LG LRMVS3006 Series Service Manual
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LG LRMVS3006 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 STRICTLY 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 © 2020 LG Electronics Inc. All rights reserved. Only training and service purposes.
MODEL : LRMVS3006*
CONFIDENTIAL
COLOR : BLACK STAINLESS(D)
STAINLESS(S)

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Summary of Contents for LG LRMVS3006 Series

  • Page 1 Service Manual is STRICTLY 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

    3. Take caution not to get water near any electrical components. 4. Use exact replacement parts. 5. Remove any objects from the top prior to tilting the product. Copyright © 2019 LG Electronics Inc. All rights reserved. Only training and service purposes.

  • Page 3: Specifications

    Depth (Total with Freezer Drawer 59 3/8" (1508 mm) 47 3/4" (1213 mm) Open) Depth (Total with Door Open 90°) 50 1/8" (1272 mm) 43 1/4" (1097 mm) Copyright © 2019 LG Electronics Inc. All rights reserved. Only training and service purposes.

  • Page 4: Parts Identification

    Pullout Drawer Provides extra storage within the freezer compartment. Automatic Icemaker (Freezer) Dispenses ice automatically. Durabase and Durabase Divider Provides storage for large frozen food items. Copyright © 2019 LG Electronics Inc. All rights reserved. Only training and service purposes.

  • Page 5: Disassembly

    1) Insert the tube until you can see only one of the lines printed on the tube. 2) After inserting, pull the tube to ascertain that it is secure. 3) Assemble clip. Correct Incorrect Copyright © 2019 LG Electronics Inc. All rights reserved. Only training and service purposes.

  • Page 6: Door

    Door Gasket Removal 1. Remove gasket 3. Assemble 2 screws. Remove the gasket from gasket channel at doorliner as shown in the illustration below. Gasket Channel Gasket Copyright © 2019 LG Electronics Inc. All rights reserved. Only training and service purposes.

  • Page 7: Sub,Pcb

    Connect wire harness. Copyright © 2019 LG Electronics Inc. All rights reserved. Only training and service purposes.

  • Page 8: Door Alignment

    2. Separate the connector with the Defrost Control assembly and replace the Defrost Control assembly after cutting the Tie Wrap. (Figure 2) DEFROST-CONTROL GRILLE ASSEMBLY ASSEMBLY Copyright © 2019 LG Electronics Inc. All rights reserved. Only training and service purposes.

  • Page 9: Refrigerator Light

    4. Remove the LED assembly from connector. 4. Remove the LED assembly from connector. 5. Replace LED assembly. 5. Replace LED assembly. 6. Assemble the cover. 6. Assemble the cover. Copyright © 2019 LG Electronics Inc. All rights reserved. Only training and service purposes.

  • Page 10: Freezer Light

    4. Remove the LED assembly from connector. 5. Replace LED assembly. 5. Replace LED assembly. 6. Assembly the cover in reverse order. 6. Assembly the cover in reverse order. -10- Copyright © 2019 LG Electronics Inc. All rights reserved. Only training and service purposes.

  • Page 11: Multi Duct

    3. Pull the display using a flat screwdriver. 3. Disconnect connector. Disconnect the lead wire on the bottom position 4. Replace the display. Grip both side of multi duct, pull it out. -11- Copyright © 2019 LG Electronics Inc. All rights reserved. Only training and service purposes.

  • Page 12: Ice Corner Door Replacement

    1) Remove 3 screws marked in the picture below. 2) Grasp the bottom of motor cover assembly and pull it out slowly to remove. 3) Disconnect wire harness from wall of compartment. -12- Copyright © 2019 LG Electronics Inc. All rights reserved. Only training and service purposes.

  • Page 13: Cap Duct Motor Replacement

    Replace the motor and check the position of the door duct and the link for proper fit. Duct Door Cap Duct Motor 5) Insert 3 screws. -13- Copyright © 2019 LG Electronics Inc. All rights reserved. Only training and service purposes.

  • Page 14: How To Remove And Reinstall Filter

    Filter head Turn 90 the water tank to disconnect from Filter Head 3) Rotate the connector and pull out 3) Rotate the connector and pull out → → -14- Copyright © 2019 LG Electronics Inc. All rights reserved. Only training and service purposes.

  • Page 15: Full Convert Drawer

    Hold both sides of the door and lift it to Pull the drawer open to full extension. Lower remove it from the rail system. the basket onto the rail system. -15- Copyright © 2019 LG Electronics Inc. All rights reserved. Only training and service purposes.

