LG LMXS28596 Series Service Manual
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LG LMXS28596 Series Service Manual

LG LMXS28596 Series Service Manual

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REFRIGERATOR
SERVICE MANUAL
CAUTION
BEFORE SERVICING THE UNIT,
READ THE SAFETY PRECAUTIONS IN THIS MANUAL.
Any reproduction, duplication, distribution (including by way of email, facsimile or other electronic means), publication,
modification, copying or transmission of this Service Manual is STRICT Y PROHIBITED unless you have obtained the prior
written consent of the LG Electronics entity from which you received this Service Manual. The material covered by this prohi-
bition includes, without limitation, any text, graphics or logos in this Service Manual.
Copyright © 2019 LG Electronics Inc. All rights reserved. Only training and service purposes.
MODEL : LMXS28596*
CONFIDENTIAL
COLOR : BLACK STAINLESS(D)
STAINLESS(S)

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Summary of Contents for LG LMXS28596 Series

  • Page 1 Service Manual is STRICT Y PROHIBITED unless you have obtained the prior written consent of the LG Electronics entity from which you received this Service Manual. The material covered by this prohi- bition includes, without limitation, any text, graphics or logos in this Service Manual.

  • Page 2: Table Of Contents

    4. Use exact replacement parts. 5. Remove any objects from the top prior to tilting the product. Copyright © 2016 - 2018 LG Electronics Inc. All rights reserved. Only training and service purposes. Copyright © 2019 LG Electronics Inc. All...

  • Page 3: Specifications

    (759 mm) 48 1/2 (1232 mm) 36 1/4 (921 mm) &RS\ULJKW ı˝ flfi™ /* (OHFWURQLFV ,QF $OO ULJKWV Copyright © 2019 LG Electronics Inc. All UHVHUYHG 2QO\ WUDLQLQJ DQG VHUYLFH SXUSRVHV - 3 - rights reserved. Only training and service purposes...

  • Page 4: Parts Identification

    PARTS IDENTIFICATION Refrigerator Interior LED interior lamps Door-in-Door Case In-door Icemaker (Refrigerator) Crisper Glide‘N’Serve Fixed Door Bin Auto-Closing Hinge (On Some Models) Removable Ice Storage Bin Durabase and Durabase Divider ® ®...

  • Page 5: Disassembly

    3. DISASSEMBLY 3. DISASSEMBLY  Removing Refrigerator Door CAUTION : %HIRUH \RX EHJLQ XQSOXJ WKH UHIULJHUDWRU 5HPRYH IRRG DQG ELQV IURP GRRUV Left Door -FIG. 2  'LVFRQQHFW ZDWHU VXSSO\ WXEH E\ SXVKLQJ EDFN RQ WKH GLVFRQQHFW ULQJ  ),*  š...

  • Page 6: Door

    3-2 DOOR Door Gasket Replacement 1. Insert gasket into channel Mullion Removal 3UHVV JDVNHW LQWR FKDQQHOV RQ WKH IRXU UHPDLQLQJ 1. Remove 2 screws. VLGHV RI GRRU Figure 5 Figure 1 2. Lift Mullion up carefully. Mullion Replacement 1. Connect wire harness. Figure 2 3.

  • Page 8: Door Alignment

    ˜ ,FH )DQ 6FUROO $VVHPEO\ 5HSODFHPHQW 3-4 Door Alignment ,I WKH VSDFH EHWZHHQ WKH GRRU DUH XQHYHQ  5HPRYH WKH SODVWLF JXLGH RQ WKH OHIW VLGH XVLQJ D IROORZ WKH LQVWUXFWLRQV WR DOLJQ WKHP SKLOOLSV VFUHZGULYHU WR UHPRYH WKH VFUHZV 5HPRYH WKH %DVH *ULOOLH 7XUQ WKH OHYHOLQJ OHJV FRXQWHU †...
  • Page 9 3-7-2 Cap Decor LED LAMP(Bottom) ˜° 8QSOXJ UHIULJHUDWRU SRZHU FRUG IURP HOHFWULF RXWOHW  2SHQ WKH UHIULJHUDWRU GRRU WR QHHG GLDVVHPEO\  3XW IODW VFUHZGULYHU LQWR VHUYLFH KROH UHPRYH WKH FRYHU RI FDS GHFRU /(' /$03  5HPRYH WKH /(' DVVHPEO\ IURP FRQQHFWRU ’°...

  • Page 10: Main Pwb

    3-9 DISPLAY PCB 3-8 MAIN PWB ˜° /RRVHQ  VFUHZV RQ WKH 3:% FRYHU Figure 20  5HPRYH WKH 3:% FRYHU Figure 21  'LVFRQQHFW ZLUH KDUQHVV DQG UHSODFH WKH PDLQ 3:% LQ WKH UHYHUVH RUGHU RI UHPRYDO Figure 22 - 1 0 - -10- &RS\ULJKW †˘...

  • Page 11: Ice Corner Door Replacement

     'LVFRQQHFW ZLUH KDUQHVV IURP ZDOO RI FRPSDUWPHQW 3-10 ICE CORNER DOOR REPLACEMENT ˜° /RRVHQ WKH IURQW VFUHZ DV VKRZQ LQ WKH SLFWXUH  /LIW XS WKH KLQJH ZLWK RQH KDQG  3XOO RXW WKH ,FH &RUQHU 'RRU ZLWK WKH RWKHU KDQG KLQJH Figure 35 Figure 32...

  • Page 12: Cap Duct Motor Replacement

     ,QVHUW  VFUHZV CAUTION: 0DNH VXUH WKDW WKH PRWRU KRXVLQJ LV WDSHG WR WKH PROG LI QRW SRVLWLRQHG FRUUHFWO\ WKH FRYHU ZLOO QRW ILW SURSHUO\ Figure 42 ‡° 3XVK KRXVLQJ DVLGH Figure 36 3-12 CAP DUCT MOTOR REPLACEMENT Figure 43 ˜°...

