Daewoo FR-551NT, Fr-521nt Service Manual

S/M No. : FR521NT010

Service Manual

Refrigerator

Model :

FR-521NT/551NT FR-521NB/551NB

DAEWOO ELECTRONICS CO., LTD

http : //svc.dwe.co.kr

Nov. 1999

SAFETY AND PRECAUTIONS

1) For starters, be sure to check any chances of the leakage of electricity.

2) You could handle a part in the vicinity of electricity after unplugging.

3) You should put on rubber glovers to prevent an electric shock on operation test.

4) Make sure the rated current, voltage, capacity before using an instrument.

5) Keep your wet hands away from the metal goods in the freezer compartment not to be frostbitten.

6) Be careful not to let water to permeate the electric part in the machine room.

7) With the door open during your working, you might be damaged by that door.

8) You should give a title to the refrigerator for your safe after removing the breakable goods inside the refrigerator.

9) You'd better use cotton gloves if you fix it up around the evaporator.

TABLE OF CONTENTS

EXTERNAL VIEWS .......................................................................................................................... 2

1. EXTERNAL SIZE .......................................................................................................................... 2

2. NAME OF PARTS ........................................................................................................................ 3

SPECIFICATIONS ............................................................................................................................ 4

1. OUTLINE ...................................................................................................................................... 4

2. ELECTRIC PARTS ....................................................................................................................... 4

3. POWER CORD ............................................................................................................................ 8

4. DOOR COLOR ............................................................................................................................. 9

OPERATION AND FUNCTIONS .............................................................................................. 10

DIAGRAM ......................................................................................................................................... 15

1. WIRING DIAGRAM ...................................................................................................................... 15

2. CIRCUIT WIRING DIAGRAM ....................................................................................................... 16

3. AIR FLOW DIAGRAM .................................................................................................................. 17

4. REFRIGRANT CYCLE DIAGRAM ............................................................................................... 18

DISASSEMBLY AND ASSEMBLY .................................................................................................. 19

EXPLODED VIEW AND PARTS LIST.............................................................................................. 31

1. TOTAL EXPLODED VIEW............................................................................................................ 31

2. TOTAL PARTS LIST..................................................................................................................... 32

3. MACHINE ROOM EXPLODED VIEW AND PARTS LIST............................................................. 36

EXTERNAL VIEWS

1. EXTERNAL SIZE

FR-521NT/NB

750

126

20.5

FR-551NT/NB

750

518

590

978

757

114

24 24

518

590

1038

757

702

597

1728. 5

1028. 5

20.5

597

1788.5

750

126

3.5

114

702

93 1088.5

3.5

2. NAME OF PARTS

EXTERNAL VIEWS

Freezer Compartment Lamp

Shell Freezer & Icr Tray

Case Icing

Temperature Controller ( Freezer Compartment )