  • Page 16: How To Replace The Sensor From Full Convert Drawer

    3-17 HOW TO REPLACE THE SENSOR FROM FULL CONVERT DRAWER 1) Pull the drawer open to full extension 2) Pull out door. 3) Loosen a screw. 4) Disassembly Sensor from connector rail. -16- Copyright © 2019 LG Electronics Inc. All rights reserved. Only training and service purposes.

  • Page 17: Pull Out Drawer

    Pull the drawer open to full extension. Gently lift and pull out the ice bin. Lift the front of the drawer up, then pull it straight out. -17- Copyright © 2019 LG Electronics Inc. All rights reserved. Only training and service purposes.

  • Page 18: How To Remove And Reinstall The Freezer Drawer

    3-19 HOW TO REMOVE AND REINSTALL THE FREEZER DRAWER 3-19-1 Follow Steps to Remove -18- Copyright © 2019 LG Electronics Inc. All rights reserved. Only training and service purposes.
  • Page 19 3-19-2 Follow Steps to Reinstall -19- Copyright © 2019 LG Electronics Inc. All rights reserved. Only training and service purposes.

  • Page 20: Water Valve Disassembly Method

    Note: there maybe some water vary depending on the water pressure in the line. ( about 2 minutes.). -20- Copyright © 2019 LG Electronics Inc. All rights reserved. Only training and service purposes.

  • Page 21: Caution : Sealed System Repair

    (Refrigerator outlet) Note : To service sealed system, follow the directions in "3-22" and "3-23" above.Then service is the same as a single evaporator system. -21- Copyright © 2019 LG Electronics Inc. All rights reserved. Only training and service purposes.

  • Page 22: How To Remove And Reinstall The Homebar

    2. To replace the Door Baskets of homebar, slides it in above the desired support and push down until it snaps into place. NOTE : Some Door Baskets of homebar may vary in appearance and will only fit in one location. -22- Copyright © 2019 LG Electronics Inc. All rights reserved. Only training and service purposes.

  • Page 23: How To Remove And Reinstall The Homebar Door

    1. Loosen top hinge cover screw. 2. Disconnect door switch wire harness. 3. Remove three Screws on the Top 4. Pull Frame Door. up and out. of Frame Door. -23- Copyright © 2019 LG Electronics Inc. All rights reserved. Only training and service purposes.

  • Page 24: How To Remove And Reinstall The Door Foam Assembly, Refrigerator

    2. Remove Wire connectors. 3. Rotate the hinge lever clockwise. 4. Separate the home Bar. 5. Pull ThE DOOR FOAM ASSEMBLY, REFRIGERATOR up and out. -24- Copyright © 2019 LG Electronics Inc. All rights reserved. Only training and service purposes.

  • Page 25: How To Remove The Case Home Bar

    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). SVC hole 5. Separate the Cover. -25- Copyright © 2019 LG Electronics Inc. All rights reserved. Only training and service purposes.

  • Page 26: How To Remove The Case Assembly Lamp

    4. 1) Push the flat screwdriver in the rear of the LED lamp and take the lamp out from the hook. 2) Disassemble the combined housing with the flat screwdriver. 3) You should take LED lamps out and pull from the right. -26- Copyright © 2019 LG Electronics Inc. All rights reserved. Only training and service purposes.

  • Page 27: Adjustment

    (2) Remove two screws on comp base (3) Use a L-shaped flap tool to pry off the cover (4) Assembly in reverse order of disassembly -27- Copyright © 2019 LG Electronics Inc. All rights reserved. Only training and service purposes.

  • Page 28: Circuit Diagram

    5. CIRCUIT DIAGRAM Freezer Icemaker Housing -28- Copyright © 2019 LG Electronics Inc. All rights reserved. Only training and service purposes.

  • Page 29: Troubleshooting

    3 hours after the error : All errors. except for "rt E", "HS E", "IS E"(except for icing room sensor), "Od E", "IU E", "Id E", "gF E", "It E" error. are displayed. Convertible Sensor Short or Disconnection of Error Pantry sensor -29- Copyright © 2019 LG Electronics Inc. All rights reserved. Only training and service purposes.
  • Page 30 Operation circuit Within I/M Kit, Or check connection or resistance IceMaker Kit Upper HTR Or Lower HTR On **Diagnosis for Test S/W not the Icemaker is Open circuit working -30- Copyright © 2019 LG Electronics Inc. All rights reserved. Only training and service purposes.

  • Page 31: Pcb Picture

    7. PCB Picture 7-1. Main PCB P/N : EBR883097** 7-2. Display PCB ( P/N : EBR812441**) -31- Copyright © 2019 LG Electronics Inc. All rights reserved. Only training and service purposes.
  • Page 32 7-3. Sub PCB CON2 CON3 CON4 CON5 -32- Copyright © 2019 LG Electronics Inc. All rights reserved. Only training and service purposes.

