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Lg Lfxs30766 Page 91

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11-1 Check A
- There is PC Board located in the PCB case.
The control driver is PC board for the compressor.
- This step shows the source voltage of the driver PC board.
* Driver PCB located in machine room.
Step1. Open PCB Cover
Step2. Check Driver PCB
LED Lamp
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Contents Summary of Lg Lfxs30766

  • Page 1REFRIGERATOR SERVICE MANUAL CAUTION BEFORE SERVICING THE UNIT, READ THE SAFETY PRECAUTIONS IN THIS MANUAL. MODEL : L  FXS30766* COLOR : STAINLESS(ST)
  • Page 2CONTENTS SAFETY PRECAUTIONS .................................................................................................................................... 2 1. SPECIFICATIONS .......................................................................................................................
  • Page 31. SPECIFICATIONS 1-1 LFXS30766* ｡ﾜ 29.6 cu.ft. ITEMS SPECIFICATIONS ITEMS SPECIFICATIONS DOOR DESIGN Side Rounded VEGETABLE TRAY Clear Drawer Type DIMENSIONS (inches) 35 3/4 X 36 1/4 X 70 1/4 (WXDXH) 29.6cu.ft. COMPRESSOR Linear NET WEIGHT (pounds) 160kg (353lb) EVAPORATOR Fin Tube Type COOLING SYS
  • Page 42. PARTS IDENTIFICATION Icemaker Ice Bin Ice Compartment Door -4-
  • Page 53. DISASSEMBLY 3-1 REMOVING AND REPLACING REFRIGERATOR DOORS ｡ﾜ Removing Refrigerator Door CAUTION: Before you begin, unplug the refrigerator. Remove food and bins from doors. ｢ｺ Left Door -FIG. 2 1. Disconnect water supply tube by pushing back on the disconnect ring (3).-FIG. 1 2. Open door. Loosen
  • Page 63-2 DOOR ｡ﾜ Door Gasket Replacement ｡ﾜ Mullion Removal 1. Insert gasket into channel Insert and press gasket into channels at doorliner. 1. Remove 2 screws. 2. Lift mullion up carefully. ｡ﾜ Mullion Replacement 1. Connect wire harness. 3. Disconnect wire harness. 2. Insert mullion into channel. Inser
  • Page 7-7
  • Page 83-4 Door Alignment * Ice Fan Assembly Replacement If the level of refrigerator doors is uneven, follow the 1) Remove the plastic guide for slides on left side by instructions below to align the doors: unscrewing phillips head screws. Turn the leveling legs (CW) to raise or (CCW) to lower the 2) Pull
  • Page 93-7 Refrigerator Light (Top) 3-7-2 Refrigerator Light (Side) Unplug Refrigerator, or disconnect power at the circuit 1. Unplug refrigerator power cord from electric outlet. breaker. 2. Put flat screwdriver into sevice hole and remove cover of If necessary, remove top shelf or shelves. refrigerator l
  • Page 103-7-3 Cap Decor LED LAMP(Bottom) 3-8 MULTI DUCT 1. Unplug refrigerator power cord from electric outlet. 1. Remove 2 screws and guide rail. 2. Open the refrigerator door to need diassembly. 3. Put flat screwdriver into service hole, remove the cover of cap decor LED LAMP. 2. Remove the upper and lowe
  • Page 113-9 DISPENSER 3-11 ICE BUTTON ASSEMBLY 1) Remove the 1 screw holding the lever. 2) Remove the spring from the hook. 3) Push and pull on the tab to remove. 1) Pull out the drain 2) Holding the inner side of the dispenser pull Button Lever forward to remove. 3-12 WATER BUTTON ASSMEBLY 1) Remove 3 scre
  • Page 123-14 Icemaker replacement 3-15 Cap Duct Motor Replacement 1) Remove 3 screws marked in the picture below. 1) Separate the Housing of the Cap Duct Motor. 2) Unscrew 3 screws to disassemble the motor. 2) Grasp the bottom of motor cover assembly and pull it out slowly to remove. 3) When replacing the m
  • Page 133-16 HOW TO REMOVE ICE BIN 3-17 HOW TO PLACE ICE BIN IN POSITION 1) Grip the handles, as shown in the picture. 1) Insert the Ice Bin, slightly tilting it to avoid touching the Icemaker. (Especially, Ice-Detecting Sensor) Note) Before remove ice bin, put on clean golves for 2) Lift the lower part sli
  • Page 143-18 HOW TO REMOVE AND REINSTALL THE PULLOUT DRAWER 3-18-1 Follow Steps to Remove Step 1) Open the freezer door. Step 2) Remove the lower basket. Step 3) Remove the two screws from the guide rails (one Step 4) Removal of the freezer door is done by l ifting clear from each side). of the rail support
