LG LRSC26925SW Service Manual
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LG LRSC26925SW Service Manual

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See also: Owner's Manual , User Manual
REFRIGERATOR
SERVICE MANUAL
CAUTION
PLEASE READ CAREFULLY THE SAFETY PRECAUTIONS OF THIS MANUAL
BEFORE CHECKING OR OPERATING THE REFRIGERATOR.
LRSC26925SW
LRSC26925TT
LRSC26923SW
LRSC26923TT
http://biz.lgservice.com
LRSC26915SW
LRSC26915TT
LRSC26912SW
LRSC26912TT
LRSC26940SW
LRSC26940SB
LRSC26940TT
LRSC26940ST
LRSC26941SW
LRSC26941SB
LRSC26941ST

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Summary of Contents for LG LRSC26925SW

  • Page 1 REFRIGERATOR SERVICE MANUAL CAUTION PLEASE READ CAREFULLY THE SAFETY PRECAUTIONS OF THIS MANUAL BEFORE CHECKING OR OPERATING THE REFRIGERATOR. LRSC26915SW LRSC26915TT LRSC26912SW LRSC26912TT LRSC26940SW LRSC26940SB LRSC26940TT LRSC26925SW LRSC26940ST LRSC26925TT LRSC26941SW LRSC26923SW LRSC26941SB LRSC26923TT LRSC26941ST...

  • Page 2: Table Of Contents

    CONTENTS WARNINGS AND PRECAUTIONS FOR SAFETY ........................ 3 SPECIFICATIONS................................... 4 PARTS IDENTIFICATION ............................... 7 HOW TO INSTALL THE REFRIGERATOR .......................... 10 HOW TO ADJUST DOOR HEIGHT............................ 10 FILTER....................................11 HOW TO CONTROL THE ICEMAKER WATER SUPPLY....................12 MICOM FUNCTION ................................14 EXPLANATION OF MICOM CIRCUIT ..........................

  • Page 3: Warnings And Precautions For Safety

    WARNINGS AND PRECAUTIONS FOR SAFETY Please observe the following safety precautions to use the 8. Do not fray, damage, run over, kink, bend, pull out, or refrigerator safely and correctly and to prevent accident or twist the power cord. injury when servicing. 9.

  • Page 4: Specifications

    SPECIFICATIONS 1. Ref No. : GR-L267BV(T,S)PA ITEMS SPECIFICATIONS ITEMS SPECIFICATIONS DIMENSIONS 1771 mm DRIER MOLECULAR SIEVE XH-7 in.) CAPILLARY TUBE ID Ø0.83 NET WEIGHT 149 kg (328.5 lbs.) FIRST DEFROST 4 - 5 Hours COOLING SYSTEM Fan Cooling DEFROST CYCLE 13 - 15 Hours TEMPERATURE CONTROL Micom Control...
  • Page 5 SPECIFICATIONS 2. Ref No. : GR-L267BV(T)RA ITEMS SPECIFICATIONS ITEMS SPECIFICATIONS DIMENSIONS 1771 mm DRIER MOLECULAR SIEVE XH-7 in.) CAPILLARY TUBE ID Ø0.83 NET WEIGHT 149 kg (328.5 lbs.) FIRST DEFROST 4 - 5 Hours COOLING SYSTEM Fan Cooling DEFROST CYCLE 13 - 15 Hours TEMPERATURE CONTROL Micom Control...
  • Page 6 SPECIFICATIONS 3. Ref No. : GR-L267BV(T)R ITEMS SPECIFICATIONS ITEMS SPECIFICATIONS DIMENSIONS 1771 mm DRIER MOLECULAR SIEVE XH-7 in.) CAPILLARY TUBE ID Ø0.83 NET WEIGHT 149 kg (328.5 lbs.) FIRST DEFROST 4 - 5 Hours COOLING SYSTEM Fan Cooling DEFROST CYCLE 13 - 15 Hours TEMPERATURE CONTROL Micom Control...

  • Page 7: Parts Identification

    PARTS IDENTIFICATION 1. Ref No. : GR-L267BV(T,S)PA PWB Cover Frame Display Water Tubes Dispenser Lamp Ice & Water Dispenser Button Freezer Refrigerator Water Filter Compartment Compartment Dairy Product Corner Door Rack Lamp Shelf Automatic Grab and Go Icemaker Wine Holder Lamp Egg Box Shelf...
  • Page 8 PARTS IDENTIFICATION 2. Ref No. : GR-L267BV(T)RA PWB Cover Frame Display Water Tubes Dispenser Lamp Ice & Water Dispenser Button Freezer Refrigerator Water Filter Compartment Compartment Dairy Product Corner Door Rack Lamp Shelf Automatic Door Rack Icemaker Wine Holder Lamp Egg Box Shelf Snack Drawer...
  • Page 9 PARTS IDENTIFICATION 3. Ref No. : GR-L267BV(T)R PWB Cover Frame Display Water Tubes Dispenser Lamp Ice & Water Dispenser Button Freezer Refrigerator Water Filter Compartment Compartment Dairy Product Corner Door Rack Lamp Shelf Automatic Icemaker Door Rack Lamp Egg Box Shelf Snack Drawer Bottle Guide...

  • Page 10: How To Install The Refrigerator

    HOW TO INSTALL REFRIGERATOR 1. How to Adjust Door Height of Refrigerator I Make the refrigerator level first. (If the refrigerator is not installed on a flat floor, the height of freezer and refrigerator door may not be the same.) 1.

  • Page 11: Filter

    HOW TO INSTALL REFRIGERATOR 2. Filter 2. Replace with a new cartridge. Replace the filter when the indicator light comes on or the Take the new cartridge out of its packaging and remove performance of the icemker or water dispenser decreases protective cover from the o-rings.

