LG LTCS20220W Service Manual
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LG LTCS20220W Service Manual

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REFRIGERATOR
SERVICE MANUAL
CAUTION
BEFORE SERVICING THE UNIT,
READ THE SAFETY PRECAUTIONS IN THIS MANUAL.
MODELS:
LTCS20220W /01
LTCS20220B /01
LTCS20220S /01

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Summary of Contents for LG LTCS20220W

  • Page 1 REFRIGERATOR SERVICE MANUAL CAUTION BEFORE SERVICING THE UNIT, READ THE SAFETY PRECAUTIONS IN THIS MANUAL. MODELS: LTCS20220W /01 LTCS20220B /01 LTCS20220S /01...

  • Page 2: Table Of Contents

    CONTENTS WARNINGS AND SAFETY PRECAUTIONS ..................1. SPECIFICATIONS ......................... 2. PARTS IDENTIFICATION ......................3. DISASSEMBLY..........................3-1 Remove Freezer Door....................... 3-2 Remove Refrigerator Door......................3-3 Replace Refrigerator Door......................3-4 Replace Freezer Door....................... 3-5 Reverse Freezer Door....................... 3-6 Reverse and Reattached Refrigerator Door................3-7 Leveling and Door closing......................

  • Page 3: Specifications

    1. SPECIFICATIONS LTCS20220W /00 LTCS20220B /00 LTCS20220S /00 LTCS24223W /00 LTCS24223B /00 LTCS24223S /00 SPECIFICATIONS Color Black Black White Stainless White Stainless Dimensions (W*D*H) (29 3/4 x 28 15/16 x 66 3/16)in (32 3/4 x 28 15/16 x 68 9/16)in...

  • Page 4: Parts Identification

    2. PARTS IDENTIFICATION Use this section to become more familiar with the parts and features. NOTE: This guide covers several diferent models. The refrigerator you have purchased may have some or all of the items listed below. The locations of the features shown below may not match your model. Custom Cube Icemaker * Pantry Drawer Ice Bin...

  • Page 5: Disassembly

    3. DISASSEMBLY WARNING WARNING Electrical Shock Hazard Excessive Weight Hazard: • Disconnect the electrical supply to the refrigerator Use two or more people to remove and install the before installing. Failure to do so could result in refrigerator doors. Failure to do so can result in back or other injury.

  • Page 6: Replace Refrigerator Door

    REPLACING THE REFRIGERATOR DOOR Carefully force-fit the top hinge cover back into place over the hinge. Lower the door onto the bottom hinge pin. Place the hinge pin of the middle hinge bracket inside of the hinge pin insert on top of the door. Hold the door in place and line the middle hinge bracket with the holes in the refrigerator housing.

  • Page 7: Reverse And Reattached Refrigerator Door

    Slightly lift up the refrigerator door and remove it. Pry off the cover on the top left side of the refrigerator to uncover the screw holes. Middle Hinge Bracket Set the freezer door and top hinge parts to the side and remove the refrigerator door.
  • Page 8 Loosen and remove the two bolts and use the Phillips head Remove the Decorative Caps on the bottom of the screwdriver to remove the Middle Hinge Bracket from the refrigerator housing. You will need these holes for the Bottom refrigerator housing. Set parts aside. Hinge.
  • Page 9 With a flat-head screwdriver, carefully pry off and REATTACHING THE DOORS remove the cover over the screw holes on the left side of Place the freezer door down over the Hinge Pin on the Middle refrigerator housing. Hinge Pin Bracket. Fig.

  • Page 10: Leveling And Door Closing

    After changing the doors, make sure that the corners of the Door Gaskets are not folded over. To ensure a good seal, apply a small amount of silicon grease on the corners of gaskets. Corners Fig. 53 DOOR ALIGNMENT If the space between your doors is uneven, follow the instructions below to align the doors.

