Daewoo RF-405N, RF-425N, RF-455N, RN-405N, RN-425N Service Manual

S/M No.:

1. Model Information

Fan Cooling System

Molecular Sieve xH-9

1857 1897 2000

R-600a

FCP Button Control

375 404 375 404365365

R-134a

595

0.040kg

67 69 73

2500RPM
2400RPM

LED

67

AC 180W

225 242 268

1857

595 595 595
651 651 651

332 358

90 90 90

Weight

C-Pentane

69 73

2000

358

90

268

332

90
242
595

Condenser Fan Motor

Dryer

Capillary Tube

Defrost Shape

Defrost Type

Defrost Heater

Freezer Fan Motor

Total

Total

Refrigerator

Height

Depth

Width

Refrigerator

Electric Part

Blowing Agent

Control Type

Refrigerator Lamp

Gross Vol.

(ISO 15502)

Storage Vol.
(ISO 15502)

Diemension

Freezer

Cooling Cycle

Refrigerant Charge

SPECIFICATIONS

Model No.

Refrigerant Type

* is the Color

RN-405N** RN-425** RN-455N**RF-405N** RF-425N** RF-455N**

Evaporator Type
Condenser Type

315

Heater

ID0.7 x T0.55 x L2320

Automatic Start & Stop

90
225
595
651

120
245

Freezer

120 120 120
245 255 284
315

120
255

120
284

651

1897

AC 160W

Sheath Type

651

Fin Type

Glass Type

0.095kg

1

2. Interior Parts

SPECIFICATIONS

- Features are model dependent
( Below is RN-425N** model )

10

1. Refrigerator Shelves

2. LED Window

3. Multi Duct

4. Fresh Care Crisper (option )

5. Cover Vegetable Case

6. Vegetable Case

7. Feezer Case B

8. Freezer Case C

9. Dairy Pocket As

10. Refrigerator
Pocket
( Pocket Bottle)

11. Refrigerator
Pocket
( Pocket R *M)

8

12

7

6

5

2

4

3

1

9

11

2

3. Machine (Compressor) Compartment View

SPECIFICATIONS

- Features are model dependent
( Below isRN-425N** model )

1

10

2

5

3

8 11

4

13

9

12

1. Capacitor Run

2. Power Cord

3. Suction Pipe As

4. Pipe Absorber

5. Box Relay As

6. Fixture Compress (Washer)

7. Pipe Connector B

Compressor

6

7

8. Compressor Absorber

9. Dryer As

10. Pipe Wire Condensor As

11. Case vaporization As

12. Drain Hose

13. Compressor Cooling Fan

3

4. Refrigerant Cycle

- Welding Point

Silver Welding ( Ag 30%) 3 Point

SPECIFICATIONS

Copper Welding ( Ag 5%) 6 Point

4

5. Temperature Diagram

; The actual inner temperature varies depending on the food status, as the indicated setting temperature is a target temperature,

not actual temperature within refrigerator.

; Refrigeration function is weak in the initial time.

Please adjust temperature as above after using refrigerator for minimum 1 ~ 2 days.

SPECIFICATIONS

* Features are model dependent

( Below model is RN-421N* )

Refrigerator Dial Mode

MIN : 3 ~ 6 degree
NOR : 0 ~ 3 degree
MAX : -2 ~ 0 degree

Vegetable compartment

: 1 ~ 5 degree

Freezer Mode
MAX : below -20 degree

NOR : -18 ~ -20 degree
MIN : -16 ~ -18 degree

5

6. Wiring Diagram

- For RN-405N** RN-425N** RN-455N**(R-600a) Models

SPECIFICATIONS

6

6-3. Main PCB Circuit Diagram

SPECIFICATIONS

7

FUNCTIONS

PCB Control Panel LED

CONTROL OBJECTINPUT

PCB Control Panel Buttons

1. DISPLAY

Temperature
adjustment
button for refrigerator

“Super Cool”

Push “TEMP” button 30 times.
And then, push “S-COOL” button for
continuously and “TEMP” button 5 times.

Pull Down Test

“MIN” & “S-COOL”

on “MAX-NOR” & ”

MAX” flickeringly

11

18

9

ERROR “DEFROST” (F3)

ERROR “CYCLE” (C1

)

ERROR “DOOR S/W” (DR)

ERROR “D SENSOR” (D1)

ERROR “RT SENSOR” (RT)

TEMP STEP “MIN-NOR”

TEMP STEP “MIN”

TEMP STEP “MAX”

TEMP STEP “MAX-NOR”

Forced Defrost Test

ERROR “R SENSOR” (R1

)

TEMP S-COOL

TEMP STEP “NOR”

FUNCTION

Push “S-COOL” button for continuously
and “TEMP” button 5 times.

