Lg Lfxs30726 Page 1

Workshop Manuals
CAUTION
BEFORE SERVICING THE UNIT,
READ THE SAFETY PRECAUTIONS IN THIS MANUAL.
MODEL : LFXS30726*
COLOR : STAINLESS(ST)
REFRIGERATOR
SERVICE MANUAL

Contents Summary of Lg Lfxs30726

  • Page 1REFRIGERATOR SERVICE MANUAL CAUTION BEFORE SERVICING THE UNIT, READ THE SAFETY PRECAUTIONS IN THIS MANUAL. MODEL : LFXS30726* COLOR : STAINLESS(ST)
  • Page 2ATIONS ............................................................................................................................................................. 3 ENTIFICATION ........................................................................................................................
  • Page 3S SPECIFICATIONS ITEMS SPECIFICATIONS Side Rounded VEGETABLE TRAY Clear Drawer Type inches) 35 3/4 X 36 1/4X 70 1/4 (WXDXH) 29.8cu.ft. COMPRESSOR Linear pounds) 150kg (331lb) EVAPORATOR Fin Tube Type TEM Fan Cooling CONDENSER Spiral Condenser E CONTROL Micom Control REFRIGERANT R-134a (135 g) SYSTEM
  • Page 4Modular Door Bin Interchangeable bins can be arranged to suit your storage needs. Icemaker Ice Bin Ice Compartment Door -4-
  • Page 5Refrigerator Door N: Before you begin, unplug the refrigerator. Remove food and bins from doors. r -FIG. 2 ct water supply tube by pushing back on the disconnect ring (3).-FIG. 1 or. Loosen top hinge cover screw (1). ip screwdriver to pry back hooks on front underside of cover (2). Lift up cover. ct
  • Page 6moval Insert and press gasket into channels at doorliner. screws. up carefully. Mullion Replacement 1. Connect wire harness. t wire harness. 2. Insert mullion into channel. Insert the mullion into channel at door as shown below. et Removal sket gasket from gasket channel at doorliner as 3. Assemble
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  • Page 8efrigerator doors is uneven, follow the 1) Remove the plastic guide for slides on left side by low to align the doors: unscrewing phillips head screws. ng legs (CCW) to raise or (CW) to lower the 2) Pull out the cover sensor to disassemble by using tools ont of the refrigerator by using flat blade s
  • Page 9rator, or disconnect power at the circuit 1. Unplug refrigerator power cord from electric outlet. 2. Put flat screwdriver into sevice hole and remove cover of move top shelf or shelves. refrigerator light. ator Compartment Lamp crews. nds with your both hands and pull it o remove it. 3. Remove the L
  • Page 10gerator power cord from electric outlet. 1. Remove 2 screws and guide rail. frigerator door to need diassembly. wdriver into service hole, remove the cover LED LAMP. 2. Remove the upper and lower Caps by using a flat screwdriver and remove 2 screws as shown figure. LED assembly from connector. 3. Di
  • Page 111) Remove the 1 screw holding the lever. 2) Remove the spring from the hook. 3) Push and pull on the tab to remove. drain 2) Holding the inner side of the dispenser pull Button Lever forward to remove. 3-12 WATER BUTTON ASSMEBLY 1) Remove screws. 2) Grasp the Button assembly and lift. Button Lever n
  • Page 12crews marked in the picture below. 1) Separate the Housing of the Cap Duct Motor. 2) Unscrew 3 screws to disassemble the motor. ottom of motor cover assembly and pull it out move. 3) When replacing the motor, check the position of the door duct and the link for proper fit. Duct Door Link Cap Duct Mo
  • Page 13dles, as shown in the picture. 1) Insert the Ice Bin, slightly tilting it to avoid touching the Icemaker. (Especially, Ice-Detecting Sensor) Auto shuto (feeler arm) Note) Before remove ice bin, put on clean golves for r part slightly. keeping clean ice bin. Bin out slowly. - 13 -
  • Page 14Steps to Remove the freezer door. Step 2) Remove the lower basket. ve the two screws from the guide rails (one Step 4) Removal of the freezer door is done by l ifting clear ach side). of the rail support. Fully extend both rails. ve only 1 screw of gearice, and disassemble Step 6) Remove 2 screws of