  • Page 11: Defrost Control Assembly

    3-10 DEFROST CONTROL ASSEMBLY 3-12 CONTROL BOX-REFRIGERATOR Defrost Control assembly consists of Defrost Sensor and 1. First, remove all shelves in the refrigerator. Then remove the FUSE–M. Refrigerator Control Box by loosening 2 screws. Defrost sensor functions to defrost automatically. It is attached to metal side of the Evaporator and senses Temperature.

  • Page 12: Adjustment

    COMPRESSOR ELECTRICAL 4-2-3 PTC - Applied Circuit Diagram 4-1 COMPRESSOR Starting Method for the Motor 4-1-1 Role COMPRESSOR The compressor intakes low temperature and low pressure gas ACCESORIES from the evaporator of the refrigerator and compresses this gas to high temperature and high pressure gas. It then delivers the gas to the condenser.

  • Page 13: Olp (Overload Protector)

    4-2-8 Note for using the PTC-Starter (1) Be careful not to allow over-voltage and over-current (2) Do not drop or handle carelessly. (3) Keep away from any liquid. If liquid such as oil or water enters the PTC, PTC materials may fail due to breakdown of their insulating capabilities.

  • Page 14: Circuit Diagram

    5. CIRCUIT DIAGRAM - 14 -...

  • Page 15: Troubleshooting

    6. TROUBLESHOOTING 6-1 COMPRESSOR AND ELECTRIC COMPONENTS (Rated voltage Remove PTC-Starter Power Source. ±10%)? from compressor and measure voltage between Terminal C of compressor and terminal 5 or 6 of PTC OLP disconnected? No voltage. Replace OLP. Check connection condition. Reconnect.

  • Page 16: Ptc And Olp

    6-2 PTC AND OLP Observation value is Separate PTC-Starter Normal operation of 115V/60Hz : 6.8 ±20% compressor is impossible from Compressor and at room temperature 25 c or poor. measure resistance between No. 5 and 6 of PTC-Starter with a T ester.

  • Page 17: Other Electrical Components

    6-3 OTHER ELECTRIC COMPONENTS • Not cooling at all 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.

  • Page 18: Service Diagnosis Chart

    6-4 SERVICE DIAGNOSIS CHART COMPLAINT SYMPTOM POSSIBLE CAUSES SOLUTION 1. Check supply voltage to refrigerator 1. Supply voltage not within specifications 1. No Display at all Electronic Display not operating correctly 2. Chack wiring and connectors to PWB board 2. Open in wiring harness from PWB board 3.

  • Page 19: Refrigeration Cycle

    6-5 REFRIGERATING CYCLE • Troubleshooting Chart TEMPERATURE STATE OF STATE OF THE CAUSE REMARKS OF THE THE UNIT EVAPORATOR COMPRESSOR PARTIAL Freezer Low flowing sound of A little higher • Refrigerant level is low due LEAKAGE compartment and Refrigerant is heard and than ambient to a leak.

  • Page 20: Operation Principle And Repair Method Of Icemaker

    7. ICE MAKER OPERATION PRINCIPLE AND REPAIR METHOD OF ICEMAKER 7-1 OPERATION PRINCIPLE 7-1-1 Operation Principle of Icemaker Power On Start Position • Adjusts Ejector to Start Position whit power on. Icemaking • Waits until water becomes cold after starting the Mode Icemaking operation.

  • Page 21: Icemaker Functions

    7-2 ICEMAKER FUNCTIONS 7-2-1 Start Position 1. After POWER OFF or Power Outage, check the EJECTOR's position with MICOM initialization to restart. 2. How to check if it is in place: - Check HIGH/LOW signals from HALL SENSOR in MICOM PIN. 3.
  • Page 22 7-2-4 Fill/Park Position 1. Once a normal harvest mode has been completed, the water solenoid will be activated. 2. The amount of water is adjusted by inserting a “pin” into small hole located at front of ice maker. These changes the time allowed for fill as illustrated in the table below.