  • Page 12: How To Control The Icemaker Water Supply

    HOW TO INSTALL REFRIGERATOR 3. How to Control the Amount of Water Supplied to Icemaker. 3-1. Confirm the amount of water supplied to the icemaker. 1. Pull out the ice bin shelf in the upper part of the freezer compartment. Caution : •...
  • Page 13 HOW TO INSTALL REFRIGERATOR 3-2. Control the amount of water supplied to the icemaker. Caution : • Please unplug the power cord from the wall outlet and wait for more than three minutes before disconnecting PWB cover as 310V is applied in the control panel. (+) Driver 1.

  • Page 14: Micom Function

    MICOM FUNCTION 1. Monitor Panel 1-1. GR-L267BV(T)RA, GR-L267BV(T, S)PA EXPRESS FILTER DIGITAL CONTROL CUBE (EXPRESS) FILTER RESET ROOM TEMPERATURE HOLD 3SECS WATER LOCK 3 SECS FRZ TEMP REF TEMP CRUSH (JET) DISPENSER & BUTTON EXPRESS/JET FRZ DISPENSER FREEZER REFRIGERATOR FILTER/LIGHT LOCK Express Freezer/Jet Freezer Dispenser and button...
  • Page 15 MICOM FUNCTION 1-3. Display Second Function EXPRESS FILTER CUBE DIGITAL CONTROL (EXPRESS) FILTER RESET HOLD 3SECS ROOM TEMPERATURE WATER LOCK 3 SECS FRZ TEMP REF TEMP CRUSH (JET) DISPENSER & BUTTON EXPRESS/JET FRZ DISPENSER FREEZER REFRIGERATOR FILTER/LIGHT LOCK Buzzer sound mute Mode Exhibition Mode Display Power...
  • Page 16 MICOM FUNCTION 2. Description of Function 2-1-1. Function of Temperature Selection Division Power Initially On 1st Press 2st Press 3th Press 4th Press Setting temperature Temperature Medium Medium Max Medium Min Control Freezer Control -2 °F -5 °F -8 °F 7 °F 1 °F Refrigeration...
  • Page 17 MICOM FUNCTION 2-1-3. Lock function (dispenser and display button lock) 1. In power application of refrigerator, the “LOCK” text is turned off at the right side of lock graphic of display with the lock replease status. 2. If desiring to lock the dislay the dispenser and control panel, push on the LOCK button more than 3 seconds. LOCK text is turned on at the right side of lock graphic of display with lock status.
  • Page 18 MICOM FUNCTION 2-2. Dispenser use selection You can select water or ice. DISPENSER ❉ Please select water, slice ice and square ice by pressing button as you DISPENSER CUBE desire. ❉ Please press the push button lightly by catching and pushing in cup. WATER •...
  • Page 19 MICOM FUNCTION 2-5. Express freezing 1. Express freezing is function to improve cooling speed of the freezing room by consecutively operating compressors and freezing room fan. 2. Express freezing is released if power failure occurs and then returns to the original status. 3.
  • Page 20 MICOM FUNCTION 2-7. OptiChill Function (GR-L267BV(T,S)PA Model) 1. The OptiChill is positioned at the bottom of fresh food room separately and allow a user to select and adjust a desired temperature according to kinds of food such as meat, fish, vegetables and fruits and so on. The selected temperature to any kinds of food let user to keep their food longer.
  • Page 21 MICOM FUNCTION 2-8. Control of variable type of freezing fan 1. To increase cooling speed and load response speed, MICOM variably controls freezing room fan motor at the high speed of RPM and standard RPM. 2. MICOM only operates in the input of initial power or express freezing operation or load response operation for the high speed of RPM and operates in the standard RPM in other general operation.
  • Page 22 MICOM FUNCTION 2-12. Ringing of compulsory operation, compulsory frost removal buzzer 1. If pressing the test button in the main PCB, “Phi ~” sound rings. 2. In selecting compulsory operation, alarm sound is repeated and completed in the cycle of On for 0.2 second and Off for 1.8 second three times.
  • Page 23 MICOM FUNCTION 2-15. Sequential operation of built-in product Built-in products such as compressor, frost removal heater, freezing room fan, Cooling Fan and step motor damper are sequentially operated as follows for preventing noise and part damage occurred due to simultaneous operation of a lot of parts in applying initial power and completing test.
  • Page 24 MICOM FUNCTION 2-16. Failure Diagnosis Function 1. Failure diagnosis function is function to facilitate service when nonconforming matters affecting performance of product during use of product. 2. In occurrence of failure, pressing the function adjustment button does not perform function. 3.
  • Page 25 MICOM FUNCTION (2) GR-L267BV(T)RA, GR-L267BV(T,S)PA Model Failure Code Indication Part EXPRESS FILTER DIGITAL CONTROL CUBE (EXPRESS) FILTER RESET HOLD 3SECS ROOM TEMPERATURE WATER LOCK 3 SECS FRZ TEMP REF TEMP CRUSH (JET) DISPENSER & BUTTON : Proper operation Failure code indication part Product operation status in failure Item Freezer room...
  • Page 26 MICOM FUNCTION Note1) R2-sensor, OptiChill sensor and water tank sensor, Ice maker-sensor, Ice maker Unit are not indicated on the failure indicating part but indicated in checking Display(When pressing for more than the button of freezing temperature and super freezer button for more than 1 second). R2-sensor (middle room) Normal: LED or LCD graphic on the (C) part turns on or Abnormal Drive Micom...
  • Page 27 MICOM FUNCTION 2-17. Test Function 1. The purpose of test function is to check function of the PWB and product and to search for the failure part at the failure status. 2. Test button is placed on the main PCB of refrigerator (test switch), and the test mode will be finished after maximum 2 hours irrespective of test mode and then is reset to the normal status.
  • Page 28 MICOM FUNCTION 2-18. Function of dispenser and water dispenser built-in 1. This is function allowing ice and water to come outside without opening door. 2. If pressing the dispenser switch (rubber button) after selecting ice (cube ice, crushed ice) or water, ice and water equivalent to each come out.