  • Page 13: How To Remove A Ice Bin

    3-17 HOW TO REMOVE A ICE BIN 3-18 HOW TO INSERT A ICE BIN ˜° *ULS WKH KDQGOHV DV VKRZQ ˜° ,QVHUW WKH ,FH %LQ VOLJKWO\ WLOWLQJ WR DYRLG WRXFKLQJ WKH ,FHPDNHU (VSHFLDOO\ ,FH'HWHFWLQJ 6HQVRU Figure 44 Figure 47  7LOW DQG OLIW VOLJKWO\ DV VKRZQ Figure 45 š°...

  • Page 14: How To Remove And Reinstall The Pullout Drawer

    3-19 HOW TO REMOVE AND REINSTALL THE PULLOUT DRAWER 3-19-1 Follow Steps to Remove ˜°˛˝˙ˆˇ 2SHQ WKH IUHH]HU GRRU 6WHS  5HPRYH WKH ORZHU EDVNHW 6WHS  5HPRYH WKH WZR VFUHZV IURP WKH JXLGH UDLOV RQH ˜°˛˝˙†ˇ 5HPRYDO RI WKH IUHH]HU GRRU LV GRQH E\ OLIWLQJ FOHDU IURP HDFK VLGH  RI WKH UDLO VXSSRUW )XOO\ H[WHQG ERWK UDLOV...
  • Page 15 3-19-2 Follow Steps to Reinstall ˜°˛˝˙ˆˇ ,QVHUW ERWK VLGH RI VXSSRUWHU FRYHU WY LQWR ˜°˛˝˙—ˇ $VVHPEOH D EDU DQG JHDU LFH ZLWK VFUHZ 3XVK WKH RWKHUVLGH RI WKH JHDU WR LQVLGH RI WKH FRQQHFWRU UDLOV DQG WKHQ VFUHZ WKHP EDU 6WHS  3XW JHDU LFH DVVHPEOHG ZLWK WKH EDU E\ VFUHZ LQWR 6WHS  ,QVHUW RSSRVLWH JHDU LFH LQWR FRQQHFWRU UDLO DQG FRQQHFWRU UDLO¶V KROH...
  • Page 16 3-22 3-21 WATER VALVE DISASSEMBLY METHOD ˜° 7XUQ RII WKH ZDWHU WR XQLW 5HPRYH WKH ZDWHUOLQH IURP WKH YDOYH Figure 60  5HPRYH FRYHU DQG  VFUHZ IURP WKH YDOYH 0HFKDQLFDO &RYHU Figure 61  6HSDUDWH WKH KRXVLQJ DQG UHPRYH WKH YDOYH +RXVLQJ Figure 62  5HPRYH WKH FOLS DQG SUHVV WKH FROOHW WR VHSDUDWH WKH...

  • Page 17: Drawer Removal

    3-23 Drawer Removal )XOO\ H[WHQG WKH GUDZHU DQG OLIW IURP WKH IURQW SXOOLQJ VWUDLJKW RXW Figure 66 7R LQVWDOO WKH GUDZHU EDFN LQWR WKH IUDPH WLOW WKH IURQW VLJKWO\ DQG SXVKLQJW EDFN LQWR SODFH Figure 67 -17- - 17 - &RS\ULJKW ‹...
  • Page 18 Chapter 13 How to disassemble and assemble the vegetable box 1. Cover TV service method (GC-J288***) How to disassemble and assemble the vegetable box How to disassemble vegetable box -18-...

  • Page 19: Adjustment

    4. ADJUSTMENT 4. ADJUSTMENT 4-1 COMPRESSOR 4-2-3 Compressor protection logic 6LQFH OLQHDU &RPS FRQGXFWV OLQHDU UHFLSURFDWLQJ PRWLRQ 4-1-1 Role ZH KDYH SURWHFWLRQ ORJLF IRU FRPSUHVVRU PRWRU DQG 3&% 7KH FRPSUHVVRU LQWDNHV ORZ WHPSHUDWXUH DQG ORZ SUHVVXUH DV WKH EHORZ JDV IURP WKH HYDSRUDWRU RI WKH UHIULJHUDWRU DQG FRPSUHVVHV WKLV JDV WR KLJKWHPSHUDWXUH DQG KLJKSUHVVXUH JDV ,W WKHQ  6WURNH 7ULS GHOLYHUV WKH JDV WR WKH FRQGHQVHU...

  • Page 20: Circuit Diagram

    5. CIRCUIT DIAGRAM MEZ66414033 (Label,Circuit) -20- Copyright © 2016 - 2018 LG Electronics Inc. All rights reserved. Only training and service purposes...

  • Page 21: Troubleshooting

    6. TROUBLESHOOTING 6. TROUBLESHOOTING 6-1 Error Code Summary WARNING: :KHQ FKHFNLQJ 5HVLVWDQFH YDOXHV PDNH VXUH WR WXUQ RII WKH SRZHU DQG ZDLW IRU WKH YROWDJH WR GLVFKDUJH NOTE) :LWKLQ  KRXUV DIWHU WKH HUURU  3UHVV WKH ,FH 3OXV EXWWRQ DQG )UHH]HU EXWWRQ VLPXOWDQHRXVO\  KRXUV DIWHU WKH HUURU  $OO HUURUV H[FHSW IRU ³UW (´ ³+6 (´ ³,6 (´...