Refrigerator Compartment Lamp

Fresh Case

Shell Refrigerator

Cover Vegetable

Case Vegetable

Front Grille

Adjustable Foot

Freezer Pocket

Egg Pocket

Egg Tray

Bottle Pocket

Multi Pocket

SPECIFICATIONS

1. OUTLINE

DIVISION CONTENTS

MODEL NAME FR-521NT FR-551NT USABLE CAPACITY FREEZER

REFRIGERATOR

TOTAL

EXTERNAL DIMENSION WIDTH 757mm 757mm

DEPTH 750mm 750mm HEIGHT 1749mm 1809mm

REFRIGENT R12 160g 160g

R134a 130g 130g

COOLING & CONTROL SYSTEM COOLING SYSTEM Fan Cooling System

DEFROST SYSTEM Fin Evaporator Forced DEFORST CONTROL Automatic Start & Stop

NET WEIGHT 71kg 72kg

125 125

319 355

444 480

2. ELECTRIC PARTS

1) COMPRESSOR

REFRIGEANT R12

VOLTAGE(V/HZ) 100/50,60 110/60 115,120/60 127/60 220/50 220/60 230/50 240/50

COMP MODEL X X X X SL28YE-5 PL23YH-4 SL28YE-5 SL28YE-5

PART CODE X X X X 3954128A50 3956123P40 3954128A50 3954128A50

STARING TYPE X X X X RSIR RSCR RSIR RSIR

REFRIGEANT R134a

VOLTAGE(V/HZ) 100/50,60 110/60 115,120/60 127/60 220/50 220/60 230/50 240/50

COMP MODEL X HBL25YG-3 X X HPL26YH-5 X HPL26YH-5

PART CODE X 3952125R30 X X 3956126S50 X 3956126S50

STARING TYPE X CSR X X RSCR X RSCR

SPECIFICATIONS

2) RELAY

REFRIGEANT R12

VOLTAGE(V/HZ) 100/50,60 110/60 115,120/60 127/60 220/50 220/60 230/50 240/50

ASSY

PTC RESIANCE X X X X

OVER LOAD

TYPENAME

PART CODE

OVER LOAD X

X X X X

X X X

276THBYY-52 181SHBYY-52 276THBYY-52

3018119940 3018116610 3018119940

33 22

REFRIGERANT R134a

VOLTAGE(V/HZ) 100/50,60 ASSY TYPE NAME

PART CODE X 3018119390

PTC RESISTANCE

PART CODE

OVER LOAD PART CODE

X S220 X X S330 X S330

X X X X X X 783NHB X X 197NHB X 197NHB

110/60 115,120/60

783NHBZZ-52

X X

127/60 220/50 220/60 230/50 240/50

197NHBYY-52 X 197NHBYY-52

X 3018119920 X 3018119920

3) STARTING CAPACITOR

REFRIGERANT R12

VOLTAGE(V/HZ) 100/50,60 110/60 115,120/60 127/60 220/50 220/60 230/50 240/50 PART CODE X RATED VOLTAE X X X X X X X X RATED CAPACITANCE X X X X X X X X

X X X X X X

REFRIGERANT R134a

VOLTAGE(V/HZ) 100/50,60 110/60 115,120/60 127/60 220/50 220/60 230/50 240/50 PART CODE X 3016400100 X X X X X X RATED VOLTAE X 100V X X X X X X RATED CAPACITANCE X

100

X X X X X X

4) RUNNING CAPACITOR

REFRIGERANT R12

VOLTAGE(V/HZ) 100/50,60 110/60 115,120/60 127/60 220/50 220/60 230/50 240/50 PART CODE X RATED VOLTAE X X X X X 350V X X RATED CAPACITANCE X X X X X

X X X 400EL15110 X X

X X

SPECIFICATIONS

REFRIGERANT R134a

VOLTAGE(V/HZ) 100/50,60 110/60 115,120/60 127/60 220/50 220/60 230/50 240/50 PART CODE RATED VOLTAE X 300V X X 400V X 400V RATED CAPACITANCE X

X 3816800400

X X

3016401900

5) F-FAN MOTER

REFRIGERANT R12,R134a

VOLTAGE(V/HZ) 100/50,60 110/60 115,120/60 127/60 220/50 220/60 230/50 240/50 TYPE NAME PART CODE 3015907200 REVOLUTION 2200RPM

DL-2213DWFC

6) C-FAN MOTER

REFRIGERANT R12,R134a

VOLTAGE(V/HZ) 100/50,60 110/60 115,120/60 127/60 220/50 220/60 230/50 240/50 TYPE NAME PART CODE 3015907300 REVOLUTION 2200RPM

DL-2213DWCB

7) DEFROST HEATER

REFRIGERANT R12,R134a

VOLTAGE(V/HZ) 100/50,60 110/60 115,120/60 127/60 220/50 220/60 230/50 240/50 SPEC(W) PART CODE X 3012805500

148W

8) LAMP ASSEMBLY

REFRIGERANT R12,R134a

VOLTAGE(V/HZ) 100/50,60 110/60 115,120/60 127/60 220/50 220/60 230/50 240/50 SPEC(W) PART CODE X 301360010 3013600080 COLOR