  • Page 29: Explanation For Micom Circuit

    EXPLANATION FOR MICOM CIRCUIT 1. Explanation for PWB circuit 1-1. Power circuit The power circuit includes a Switched Mode Power Supply (SMPS). It consists of a rectifier (BD1 and CE1) converting AC to DC, a switch (IC2) switching the DC voltage, a transformer, and a feedback circuit (IC3 and IC4). Caution : Since high voltage (160 Vdc) is maintained at the power terminal, wait at least 3 minutes after unplugging the appliance to check the voltages to allow the current to dissipate.
  • Page 30 (2) GR-L267BV(T)RA (3) GR-L267BV(T,S)PA - 30 -...
  • Page 31 EXPLANATION FOR MICOM CIRCUIT 1-2. Oscillation circuit The oscillation circuit generates a basic clock signal for synchronization and time calculation related to the transmission of data and calculations made by the MICOM (IC1). The oscillator (OSC1) must always be replaced with an exact rated part, because if this spec is changes, the time calculations of the MICOM will be affected and it might not work at all.
  • Page 32 1-3. Reset circuit The RESET circuit allows various parts of the MICOM, such as RAM, defrosting, etc., to be restarted from the initial state when power is interrupted or restored. A LOW signal applied to the reset terminal for 10 ms causes the MICOM to reset itself.
  • Page 33 EXPLANATION FOR MICOM CIRCUIT 1-4. Load/dispenser operation, door opening circuit 1. LOAD DRIVING CIRCUIT ✽ The fan operates at the regular speed even if the door of the refrigerator or freezer is opened. When the doors are closed, the fan reverts to its original speed. ✽...
  • Page 34 EXPLANATION FOR MICOM CIRCUIT (2) GR-L267BV(T)RA (3) GR-L267BV(T,S)PA Frost Removal AC Converting Refrigerator Dispensor Type of Load Compressor Heater Relay LAMP Heater Measuring part (IC6) IC6-15 IC6-11 IC6-10 IC6-14 IC6-12 Within 1 V Status 12 V - 34 -...
  • Page 35 EXPLANATION FOR MICOM CIRCUIT 2. Dispenser operation circuit (1) GR-L267BV(T)R 1) Check load driving status WATER VALVE GEARED SOLENOID SOLENOID Type of Load MOTOR CUBE DISPENSER WATER Measuring part IC6-11 IC6-10 IC7-15 IC7-13 Within 1 V Status 12 V 2) Lever Switch sensing circuit Measuring part IC1(Micom) (No.
  • Page 36 EXPLANATION FOR MICOM CIRCUIT (2) GR-L267BV(T)RA 1) Check load driving status WATER VALVE GEARED SOLENOID SOLENOID Type of Load MOTOR CUBE DISPENSER WATER Measuring part IC6-11 IC6-10 IC7-15 IC7-13 Within 1 V Status 12 V 2) Lever Switch sensing circuit Measuring part IC1(Micom) (No.
  • Page 37 EXPLANATION FOR MICOM CIRCUIT (3) GR-L267BV(T,S)PA 1) Check load driving status WATER VALVE GEARED SOLENOID SOLENOID Type of Load MOTOR CUBE DISPENSER WATER Measuring part IC7-20 IC7-19 IC7-17 IC7-15 Within 1 V Status 12 V 2) Lever Switch sensing circuit Measuring part IC1(Micom) (No.
  • Page 38 EXPLANATION FOR MICOM CIRCUIT 3. Door opening sensing circuit (1) GR-L267BV(T)R (2) GR-L267BV(T)RA (3) GR-L267BV(T,S)PA Measuring part IC1 (MICOM) No. (44, 45) / (45, 46) / (47, 48) Pin Door of Freezer / Refrigerator Closing 5 V ( A - B , C - D . Switch at both ends are at Off status) Opening 0 V ( A - B , C - D .
  • Page 39 EXPLANATION FOR MICOM CIRCUIT 1-5. Temperature sensing circuit (1) GR-L267BV(T)R (2) GR-L267BV(T)RA 10KF CE18 CC32 - 39 -...
  • Page 40 EXPLANATION FOR MICOM CIRCUIT (3) GR-L267BV(T,S)PA The circuits involving the freezer and refrigerator sensors controls the temperature in both the freezer and the refrigerator. The Icemaker sensor detects when ice is made. The defrost sensor determines both the need for defrosting and the efficiency of the defrost operation.
  • Page 41 EXPLANATION FOR MICOM CIRCUIT 1-6. Switch entry circuit The following circuits are sensing signal form the test switch, damper motor reed switch for testing and diagnosing the refrigerator. (1) GR-L267BV(T)R (2) GR-L267BV(T)RA (3) GR-L267BV(T,S)PA - 41 -...
  • Page 42 EXPLANATION FOR MICOM CIRCUIT 1-7. Option designation circuit (model separation function) (1) GR-L267BV(T)RA (2) GR-L267BV(T,S)PA The circuits shown above vary according to which features are included on your particular model. uThese circuits are preset at the factory and cannot be altered. NOTE: The chart makes absolutely no sense.
  • Page 43 EXPLANATION FOR MICOM CIRCUIT 1-8. Stepping motor operation circuit (1) GR-L267BV(T)R (2) GR-L267BV(T)RA (3) GR-L267BV(T,S)PA - 43 -...
  • Page 44 EXPLANATION FOR MICOM CIRCUIT The motor is driven by magnetism formed in the areas of the coils and the stator. Rotation begins when a HIGH signal is applied to MICOM Pin 33 of IC10 (TA7774F). This causes an output of HIGH and LOW signals on MICOM pins 34 and 35. Explanation) The stepping motor is driven by sending signals of 3.33 mSEC via MICOM pins 33, 34, and 35, as shown in the chart below.
  • Page 45 EXPLANATION FOR MICOM CIRCUIT 1-9. Fan motor driving circuit (freezer, mechanical area) 1. The circuit cuts all power to the fan drive IC, resulting in a standby mode. 2. This circuit changes the speed of the fan motor by varying the DC voltage between 7.5 Vdc and 16 Vdc. 3.
  • Page 46 EXPLANATION FOR MICOM CIRCUIT (2) GR-L267BV(T)RA (3) GR-L267BV(T,S)PA - 46 -...
  • Page 47 EXPLANATION FOR MICOM CIRCUIT 1-10. Temperature compensation and temperature compensation circuit 1. Temperature compensation in freezer and refrigerator (1) GR-L267BV(T)R (2) GR-L267BV(T)RA Temperature compensation at refrigerator Temperature compensation at freezer (3) GR-L267BV(T,S)PA Temperature compensation at refrigerator Temperature compensation at freezer Freezer Refrigerator Resistance value...
  • Page 48 EXPLANATION FOR MICOM CIRCUIT u Temperature compensation table at the refrigerator is as follows: Modification resistance 470 Ω 2 kΩ 3.3 kΩ 5.6 kΩ 8.2 kΩ 10 kΩ 12 kΩ 18 kΩ 33 kΩ 56 kΩ 180 kΩ Current resistance 0.5 °C 1 °C 1.5 °C...
  • Page 49 EXPLANATION FOR MICOM CIRCUIT 2. Compensation circuit for temperature at freezer (1) GR-L267BV(T)RA (2) GR-L267BV(T,S)PA Temperature compensation in CUT JCR1 +1 °C [+1.8 °F] +2 °C [+3.6 °F] JCR2 +1 °C [+1.8 °F] JCR3 -1 °C [-1.8 °F] -2 °C [-3.6 °F] JCR4 -1 °C [-1.8 °F] Compensation...
  • Page 50 EXPLANATION FOR MICOM CIRCUIT 1-11. Communication circuit and connection L/Wire between main PCB and display PCB The following communication circuit is used for exchanging information between the main MICOM of the Main PCB and the dedicated MICOM of the LED (LCD) Display PCB. A bi-directional lead wire assembly between the two boards is required for the display to function properly.
  • Page 51 EXPLANATION FOR MICOM CIRCUIT (2) GR-L267BV(T)RA FILTER EXPRESS CUBE DIGITAL CONTROL FILTER RESET HOLD 3SECS ROOM TEMPERATURE WATER LOCK 3 SECS FRZ TEMP REF TEMP CRUSH DISPENSER & BUTTON (3) GR-L267BV(T,S)PA FILTER CUBE DIGITAL CONTROL EXPRESS FILTER RESET ROOM TEMPERATURE HOLD 3SECS WATER LOCK...
  • Page 52 EXPLANATION FOR MICOM CIRCUIT 2) Sensor resistance characteristics table Cold storage sensor 1&2 Measuring Temperature (°C) Freezing Sensor Frost removal sensor, Outside sensor -20 °C 22.3 kΩ 77 kΩ -15 °C 16.9 kΩ 60 kΩ -15 °C 13.0 kΩ 47.3 kΩ -5 °C 10.1 kΩ...
  • Page 53 EXPLANATION FOR MICOM CIRCUIT 1-12. OptiChill stepping MOTOR/Display (1) GR-L267BV(T,S)PA 1-13. Jet freezing (1) GR-L267BV(T,S)PA - 53 -...

