: In this Manual, some parts can be changed for improving, their
performance without notice in the parts list. So, if you need the
latest parts information,please refer to PPL(Parts Price List) in
Service Information Center
July . 2005
Page 2
C O N T E N T S
1. WARNINGS AND PRECAUTIONS FOR SAFETY --------------------------------------------
2. EXTERNAN VIEW
2-1. External Size ----------------------------------------------------------------------------------------2-2. Name of Each Parts ---------------------------------------------------------------------------------
4. OPERATION AND FUNCTIONS -------------------------------------------------------------------
5. CIRCUIT OPERATION
5-1. Power Circuit Diagram ----------------------------------------------------------------------------5-2. Function of Each Sensor -------------------------------------------------------------------------5-3. Relay Function --------------------------------------------------------------------------------------5-4. Fan Function -----------------------------------------------------------------------------------------
6. DIAGRAM
6-1. Wiring Diagram --------------------------------------------------------------------------------------6-2. Circuit Diagram of Main PCB ---------------------------------------------------------------------
9-1. Power Failure ----------------------------------------------------------------------------------------9-2. Freezer Compartment -----------------------------------------------------------------------------9-3. Refrigerator Compartment ------------------------------------------------------------------------9-4. Operation Noise of Refrigerator -----------------------------------------------------------------9-5. Door -----------------------------------------------------------------------------------------------------
10. COOLING CYCLE HEAVY REPAIR
10-1. Summary of Heavy Repair ----------------------------------------------------------------------10-2. Precaution during Heavy Repair --------------------------------------------------------------10-3. Practical Work for Heavy Repair --------------------------------------------------------------10-4. Standard Regulations for Heavy Repair -----------------------------------------------------10-5. Brazing Reference Drawing ---------------------------------------------------------------------
11. INSTALLATION GUIDE
11-1. Installation Preparation --------------------------------------------------------------------------11-2. If the Refrigerator can not enter the Door ---------------------------------------------------11-3. Refrigerator Leveling & Door Adjustment ---------------------------------------------------11-4. Water Line Installation ---------------------------------------------------------------------------11-5. Dispenser Water Flow ----------------------------------------------------------------------------
※Whenever pressing button, setting is repeated in the order of
Medium(3) → Medium Max(4) → Max(5) → Min(1) → Medium Min(2).
CONTROL OBJECT
REMARKS
Temperature adjustment button
for freezer compartment.
Temperature adjustment button
for refrigerator compartment.
MinTemperature Chang
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).
MinTemperature Change
※ 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.
Medium
Min
Medium
Min
Mid
321Temp indication
Mid
321Temp indication
Medium
Max
Medium
Max
Max
Max
54
54
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4-1-2. FRS(N)-U20DA / EA / FA / GA
INPUT
Front PCB button
FREEZER SET, REFRIGERATOR SET
SUPER FREEZER, SUPER REFRIGERATOR
RESET FILTER, WATER / ICE, ICE MAKER LOCK
,LOCK
CONTENTS
Water filter reset
Super freezer
Temperature adjustment button
for freezer compartment.
Dispenser select button
CONTROL OBJECT
Ice maker lock button
Super Refrigerator
Temperature adjustment button
for refrigerator compartment.
FCP C-LED
REMARKS
Lock button
1. Display control
ControlFCP-LED
88 DISPLAY (SET TEMP.)
SUPER FREEZER,SUPER
REFRIGERATOR ICON
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℃).
Letters are indicated on 88 Display LED
Temperature
Change
Temp
indication
Min
Medium
Min 1
Medium
Min 2
-18℃
Initial mode : Freezer & Refrigerator set→
Medium (-19℃/4℃)
Dial
Always ONFUZZY, DEODORIZER ICON
DialWATER / CUBED ICE/ CRUSHED ICE ICON
DialLOCK ICON
DialICE MAKER LOCK ICON
After six month, LED ONFILTER CHANGE ICON
Medium
-19℃
Medium
Max 1
-20℃-17℃-16℃
Medium
Max 2
-21℃
Max
-22℃
3. “SUPER FREEZER” Button
When this mode is chosen, the icon (FREEZER QUICK) is ON.
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CONTENTS
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℃).
Letters are indicated on 88 Display LED
REMARKS
MinTemperature 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
① Push the “RESET WATER FILTER” button for 3 seconds after change.
Medium
Min
Mid
4℃5℃6℃Temp indication
Medium
Max
Max
2℃3℃
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.
9. “LOCK” button
1) This button stops operation of different button.
① “LOCK” icon is on
② Press 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.
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4-2. Defrost Mode
1. Defrost Mode
Pre-Cool
Heater
Defrosting
INPUT
1. Defrosting Cycle
Pre-Cool
1) Time : 50 minutes
2) Comp , F-fan : ON
3) If F-sensor ≤ -27℃, then Pre-Cool becomes. OFF
Heater
Defrosting
1) Comp, F-fan, R-fan : OFF
2) Time limit
30 seconds : Heater is ON regardless of D-sensor
30 minutes : in case of D1- Error
80 minutes : in normal control state
3) If D-sensor ≥13℃, Heater Defrosting is OFF
CONTENTS
R-fan : Control
D-HTR : OFF
D-HTR : ON
temperature right after defrosting start
CONTROL OBJECT
1. Comp
2. F-Fan
3. R-Fan
4. D-Heater
REMARKS
Pause
Fan-Delay
2.The defrost mode start with the following conditions
1) Total operation time of comp. becomes : 6,8,10,……… 24 hours.
① Comp. operating rate : more 85%
② Total door open time : 2 minutes
(Any door, F or R open time is over 2 minutes.)
③ Any 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)
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
If D-sensor temp. ≤ 3.5℃, defrosting mode starts .
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
CONTROL OBJECT
1. Comp
2. F-Fan
3. R-Fan
4. D-Heater
REMARKS
Fan-Delay
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)
Fan-Delay
1) Time : 5 minutes
Comp : ON
F-fan, R-fan, Heater : OFF
4-4. Fan Voltage of Control Mode
INPUT
1. F-Sensor
2. R-Sensor
CONTENTS
1. Fan voltage of control mode
1. F-FAN, R-FAN, C-FAN
CONTROL OBJECT
REMARKS
※ Refer to the 5-4. (Fan Function )
C-FANR-FANF-FANFAN
13 V13 V13 VVoltage
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4-5. Louver Heater Control
INPUT
1. Comp
CONTENTS
It is linked with comp.
4-6. Buzzer or Alarm Control
INPUT
1. Control (Inner or F-PCB) buttons
2. Door Switch
3. Initial Power Input
CONTENTS
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.
CONTROL OBJECT
Louver Heater
REMARKS
CONTROL OBJECT
Buzzer
REMARKS
4. If door is open, buzzer sounds after every 1 minutes for 5 minutes (Door open alarm)
4-7. Control of Interior Lights (FRS(N)-U20DA / EA / FA / GA)
INPUT
1. Refrigerator door switch
2. Freezer door switch
3. Home bar door switch
4. Dispenser switch
CONTENTS
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.
CONTROL OBJECT
Lamp
REMARKS
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.