X 15W

9) PCB TRANSFORMER

REFRIGERANT R12,R134a

VOLTAGE(V/HZ) 100/50,60 110/60 115,120/60 127/60 220/50 220/60 230/50 240/50 TYPE NAME

PART CODE X 5EPK057860 5EPK057004

X FRB-5070NT

SPECIFICATIONS

10) MAIN PCB ASSEMBLY

REFRIGERANT R12,R134a

VOLTAGE(V/HZ) 100/50,60 110/60 115,120/60 127/60 220/50 220/60 230/50 240/50 TYPE NAME PART CODE X 3014385070 3014385060

N808RT

11) DRYER

REFRIGERANT R12 R134a

SPEC (g) 10g 15g PART CODE 3016801000 3016801010

12) FUSE (PCB)

REFRIGERANT R12,R134a

VOLTAGE(V/HZ) 100/50,60 110/60 115,120/60 127/60 220/50 220/60 230/50 240/50 RATED CURRENT

PART CODE X 5F3GB1682R

X 250V/1.6A

13) THERMO FUSE

REFRIGERANT R12,R134a

VOLTAGE(V/HZ) 100/50,60 110/60 115,120/60 127/60 220/50 220/60 230/50 240/50 OPERATING TEMPERATURE

PART CODE X 3017200500

14) DOOR S/W

REFRIGERANT R12,R134a

VOLTAGE(V/HZ) 100/50,60 110/60 115,120/60 127/60 220/50 220/60 230/50 240/50 PART CODE 3018100010

15) R-SENSER

REFRIGERANT R12,R134a

VOLTAGE(V/HZ) 100/50,60 110/60 115,120/60 127/60 220/50 220/60 230/50 240/50 PART CODE 301482300

SPECIFICATIONS

3. POWER CORD

NO SHAPE OF CODE PART CODE DESCRIPTION REMARK

1 3011315000 CP-2PIN FOR EUROPEAN COUNTRY

2 401RA17200 CP-2PIN FOR OTHER COUNTRY

3 4006D17101 KP-30 FOR AMERICA & ELSALVADOR

4 401PD17101 KP-211 FOR JAPAN & TAIWAN

5 3011300801 BP-3PIN

6 3011303010 #267 FOR CHILE

3011315310 FOR ISRAEL

3011303050 BS-1363A

FOR U.K, MIDDLE ASIA

SINGAPORE & MALAYSIA

9 3011301200 KP551/550 FOR CHINA & AUSTRALIA

Upper power cord’ s part code is only for lead wire, without any kinds of terminal or housing

