Daewoo RN-271Nl User manual

Service Manual
RN-271N RN-272N RN-273N RN-274N
RN-331N RN-332N RN-333N RN-334N RN-335N RN-336N

1. SPECIFICATION
1-1. Model Information --------------------------------------------------------------------------------------------------------------------------------
2
1-2. Interior Parts ------------------------------------------------------------------------------------------------------------------------------------------
3
1-3. Machine Compartment View ------------------------------------------------------------------------------------------------------------------
5
1-4. Refrigerant Cycle -----------------------------------------------------------------------------------------------------------------------------------
6
1-5. Temperature Diagram ----------------------------------------------------------------------------------------------------------------------------
7
1-6. Wire Diagram -----------------------------------------------------------------------------------------------------------------------------------------
8
1-7. Main PCB Circuit Diagram ---------------------------------------------------------------------------------------------------------------------
9
2. FUNCTIONS
2-1. 'PCB VOLUME' Control --------------------------------------------------------------------------------------------------------------------------
10
2-2. Temperature Control of Refrigerator compartment ---------------------------------------------------------------------------------
11
2-3. Defrost Mode ------------------------------------------------------------------------------------------------------------------------------------------
12
2-4. Function of Low Ambient Temperature --------------------------------------------------------------------------------------------------
14
2-5. Time Saving Function ----------------------------------------------------------------------------------------------------------------------------
15
2-6. Control of R Sensor OFF Point ----------------------------------------------------------------------------------------------------------------
16
2-7. Error Display --------------------------------------------------------------------------------------------------------------------------------------------
17
3. DISASSEMBLY
3-1. Door Switch ---------------------------------------------------------------------------------------------------------------------------------------------
18
3-2. Cover Multi-Flow Duct As (in Fresh food Compartment) ---------------------------------------------------------------------------
19
3-3. Louver F As (in Frozen Food Compartment) --------------------------------------------------------------------------------------------
20
3-4. Door F/R --------------------------------------------------------------------------------------------------------------------------------------------------
21
4. How to Change Door Position ------------------------------------------------------------------------------------------------------------------------
23
5. How to Charge R-600a Refrigerant ----------------------------------------------------------------------------------------------------------------
24
6. Part List
6-1. Cabinet/ Evavorator/ Compressor Compartment --------------------------------------------------------------------------------------
29
6-2. Frozen Food Compartment ---------------------------------------------------------------------------------------------------------------------
30
6-3. Fresh Food Compartment ------------------------------------------------------------------------------------------------------------------------
31
6-4. Door Compartment ----------------------------------------------------------------------------------------------------------------------------------
32
CONTENTS
1

1-1. Model Information
Net Weight (Packing)
63(68)kg
67(73)kg
Blowing Agent
C-Pentane
Defrost Shape
Sheath Type
Electric Part
Freezer Fan Motor
AC 220V/50Hz, 2500RPM
Refrigerator Lighting
Bulb 15W x 1EA
Natural Convection Cooling System
Dryer
Desiccant: Molecular Sieve xH-9
Capillary Tube (unit: mm)
ID0.7 x T0.55 x L2290
Heater
Defrost Type
Automatic Start & Stop
Defrost Heater
AC230V, 130W
1800(1900)
1870(1970)
Cooling Cycle
Refrigerant Type
R-600a
Refrigerant Charge
0.044kg
Evaporator Type
Fin Type
Condenser Type
157
221
Diemension
(unit: mm)
Net Width (Packing)
545(584)
595(634)
Net Depth (Packing)
629(667)
650(685)
Net Height (Packing)
161
226
Storage Vol.
ISO 15502
(unit: L)
Total
240
305
Freezer
83
84
Refrigerator
Control Type
KNOB & Digital Smart Control
Gross Vol.
ISO 15502
(unit: L)
Total
271
337
Freezer
110
111
Refrigerator
1. SPECIFICATIONS
* is the Door Type
Buyer No.
RN-27*N
RN-33*N
Factory No.
RFP-24*N….N
RFP-301*N….N
2

