LG LFX23961 Series Service Manual
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LG LFX23961 Series Service Manual

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See also: Owner's Manual
REFRIGERATOR
SERVICE MANUAL
CAUTION
BEFORE SERVICING THE UNIT,
READ THE SAFETY PRECAUTIONS IN THIS MANUAL.
MODELS:
LFX23961**

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Summary of Contents for LG LFX23961 Series

  • Page 1 REFRIGERATOR SERVICE MANUAL CAUTION BEFORE SERVICING THE UNIT, READ THE SAFETY PRECAUTIONS IN THIS MANUAL. MODELS: LFX23961**...

  • Page 2: Table Of Contents

    CONTENTS SAFETY PRECAUTIONS ..........................1. SPECIFICATIONS ........................... 2. PARTS IDENTIFICATION ........................3. DISASSEMBLY ............................3.1 Door ..............................3.2 Door alignment ............................ 3.3 Fan and fan motor ..........................3.4 Defrost control assembly ........................3.5 Lamp ..............................3.6 Multi duct ............................. 3.7 Main PWB.............................

  • Page 3: Specifications

    1. SPECIFICATIONS ITEMS SPECIFICATIONS ITEMS SPECIFICATIONS DOOR DESIGN Side Rounded VEGETABLE TRAY Opaque Drawer Type DIMENSIONS (inches) H) 21cu.ft COMPRESSOR Recipro H) 25cu.ft EVAPORATOR Fin Tube Type 302.58 (21cu.ft) CONDENSER Wire Condenser NET WEIGHT (pounds) 324.18 (25cu.ft) REFRIGERANT R-134a (120 g) COOLING SYSTEM Fan Cooling LUBRICATING OIL...

  • Page 4: Parts Identification

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

  • Page 5: Disassembly

    3. DISASSEMBLY 3-1 DOORS 1. Removing Refrigerator Door NOTE: Handle appearance may vary. IMPORTANT: Before you begin, turn the refrigerator OFF and unplug it. Remove food and any bins from doors. Left Door Loosen the screws and remove the cove on back side (see figure A). Disconnect water supply tube by pushing back on the disconnect ring (3).
  • Page 6 Door Gasket Removal Door Gasket Replacement 1. Insert gasket bracket clips 1. Remove door frame cover Starting at top of cover and working down, snap cover 1) Insert gasket bracket edge beneath door frame edge. out and away from door. 2) Turn upper gasket bracket spring so that the spring ends are in the door channel.

  • Page 7: Door Alignment

    2) Press gasket into channels on the three remaining 3-2 DOOR ALIGNMENT sides of door. If fridge door are uneven, • Use the wrench (Included with the User Manual) to adjust the bolt in the door hinge to adjust the height.(CCW to raise or CW to lower the height.) Figure 6 3.

  • Page 8: Defrost Control Assembly

    3-5 LAMP * Ice Fan Scroll Assembly Replacement 1) Remove the plastic guide for slides on left side by unscrewing phillips head screws. 2) Pull the grille forward as shown in the second picture. 3) Disconnect wire harness of the grille 4) Remove the scroll assembly by loosening 3 screws Figure 12 3-5-1 Refrigerator Compartment Lamp...

  • Page 9: Multi Duct

    3-6 MULTI DUCT 1. Remove the upper and lower Caps by using a flat screwdriver, and remove 2 screws. (Figure 16) 2. Disconnect the lead wire 5) Remove the 4) If nozzle is interfered with button , push and on the bottom position. connected part of pull out the bottom of button.

  • Page 10: Water Button Assembly

    3-11 WATER BUTTON ASSMEBLY 3-14 ICEMAKER ASSEMBLY 1) Romove screws. 1) Loosen two screws as shown in the first picture. 2) Grasp the Button assembly and lift up. Button Lever 2) Disconnect the wire harness & ground screw replace theIcemaker assembly in the reverse order of removal. 3-12 DUCT DOOR REPLACEMENT 1) Pull up and out on the dispenser cover to remove.

  • Page 11: Auger Motor Cover

    3-15 AUGER MOTOR COVER 1) After removing the icemaker remove the (5) stainless screws holding the auger motor cover, shown in the picutres below. 2) Grip the bottom of motor cover assembly and pull out it. 3) Disconnect wire harness of motor cover assembly. There is a auger motor on the back, as shown in the picture.

