LG LFX25961 Series Service Manual
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LG LFX25961 Series Service Manual

Refrigerator
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See also: User Manual and Installation Instructions
REFRIGERATOR
SERVICE MANUAL
CAUTION
BEFORE SERVICING THE UNIT,
READ THE SAFETY PRECAUTIONS IN THIS MANUAL.
MODEL : LFX25961**
COLOR : STAINLESS
ILLUMINA
WESTERN BLACK (SB)
SUPER WHITE
(ST)
(AV)
(SW)

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Summary of Contents for LG LFX25961 Series

  • Page 1 REFRIGERATOR SERVICE MANUAL CAUTION BEFORE SERVICING THE UNIT, READ THE SAFETY PRECAUTIONS IN THIS MANUAL. COLOR : STAINLESS (ST) ILLUMINA (AV) WESTERN BLACK (SB) MODEL : LFX25961** SUPER WHITE (SW)

  • Page 2: Table Of Contents

    CONTENTS SAFETY PRECAUTIONS ............................... 2 1. SPECIFICATIONS ................................3 2. PARTS IDENTIFICATION ..............................4 3. DISASSEMBLY ................................5-14 REMOVING AND REPLACING REFRIGERATOR DOORS ..................... 5 DOOR ..................................... 6-7 DOOR ALIGNMENT ................................7 FAN AND FAN MOTOR(EVAPORATOR) ......................... 7 DEFROST CONTROL ASSEMBLY ........................... 8 LAMP ....................................

  • Page 3: Specifications

    HANDLE TYPE 60W (1EA) INNER CASE ABS Resin INSULATION Polyurethane Foam DIMENSIONS Description LFX25961**/02 Depth w/ Handles 34 1/4 in. Depth w/o Handles 31 3/4 in. Depth w/o Door 27 7/8 in. Depth (Total with Door Open) 46 1 /2 in.

  • Page 4: Parts Identification

    2. PARTS IDENTIFICATION ADJUSTABLE REFRIGERATOR SHELVING The refrigerator compartment shelves are adjustable to allow flexibility for storage needs. MODULAR DOOR BINS Three interchangeable bins can be arranged to suit your storage needs. REMOVABLE ICE STORAGE BIN The ice storage bin can be removed to fill ice buckets, coolers,or pitchers.

  • Page 5: Disassembly

    3. DISASSEMBLY 3-1 REMOVING AND REPLACING REFRIGERATOR DOORS Removing Refrigerator Door CAUTION : Before you begin, unplug the refrigerator. Remove food and bins from doors. Left Door -FIG. 2 1. Disconnect water supply tube by pushing back on the disconnect ring (4).-FIG. 1 2.

  • Page 6: Door

    3-2 DOOR Door Gasket Replacement 1. Insert gasket bracket clips Removing Refrigerator Door 1) Insert gasket bracket edge beneath door frame edge. 1. Remove door frame cover 2) Turn upper gasket bracket spring so that the spring Starting at top of cover and working down, snap cover ends are in the door channel.

  • Page 7: Door Alignment

    2) Press gasket into channels on the three remaining sides 3-4 DOOR ALIGNMENT of door. If the space between your doors is uneven, follow the instructions below to align the doors: 1. With one hand, lift up the door you want to raise at middle hinge.

  • Page 8: Defrost Control Assembly

    * Ice Fan Scroll Assembly Replacement 3-7 LAMP 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 all screws.

  • Page 9: Multi Duct

    3-8 MULTI DUCT 2) Remove display frame assembly by making a gap 1. Remove the upper and between a display frame lower Caps by using a assembly and door with a flat screwdriver, and flat blade screwdriver and remove 2 screws. (Figure pulling it forward.

  • Page 10: Sub Pwb For Dispenser

    3-13 SUB PWB FOR WORKING DISPENSER 3-15 ICE CORNER DOOR REPLACEMENT 1) Loosen the screw on the sub PWB. 1) Loosen the front screw as shown in the picture. 2) Lift up the hinge with one hand. 3) Pull out the Ice Corner Door with the other hand. hinge 2) Pull the sub PWB down.

  • Page 11: Auger Motor Cover

    3-16 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

    3-17 HOW TO REMOVE A DOOR ICE BIN 3-18 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

    3-19 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 3-19-2 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: Warwe Valve Disassembly Method

    3-20 WATER VALVE DISASSEMBLY METHOD 3-21 FAN AND FAN MOTOR DISASSEMBLY METHOD 1) Turn off the water. Then separate the water line from the 1) Using a short screwdriver, loosen one SCREW in DRAIN valve. PIPE ASSEMBLY and one connected to the MOTOR COVER.