  • Page 153-18-2 Follow Steps to Reinstall Step 1) Insert both side of supporter cover tv into connector Step 2) ｨ Assemble a bar and gear ice with screw. rails, and then screw them. ｨ Push the otherside of the gear to inside of the bar. Step 3) Put gear ice assembled with the bar by screw into Step 4) Insert
  • Page 163-19 WATER VALVE DISASSEMBLY METHOD 3-20 FAN MOTOR ASSEMBLY AND 1) Turn off the water to unit. Remove the waterline from the DISASSMEMBLY METHOD valve. 1) Remove screws for the Drain Pipe Assembly and the 1 connected to the Motor Cover. 2) Remove cover and 1 screw from the valve. Mechanical Cover 2)
  • Page 173-21 PULL OUT DRAWER Top Drawer 1. Use a flat blade screwdriver to push the tab in on the left rail and push the tab on the right rail in with your finger. Once the tabs have been pushed in, you can lift the tray up and out. 2. Pull both rails out to the full extension and insert the insert the back
  • Page 183-22 CAUTION : Sealed System Repair Before making a sealed system repair : Start with the power cord unplugged from the outlet. Plug in the power cord and between 6 and 12 seconds after it has been pugged in, unplug it from the power source. this will allow both sides of the 3 way valve to be opened
  • Page 193-24 HOW TO REMOVE AND REINSTALL THE HOMEBAR 3-24-1 CASE ASSEMBLY, HOME BAR 3-24-2 DOOR BASKET OF HOME BAR DOOR The Home Bar is removable for easy cleaning and The Door Baskets are removable for easy cleaning and adjustment. adjustment. 1. To remove the Home Bar, Slopingly lifts the Home Bar 1. To r
  • Page 203-24-4 COVER FRONT The Cover Front is removable for easy cleaning and adjustment. 1. To remove the Cover Front, simply lifts the basket doorr up and pulls slopingly out. 2. Remove two screws of The Cover Front and pull slopingly straight out. NOTE : To replace the Cover Front and basket door, Slide
  • Page 213-26 HOW TO REMOVE AND REINSTALL THE DOOR FOAM ASSEMBLY, REFRIGERATOR 1. Remove the Screw of Right Hinge Cover. 2. Remove two Wire connectors. 3. Rotate the hinge lever clockwise. 4. Separate the Home Bar. 5. Pull THE DOOR FOAM ASSEMBLY, REFRIGERATOR up and out. - 21 -
  • Page 223-27 HOW TO REMOVE FRAME DOOR SWITCH OF DOOR FOAM 1. Remove screws on hinge assebmbly, Upper 2. Separate the Cap,decor on the frame door. 3. Press the hook of door switch, 4. Remove a wire connector for change. Then pushes it outward. - 22 -
  • Page 233-28 HOW TO REMOVE THE HOME BAR DOOR 1. Remove the screw located on the top of hinge. 2. Remove the cap hinge(upper) Cap Hinge(Upper) 3. Remove the bar by pushing it up from the 4. Pull out the bar thought the top hinge. bottom through the SVC hole (bottom hinge). Bar SVC Hole 5. Separate the Cover.
  • Page 244. ADJUSTMENT 4-1 COMPRESSOR 4-2-3 Compressor protection logic 4-1-1 Role ｡ﾜ Since linear Comp conducts linear reciprocating motion, we have protection logic for compressor, motor and PCB The compressor intakes low temperature and low pressure as the below. gas from the evaporator of the refrigerato
  • Page 255. CIRCUIT DIAGRAM - 25 -
  • Page 266. TROUBLESHOOTING - 26 -
  • Page 27- 27
  • Page 287. 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 - 28 -
  • Page 297-3. Sub PCB - 29 -
  • Page 308. 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 31Freezer Sensor Error (E FS) 1 4 Reconnect or Change the Is the Connector disconnected Yes repair the Check the Temperature and Yes Sensor or loose between Main PCB and connector resistance refer to the table. sensor? No problem? CON7 No 2 No Change the Yes Sensor 5 Check the Sensor resistance. Is re
  • Page 328-2. 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 32º
  • Page 33Refrigerator Sensor Error (E rS) 1 4 Reconnect or Change the Is the Connector disconnected Yes repair the No Sensor Check the Temperature and or loose between Main PCB and connector resistance refer to the table. sensor? No problem? CON7 No Yes 2 Change the Yes Sensor 5 Check the Sensor resistance.