  • Page 33: Troubleshooting With Error Display

    Resistance [Ω] 18th pin ~ 12th pin -22ºF / -30ºC -13ºF / -25ºC -4ºF / -20ºC 5ºF(-15ºC) 14ºF / -10ºC 23ºF / -5ºC 32ºF / 0ºC -33- Copyright © 2019 LG Electronics Inc. All rights reserved. Only training and service purposes.
  • Page 34 Replace the Is the sensor connection refrigerator normall? Go to 6 Check the Sensor resistance. Is resistance OFF (Sensor open)? Reconnect or repair the connector -34- Copyright © 2019 LG Electronics Inc. All rights reserved. Only training and service purposes.
  • Page 35 Normal CON4 Resistance [Ω] 16th pin ~ 15th pin 23ºF / -5ºC 32ºF / 0ºC 41ºF / 5ºC 50ºF / 10ºC 19.5k 59ºF / 15ºC -35- Copyright © 2019 LG Electronics Inc. All rights reserved. Only training and service purposes.
  • Page 36 Replace the Is the sensor connection normal? refrigerator Go to 6 Check the Sensor resistance. Is resistance OFF (Sensor open)? Reconnect or repair the connector -36- Copyright © 2019 LG Electronics Inc. All rights reserved. Only training and service purposes.
  • Page 37 Resistance [Ω] 18th pin ~ 17th pin -22ºF / -30ºC -13ºF / -25ºC -4ºF / -20ºC 5ºF(-15ºC) 14ºF / -10ºC 23ºF / -5ºC 32ºF / 0ºC -37- Copyright © 2019 LG Electronics Inc. All rights reserved. Only training and service purposes.
  • Page 38 Replace the Is the sensor connection normal? refrigerator Go to 6 Check the Sensor resistance. Is resistance OFF (Sensor open)? Reconnect or repair the connector -38- Copyright © 2019 LG Electronics Inc. All rights reserved. Only training and service purposes.
  • Page 39 Normal CON4 Resistance [Ω] 22nd pin ~ 21st pin 23ºF / -5ºC 32ºF / 0ºC 41ºF / 5ºC 50ºF / 10ºC 19.5k 59ºF / 15ºC -39- Copyright © 2019 LG Electronics Inc. All rights reserved. Only training and service purposes.
  • Page 40 41ºF / 5ºC 50ºF / 10ºC 19.5k 59ºF / 15ºC Replace the ref rigerator Check the Sensor resistance. Is resistance OFF (Sensor open)? Explain to customer -40- Copyright © 2019 LG Electronics Inc. All rights reserved. Only training and service purposes.
  • Page 41 Normal CON4 Resistance [Ω] 20th pin ~ 19th pin 23ºF / -5ºC 32ºF / 0ºC 41ºF / 5ºC 50ºF / 10ºC 19.5k 59ºF / 15ºC -41- Copyright © 2019 LG Electronics Inc. All rights reserved. Only training and service purposes.
  • Page 42 41ºF / 5ºC 50ºF / 10ºC 19.5k 59ºF / 15ºC Replace the ref rigerator Check the Sensor resistance. Is resistance OFF (Sensor open)? Explain to customer -42- Copyright © 2019 LG Electronics Inc. All rights reserved. Only training and service purposes.
  • Page 43 TEST MODE 3 Voltage [V] CON9 112V ~ 116V 5th pin ~ 13th pin TEST MODE 1 Voltage [V] CON9 5th pin ~ 13th pin -43- Copyright © 2019 LG Electronics Inc. All rights reserved. Only training and service purposes.
  • Page 44 CON4 Resistance [Ω] 22nd pin ~ 21st pin 23ºF / -5ºC 32ºF / 0ºC 41ºF / 5ºC 50ºF / 10ºC 19.5k 59ºF / 15ºC 22k↑ -44- Copyright © 2019 LG Electronics Inc. All rights reserved. Only training and service purposes.
  • Page 45 TEST MODE 3 Voltage [V] CON9 112V ~ 116V 7th pin ~ 13th pin TEST MODE 1 Voltage [V] CON9 7th pin ~ 13th pin -45- Copyright © 2019 LG Electronics Inc. All rights reserved. Only training and service purposes.
  • Page 46 Resistance [° ] 20th pin ~ 19th pin 23ºF / -5ºC 32ºF / 0ºC 41ºF / 5ºC 50ºF / 10ºC 19.5k 59ºF / 15ºC 22k° ˛ -46- Copyright © 2019 LG Electronics Inc. All rights reserved. Only training and service purposes.
  • Page 47 CON3 11.4~12.6V 28th pin ~ 25th pin CON3 Not 0V, 5V 26th pin ~ 25th pin CON3 Not 0V, 5V 27th pin ~ 25th pin -45- Copyright © 2019 LG Electronics Inc. All rights reserved. Only training and service purposes.
  • Page 48 Rotate f an using hand. It f eel sticky? TEST MODE 1 Voltage [V] CON3 Not 0V, 5V 27th pin ~ 25th pin Explain to customer -46- Copyright © 2019 LG Electronics Inc. All rights reserved. Only training and service purposes.