  • Page 54: Pwb Parts Diagram And List

    EXPLANATION FOR MICOM CIRCUIT 2. PWB parts diagram and list 2-1. PWB Assembly, main part diagram (1) GR-L267BV(T)R - 54 -...
  • Page 55 EXPLANATION FOR MICOM CIRCUIT (2) GR-L267BV(T)RA - 55 -...
  • Page 56 EXPLANATION FOR MICOM CIRCUIT (3) GR-L267BV(T,S)PA - 56 -...
  • Page 57 EXPLANATION FOR MICOM CIRCUIT 2-2. Parts list (1) GR-L267BV(T)R - 57 -...
  • Page 58 EXPLANATION FOR MICOM CIRCUIT - 58 -...
  • Page 59 EXPLANATION FOR MICOM CIRCUIT (2) GR-L267BV(T)RA - 59 -...
  • Page 60 EXPLANATION FOR MICOM CIRCUIT - 60 -...
  • Page 61 EXPLANATION FOR MICOM CIRCUIT (3) GR-L267BV(T,S)PA - 61 -...
  • Page 62 EXPLANATION FOR MICOM CIRCUIT - 62 -...
  • Page 63 EXPLANATION FOR MICOM CIRCUIT 2-3. DISPLAY ASSEMBLY part diagram (1) GR-L267BV(T)R - 63 -...
  • Page 64 (2) GR-L267BV(T)RA, GR-L267BV(T,S)PA - 64 -...
  • Page 65 2-4. DISPLAY circuit diagram (1) GR-L267BV(T)R - 65 -...
  • Page 66 EXPLANATION FOR MICOM CIRCUIT (2) GR-L267BV(T)RA, GR-L267BV(T,S)PA - 66 -...

  • Page 67: Pwb Circuit Diagram

    EXPLANATION FOR MICOM CIRCUIT 3. PWB Circuit Diagram may vary according to model. (1) GR-L267BV(T)R - 67 -...
  • Page 68 EXPLANATION FOR MICOM CIRCUIT - 68 -...
  • Page 69 (2) GR-L267BV(T)RA - 69 -...
  • Page 70 - 70 -...
  • Page 71 (3) GR-L267BV(T,S)PA - 71 -...
  • Page 72 - 72 -...