1-2. Interior Parts
1-2-1. RN-271 model
1. SPECIFICATIONS
1. Refrigerator Shelves
2. Lamp Window
3. Multi Duct
4. Knob R Control
5. Cover Vegetable Case
6. Vegetable Case
7. Refrigerator Pocket "R"
8. Refrigerator Pocket "J"
9. Freezer Shelves
10. Freezer Case "A"
11. Freezer Case "B"
12. Adjusting Leg (Left)
13. Adjusting Leg (Right)
1
2
3
4
7
10
5
6
9
10
10
11
12 13
8
3

1-2. Interior Parts
1-2-2. RN-331 model
1. SPECIFICATIONS
1. Refrigerator Shelves
2. Lamp Window
3. Multi Duct
4. Knob R Control
5. Cover Vegetable Case
6. Vegetable Case
7. Refrigerator Pocket "R"
8. Refrigerator Pocket "J"
9. Freezer Shelves
10. Freezer Case "A"
11. Freezer Case "B"
12. Adjusting Leg (Left)
13. Adjusting Leg (Right)
9
2
3
4
7
5
6
1
10
10
11
12 13
8
4

1-3. Machine (Compressor) Compartment View
1. SPECIFICATIONS
1.Box Power As (Capacitor Run)
2. Power Cord
3. Switch P Relay As
4. Earth Comp Wire
5. Fixture Compressor (Washer)
6. Drain Hose
7. Compressor Absorber
8. Suction Pipe As
9. Dryer As
10. Case vaporization As
11.Pipe connector A
12. Pipe Wire Condensor As
13. Pipe Hot
- Features are model dependent ( Below is RN-271 model )
1
2
4
3
5 8 9 10 11
12
13
6 7
5

1-4. Refrigerant Cycle
- Welding Point
1. SPECIFICATIONS
Copper Welding ( Ag 5%)
5 Point
Silver Welding ( Ag 30%)
3 Point
Suction Pipe
Capillary Tube
Evaporator
Compressor
Pipe connector A
Dryer
①
②
③
④
⑤
⑥
⑦
⑧
6

1-5. 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.
1. SPECIFICATIONS
* Features are model dependent
( Below is RN-271 model )
Refrigerator Dial Mode
MIN: 5 ~ 8℃
MID: 2 ~ 5℃
MAX: -1 ~ 2℃
Vegetable compartment
: 1 ~ 5℃
Freezer Mode
LOW: -17 ~ -19℃
MID: -19 ~ -22℃
HIGH: -22 ~ -25℃
7

1-6. Wiring Diagram
1. SPECIFICATIONS
8

1.7. Main PCB Circuit Diagram
1. SPECIFICATIONS
9

2. FUNCTIONS
-PCB Volume
CONTROL OBJECT
INPUT
- Turn 'DIAL KNOB' on the 'COVER M/FLOW
DUCT'.
2-1. "PCB VOLUME" Control
PCB VOLUME
R SENSOR
DIAL KNOB
- Features are model dependent ( Below is RN-271 model )
<'COVER M/FLOW DUCT AS': Air Duct Device in the Refrigerating Compartment>
- Temperature is controlled by "PCB Volume" assembled with "Dial Knob".
- 12step(0step ~ 11step) mode of successive temperature mode
- Each model is diffrent using range.
RN_271 Model: step 0 ~ step 10
RN_331 Model: step 1 ~ step 11
10

2. FUNCTIONS
A. COMP and FAN will be controlled by the on/off condition of each mode.
B. Temperature Difference of Refrigerator each step :
C. Temperature of Refrigerator at Mid-'Dial Knob' OFF point :
- RN_271 Model : -3.16℃,
- RN_331 Model: -3.83℃
D. Refrigerator ON/OFF Temp.
Difference: 8.0C
E. Temperature of Freezer Control
-It will be only controlled by using “KNOB F LOUVER” in the Freezer Comaprtment.
- COMPRESSOR
- FAN
CONTROL OBJECT
INPUT
- Turn 'DIAL KNOB'
- R sensor
2-2. Temperature Control of Refrigerator Compartment
0
1
2
3
4
5
6
7
8
9
10
8.19
7.52
6.85
6.18
5.51
4.84
4.17
3.5
2.83
2.16
1.49
0.19
-0.48
-1.15
-1.82
-2.49
-3.16
-3.83
-4.5
-5.17
-5.84
-6.51
11
0.82
-7.18
OFF(℃)
ON(℃)
STEP
Mid- 'Dial Knob': RN_271 Model
Mid-'Dial Knob': RN_331 Model
11