  • Page 15both side of supporter cover tv into Step 2) Assemble a bar and gear ice with screw. ctor rails, and then screw them. Push the otherside of the gear to inside of the bar. ar ice assembled with the bar by screw into Step 4) Insert opposite gear ice into connector rail and ctor rail’s hole. screw them
  • Page 16water to unit. Remove the waterline from the 1) Remove screws for the Drain Pipe Assembly and the 1 connected to the Motor Cover. ver and 1 screw from the valve. anical Cover 2) Remove the screw from shroud and Separate the Fan motor assembly and Shroud. e housing and remove the valve. ng Assemble i
  • Page 17ade screwdriver to push the tab in on the left rail and push the tab on the right rail in with your finger. bs have been pushed in, you can lift the tray up and out. ls out to the full extension and insert the insert the back of the tray into both rails. Then set the front of the rail and push it un
  • Page 18a sealed system repair : Start with the power cord unplugged from the outlet. Plug in the power cord and 12 seconds after it has been pugged in, unplug it from the power source. this will allow both sides of the 3 e opened to allow for proper evacuation. alve Service Whole picture of refrigerator al
  • Page 19Since linear Comp conducts linear reciprocating motion, we have protection logic for compressor, motor and PCB or intakes low temperature and low pressure as the below. vaporator of the refrigerator and compresses -temperature and high-pressure gas. It then - Stroke Trip s to the condenser. During t
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  • Page 237. PCB Picture 7-1. Main PCB ( P/ P P/N /N : EBR789406) 6 CON7 CN1 CON201 CON6 CON3 CON2 CON5 CON1 7-2. Display PCB ( P/N : EBR791597) CON802 CON102 CON101 CON3 CON103 - 23 -
  • Page 247-3. Sub PCB - 24 -
  • Page 258. Trouble Shooting 8-1. Freezer Sensor Error (E FS) Symptom Check Point 1. E FS 1. Check f or a loose connection 2. Check Sensor Resistance CON7 CN1 CON201 CON6 CON7 CON3 CON2 CON5 CON1 Resistance [Ω] Short 0 CON7 Open OFF 17th pin ~ 18th pin Other Normal CON7 Resistance [Ω] 17th pin ~ 18th pin -22
  • Page 26Freezer Sensor Error (E FS) 1 4 Reconnect or Is the Connector disconnected Yes repair the Check the Sensor resistance. or loose between Main PCB and connector Is resistance normal? sensor? Yes CON7 5 Check the Temperature and resistance ref er to the table. No problem? CON7 No Resistance [Ω] 17th pi
  • Page 272. Refrigerator Sensor Error (E rS) Symptom Check Point 1. E rS 1. Check f or a loose connection 2. Check Sensor Resistance CON7 CN1 CON201 CON6 CON7 CON3 CON2 CON5 CON1 Resistance [Ω] Short 0 CON7 Open OFF 15h pin ~ 16th pin Other Normal CON7 Resistance [Ω] 15th pin ~ 16th pin 23ºF / -5ºC 38k 32ºF
  • Page 28Refrigerator Sensor Error (E rS) 1 4 Reconnect or Is the Connector disconnected Yes repair the Check the Sensor resistance. or loose between Main PCB and connector Is resistance normal? sensor? Yes CON7 5 Check the Temperature and resistance ref er to the table. No problem? CON7 No Resistance [Ω] 15
  • Page 298-3. Icing Sensor Error (E IS) Symptom Check Point 1. E IS 1. Check f or a loose connection 2. Check Sensor Resistance CON7 CN1 CON201 CON6 CON5 CON3 CON2 CON5 CON1 Resistance [Ω] Short 0 CON5 Open OFF 11th pin ~ 12th pin Other Normal CON5 Resistance [Ω] 11th pin ~ 12th pin -22ºF / -30ºC 40k -13ºF /
  • Page 30Icing Sensor Error (E IS) 1 4 Reconnect or Is the Connector disconnected Yes repair the Check the Sensor resistance. or loose between Main PCB and connector Is resistance normal? sensor? Yes CON5 5 Check the Temperature and resistance ref er to the table. No problem? CON5 Resistance [Ω] No 11th pin