  • Page 22: Pcb Picture

    7. PCB Picture 7. PCB PICTURE 7-1. Main PCB ( P/N : EBR860937 **) 7-2. Display PCB ( P/N : EBR841464**) CON103 CON102 CON101 CON802 &RS\ULJKW ‹  /* (OHFWURQLFV ,QF $OO ULJKWV - 22 - UHVHUYHG 2QO\ WUDLQLQJ DQG VHUYLFH SXUSRVHV -22-...
  • Page 23 7. PCB Picture 7-3. Sub PCB ( P/N : EBR764684**) ( P/N : EBR764684**) &RS\ULJKW ‹  /* (OHFWURQLFV ,QF $OO ULJKWV UHVHUYHG 2QO\ WUDLQLQJ DQG VHUYLFH SXUSRVHV -23-...
  • Page 24 8. Trouble Shooting 8. Trouble Shooting 8-1. Freezer Sensor Error (FS E) Symptom Check Point 1. FS E 1. Check for a loose connection 2. Check Sensor Resistance Resistance [ Short CON5 Open pin ~ 11 Other Normal CON5 Resistance [ pin ~ 11 -22ºF / -30ºC -13ºF / -25ºC...
  • Page 25 Freezer Sensor Error (FS E) Reconnect or Is the Connector disconnected Check the Sensor resistance. repair the or loose between Main PCB and Is resistance normal? connector sensor? Check the Temperature and resistance refer to the table. No problem? CON5 CON5 Resistance [ pin ~ 11...
  • Page 26 8-2. Refrigerator Sensor Error (rS E) Symptom Check Point 1. rS E 1. Check for a loose connection 2. Check Sensor Resistance Resistance [ Short CON5 Open pin ~ 17 Other Normal CON5 Resistance [ pin ~ 17 23ºF / -5ºC 32ºF / 0ºC 41ºF / 5ºC 50ºF / 10ºC...
  • Page 27 Refrigerator Sensor Error (rS E) Reconnect or Is the Connector disconnected Check the Sensor resistance. repair the or loose between Main PCB and Is resistance normal? connector sensor? Check the Temperature and resistance refer to the table. No problem? CON5 CON5 Resistance [ pin ~ 17...
  • Page 28 8-3. Icing Sensor Error (IS E) Symptom Check Point 1. IS E 1. Check for a loose connection 2. Check Sensor Resistance Resistance [ Short CON101 pin ~ 2 Open Other Normal CON101 Resistance [ pin ~ 2 -22ºF / -30ºC -13ºF / -25ºC -4ºF / -20ºC -13ºF / -25ºC...
  • Page 29 Icing Sensor Error (IS E) Reconnect or Is the Connector disconnected Check the Sensor resistance. repair the or loose between Main PCB and Is resistance normal? connector sensor? Check the Temperature and resistance refer to the table. No problem? CON101 Resistance [ pin ~ 2 -22ºF / -30ºC...
  • Page 30 8-4. Defrost Sensor Error (dS F) Symptom Check Point 1. dS F 1. Check for a loose connection 2. Check Sensor Resistance Resistance [ Short CON5 Open pin ~ 9 Other Normal CON5 Resistance [ pin ~ 9 23ºF / -5ºC 32ºF / 0ºC 41ºF / 5ºC 50ºF / 10ºC...
  • Page 31 Defrost Sensor Error (dS F) 4 Check the Temperature and Change resistance refer to the table. Main No problem? Reconnect or Is the Connector disconnected repair the or loose between Main PCB, connector Defrost controller and Sensor? CON5 Resistance [ pin ~ 9 23ºF / -5ºC 32ºF / 0ºC...
  • Page 32 8-5. Ice Maker Motor Error (It E) Symptom Check Point 1. It E 1. Check the Ice maker rotation 2. Check the motor voltage - 32 - &RS\ULJKW ‹  /* (OHFWURQLFV ,QF $OO ULJKWV UHVHUYHG 2QO\ WUDLQLQJ DQG VHUYLFH SXUSRVHV -32-...
  • Page 33 Ice Maker Motor Error (It E) Change the Explain to Main PCB Input Ice Maker test mode(Push customer Check the ice maker forward status The ice maker test button),check The voltage (1)~(2) point 0V? The Ice Tray,Ice maker motor Rotate? Change the Check the ice maker reverse status Main PCB...
  • Page 34 8-6. Defrost Heater Error (dH F) Symptom Check Point 1. dH F 1. Check the door gasket 2. Check the Defrost control part 3. Check the PCB output voltage Part Resistance [ FUSE-M Defrost Heater 34~42 Defrost Sensor TEST MODE 3 Voltage [V] CON7 112V ~ 116V...
  • Page 35 Defrost Heater Error (dH F) Input Test 3 Mode (Push the button 3 times) Replace the Replace Check the Door gasket . Check the Heater Voltage. Door gasket Main PCB Is door gasket damaged? Is voltage 112V ~ 116V? Change TEST MODE 3 Voltage [V] Defrost...
  • Page 36 8-7. Freezer Fan Error (FF E) Symptom Check Point 1. FF E 1. Check the air flow 2. Check the Fan Motor 3. Check the PCB Fan motor voltage TEST MODE 1 Voltage [V] CON7 pin ~ 5 CON7 0V<Voltage<5V pin ~ 5 CON7 0V<Voltage<5V...
  • Page 37 Freezer Fan Error (FF E) Reset the unit and Check the Fan Motor voltage Input Test1 Mode. Replace Is Fan Motor voltage 12V? (Push the button 1 time) Main PCB CON3 TEST MODE 1 Voltage [V] CON7 Go to 3 pin ~ 5 Open the freezer door and Check the air flow.
