Daewoo Frs 20 Service Manual

							10
DC13V / 1100±100rpm Condenser
Fan MotorDC13V / 1950
±100rpm R-Fan MotorDC13V / 2050
±100rpm F-Fan Motor E
L
E
C
T
R
I
C
A
L
P
A
R
T
SDispenser Model Specification ( 220~240V Models only ) Item
Basic Model Model Name
AC250V , 10A , 77℃ Fuse Temp (Defrost)PBN-38 F-Sensor D-Sensor D
E
F
O
R
E
S
T
AC220V / 5W - Water Pipe HeaterAC220V / 5W - Dispenser HeaterAC220V / 8W Louver Heater H
E
A
T
E
R
SP201R-7DL / SP201R-7DR
(SPF101B-2D / SPF101B-1D)AC230~240V / 25W (2EA) AC230~240V / 25W (2EA)
R-Lamp
Door Switch , F / RF-LampAC250V 15A Main Fuse (Power cord)AC220V / 7W Main Duct HeaterAC220V / 192W Defrost HeaterPBN-43 PBN-43
R-Sensor
 
						

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4-1. Display
5 43 2 1 Temp indicationMax Medium
Max 
Mid Medium
Min Min Temperature Chang
5 43 2 1 Temp indicationMax Medium
Max 
Mid Medium
Min Min Temperature Change
1. “FRZ.TEMP” Button
1) Temperature control of Freezer compartment
2) 5 step mode of successive temperature mode.
3) Initial mode by power input : “3”
※Whenever pressing button, setting is repeated in the order of 
Medium(3) →Medium Max(4) →Max(5) →Min(1) →Medium Min(2).
2. “REF.TEMP” button.
1) Temperature control of Refrigerator compartment
2) 5 step mode of successive temperature mode.
3) Initial mode by power input : “3”
※Whenever pressing button, setting is repeated in the order of 
Medium(3) →Medium Max(4) →Max(5) →Min(1) →Medium Min(2).
INPUTCONTROL OBJECT
CONTENTS REMARKS  FRZ.TEMP, REF.TEMP Inner Control (Lamp-LED)
4-1-1. Basic Model
※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 minimum2~3 days.
Temperature adjustment button
for refrigerator compartment.
Temperature adjustment button
for freezer compartment.
4. OPERATION AND FUNCTIONS
 
						

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1. Display control
2. “FREEZER SET” Button
1) Temperature control of freezer compartment
2) 7 step mode of successive temperature mode.
3) Initial mode by power input : “Medium(-19℃)”
※Whenever pressing button, setting is repeated in the order of 
Medium (-19℃) →Medium Max 1 (-20℃) →Medium Max 2 (-21℃)→Max (-22℃)
→Min (-16℃) →Medium Min 2 (-17℃) →Medium Min 2 (-18℃).
INPUTCONTROL OBJECT
CONTENTS REMARKS  Front PCB button
FREEZER SET, REFRIGERATOR SET
SUPER FREEZER, SUPER REFRIGERATOR
RESET FILTER, WATER / ICE, ICE MAKER LOCK
,LOCKFCP C-LED 
3. “SUPER FREEZER” Button
When this mode is chosen, the icon (FREEZER QUICK) is ON.After six month, LED ON FILTER CHANGE ICONDial ICE MAKER LOCK ICONDial LOCK ICONDial WATER / CUBED ICE/ CRUSHED ICE ICONAlways ON FUZZY, DEODORIZER ICONDial SUPER FREEZER,SUPER 
REFRIGERATOR ICONInitial mode : Freezer & Refrigerator set→
Medium (-19℃/4℃) 88 DISPLAY (SET TEMP.)Control FCP-LED
-21℃ Medium
Max 2
-18℃ Medium
Min 2-19℃
Medium
-22℃ Max
-20℃ -17℃ -16℃ Temp 
indicationMedium
Max 1 Medium
Min 1 Min Temperature 
Change
4-1-2. Dispenser Model
Temperature adjustment button
for freezer compartment.
Super freezer
Temperature adjustment button
for refrigerator compartment.
Super Refrigerator
Lock buttonWater filter resetDispenser select buttonIce maker lock button
Letters are indicated on 88 Display LED
 
						