  • Page 318-4. Defrost Sensor Error (F dS) Symptom Check Point 1. F dS 1. Check f or a loose connection 2. Check Sensor Resistance Defrost Controller CON7 CN1 CON201 CON6 CON7 CON3 CON2 CON5 CON1 Resistance [Ω] Short 0 CON7 Open OFF 19th pin ~ 20th pin Other Normal CON7 Resistance [Ω] 19th pin ~ 20th pin 23ºF
  • Page 32Defrost Sensor Error (F dS) 1 4 Reconnect or Is the Connector disconnected Yes repair the Check the Sensor resistance. or loose between Main PCB, connector Is resistance normal? Def rost controller and Sensor? CON7 Yes 5 Check the Temperature and resistance ref er to the table. No problem? CON7 No R
  • Page 338-5. Defrost Sensor Error (r dS) Symptom Check Point 1. r dS 1. Check f or a loose connection 2. Check Sensor Resistance Defrost Controller CON7 CN1 CON201 CON6 CON7 CON3 CON2 CON5 CON1 Resistance [Ω] Short 0 CON7 Open OFF 13th pin ~ 14th pin Other Normal CON7 Resistance [Ω] 13th pin ~ 14th pin 23ºF
  • Page 34Defrost Sensor Error (r dS) 1 4 Reconnect or Is the Connector disconnected Yes repair the Check the Sensor resistance. or loose between Main PCB, connector Is resistance normal? Def rost controller and Sensor? CON7 Yes 5 Check the Temperature and resistance ref er to the table. No problem? CON7 No R
  • Page 358-6. Defrost Heater Error (F dH) Symptom Check Point 1. F dH 1. Check the door gasket 2. Check the Def rost Heater 3. Check the PCB output voltage CON7 CN1 CON201 CON3 CON6 CON3 CON2 CON3 CON2 CON5 CON1 Part Resistance [Ω] FUSE-M 0 (1) 62~70 Def rost Heater (2) 144~167 Def rost Sensor 22k↑ TEST MODE
  • Page 365 Defrost Heater Error (F dH) Replace Is the resistance value of defrost No Defrost Sensor sensor as follow? 1 Resistance is influenced by temperature. Replace the Check the Door gasket . Yes Door gasket Is door gasket damaged? CON7 Resistance [Ω] 19 thpin ~ 20 th pin 23ºF / -5ºC 38k No 32ºF / 0ºC 3
  • Page 378-7. Defrost Heater Error (r dH) Symptom Check Point 1. r dH 1. Check the door gasket 2. Check the Def rost Heater 3. Check the PCB output voltage Defrost Controller kŒ™–š›GoŒˆ›Œ™ CON7 CN1 CON201 CON3 CON6 CON3 CON2 CON3 CON2 CON5 CON1 Part Resistance [Ω] FUSE-M 0 Def rost Heater 103~119 Def rost S
  • Page 38Defrost Heater Error (r dH) 5 Replace Is the resistance value of defrost No Defrost Sensor sensor as follow? 1 Resistance is influenced by Replace the temperature. Check the Door gasket . Yes Door gasket Is door gasket damaged? No 2 Is the Connector Properly Reconnect Sensor connected? No CON7 Resis
  • Page 398-8. Refrigerator Fan Error (E rF) Symptom Check Point 1. E rF 1. Check the air f low 2. Check the PCB Fan motor voltage Duct CON7 CN1 CON201 CON6 CON6 CON3 CON2 CON5 CON1 TEST MODE 1 Voltage [V] CON6 8~12V 3rd pin ~ 5th pin CON6 Not 0V, 5V 1st pin ~ 5th pin - 39 -
  • Page 40Refrigerator Fan Error (E rF) 1 Reset the unit and 4 Input Test1 Mode. Replace (Push the button 1 time) Check the Fan Motor voltage No Main PCB Is Fan Motor voltage 8~12V? 2 TEST MODE 1 Voltage [V] Open the f reezer door and Check No Go to 3 CON6 the air f low. Windy? 8~12V 3rd pin ~ 5th pin Yes 5 C
  • Page 418-9. Freezer Fan Error (E FF) Symptom Check Point 1. E FF 1. Check the air f low 2. Check the Fan Motor 3. Check the PCB Fan motor voltage Fan Motor CON7 CN1 CON201 CON6 CON7 CON3 CON2 CON5 CON1 TEST MODE 1 Voltage [V] CON7 8~12V 10th pin ~ 12th pin CON7 Not 0V, 5V 8th pin ~ 12th pin - 41 -
  • Page 42Freezer Fan Error (E FF) 1 Reset the unit and 4 Input Test1 Mode. Replace (Push the button 1 time) Check the Fan Motor voltage No Main PCB Is Fan Motor voltage 8~12V? 2 TEST MODE 1 Voltage [V] Open the f reezer door and Check No Go to 3 CON7 the air f low. Windy? 8~12V 10hpin ~ 12th pin Yes 5 Change