  • Page 16: Pull Out Drawer

    3-22 PULL OUT DRAWER To remove the drawer, push the tabs located on the front inside surface of each rail. Next, gently lift the rear left and right sides of the drawer and pull it out. To reinstall, pull out both rails to full extension. Insert the end of rib in the bracket at left and right. Making sure that the guides at the front are lined up properly, gently push down on both sides.

  • Page 17: 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 delivers the gas to the condenser.

  • Page 18: Olp(Overload Protector)

    4-3 OLP (OVERLOAD PROTECTOR) 4-4 TO REMOVE THE COVER PTC 4-5-1 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 current...

  • Page 19: Circuit Diagram

    5. CIRCUIT DIAGRAM - 19 -...

  • Page 20: Troubleshooting

    6. TROUBLESHOOTING 6-1 COMPRESSOR AND ELECTRIC COMPONENTS Remove PTC-Starter (Rated Voltage Power source. from Compressor and ±10%)? measure voltage between Terminal C of Compressor and Terminal 5 or 6 of PTC. No Voltage. OLP disconnected? Replace OLP. Check connection condition. Reconnect.
  • Page 21 6-2 OTHER ELECTRICAL COMPONENTS Not cooling at all Compressor doesn't Check for open short or Cause run. incorrect resistance readings in the following components a. Starting devices Short, open, or broken. b. OLP Poor contact or shorted. c. Compressor coil Coil open or shorted.
  • Page 22 6-3 SERVICE DIAGNOSIS CHART COMPLAINT POINTS TO BE CHECKED REMEDY • Is the power cord unplugged from the outlet? • Plug into the outlet. No Cooling. • Check if the power switch is set to OFF. • Set the switch to ON. •...

  • Page 23: Troubleshooting

    6-4 REFRIGERATION CYCLE Troubleshooting Chart TEMPERATURE STATE OF STATE OF THE OF THE CAUSE REMARKS THE UNIT EVAPORATOR COMPRESSOR PARTIAL Freezer Low flowing sound of A little higher than • Refrigerant level is low due LEAKAGE compartment and Refrigerant is heard ambient to a leak.
  • Page 24 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 25: 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 • Adjusts EJECTOR to Start Position with power on. Start Position Icemaking • Waits until water becomes ICE after starting the Mode icemaking operation.
  • Page 26 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 27 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 28: Description Of Function & Circuits Of Micon

