LG LTCS20020W Service Manual
  1. Manuals
  2. Brands
  3. LG Manuals
  4. Refrigerator
  5. LTCS20020W
  6. Service manual

LG LTCS20020W Service Manual

Hide thumbs Also See for LTCS20020W:
Table of Contents

Advertisement

Quick Links

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 prohibition 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.
MODELS:
LTCS20020W
1

Advertisement

Table of Contents
loading
Need help?

Need help?

Do you have a question about the LTCS20020W and is the answer not in the manual?

Questions and answers

Joan
January 24, 2025

trying to take shelf out to clean

0
1 comments:
Mr. Anderson
May 14, 2025

To remove a shelf from the LG LTCS20020W refrigerator:

1. Tilt up the back of the shelf.
2. Lift the shelf up and pull it out.

Use special care as glass shelves are heavy and may break if exposed to sudden temperature changes or impact.

This answer is automatically generated

0

Subscribe to Our Youtube Channel

Related Manuals for LG LTCS20020W

Summary of Contents for LG LTCS20020W

  • 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 prohibition includes, without limitation, any text, graphics or logos in this Service Manual.

  • Page 2: Table Of Contents

    This may cause frost bite. must be performed by a CFC certified technician. 6. Prevent water from spiling on to electric elements or the machine parts. Copyright © 20 LG Electronics Inc.All right s reserved. - 2 - Only training and service purposes.

  • Page 3: Specifications

    T ray m eat T ray egg B as k et, Q uantity P las tic (2) Lam p S helf G las s (1) Copyright © 20 20 LG Electronics Inc.All right s reserved. Only training and service purposes.

  • Page 4: Parts Identification

    2. PARTS IDENTIFICATION Use this page to become mo re familiar with the parts and features of your refrigerator. Page references are included for your convenience. NOTE: This guide covers several models. The refrigerator you have purchased may have some or all of the i tems listed below.

  • Page 5: Disassembly

    3. DISASSEMBLY (For additional support on this topic, including helpful videos, please visit us at: www.lg.com). If entrance is lees than 35 inch es wide, the refrigerator’s door will need to be removed. IMPORTANT: Before starting, turn off and unplug the refrigerator. Remove all food and the racks from the doors.
  • Page 6 REFRIGER REFRIGER TALLATION TALLATION 4. Replacing Freezer Door Fig. 6 Set the freezer door onto the Middle Hinge pin (Figure 10). Place upper hinge in the top of the freezer door and line up the hinge with the holes in top of refrigerator. Use the three bolts to fasten the hinge (See Figure 11).
  • Page 7 HOW TO REVERSE AND INSTALL THE REFRIGER ATOR DOORS Y ou may find it more convenient to have the doors converted from the left opening type (factory installed) to the right opening type. Directions refer to the right side as the side on your right as you face the unit. TOOLS YOU MIGHT NEED OR USE Hex Soc ket Wr ench Phillips Screwdriver No.
  • Page 8 2. Reversing and Reinst alling Refrigerator Door Using a ¼” socket wr ench, loosen and remove Hinge Pin fr om the Middle Hinge Bracket. Remove washer undernea th the middle hinge and set aside. NOTE: At this point the door will be loose. Slightly lift the door and remove it.
  • Page 9 Flip the Middle Hinge Bracket, (flange will now be on Door top) position it on left side of the refrigerator and reattach Closer/ with two bolts and a Phillips screwdriver. Place the Stop refrigerator door down over the pin on the bottom hinge. Place the washer between the refrigerator door and Hinge middle hinge and re-attach Hinge Pin to Hinge Bracket...
  • Page 10 If not, tilt the refrigerator slightly more to the rear by turning both Leveling Screws clockwise. It may take several more turns, and you should turn both Leveling Screws the same times. Copyright © 2020 LG Electronics Inc. All rights reserved. Only training and service purposes.