  • Page 38 8-8. Icing Fan Error (IF E) Symptom Check Point 1. IF E 1. Check the air flow 2. Check the Connector 3. Check the PCB Fan motor voltage Voltage [V] TEST MODE 1 CON3 pin ~ 9 CON3 0V<Voltage<5V pin ~ 9 CON3 0V<Voltage<5V pin ~ 9...
  • Page 39 Freezer Fan Error (IF E) Reset the unit and Check the Fan Motor voltage Input Test1 Mode. Replace Is Fan Motor voltage 12V? (Push the button 1 time) Main PCB CON3 TEST MODE 1 Voltage [V] CON3 Go to 3 pin ~ 9 Open the freezer door and Check the air flow.
  • Page 40 8-9. Condenser Fan Error (CF E) Symptom Check Point 1. CF E 1. Check the air flow 2. Check the Connector 3. Check the PCB Fan motor voltage Fan Motor Voltage [V] TEST MODE 1 CON3 pin ~ 1 CON3 0V<Voltage<5V pin ~ 1 CON3...
  • Page 41 Condenser Fan Error (CF E) Reset the unit and Check the Fan Motor voltage Input Test1 Mode. Replace Is Fan Motor voltage 12V? (Push the button 1 time) Main PCB TEST MODE 1 Voltage [V] CON3 Go to 3 pin ~ 1 Check the fan rotating.
  • Page 42 8-10. Communication Error (CO E) Symptom Check Point 1. CO E 1. Check the loose connection 2. Check the Hinge connection Display CON101 CON101 Voltage [V] CON101 pin ~ 6 CON101 Not 0V, 5V pin ~ 6 CON101 Not 0V, 5V pin ~ 6 CON5 pin ~ 6...
  • Page 43 Communication Error (CO E) Change the Main PCB Check the voltage. Is CON101 4 pin ~ 6 voltage 0V or 5V? Check the loose connection Voltage Housing CON101 Check the pin ~ 6 0V, 5V Check the voltage. Hinge (loose connection) Are CON101 7 pin ~ 6...
  • Page 44 8-11. 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 - 44 - &RS\ULJKW ‹  /* (OHFWURQLFV ,QF $OO ULJKWV UHVHUYHG 2QO\ WUDLQLQJ DQG VHUYLFH SXUSRVHV -44-...
  • Page 45 8-11. Cube mode doesn’t work Resistance [ Voltage [V] CON1 CON1 24V 10% pin, 19 pin, 6 2.55 7% pin, 21 pin, 21 Pushing Voltage [V] The LEVER S/W CON1 pin, 6 5V 10% pin, 6 - 45 - &RS\ULJKW ‹  /* (OHFWURQLFV ,QF $OO ULJKWV UHVHUYHG 2QO\ WUDLQLQJ DQG VHUYLFH SXUSRVHV -45-...
  • Page 46 Cube mode doesn't work Change the Cover Check the Display PCB Voltage Assembly, Value Check the Check the Auger Motor Display Ice Bucket (Working Sound (Loc. 279A) Con 102 Visual inspection) Check the SUB PCB Resistance Value Change the Dispenser Assembly,Ice CON102 (Loc.
  • Page 47 8-12. 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 &RS\ULJKW ‹  /* (OHFWURQLFV ,QF $OO ULJKWV - 47 - UHVHUYHG 2QO\ WUDLQLQJ DQG VHUYLFH SXUSRVHV -47-...
  • Page 48 8-12. Crush mode doesn’t work Resistance [ Voltage [V] CON1 CON1 24V 10% pin, 19 pin, 6 2.55 7% pin, 21 pin, 21 Pushing Voltage [V] The LEVER S/W CON1 pin, 6 5V 10% pin, 6 - 48 - &RS\ULJKW ‹  /* (OHFWURQLFV ,QF $OO ULJKWV UHVHUYHG 2QO\ WUDLQLQJ DQG VHUYLFH SXUSRVHV -48-...
  • Page 49 Crush mode doesn't work Change the Cover Check the Display PCB Voltage Assembly, Value Check the Check the Auger Motor Display Ice Bucket (Working Sound (Loc. 279A) Con 102 Visual inspection) Check the SUB PCB Resistance Value Change the Dispenser Assembly,Ice CON102 (Loc.
  • Page 50 8-13. 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 LEVER S/W Voltage [V] Pushing 112~115V 0~2V Pushing Resistance [ Pilot Valve 360~420 Water valve 360~420 &RS\ULJKW ‹...
  • Page 51 Water mode doesn't work Replace Check the loose connection Water Valve Check the resistance value. Is Water Valve resistance 360~420 ? Change the Check the voltage. (while pushing the lever S/W) Is voltage correct? Water Valve Resistance [ Water valve 360~420 Voltage [V] LEVER S/W...
  • Page 52 8-14. Refrigerator room lamp doesn’t work Symptom Check Point 1. Refrigerator room 1. Check the Refrigerator door switch sticky lamp doesn’t work 2. Check the door S/W resistance 3. Check the LED Lamp Door S/W S/W Resistance [ Open Infinity Door Close Voltage [V]...
  • Page 53 Refrigerator room lamp doesn’t work Change the Check the LED Lamp voltage. Change the Check the Refrigerator door switch. Door S/W Is it 0~2V? (While door closed) Door S/W Does it feel sticky? Change the Check the door S/W resistance. Door S/W 5 Check the LED Lamp voltage.
  • Page 54 8-15. Freezer room upper lamp doesn’t work Symptom Check Point 1. Freezer room upper 1. Check the Freezer door switch sticky lamp doesn’t work 2. Check the door S/W resistance 3. Check the LED Lamp F U LED PCB Door S/W S/W Resistance [ Open Infinity...