SPECIFICATIONS

4. DOOR COLOR

1) ASSEMBLY URETHAN FREEZER DOOR

REFRIGERANT

COLOR TYPE

PART CODE X 3010075150 X X X 3010075170 X X

Dull lamina sheet

High-glossy Lamina sheet

2) ASSEMBLY URENTHAN REFRIGERATOR DOOR

FR-521NT

NON-KEY TYPE

R12 R134a

Normal PCM

High-glossy Bright PCM

Dull lamina sheet

High-glossy Lamina sheet

Normal PCM

High-glossy Bright PCM

REFRIGERANT

COLOR TYPE

PART CODE X 3010079100 X X X 3010079140 X X

Dull lamina sheet

High-glossy Lamina sheet

R12 R134a

Normal PCM

High-glossy Bright PCM

Dull lamina sheet

High-glossy Lamina sheet

Normal PCM

High-glossy Bright PCM

KEY TYPE

REFRIGERANT

COLOR TYPE

PART CODE X 3010079150 X X X 3010079160 X X

FR-551NT

Dull lamina sheet

High-glossy Lamina sheet

R12 R134a

Normal PCM

High-glossy Bright PCM

Dull lamina sheet

High-glossy Lamina sheet

Normal PCM

High-glossy Bright PCM

NON-KEY TYPE

REFRIGERANT

COLOR TYPE

PART CODE X 3010079110 X X X 3010079130 X X

Dull lamina sheet

High-glossy Lamina sheet

R12 R134a

Normal PCM

High-glossy Bright PCM

Dull lamina sheet

High-glossy Lamina sheet

Normal PCM

High-glossy Bright PCM

KEY TYPE

REFRIGERANT

COLOR TYPE

PART CODE X 3010079170 X X X 3010079180 X X

Dull lamina sheet

High-glossy Lamina sheet

R12 R134a

Normal PCM

High-glossy Bright PCM

Dull lamina sheet

High-glossy Lamina sheet

Normal PCM

High-glossy Bright PCM

OPERATION AND FUNCTIONS

CONTROL

FUNCTION

1 Display F-PCB

2 Temperature

Regulation of Freezer Compartment

INPUT CONTROL

Button :TEMP CONTROL Button

1. TEMP Conrol Button

2. R-Sensor

3. RT-Sensor

OBJECTS

Custom LED

COMP F-FAN

CONTENTS REMARK

1. Normal State Initial State ; Both compartments’ Icons indicate Middle-mode

(“ 1” , and “ 2” are lit.)

2. TEMP CONTROL Button Temperature Regulation of Freshfood Compartment Middle-right Icons are lit by pressing the button.

(1) 2 3 In winter

3. Temperature Regulation of Freezer Compartment Temperature is regulation by moving the lever to the left and / or the

right.

Temperature has nothing to do with PCB control.

1. Temperature regulation by TEMP Control Button.

(1) 2 3 In winter

2. R-Fan is controlled by On/Off-point of each mode.

3. On/Off DIFF : 1.0

( Middle (“ 1” ) OFF-point : 4.0 )

4. Step Difference of Fresh Food Compartment.

* 1 2 : 1.0 * 2 3 :1.0 * 3 IN WINTER : 1.0

Reference

- ON/OFF Diff : Fixed at Micom

- STEP Diff : Fixed at Micom

Comp and C-fan are Coworking

OPERATION AND FUNCTIONS

CONTROL

FUNCTION

3 Defrosting

Period

4 Defrosting

Mode

INPUT CONTROL

OBJECTS

1. Total Run-time of COMP

2. Running-rate of COMP

3. Total time of Door openings

4. RT Temperature

Defrosting Period 1. COMP

Defrosting Mode

2. R-FAN

3. HEATER

CONTENTS REMARK

1. What to be considered in determing Defrosting Period

1) Total Run-time of COMP : 6, 8, 10, 12, 14 hours

2) Running-rate of COMP (each 2hours’ running-rate) :

more than 80%

3) Total time of Door openings : 10 minutes

4) Total Time (COMP-On + COMP Off ) : 60 hours

5) Ambient Temperature : more than 35

6) In each Error : R1, F1, D1, F3, RT-S, Door-SW Error

2. Terms to start Defrosting Period

1) The Defrosting starts with the following conditions, in

case total COMP-run time passes 6, 8, 10 or 12hours

- when an Error occurs

- when running-rate of COMP is more than 80%

- when total Door-opening time is more than 10minutes

- when the ambient temperature is more than 35

2) Defrosting starts unconditionally when total COMP-

run time passes 14 hours, under the condition taht terms of 1) are not satisfied.

3) Defrosting starts immediately when Total-time

(COMP-On + Off time) is more than 60 hours, under the condition that terms of 1) and/or 2) are not satis fied.

1.Defrosting Mode

Pre-Cool

1) Time : 25minutes

2) COMP and R-Fan are On, and HTR is off

3) Pre-cool turns off when R-Sensor 2.5

C-Fan and COMP are coworking.

Heater

Defrosting

Pause

Fan Delay

1) Heater turns off when D-Sensor 10

2) Limit time : 80minutes

3) Heater continues to be On for 40 minutes of limit time when D-Sensor is in Error

4) Limit time 30seconds : Heater continues to be On after

Defrosting regardless of D-Sensor temperature.

40minutes : in case of D1-Error 80minutes : in normal control state

1) Time : 4minutes

2) COMP and R-Fan are Off.

1) Time : 5minutes

2) Only COMP is On, While R-Fan is Off.

2. Output Control and Limit Time of each Defrosting Mode

Pre-Cool Heater Defrosting Pause Fan Delay

COMP ON OFF OFF ON F-FAN ON OFF OFF OFF R-FAN

CONTROL HETER OFF ON OFF OFF Limit Time 50MINUTES

OFF OFF OFF

(1) 80 MINUTES (2) 40 MINUTES in case of D-Sensor Error

4MINUTES 5MINUTES

+ 26 hidden pages