Samsung SG648, SG688, SG606, BG606, BG60 Troubleshooting

9. Failure diagnosis and repairment

Main PCB check

• Turn the power off and on again for self diagnosis check.

• Refer to belows for error code table
♦ Error code table

Item

Refrigerator

Freezer

CONTROL BOX

Display “LOW”

Room Temp s

F Sensor

F Defro. Sensor

R1 Sensor

R Defro. Sensor

R1 sensor

e n s o r

Room TEMP-Sensor

R2 Sensor

“LOW.Mid”

R2 sensor

F sensor

Freezer

Refrigerator

♦ Table for Vf and Rth according to temperature

T(˚C)

-35

-34

-33

-32

-31

-30

-29

-28

-27

-26

-25

-24

-23

-22

-21

-20

-19

R(ohm)

68648
65011
61595
58384
55366
52526
49854
47337
44967
42733
40626
38640
36765
34995
33323
31743
30250

V(v)

4.364

4.333

4.301

4.268

4.235

4.200

4.164

4.127

4.090

4.051

4.012

3.972

3.930

3.888

3.845

3.802

3.757

T(˚C)

-18

-17

-16

-15

-14

-13

-12

-11

-10

-9

-8

-7

-6

-5

-4

-3

-2

R(ohm)

28838
27502
26237
25040
23906
22832
21814
20848
19932
19062
18237
17453
16709
16001
15328
14688
14080

V(v)

3.712

3.666

3.620

3.573

3.525

3.477

3.428

3.379

3.329

3.279

3.229

3.178

3.127

3.076

3.025

2.974

2.923

“Mid”

R Defro.

s e n s o r

F Defro. sensor

T(˚C)

R(ohm)

-1

14051

0

12949

1

12424

2

11924

3

11447

4

10993

5

10559

6

10146

7

9752

8

9375

9

9016

10

8673

11

8345

12

8032

13

7732

14

7446

15

7172

“ M i d . H I G H ”

–
–

V(v)

2.872

2.821

2.770

2.719

2.668

2.618

2.567

2.518

2.468

2.419

2.370

2.322

2.274

2.227

2.180

2.134

2.088

T(˚C)

“LOW”

Swing fan motor

–

R(ohm)

16

6910

17

6659

18

6420

19

6190

20

5970

21

5759

22

5557

23

5363

24

5178

25

5000

26

4829

27

4665

28

4508

29

4357

30

4212

V(v)

2.043

1.998

1.954

1.911

1.869

1.828

1.786

1.745

1.705

1.666

1.628

1.590

1.553

1.517

1.481

20 Samsung Electronics

Check in advance

1. Check the power of consent and power code.

2. Check it based on the “References” on the next pages.

9-1 No Input Power

N

Y

Y

N

N

Y

Y

N

N

Y

Y

Y

Samsung Electronics 21

9-2 Self diagnosis failure

1) Outer temperature sensor failure

Start

Is main PCB connection

(CON 5) O.K. ?

Y

Is outertemp sensor O.K.

Y

Is input vltg of CON 05

pin2 O.K.

Change main PCB ass’ y

N

N

N

2) R1, R2, refrigerator temp. sensor failure

Start

Is temp. sensor O.K. ?

N

Connection failure

Change sensor

Wire open

Y

Is main PCB connection

(CON02) O.K. ?

Y

Is input vltg of CON 02

pin1,2 O.K.

Y

Is input vltg of CON 02

pin1,2 O.K.

Y

Change main PCB ass’ y

N

N

N

Change sensor

Connection failure

Connection between sensors open

Wire open

22 Samsung Electronics

3) Refrigerator’ s defrosting sensor failure

Start

Is main PCB connection

(CON 5) O.K. ?

Y

Is defrosting sensor O.K.

Y

Is connection of defrosting

sensor O.K.

Y

Is input vltg of CON 03

pin4 O.K.

Y

Change main PCB ass’ y

4) F1, Freezer temp. sensor failure

N

Connection failure

N

Change sensor

N

Connection failure

N

Wire open

Start

Is main PCB connection

(CON03) O.K. ?

Y

Is temp. sensor O.K.

Y

Is connection of temp.

sensor O.K.

Y

Is input vltg of CON 03

pin1 O.K.

Y

Change main PCB ass’ y

N

Connection failure

N

Change sensor

N

Connection failure

N

Wire open

Samsung Electronics 23