  • Page 438-10. Icing Fan Error (E IF) Symptom Check Point 1. E IF 1. Check the air f low 2. Check the Connector 3. Check the PCB Fan motor voltage Air Flow Connector CON7 CN1 CON201 CON6 CON7 CON3 CON2 CON5 CON1 TEST MODE 1 Voltage [V] CON7 8~12V 3rd pin ~ 5th pin CON7 Not 0V, 5V 1st pin ~ 5th pin - 43 -
  • Page 44Freezer Fan Error (E IF) 1 Reset the unit and 4 Input Test1 Mode. Replace (Push the button 1 time) Check the Fan Motor voltage No Main PCB Is Fan Motor voltage 8~12V? 2 TEST MODE 1 Voltage [V] Open the f reezer door and Check No Go to 3 CON7 the air f low. Windy? 8~12V 3rd pin ~ 5th pin Yes 5 Change
  • Page 458-11. Condenser Fan Error (E CF) Symptom Check Point 1. E CF 1. Check the air f low 2. Check the Connector 2. Check the PCB Fan motor voltage Fan Motor CON7 CN1 CON201 CON6 CON7 CON3 CON2 CON5 CON1 TEST MODE 1 Voltage [V] CON7 8~12V 4th pin ~ 6th pin CON7 Not 0V, 5V 2nd pin ~ 6th pin - 45 -
  • Page 46Condenser Fan Error (E CF) 1 Reset the unit and 4 Input Test1 Mode. Replace (Push the button 1 time) Check the Fan Motor voltage No Main PCB Is Fan Motor voltage 8~12V? 2 TEST MODE 1 Voltage [V] Check the f an rotating. No Go to 3 CON7 Does f an rotate? 8~12V 4th pin ~6 th pin Yes 5 Change the Check
  • Page 478-12. Communication Error (E CO) Symptom Check Point 1. E CO 1. Check the loose connection 2. Check the Hinge connection CON7 CN1 CON201 CON6 CON3 CON2 CON5 CON1 CON101 CON5 Voltage [V] CON101 12V 1st pin ~ 2nd pin CON101 Not 0V, 5V 2nd pin ~ 3rd pin CON101 Not 0V, 5V 2nd pin ~ 4th pin CON5 Not 0V,
  • Page 48Communication Error (E CO) 4 Change the Check the voltage. Yes Main PCB Is CON101 2nd pin ~ 4th pin 1 voltage 0V or 5V? Check the loose connection Voltage [V] CON101 Not 2 CON101 2nd pin ~ 4th pin 0V, 5V Check the Check the voltage. No Hinge (loose Is CON101 1st pin ~ 2nd pin connection) No voltage
  • Page 498-13. Cube mode doesn’t work Symptom Check Point 1. Cube mode 1. Check the loose connection doesn’t work 2. Check the resistance CON1 CON2 Ice Maker Geared Motor Dispenser Motor - 49 -
  • Page 50LEVER S/W Voltage [V] Resistance [Ω] CON2 Pushing 112~115V Geared Motor 31.1 ~ 42.1 4thpin ~ Not Dispenser Motor 9.9 ~ 12.1 B(NEUTRAL) 0~2V Pushing CON1 Pushing 9~12V 12th pin ~ Not 13th pin 0~2V Pushing - 50 -
  • Page 51Cube mode doesn't work 4 Replace Check the resistance value. No Geared Motor 1 Is Geared Motor resistance Check the loose connection 31.1 ~ 42.1Ω? 2 Change the Geared Motor Check the voltage. No PCB (while pushing the lever S/W) Is voltage correct? Resistance [Ω] Geared Motor 31.1 ~ 42.1 Yes CON2 5
  • Page 528-14. Crush mode doesn’t work Symptom Check Point 1. Crush mode 1. Check the loose connection doesn’t work 2. Check the resistance CON1 CON2 Ice Maker Geared Motor Dispenser Motor - 52 -
  • Page 53LEVER S/W Voltage [V] Resistance [Ω] CON2 Pushing 112~115V Geared Motor 31.1 ~ 42.1 12th pin ~ Not Dispenser Motor 9.9 ~ 12.1 B(NEUTRAL) 0~2V Pushing CON1 Pushing 9~12V 12th pin ~ Not 13th pin 0~2V Pushing - 53 -
  • Page 54Crush mode doesn't work 4 Replace Check the resistance value. No Geared Motor 1 Is Geared Motor resistance Check the loose connection 31.1 ~ 42.1Ω? 2 Change the Geared Motor Check the voltage. No PCB (while pushing the lever S/W) Is voltage correct? Resistance [Ω] Geared Motor 31.1 ~ 42.1 Yes CON2 5
  • Page 558-15. Water mode doesn’t work Symptom Check Point 1. Water mode 1. Check the loose connection doesn’t work 2. Check the resistance valve CON2 Water Valve Pilot Valve CON2 LEVER S/W Voltage [V] CON2 Pushing 112~115V 11th pin ~ Not B(NEUTRAL) 0~2V Pushing CON2 Pushing 112~115V 10th pin ~ Not B(NEUTRAL
  • Page 56Freezer room lamp doesn’t work 1 4 Explain to Change the The Switch senses if the door is Yes No customer Check the LED Lamp voltage LED Lamp open or close. Is voltage 12V? When the door open, lamp On When the door Close, lamp Of f LED Lamp LED Lamp No 2 Yes Change the Check the door S/W resistance.
