LG LFX25960SB Service Manual
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LG LFX25960SB Service Manual

LG LFX25960SB Service Manual

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REFRIGERATOR
SERVICE MANUAL
CAUTION
BEFORE SERVICING THE UNIT,
READ THE SAFETY PRECAUTIONS IN THIS MANUAL.
MODEL: LFX25960ST
LFX25960SW LFX21960SW
LFX25960SB
LFX25960TT
LFX21960ST
LFX21960SB
LFX21960TT
COLOR: TITANIUM
WESTERN BLACK
SUPER WHITE
STAINLESS

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  • Page 1 All manuals and user guides at all-guides.com REFRIGERATOR SERVICE MANUAL CAUTION BEFORE SERVICING THE UNIT, READ THE SAFETY PRECAUTIONS IN THIS MANUAL. MODEL: LFX25960ST LFX21960ST COLOR: TITANIUM LFX25960SW LFX21960SW WESTERN BLACK LFX25960SB LFX21960SB SUPER WHITE LFX25960TT LFX21960TT STAINLESS...

  • Page 2: Table Of Contents

    All manuals and user guides at all-guides.com CONTENTS SAFETY PRECAUTIONS ............................... 2 1. SPECIFICATIONS................................3 2. PARTS IDENTIFICATION ..............................4 3. DISASSEMBLY................................5-13 REMOVING AND REPLACING REFRIGERATOR DOORS ....................5 DOOR ....................................6-7 TO REMOVE THE DISPENSER ............................7 DOOR ALIGNMENT ................................7 FAN AND FAN MOTOR(Evaporator) ..........................

  • Page 3: Specifications

    All manuals and user guides at all-guides.com 1. SPECIFICATIONS 21 cu. ft. / 25 cu. ft. 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...

  • Page 4: Parts Identification

    All manuals and user guides at all-guides.com 2. PARTS IDENTIFICATION Refrigerator Light Tilt-Out Door Basket Ice Bank Filter (Inside) Durabase Ice Door Modular Door Bins Divider Refrigerator Shelves Ice Bin Supra Fresh Crisper with Water Tank Cover Tilt-Out Compartment Snack Pan Ice Room Egg Box (Ice Maker and Ice Bank)

  • Page 5: Disassembly

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

  • Page 6: Door

    All manuals and user guides at all-guides.com 3-2 DOOR Door Gasket Replacement 1. Insert gasket bracket clips Door Gasket Removal 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: To Remove The Dispenser

    All manuals and user guides at all-guides.com 2) Press gasket into channels on the three remaining 3-3 DOOR ALIGNMENT sides 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: Ice Fan Scroll Assembly Replacement

    All manuals and user guides at all-guides.com * Ice Fan Scroll Assembly Replacement 3-6 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 2 screws Figure 14...

  • Page 9: Multi Duct

    All manuals and user guides at all-guides.com 3-8 MULTI DUCT 2) Remove display frame assembly by making a gap between a display frame 1. Remove the upper and assembly and door with a lower Caps by using a flat flat blade screwdriver and screwdriver, and remove 2 screws.

  • Page 10: Sub Pwb For Dispenser, Duct Door Replacement, Ice Corner Door Replacement, Ice Maker Assembly

    All manuals and user guides at all-guides.com 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.

  • Page 11: Auger Motor Cover, Auger Motor Replacement

    All manuals and user guides at all-guides.com 3-17 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.

  • Page 12: Door Ice Bin

    All manuals and user guides at all-guides.com 3-18 HOW TO REMOVE A DOOR ICE BIN 3-19 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.

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

    All manuals and user guides at all-guides.com 3-20 HOW TO REMOVE AND REINSTALL THE PULLOUT DRAWER 3-20-1 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 All manuals and user guides at all-guides.com 3-20-2 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 All manuals and user guides at all-guides.com 3-20. WATER VALVE DISASSEMBLY METHOD 3-21. FAN AND FAN MOTOR DISASSEMBLY METHOD 1) Using a short screwdriver, loosen one SCREW in 1) Turn off the water. Then separate the water line from the DRAIN PIPE ASSEMBLY and one connected to the valve.
  • Page 16 All manuals and user guides at all-guides.com 3-22 PULL OUT DRAWER o separate the drawer, push the front left and right hooks in direction to pull up and remove. Then gently lift the gear part of rear left and right side of the drawer and pull it out in direction.

  • Page 17: Adjustment

    All manuals and user guides at all-guides.com 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 LFX21960** OVERLOAD PROTECTOR delivers the gas to the condenser.

  • Page 18: Olp(Overload Protector)

    All manuals and user guides at all-guides.com 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.

  • Page 19: Circuit Diagram

    All manuals and user guides at all-guides.com 5. CIRCUIT DIAGRAM - 19 -...

  • Page 20: Troubleshooting

    All manuals and user guides at all-guides.com 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.

  • Page 21: Other Electrical Components

    All manuals and user guides at all-guides.com 6-2 OTHER ELECTRICAL COMPONENTS M 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.