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4-8. Demonstration
4-8-1. FRS(N)-U20IA
INPUT
1. FRZ. TEMP
2. Door Switch
CONTENTS
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
4-8-2. FRS(N)-U20DA / EA / FA / GA
INPUT
CONTROL OBJECT
Comp
F/R-Fan
Heater
REMARKS
CONTROL OBJECT
1. “FREEZER SET, WATER/ICE” Button , Door switch
CONTENTS
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
Comp
F/R-Fan
Heater
REMARKS
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4-9. Compensation of R-sensor ON/OFF Point
INPUT
Main PCB
CONTENTS
Compensation of R-sensor ON/OFF temp. (down)
In case temperature of refrigerator compartment is weak or insufficient,
take the following action.
FRS(N)-U20IA
R-SENSOR
R36
R37
R38
J2
J1
FRS(N)-U20DA/EA/FA/GA
R36
R37
R38
CONTROL OBJECT
Resistance of R-sensor Mid ON/OFF Point
REMARKS
R-SENSOR
J19
J18
※ Refer to the 5-2.
(Function of each sensor)
J1
J18,19
J2
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)
cutcut-J1
FRS(N)
-U20IA
FRS(N)
-U20DA
Temperature
compensation
Temperature
compensation
0
℃
0
℃
-1.5
-1.5
℃
℃
cut--J2
3
℃
cutcut-J18
cut--J19
3
℃
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4-10. Error Display
4-10-1. FRS(N)-U20IA (LED Display of Inner Control)
INPUT
Temperature Control ButtonsLamp LED of Inner control
CONTENTS
1. How to start
1) Press “FRZ.TEMP” button 5 times while pressing
“REF.TEMP” button at the same time.
2. How to stop
1) Push “FRZ.TEMP” button 1 time.
2) It stops automatically in 4 minutes from the start.
3. All the error codes are reset if they turn to be normal.
4. Error display
FRZ. LED “5” is on and off F-sensor : open (“Lo”), short (“Hi”)
FRZ. LED “4” is on and offR-sensor : open (“Lo”), short (“Hi”)
CONTROL OBJECT
REMARKS
DisplayCONTENTS
FRZ. LED “3” is on and offRT-sensor : open (“Lo”), short (“Hi”)
FRZ. LED “2” is on and offD-sensor : open (“Lo”), short (“Hi”)
FRZ. LED “1” is on and offR-Door Switch : defective
REF. LED “5” is on and offF-Door Switch : defective
REF. LED “3” is on and offCycle : defective
REF. LED “2” is on and offReturn after defrosting : defective
REF. LED “1” is on and offEEPROM : defective
REF. LED “1” is onFull Down mode
REF. LED “1” is on and off (twice)Forced defrost mode for A/S
(Full down mode and forced defrost mode are displayed while pressing
“REF.TEMP” button at the error display mode)
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CONTENTS
5. Control way of Errors (if any)
1) “F-sensor” error
Cause : F-sensor open or short
Control : Condition of ambient temperature
How to reset : If F-sensor is normal, the error is terminal temperature.
2) “R-sensor” error
Cause : R-sensor open or short
Control : Condition of ambient temperature
How to reset : If R-sensor is normal, the error is terminal temperature.
3) “RT-sensor” error
Cause : RT-sensor open or short (full down)
Control : Normal operation, deletion of control by RT-sensor
If RT-sensor is normal, the error is terminated automatically.
Cause : D-sensor open or short (full down)
Control : Time limit (30 min) of defrosting return
If D-sensor is normal, the error is terminated automatically.
5) “Door” error
Cause : in case it senses that door is open for more than 1 hour.
Control : Deletion of function related door switch sensing
If door switch (open & close) is sensed, the error is terminated automatically.
6) “Cycle” error
Cause : in case comp. works for over 3 hours when D-sensor temp. is over -5℃
Control : normal operation
When D-sensor temp. is below -5℃ in comp. off it is terminated.
7) “Return after defrosting” error
Cause : in case defrosting return is done by time limit of 80 min
Control : Deletion of Pre-cool mode in defrosting mode
If defrosting return is done by D-sensor, it is terminated.
8) A/S forced defrosting mode
Push “REFRIGERATOR SET” button 5 times while pushing “FREEZER SET” button
Simultaneously.
Control : A/S forced defrosting control (Pre-cool is deleted)
If D-sensor temp. is over 10℃, the mode is terminated automatically.
When all error code is normal, the Refrigerator reset
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4-10-2. FRS(N)-U20DA/EA/FA/GA (CLED Display of Front PCB)
INPUT
Temperature Control Buttons88 Display CLED
CONTENTS
1. How to start
1) Under “LOCK” mode, press “SUPER FREEZER” button 5 times while pressing
“FREEZER SET” button at the same time.
2) The front CLED displays as the right diagram shows
( [Ex.] Time Display of 0003 signifies 3 minutes of power on time.)
3) Press “FREEZER SET” button and the following value is displayed successively.
① Time
② F-Sensor temperature
③ D-Sensor temperature
④ R-Sensor temperature
⑤ RT-Sensor temperature
⑥ P Factor display (Refer to water supply mode of automatic icemaker)
⑦ Filter remaining time until change (First check ; 4,320Hr)
Refer to Filter Information Reset of CLED of front control panel.
4) Error is displayed only if there is any ; it is skipped if no error.
2. How to stop
1) Push “LOCK” button 1 time.
2) It stops automatically in 4 minutes from the start.
CONTROL OBJECT
REMARKS
3. All the error Codes are reset if they turn to be normal.
4. Error code
CONTENTSERROR CODE
F-sensor : disconnection (“Lo”), short (“Hi”)F1
R-sensor : disconnection (“Lo”), short (“Hi”)r1
RT-sensor : disconnection (“Lo”), short (“Hi”)rt
D-sensor : disconnection (“Lo”), short (“Hi”)d1
R-Door Switch : defectivedr
F-Door Switch : defectivedF
Home bar Door Switch : defectivedH
I-sensor : disconnection (“Lo”), short (“Hi”)EI
Flow sensor : defectiveEF
Horizontal switch : errorEt
Water supply : errorEg
Micro switch : errorES
Drop the ice while EtEA
Full ice switch : errorEu
Cycle : abnormal or defectiveC1
Return after defrosting : abnormal or defectiveF3
Display Full Down modeCo
Display forced defrost mode for A/SD2
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CONTENTS
5. Control way of Error (if any)
1) “F1” error
Cause : F-sensor disconnection or short
Check point : Measure the resistance between both terminals after separating CN8 (or CN15)
of the Main PCB. (Refer to the 5-2.)
If F-sensor is disconnected or shorted , change the F-sensor in the freezer compartment.
How to reset : If F-sensor is normal, the error is terminal temperature.
2) “R1” error
Cause : R-sensor disconnection or short
Check point : Measure the resistance between both terminals after separating CN7 (or CN14)
of the Main PCB. (Refer to the 5-2.)
If R-sensor is disconnected or shorted , change the F-sensor in the refrigerator compartment.
How to reset : If R-sensor is normal, the error is terminal temperature.
3) “rt” error
Cause : RT-sensor disconnection or short (full down)
Check point : Measure the voltage of “A” part on the Main PCB.
If the voltage is 0.5V~4.5V, it is normal.
If the voltage is 0V (short) or 5V (disconnected), change the RT-sensor on the Main PCB
How to reset : If RT-sensor is normal, the error is terminated automatically.
REMARKS
A
< FRS(N)-U20IA >
4) “d1” error
Cause : D-sensor disconnection or short (full down)
Check point : Measure the resistance between both terminals after separating CN8 (or CN15)
of the Main PCB. (Refer to the 5-2.)