  • Page 578-16. Freezer room lamp doesn’t work Symptom Check Point 1. Freezer room lamp 1. Check the f reezer door switch sticky doesn’t work 2. Check the door S/W resistance 3. Check the LED Lamp LED Lamp CON7 CN1 LED Lamp CON201 CON6 CON3 CON2 CON5 CON1 CON6 Door S/W Resistance [Ω] Normal 0 Door S/W Push S/
  • Page 588-17. Refrigerator room lamp doesn’t work Symptom Check Point 1. Ref rigerator room 1. Check the Ref rigerator door switch sticky lamp doesn’t work 2. Check the door S/W resistance 3. Check the LED Lamp CON7 CN1 CON201 LED Lamp CON6 CON3 CON2 CON5 CON1 CON6 LED Lamp Door S/W Resistance [Ω] Normal 0
  • Page 59Refrigerator room lamp doesn’t work 1 4 Explain to Change the The Switch senses if the door is Yes customer Check the LED Lamp voltage No LED Lamp open or close. Is voltage 12V? When the door open, lamp On When the door Close, lamp Of f LED Lamp No 2 Yes Change the Check the door S/W resistance. No
  • Page 608-18. Poor cooling in Fresh food section Symptom Check Point 1. Poor cooling in Fresh 1. Check the sensor resistance f ood section 2. Check the air f low 3. Check the air Temperature 4. Check the R-Fan motor voltage CON7 CN1 CON201 CON6 Duct CON3 CON2 CON5 CON1 CON6 CON7 CON7 Resistance [Ω] 13th pin
  • Page 61Poor cooling in Fresh food section 4 Check the Check the air temperature. No Compressor and sealed 1 Is it cold? system Check the sensor resistance. Yes CON7 Go to 7 5 CON7 Replace Resistance [Ω] Check the Fan Motor voltage No Main PCB 13th pin ~ 14th pin Is Fan Motor voltage 8~12V? 23ºF / -5ºC 38k
  • Page 628-19. Poor cooling in Freezer compartment Symptom Check Point 1. Poor cooling in 1. Check the sensor resistance Freezer compartment 2. Check the air f low 3. Check the air Temperature 4.Check the Fan motor sticky 4. Check the Fan motor voltage CON7 CN1 CON201 Duct CON6 CON3 CON2 CON5 CON1 Fan Motor
  • Page 63Poor cooling in Freezer compartment 4 Check the No Compressor Check the air temperature. Is it cold? and sealed 1 system Check the sensor resistance. Yes 5 CON7 Change the Resistance [Ω] Check the Fan motor. Yes Fan motor 19th pin ~ 20th pin Rotate f an using hand. -22ºF / -30ºC 40k It f eel sticky?