  • Page 23: Defect Diagnosis Function

    7-2-5 Function TEST 1. This is a compulsory operation for test, service, cleaning, etc,. Insert pin pressing internal button. 2. The test works only in the Icemaking Mode. It cannot be entered from the Harvest or Fill mode. (If there is an ERROR, it can only be checked in the TEST mode.) 3.

  • Page 24: Description Of Function & Circuit Of Micom

    8. CIRCUIT OF MICOM DESCRIPTION OF FUNCTION & CIRCUIT OF MICOM 8-1 FUNCTION 8-1-1 Function 1. When the appliance is plugged in, is set to middle for the refrigerator. You can adjust the Refrigerator control temperature by pressing the TEMPERATURE ADJUST button. 2.
  • Page 25 8-1-4 Defect Diagnosis Function 1. If there is a problem, an error code will appear.. 2. The buttons will not operate. 3. When the problem is repaired, the display will return to normal. 4. The error code is displayed using the LEDs. •...
  • Page 26 8-1-5 TEST MODE 1. Test mode allows checking the PCB and the function of the product as well as determining the Defective part in case of an error. 2. The test button is on the main PCB of the refrigerator (Test S/W). 3 While in the test mode, the “Temperature Adjust”...

  • Page 27: Pcb Function

    8-2 PCB FUNCTION CON 7 CON 5 CON 4 CON 6 CON 9 CON 8 CON 2 CON 1 - 27 -...
  • Page 28 8-2-1 Power Circuit Power is supplied to the control board at the pin 11 and 9 of connector #1. (Refer to figure 1) FIGURE 1 8-2-2 Load and Door Light Circuit (HV) 1. Load Drive Condition Check To measure outputs of the control board, check voltages between the pins for the following components: (Refer to figure 1) Output CONNECTOR 1...
  • Page 29 3. LED Power Circuit (LV) Output CONNECTOR 6 Circuit Pin Number Pin Number Voltage LED Power Con 6 Pin 10 Con 6 Pin 11 12 VDC DISPLAY 8-2-3 Temperature Sensor Circuit (Refer to figure 2) Voltage supplied to each sensor wil range between 0.5 volts -22°F(-30°C) and 4.5 volts 122°F(50°C) depending upon the temperature in the compartments.

  • Page 30: Resistance Specification Of Sensor

    8-3 RESISTANCE SPECIFICATION OF SENSOR RESISTANCE OF REFRIGERATOR & TEMPERATURE VOLTAGE DEFROST SENSOR -20 °C (-4 °F) 3.73 -15 °C (5 °F) 3.49 -10 °C (14 °F) 47.3 3.22 -5 °C (23 °F) 2.95 38.4 0 °C (32 °F) 2.67 5 °C (41 °F) 24.1 10 °C (50 °F)
  • Page 31 #EV# 9. EXPLODED VIEW CASE PARTS CAUTION: Use the part number to order part, not the position number 103A 401A 301A 281A 281B 103A 501F 282E 311A 418A 411A 404X 282B 406B 501A 304A 282H 120A 120A 158C 120A 120E 410A 402D 120A...
  • Page 32 #EV# FREEZER PARTS CAUTION: Use the part number to order part, not the position number 405F 332A 330B 405C 319E 332B 404A 110D 329A 284A 404Z 149F...
  • Page 33 #EV# REFRIGERATOR PARTS CAUTION: Use the part number to order part, not the position number 143A 143F 167F 155F 170A 167B 154A 151C 151D 155B 151A 151A...
  • Page 34 #EV# DOOR PARTS CAUTION: Use the part number to order part, not the position number 200A 201A 203A 212G 205A 286A 205A 210B 210A 230A 241A 233A 231A 281E 241C 241C 286A 241D 210C...
  • Page 35 #EV# ICE MAKER PARTS CAUTION: Use the part number to order part, not the position number 600C 602A 600A 619C 618A 623A 131A 627A...
  • Page 36 P/No. MFL31442314 May, 2015...

This manual is also suitable for:

Ltcs20220sLtcs20220b

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