If D-sensor is disconnected or shorted , change the D-sensor on the evaporator.
How to reset : If D-sensor is normal, the error is terminated automatically.
5) Door error (“dF” “dR” “dH” on display)
Cause : in case it senses that door is open for more than 1 hour.
Check point : F/R door is opened or not.
6) “C1” error
Cause : in case comp. works for over 3 hours when D-sensor temp. is over -5℃
Check point : Refrigerant leakage.
7) “F3” error
Cause : in case defrosting return is done by time limit of 80 min
Check point : Measure the resistance between both terminals of the defrost heater.
(Assembled with evaporator)
If the resistance is ∞Ω (disconnected) or 0Ω (short) change the
< FRS(N)-U20DA >
A
8) “d2” mode (A/S forced defrosting mode)
Push “REFRIGERATOR SET” button 5 times while pushing “FREEZER SET” button
simultaneously.
Control : A/S forced defrosting control (Pre-cool is deleted)
If D-sensor temp. is over 10℃, the mode is terminated automatically.
Refer to the 4-3. .
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CONTENTS
9) “EI”ERROR
Cause : I-SENSOR disconnection / short
Check point : Measure the resistance between both terminals after separating CN11
of the Main PCB. (Refer to the 5-2.)
If F-sensor is disconnected or shorted , change the I-sensor in the automatic ice maker.
10) “EF” ERROR
Cause : When Flow-sensor ERROR (There is no Pulse during some time)
The number of pulse signal is below 10 by 1 sec during water supply.
Check point : Water supply line
11) “Eg” ERROR
Cause : I-sensor temp (5min after water supply) doesn’t go up.
Check the I-sensor or water supply line.
12) “ES” error (MICRO switch error)
Cause : When it senses 1min continuously
Check the MICRO switch of the dispenser.
REMARKS
13) “Ea” error
Cause : Malfunction of ice drop motor.
Check the motor by pushing test switch.
14) “Eu” error
Cause : Switch (which senses if the ice is full or not) is in error.
Control : When dropping the ice, the motor just rotates 90 degree.
Termination : When the switch is in normal.
15)“EA“ ERROR
Cause : When sensing Ice dropping by time 3 times in level sensor SW Error.
Control : Stop of Ice Maker
Termination : With normal level switch.
Re-input of power or push if icemaker test switch.
16)“Et” ERROR
Cause : Level switch error (No pulse is sensed for some time)
Control : By time (Supply mode is skipped)
Termination : Normal condition.
* When all ERROR CODE is normal, the Refrigerator reset
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4-11. Summary of Function
4-11-1. FRS(N)-U20IA (Inner Control)
INPUT
Each button
CONTENTS
Element A/S Function
“FRZ.TEMP” + “REF.TEMP” 5 timesForced Defrosting
“REF.TEMP”+ “FRZ.DOOR” OPEN/CLOSE 5 timesPull Down
“FRZ.TEMP”+ “FRZ.DOOR” OPEN/CLOSE 5 timesDemo function
“REF.TEMP”+ “FRZ.TEMP” 5 timesError display
4-11-2. FRS(N)-U20DA/EA/FA/GA (Front PCB)
INPUT
CONTROL OBJECT
Resistance of R-sensor Mid ON/OFF Point
REMARKS
CONTROL OBJECT
Each button
CONTENTS
1. All the modes are started “LOCK” mode (except “FILTER RESET” mode)
“WATER/ICE”+ “RESET WATER FILTER” 5timesEEPROM clear
“WATER/ICE” + “ICE MAKER LOCK” 5 timesIce maker test
Resistance of R-sensor Mid ON/OFF Point
REMARKS
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4-12. Back up Function (FRS(N)-U20DA/EA/FA/GA)
INPUT
None
CONTENTS
1. Filter Exchange Information : Record as a real-time from the point of
power input
2. P Factor (Information about Ice Maker)
4-13. Automatic Icemaker ( FRS(N)-U20DA/EA/FA/GA)
INPUT
Full ice sensing switch
Ice Maker Lock
Sensors
CONTENTS
1. Flow of ice making
CONTROL OBJECT
1. F-FAN, R-FAN, C-FAN
REMARKS
CONTROL OBJECT
Ice separating motor
REMARKS
START
Ice making mode
(water supply stand by)
Ice separating mode
Water supply mode
Water supply
check mode
RETURN
Ice is being made
▶
Ice tray is twisted to separate
▶
Water is supplied to ice tray
▶
Check is water is supplied OK.
▶
ice cubes
1) Press TEST switch under the Icemaker for more than 1 second and test starts.
* Test mode starts from ice separating mode.
* In case test switch has an error of short, test is done only once.
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CONTENTS
2) With the initial power input, Ice tray turns to be horizontal and ice making
mode starts.
3) Control of water hose heater
* Heater is always ON if RT-sensor has an error or RT is below 15 degree.
* Heater is always ON for 60 minutes (max. Limit time) if Flow-sensor has
an error
4) Water supply stand-by
Condition : if ice is sensed full
Operation : proceeds to Ice making mode (Ice separating and water supply Modes stop)
5) Crusher Function
It stops operation when freezer door is open
It operates if freezer door is closed.
2 Ice making mode
REMARKS
START
NO
130 min passed?
I-S<-12.5℃
Ice saparating mode
YES
YES
NO
I-S<-9.5℃
YES
15 min passed?
YES
NO
NO
1) Ice making stops if ice-sensor is below -12.5℃ after 130 minutes.
2) Ice making also stops if ice-sensor is below -9.5℃ for 15 minutes, though
ice-sensor is not below -12.5℃ after 130 minutes.
3) In case of ice sensor, ice making stops after 4.8 hours.
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3. Ice separating (drop) mode
status of
ice tray
CONTENTS
REMARKS
Ice separation start
level SW
normal
level SW
motor
revolution
level SW
error
8~11sec
MAX1.1sec8.5~12.2sec0.2sec
CW
CCW
1) Time of each zone used to verify level switch error
2) The rotation of motor is sensed at each zone
3) In case of level switch error, ice separation is done by time.
4) If ice separating motor has error, the mode stop.
4. Water supply mode
START
Water supply valve ON
Water flow Pulse Count = 0
Horizontal position
CW
1.1 sec11 sec10 sec
STOP
1sec passed after
water valve ON ?
Water flow Pulse > 10
Water flow Pulse spec
N
water supply time 〉time spec
water supply valve OFF
Y
Y
〉Pulse spec
N
Y
END
N
N
Flow-Sensor Error mode operation
Y
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CONTENTS
1)Water supply valve is open when water supply mode starts after separation of ices.
2) Water is supplied by time in case sensor has error.
3) Factor valve is variable which can be useful in AS action
① Water flow pulse is set to 238 if flow sensor is in normal condition.
(If water is supplied by time, maximum water supply time 165 seconds)
② In case water flow sensor has error, water time is 5.5 seconds.
5. Water supply check mode
5 minutes after water supply the status can be checked by RT-sensor and increase
of temp. Ice sensor.
Icemaker Lock function and its ICON Turn ON/OFF by pressing the button.
3) Display
① Water ICON turns ON as default mode
② The ICON of each mode turns ON by pressing its button.
(If display switch makes error during operation of a mode, its ICON turns OFF)
③ When Icemaker Lock ICON turns ON.