    8. DESCRIPTION OF FUNCTION & CIRCUIT OF MICOM 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 29 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 You can select water or ice. Pressing * Select water, crushed ice, or ice cubes by cycling through the Switch...
  • Page 30 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 LED 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 31 8-1-14 Defrosting (removing frost) 1. Defrosting starts each time the COMPRESSOR running time reaches 7 hours. 2. For initial power on or for restoring power, defrosting starts when the compressor running time reaches 4 hours. 3. Defrosting stops if the sensor temperature reaches 46.4°F(8°C) or more. If the sensor doesn’t reach 46.4°F(8°C) in 2 hours, the defrost mode is malfunctioning.
  • Page 32 ERROR CODE on display panel Error Display Error Detection Error Generation Factors Remark Freezer Ref. Category Temperature Temperature Normality None Normal operation of Display Freezer Sensor Short or Disconnection of Error Freezer Sensor Refrigerator Short or Disconnection of Sensor Error Refrigerator Sensor Each Sensor have to check disconnection...
  • Page 33 8-1-16 TEST Mode 1. The Test 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 two buttons at Display panel. 3.
  • Page 34 8-1-17 Display Mode 1. Press the REFRIGERATOR and ICE PLUS buttons simultaneously and hold them for 5 seconds until the ding sounds. 2. To release from the display mode, press the REFRIGERATOR and ICE PLUS buttons simultaneously and hold them for 5 seconds until the ding sounds.
  • Page 35 8-2 PCB FUNCTION 8-2-1 Power Circuit The secondary part of the TRANSFORMER is composed of the power supply for the display, the BLDC FAN Motor drive (15.5 V), the relay drive (12 Vdc) and the MICOM and IC (5 Vdc). The voltage for each part is as follows : VA1 is a part for preventing over voltage and noise.
  • Page 36 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: Circuit Pin Number Pin Number Output Voltage I/Maker Pilot Valve Con3 Pin3 Con3 Pin2 115 VAC...
  • Page 37 2-3. Machine compartment fan Pin8 & 9 of con4 MOTOR OFF 2V or less MOTOR ON 13V~15V 2-4. Icing compartment fan Pin5 & 6 of con4 MOTOR OFF 2V or less MOTOR ON 13V~15V - 37 -...
  • Page 38 3. Open Door Detection Circuit Check Measurement Pin 11 & 12 of con4 Ref.Door Freezer/ Location Pin 5 & 6 of con6 Fre.Door Refrigerator Door Closed Open 8-2-3 Temperature Sensor Circuit The upper circuit reads refrigerator temperature, freezer temperature, Icing sensor temperature and defrost sensor temperature for defrosting and the indoor temperature for compensating for the surrounding temperature into MICOM.
  • Page 39 8-2-3 RESISTANCE SPECIFICATION OF SENSOR RESISTANCE OF FREEZER/ICING RESISTANCE OF REFRIGERATOR & TEMPERATURE SENSOR DEFROST SENSOR & ROOM SENSOR - 20°C 22.3 - 15°C 16.9 - 10°C 13.0 47.3 - 5°C 10.1 38.4 0°C + 5°C 24.1 + 10°C 19.5 + 15°C 15.9 + 20°C...
  • Page 40 8-2-4 Refrigeration Compartment Stepping Motor Damper Circuit A reversible DC motor is used to open and close the damper. To open the damper, push test button once. To close the damper, push test button twice. 8-2-5 Dispenser Drive Circuit Circuit Pin Number Pin Number Output Voltage...
  • Page 41 8-2-6 LED in Refrigerator/Freezer room (Apply for LED Model) CON6 Circuit Pin Number Pin Number Output Voltage LED Module Con6 Pin14 Con6 Pin15 12VDC - 41 -...
  • Page 42 8-3 TROUBLESHOOTING CHECKING SOLUTION PROBLEM INDICATED BY CAUSE CHECK METHOD POWER 1. The whole 1. FREEZER/ Check if FREEZER/ POWER SOURCE Replace Main PWB SOURCE is REFRIGERAT- REFRIGERATOR is poor. poor. DOOR IS OPEN and check display. 2. If LAMP is dim. Check visually. Applied voltage Replace Main PWB 2.
  • Page 43 CHECKING SOLUTION PROBLEM INDICATED BY CAUSE CHECK METHOD COOLING is 1. If FREEZER Check is FREEZER Make sure the DOOR poor. REFRIGERATOR TEMPERATU- TEMPERATURE is isattached. TEMPERATURE RE is normal. too low. is too low. 2. If amount of Make sure that the FAN MOTOR is Replace FAN cool air from...
  • Page 44 8-4 MAIN PWB ASSEMBLY AND PARTS LIST 8-4-1 Main PWB Assembly - 44 -...
  • Page 45 8-4-2 Dispenser Drive PWB Assembly - 45 -...

  • Page 46: Exploded View & Replacement Parts List

    9. EXPLODED VIEW & REPLACEMENT PARTS LIST CASE PARTS CAUTION: Use the part number to order part, not the position number. 607A 603C 603B 207B 626A 402A 624D 103B 103A 624C 271B 207A 624A 409D 610D 406D 501F 402A 120A 282G 503D 271D...
  • Page 47 FREEZER PARTS CAUTION: Use the part number to order part, not the position number. 250C 250D 145C 250E 250D 250C 136B 145G 145J 131A 145K 145F 145M 145J 145H 237C 136A...
  • Page 48 REFRIGERATOR PARTS CAUTION: Use the part number to order part, not the position number. 141B 141A 141E 141B 141A 141C 141E 141B 141A 141E 141C 141B 141A 141C 141E 161C 141D 161B 141C 154A 151B 151A 146E 162B 145E 161A 145D 162A...

  • Page 49: Door Parts

    DOOR PARTS CAUTION: Use the part number to order part, not the position number. 241A 230B 241C 241B 230A 231B 233B 233C 231A 233D 233A 234D 234C 212G 234A 234B 241D 241D 241G 243D 243C 243A 243B 241E 241H 262C 262C 244A 244A...
  • Page 50 DISPENSER PARTS CAUTION: Use the part number to order part, not the position number. 278A 278C 402C 278B 276A 275A 278F 278D 405A 500B 276B 279D 280F 280D 279C 279B 280A 280E 280C 280B 281A 279A...
  • Page 51 ICE & MAKER PARTS CAUTION: Use the part number to order part, not the position number. 617A 625A 616G 616D 616G 623B 616F 616J 623B 616J 627B 603C 616D 627A 619A 619E 603B...
  • Page 52 ICE BANK PARTS CAUTION: Use the part number to order part, not the position number. 612A 600B 630J 600A 611A 630F 630B 630C 630A 630K 630M 630H 606A 630E 614A 630N 630D 630G 630L...
  • Page 53 P/No. MFL62259503 JAN., 2010 Printed in Korea...

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