  • Page 73: Ice Maker And Dispenser Working Principles And Repair

    ICE MAKER AND DISPENSER WORKING PRINCIPLES AND REPAIR 1. Working Principles 1-1. Ice Maker Working Principles Power Input Initial Control • Level Ice Maker Cube Mould for “Initial Control” after power is input. Ice Making Control • Wait until the water in the cube mould is frozen after ice maker starts operation.

  • Page 74: Function Of Ice Maker

    ICE MAKER AND DISPENSER WORKING PRINCIPLES AND REPAIR 2. Function of Ice Maker 2-1. Initial Control Function 1. When power is initially applied or reapplied after power cut, it detects level of ice maker cube mould after completion of MICOM initialization. The detecting lever moves up and down. 2.
  • Page 75 ICE MAKER AND DISPENSER WORKING PRINCIPLES AND REPAIR 2-4. Ice Ejection Control Function 1. This is to eject ice from ice maker cube mould after ice making is completed. 2. If Hall IC signal is on within 3.6 seconds after ice ejection motor rotates in normal direction, it does not proceed ice ejection but waits.
  • Page 76 ICE MAKER AND DISPENSER WORKING PRINCIPLES AND REPAIR 2-5 Test Function 1. It is to force the operation during operation test, service, and cleaning. The test switch is mounted under the automatic ice maker. The test function starts when the test switch is pressed for more than 0.5 second. 2.

  • Page 77: Ice Maker Troubleshooting

    ICE MAKER AND DISPENSER WORKING PRINCIPLES AND REPAIR 3. Ice Maker Troubleshooting * Troubleshooting: it is possible to confirm by pressing freezer and refrigerator temperature control buttons for more than 1 second. (ice maker is normal if all leds are on): refer to trouble diagnposis function in MICOM function 2-8 (page 21) Is DC Power (5V and 12V) Failed DC Power...
  • Page 78 ICE MAKER AND DISPENSER WORKING PRINCIPLES AND REPAIR 4. Ice Maker Circuits (1) GR-L267BV(T)R 2) GR-L267BV(T)RA - 78 -...

  • Page 79: Ice Maker Circuit

    ICE MAKER AND DISPENSER WORKING PRINCIPLES AND REPAIR (3) GR-L267BV(T,S)PA The above ice maker circuits are applied to GR-L267BV(T)R, GR-L267BV(T)RA, GR-L267BV(T,S)PA and composed of ice maker unit in the freezer and ice maker driving part of main PWB. Water is supplied to the ice maker cube mould through the solenoid relay for ice valve of solenoid valve in the machine room by opening valve for the set time.

  • Page 80: Circuit

    CIRCUIT (1) GR-L267BV(T)R 3854JD1125A - 80 -...
  • Page 81 CIRCUIT (2) GR-L267BV(T)RA 3854JD1125B - 81 -...
  • Page 82 CIRCUIT (3) GR-L267BV(T,S)PA 3854JD1125C - 82 -...

  • Page 83: Trouble Diagnosis

    TROUBLE DIAGNOSIS 1. TroubleShooting CLAIMS. CAUSES AND CHECK POINTS. HOW TO CHECK * Measuring instrument: 1) No power at outlet. 1. Faulty start Multi tester 2) No power on cord. I Check the voltage. Bad connection between adapter and outlet. (faulty adapter) The Inner diameter of adapter.
  • Page 84 TROUBLE DIAGNOSIS CLAIMS. CAUSES AND CHECK POINTS. HOW TO CHECK I Heat a clogged evaporator to 2. No cooling. 2) Refrigeration system is clogged. check it. As soon as the Moisture Residual moisture Air Blowing. Not performed. cracking sound starts, the clogged.
  • Page 85 TROUBLE DIAGNOSIS CLAIMS. CAUSES AND CHECK POINTS. HOW TO CHECK 3. Refrigeration 1) Refrigerant Partly leaked. Weld joint leak. is weak. Parts leak. 2) Poor defrosting capacity. I Check visually. Drain path (pipe) clogged. Inject adiabatics into drain Inject through the hose.
  • Page 86 TROUBLE DIAGNOSIS CLAIMS. CAUSES AND CHECK POINTS. HOW TO CHECK 3. Refrigeration Residual Weak heat from heater. Sheath Heater - rated. is weak. frost. Heater plate No contact to drain. Loosened stopper cord. Heater cord-L Not touching the evaporator pipe. Location of assembly (top and middle).
  • Page 87 TROUBLE DIAGNOSIS CLAIMS. CAUSES AND CHECK POINTS. HOW TO CHECK 3. Refrigeration 4) No cooling air circulation. is weak. Faulty fan motor. Fan is Fan shroud contact. - Clearance. constrained. Damping evaporator contact. Accumulated residual frost. Small cooling air Insufficient Fan overload.
  • Page 88 TROUBLE DIAGNOSIS CLAIMS. CAUSES AND CHECK POINTS. HOW TO CHECK 4. Warm 1) Colgged cooling path. refrigerator Adiabatics liquid leak. compartment Foreign materials. –– Adiabatics dump liquid. temperature. 2) Food storate. Store hot food. Store too much at once. Door open. Packages block air flow.
  • Page 89 TROUBLE DIAGNOSIS CLAIMS. CAUSES AND CHECK POINTS. HOW TO CHECK 6. Condensation 4) Condensation on door. and ice Condensation on the duct door. - Duct door heater is cut. formation. Condensation on the Recess Heater is cut. dispense recess. Duct door is open. / Foreign material clogging. Condensation on the Not fully filled.
  • Page 90 TROUBLE DIAGNOSIS CLAIMS. CAUSES AND CHECK POINTS. HOW TO CHECK 7. Sounds 1) Compressor compartment operating sounds. Transformer sound. Its own fault. –– Core gap. Bad connection. –– Correct screw connection. Drip tray vibration sound. Bad assembly. Distortion. Foreign materials inside. Back cover machine sound.
  • Page 91 TROUBLE DIAGNOSIS CLAIMS. CAUSES AND CHECK POINTS. HOW TO CHECK 8. Faulty lamp 1) Lamp problem. Filament blows out. (freezer and Glass is broken. refrigerator 2) Bad lamp assembly. Not inserted. compartment). Loosened by vibration. 3) Bad lamp socket. Disconnection. Bad soldering.
  • Page 92 TROUBLE DIAGNOSIS CLAIMS. CAUSES AND CHECK POINTS. HOW TO CHECK 10. Structure, 1) Door foam. appearance, Sag. Hinge loose Bolt is loosened during and others. transportation. Not tightly fastened. Screw worn out . Weak gasket Adhesion surface. adhesion. Fixed tape. Not well fixed.