  • Page 646 Replace Check the Fan Motor voltage No Main PCB Is Fan Motor voltage 8~12V? TEST MODE 1 Voltage [V] CON7 8~12V 10thpin ~ 12th pin Yes 7 Change the Check the Fan Motor voltage Yes motor Is Fan Feed Back voltage 1~5V? TEST MODE 1 Voltage [V] CON7 Not 0V, 5V 8th pin ~ 12th pin No 8 Explain to custome
  • Page 65o make TEST MODE push the test button on the Main PCB, the refrigerator will be enter the TEST MODE. * 1 time : Comp / Damper / All FAN on (All things displayed) Refrigerator Freezer * 2 times : Damper closed (22 22 displayed) Refrigerator Freezer * 3 times : Forced defrost mode (33 33 displayed) Re
  • Page 66TEMP RESISTANCE VOLTAGE -39°F (-40°C) 73.29 4.09 V -30°F (-35°C) 53.63 3.84 V -30°F (-21°C) 39.66 3.55 V -13°F (-25°C) 29.62 3.23 V -4°F (-20°C) 22.33 2.89 V 5°F (-15°C) 16.99 2.56 V 14°F (-10°C) 13.05 2.23 V 23°F (-5°C) 10.10 1.92 V 32°F (0°C) 7.88 1.63 V 41°F (+5°C) 6.19 1.38 V 50°F (+10°C) 4.91 1
  • Page 67TEMP RESISTANCE VOLTAGE -39°F (-40°C) 225.1 4.48 V -30°F (-35°C) 169.8 4.33 V -30°F (-21°C) 129.3 4.16 V -13°F (-25°C) 99.30 3.95 V -4°F (-20°C) 76.96 3.734 V 5°F (-15°C) 60.13 3.487 V 14°F (-10°C) 47.34 3.22 V 23°F (-5°C) 37.55 2.95 V 32°F (0°C) 30 2.67 V 41°F (+5°C) 24.13 2.40 V 50°F (+10°C) 19.53
  • Page 68The controller assembly is made up of two different kinds of parts. The fuse and the sensor. To determine if these parts are defective, check for resistance. The fuse will cut power to the defrost heater at very high temperatures. Set a ohmmeter to the 2 housing pin. Measure the 2 pin connected to F
  • Page 69Sheath heater is the part for defrost. All heating wire is connected to only one line. So we can decide part is defective or not when we check the resistance. (1) (2) Set a ohmmeter connect to The housing pins. Measure the pins connected to Sheath Heater. If the ohmmeter indicates (V°øV)/Watt=R is o
  • Page 70Sheath heater is the part for defrost. All heating wire is connected to only one line. So we can decide part is defective or not when we check the resistance. (1) (2) Set a ohmmeter connect to The housing pins. Measure the pins connected to Sheath Heater. If the ohmmeter indicates (V°øV)/Watt=R is o
  • Page 71Sheath heater is the part for defrost. All heating wire is connected to only one line. So we can decide part is defective or not when we check the resistance. (1) (2) Set a ohmmeter connect to The housing pins. Measure the pins connected to Sheath Heater. If the ohmmeter indicates (V°øV)/Watt=R is o
  • Page 7210-4 Door Switch 10-4-1 Door Switch,R 0Q %JGEMKPI(NQY 4GUWNV58%#EVKQP ඖ %JGEM4GGF5YKVEJ 7KH6ZLWFKVHQVHVLIWKHGRRULVRSHQRUFORVH :KHQWKHGRRURSHQODPS2Q :KHQWKHGRRU&ORVHODPS2II  ȄFORVH'RRUDQGFKHFNWKHODPS7KURXJKWKHJDS ඖ Check Voltage between pin 13 and 14 6WDWXV
  • Page 730Q %JGEMKPI(NQY 4GUWNV58%#EVKQP ೘ %JCPIG4GGF59 4GOQXGUETGY 'LVDVVHPEOH +RXVLQJ Push Hook Push Hook &KHFN5HVLVWDQFHRI5HHG6:LILWLV1*FKDQJH LW 1XPEHU  $VVHPEOH 5HHG6:WRKLQJH FRYHU DQG$VVHPEOH5HHG6:+RXVLQJ Push second Push first  $VVHPEOH 6FUHZWRKL
  • Page 7410-4-2 Door Switch,F 0Q %JGEMKPI(NQY 4GUWNV58%#EVKQP ඖ %JGEMVJG(TGG\GTFQQTUYKVEJ The Switch senses if the door is open or close. .When the door open, lamp On .When the door Close, lamp Off  ȉ close Door and check the lamp Through the gap ඖ Check Voltage between pin 21 and 22 6WDWXV 5HVXOW
  • Page 750Q %JGEMKPI(NQY 4GUWNV58%#EVKQP ೘ %JCPIG4GGF59 4GOQXGUETGYCPFFKXKFGJQWUKPI &KXKFG4GGF59 Push 3XVKWKHSDUWRIKRRN DQGGLYLGH 5HHG6: &KHFNWKH5HHG6:UHVLVWDQFHDQG LILWLV1*&KDQJHLW 1XPEHU   2WUJVJG4GGF59 VQFKTGEVKQPQHVJGCTTQY First push Secon
  • Page 76- Dispenser DC Motor : When customer push the dispenser button, Pull duct door and abstract from ice bank. (1) (2) Dispensor DC Motor Dispenser DC Motor Test Points Result (1) to (2) 9.9 ~ 12.1 - 76 -
  • Page 77The motor in the door pushed the ice into the dispenser. < In-door Motor > < In-door Motor > 1 Separate the 1 Separate the housing. housing. 2 Measure the 2 Measure the resistance between resistance between (1) and (2) (1) and (3) (1) (2) (1) (3) Check the resistance between connectors (In-door moto