  • Page 11: Troubleshooting Compressor

    If COMP & FAN are not operated at the same time, check the operation after forcing the operation in TEST MODE in MAIN PCB, and perform power RESET after checking the voltage on COMP side. Copyright © 20 LG Electronics Inc. All rights reserved. Only training and service purposes.
  • Page 12 (Check C) Heavy repair Leakage? Replace Comp. Check again Is Comp in Replace PCB operation? Check Comp. (Check C) Heavy repair Leakage? Check again Copyright © 20 LG Electronics Inc.All right s reserved. Only training and service purposes.
  • Page 13 2. If same error occurs part (IPM) after 1, replace Blink Blink Blink Blink Blink Blink Blink Blink Blink Blink Blink Blink Blink Blink Repeated PCB. Copyright © 20 LG Electronics Inc.All right s reserved. Only training and service purposes.
  • Page 14 Actions: check CC310 voltage and if it is outside 2.2~2.8V, replace PCB LED blinking 1 Check time protection AD-offset Error logic Replace Is it out of Spec.? (2.2-2.8V) Power Reset Copyright © 20 LG Electronics Inc.All right s reserved. Only training and service purposes.
  • Page 15 HarnessP Logic Trip) Check PCB Replace PCB output Check PCB output Check Power Replace Check inspection Did Current trip Compressor Reset Compressor procedure again occur? defect Copyright © 20 LG Electronics Inc. All rights reserved. Only training and service purposes.
  • Page 16 Fault) logic Visual Check Point A short Compressor is not Replace PCB verification of circuit IPM output activated IPM burn >80V-20% Re-confirm Power inspection Reset procedure Copyright © 20 LG Electronics Inc.All right s reserved. Only training and service purposes.
  • Page 17 Check COMPRESSOR & HARNESS Measure COMP connector resistance (Power & Common) Check insulation destruction : measure the resistance between the COMP Copyright © 20 LG Electronics Inc. All rights reserved. power connector and the grounding. Only training and service purposes. Multi...

  • Page 18: Service Diagnosis Chart

    Replace the Check if dew forms Defrosting is components of in the freezer. poor. defrosting circuit. Check refrigerator The cycle is Repair the cycle. Cycle. faulty. Copyright © 20 LG Electronics Inc. All rights reserved. Only training and service purposes.

  • Page 19: Compressor

    Multi Tester Motor resistance Compressor 13.85 ± 5 BMG110NAMV There may be resistance value differences of several according to the ambient temperature or operation condition. Multi Tester Copyright © 20 LG Electronics Inc. All rights reserved. Only training and service purposes.
  • Page 20 (2) Replace Quick Coupler in case of leakage. Put all Joint Pipe in a clean box and PIPE cover tightly with the lid so that dust or humidity is not inserted. Copyright © 20 LG Electronics Inc.All right s reserved. Only training and service purposes.

  • Page 21: Circuit Diagram

    6. CIRCUIT DIAGRAM OPTIONAL PARTS ON CIRCUIT DIAGRAM ARE SUBJECT TO CHANGE IN DIFFERENT LOCALITIES AND MODEL TYPE. OPTIONAL PARTS ARE REPRESENTED WITH DOTTED LINE. / LAS PARTES OPCIONALES EN EL DIAGRAMA DE CIRCUITO ESTAN SUJETOS A CAMBIO EN DIFERENTE LOCALIDAD Y TIPO DE MODELO.

  • Page 22: Troubleshooting

    7. TROUBLESHOOTING 7-1. COMPRESSOR AND ELECTRIC COMPONENTS Remove PTC-Starter (Rated voltage Remove PTC-Starter Power Source. from compressor and from compressor and measure voltage measure voltage between T erminal C of between T erminal C of compressor and compressor and terminal 5 or 6 of PTC. terminal 5 or 6 of PTC.

  • Page 23: Ptc And Olp

    7-2 OLP Normal operation of Separate OLP from Check another Compressor is Compressor and check e l e c t r i c c o m p o n e n t . resistance value not working or poor. between two termianls of OLP with a Tester.