  • Page 55 Freezer room upper lamp doesn’t work Change the Change the Check the Freezer door switch. Door S/W LED Lamp Check the LED Lamp voltage Does it feel sticky? Is voltage 12V? (While door open) Change the Check the door S/W resistance. Door S/W Is it correct compared with table? Explain to customer...
  • Page 56 8-16. Poor cooling in Fresh food section Symptom Check Point 1. Poor cooling in Fresh 1. Check the sensor resistance food section 2. Check the air flow 3. Check the air Temperature 4. Check the R-Damper motor voltage Duct Fan Motor Resistance [ 23ºF / -5ºC 32ºF / 0ºC...
  • Page 57 Poor cooling in Fresh food section Check the air temperature. Check the Is it cold? Compressor and sealed system Check the sensor resistance. Go to 7 Check the Fan Motor voltage Replace Is Fan Motor voltage right? Main PCB Resistance [ 23ºF / -5ºC 32ºF / 0ºC 41ºF / 5ºC...
  • Page 58 8-17. Poor cooling in Freezer compartment Symptom Check Point 1. Poor cooling in 1. Check the sensor resistance Freezer compartment 2. Check the air flow 3. Check the air Temperature 4.Check the Fan motor sticky 5. Check the Fan motor voltage Duct Fan Motor Resistance [...
  • Page 59 Poor cooling in Freezer compartment Check the Compressor Check the air temperature. and sealed Is it cold? Check the sensor resistance. system Change the CON7 Resistance [ Fan motor Check the Fan motor. pin ~ 20 Rotate fan using hand. -22ºF / -30ºC It feel sticky? -13ºF / -25ºC...
  • Page 60 Replace Check the Fan Motor voltage Main PCB Is Fan Motor voltage right ? Voltage [V] TEST MODE 1 0V<Voltage<5V 7 Check the Fan Motor voltage Change the Is Fan Feed Back voltage right? motor TEST MODE 1 Voltage [V] 0V<Voltage<5V Explain to customer &RS\ULJKW ‹...
  • Page 61 8-17. Over cooling in Freezer compartment Symptom Check Point 1. Over cooling in 1. Check the sensor resistance Freezer compartment 2. Check the air flow 3. Check the air Temperature 4.Check the Fan motor sticky 5. Check the Fan motor voltage Duct Fan Motor CON5 12...
  • Page 62 Over cooling in Freezer compartment Change the Fan motor Check the Fan motor. Rotate fan using hand. Check the sensor resistance. It feel sticky? Fan Motor Resistance [ -22ºF / -30ºC -13ºF / -25ºC -4ºF / -20ºC Change the Main PCB -13ºF / -25ºC 14ºF / -10ºC 23ºF / -5ºC...
  • Page 63 8-18. Home Bar Heater do not work Symptom Check Point 1. Home Bar do not work 1. Check the Main PCB 2. Check the Home Bar Heater Part Resistance [ Defrost Heater 1912~2314 TEST MODE 3 Voltage [V] 112V ~ 116V TEST MODE 1 Voltage [V] &RS\ULJKW ‹...
  • Page 64 Home Bar Heater do not work Input Test 3 Mode (Push the button 3 times) Replace the Replace Check the Door gasket . Check the Heater Voltage. Door gasket Main PCB Is door gasket damaged? Is voltage 112~116V? Connect the TEST MODE 3 Voltage [V] housing...
  • Page 65 8-19. GID Heater do not work Symptom Check Point 1. GID HTR do not work 1. Check the Main PCB 2. Check the Home Bar Heater Part Resistance [ Defrost Heater 1912~2314 TEST MODE 3 Voltage [V] 112V ~ 116V TEST MODE 1 Voltage [V] - 65 -...
  • Page 66 GID Heater do not work Input Test 3 Mode (Push the button 3 times) Replace the Replace Check the Door gasket . Check the Heater Voltage. Door gasket Main PCB Is door gasket damaged? Is voltage 112~116V? Connect the TEST MODE 3 Voltage [V] housing Is the connector loose?
  • Page 67 8-20. Hygiene fan doesn’t work Symptom Check Point 1. Hygiene fan doesn’t 1. Check Hygiene Fan motor voltage work 2. Main PCB Hygiene Fan motor Voltage [V] - 67 - &RS\ULJKW ‹  /* (OHFWURQLFV ,QF $OO ULJKWV UHVHUYHG 2QO\ WUDLQLQJ DQG VHUYLFH SXUSRVHV -67-...
  • Page 68 Hygiene fan doesn’t work Change the Change the Fan motor Check the Hygiene voltage Choose the Hygiene Max in display Is voltage 12V? (While door open) Check the PCB Voltage. Is CON6 2 pin ~ 5 voltage 12V? Voltage [V] Explain to customer Connect the Is the connector loose?
  • Page 69 8-20. Wi-Fi modem doesn’t work Symptom Check Point 1. Wi-Fi modem 1. Check connector doesn’t work 2. Display PCB 3. Wi-Fi modem PCB Display PCB Wi-Fi PCB CON802 CON802 Wi-Fi ON Voltage [V] CON802 pin ~ 4 CON802 pin ~ 4 0V, 5V CON802 pin ~ 4...
  • Page 70 Wi-Fi modem doesn’t work Check the Display PCB output? Connect the Change the ( While Wi-Fi function is on ) housing display Choose the connectors in the display and lead wire. Is it loose ? Display Voltage CON802 pin ~ 4 pin ~ 4 0V, 5V CON802...