  • Page 49 CON3 11.4~12.6V 16th pin ~ 13th pin CON3 Not 0V, 5V 14th pin ~ 13th pin CON3 Not 0V, 5V 15th pin ~ 13th pin -47- Copyright © 2019 LG Electronics Inc. All rights reserved. Only training and service purposes.
  • Page 50 Rotate f an using hand. It f eel sticky? TEST MODE 1 Voltage [V] CON3 Fan Motor Not 0V, 5V 15th pin ~ 13th pin Explain to customer -48- Copyright © 2019 LG Electronics Inc. All rights reserved. Only training and service purposes.
  • Page 51 CON3 11.4~12.6V 24th pin ~ 21st pin CON3 Not 0V, 5V 22nd pin ~ 21st pin CON3 Not 0V, 5V 23rd pin ~ 21st pin -49- Copyright © 2019 LG Electronics Inc. All rights reserved. Only training and service purposes.
  • Page 52 Rotate f an using hand. It f eel sticky? TEST MODE 1 Voltage [V] Fan Motor CON3 Not 0V, 5V 23rd pin ~ 21st pin Explain to customer -50- Copyright © 2019 LG Electronics Inc. All rights reserved. Only training and service purposes.
  • Page 53 CON3 11.4~12.6V 12th pin ~ 9th pin CON3 Not 0V, 5V 10th pin ~ 9th pin CON3 Not 0V, 5V 11th pin ~ 9th pin -51- Copyright © 2019 LG Electronics Inc. All rights reserved. Only training and service purposes.
  • Page 54 Rotate f an using hand. It f eel sticky? TEST MODE 1 Voltage [V] Fan Motor CON3 Not 0V, 5V 11th pin ~ 9th pin Explain to customer -52- Copyright © 2019 LG Electronics Inc. All rights reserved. Only training and service purposes.
  • Page 55 8-12. Communication Error (E CO) Symptom Check Point 1. E CO 1. Check the loose connection 2. Check the Hinge connection -53- Copyright © 2019 LG Electronics Inc. All rights reserved. Only training and service purposes.
  • Page 56 Explain to customer Is CON101 CON101 2nd Pin ~ 4th Pin voltage 0V or 5V? Voltage CON101 CON101 2nd pin & 4th pin 0V, 5V -54- Copyright © 2019 LG Electronics Inc. All rights reserved. Only training and service purposes.
  • Page 57 Symptom Check Point 1. Cube mode 1. Check the loose connection doesn’t work 2. Check the resistance Ice Maker Geared Motor Dispenser Motor (BLDC Type) -55- Copyright © 2019 LG Electronics Inc. All rights reserved. Only training and service purposes.
  • Page 58 -56- Copyright © 2019 LG Electronics Inc. All rights reserved. Only training and service purposes.
  • Page 59 Change the CON1 CON5 Case 26th pin, 5th pin Assembly, CON1 CON5 (Loc. 500C) 20th pin, 5th pin Explain to the customer (Refrigerator is OK) -57- Copyright © 2019 LG Electronics Inc. All rights reserved. Only training and service purposes.
  • Page 60 Symptom Check Point 1. Crush mode 1. Check the loose connection doesn’t work 2. Check the resistance Ice Maker Geared Motor Dispenser Motor (BLDC Type) -58- Copyright © 2019 LG Electronics Inc. All rights reserved. Only training and service purposes.
  • Page 61 1st pin, 5th pin 2.37 ~ 2.73Ω 25th pin, 28th pin 27th pin, 28th pin CON1 CON5 20th pin, 5th pin 26th pin, 5th pin -59- Copyright © 2019 LG Electronics Inc. All rights reserved. Only training and service purposes.
  • Page 62 CON1 CON5 26th pin, 5th pin Change the Explain to the customer Case (Refrigerator is OK) Assembly, CON1 CON5 20th pin, 5th pin (Loc. 500C) -60- Copyright © 2019 LG Electronics Inc. All rights reserved. Only training and service purposes.
  • Page 63 Pushing Pushing 20.4V ↑ CON3 34th pin & 33rd pin 0~2V Pushing Resistance [˜ ] Pilot Valve 69.06 ~ 76.33Ω Water valve 24.03 ~ 26.56Ω -61- Copyright © 2019 LG Electronics Inc. All rights reserved. Only training and service purposes.
  • Page 64 34th pin & 33rd pin Is Water Valve resistance 0~2V 24.03 ~ 26.56Ω? Pushing Water Valve Resistance [Ω] Water valve 24.03 ~ 26.56 Explain to customer -62- Copyright © 2019 LG Electronics Inc. All rights reserved. Only training and service purposes.
  • Page 65 Not 0V, 5V Duct Status 26th pin ~ 25th pin Air Flow Windy CON3 Not 0V, 5V 27th pin ~ 25th pin Air Temperature Cold -63- Copyright © 2019 LG Electronics Inc. All rights reserved. Only training and service purposes.