  • Page 93: Faults

    2. Faults 2-1. Power Problems Causes Checks Measures Remarks No power on - Power cord cut. - Check the voltage with tester. -Replace the components. outlet. - Faulty connector insertion. - Check visually. -Reconnect the connecting parts. - Faulty connection between plug - Check visually.
  • Page 94 2-3. Temperature Problems Causes Checks Measures Remarks High Poor cool air circulation due to faulty - Lock –– Check resistance with a - Replace fan motor. temperature fan motor. tester. in the freezer 0Ω: short. ∞Ω: cut. compartment. - Reconnect and reinsert. - Rotate rotor manually and check rotation.
  • Page 95 2-4. Cooling Problems Causes Checks Measures Remarks High Refrigerant leak. Check sequence Weld the leaking part, recharge the Drier must be replaced. temperature 1. Check the welded parts of the refrigerant. in the freezer drier inlet and outlet and drier compartment.
  • Page 96 Problems Causes Checks Measures Remarks High Cycle pipe is clogged. Check sequence. - Heat up compressor discharging Direr must be replaced. temperature in 1. Check temperature of condenser weld joints with touch, disconnect the freezer manually. the pipes, and check the clogging. compartment.
  • Page 97 2-5. Defrosting failure Problems Causes Checks Measures Remarks No defrosting. Heater does not generate heat as 1. Check the resistance of heater. Heating wire is short and wire is cut. Seal the lead wire with 0Ω: Short. ∞Ω: Cut. the heating wire is cut or the circuit •...
  • Page 98 Problems Causes Checks Measures Remarks No defrosting Melting fuse blows. - Check melting fuse with tester. - Faullty parts: parts replacement. 1) Lead wire is cut. If 0Ω: OK. - Check wire color when maeasuring If ∞Ω: wire is cut. 2) Bad soldering.

  • Page 99: Icing

    2-6. Icing Problems Causes Checks Measures Remarks Icing in the 1) Bad circulation of cool air. - Check the food is stored properly - Be acquainted with how to use. - Check the defrost refrigerator - Clogged intake port in the (check discharge and intake port - Sealing on connecting parts.
  • Page 100 Problems Causes Checks Measures Remarks Ice in the freezer 1) Bad cooling air circulation. - Check food storage conditions - Be acquainted with how to use. - Check the parts related compartment. - Intake port is clogged in the freezer visually.(Check clogging at intake - Check defrost (Check ice on the to defrosting if the...
  • Page 101 2-7. Sound Problems Causes Checks Measures Remarks Hiss sound 1. Loud sound of compressor 1.1 Check the level of the 1) Maintain horizontal level. operation. refrigerator. 2) Replace bushing and seat if they 1.2 Check the bushing seat are sagged and aged. conditions (sagging and aging).
  • Page 102 Problems Causes Checks Measures Remarks Vibration sound. 1. Vibration of shelves and foods in 1-1. Remove and replace the 1) Reassemble the vibrating parts Clack. the refrigerator. shelves in the refrigerator and insert foam or cushion where 2. Pipes interference and capillary 1-2.
  • Page 103 Problems Causes Checks Measures Remarks Sound Popping It happens when refrigerant expands - Check the sound of refrigerant at the - Check the restrainer attached on the (almost the same at the end of capillary tube. initial installation. evaporator and capillary tube weld as animals crying - Check the sound when the refrigerator joints and attach another restrainer.
  • Page 104 2-8. Odor Problems Causes Checks Measures Remarks Food Odor. Food (garlic, kimchi, etc) - Check the food is not wrapped. - Dry the deodorizer in a sunny place - Check the shelves or inner with adequate ventilation. wall are stained with food juice. - Store the food in the closed - Be sure food is securely covered container instead of vinyl wraps.
  • Page 105 2-9. Micom Problems Symptom Causes Checks Measures Remarks Bad PCB All display Bad connection Bad connector Visual check on connector Reconnect electric power. LCD are off. between Main PCB connection from main connection. connector. and display circuit. PCB to display PCB. Defective PCB PCB transformer Check resistance of PCB...
  • Page 106 Problems Symptom Causes Checks Measures Remarks Bad cooling. Freezer Compressor does Compressor Lead Wire Check compressor Lead Wire Reconnect Lead temperature is not start. is cut. with a tester. Wire. high. Defective compressor Measure voltage at PCB CON2 Replace relay RY1 Refer to load driving relay.
  • Page 107 Problems Symptom Causes Checks Measures Remarks Bad cooling Wrong Defective Step Motor Check Step Motor Check if Step Motor damper Reconnect lead Refrigerator Damper. damper motor and motor and reed switch lead wire. temperature. reed switch and lead wire are cut with a tester. wire are cut.
  • Page 108 Problems Symptom Causes Checks Measures Remarks Bad defrost. Defrost is not Defrost lead wire is cut. Check if defrost lead wire is cut with a Reconnect Lead working. tester. Wire. Defective defrost driving relay. Check the voltage of CON2 (1 and 7) Replace relay (RY 7 Refer to load with a tester after pressing main and RY 3) or PCB.
  • Page 109 Problems Symptom Causes Checks Measures Remarks Defective Buzzer does Trouble mode indication. Check trouble diagnosis function. Repair troubles Refer to mode display button. not sound indication in and buttons function do not operate. explanations. Door Buzzer Buzzer Defective connecting lead wire from Check lead wire associated with door Repair lead wire.