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CONTENTS REMARKS 
4. “REFRIGERATOR SET” button.
1) Temperature control of Refrigerator compartment
2) 5 step mode of successive temperature mode.
3) Initial mode by power input : “Medium (4℃)”
※Whenever pressing button, setting is repeated in the order of 
Medium (4℃) →Medium Max (3℃) →Max (2℃) →Min (6℃) →Medium Min (5℃).
2℃ 3℃
4℃ 5℃ 6℃ Temp indicationMax Medium
Max 
Mid Medium
Min Min Temperature Change
5. “SUPER REFRIGERATOR” button.
When this mode is chosen, the icon (REFRIGERATOR QUICK) is ON.
6. “WATER / ICE” button
1) Select Water / Cubed Ice / Crushed Ice.
2) Icon lights up to show your selection is on.
Initial mode by power input : “Water” mode.
3) The mode of Cubed Ice or Crushed Ice continues for 1 hour and then changes
to Water. (Water icon turns ON)
7. “ICE MAKER LOCK” button
1) Start by pushing “ICE MAKER LOCK” button
①“ICE MAKER LOCK” icon is on
②“WATER” icon is always on
2) Stop by pushing “ICE MAKER LOCK” button again
①“ICE MAKER LOCK” icon is off
②“WATER” icon is on
8. “RESET WATER FILTER” button
1) The normal (ICON OFF) is on for 6 month after are first power input.
2) After sic months, icon is ON.
3) How to reset Filter information
①Push the “RESET WATER FILTER” button for 3 seconds after change.
9. “LOCK” button
1) This button stops operation of different button.
①“LOCK” icon is on
②Press this button to lock out this case and to keep temperature and  
function setting.
2) Push “LOCK” button again for more than a second to stop it.
※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 minimum2~3 days.Letters are indicated on 88 Display LED
REFERENCE : Please wait
for 2-3 seconds in order
to take final ice or  drops
of water when taking out
cup from the pressing
switches after taking ice
or water.
 
						

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1. Defrost Mode
INPUTCONTROL OBJECT
CONTENTS REMARKS  1. Defrosting Cycle1. Comp
2. F-Fan
3. R-Fan
4. D-Heater
Pre-Cool
Pause
Fan-Delay
Heater
Defrosting
Pre-Cool
1) Time : 50 minutes
2) Comp , F-fan : ON
R-fan : Control
D-HTR : OFF
3) If F-sensor ≤-27℃, then Pre-Cool becomes. OFF
Heater
Defrosting
1) Comp, F-fan, R-fan : OFF
D-HTR : ON
2) Time limit
30 seconds : Heater is ON regardless of D-sensor
temperature right after defrosting start
30 minutes : in case of D1- Error
80 minutes : in normal control state
3) If D-sensor ≥13℃, Heater Defrosting is OFF
Pause
Time : 7 minutes
Comp, F-fan, R-fan, Heater etc. : OFF
Fan-Delay
1) Time : 5 minutes
Comp : ON and  F-fan, R-fan, Heater : OFF
4-2. Defrost Mode
2.The defrost mode start with the following conditions
1) Total operation time of comp. becomes : 6,8,10,……… 24 hours.
①Comp. operating rate : more 85%
②Total door open time : 2 minutes
(Any door, F or R open time is over 2 minutes.)
③Any error mode : R1, F1, D1, F3, RT/S, Door-switch etc.)
2) Defrosting mode starts unconditionally as long as total comp. work time is
24 hours, even if the above conditions 1) are not satisfied.
3) Defrosting mode starts immediately as long as total time of [comp. ON +
comp. OFF] is over 60 hours, even if the above 1) and 2) conditions are not
satisfied.
3. In providing initial power (or returning power failure)
If D-sensor temp. ≤3.5℃, defrosting mode starts .
 
						

							15
CONTENTS REMARKS 
4. Flow Chart of Defrosting Start
Start
Comp. operating time
is over 24 hours?
Total time is
over 60 hours?
Comp. operating time
is over 6 hours?
EndDefrosting start
Comp. operating time
is over 2 hours?
Any error ?
NO
YES
NO
NO
YES
Total door open
time is over 2 min?
YES
YES
YES
YESNO
NONO
Comp. operating rate
is more 85%?
NO YES
 
						

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1. A/S Defrosting Mode (Heater defrost →Pause →Fan Delay)
INPUTCONTROL OBJECT
CONTENTS REMARKS  1. Defrosting Cycle 1. Comp
2. F-Fan
3. R-Fan
4. D-Heater
Heater
Defrosting
1) Comp, F-fan, R-fan : OFF
D-HTR : ON
2) Time limit
30 seconds : Heater is ON regardless of D-sensor
temperature right after defrosting start
30 minutes : in case of D1-Error
80 minutes : in normal control state
3) If D-sensor ≥13℃, Heater Defrosting is OFF
Pause
Time : 7 minutes
Comp, F-fan, R-fan, Heater etc. : OFF
Fan-Delay
1) Time : 5 minutes
Comp : ON
F-fan, R-fan, Heater : OFF
Pause
Fan-Delay
Heater
Defrosting
2. How to start
1) Push “REF.TEMP” button 5 times while pushing “FRZ.TEMP” button simultaneously. 
--------- FRS-U20IA
2) In “LOCK” mode, push “REFRIGERATOR SET” button 5 times while pushing “FREEZER SET”
button simultaneously. ------ FRS(N)-U20DA
3. How to proceed
1) Delete Pre-cool mode. (Others are same as normal defrosting)
2) Heater is ON regardless of D-sensor temp. at first 30 seconds.
(Check of defrosting current)
4-3. (Forced Defrosting) Mode
1. Fan voltage of control mode
INPUTCONTROL OBJECT
CONTENTS REMARKS  1. F-Sensor
2. R-Sensor1. F-FAN, R-FAN, C-FAN 
13 V 13 V 13 V VoltageC-FAN R-FAN F-FAN FAN
4-4. Fan Voltage of Control Mode
※Refer to the 5-4. (Fan Function )
 