2. FUNCTIONS
- Compressor
- F Fan
- Defrost Heater
A. Defrost Mode Operation conditon
(1) In case accumulated compressor run times: 6, 8, 10, 12 hours,
- when there occur any errors:
R1, D1, C1, RT, Door SW error etc. (Check "2-9. ERROR DISPLAY")
- or, running rate of COMP (per 2hrs of accumulated operation time) is more than 90%
- or, accumulated door open time is over 2 minutes
- or, ambient temperature (RT) is more than 38℃
(2) Even if the above condition is not satisfied,
defrost mode starts immediately when accumulated compressor run time is 14hrs.
B. Normal Defrost Mode
C. Forced Defrost Mode
- How to start:
(1) by press Door S/W for continuously and Control 'Dial Knob'(MIN -> MAX) 1 times.
(2) or, by press 'Test Key' 3 times on Main PCB
- If appliance has any error, Forces Defrost Mode don't start.
- Process: same as Normal Defrost Mode except 'PRE-COOL'
※Heater is supposed to be on Initial 30sec. even though the temp. at “D SENSOR” is
over 13℃. (for TEST)
- How to confirm: If Force Defrost Mode start, you can buzzer sound
CONTROL OBJECT
INPUT
- Accumulated Compressor Run Time
- Running Time Ratio of Compressor
- Accumulated Door Open Time
- Ambient temperature (RT)
2-3. Defrost Mode
'PRE-COOL'
•Comp ON, Fan On, Heater OFF
•Comp runs for 25min. before defrost mode
Defrost
Heater on
•Comp OFF, Fan OFF, Heater ON
•Heater off when 'D-Sensor' is over 10℃.
•Heater off after 60min. at normal control.
•Heater off after 40min. in case D1 error.
Pause
•Comp OFF, Fan OFF, Heater OFF
•10minutes.
Normal
Operation
12

2. FUNCTIONS
2-3. Defrost Mode
D. Flow chart of How to Start Defrost Mode
※A.C.R.T. : Accumulated Compessor Run Times
※R.R.O.C. : Running Rate of Compressor
※RT: Ambient temperature
Start
Yes
No
A.C.R.T.= 6,8,10,12hours
No
Yes
Any Error
No
Yes
R.R.O.C.(per 2hrs of A.C.R.T.)≥90%
No
Yes
Accumulated Door Open Time≥2min.
No
Yes
RT≥38℃
No
Yes
A.C.R.T.≥ 14hours
Defrost Mode Start
End
13

2. FUNCTIONS
- R HTR
- COMP
A. Condition of LOW RT
- RT sensor below 19℃
- When the RT sensor is over 20℃, the system comes to be “General Operation Mode”.
- When the RT sensor is between 19°C to 20°C, the system keeps the previous mode.
B. Control
- When the temp of RT sensor is between 14°C to 19°C, COMP on/off temp is 3°C UP
- When the temp of RT sensor is below 14°C, COMP ON/OFF temp is 4°C UP
CONTROL OBJECT
INPUT
RT
2-4. Function of Low Ambient Temperature (RT)
COMP
It takes several minutes to protect Compressor:
(1) 6 minutes after Comp off
(2) 30 minutes at operation of Low RT, but 6 minutes when the doors open more than 20 seconds
CONTROL OBJECT
INPUT
2-5. Prevention of Compressor Restart
Buzzer
A. When Forced Defrost Mode start, the buzzer rings 3times.
B. After 2 minutes power’s on, the buzzer rings 3 times.
C. At Short Circuit Test, the buzzer rings 1 times.
D. When door opens, the buzzer rings every 1 minute for 5 minutes.
CONTROL OBJECT
INPUT
- Forced Defrost Mode start
- Door Switch
- Initial Power Input
2-6. Buzzer Sound
N/A
14

2. FUNCTIONS
Buzzer
A. How to Save
- 1 min : Click FAST KEY one time on MAIN PCB.
- 30 min : If you press FAST KEY continuously, you can reduce 30 minutes on each 2.5 seconds with
buzzer.
B. Example for usage: when reduce test time
CONTROL OBJECT
INPUT
”FAST KEY”
2-7. Time Saving Function
Test Key
(purchased separately)
Fast Key
(purchased separately)
LED
MAIN PCB
15