  • Page 110: Cooling Cycle Heavy Repair

    TROUBLE DIAGNOSIS 3. Cooling Cycle Heavy Repair 3-1. The Heavy Repair Standards for Refrigerator with R134a Refrigerant Items Unit Standards Purposes Remarks Pipe and piping Min. Pipe:within 1 hour. To protect The opening time should be reduced to a system opening time. Comp:within Moisture half of the standards during rain and...
  • Page 111 TROUBLE DIAGNOSIS 3-2. Summary Of Heavy Repair Process Contents Tools Trouble diagnosis Remove refrigerant - Cut charging pipe ends and discharge refrigerant from Filter, side cutters Residuals drier and compressor. - Use R134a oil and refrigerant for compressor and drier Pipe Cutter, Gas welder, N - Confirm N sealing and packing conditions before use.
  • Page 112 TROUBLE DIAGNOSIS 3-3. Precautions During Heavy Repair Items Precautions 1. Use of tools. 1) Use special parts and tools for R134a. 2. Recovery of refrigerant. 1) Continue to recover the refrigerant for more than 5 minutes after turning the refrigerator off. 2) Install a piercing type valve on the high pressure line (drier side).
  • Page 113 TROUBLE DIAGNOSIS 3-4. Practical Work For Heavy Repair Items Precautions Evaporator 1. Removal of residual Low pressure side refrigerant. KEY POINT Hot Line Compressor Observe the sequence for removal of refrigerant. Drier Suction (If not, compressor oil may leak.) High pressure side Release Condenser Refrigent...
  • Page 114 TROUBLE DIAGNOSIS Items Precautions Evaporator 4. Vacuum degassing. Suction pipe Hot Line Compressor Drier Condenser pressure High Blue pressure Yellow KEY POINT - If power is applied Vaccum Pump during vacuum degassing, vacuum degassing shall be more effective. Pipe Connection - Run the compressor Connect the red hose to the high pressure side and the blue hose to the while charging the...
  • Page 115 TROUBLE DIAGNOSIS Items Precautions Evaporator Hot Line Compressor Drier Condenser Charging Canister 4) Refrigerant Charging Charge refrigerant while operating a compressor as shown above. 5) Pinch the charging pipe with a pinch-off plier after completion of charging. 6) Braze the end of a pinched charging pipe with copper brazer and take a gas leakage test on the welded parts.
  • Page 116 TROUBLE DIAGNOSIS 3-6. Brazing Reference Drawings - 116 -...

  • Page 117: How To Deal With Claims

    TROUBLE DIAGNOSIS 4. HOW TO DEAL WITH CLAIMS 4-1. Sound Problems Checks and Measures I Explain general principles of sounds. Hiss sounds • All refrigerators make noises when they run. The compressor and fan produce sounds. There is a fan in the freezer compartment which blows cool air to freezer and refrigerator compartments.
  • Page 118 TROUBLE DIAGNOSIS Problems Checks and Measures I Explain the flow of refrigerant. Sounds of water flowing • When the refrigerator stops, the water flowing sound happens. This sound happens when the liquid or vapor refrigerant flows from the evaporator to compressor. I Explain the characteristics of moving parts.
  • Page 119 TROUBLE DIAGNOSIS 4-2. Measures for Symptoms on Temperature Problems Checks and Measures I Check temperature set in the temperature control knob. Refrigeration is weak. • Refrigerator is generally delivered with the button set at normal use (MID). But customer can adjust the temperature set depending on their habit and taste. If you feel the refrigeration is weak, then set the temperature control button at strong position.
  • Page 120 TROUBLE DIAGNOSIS 4-3. Odor and Frost Problems Checks and Measures I Explain the basic principles of food odor. Odor in the refrigerator compartment. • Each food has its own particular odor. Therefore it is impossible to prevent or avoid food odor completely when food is stored in the completely sealed refrigerator compartment.
  • Page 121 TROUBLE DIAGNOSIS 4-5. Others Problems Checks and Measures I Explain the principles of radiator. The refrigerator case is hot. • The radiator pipes are installed in the refrigerator case and partition plate between the refrigerator and the freezer compartment in order to prevent condensation formation.

  • Page 122: How To Disassemble And Assemble

    HOW TO DISASSEMBLE AND ASSEMBLE 1. DOOR (3) Disconnect upper hinge from the hinge supporter by grasping the front part of upper hinge and lifting up (Hinge Assembly, U) in arrow direction A and pull 1) Remove lower cover and then disconnect water forward in arrow B direction.

  • Page 123: Handle

    HOW TO DISASSEMBLE AND ASSEMBLE 2. HANDLE 2. Aluminum short handle Model 1) Grasp the handle by both hands and hold it upward. 1. Aluminum Handle Model 1) Use a small screwdriver blade in the groove at the side of the Deco Handle to lift and separate the cover. Twist down in the direction of arrow and lift the cover in the direction of arrow...

  • Page 124: Fan Shroud Grille

    3. FAN SHROUD GRILLE 4. ICEMAKER ASSEMBLY 1) Loosen two screws after disconnecting a cap screw of a 1. Dispenser Model grille fan (U) with a screwdriver balde. 1) How to disassemble: 2) Disassembly of a grille fan (U) : Pull forward after opening hook at ➝...