- ICE MAKER LOCK ICON turns ON
- If it is in the mode of Cubed Ice or Crushed Ice, the mode is changed to
Water and Water ICON turns ON
- If there is no button input for 1 hour after selecting Cubed Ice or Crushed
Ice the mode turns to Water (default)
CONTROL OBJECT
Dispenser Lamp
Crusher Motor
Flap Solenoid
Crusher Solenoid
Dispenser Water Valve
REMARKS
31
Page 33
4-15. Temperature control of “Magic Cool Zone” compartment (
FRS(N)-U20EA/GA)
INPUT
1. R-Fan
2. “Magic Cool Zone” sensor
3. “SELECT” button
CONTENTS
1. “Select” button
1) Temperature control of “Magic Cool Zone” compartment
2) 4 step mode of successive temperature mode.
Initial mode by power input : “OFF”
(“Off” → “Vegetable” → “Fish”→ “Meat”→ “Off”)
Letters are indicated on “88” display LED
Damper Open/Close point
DisplayMode
Power input
1’st Press
2’nd Press
3’rd Press
2. Normal Stepping motor Control (It is linked with Refrigerator Fan (R-Fan))
Off
-
-
CONTROL OBJECT
1. “Magic Cool Zone” damper
2. Damper heater
CloseOpen
Temp (℃)Temp (℃)
-
893Vegetable
23-1Fish
01-3Meat
REMARKS
“Vegetable”
“Fish”
“Meat”
Remark“Magic Cool Zone” damperR-Fan
Always closeON
Each mode ON/OFF ControlOFF
3. Damper heater control
1) Damper open → Damper heater OFF
2) Damper close → Damper heater ON
4. How to check error mode (Temp. display and forced damper Open/Close)
1) How to start
Push “Select” button for 2 seconds.
① Initial display : “sensor temp.” display. (if sensor is normal)
“Er” display. (if sensor is disconnected or short)
② Press “Select” button 1 time : “OP” display. (forced damper open )
③ Press “Select” button 2 time : “CL” display. (forced damper close )
2) How to stop
It stops automatically in 20 sec. from the start.
5. Control way for “Magic Cool Zone” sensor error.
1) If “Magic Cool Zone” sensor is disconnected or short.
2) Damper open and close by below table. Control (Condition of “Select” button)
“Select”
Condition
“Off”
Close
“Meat”“Fish”“Vegetable”
CloseCloseCloseON
R-Fan
Close
After 2min open
CloseOFF
from R-Fan off,
and then close
32
Open
Page 34
4) Control Flow & Timing Chart
① Crushed Ice
D.P SW
D.P SW
D.P SW D.P SW
D.P Lamp
D.P Lamp
D.P LampD.P Lamp
D.P S/V
D.P S/V
D.P S/V D.P S/V
(Flap)
(Flap)
(Flap)(Flap)
Gear Motor
Gear Motor
Gear MotorGear Motor
② Cubed Ice
D.P SW
D.P SW
D.P SW D.P SW
D.P Lamp
D.P Lamp
D.P LampD.P Lamp
CONTENTS
A
A
A
REMARKS
D
C
D
③ Water
Cube S/V
Cube S/V
Cube S/VCube S/V
D.P S/V
D.P S/V
D.P S/V D.P S/V
(Flap)
(Flap)
(Flap) (Flap)
Gear Motor
Gear Motor
Gear MotorGear Motor
D.P SW
D.P SW
D.P SW D.P SW
D.P Lamp
D.P Lamp
D.P LampD.P Lamp
Water S/V
Water S/V
Water S/VWater S/V
A
A
A
B
C
D
Delay time : A = 500ms, B = 500ms, C = 2.0s, D = 5.0s
33
Page 35
5. CIRCUIT OPERATION
5-1. Power Circuit Diagram
■ FRS(N)-U20IA
D
E
■ FRS(N)-U20DA/EA/FA/GA
A
C
B
E
※ Voltage of every part
Parts
A
D
C
B
EDCBA
CE6CE4CE3CE1MC1
5Vdc14.5Vdc12Vdc310Vac230VdcVoltage
※ Caution : Since high voltage (DC310V) is maintained at the power terminal, please take a measure after more
than 3minutes have passed after removing power cords in the abnormal operation of a circuit.
34
Page 36
5-2. Function of Each Sensor
■ FRS(N)-U20IA
CONTENTS
Compensation of
R-sensor ON/OFF temp.
[F-sensor]
1) It senses the temperature of freezer compartment and control Comp., F-fan ON/OFF
2) How it works;
Low ON
≒9.32㏀
≒3.24V
REMARKS
IC1
B
C
A
High OFFMid OFFWorking Point
-19℃-16℃-11℃Working Temp.
≒15.58㏀≒15.19㏀Resistance
≒2.73V≒2.93VSensing Voltage
(MICOM)
[R-sensor]
1) It senses the temperature of refrigerator compartment and control R-fan ON/OFF
2) How it works;
Low ON
≒23.33㏀
≒2.96V
[D-sensor]
1) It senses return point of defrosting heater.
2) How it works;
Working Point
Resistance
Sensing Voltage
* In case temperature of refrigerator compartment is weak or insufficient though comp.
and R-fan operate in normal way;
1) Cut J1 on the M-PCB, then temp. is lowered 1.5℃ than [Mid OFF point]
2) Cut J1 and J2 on the M-PCB, then the temp, is lowered 3℃.
Return point of defrosting heater
13℃Working Temp.
≒22.56㏀
≒3.08V
High OFFMid OFFWorking Point
3.2℃5.2℃7.7℃Working Temp.
≒24.76㏀≒24.05㏀Resistance
≒2.72V≒2.83VSensing Voltage
35
Page 37
■ FRS(N)-U20DA/EA/FA/GA
CONTENTS
Compensation of
R-sensor ON/OFF temp.
REMARKS
IC1
B
C
A
(MICOM)
D
[F-sensor (A)]
1) It senses the temperature of freezer compartment and control Comp., F-fan ON/OFF
2) How it works;
Low ON
≒9.32㏀
≒3.24V
[R-sensor (B)]
1) It senses the temperature of refrigerator compartment and control R-fan ON/OFF
2) How it works;
Low ON
≒23.33㏀
≒2.96V
[D-sensor (C)]
1) It senses return point of defrosting heater.
2) How it works;
Working Point
Resistance
Sensing Voltage
Return point of defrosting heater
13℃Working Temp.
≒22.56㏀
≒3.08V
High OFFMid OFFWorking Point
-19℃-16℃-11℃Working Temp.
≒15.58㏀≒15.19㏀Resistance
≒2.73V≒2.93VSensing Voltage
High OFFMid OFFWorking Point
3.2℃5.2℃7.7℃Working Temp.
≒24.76㏀≒24.05㏀Resistance
≒2.72V≒2.83VSensing Voltage
* In case temperature of refrigerator compartment is weak or insufficient,
though comp. and R-fan operate in normal way;
1) Cut J18 on the M-PCB, then temp. is lowered 1.5℃ than [Mid OFF point]
2) Cut J18 and J19 on the M-PCB, then the temp, is lowered 3 ℃
2. Explanation for the operation
* TA7291P is the drive IC for the only DC motor, and used for control of the fan motor
* One input and output is used for the control of the fan motor
Input
Motor IC No.5 Pin
(R:MT2/F:MT3/C:MT1)
(R:MT2/F:MT3/C:MT1)
Output
Motor IC No.2 Pin
High
Low
Remark
13VHigh
StopLow
- Vref is the reference voltage for the adjustment of the output voltage by the voltage
distribution of Vs (Maximum output voltage), and the output voltage applied to the fan
is determined by the PWM control using the software.