The Priorities of Error :

R SENSOR> RT SENSOR> DR S/W>
CYCLE> DEFROST

“NOR” flickeringl

y

“MIN-NOR”

“MIN” flickeringly

“MIN-NOR” & ”NOR”

“MIN” & ”NOR”

“MIN” & ”MIN0NOR”

Push “TEMP” button for continuously
and “S-COOL” button 5 times.
And then, push “S-COOL” button for
continuously and “TEMP” button 5 times.

“NOR”&“S-COOL” on,

“MAX-NOR” & ”

MAX” flickeringly

Push “TEMP” button 4 times.LED “MIN-NOR” on

Push “TEMP” button 3 times.LED “MIN” on

Push “TEMP” button 2 times.LED “MAX” on

Push “TEMP” button 1 times.LED “MAX-NOR” on

Push “S-COOL” button 1 time.LED “S-COOL” on

Initially positionLED “NOR” on

OPERATIONLED DISPLAY

Reference Page No.

8

FUNCTIONS

A. “TEMP” Button

1. Temperature control of Refrigerator compartment

2. 5 step mode of successive temperature mode

3. Initial mode by power input: step “NOR”

4. Temperature will be set if the button doesn’t get pressed again within 5 sec.

- Whenever pressing “TEMP” button, setting is repeated in the order of
“NOR” → “MAX-NOR” → “MAX” → “MIN” → “MIN-NOR” (LED LAMP ON)

B. Temperature of Refrigerator Control

1. COMP and FAN will be controlled by the on/off condition of each mode.1

2. Temperature Difference of Refrigerator each step :

3. Temperature of Refrigerator
at step “NOR” OFF point: is -1.2C

4. Refrigerator ON/OFF Temp.

Difference: 3.4C

C. “S-COOL” MODE

1. Press S-COOL SWITCH
and make S-COOL led lamp on.

2. COMP & FAN are on

until R-sensor

reaches to “Over Refrigeration
OFF Point”, -7C

3. After the reach of -7°C , STEP “MAX” mode continues.

4. When “S-COOL” MODE (Quick Refrigeration Mode)
lasts for about 40 minutes, it returns to general
operation mode.

D. Temperature of Freezer Control

-It will be only controlled by using

“KNOB F LOUVER” in Freezer.

PCB Control Panel LED

COMPRESSOR, FAN

CONTROL OBJECTINPUT

PCB Control Panel “TEMP” Buttons

R-sensor

2. Temperature Control of Refrigerator Compartment

Step 'MIN' 'MIN-NOR' 'NOR' 'MAX-NOR'

'

'

ON

OF

Temp

Dial

6.0 C

4.5 C

3.0 C

0.8 C

-1.3C

0.8 C

-0.5 C

-2.0C

-4.3 C

-6.5 C

“MAX”

“MAX-

“NOR”“MIN-NOR”“MIN”Temperature Step

2.2C2.3C1.5C1.3CTemp. Diff. of Each Ste

p

9

FUNCTIONS

Defrost Mode

A. When total operation time of compressor becomes: 6, 8, 10, 12 hours.

- any error mode-R1, D1, F3, C1, RT/S, Door SW error- happens.

- or, running rate of COMP (per 2hrs of total operation time) is more than 80%.

- or, total door open time is over 3 minutes.

- or, ambient temperature (RT) is more than 40C.

B. Even if the above condition “A” is not satisfied,

- Defrost mode starts immediately when total operation time of COMP is 14hrs.

- or, defrost mode starts immediately as long as total time (COMP on time + COMP off time) is 60 hrs.

A. General Defrost Mode

- How to start: By conditions of defrost

- Process :
General operation­ “PRE-COOL” - Defrost Heater on- Pause(10 min)-General operation
; PRE-COOL: When the defrost heater works, the temp. of freezer increases.
So the COMP works for 25 min before defrost mode.

- Limited Time of Defrost Heater
; 40 minutes: Heater turns off when “D SENSOR” is OPEN or SHORT.
; 60 minutes: Heater turns off after maximum 60 minutes.

- Heater Off: When the temperature at “D SENSOR” is over 10C

B. Forced Defrost Mode

- How to start: by press “TEMP” button for continuously and “S-COOL” button 5 times.

- Process: same as General Defrost Mode except “PRE-COOL”
; Heater is supposed to be on Initial 30 seconds even though the temp. at “D SENSOR” is over 10C.
(for TEST)

- How to confirm: by press “S-COOL” button for continuously and “TEMP” button 5 times.
And then, the mode displays.

- Display : led lamps “NOR”& “S-COOL” on, “MAX-NOR” & ”MAX” on/off continually

CONTROL OBJECTINPUT

Total COMP Work Time / COMP Working Rate

Total Door Open Time /

RT

3. Defrost Mode

Conditions of Defrost Mode

Defrost Mode

OFFONOFF

Defrost

OFFOFFON

Fan

OFFOFFON

Compressor

PauseDefrostPRE-COOL

10