  • Page 12: How To Remove A Door Ice Bin

    3-16 HOW TO REMOVE A DOOR ICE BIN 3-17 HOW TO INSERT A DOOR ICE BIN 1) Grip the handles, as shown in the picture. 1) Insert the Ice Bin, slightly tilting it to avoid touching the Icemaker. (especially, ice maker lever) 2) Lift the lower part slightly.

  • Page 13: How To Remove And Reinstall The Pullout Drawer

    3-18 HOW TO REMOVE AND REINSTALL THE PULLOUT DRAWER 3-19-1 Follow Steps to Remove Step 1) Open the freezer door. Step 2) Remove the lower basket. Step 3) Remove the two screws from the guide rails (one Step 4) Lift the freezer door up to unhook it from the rail from each side).
  • Page 14 3-18-2 Follow Steps to Reinstall Step 1) Reinstall the right side gear into the clip. Step 2) Insert the rail into the right side gear. Gears do not Step 3) Insert the rail into the left side gear, and insert the need to be perpendicular to each other.

  • Page 15: Fan And Fan Motor Disassembly

    3-19 FAN AND FAN MOTOR DISASSEMBLY 3-20 PULL OUT DRAWER METHOD To remove, lift basket up and pull out straight out. 1) Using a short screwdriver, loosen one SCREW in DRAIN PIPE ASSEMBLY and one connected to the MOTOR COVER. MOTOR COVER ®...

  • Page 16: Adjustment

    4. ADJUSTMENT 4-1 COMPRESSOR 4-2-3 PTC-Applied Circuit Diagram Starting Method for the Motor 4-1-1 Role The compressor intakes low temperature and low pressure gas from the evaporator of the refrigerator and compresses this gas to high-temperature and high-pressure gas. It then LFX21980** OVERLOAD PROTECTOR delivers the gas to the condenser.

  • Page 17: Olp (Overload Protector)

    4-3 OLP (OVERLOAD PROTECTOR) 4-4 TO REMOVE THE COVER PTC 4-3-1 Definition of OLP (1) OLP (OVERLOAD PROTECTOR) is attached to the Compressor and protects the Motor by opening the circuit to the Motor if the temperature rises and activating the bimetal spring in the OLP . (2) When high current flows to the Compressor motor, the Bimetal works by heating the heater inside the OLP , and the OLP protects the Motor by cutting off the...

  • Page 18: Circuit Diagram

    5. CIRCUIT DIAGRAM F-FAN ICING F-FAN C-FAN R-DOOR S/W BL BL F-LAMP FD-HEATER R-LAMPS STEPPING BL WH YL GY BK SB THERMOSTAT MOTOR FUSE-M (72°C) HEATER SHEAT F-DOOR S/W D-SENSOR R-SENSOR WH/ B K F-SENSOR WH/ R D BL/ W H SB YL WH/ B K CON102 WH/ B K...

  • Page 19: Troubleshooting

    6. TROUBLESHOOTING 6-1 COMPRESSOR AND ELECTRIC COMPONENTS (Rated Voltage Remove PTC-Starter Power Source. –10%)? from Compressor and measure voltage between T erminal C of Compressor and T erminal 5 or 6 of PTC. OLP disconnected? No Voltage. Replace OLP . Check connection condition.

  • Page 20: Other Electrical Components

    6-2 OTHER ELECTRICAL 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 21: Service Diagnosis Chart

    6-3 SERVICE DIAGNOSIS CHART COMPLAINT POINTS TO BE CHECKED REMEDY No Cooling. •Is the power cord unplugged from the outlet? • Plug into the outlet. • Check if the power switch is set to OFF . • Set the switch to ON. •...

  • Page 22: Refrigeration Cycle

    6-4 REFRIGERATION 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 ¥...
  • Page 23 6-4-1 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 24: Operation Principle And Repair Method Of Icemaker

    7. 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 with power on. Icemaking • Waits until water becomes ICE after starting the Mode icemaking operation.