  • Page 66 Check the Fan Motor voltage motor Is Fan PWM voltage 0V, 5V? TEST MODE 1 Voltage [V] CON3 Not 0V, 5V 27th pin ~ 25th pin Explain to customer -64- Copyright © 2019 LG Electronics Inc. All rights reserved. Only training and service purposes.
  • Page 67 Normal Door S/W Infinity Open Voltage [V] CON4 11.4~12.6V 24th pin ~ 23rd Pin LED Lamp Voltage [V] Closed 0~2V Blue & Black Open 11.4~12.6V -65- Copyright © 2019 LG Electronics Inc. All rights reserved. Only training and service purposes.
  • Page 68 CON4 24th pin ~ 23rd Pin Side LED Lamp voltage 11.4~12.6V? (While door open) Voltage [V] CON4 11.4~12.6V Change the LED Lamp 24th pin ~ 23rd Pin -66- Copyright © 2019 LG Electronics Inc. All rights reserved. Only training and service purposes.
  • Page 69 Normal Door S/W Infinity Open Voltage [V] CON7 11.4~12.6V 7th pin ~ 8th Pin LED Lamp Voltage [V] Closed 0~2V White & Yellow Open 11.4~12.6V -67- Copyright © 2019 LG Electronics Inc. All rights reserved. Only training and service purposes.
  • Page 70 CON7 7th pin ~ 8th Pin open) voltage 11.4 ~ 12.6V? Explain to customer Voltage [V] CON7 11.4 ~ 12.6V 7th pin ~ 8th Pin -68- Copyright © 2019 LG Electronics Inc. All rights reserved. Only training and service purposes.
  • Page 71 Status CON3 Not 0V, 5V 14th pin ~ 13th pin Air Flow Windy CON3 Not 0V, 5V 15th pin ~ 13th pin Air Temperature Cold -69- Copyright © 2019 LG Electronics Inc. All rights reserved. Only training and service purposes.
  • Page 72 Input Test1 Mode. (Push the button 1 time) Check the F Fan Motor Open the Freezer door and Go to 5 Check the air f low. Windy? -70- Copyright © 2019 LG Electronics Inc. All rights reserved. Only training and service purposes.
  • Page 73 Check the Fan Motor voltage Main PCB Is Fan PWM voltage 1~5V? TEST MODE 1 Voltage [V] CON3 Not 0V, 5V 15th pin ~ 13th pin Explain to customer -71- Copyright © 2019 LG Electronics Inc. All rights reserved. Only training and service purposes.
  • Page 74 8-20. Wi-Fi Modem Error (E Od) Symptom Check Point 1. E Od 1. Check the loose connection 2. Check the voltage -72- Copyright © 2019 LG Electronics Inc. All rights reserved. Only training and service purposes.
  • Page 75 Point 1. E CS 1. Check the loose connection 2. Check the voltage Resistance [Ω] Short CON4 Open 13th pin ~ 14th pin Other orma -73- Copyright © 2019 LG Electronics Inc. All rights reserved. Only training and service purposes.
  • Page 76 Replace the Is the sensor connection normal? refrigerator Go to 6 Check the Sensor resistance. Is resistance OFF (Sensor open)? Reconnect or repair the connector -74- Copyright © 2019 LG Electronics Inc. All rights reserved. Only training and service purposes.
  • Page 77 8-22 High/Low side Cycle leakage(Refrigerant leak of Sealed system problem) Error (E CH/E CL) • -75- ,Ȁ7/Ȁ, Copyright © 2019 LG Electronics Inc. All rights reserved. Only training and service purposes.
  • Page 78 -76- ,Ȁ70Ȁ, Copyright © 2019 LG Electronics Inc. All rights reserved. Only training and service purposes.
  • Page 79 STEP 1. Check Error Code -77- Copyright © 2019 LG Electronics Inc. All rights ,Ȁ71Ȁ, reserved. Only training and service purposes.
  • Page 80 STEP 2. Check sealed system -78- Copyright © 2019 LG Electronics Inc. All rights ,Ȁ72Ȁ, reserved. Only training and service purposes.
  • Page 81 STEP 3. Check restriction or comp -79- Copyright © 2019 LG Electronics Inc. All rights ,Ȁ73Ȁ, reserved. Only training and service purposes.
  • Page 82 STEP 4. Check high pressure side parts -80- ,Ȁ74Ȁ, Copyright © 2019 LG Electronics Inc. All rights reserved. Only training and service purposes.
  • Page 83 STEP 5. Check low pressure side parts -81- ,Ȁ75Ȁ, Copyright © 2019 LG Electronics Inc. All rights reserved. Only training and service purposes.
  • Page 84 STEP 6. Check the leak using UV Driver -82- ,Ȁ76Ȁ, Copyright © 2019 LG Electronics Inc. All rights reserved. Only training and service purposes.