2.FUNCTIONS
Control Resistance of R sensor OFF Point
- When the refrigeration of refrigerator is poor or weak though Fan and COMP are working continuously,
the following actions are recommended for service.
(1) Resistance (R25) : Default resistance (31.4Kohms)
(2) Resistance (R26) : Cut the “J1” off to reduce basic resistance by 1.5°C. (2Kohms up)
(3) Resistance (R27) : Cut the “J2” off additionally to reduce basic resistance by 1.5°C. (total 4Kohms up)
※R25 = R-SENSOR OFF point
R25 + R26 = R-SENSOR OFF point - 1.5°C
R25 + R26 + R27 = R-SENSOR OFF point - 3°C
CONTROL OBJECT
INPUT
”J1” , “J2” On Main PCB
2-8. Control of R-sensor OFF Point
16

2. FUNCTIONS
- ERROR DISPLAY
- If appliance has any errors, LED on the Main PCB is flickering.
- If the appliance is normal (no error), LED IS off.
A. 'R1' ERROR
: It happens when R-Sensor is OPEN or SHORT.
(1) LED DISPLAY: Shortly flickering(0.3sec.) 1 times.
(2) CONTROL:
Controlled by the following condition of RT
※If 'RT ERROR' happens at the same time, “COMP. ON/OFF Operating Time” is 16min/24min.
(3) RELEASE: When R-Sensor is working normally.
B. 'RT' ERROR
: It happens when RT-Sensor is OPEN or SHORT.
(1) LED DISPLAY: Shortly flickering(0.3sec.) 2 times.
(2) CONTROL: Delete the conditions of 'RT-sensor Control' and operate normally.
(3) RELEASE: When RT-Sensor is working normally.
C. 'd1' ERROR
: It happens when D-Sensor is OPEN or SHORT.
(1) LED DISPLAY: Shortly flickering(0.3sec.) 3 times.
(2) CONTROL: Return to next limit defrost time (40 min)
(3) RELEASE: When D-Sensor is working normally.
D. 'DR' ERROR
: It happens when the system senses door opens more than 1 hour.
(1) LED DISPLAY: Shortly flickering(0.3sec.) 4 times.
(2) CONTROL: Delete function relating to door switch sensing
(3) RELEASE: When sensing close from door S/W.
※When pusing 'TEST KEY' on the main PCB,
LED is long(1.0sec.) flickering several times.
ex. 'Forced Defrost Mode:' long flickering 2 times
LED Lamp
CONTROL OBJECT
INPUT
Sensor Error
2-9. Error Display
6/34
~13
10/30
~19
16/24
~29
20/20
29~
COMP. Operating ON/OFF TIME
(unit:min.)
RT sensor TEMP (unit:℃)
- To Confirm Errors:
Check LED on the main PCB
- The Priorities of Error :
R1→RT→D1→DR
DR Switch
4times
DR
D sensor
3times
d1
RT sensor
2times
RT
R sensor
1time
R1
ERROR
LED
CODE
flicker
17

3-1. Door Switch
3. DISASSEMBLY
No No
Inuput a thin driver in the upper part as above picture.
And lift up 'Door Switch' carefully.
Inuput a thin driver in the lower part as above picture.
And lift up 'Door Switch' carefully. Disconnect the wire housing.
Procedure
Procedure
1
3
2
18

3. DISASSEMBLY
3-2. Cover Multi-Flow Duct As (in Fresh food Compartment)
No No
1
Unlock the lamp window Unlock the 'COVER M/FLOW DUCT'
(1) Push the window right side (1) Check the marks of locking position on 'Cover'.
(2) Lever two window lock with flat driver (Number of the marks are model dependent)
(2) Push the 'cover' inside and Unlock.
Open window turning on the axis 'A'
Remove two screw cap with flat driver.
Unscrew 2 points Disconnect the Lamp & Sensor wire housing.
3
2
5
Procedure
Procedure
4
(1) Push
(2) Lever
(2) Lever
'A' axis
unscrew
unscrew
screw cap
Push
Push
the Mark of Locking Position
19