  • Page 25: Ice Maker Functions

    7-2 ICE MAKER FUNCTIONS 7-2-1. Icemaking Mode 1. Icemaking refers to the freezing of supplied water in the ice tray. Complete freezing is assured by measuring the temperature of the Tray with Icemaking SENSOR. 2. Icemaking starts after completion of the water fill operation. 3.

  • Page 26: Defect Diagnosis Function

    7-2-4 Function TEST 1. This is a forced operation for TEST , Service, cleaning, etc. It is operated by pressing and holding the Fill Key for 3 seconds. 2. The test works only in the Icemaking Mode. It cannot be entered from the Harvest or Fill mode. 3.

  • Page 27: Description Of Function & Circuit Of Micom

    8. DESCRIPTION OF FUNCTION & CIRCUIT OF MICOM 8-1 FUNCTION 8-1-1 Function 1. When the appliance is plugged in, it is set to 37°F for Refrigerator and 0°F for freezer. You can adjust the Refrigerator and the Freezer control temperature by pressing the ADJUST button. 2.
  • Page 28 8-1-5 Ice Plus selection Please select this function for quick freezing. ¥ Function is repeat Ice Plus Icon whenever pressing Ice Plus button. ¥ Ice Plus function automatically turns off after a fixed time passes. 8-1-6 Dispenser use selection 1. Water ACTIVE WATER BUTTON PUSH * Water switch: Hold your cup in the dispenser for a few...
  • Page 29 8-1-11 Ice Plus 1. The purpose of this function is to intensify the cooling speed of freezer and to increase the amount of ice. 2. Whenever selection switch is pressed, selection/release, the Icon will turn ON or OFF . 3. If there is a power outage and the refrigerator is powered on again, Ice Plus will be canceled. 4.
  • Page 30 8-1-13 Defrosting (removing frost) 1. Defrosting starts each time theaccumulated COMPRESSOR running time is between 7:30 and 40 hours. This time is determinated by how often and how long the doors are opened. 2. For initial power on or for restoring power, defrosting starts when the compressor running time reaches 4 hours. 3.
  • Page 31 ERROR CODE on display panel ERROR CODE ITEM CONTENTS REMARKS FRZ TEMP REF TEMP Failure of Freezer Cut or short circuit wire. sensor Failure of Cut or short circuit wire. Refrigerator sensor Failure of defrost Cut or short circuit wire. Inspect Connecting sensor wires on each sensor...
  • Page 32 8-1-16 TEST Mode 1. The T est mode allows checking the PCB and the function of the product as well as finding out the defective part in case of an error. 2. The test mode is operated by pressing test button at main PCB controller. 3.

  • Page 33: Pcb Function

    8-2 PCB FUNCTION 8-2-1 Power Circuit 1. Power is supplied to the control board at pin1 and 3 of connector #1. - 33 -...
  • Page 34 8-2-2 Load / Fan & Open Door Detection Circuit 1. Load Drive Condition Check To measure outputs of the control board, check voltages between the pins for the following components: *LOAD DRIVE AREA ON MAIN PCB Circuit Circuit Pin Number Pin Number Pin Number Pin Number...
  • Page 35 To measure putput of the fans on the control board check voltages between the pins for the following components: OUTPUT VOLTAGE PIN NUMBER PIN NUMBER MOTOR ON MOTOR OFF Freezing compartment fan Con4 Pin1 Con4 Pin2 13 VDC - 15 VDC 2 VDC or less Machine compartment fan Con4 Pin7...
  • Page 36 8-2-3 Temperature Sensor Circuit “LOCATED ON DISPLAY PCB” RESISTANCE OF FREEZER/Icing RESISTANCE OF REFRIGERATOR & TEMPERATURE SENSOR DEFROST SENSOR & ROOM SENSOR - 20 ºC (-4 °F) 22.3 K? 77 K? - 15 °C (5°F) 16.9 K ? 60 K? - 10 °C (14 °F) 13.0 K? 47.3 K?
  • Page 37 8-2-4 Refrigeration Compartment Stepping Motor Damper Circuit A reversible DC motor is used to open and close the damper. T o open the damper, push test button once. T o close the damper, push test button twice. To see connector 6 picture, refer to page 37. 8-2-5 Dispenser Drive Circuit Circuit Pin Number...