  • Page 85: Reference

    Main PCB 2. How to remove Terminal Position Assurance (TPA) <AC TPA> <DC TPA> After measure the values, you should put in the TPA again. -83- Copyright © 2019 LG Electronics Inc. All rights reserved. Only training and service purposes.
  • Page 86 0.81 V 2.54 ㏀ 77°F (+25°C) 0.67 V 2.07 ㏀ 86°F (+30°C) 0.56 V 1.69 ㏀ 95°F (+35°C) 0.47 V 1.39 ㏀ 104°F (+40°C) 0.39 V -84- Copyright © 2019 LG Electronics Inc. All rights reserved. Only training and service purposes.
  • Page 87 1.64 V 10.74 ㏀ 77°F (+25°C) 1.45 V 8.89 ㏀ 86°F (+30°C) 1.27 V 7.40 ㏀ 95°F (+35°C) 1.10 V 6.20 ㏀ 104°F (+40°C) 0.96 V -85- Copyright © 2019 LG Electronics Inc. All rights reserved. Only training and service purposes.

  • Page 88: Component Testing Information

    Fuse-M (at all temperature) Sensor (at room temperature) Test Point Ressult Test Point Ressult (1) to (2) 0 ~ 0.1 Ω (1) to (2) 11 Ω -86- Copyright © 2019 LG Electronics Inc. All rights reserved. Only training and service purposes.
  • Page 89 R=(115x115)/200=66 Ω Infinitive value implies sheath heater is disconnected. Standard Sheath heater (at all temperature) Test Point Ressult (1) to (2) 62 ~ 70 -87- Copyright © 2019 LG Electronics Inc. All rights reserved. Only training and service purposes.
  • Page 90 Check the Reed S/W resistance -.No Magnet Magnet Center Magnet Center Switch Center Switch Center Good position Bad position -.Magnet Near the Switch -.Resistance & Service Action -88- Copyright © 2019 LG Electronics Inc. All rights reserved. Only training and service purposes.
  • Page 91 Push Hook Push Hook Push -89- Copyright © 2019 LG Electronics Inc. All rights reserved. Only training and service purposes.
  • Page 92 -.Magnet must be center of Switch -.No Magnet Magnet Center Magnet Center Switch Center Switch Center Good position Bad position -.Magnet Near the Switch -.Resistance & Service Action -90- Copyright © 2019 LG Electronics Inc. All rights reserved. Only training and service purposes.
  • Page 93 Push First push Second push -91- Copyright © 2019 LG Electronics Inc. All rights reserved. Only training and service purposes.
  • Page 94 Check the Reed S/W resistance -.No Magnet Magnet Center Magnet Center Switch Center Switch Center Good position Bad position -.Magnet Near the Switch -.Resistance & Service Action -92- Copyright © 2019 LG Electronics Inc. All rights reserved. Only training and service purposes.
  • Page 95 - . Check the Reed S/W resistance and if it is NG, Change it (Number 3) - . Assemble in reverse order how to disassemble -93- Copyright © 2019 LG Electronics Inc. All rights reserved. Only training and service purposes.
  • Page 96 - Dispenser DC Motor : When customer push the dispenser button, Pull duct door How to Measure Dispensor DC Motor Standard Dispenser DC Motor Test Points Result (1) to (2) 9.9 ~ 12.1 Ω -94- Copyright © 2019 LG Electronics Inc. All rights reserved. Only training and service purposes.
  • Page 97 Measure Standard Geared Motor (BLDC Type) Test Points Result 2rh pin, 11th pin 2st pin, 12th pin 2.37 ~ 2.73 Ω 11th pin, 12th pin -95- Copyright © 2019 LG Electronics Inc. All rights reserved. Only training and service purposes.
  • Page 98 Check to see if there is electrical current, if there is resistance the damper is good. Standard Damper Test Points Result Test Points Result Red and Yellow 270~330 Ω Blue and White 270~330 Ω -96- Copyright © 2019 LG Electronics Inc. All rights reserved. Only training and service purposes.
  • Page 99 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 kΩ -97- Copyright © 2019 LG Electronics Inc. All rights reserved. Only training and service purposes.