  • Page 22: Service Diagnosis Chart

    All manuals and user guides at all-guides.com 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. •...

  • Page 23: Refrigeration Cycle

    All manuals and user guides at all-guides.com 6-4 REFRIGERATION CYCLE M 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...
  • Page 24 All manuals and user guides at all-guides.com 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 None Partial Pattern? Equalization Equalization Test Test...

  • Page 25: Operation Principle & Repair Method Of Icemaker

    All manuals and user guides at all-guides.com 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 26 All manuals and user guides at all-guides.com 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.
  • Page 27 All manuals and user guides at all-guides.com 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 & Error Codes

    All manuals and user guides at all-guides.com 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 29 All manuals and user guides at all-guides.com 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.
  • Page 30 All manuals and user guides at all-guides.com 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.
  • Page 31 All manuals and user guides at all-guides.com 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.
  • Page 32 All manuals and user guides at all-guides.com ERROR CODE on display panel Error Display Error Detection Error Generation Factors Remark Freezer Ref. Category Temperature Temperature Normality Normal operation of None Display Short or Disconnection Freezer Sensor Error of Freezer Sensor Short or Disconnection Refrigerator of Refrigerator Sensor...
  • Page 33 All manuals and user guides at all-guides.com 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 All manuals and user guides at all-guides.com 8-2 PCB FUNCTION 8-2-1 Power Circuit 1. Power is supplied to the control board at pin1 and 3 of connector #1. - 34 -...
  • Page 35 All manuals and user guides at all-guides.com 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...
  • Page 36 All manuals and user guides at all-guides.com 2-2. Machine compartment fan Pin7 & 8 of con4 MOTOR OFF 2V or less MOTOR ON 13V~15V 2-3. Icing compartment fan Pin4 & 5 of con4 MOTOR OFF 2V or less MOTOR ON 13V~15V - 36 -...
  • Page 37 All manuals and user guides at all-guides.com 3. Open Door Detection Circuit Check Measurement Pin 4 & 5 of con4 Ref.Door Location Freezer/ Pin 5 & 6 of con5 Fre.Door Refrigerator Door Closed Open 8-2-3 Temperature Sensor Circuit RESISTANCE OF FREEZER/Icing RESISTANCE OF REFRIGERATOR &...
  • Page 38 All manuals and user guides at all-guides.com 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...
  • Page 39 All manuals and user guides at all-guides.com 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.
  • Page 40 All manuals and user guides at all-guides.com 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.
  • Page 41 All manuals and user guides at all-guides.com 8-4 MAIN PWB ASSEMBLY AND PARTS LIST 8-4-1 Main PWB Assembly Connector7 Connector6 Connector5 Connector4 Test Switch Connector1 Connector2 Connector3 - 41 -...
  • Page 42 All manuals and user guides at all-guides.com 8-4-2 Dispenser Drive PWB Assembly Connector1 Connector2 Connector4 Connector3 - 42 -...

  • Page 43: Exploded View & Replacement Parts List

    All manuals and user guides at all-guides.com 9. EXPLODED VIEW & REPLACEMENT PARTS LIST CASE PARTS CAUTION: Use the part number to order part, not the position number. 607A 207B 626A 624D 402A 103B 271C 271B 624C 103A 410A 207A 207C 624A 409D...
  • Page 44 All manuals and user guides at all-guides.com FREEZER PARTS CAUTION: Use the part number to order part, not the position number. 250C 250D 145C 250A 250D 250C 136B 131A 145F 237C 136A - 44 -...
  • Page 45 All manuals and user guides at all-guides.com REFRIGERATOR PARTS CAUTION: Use the part number to order part, not the position number. 141B 141A 141B 141C 141A 141B 141A 141C 141B 140A 141C 140C 140B 140D 161E 141D 161C 161A 154B 154A 167B 161D...
  • Page 46 All manuals and user guides at all-guides.com DOOR PARTS CAUTION: Use the part number to order part, not the position number. 241A 241C 241B 230B 230A 231B 233B 233C 233D 233A 231A 234A 234B 212G 147C 147B 147A 241D 146A 241E 237A 262C...
  • Page 47 All manuals and user guides at all-guides.com DISPENSER PARTS CAUTION: Use the part number to order part, not the position number. 278A 278C 402C 278B 276A 275A 278F 405A 278D 501A 276B 279D 279E 279B 280B 280C 281A 279A - 47 -...
  • Page 48 All manuals and user guides at all-guides.com ICE & MAKER PARTS CAUTION: Use the part number to order part, not the position number. 617A 625A 616G 616D 616G 623B 616F 616H 623B 616H 627A 603A 616D 619A 603B - 48 -...
  • Page 49 All manuals and user guides at all-guides.com ICE BANK PARTS CAUTION: Use the part number to order part, not the position number. 606A 630J 600A 611A 630F 630B 630C 630A 630K 630M 630H 630E 630N 630D 630G 630L - 49 -...
  • Page 50 All manuals and user guides at all-guides.com P/No. 3828JL8795A APR., 2006 Printed in Korea...

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