39
Page 41
6. DIAGRAM
6-1. Wiring Diagram
■ FRS(N)-U20IA
40
Page 42
■ FRS(N)-U20DA / EA / FA / GA
41
Page 43
6-2. Circuit Diagram of Main PCB
■ FRS(N)-U20IA
42
Page 44
43
Page 45
■ FRS(N)-U20DA / EA / FA / GA
44
Page 46
45
Page 47
7. COMPONENT LOCATE WIEW
7-1. Front View
Front PCB
Dispense
r
Button
Home bar
Door
(Option)
7-2. Inner View
Automatic
Ice Maker
F-Door
Switch
Freezer Compartment
(FRS(N)-U20DA)
F-Fan
Motor
F-Sensor
Geared
Motor
F-Lamp
R-Fan
Motor
R-Sensor
Refrigerator
Compartment
(FRS(N)-U20DA)
R-Lamp
R-Door
Switch
R-Sensor
Controller
Refrigerator
Compartment
(FRS(N)-U20IA)
Inner
R-Door
Switch
46
Page 48
7-3. Evaporator
Water Pipe
D-Sensor
Temp
Fuse
Evaporato
r
Defrost
Heater
7-4. Machine Compartment
Power cord
Compressor
Running
Capacitor
OLP
& PTC
Dryer
Condenser
Fan-Motor
Condenser
Tray Drip
Water
Valve
47
Page 49
8. HOW TO CHECK EACH PARTS
8-1. Hose Ice Maker Tube Assembly
1) Disassembling Procedure
NO
15
26
37
DISASSEMBLING PROCEDURENODISASSEMBLING PROCEDURE
▷Pull forward Ice Storage Case
▷Remove 2 screws.▷Disassemble Cover Guide Cab W/Tube A
9-2-3. Disconnection / breaking of Freezer Lights Wires
Start
Freezer light filament is
disconnected or breaking ?
Connection of F door
switch is OK ?
Check the F door switch
connection and F-light socket.
Change of F Lights
①①①①
N
Y
* Remove 2 screws
of light cover.
Y
Change the light bulb.
N
Repair the F-door switch.
Change of F Door Switch
①①①①
* Insert a flat tip screw
driver Into a gap of door
switch to pull forward.
②②②②
③③③③
※ Follow the reverse order
of disassembling after
changing the light.
* Hold the bottom of light
cover and pull forward
to remove.
* Change the light bulb.
(AC240V 25W)
62
②②②②
* Disconnect the housing
and change the switch
for a new one.
※ Be careful when changing
the switch. F and R door
switch are different in type
and shape.
※ Follow the reverse order
of disassembling after
changing the switch.
Page 64
9-3. Refrigerator Compartment
9-3-1. Refrigeration failure (Foods does not get cool or cold soon.)
Start
Any error mode
on F-PCB?
Y
※※※※ Refer to the 4-10.
(Error Display)
N
N
R-Motor works OK ?R-Motor is OK ?
Y
R-Sensor is OK
(normal) ?
Wiring connection
N
Y
Is OK ?
N
Y
Freezer compartment
Is OK ?
N
Y
Refrigerator gasket
have gap ?
Y
Gasket have
any gap ?
Solve error code
problem, if any.
N
Change
the R-Motor.
Y
Change the Main PCB.
Check the wirings.
Change the R-Sensor
and check connector.
Refer to “Freezing
does not work.”
Y
Repair to eliminate
the gap of gasket.
N
Foods are placed just
close to R-Sensor ?
N
Refrigerator door
openings are too often ?
N
N
N
Door is hanged down
to make gap between
cabinet ?
Y
Reassemble doors.
Y
Explain not to place foods close to
R-sensor or cold air spout.
Y
* Advise to use in “HIGH” mode
* Jumper cutting of Main PCB to
→ Option 1 : cut J18 to down 1.5℃.
→ Option 2 : cut J19 to down 1.5℃.
63
Explain not to open doors
unnecessarily or frequently.
prevent weak refrigeration ;
Page 65
9-3-2. Disconnection / Breaking of Refrigerator Lights Wires
Start
Freezer light filament is
disconnected or breaking ?
Connection of R door
switch is OK ?
Check the R-door switch
connection and R-light socket.
Change of F Lights
①①①①
N
Y
* Remove screws
of light cover.
Y
Change the light bulb.
N
Repair the R-door switch.
Change of F Door Switch
①①①①
* Insert a flat tip screw
driver into a gap of door
switch to pull forward.
②②②②
③③③③
* Hold the bottom
of cover and pull
forward to remove.
* Change the light
bulbs.
(AC240V 25W)
※ Follow the reverse order
of disassembling after
changing the light.
64
②②②②
* Disconnect the housing
and change the switch
for a new one.
※ Be careful when changing
the switch. F and R door
switch are different in type
and shape.
※ Follow the reverse order
of disassembling after
changing the switch.
Page 66
9-3-3. Dews on Refrigerator Compartment
Start
Dews are formed
on the gasket inside
R-compartment?
N
Door is open too long ?
N
Door is open and closed
too frequently ?
N
Y
Gasket has
Any gap ?
Y
Repair to eliminate the gap.
N
N
Door is
hanged down ?
Y
Reassemble the doors.
Y
Explain not to open doors
too long.
Y
Explain not to open
doors unnecessarily.
Heat appliances are
used near the refrigerator ?
N
Watery or hot foods are
stored in the R-compartment?
N
R-fan works OK ?
Y
Y
Make enough distance between
the appliances and refrigerator.
Y
Advise to cool down foods, wrap
or cover foods with much water
before storing in the compartment.
N
Repair and change R-motor.
65
Page 67
9-3-4. Excessive Refrigeration of Vegetable Case
Start
Refrigerator temp.
mode is “HIGH” ?
N
R-check valve
Works OK ?
Y
Is there any
R-sensor error code ?
Y
Explain the temperature modes.
Advise to set the temp. to
“Middle” or “LOW” mode.
N
Repair and/or Change
the R-check valve.
※ Refer to “Repair /Change
of Check Valve”.
N
R-sensor is OK ?
N
Change the R-sensor.
Y
Y
Check the R-sensor connection.
(Check the connector to Main PCB.)
66
Page 68
Removing of Check Valve
①①①①
②②②②
③③③③
* Remove screws
of light cover.
* Hold the bottom
of cover and pull
forward to remove.
* Disconnect light
housing.
⑤⑤⑤⑤
⑥⑥⑥⑥
⑦⑦⑦⑦
* Hold the bottom and
right of damper to pull
down to remove.
* Lift up a piece of Check Valve
Flap and insert a finger to the
valve frame to hold out.
④④④④
⑧⑧⑧⑧
* Remove screws with a
(+)screw driver.
67
Page 69
9-4. Operation Noise of Refrigerator
9-4-1. Comp. operation Noise
Start
Refrigerator is leveled ?
Y
Front cover or door gasket
is assembled wrong ?
N
Rubber absorber comp
is distorted or aged ?
N
N
Level the refrigerator by
adjusting wheels.
☞ Refer to User’s Guide
and SVC Manual.