  • Page 71: Reference

    10. REFERENCE 10. REFERENCE 10-1 TEST MODE and Removing TPA 1. How to enter the TEST MODE Push the test button on the Main PCB to enter the TEST MODE. * 1 time : Comp / Damper / All FAN on (Everything is displayed) * 2 times : Damper closed (22 22 displayed)
  • Page 72 10-2 TEMPERATRUE CHART - FRZ AND ICING SENSOR TEMP RESISTANCE VOLTAGE ƒ) ƒ&  9  ƒ) ƒ&  9  ƒ) ƒ&  9  ƒ) ƒ&  9  ƒ) ƒ&  9  ƒ) ƒ&  9  ƒ) ƒ& ...
  • Page 73 10-3 TEMPERATRUE CHART - REF AND DEF SENSOR TEMP RESISTANCE VOLTAGE ƒ) ƒ&  9  ƒ) ƒ&  9  ƒ) ƒ&  9  ƒ) ƒ&  9  ƒ) ƒ&  9  ƒ) ƒ&  9  ƒ) ƒ& ...
  • Page 74 10-4 How to check the Fan-Error ˜°˛ (%5 $IWHU VHQGLQJ D VLJQDO WR WKH IDQ WKH 0,&20 FKHFNV WKH %/'& IDQ PRWRU V ORFN VWDWXV ,I WKHUH LV QR IHHGEDFN VLJQDO IURP WKH %/'& IDQ WKH IDQ PRWRU VWRSV IRU  VHFRQGV DQG WKHQ LV SRZHUHG DJDLQ IRU  VHFRQGV 7R GHWHUPLQH WKDW WKHUH LV D IDQ PRWRU PDOIXQFWLRQ WKLV SURFHVV LV UHSHDWHG  WLPHV ,I WKH IDQ PRWRU LV GHWHUPLQHG WR EH GHIHFWLYH WKH HUURU FRGH ZLOO EH VKRZQ LQ WKH GLVSOD\ IRU  PLQXWHV...

  • Page 75: Component Testing Information

    11. COMPONENT TESTING INFORMATION 11. COMPONENT TESTING INFORMATION 11-1 Defrost Controller Assembly Function 7KH FRQWUROOHU DVVHPEO\ LV PDGH XS RI WZR GLIIHUHQW NLQGV RI SDUWV 7KH IXVH DQG WKH VHQVRU 7R GHWHUPLQH LI WKHVH SDUWV DUH GHIHFWLYH FKHFN IRU UHVLVWDQFH 7KH IXVH ZLOO FXW SRZHU WR WKH GHIURVW KHDWHU DW YHU\ KLJK WHPSHUDWXUHV 6HW D RKPPHWHU WR WKH  KRXVLQJ SLQ How to...
  • Page 76 11-2 Sheath Heater 6KHDWK KHDWHU LV D SDUW IRU GHIURVW $OO KHDWLQJ ZLUH LV FRQQHFWHG WR RQO\ RQH OLQH 7R FKHFN LI Function WKH SDUW LV GHIHFWLYH FKHFN WKH UHVLVWDQFH How to Measure (1) (2) 6HW D RKPPHWHU FRQQHFW WR 7KH  KRXVLQJ SLQ 0HDVXUH WKH  SLQ FRQQHFWHG WR 6KHDWK +HDWHU ,I WKH RKPPHWHU LQGLFDWH 9ƒ¡9 :DWW 5 LV JRRG FRQGLWLRQ H[ ZKHQ ZDWW Z YROWDJH Y 5 ƒ¡  ...
  • Page 77 11-3 Door Heater Assembly ˜°˛˝˙°˙ˆˇ -77- - 77 - &RS\ULJKW ‹  /* (OHFWURQLFV ,QF $OO ULJKWV UHVHUYHG 2QO\ WUDLQLQJ DQG VHUYLFH SXUSRVHV...
  • Page 78 11-5 Dispenser DC Motor Function ˜ 'LVSHQVHU '& 0RWRU  :KHQ FXVWRPHU SXVK WKH GLVSHQVHU EXWWRQ 3XOO GXFW GRRU DQG DEVWUDFW IURP LFH EDQN How to Measure Dispensor DC Motor Standard Dispenser DC Motor 7HVW 3RLQWV 5HVXOW  WR   a  -78- - 78 -...
  • Page 79 11-7 Damper 7KH GDPSHU VXSSOLHV FROG DLU IURP WKH IUHH]HU WR WKH FKLOO URRP XVLQJ WKH GDPSHU SODWH 7KH Function FKLOO URRP LV FROGHU ZKHQ WKH GDPSHU SODWH LV RSHQ :KHQ WKH GDPSHU LV FORVHG WKH FKLOO URRPV WHPSHUDWXUH ZLOO ULVH How to Measure <...
  • Page 80 11-9 Flow Sensor Function )ORZ 6HQVRU LQ PDFKLQH URRP &RXQW WKH ZDWHU TXDQWLW\ IURP FLW\ ZDWHU WR ZDWHU ILOWHU LQ UHIULJHUDWRU How to Measure )ORZ 6HQVRU LQ PDFKLQH URRP Standard 7HVW 3RLQWV 5HVXOW 5HG ZLUH WR %ODFN ZLUH  a  -80- - 80 - &RS\ULJKW ’˙...
  • Page 81 When the COMP & FAN are not operating simultaneously, force operate from the Main PCB in TEST MODE to check whether it is operating and then check the power of the COMP end to reset the power. Copyright © 2018 LG Electronics Inc. All rights - 81 -...
  • Page 82 Replace PCB Check Check Comp. Action? > 60V Cycle leakage Copyright © 2018 LG Electronics Inc. All rights Check Check the Comp. reserved. Only training and service purposes. Cycle leakage * Transmits LED blinking number to PDA after completing action...
  • Page 83 → Restart every 30 seconds after compressor off. Test Mode LED 1 Blinks LED 1 Blinks Replace PCB Reset About 5min 1 Input Copyright © 2018 LG Electronics Inc. All rights - 83 - reserved. Only training and service purposes.
  • Page 84 LED 2 Reset Replace PCB About 5min 1 Input Wiring? > 60[V] ? COMP? Blinks Blinks Check Check Repair Cycle leakage COMP Harness Copyright © 2018 LG Electronics Inc. All rights - 84 - reserved. Only training and service purposes.
  • Page 85 Repair Harness (No Connect Trip) Do not operate Check Replace Check Comp. Comp.? Harness connection Compressor Replace PCB Recheck No Connect Trip Reset occur? Copyright © 2018 LG Electronics Inc. All rights - 85 - reserved. Only training and service purposes.
  • Page 86  Logic : After the Comp. Off every 90 seconds restart Comp. Test Mode LED 4 Blinks LED 4 Blinks About 5min Reset Replace PCB 1 Input - 86 - Copyright © 2018 LG Electronics Inc. All rights reserved. Only training and service purposes.
  • Page 87 Protection Logic Compressor (Locked Piston Trip) Do not operate Do not operate Clogging the Cycle? Reset Comp.? Comp.? Repair Sealed system Recheck Copyright © 2018 LG Electronics Inc. All rights - 87 - reserved. Only training and service purposes.
  • Page 88 Compressor Current trip Recheck Reset occur? Do not operate Replace Clogging the Cycle? Comp.? Compressor Check the Repair leakage and cycle Sealed system Copyright © 2018 LG Electronics Inc. All rights - 88 - reserved. Only training and service purposes.
  • Page 89  Cause : IPM Short and failure  Logic : After the Comp. Off every 20 seconds restart Comp. Reset Replace PCB Blinking 7 Blinking 7 times times - 89 - Copyright © 2018 LG Electronics Inc. All rights reserved. Only training and service purposes.
  • Page 90  Logic : Only LED blinking without the Comp. Off (Comp. is operate command before communication error) Reset Replace PCB Blinking 8 Blinking 8 times times - 90 - Copyright © 2018 LG Electronics Inc. All rights reserved. Only training and service purposes.
  • Page 91  To judge whether there is any issue with the PCB operation, check the PCB output voltage. Normal: Voltage 80[V] or higher output at COMMON - POWER - 91 - Copyright © 2018 LG Electronics Inc. All rights reserved. Only training and service purposes.
  • Page 92 (point A) Replace Harness Check the Resistance Check the Resistance Check (point B) (point D) Compressor Comp. terminal failure Connection error Connection error Copyright © 2018 LG Electronics Inc. All rights - 92 - reserved. Only training and service purposes.
  • Page 93 ※The resistance can differ by few Ω depending on CAPACITOR 단 the surrounding temperature or operating condition. short Multi Tester Earth Check the insulation break-down Multi Tester Hermetic terminal Copyright © 2018 LG Electronics Inc. All rights - 93 - reserved. Only training and service purposes.
  • Page 94 ‡ &KHFN LI IRRG SXW LQ WKH UHIULJHUDWRU LV KRW ‡ 3XW LQ IRRGV DIWHU WKH\ KDYH FRROHG GRZQ ‡ 'LG \RX RSHQ WKH GRRU RI WKH XQLW WRR RIWHQ RU ‡ 'RQ W RSHQ WKH GRRU WRR RIWHQ DQG FORVH LW FKHFN LI WKH GRRU LV VHDOHG SURSHUO\"...
  • Page 95 12-6 REFRIGERATION CYCLE Troubleshooting Chart TEMPERATURE STATE OF STATE OF THE OF THE CAUSE REMARKS THE UNIT EVAPORATOR COMPRESSOR ˜°˛˝˙°ˆ )UHH]HU /RZ IORZLQJ VRXQG RI $ OLWWOH KLJKHU WKDQ ‘ 5HIULJHUDQW OHYHO LV ORZ GXH /($.$*( FRPSDUWPHQW DQG 5HIULJHUDQW LV KHDUG DPELHQW WR D OHDN 5HIULJHUDWRU GRQ W...
  • Page 96 12-6-2 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 Frost Partial None Pattern? Equalization Equalization Test Test Very Fast Very Slow Very Slow Very Fast Fast...