  • Page 348-3. 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 35Icing Sensor Error (E IS) 1 4 Reconnect or Change the Is the Connector disconnected Yes repair the Check the Temperature and Yes Sensor or loose between Main PCB and connector resistance refer to the table. sensor? No problem? CON5 No 2 Yes Change the Yes Sensor 5 Check the Sensor resistance. Is res
  • Page 368-4. 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 37Defrost 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 388-5. 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 39Defrost 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 408-6. 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 41Defrost Heater Error (F dH) 1 4 Input Test 3 Mode Replace the (Push the button 3 times) 1. Check the Check the Door gasket . Yes Door gasket Check the Heater Voltage. No input Voltage Is door gasket damaged? Is voltage 112~116V? 2. Replace Main PCB No 2 Change TEST MODE 3 Voltage [V] No Fuse-M Check
  • Page 428-7. 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 43Defrost Heater Error (r dH) 1 4 Input Test 3 Mode Replace the (Push the button 3 times) 1. Check the Check the Door gasket . Yes Door gasket Check the Heater Voltage. No input Voltage Is door gasket damaged? Is voltage 112~116V? 2. Replace Main PCB No 2 Change TEST MODE 3 Voltage [V] No Fuse-M Check
  • Page 448-8. 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 - 44 -
  • Page 45Refrigerator 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 Yes Go to 4 CON6 the air f low. Windy? 8~12V 3rd pin ~ 5th pin Yes 5
  • Page 468-9. 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 - 46 -
  • Page 47Freezer 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 Yes Go to 4 CON7 the air f low. Windy? 8~12V 10hpin ~ 12th pin Yes 5 Chang
  • Page 488-10. 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& 5 th pin CON7 Not 0V, 5V 1st pin & 5th pin - 48 -
  • Page 49Freezer 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 Yes Go to 4 CON7 the air f low. Windy? 8~12V 3rd pin ~ 5th pin Yes 5 Chang
  • Page 508-11. Condenser Fan Error (E CF) Symptom Check Point 1. E CF 1. Check the air f low 2. Check the Connector 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 4th pin & 6th pin CON7 Not 0V, 5V 2nd pin & 6th pin - 50 -
  • Page 51Condenser 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] Go to 4 Check the f an rotating. Yes CON7 Does f an rotate? 8~12V 4th pin ~6 th pin Yes 5 Change the Chec
  • Page 528-12. 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 53Communication 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 548-13. 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 - 54 -
  • Page 55LEVER 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 - 55 -
  • Page 56Cube 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 578-14. 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 - 57 -
  • Page 58LEVER 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 - 58 -
  • Page 59Crush 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 608-15. 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 61Water mode doesn't work 1 3 Check the loose connection Replace Check the resistance value. No P/ Valve Is Pilot Valve resistance 360~420Ω? 2 Change the Check the voltage. No PCB (while pushing the lever S/W) Is voltage correct? Pilot Valve Resistance [Ω] CON2 Pilot Valve 360~420 LEVER S/W Voltage [V
  • Page 628-16. 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 Duct CON6 CON3 CON2 CON5 CON1 CON6 CON7 CON7 Resistance [Ω] 13th pin
  • Page 63Poor 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 648-17. Refrigerator room lamp doesn’t work Symptom Check Point 1. Ref rigerator room 1. Check the Refrigerator door switch lamp doesn’t work 2. Check the door S/W resistance 3. Check the LED Lamp CON7 CN1 CON201 LED Lamp CON6 CON3 CON2 CON1 CON5 CON6 LED Lamp Door S/W Resistance [Ω] Normal 0 Door S/W