  • Page 24: Other Electric Components

    7-3 OTHER ELECTRIC COMPONENTS Check for open short or Compressor Cause incorrect resistance readings doesn't run. in the following components a. Starting devices Short, open, or broken. Poor contact b. OLP or shorted. Coil open or shorted. c. Compressor coil Poor contact Replace d.

  • Page 25: Service Diagnosis Chart

    1. Open in defrost circuit Not defrosting 1. Freezer has too much frost 2. Check sensor 2. Defrost sensor not operating correctly 3. Check drain 3. Defrost drain clogged Copyright © 20 LG Electronics Inc. All rights reserved. Only training and service purposes.

  • Page 26: Refrigerating Cycle

    Recharge refrigerant Repair it. (check correct quantity) Frost formed Frost formed Moisture restriction. No frost normally Replace normally intermittent problem. normally Compressor Finished OK Restriction Copyright © 20 LG Electronics Inc. All rights reserved. Only training and service purposes.

  • Page 27: Circuit Of Micom

    113°F (45°C . COMP, COMP, 0.5 Sec 0.5 Sec F-FAN F-FAN ( ON : / OFF : Temp Medium/ Medium/ Medium High Control Mode High TEMP(°C) Copyright © 20 LG Electronics Inc. All rights reserved. Only training and service purposes.
  • Page 28 Temperature of defrost Heater Heater Heater Heater sensor is lower than sensor is lower than 5 Sec 113°F (45°C) 113°F (45°C . COMP, COMP, 10 Sec F-FAN F-FAN Copyright © 20 LG Electronics Inc. All rights reserved. Only training and service purposes.
  • Page 29 Signal (motor could be Compartment locked) Failure of Fan If there is not motor Motor at Normal Normal Normal signal (motor could mechanic room be locked) Copyright © 20 LG Electronics Inc. All rights reserved. Only training and service purposes.
  • Page 30 Note: If door is opened within the first 5 minutes from power on the demonstration mode, it will be released and set at middle level automatically. Copyright © 20 LG Electronics Inc. All rights reserved. Only training and service purposes.