  • Page 97: Icemaker Opearting And Trouble Shooting Method

    13. ICEMAKER OPEARTING AND TROUBLE SHOOTING METHOD 13. ICEMAKER OPERATING METHOD AND TROUBLE SHOOTING 13-1 Icemaker’s Basic Operating Method Power On Power On Start Position ˜ $GMXVWV ,FH 7UD\ WR 6WDUW 3RVLWLRQ ZLWK SRZHU RQ ˜ $GMXVWV ,FH 7UD\ WR 6WDUW 3RVLWLRQ ZLWK SRZHU RQ ˜...
  • Page 98 13-2 ICE MAKER FUNCTIONS 13-2-1 Icemaking Mode ˜° ,FHPDNLQJ 0RGH EHJLQV ULJKW DIWHU WKH LFH WUD\ ILOOV ZLWK ZDWHU  ,FHPDNHU ZDLWV XQWLO ZDWHU EHFRPHV LFH LQ WKH LFH WUD\ ,FHGHWHFWLQJ VHQVRU FKHFNV LI WKH LFH ELQ LV IXOO HYHU\ PLQ 13-2-2 Harvest Mode $W OHDVW LQ PLQ VLQFH LFHPDNHU EHJXQ LFHPDNLQJ PRGH ,FHPDNHU VWDUWV WR WZLVW WKH LFH WUD\ WR GURS LFHV LQWR WKH ,FH ELQ $IWHU LQVWDOODWLRQ DW OHDVW GD\ LV QHHGHG WR PDNH LFHV ...
  • Page 99 13-3-2 Icemaker not making ice or not making enough ice (Icemaker Unit & Ice-detecting sensor Diagnosis) Icemaker Unit and Ice-detecting sensor Diagnosis 7KH LFHPDNHU XQLW DQG ,FHGHWHFWLQJ VHQVRU LV SURJUDPPHG WR EH GLDJQRVHG )ROORZ WKH SURFHGXUH VWHS E\ VWHS WR FKHFN WR VHH LI LFHPDNHU DQG ,FHGHWHFWLQJ VHQVRU LV ZRUNLQJ QRUPDOO\ ,FHPDNHU 8QLW ,FHGHWHFWLQJ VHQVRU )LOO .H\...
  • Page 100 STEP (Ice-detecting sensor Diagnosis) 2. Close the left door 1. Remove Ice bin from compartment 3. Wait for 3min. (Door switch pushed) 4. Freezer door stays open 5. Push the refrigerator button & lock button at the same time. is shown on the display after the procedure above, Ice-detecting sensor is normal. FULL is shown on the display after the procedure above, Ice-detecting sensor is abnormal.