  • Page 38: Troubleshooting

    8-3 TROUBLESHOOTING PROBLEM INDICATED BY CHECK CHECKING METHOD CAUSE SOLUTION POWER 1. The whole 1. FREEZER/ Check if POWER SOURCE is Replace Main PWB SOURCE is REFRIGERATOR. FREEZER/REFRIGERA poor. poor. TOR DOOR IS OPEN and check display. 2. If LAMP is dim. Check visually.
  • Page 39 PROBLEM INDICATED BY CHECK CHECKING METHOD CAUSE SOLUTION COOLING is 1. If FREEZER Check is FREEZER Make sure the DOOR poor. REFRIGERATOR TEMPERATURE is TEMPERATURE is too isattached. TEMPERATURE normal. low. is too low. 2. If amount of cool air Make sure that the FAN MOTOR is poor.

  • Page 40: Main Pwb Assembly And Parts List

    8-4 MAIN PWB ASSEMBLY AND PARTS LIST 8-4-1 Main PWB Assembly - 40 -...
  • Page 41 8-4-2 Dispenser Drive PWB Assembly - 41 -...
  • Page 42 #EV# 9. EXPLODED VIEW & REPLACEMENT PART LIST CASE PARTS Caution: Use the part number to order part, not the position number. 603B 281A 402A 611D 611B 103B 611C 103A 271C 410A 282E 207C 409D 611A 104E 501F 402A 271A 503D 903D 282F...

  • Page 43: Exploded View And Replacement Part List

    #EV# FREEZER PARTS Caution: Use the part number to order part, not the position number. 136B 131A 145C 248E 248F 237C 145F 136A - 43 -...
  • Page 44 #EV# REFRIGERATOR PARTS Caution: Use the part number to order part, not the position number. 143E 140D 140B 140E 143E 140D 140B 143E 140E 140D 140B 140E 143F 142D 140B 142E 128A 103E 170A 128B 167B 103E 154A 151C 151A 151A 305D 155B...
  • Page 45 #EV# DOOR PARTS 241A Caution: Use the part number to order part, not the position number. 241C 241B 230B 230A 231B 233B 233C 233D 233A 231A 233E 233F 212G 233H 233G 241D 237A 212A 212A 241G 212J 241D 212J 147A 147B 286A 286A...
  • Page 46 #EV# DISPENSER PARTS Caution: Use the part number to order part, not the position number. 276A 275A 405H 279G 279H 500E 279B 500D 501D 279J 402C 278D 281G 279D 281F 500C 279E 501B 279A - 46 -...
  • Page 47 #EV# ICE MAKER & ICE BANK PARTS Caution: Use the part number to order part, not the position number. 606A 630J 600A 600B 630F 630B 630C 630A 614A 630K 630M 630H 630E 630N 630D 630G 630L - 47 -...
  • Page 48 #EV# VALVE & WATER PARTS Caution: Use the part number to order part, not the position number. 617A 617B 627A 616K 623B 616A 625A 623C 616D 603C 616H - 48 -...
  • Page 49 #EV# LFX23961ST LOC NO PART NO DESCRIPTION LOC NO PART NO DESCRIPTION 103A 3650JJ2003H Handle,Rear 304A 3551JJ2008B Cover Assembly,Machinery(Rear) 103B 3650JJ2003D Handle,Rear 305B 4580JJ3001A Roller 103C 3551JJ1015H Cover Assembly,Lower 305B 4580JJ3001A Roller 103E 5218JJ3001A Rail,Slide 305C 4J04238A Pin,Common 103E 5218JJ3001A Rail,Slide 305C 4J04238A...
  • Page 50 #EV# LFX23961SW LOC NO PART NO DESCRIPTION LOC NO PART NO DESCRIPTION 103A 3650JJ2003E Handle,Rear 305B 4580JJ3001A Roller 103B 3650JJ2003A Handle,Rear 305C 4J04238A Pin,Common 103C 3551JJ1015B Cover Assembly,Lower 305C 4J04238A Pin,Common 103E 5218JJ3001A Rail,Slide 305D 4580JA3042A Roller 103E 5218JJ3001A Rail,Slide 307A TCA31748001 Compressor,Set Assembly 104E...
  • Page 51 MARCH, 2008...

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