Y
Set it right.
Y
Change the Rubber absorber.
Sound from Comp itself
or Vibration ?
Y
Change the compressor.
Remarks
● Compressor sound is somewhat normal because it works like a heart to circulate the refrigerant in
the pipes during the refrigerator operation.
● Rattling or metallic touch sound of motor, piston of comp. can be heard when it starts or stops.
68
N
Attach a restrainer on the comp.
head to reduce vibration and
high frequency noise.
Page 70
9-4-2. Refrigerant Flow Sound
Start
Water flowing or hiss sounds
from the refrigerator ?
N
Refrigerant sound of hiss or
sizzling sound when comp. starts ?
N
Refrigerant sound of hiss or
sizzling when comp. stops ?
N
Y
Attach an absorber gum
on the capillary tube.
Y
Apply a gum on the
accumulator.
Y
Apply a gum on the
accumulator.
Any shaking sound from
Y
F-compartment
when comp. works ?
N
Fasten the evaporator in F-
compartment tightly against
touching (liner) surfaces.
Explain refrigerator work
mechanism and sound to the
users or customers.
Remarks
● Water flowing sound, hiss or sizzling sound can make while refrigerant in the pipes is changing from
liquid to gas state when comp. starts or stops.
It is normal to the refrigerator.
69
Page 71
Troubleshooting of Evaporator Sound
1. Hiss Sound from Capillary Tube
“I” tube
2
1
3
2. Sizzling Sound from Accumulator
Attach a absorber on point ③ (accumulator).
3. Shaking or trembling Sound of Evaporator
1) “I” tube is used to connect the
capillary tube and evaporator.
(2 welding points : ①, ②)
2) When such a sound is made,
attach a absorber on the tube
including 2 welding points.
1) Check whether evaporator is fastened tight
with the fasteners of ①, ②.
2) Insert a soft spacer (EPS) between left and right wall.
Evaporator not to be shaken or trembled during
1
2
refrigerator operation.
70
Page 72
9-4-3. Fan Noise
Start
Fan is damaged
or transformed ?
N
Fan is touching
the surround ?
N
Fan-motor assembly
is moving or shaking ?
N
Y
Change the fan.
Y
Set it right not to touch.
Y
Set it right not to move.
Motor has its own noise
Y
or vibration when working ?
N
Explain to the customers
how fan is working to
circulate cold air in the
compartments.
Remarks
● The fan is sending out cold air to circulate it through the compartments.
When the air is touching the surface of louver or liner wall, such sound can make.
Change the motor
assembly.
71
Page 73
Troubleshooting of Fan Noise
1. Fixing or Fastening of Fan Motor
1) Check if fan motor frame of the assembly is
fastened tightly with screws to the liner wall.
Unless it is tight, vibration of shaking can make.
2) Check if fan motor and fan are hanged down.
Fan working sound can be louder if they are
not set right.
2. Any Touch Sound from Fan
1) Check if sealing sponge on the insulator
touches the fan.
If so, set it again not to touch it.
2) If any damage on the insulator around the fan
rotation is found, set the fan motor assembly right
not to touch it.
72
Page 74
9-4-4. Pipe Noise
Start
Pipes are touching
in the machine compartment ?
N
Tray drip makes
noise by Condenser shaking ?
N
Pipe itself is
shaking much ?
N
Y
Separate the touching
pipes, if any.
Y
Apply cushion material between
Comp. base and Tray drip.
Y
Move or change the points of
vibration absorber rubbers on
the pipes to reduce the shaking.
Compressor itself
Y
is shaking much ?
Attach a absorber
N
on the comp. head.
Explanation to the users.
Remarks
● Refrigerant is erupting rapidly from the compressor to circulate pipes, so pipe shaking noise
can make to some degree.
● In case compressor vibration is sent to a pipe directly, apply vibration absorber rubbers to welding
points of the pipe and comp. or to a much bent point on the pipe.
73
Page 75
9-5. Door
9-5-1. Door Opening Alarm Continues though the door is closed.
Start
Door switch is pushed
well ?
Y
Door switch is soaked with
water or there is water in
the switch ?
N
PCB input is OK ?
N
Check #5,6 of CN8 (F-Door)
→ Open : 5V, Close : 0V
N
Y
and #4,6 of CN7 (F-Door).
Check if interior light is ON.
Y
Attach a thin pad on the
door liner or change the
door assembly.
Change the door switch.
Repair any disconnection
of wires and defective
Door switch.
Connector insertion to
Main PCB is OK ?
N
Door switch itself is
OK ?
N
Check it up.
Y
Repair the defective
connection.
Y
Change the switch.
74
Page 76
10. COOLING CYCLE HEAVY REPAIR
10-1. Summary of Heavy Repair
ToolsContentsProcess
Remove
refrigerant
Residuals
Parts
replacement
and welding
Vacuum
Refrigerant
charging and
charging
inlet welding
* Cut charging pipe ends (Comp. & Dryer) and
discharge refrigerant from drier and compressor.
* Confirm refrigerant (R-134a or R-600a) and oil for
compressor and drier.
* Confirm N2 sealing and packing conditions before use.
Use good one for welding and assembly.
* Weld under nitrogen gas atmosphere.
* Repair in a clean and dry place.
* Evacuate for more than forty minutes after connecting
manifold gauge hose and vacuum pump to high (drier)
and low (compressor) pressure sides.
* Weigh and control the bombe in a vacuum conditions
with electronic scales and charge through compressor
inlet (Process tube).
* Charge while refrigerator operates).
* Weld carefully after inlet pinching.
* Nipper, side cutters
* Pipe Cutter, Gas welder,
N2 gas
* Vacuum pump
, Manifold gauge.
* Bombe (mass cylinder),
refrigerant manifold gauge,
electronic scales, punching
off flier, gas welding machine
Check
refrigerant leak
and cooling
capacity
Compressor
compartment
and tools
arrangement
Transportation
and
installation
* Check leak at weld joints.
Note :Do not use soapy water for check.
* Check cooling capacity
Check condenser manually to see if warm.
→
Check hot pipe manually to see if warm.
→
Check frost formation on the whole surface of the
→
evaporator.
* Remove flux from the silver weld joints with soft
brusher wet rag. (Flux may be the cause of corrosion
and leaks.)
*Clean tools and store them in a clean tool box
or in their place.
* Installation should be conducted in accordance with
the standard installation procedure. (Leave space of
more than 5 cm from the wall for compressor
compartment cooling fan mounted model.)
* Electronic Leak Detector,
Driver.
* Copper brush, Rag, Tool box
75
Page 77
10-2. Precautions During Heavy Repair
1) Use special parts and tools for R-134a or R-600aUse of tools.
1) Remove retained refrigerant more than 5 minutes after turning off
Removal of retained
refrigerant.
a refrigerator. (If not, oil will leak inside.)
2) Remove retained refrigerant by cutting first high pressure side
(drier part) with a nipper and then cut low pressure side.
(If the order is not observed, oil leak will happen.)
Suction tube
PrecautionsItems
Low pressure
side
Evaporator
Replacement of drier.
Nitrogen blowing
welding.
Others.
Hot Pipe
Dryer
High Pressure side
Process tube
Compressor
Discharge tube
Condenser
1) Be sure to replace drier when repairing pipes
and injecting refrigerant.