  • Page 65Refrigerator room lamp doesn’t work 1 4 Explain to Change the Yes Check the PCB Voltage. No The Switch senses if the door is customer PCB Is CON6 28th pin & 30th pin open or close. voltage 0~2V? (While door When the door open, lamp On When the door Close, lamp Of f closed) CON6 No 2 Change the Check
  • Page 668-18. Freezer lamp doesn’t work Symptom Check Point 1. Freezer room lamp 1. Check the f reezer door switch 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/W Infinity V
  • Page 67Refrigerator room lamp doesn’t work 1 4 Explain to Change the Yes Check the PCB Voltage. No The Switch senses if the door is customer PCB Is CON6 28th pin & 30th pin open or close. voltage 0~2V? (While door When the door open, lamp On When the door Close, lamp Of f closed) CON6 No 2 Change the Check
  • Page 688-19. 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 69Poor 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 706 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 718-20. Wi-Fi Modem Error (E Od) Symptom Check Point 1. E Od 1. Check the loose connection 2. Check the voltage J3 J1 - 71 -
  • Page 72:L)L0RGHP(UURU (2G 3 1R &KDQJHWKH &KHFNWKHYROWDJH :L)L0RGHP ,V-VWSLQa WKSLQYROWDJH9" 1 Voltage[v] J3 3.3V &KHFNWKHORRVHFRQQHFWLRQ 1st pin~9 th pin
  • Page 739. Reference 9. TEST MODE and Removing TPA 1. How to make TEST MODE If you 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
  • Page 749-2 TEMPERATRUE CHART - FREEZER AND ICING SENSOR TEMP RESISTANCE VOLTAGE -39°F (-40°C) 73.29 ｧﾚ 4.09 V -30°F (-35°C) 53.63 ｧﾚ 3.84 V -30°F (-21°C) 39.66 ｧﾚ 3.55 V -13°F (-25°C) 29.62 ｧﾚ 3.23 V -4°F (-20°C) 22.33 ｧﾚ 2.89 V 5°F (-15°C) 16.99 ｧﾚ 2.56 V 14°F (-10°C) 13.05 ｧﾚ 2.23 V 23°F (-5°C) 10.10 ｧﾚ
  • Page 759-3 TEMPERATRUE CHART - REFRIGERATOR AND DEFROST SENSOR TEMP RESISTANCE VOLTAGE -39°F (-40°C) 225.1 ｧﾚ 4.48 V -30°F (-35°C) 169.8 ｧﾚ 4.33 V -30°F (-21°C) 129.3 ｧﾚ 4.16 V -13°F (-25°C) 99.30 ｧﾚ 3.95 V -4°F (-20°C) 76.96 ｧﾚ 3.734 V 5°F (-15°C) 60.13 ｧﾚ 3.487 V 14°F (-10°C) 47.34 ｧﾚ 3.22 V 23°F (-5°C)
  • Page 7610. COMPONENT TESTING INFORMATION 10-1 Defrost Controller Assembly Function The 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 tempera
  • Page 7710-2 Sheath Heater (Freezer Room) Function Sheath 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. How to Measure (1) (2) Set a ohmmeter connect to The housing pins. Measure the pins connected to S
  • Page 7810-3 Sheath Heater (Freezer Room) Function Sheath 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. How to Measure (1) (2) Set a ohmmeter connect to The housing pins. Measure the pins connected to S
  • Page 7910-4 L-cord Heater (Refrigerator Room) Function L-cord 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. How to Measure (1) (2) Set a ohmmeter connect to The housing pins. Measure the pins connected
  • Page 8010-5 Door Switch 10-5-1 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 810Q %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 8210-5-2 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 830Q %JGEMKPI(NQY 4GUWNV58%#EVKQP ೘ %JCPIG4GGF59 4GOQXGUETGYCPFFKXKFGJQWUKPI &KXKFG4GGF59 Push 3XVKWKHSDUWRIKRRN DQGGLYLGH 5HHG6: &KHFNWKH5HHG6:UHVLVWDQFHDQG LILWLV1*&KDQJHLW 1XPEHU   2WUJVJG4GGF59 VQFKTGEVKQPQHVJGCTTQY First push Secon
  • Page 8410-5-3 H/Bar Door Switch 0Q %JGEMKPI(NQY 4GUWNV58%#EVKQP ඖ %JGEM4GGF5YKVEJ 7KH6ZLWFKVHQVHVLIWKHGRRULVRSHQRUFORVH :KHQWKHGRRURSHQODPS2Q :KHQWKHGRRU&ORVHODPS2II  Ȅ&ORVH'RRUDQGFKHFNWKHODPSWKURXJKWKHJDS ඖ Check Voltage between pin 13 and 14 &KHFN 5HHG6: ,Q
