHITE
W/BLK –

WHITE/BLACK

ORG – ORANGE
PRP – PURPLE

GRY – GRAY
RED – RED
BRN – BROWN
YEL – YELLOW
S/BLU – SKY BLUE
PNK – PINK
BLK – BLACK
WHT – WHITE
W/BLK –

WHITE/BLACK

ORG – ORANGE
PRP – PURPLE

[ 110~115V/ 60Hz, 127V/60Hz, 220V/50~60Hz, 230~240V/50Hz]-SR40/44

Samsung Electronics 7

5-1) Product Dimension

670

60

9

B

A

548.5

50

15

C

D

80.5

1250.5

454.1

MODEL
SR40NMA/NMB/RMB
SR44NMA/NMB/RMB

A

1660
1730

B

1103.5

1173.5

C

549.5

549.5

D

640(670)
640(670)

Remark

SR-34
SR-30

5. Extemal size and Designations

8 Samsung Electronics

1

2

2

1

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.

covers

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(¤ )
disengages, then disengage
the other mounting hook (¤Ł)
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
(¤ ) as shown, then engage
the other hook (¤Ł) 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

Samsung Electronics 9

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

10 Samsung Electronics

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

Samsung Electronics 11

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

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Selecting ¡ Quick cooling~Quick freezing¡–is possible with turning temperature control knob.

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

Knob Position

Controlled

Temperature

-16.0 -17.5

Normal

-19.0

-20.0 -21.0 -22.0

2)Selecting Refrigerator Temperature

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Selecting ¤ ~ ¤ is possible with turning temperature control knob.

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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

7.5

➁

6.0

➂

4.5

➃

3.0

➄

2.0

➅

1.0

➆

0.0

⑧

-1.0

Freezer Temperature Controller

Refrigerator Temperature Controller

Heater On Point

below -5¡

Heater Off Point

15¡

Remark

Quick cooling Quick Freezing

12 Samsung Electronics

4. Testing Function

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

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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

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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.

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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.

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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.

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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

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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.

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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.

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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.