1) Weld under nitrogen atmosphere in order to prevent oxidation
inside a pipe. (Nitrogen pressure : 0.1~0.2 kg/cm2.)
1) Nitrogen only should be used when cleaning inside of cycle pipes
inside and sealing.
2) Check leakage with an electronic leakage tester.
3) Be sure to use a pipe cutter when cutting pipes.
4) Be careful not the water let intrude into the inside of the cycle.
76
Page 78
10-3. Practical Work for Heavy Repair
1. Removal of residual
refrigerant.
1) Remove residual refrigerant more than 5 minutes later after
turning off the refrigerator. ( If not, compressor oil may leak inside.)
2) Remove retained refrigerant slowly by cutting first high pressure
side (drier part) with a nipper and then cut low pressure side.
Suction tube
PrecautionsItems
Low pressure
side
Evaporator
2. Nitrogen blowing
welding.
Hot Pipe
Dryer
High Pressure side
Evaporator
Hot Pipe
Process tube
Compressor
Discharge tube
Compressor
①
Condenser
Low pressure
side
④
Dryer
Process tube
②
Condenser
High Pressure side
③
* When replacing a drier:
Weld ①and② parts by blowing nitrogen (0.1~0.2kg/cm2) to high
pressure side after assembling a drier.
* When replacing a compressor:
Weld ③and④ parts by blowing nitrogen to the low pressure side.
Note) For other parts, nitrogen blowing is not necessary because it
does not produce oxidized scales inside pipe because of its short
welding time.
※※※※ KEYPOINTING
Welding without nitrogen blowing produces oxidized scales inside
a pipe, Which affect on performance and reliability of a product.
77
Page 79
3.Vacuum degassing.
PrecautionsItems
* Pipe Connection
Connect a red hose to the high pressure side and a blue hose
to the low pressure side.
* Vacuum Sequence
Open ①,② valves and evacuate for 40 minutes.
Close valve ①.
Evaporator
4.Refrigerant charging.
Compressor
Low
Pressure
Hot Pipe
DryerCondenser
High
Pressure
①
Vaccum
Pump
Blue
Yellow
Red
②
※※※※ KEYPOINTING
1) If power is applied during vacuum degassing, vacuum degassing
shall be more effective.
2) Operate compressor while charging refrigerant. (It is easier and
more certain to do like this.)
* Charging sequence
1)Check the amount of refrigerant supplied to each model after
completing vacuum degassing.
2) Evacuate bombe with a vacuum pump.
3) Measure the amount of refrigerant charged.
- Measure the weight of an evacuated bombe with an electronic scale.
- Charge refrigerant into a bombe and measure the weight. Calculate
the weight of refrigerant charged into the bombe by subtracting the
weight of an evacuated bombe.
Indicate the weight of
an evacuated bombe
78
※※※※ KEYPOINTING
1) Be sure to charge
the refrigerant at
around 25°C.
2) Be sure to keep
-5g in the winter
and +5g in summer.
Calculation of amount of refrigerant charged
the amount of refrigerant charged
= a weight after charging
- a weight before charging
(a weight of an evacuated cylinder)
Page 80
PrecautionsItems
4.Refrigerant charging.
5. Gas-leakage test
6. Pipe arrangement
in each cycle
4) Refrigerant Charging
Charge refrigerant while operating a compressor as shown above.
5) Pinch a charging pipe with a pinch-off plier after completion of charging.
6) Braze the end of a pinched charging pipe with copper brazer and take
a gas leakage test on the welded parts.
Compressor
Bombe
* Take a leakage test on the welded or suspicious area with an
electronic leakage tester.
* Check each pipe is placed in its original place before closing
a cover back-M/C after completion of work.
10-4. Standard Regulations for Heavy Repair
Condenser
Evaporator
Hot Pipe
Dryer
1) Observe the safety precautions for gas handling.
2) Use JIG (or wet towel) in order to prevent electric wires from burning during welding.
(In order to prevent insulation break and accident.)
3) The inner case shall be melted and insulation material (polyurethane) shall be burnt
if not cared during welding inner case parts.
4) The copper pipe shall be oxidized by overheating if not cared during welding.
5) Not allow the aluminum pipes to contact to copper pipes. (In order to prevent corrosion.)
6) Make sure that the inner diameter should not be distorted while cutting a capillary tube.
7) Be sure that a suction pipe and a filling tube should not be substituted each other during welding.
( High efficiency pump.)
79
Page 81
10-5. Brazing Reference Drawings.
Accumulator
Hot Pipe
R
I-Pipe
Suction Pipe
F
Evaporator
Pipe Suc Conn
Condenser
Dryer
Pipe Conn B
Capi-Tube
▶ Welding Point
●
■
▶ Flow of Refrigeration Cycle
HighLow
Compressor
Copper Welding (Ag 5%)
Silver Welding (Ag 35%)
Pipe Conn. B
Pipe Suction Conn
Wire-Con. Pipe
Suction Pipe
Compressor
Hot Pipe
Accumulator
7 Points
3 Points
Capillary Tube
Dryer
Evaporator
80
Page 82
11. INSTALLATION GUIDE
11-1. Installation Preparation
Check if the refrigerator can pass
a doorway or enter a door first.
Dimensions( including Door Handles)
(Width*Depth*Height)
Find a suitable place to install
903mm X 734.5mm X 1790mm
Sufficient space from refrigerator back to the
※wall for free air ventilation
Once the installation place is ready follow the installation instructions.
If surround temperature of refrigerator is low (below 10℃)),
foods can be frozen or the refrigerator can work in abnormal way.
※Avoid direct sunlight.
81
Page 83
11-2. If the refrigerator can not enter the door
Removing Freezer Door
Remove front bottom cover first,
1
Pull out the left collar of the
coupling first, then hold the
coupling and pull out the left
water tube.
Lift up the front of hinge to remove.
4
( After the hinge is removed the
door can fall down forward.
Be careful !)
※Remove front bottom cover first, if it is attached.
Unscrew top hinge cover with a
2
screw driver.
Remove the hinge cover.
Be careful not to damage the
5
water line when removing the
door.
Turn top hinge bolt
3
counterclockwise .
Disconnect the harness wires.
Removing Refrigerator Door
Unscrew top hinge cover with a
1
screw driver.
Remove the hinge cover.
Lift the door straight up to remove.
4
Turn top hinge fastener
2
counterclockwise.
Disconnect harness wires.
Lift up the front of hinge to remove.
3
(After the hinge is removed the
door can fall down forward.
Be careful !)
82
Page 84
Replacing Freezer Door
Insert the water tube into the hole
1
Of the bottom hinge pin first, then
Insert the bottom of freezer door
Into the bottom hinge pin.
Turn the hinge fastener tightly to
4
The end.
Connect harness wire and screw
ground wire.
Insert the bottom hole of freezer
2
door straight to the bottom hinge
pin.
Insert the water tube far into the
5
coupling.
Let the top of door close to the
3
cabinet and insert the top hinge
pin to the top hole of freezer door.
( Insert the back of hinge to the
groove of protrusion first, then
front to the top hole of door.)
Replacing Refrigerator Door
Insert the bottom hole of
1
refrigerator door straight to the
bottom hinge pin.
Let the top of door close to the
2
cabinet and insert the top hinge
pin to the top hole of refrigerator
door.
( Insert the back of hinge to the
groove of protrusion first, then
front to the top hole of door.)
83
Turn the hinge fastener tightly to
3
the end.