  • Page 85No. Checking Flow Result & SVC Action ೘ Change Reed S/W - . Remove screw(8EA) - . Disassemble R/L Door - . Remove screw(1EA) 4 - . Disassemble Cap Deco - . Push Hook and Disassemble Housing Push - . Check the Reed S/W resistance and if it is NG, Change it (Number 3) - . Assemble in reverse order how
  • Page 8610-6 Dispenser DC Motor Function - Dispenser DC Motor : When customer push the dispenser button, Pull duct door How to Measure (1) (2) Dispensor DC Motor Standard Dispenser DC Motor Test Points Result (1) to (2) 9.9 ~ 12.1ｧﾙ - 86 -
  • Page 8710-7 AC Motor ASSEMBLY Function The motor in the door pushed the ice into the dispenser. How to < In-door Motor > < In-door Motor > Measure 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
  • Page 8810-8 Damper Function The 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. How to Measure < Damper Circuit > 1 Blue 1 Blue 4 Yellow 3 White 3 Whi
  • Page 8910-9 Flow Sensor Function Flow Sensor (in machine room) Count the water quantity from city water to water filter in refrigerator How to Measure Flow Sensor (in machine room) Standard Test Points Result Red wire to Black wire 4 ~ 30 kｧﾙ - 89 -
  • Page 9011. Compressor Troubleshooting PCB Check (Simplify) Protection Logic TEST 1 Mode A-inverter Con201 Time>30sec Y Power Off Power On PCB OK Disconnect & V¡Ö200 N Replace Driver PCB Check Voltage about 200V past 30second after turn on Test Mode Comp Ref. Display & sound Refer FLB075(A-Inverter) TEST1 F
  • Page 9111-1 Check A - There is PC Board located in the PCB case. The control driver is PC board for the compressor. - This step shows the source voltage of the driver PC board. Step1. Open PCB Cover Step2. Check Driver PCB LED Lamp * Driver PCB located in machine room. - 91 -
  • Page 92IPM Output check - Measure the voltage between the POWER and COMM pins of the connector as shown below. Check 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 i
  • Page 9311-2 Check B B1. LED blinks once, then repeats (FCT0 Fault: A-Inverter) Protection Logic Blink OFF Blink OFF - Purpose: Detecting motor current and voltage error - Check voltage at point A (Motor Voltage), point B (Motor Current) and Point C (Capacitor Voltage) when compressor is off. GND - Spec: Po
  • Page 94B3. LED blinks three times, then repeats (Stroke Trip) Protection Logic Blink Blink Blink OFF Blink Blink Blink OFF - Purpose : Prevent over voltage and current detecting connecting error. - Cause : -.Connecting error of PCB and Comp, Capacitor harness -. Comp insulation damage. - Logic : Compressor
  • Page 95B4. LED blinks five times, then repeats (Locked Piston: A & E Inverters) Protection Logic Blink Blink Blink Blink Blink OFF - Purpose: To detect locked piston - Cause: Lack of oil to the cylinder, cylinder or piston damaged and or restricted discharge. A Locked Piston can also be caused by foreign m
  • Page 96B6. LED blinks seven times, then repeats (IPM Fault: A & E Inverters) Blink Blink Blink Blink Blink Blink Blink OFF - Purpose: Prevent high current due to IPM Short - Cause: Damaged IPM (Dead Short) - Test for a dead short at Point A with a VOM. - Logic: Compressor is forced off and tries to restart
  • Page 97B7. LED Blinks eight times, then repeats (Communication Error) Blink Blink Blink Blink Blink Blink Blink Blink OFF - Purpose: To detect Set control Micom and communication error - Cause : Communication Error - Logic : LED blink. (Compressor runs reference value before occuring communication Error) 1
  • Page 9811-3 Check C C1. Harness Connection Check Check Process C2. Capacitor Specifications C3. Compressor Check - Step 1. Power off. Step 2. Check capacitor spec. (table1). Step3. Check resistance of point A Step 4. Check wire harness (INF ohm). Step 5. Check resistance at point B. Step 6. Point D. Check