  • Page 101: Description Of Function & Circuit Of Micom

    14. DESCRIPTION OF FUNCTION & CIRCUIT OF MICOM 14. DESCRIPTION OF FUNCTION & CIRCUIT OF MICOM 14-1 FUNCTION 14-1-1 Function ˜° :KHQ WKH DSSOLDQFH LV SOXJJHG LQ LW LV VHW WR ƒ) IRU 5HIULJHUDWRU DQG ƒ) IRU IUHH]HU <RX FDQ DGMXVW WKH 5HIULJHUDWRU DQG WKH )UHH]HU FRQWURO WHPSHUDWXUH E\ SUHVVLQJ WKH $'-867 EXWWRQ •°...
  • Page 102 14-1-4 Filter condition display function 14-1-5 Ice Plus selection ˜° 3OHDVH VHOHFW LFH SOXV IXQFWLRQ IRU TXLFN IUHH]LQJ ° :KHQ \RX SUHVV WKH LFH SOXV EXWWRQ WKH LFH SOXV LFRQ ZLOO EH WXUQHG RQ DJDLQ  ,FH SOXV IXQFWLRQ DXWRPDWLFDOO\ WXUQV RII DIWHU D IL[HG WLPH SDVVHV “°...
  • Page 103 14-1-7. How to operate the Hygiene fresh filter 14-1-7. How to operate the Hygiene fresh filter ˜°˛˝˙ˆ˝ˇ˘ +\JLHQH )UHVK 32:(5 0RGH $IWHU  KRXUV 14-1-8. AUTO Mode 1. Fan installed on the multi.duct on the rear side of the filter operates. 2.
  • Page 104 14-1-10 CONTROL OF FREEZER FAN MOTOR ˜° )UHH]HU IDQ PRWRU KDV KLJK DQG VWDQGDUG VSHHGV  +LJK VSHHG LV XVHG DW SRZHUXS IRU 8OWUD ,FH DQG ZKHQ UHIULJHUDWRU LV RYHUORDGHG 6WDQGDUG VSHHGV LV XVHG IRU JHQHUDO SXUSRVHV “° 7R LPSURYH FRROLQJ VSHHG WKH 530 RI WKH IUHH]HU IDQ PRWRU FKDQJH IURP QRUPDO VSHHG WR KLJK •°...
  • Page 105 14-1-15 Defrosting (removing frost) ˜° 'HIURVWLQJ VWDUWV HDFK WLPH WKH &2035(6625 UXQQLQJ WLPH %HWZHH a KRXUV  )RU LQLWLDO SRZHU RQ RU IRU UHVWRULQJ SRZHU GHIURVWLQJ VWDUWV ZKHQ WKH FRPSUHVVRU UXQQLQJ WLPH UHDFKHV  KRXUV  'HIURVWLQJ VWRSV LI WKH VHQVRU WHPSHUDWXUH UHDFKHV ƒ) ƒ& RU PRUH ,I WKH VHQVRU GRHVQ¶W UHDFK ƒ) ƒ& LQ  KRXUV WKH GHIURVW PRGH LV PDOIXQFWLRQLQJ 5HIHU WR WKH GHIHFW GLDJQRVLV IXQFWLRQ  €°...
  • Page 106 323B 249C 105A 408A 309B 329C 332C 308B 420A 405H 312C 146G 404A 106A 405P 329A 319A 405F 405C 610E 407A 315B 315A 315C 315B 315C Copyright © 2019 LG Electronics Inc. All rights reserved. Only training and service purposes...
  • Page 107 131A 136B 251A 251B 203C 237C 136A Copyright © 2019 LG Electronics Inc. All rights reserved. Only training and service purposes...
  • Page 108 141A 140A 141C 142B 142D 142A 141B 141A 139A 141C 141B 141E 139B 161C 141D 151A 146B 151B 162B 146C 145D 162A Copyright © 2019 LG Electronics Inc. All rights reserved. Only training and service purposes...
  • Page 109 200A 249E 203A 250B 253A 250B 249F 249K 249J 407G HW76 212D 250A 249E 250B 201B 200B 250B 253A 249F 249K 203B 249J 407G HW76 212D Copyright © 2019 LG Electronics Inc. All rights reserved. Only training and service purposes...
  • Page 110 275A 612B 405A 612C 279J 402C 503A 104A 279H Copyright © 2019 LG Electronics Inc. All rights reserved. Only training and service purposes...
  • Page 111 617A 625A 616H 616H 623B 616J 623B 616J 627A 619A Copyright © 2019 LG Electronics Inc. All rights reserved. Only training and service purposes...
  • Page 112 630J 630J 612A 600C 630F 630B 630C 600A 611A 607A 630A 630H 601C 630D 630E 630Q 630G Copyright © 2019 LG Electronics Inc. All rights reserved. Only training and service purposes...
  • Page 113 P/No. MFL68744244 Feb., 2019 Printed in Korea Copyright © 2019 LG Electronics Inc. All rights reserved. Only training and service purposes.

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