						

							17
It is linked with comp. 
INPUTCONTROL OBJECT
CONTENTS REMARKS  1. CompLouver Heater 
1. Buzzer sounds if any button of Inner Control is pushed.
2. Buzzer sounds 4 times 3 seconds after initial power input.
3. Buzzer sounds for 3 or 1 times in case of A/S forced defrosting and short (pull down)
operation or explanation mode.
4. If door is open, buzzer sounds after every 1 minutes for 5 minutes (Door open  alarm)
INPUTCONTROL OBJECT
CONTENTS REMARKS  1. Control (Inner or F-PCB) buttons
2. Door Switch
3. Initial Power Input Buzzer
4-5. Louver Heater Control
4-6. Buzzer or Alarm Control
1. Control  refrigerator compartment lights
R-Lights turn ON/OFF by R-door switch ON/OFF
(※For 10 minutes after sensing door open, the lights turn off automatically 
through door close is not sensed.)
2. Control of freezer compartment lights.
F-Light turn ON/OFF by F-door switch ON/OFF
(※For 10 minutes after sensing door open, the lights turn off automatically 
through door close is not sensed.)
3. R-lights ON/OFF by home bar door switch ON/OFF. ( for only model with home bar )
R-lights turn ON for 10 minutes after sensing home bar door switch open.
4. Dispenser lamp control ( for only model with water/ice dispenser )
Dispenser lamp turns ON/OFF by Dispenser switch.
Dispenser lamp turns ON for 4 seconds after sensing switch close.
INPUTCONTROL OBJECT
CONTENTS REMARKS  1. Refrigerator door switch
2. Freezer door switch
3. Home bar door switch
4. Dispenser switchLamp
4-7. Control of Interior Lights (FRS(N)-U20DA)
 
						

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1. Start
Open and close “Freezer door  switch” 5 times while pushing “FRZ. TEMP” button
simultaneously.
2. Control
1) All other electrical components are OFF except for F-fan / R-fan
2) Fan Control
Door open →Fan ON  /  Door close →Fan OFF.
3) Display control
“FRZ. LED” and “REF. LED” are ON in good order
3. Stop
1) During Demo mode, push “Freezer door switch” open and close 5 times while pushing
“FRZ. TEMP” button simultaneously.
2) Power in again
INPUTCONTROL OBJECT
CONTENTS REMARKS  1. FRZ. TEMP
2. Door SwitchComp
F/R-Fan
Heater
4-8. Demonstration
1. Start
Push “ICE/WATER” button 5 times while pushing “FREEZER SET” button
simultaneously.
2. Control
1) All other electrical components are OFF except for F-fan / R-fan
2) Fan Control
Door OPEN →Fan ON  /  Door close →Fan OFF.
3. Stop or termination
1) During Demo mode, push “ICE/WATER” button 5 times while pushing “FREEZER 
SET” button simultaneously.
2) Power in again
INPUTCONTROL OBJECT
CONTENTS REMARKS  1. “FREEZER SET, WATER/ICE” Button , Door switchComp
F/R-Fan
Heater
4-8-1. Basic Model
4-8-2. Dispenser Model
 
						

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Compensation of R-sensor ON/OFF temp. (down)
In case temperature of refrigerator compartment is weak or insufficient,
take the following action.
INPUTCONTROL OBJECT
CONTENTS REMARKS  Main PCBResistance of R-sensor Mid ON/OFF Point
R36 : R-SENSOR standard resistance in normal mode (31.4K)
R37 : In case of weak ref., cut J1 (or J18) to down the standard resistance by 1.5deg(2K)
R38 : In case of weak ref., cut J2 (or J19) to down the standard resistance by 1.5deg(2K)
4-9. Compensation of R-sensor ON/OFF Point
FRS(N)-U20IAFRS(N)-U20DA
R-SENSOR
J2 R36
R37R38
J1
R-SENSOR
J19 R36
R37R38
J18
J1
J2J18,19
※Refer to the 5-2.
(Function of each sensor)
3
℃ -1.5
℃ 0
℃ Temperature
compensationcut - - J19cut cut - J18
FRS(N)
-U20DA3
℃ -1.5
℃ 0
℃ Temperature
compensationcut - - J2cut cut - J1
FRS(N)
-U20IA