  • Page 100: Compressor Troubleshooting

    1 Input Action? > 60V Comp. PCBA Output Replace PCB Check Check Comp. About 5min Action? > 60V Cycle leakage Check Check the Comp. Cycle leakage -98- Copyright © 2019 LG Electronics Inc. All rights reserved. Only training and service purposes.
  • Page 101 - After initial power-up, when the compressor begins to operate, wait 10 minutes before checking. - The compressor is operating normally if the voltage is greater than 80V. -99- Copyright © 2019 LG Electronics Inc. All rights reserved. Only training and service purposes.
  • Page 102 Check Do not operate Harness connection Comp.? Replace Compressor is operate Check Comp. Compressor intermittently Check the leakage and cycle Recheck Stroke Trip Reset occur? -100- Copyright © 2019 LG Electronics Inc. All rights reserved. Only training and service purposes.
  • Page 103 LED blinking 3 times Repair Harness (No Connect Trip) Replace Do not operate Check Check Comp. Compressor Comp.? Harness connection Replace PCB Recheck No Connect Trip Reset occur? -101- Copyright © 2019 LG Electronics Inc. All rights reserved. Only training and service purposes.
  • Page 104 Compressor failure Compressor Current trip Recheck Reset occur? Replace Do not operate Clogging the Cycle? Compressor Comp.? Check the Repair leakage and cycle Sealed system -102- Copyright © 2019 LG Electronics Inc. All rights reserved. Only training and service purposes.
  • Page 105 → 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) -103- Copyright © 2019 LG Electronics Inc. All rights reserved. Only training and service purposes.
  • Page 106 Connection error → Comp Terminal resistance measurement (Power & Common, Save & Common) → Check the broken-down insulation : Comp. Save - Earth resistance measurement -104- Copyright © 2019 LG Electronics Inc. All rights reserved. Only training and service purposes.
  • Page 107 Is frost pattern Comp,Cond T > uniform? Is frost patern Ambient temp+5deg Uniform? Sealed System Sealed System is OK is OK Heavy repair -105- Copyright © 2019 LG Electronics Inc. All rights reserved. Only training and service purposes.
  • Page 108 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 -106- Copyright © 2019 LG Electronics Inc. All rights reserved. Only training and service purposes.
  • Page 109 2. If the same symptom (IPM) arises after the first - off - on -on - on- - off ··· repeating ··· action, replace PCB -107- Copyright © 2019 LG Electronics Inc. All rights reserved. Only training and service purposes.
  • Page 110 Check the The system Perform sealed refrigeration system. is faulty. system repair. Check the The operation of the Replace the Thermistor. Thermistor is incorrect. Thermistor. -108- Copyright © 2019 LG Electronics Inc. All rights reserved. Only training and service purposes.

  • Page 111: Icemaker Opearting And Trouble Shooting

    Use a vacuum cleaner with a soft brush to clean the grille, the open areas behind the grille and the front surface area of the condenser. Replace the mechanical cover. ｡｡ -109- Copyright © 2019 LG Electronics Inc. All rights reserved. Only training and service purposes.
  • Page 112 Compressor Not Pumping Trace of Oil Leak Undercharge (The equalization test is trying to restart a compressor using a start kit after it has been operating.) -110- Copyright © 2019 LG Electronics Inc. All rights reserved. Only training and service purposes.
  • Page 113 12. ICEMAKER OPERATING METHOD AND TROUBLE SHOOTING Test Button -111- Copyright © 2019 LG Electronics Inc. All rights reserved. Only training and service purposes.
  • Page 114 How long has customer waited for icemaker to make ices? If the issue haven’t resolved yet, though you have checked all the items above, go to next step. -112- Copyright © 2019 LG Electronics Inc. All rights reserved. Only training and service purposes.
  • Page 115 12-3-2 Icemaker not making ice or not making enough ice (Icemaker Unit & Ice-detecting sensor Diagnosis) -113- Copyright © 2019 LG Electronics Inc. All rights reserved. Only training and service purposes.
  • Page 116 - Cap duct doesn’t seal the air properly. Resolution : Possibly, warm air could get into the compartment and make ices get stuck. Replace the cap duct with new one. -114- Copyright © 2019 LG Electronics Inc. All rights reserved. Only training and service purposes.