Connect harness wirings and
screw ground wire.
Click and screw the top hinge
cover.
Page 85
11-3. Refrigerator Leveling & Door Adjustment
※Refrigerator must be level in order to maintain optimal performance and desirable front appearance.
(If the floor beneath the refrigerator is uneven, freezer and refrigerator doors look unbalanced.)
In case freezer door is lower
than refrigerator door
Insert a screw driver (flat tip) into a groove of the
left wheel (bottom of freezer) and turn it clockwise
until the door is balanced.
(clockwise to raise freezer door ;
counterclockwise to lower)
In case refrigerator door is lower
than refrigerator door
Insert a screw driver (flat tip) into a groove of the
right wheel (bottom of refrigerator) and turn it
clockwise until the door is balanced.
(clockwise to raise refrigerator door ;
counterclockwise to lower)
Caution
The front of refrigerator needs to be higher just a little than the back for easy
door closing, but if the wheel is raised too much for door balance, i.e. front of
refrigerator is too higher than the back, it can be difficult to open the door.
84
Page 86
11-4. Water Line Installation
How to install Water Line
1.The water pressure should be 3kgf/cm2 or more to run the
automatic icemaker.
※Checkup your tap water pressure ; if a cup of 180cc is full
within 10 seconds, the pressure is OK.
2.When installing the water tubes, ensure they are not close to
Any hot surface.
3.The water filter only “filters” water ; it does not eliminate any
bacteria or microbes.
4.If the water pressure is not so high to run the icemaker, call the
local plumber to get an additional water pressure pump.
5.The filter life depends on the amount of use. We recommend
you replace the filter at least once every 6months.
※When attaching the filter, place it for easy access (removing
& replacing)
6.After installation of refrigerator and water line system, select
[WATER] on your control panel and press it for 2~3 minutes to
supply water into the water tank and dispense water.
7.Use sealing tape to every connection of pipes/tubes to ensure
there is no water leak.
8.The water tube should be connected to the cold water line.
Installation Procedure
1. Join connector to water tap
1)First lock the main tap water valve.
Check if connector B and C has its own rubber packing ring in it.
2)Join Connector C to the water tap, then Connector B to
connector C with a wrench or spanner.
3)Insert water pipe into Connector-B and join Connector-A with a
wrench or spanner.
4)In case Connector-C does not fit water tap join Connector-B
directly to the tap. (See Figure B.)
※If no connector fits water tap, call your local service.
5)Unlock main tap water valve, open tap water and check if any
water leaks on each joins.
Place the rubber washer inside the tap connector and
screw onto the water tap.
2. Get ready to install water line
1) Measure an approximate distance between the filter and the
Water Tube and cut the tube off filter vertically.
2) Connect the tubes to the filter as the figure shows.
Leave a sufficient distance when cutting the tubes.
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Page 87
3. Remove any substance from filter
1) Open the main tap water valve and check if water comes out of
the Water Tube.
2) Check if the Water Valve is open in case water does not come out.
3) Leave the valve open until clean water is coming out.
※Initial water may contain some substances out of filter
(manufacturing process).
4. Attach the filter box
1)Screw and fasten the filter holder to the left/right side of the back of
refrigerator.
※In case the holder is not fastened well, remove the back paper
of the tape on the filter holder and attach it.
2)Insert the filter box into the holder.
5. Connect water tube
1)Remove the rear cover at the bottom back of the refrigerator.
2)
Insert the fastening ring into the Water tube.
(Be careful to follow the direction of the nut.)
3)Insert the Water Tube into the top of Water Valve, turn the nut
clockwise to fasten it. (The Water valve is to the right of the motor.)
4)Check for any bent tubes or water leaks; if so, re-check instalation
procedure.
5)Replace the rear cover. (The Water Tube should be placed
between the groove of the refrigerator back and motor cover.)
Set the tube upright as the figure shows.
6. Fasten water tube
1) Fasten the Water Tube with the [Fastener A] .
2) Check if the tube is bent or sqeezed. If so, set it right to
prevent any water leak.
7. After installation
1) Plug the refrigerator, press the [WATER] button on the control
panel for 2~3 minutes to remove any air (bubble) in the pipes
and drain out the initial water.
2) Check the water leak again through the water supply system
(tubes, connectors and pipes) Rearrange the tubes again
and do not move the refrigerator.
613012214100FRAME CHECK VALVE ASFRU-571I
623012024200FIXTURE MOTR AS
62-13015916000MOTOR R FAND4612AAA20
633011495100COVER DAMP ASFRU-541D
63-13014807100SENSOR R ASPBN-43B
3011185710GPPS
64CASE CHILD
3011185740FRU-571I(NANO)
653012514511GUIDE CASE A *L ASHIPS
663012514611GUDIE CASE A *R ASHIPS
3013602500AC 240V 25W(S)
67LAMP F/R
3013602800AC 125V 25W
693015510800WINDOW R LAMPMIPS
3018124000SP201R-7DR (R-134a)
71SWITCH DR
3018128500SPF101B-2D(R-600a)
723017842820SHELF INMOLDING R A ASFRAME+PRINTED GLASS
733017842500SHELF WINEGPPSx
743017843320SHELF INMOLDING R C AS FRAME+PRINTED GLASS
753017842920 SHELF INMOLDING R B ASFRAME+PRINTED GLASS
763012514511 GUIDE CASE A *L ASHIPS12222
773012514611 GUDIE CASE A *R ASHIPS12222
3011109200CASE+FRAME
78
3011109230CASE(NANO)+FRAME
3011114600CASE+FRAME
3011114630CASE(NANO)+FRAME
803018701800 DEO ANTI ASW40XT5XL4011111
813011445900 COVER RETURN DUCTPP11111
823011446700 COVER VEGETB CASE BGPPS111
833012529711 GUIDE CASE C *L ASHIPS111
843012529811 GUIDE CASE C *R ASHIPS111
933011171310 CASE EGG ASCASE+VINYL11111
943018201000 TANK WATER ASFRU-541Dx1111
CASE VEGETB A AS
CASE VEGETB B AS
CASE VEGETB C AS
CASE CHANGE RM AS
20IA 20DA 20EA 20FA 20GA
1
1
1111
1111
1111
-111
1111
1
1
1
1111
1
2222
1
1111
x
1
Q'ty
x
x
1111
Option
111
179
x
111
xxx
1
1
1
1
1
22222
1
2
1
1
111
x
11
- Some parts can be chaged for improving their perfomance without notice.
- Above parts number doesn't describe your own colour & printing. Please remind!
90
Page 92
x
Freezer Room
x
A
NOPART-CODEPART NAMESPEC.
7630125145 11 GUIDE CASE A *L ASHIPS
7730125146 11 GUDIE CASE A *R ASHIPS
8330125297 11 GUIDE CASE C *L ASHIPS
8430125298 11 GUIDE CASE C *R ASHIPS
963012529000 GUIDE DRNGA
973011186300 CASE ICEPP
983017842710 SHELF F ICE ASFRAME+PRINTED GLASS+FIXTURE
1003015915900 MOTOR F FAND4612AAA21
1013018921300 LOUVER F AABS
1023011834500 FANABS OD3.17XD130
1033011200510 CLAMP FANSUS 304
1053010968600 CAP F LOUVER BHIPS
1063018921501 LOUVER F B ASHIPS
1073011443200 COVER F RETURNHIPS