  • Page 9911-4 Check D D1. Activate Protection logic Cycle check with protection logic - We have to check Condenser fan and Freezer fan before performing Check D - Locked Piston, Current trip and stroke trip can be activated by other problems then the driver or compressor. →When process line on compressor is
  • Page 100Compressor Troubleshooting WARNING HIGH VOLTAGE Step 1) Open 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 - 100 -
  • Page 101No LED operating condition Cause Service guideline 1. Please check, Whether connector of compressor is attached LED two - time repetiton (Stroke Trip) rightly or not. after power off 1 PCB Parts 2. After the first action, defect or You check on normal ｡ﾜ ｡ﾜ on - on - off - on - on - off - on - on
  • Page 10211-5 SERVICE DIAGNOSIS CHART COMPLAINT POINTS TO BE CHECKED REMEDY No Cooling. • 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 t
  • Page 10311-6 REFRIGERATION CYCLE ｡ Troubleshooting Chart TEMPERATURE STATE OF STATE OF THE OF THE CAUSE REMARKS THE UNIT EVAPORATOR COMPRESSOR PARTIAL Freezer Low flowing sound of A little higher than • Refrigerant level is low due LEAKAGE compartment and Refrigerant is heard ambient to a leak. Refrigerator
  • Page 10411-6-2 SEALED SYSTEM DIAGNOSIS “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 Very Fast Very Slow Very Slow Fast Very Fast Ineff
  • Page 10512. ICEMAKER OPERATING METHOD AND TROUBLE SHOOTING 12-1 Icemaker’s Basic Operating Method Power 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
  • Page 10612-2 Trouble Shooting Ice & Water system Issues 12-3 Icemaker not making ice or not making enough ice (Environmental Diagnosis) ｢ｺ Icemaker can’t make ices itself. Basically, water, temperature and time are needed. - Water : If no Water, then no Ice. - Temperature : T  he compartment, where the ice
  • Page 10713. DESCRIPTION OF FUNCTION & CIRCUIT OF MICOM - 107 -
  • Page 108- 108
  • Page 10913-1-10 CONTROL OF FREEZER FAN MOTOR 1. Freezer fan motor has high and standar speed. 2. When refrigerator is overloaded, fan motor runs in high speed as powered-up Standard speeds is used for general purposes. 3. To improve cooling speed, the RPM of freezer fan motor changs from normal speed to hig
  • Page 11013-1-16 Defrosting (removing frost) 1. Defrosting starts each time the COMPRESSOR running time Betwee 7~50 hours. 2. Defrosting stops if the sensor temperature reaches 41°F(5°C) or more. If the sensor doesn’t reach 41°F(5°C) in 1 hours, the defrost mode is malfunctioning. (Refer to the defect diagno
  • Page 11114. EXPLODED VIEW & REPLACEMENT PARTS LIST CASE PARTS CAUTION : Use 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 282G S02 402A 501F 610D 406D 120A B01 409H 628A 631C 631A 405J
  • Page 112FREEZER PARTS CAUTION: Use the part number to order part, not the position number. 145G 145C 145J 145K S04 131A 249M 136C 136B 133C 145F 249L S04 132Q 145M 136E 134A 133C 145J 145H 132P 237C 136A
  • Page 113REFRIGERATOR PARTS CAUTION: Use the part number to order part, not the position number. 141H 142B 143A 141A 142D 142A 141F 141B 141H 141H 141A 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 114DOOR PARTS CAUTION: Use the part number to order part, not the position number. 207D 250W 232A 281K 312F 241B 500C 231B 233B 312G 241K 281B 241B 235A 207C 146F 281K B06 312E 241K 241A 624A 405M 241K 262E 409I 241J 233A 312B 402B 271E B06 243C 619C WSZ064 262C 244A 619B 212G 615A 232B 243B 241N 241E
  • Page 115DISPENSER PARTS CAUTION: Use the part number to order part, not the position number. 276A 276G 276F 276I 405A 276B 275A 278C 279A 278D 402E 402C 279K 279L 501D 410S 501J 279B 281A 501A 279C
  • Page 116VALVE & WATER TUBE PARTS CAUTION: Use 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 117ICE MAKER & ICE BIN PARTS CAUTION: Use 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 118P/No. MFL68488632 MAY, 2015 Printed in Kore