  • Page 117: Ice Maker (Freezer Room) Operating Method And Trouble

    ※ Before you carry out the test mode, - Check the error code on display and follow 13-3 - Check if the power switch is ON Automatic Power shut off Arm switch -115- Copyright © 2019 LG Electronics Inc. All rights reserved. Only training and service purposes.
  • Page 118 13. 3. ICE MAKER (Freezer Room) OPERATING METHOD AND TROUBLE SHOOT 13-3 Icemaker Issue Verification -116- Copyright © 2019 LG Electronics Inc. All rights reserved. Only training and service purposes.
  • Page 119 13. 3. ICE MAKER (Freezer Room) OPERATING METHOD AND TROUBLE SHOOT 13-3 Icemaker Issue Verification -117- Copyright © 2019 LG Electronics Inc. All rights reserved. Only training and service purposes.

  • Page 120: Description Of Function & Circuit Of Micom

    After replacing the air filter, press and hold the Fresh Air Filter button for three seconds to turn the icon light off. Replace the air filter approximately every six months. -118- Copyright © 2019 LG Electronics Inc. All rights reserved. Only training and service purposes.
  • Page 121 Wi-Fi The Wi-Fi button, when used with the LG ThinQ app, allows the refrigerator to connect to a home Wi-Fi network. Refer to Smart Functions for information on the initial setup of the application. icon shows the status of the refrigerator's network connection. The icon illuminates when the refrigerator is connected to the Wi-Fi network.
  • Page 122 2. The Failure sensing method is the same as in the fan motor of the freezing fan motor (refer to failure diagnosis function table for failure display). Copyright © 2019 LG Electronics Inc. All rights -120- reserved. Only training and service purposes.
  • Page 123 LCD graphics on. If releasing the button, the LCD graphic displays the previous status. You can check the error code Within 3-hour Period from initial error -121- Copyright © 2019 LG Electronics Inc. All rights reserved. Only training and service purposes.
  • Page 124 It has to provide "409D" together. 500P 103B 303F 271D 120A 406D 631C 150H 145A 271B 262H 503A 120B 249L 312D 262B 249M 145S 312C 106A 610B Copyright © 2019 LG Electronics Inc. All rights reserved. Only training and service purposes.
  • Page 125 FULL CONVERT DRAWER PARTS 264B 150E 150G 264B 205D 136E Copyright © 2019 LG Electronics Inc. All rights reserved. Only training and service purposes.
  • Page 126 131A 145F 136C 136F 145C 136A 205D 132P 249C 150B 150A 406F 253D 150C 150D 249D Copyright © 2019 LG Electronics Inc. All rights reserved. Only training and service purposes.
  • Page 127 142A 141A 141A 143A 154A 162A 141B 151A 162B 162C 151B Copyright © 2019 LG Electronics Inc. All rights reserved. Only training and service purposes.
  • Page 128 231B 180A 275A 233B 276A 235A 405A 276I 612B 612C 276B 241A 402C 276C 278D 243C 262C 243B 278H 241B 262E 279K 279A 630J 630J 244A Copyright © 2019 LG Electronics Inc. All rights reserved. Only training and service purposes.
  • Page 129 When “409G” is serviced, It has to provide “104A” together. 104A 409G 241M 409I 279M 243F 405M 243H 243G 233E 287A 233G 207D 250W 241G 232A 241H 244F 312F Copyright © 2019 LG Electronics Inc. All rights reserved. Only training and service purposes.
  • Page 130 160C 406K 250B 406J 206L 250E 250B 203A 253E 201A 212D 206K 250H 407G 249F 250A 250H 249K 253A 249E 206L 249J 203B 206K 212D 201B Copyright © 2019 LG Electronics Inc. All rights reserved. Only training and service purposes.
  • Page 131 612A 630F 600A 630C 630A 607A 630H 601C 630D 630E 619C 630Q 630G 603B 619B 624D 312B 600F Freezer Room ICE Maker 615A 624G 624C 624A Copyright © 2019 LG Electronics Inc. All rights reserved. Only training and service purposes.
  • Page 132 623B 616J 623C 619F 616F 627A 616E 616S 616R 619A 603B 619J 603C Copyright © 2019 LG Electronics Inc. All rights reserved. Only training and service purposes.
  • Page 133 302C 408A 400A 408B 301A 105A 313A 314A 308A 318A 403B 317A 300A 305C 305B 308B 308C 306A 619D 305B 305C 304A 303C 310B 303A 303D Copyright © 2019 LG Electronics Inc. All rights reserved. Only training and service purposes.
  • Page 134 Mar., 2020 Printed in Korea P/No.:MFL68744274...

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