  • Page 78The damper supplies cold air from the freezer to the chill room using the damper plate. The chill room is colder when the damper plate is open. When the damper is closed the chill rooms temperature will rise. < Damper Circuit > 1 Blue 1 Blue 2 Red 3 White 3 White 3 Yellow Check the 1 , 3 < extension
  • Page 79The lamp socket connect cover lamp assembly to lamp. The lamp socket fix lamp and unite lamp and cover lamp assembly. The lamp socket supply electric source to lamp also. (1) (2) (3) (4) Check the resistance between connector of housing and connector of lamp socket. It means check whether or not app
  • Page 80Flow Sensor (in machine room) Count the water quantity from city water to water filter in refrigerator Flow Sensor (in machine room) Test Points Result Red wire to Black wire 4 ~ 30 - 80 -
  • Page 81Protection Logic TEST 1 Mode Con201 Time>30sec Y Power On PCB OK Disconnect & V≒200 N Replace Driver PCB Check Voltage about 200V past 30second after turn on Comp Ref. Display & sound Refer FLB075(A-Inverter) orced Starting TDC (Full Stroke) Display ON, Buzz 1 time ting LED blink 8 Reset LED blink 8
  • Page 82Board located in the PCB case. river is PC board for the compressor. ows the source voltage of the driver PC board. n PCB Cover Step2. Check Driver PCB LED Lamp ocated in machine room. - 82 -
  • Page 83Check to make sure compressor is receiving voltage from IPM - In order to determine whether the compressor is operating normally, check the output voltage during the refrigeration cycle. - After initial power-up, when the compressor begins to operate, wait 10 minutes before checking. - The compresso
  • Page 84s once, then repeats (FCT0 Fault: A-Inverter) Protection Logic OFF tecting motor current and voltage error e at point A (Motor Voltage), point B (Motor Current) and Point C (Capacitor n compressor is off. GND A, B, & C 2.5V 0.3V Voltage Blink 1 time (FCT 0) Check B1 Out of spec? Y (2.2 - 2.8V) Repla
  • Page 85OFF Blink Blink Blink OFF event over voltage and current detecting connecting error. nnecting error of PCB and Comp, Capacitor harness -. Comp insulation damage. ressor is forced off and tries to restart within 40 seconds. otection Blink 3 times logic (No Connect Trip) Check B3 N heck B Fix Harness
  • Page 86link Blink OFF detect locked piston of oil to the cylinder, cylinder or piston damaged and or restricted discharge. ton can also be caused by foreign materials inside the compressor. ressor is forced off and tries to restart within 2.5 minutes. tion Replace Blink 5 times c Compressor (Lock Piston Tr
  • Page 87Blink Blink Blink Blink OFF vent high current due to IPM Short aged IPM (Dead Short) ad short at Point A with a VOM. ressor is forced off and tries to restart in 20 seconds. Blink 7 times (Lock Piston Trip) Check B5 Y Check IPM Short N Compressor Replace visual inspection Test Doesn’t work Drive PCB
  • Page 88Blink Blink Blink Blink Blink OFF detect Set control Micom and communication error munication Error blink. (Compressor runs reference value before occuring communication Error) 1. Check Temp.&Sound Pressure 2. Check whether or not C-Fan Works of comp and D-pipe Protection Blink 8 times logic (Commun
  • Page 89onnection Check Check Process Specifications or Check r off. Step 2. Check capacitor spec. (table1). Step3. Check resistance of point A ep 4. Check wire harness (INF ohm). Step 5. Check resistance at point B. Step 6. Point D. Check Y Resistance Y Check Y Harness Power wiring to Capacitor at Point A
  • Page 90rotection logic Cycle check with protection logic heck Condenser fan and Freezer fan before performing Check D n, Current trip and stroke trip can be activated by other problems then the driver or compressor. → When process line on compressor is opened, and refrigerant is not expelled High Pressure
  • Page 91NG HIGH VOLTAGE PCB cover Step 2) Check for blinking frequency of LED and PCB LED Lamp When compressor is normal, it does not blink : Refer to the next page to find out what actions to take according to how many times LED blink - 91 -