  • Page 31: Smart Diagnosis & Door Alarm

    11) Cooling BLDC FAN Motor Error 3. Reference 1) Temperature compensation 2) TEST MODE and Removing TPA 3) TEMPERATURE CHART - REF AND DEFROST SENSOR 4) TEMPERATURE CHART - RT SENSOR Copyright © 20 LG Electronics Inc. All rights reserved. Only training and service purposes.
  • Page 32 - CON201 : OLP Optional Connectors - CON 7 : Touch Display PCB - CON 9: Ice Maker twisting 2. BOARD SYSTEM P/N: EBR64730407 DIAGNOSIS INTELLIGENT (SDS) Copyright © 20 LG Electronics Inc. All rights reserved. Only training and service purposes.
  • Page 33 1-1. MAIN PCB Part Name Picture P/N: EBR807574** PCB PJT QT 20 (220-230V) P/N: EAD61445250 Power Cord PJT Plug C4 (220V) Copyright © 20 LG Electronics Inc. All rights reserved. Only training and service purposes.
  • Page 34 1-2. DISPLAY PCB & LED Lighting P/N: EBR59400502 Basic Models Tact and Inner Display P/N: EBR59400503 Dispenser Models Tact and Inner Display P/N: ACQ89591801 R-Room LED Module Copyright © 20 LG Electronics Inc. All rights reserved. Only training and service purposes.
  • Page 35 15.91 3.070V 68°F (+20°C) 13.03 2.829 V 77°F (+25°C) 10.74 2.589 V 86°F (+30°C) 8.89 2.354 V 95°F (+35°C) 7.40 2.128V 104°F (+40°C) 6.20 1.914 V Copyright © 20 LG Electronics Inc. All rights reserved. Only training and service purposes.
  • Page 36 (1) To (2) Result 23°F °C 32°F °C 41°F °C 50°F °C 19.5 59°F °C The sensor is determined by the temperature. For example, 30 indicates 32°F. Copyright © 20 LG Electronics Inc. All rights reserved. Only training and service purposes.
  • Page 37 1.- Unplug evaporator heater connector . The sensor is determined by 2.- Check resistance in wires Orange to the temperature. Orange. For example, 30 indicates 32°F. Copyright © 20 LG Electronics Inc. All rights reserved. Only training and service purposes.
  • Page 38 Push the button 1 times. (normal) Check voltage in wires Brown to Blue in connector CON2 Result SVC Action Nomal Replace Main PCB 220VAC ± 10VAC Copyright © 20 LG Electron ics Inc. All rights reserved. Only training and service purposes.
  • Page 39 If there is continuity, go to step 4. NOTE: For detecting continuity, the magnet and switch magnetic must be aligned. Copyright © 20 LG Electronics Inc. All rights reserved. Only training and service purposes.
  • Page 40 Check voltage in Refrigerator LED Connector Status Result SVC Action 12 V Change Freezer LED Open Other Change the PCB Normal Closed Other Change the PCB Copyright © 20 LG Electronics Inc. All rights reserved. Only training and service purposes.
  • Page 41 Result SVC Action It feel sticky, change the motor. (cause of ice or rust inside of motor) Motor Release Check section Cooling BLDC Fan Motor Error Copyright © 20 LG Electronics Inc. All rights reserved. Only training and service purposes.
  • Page 42 Input Test 2 Mode and Status SVC Action Check the air flow. (push the button 1 time) Windy Change the PCB No windy It ’s normal Copyright © 20 LG Electronics Inc. All rights reserved. Only training and service purposes.
  • Page 43 Change the PCB <CON5> Check the FAN Motor Feedback Voltage in wires Blue to Gray. Status SVC Action 1~4 Vdc Normal Other Change the PCB <CON5> Copyright © 20 LG Electronics Inc. All rights reserved. Only training and service purposes.
  • Page 44 Below 1V or 16V Change the PCB Check the FAN Motor Feedback Voltage Status SVC Action in wires Black to Purple. 1~4 Vdc Normal Other Change the PCB Copyright © 20 LG Electronics Inc. All rights reserved. Only training and service purposes.
  • Page 45 JCR2 JCR3 Poor cooling compensation JCR4 * JCR1 cuts : +1 * JCR2 cuts : +1 * JCR3 cuts : -1 * JCR4 cuts : -1 Copyright © 20 LG Electronics Inc. All rights reserved. Only training and service purposes.
  • Page 46 TEST MODE 2 2. How to remove Terminal Position Assurance (TPA) <AC TPA> <DC TPA> * After measure the values, you should put in the TPA again Copyright © 20 LG Electronics Inc. All rights reserved. Only training and service purposes.
  • Page 47 501B 120B 105A 503G 317A 318A 314A 106A 327A 316A 283B 323B 305B 106A 305C 307A 312A 315A 405D 420A 319F 405G 329C 319D 305C 305B Copyright © 2020 LG Electronics Inc.All right s reserved. Only training and service purposes.
  • Page 48 #EV# FREEZER PARTS 405F 332A 330B 405C 319E 404A 110D 332B 329A 282X 284B 284E 284A 404Z 149F Copyright © 2020 LG Electronics Inc.All right s reserved. Only training and service purposes.
  • Page 49 #EV# REFRIGERATOR PARTS 143A 167B 154A 151C 151D 155B 151A 151A Copyright © 2020 LG Electronics Inc.All right s reserved. Only training and service purposes.

  • Page 50: Exploded View

    #EV# DOOR PARTS 200A 201A 203A 212G 205A 286A 205A 210B 210A 230A 241A 233A 231A 281E 241C 241C 286A 210C Copyright © 2020 LG Electronics Inc.All right s reserved. Only training and service purposes.
  • Page 51 MFL71772901 Mar.2020...

Table of Contents

Save PDF