  • Page 921. Please check, Whether PCB Parts connector of defect or compressor is attached o - time repetiton (Stroke Trip) Compress rightly or not. after or power off Connector 2. After the first action, miss You check on normal on - off - on - on - off - on - on - off repeating connecting operation of (Pist
  • Page 93T POINTS TO BE CHECKED REMEDY • Is the power cord unplugged from the outlet? • Plug into the outlet. • Check if the power switch is set to OFF. • Set the switch to ON. • Check if the fuse of the power switch is shorted. • Replace the fuse. • Measure the voltage of the power outlet. • If the voltage
  • Page 94ooting Chart TEMPERATURE STATE OF STATE OF THE OF THE E REMARKS THE UNIT EVAPORATOR COMPRESSOR IAL Freezer Low flowing sound of A little higher than • Refrigerant level is low due AGE compartment and Refrigerant is heard ambient to a leak. Refrigerator don't and frost forms in temperature. • Normal
  • Page 95“Not Cooling” Complaint All components operating, No airflow problems, Not frosted up as a defrost problem problem has been isolated to sealed system area Partial Frost None Pattern? Equalization Equalization Test Test y Fast Very Slow Very Slow Fast Very Fast fficient Partial Complete pressor Restr
  • Page 96Power On Start Position • Adjusts EJECTOR to Start Position with power on. Icemaking • Walls until water becomes cold after starting the Mode icemaking operation. Full Ice • Check if the ice bin is full. Check Full Ice? • Runs MOTOR to drop ice from the tray into the ICE BIN. Harvest • Performs Ice
  • Page 97ker not making ice or not making enough ice (Environmental Diagnosis) n’t make ices itself. Basically, water, temperature and time are needed. o Water, then no Ice. re : The compartment, where the icemaker is located, has to be at least 1°F so that icemaker dumps ices to the bin. east 35 minutes mus
  • Page 98- 98
  • Page 99- 99
  • Page 100motor has high and standar speed. erator is overloaded, fan motor runs in high speed as powered-up Standard speeds is used for general cooling speed, the RPM of freezer fan motor changs from normal speed to high. ing Fan Motor fan is switched ON and OFF in conjunction with the compressor. sensing me
  • Page 101tarts each time the COMPRESSOR running time Betwee 7~50 hours. tops if the sensor temperature reaches 41°F(5°C) or more. If the sensor doesn’t reach 41°F(5°C) in 1 hours, mode is malfunctioning. (Refer to the defect diagnosis function) on’t function if its sensor is defective (wires are cut or short
  • Page 102Use the part number to order part, not the position number. 603C S04 503E 603E 626A 624E 207B 624G 402A S11 503D 624C 500P S04 409D 158A 103B 271B 610F S11 S04 103A S04 207A 2 282G 402A 610D 406D 120A B01 409H 628A 631C 631A 405E 405J 405K 271D 327B S10 500A 145B 145A 404C 405G 405L S11 120B 313A 40
  • Page 103Use the part number to order part, not the position number. 145G 145C 145J 145K S04 131A 249M 136C 136B 133C 249L S04 132Q 145M 136E 134A 133C 145J 145H 132P 237C 136A
  • Page 104Use the part number to order part, not the position number. 141H 142B 141A 142D 142A 141F 141B 141H 141H 141A 141F 141B 141F 141B 255B 255A 154D 177C 255A 132P 177E 161C 161B 177D 133E 161A 133E 146E 151B 151C 151A 162B 162A 145D
  • Page 105Use the part number to order part, not the position number. 205F 500C 241A 180A 241C B 233B 233A 231A 241K 235A 212G 241B B06 B06 241K 241E 241K 241E 312B 205E B06 B06 243D 262C 243A 244A 624A 244A 405M 262E 619C 409I 619B 615A 405M 253A 250B 250A 250K S05 200A 249E 250F 250B 206K B06 249J 206L 212D
  • Page 106Use the part number to order part, not the position number. 276A 276G 276F 276I 405A 276B 275A 278C 279A 278D 2C 279K 279L 501D 279B 281A 501A 279C
  • Page 107Use the part number to order part, not the position number. 617A 625A 616G 616G 623B S04 616J 623B 616J 627B 603C S04 S04 627A 619A 603B
  • Page 108Use the part number to order part, not the position number. 630J 630J 612A 630F 630B 630C 600A 611A 607A 630A 630H 630D 606A 630E 630Q 630G
  • Page 1098601 SEP., 2014 Printed in Kore