  • Page 125: Dispenser

    HOW TO DISASSEMBLE AND ASSEMBLE 5. DISPENSER 4) Loosen four screws with a phillips screwdriver and pull the funnel Assembly to disconnect. 1) Disconnect funnel and button assembly by pulling down and forward. Funnel Assembly Funnel Assembly Button 5) The Duct Cap Assembly can be disconnected if the hold lever connecting screw is loosened with a phillips driver.
  • Page 126 HOW TO DISASSEMBLE AND ASSEMBLE 7) Dispenser Related Parts 277A FRAME ASSEMBLY, DISPLAY COVER, DISPENSER DECO, FRAME DISPLAY PWB(PCB) ASSEMBLY, DISPLAY BUTTON ASSEMBLY BUTTON DECO FUNNEL ASSEMBLY MICRO SWITCH FRAME, FUNNEL 10 LEVER(SWITCH) 11 FUNNEL 12 BUTTON LEVER 13 HOLLDER BUTTON 14 SOLENOID ASSEMBLY 15 SPRING 16 LEVER HOLDER...

  • Page 127: Exploded View

    EXPLODED VIEW FREEZER DOOR PART: GR-L267BV(T)RA : Optional part 200A 202A 205A 205E 210A 205C 205B 210B 205D 210B 205F 210C 201A 203A - 127 -...
  • Page 128 EXPLODED VIEW FREEZER DOOR PART: GR-L267BV(T, S)PA : Optional part 200A 202A 210A 210B 205A 210B 210C 201A 203A - 128 -...
  • Page 129 EXPLODED VIEW REFRIGERATOR DOOR PART: GR-L267BV(T)RA : Optional part 241A 241C 230A 241B 232A 147B 239A 242B 147A 205A 205E 242C 242A 205C 242D 243A 240A 243A 205B 240A 205D 205F 240C 233A 231A - 129 -...
  • Page 130 EXPLODED VIEW REFRIGERATOR DOOR PART: GR-L267BV(T,S)PA : Optional part 241A 241C 230A 241B 232A 147B 239A 242B 147A 242C 242A 242D 243A 240A 205A 243A 240A 240C 233A 231A - 130 -...
  • Page 131 EXPLODED VIEW FREEZER COMPARTMENT: GR-L267BV(T, S)*A : Optional part 270A 270C 402A 271B 271A 137A 136D 403A 136B 135A 136C 152A 329A 128C* 400A 302B 401A 128C 128D* 130A 128E 128D 120B 121A 128F 403D 120C 272A 127B 103A 408A 135B 105B 125A...
  • Page 132 EXPLODED VIEW REFRIGERATOR COMPARTMENT: GR-L267BV(T, S)*A : Optional part 140A 146A 270B 270D 402A 271B 271C 171A 141A 624D 140B 624B 624C 171B 624A 152A 116A 115A 170A 152A 142A 142C 142D 401A 151A 177A 142B 150A 177B 142D 155A 166A 272B 166B...
  • Page 133 EXPLODED VIEW ICE & WATER PART: GR-L267BV(T, S)*A : Optional part 625A 618A 616E 616F 616G 616D 623A 627A 404A 619A 612A 612C 612B 600A 610A 607A 611A 602A 611C 605A 611B 604A 611D 601A 603B 603A 404B 614A 613A 621B 606A - 133 -...
  • Page 134 EXPLODED VIEW MACHINE COMPARTMENT: GR-L267BV(T, S)*A : Optional part 502A 101B 411A 410H 303A 410G 500A 303B 304A 101A 303C 502B 303D 313A 300A 310B 307A 307A 317A 301A 317B 104A 306A 308B 309A 309C 305A 403B 305B 310A 309B 305C 308C 308A...
  • Page 135 EXPLODED VIEW DISPENSER PART: GR-L267BV(T, S)*A : Optional part 278A 277A 278C 402C 278B 276A 275A 278F 405A 275D 275C 276B 275B 280E 279B 501A 401C 280A 280F 278G 281A 280B 280C 279A - 135 -...
  • Page 136 EXPLODED VIEW FREEZER DOOR PART: GR-L267BV(T)R 200A 202A 210A 205A 210B 210B 210B 201A 203A - 136 -...
  • Page 137 EXPLODED VIEW REFRIGERATOR DOOR PART: GR-L267BV(T)R 241A 230A 241C 241B 232A 239A 147A 240A 243A 240A 205A 243A 240A 240C 233A 231A - 137 -...
  • Page 138 EXPLODED VIEW FREEZER COMPARTMENT: GR-L267BV(T)R 270A 270C 402A 271B 271A 137A 136D 403A 136B 135A 136C 152A 329A 400A 302B 401A 128C 130A 128E 128D 128F 120B 120B 120C 272A 103A 408A 135B 105B 125A 312A 126A - 138 -...
  • Page 139 EXPLODED VIEW REFRIGERATOR COMPARTMENT: GR-L267BV(T)R 140A 270B 270D 146A 402A 271B 271C 624D 171A 624B 141A 140B 624C 171B 624A 116A 115A 170A 152A 140A 401A* 151A 177A 150A 177B 155A* 166A 272B 166B 165A 103A 504A 409B 162A 150B 162B 168A - 139 -...
  • Page 140 EXPLODED VIEW ICE & WATER PART: GR-L267BV(T)R 625A 618A 616E 616F 616G 616D 623A 627A 404A 619A 612A 612C 612B 600A 610A 607A 611A 602A 611C 605A 611B 604A 611D 601A 603B 603A 404B 614A 613A 621B 606A - 140 -...
  • Page 141 EXPLODED VIEW MECHANICAL COMPARTMENT: GR-L267BV(T)R 502A 101B 411A 410H 303A 410G 500A 303B 304A 101A 303C 502B 303D 313A 300A 310B 307A 307A 317A 301A 317B 104A 306A 308B 306C 309A 309C 305A 403B 305B 310A 309B 305C 308A 308C 305C 305B - 141 -...
  • Page 142 EXPLODED VIEW DISPENSER PART: GR-L267BV(T)R 278A 277A 278C 402C 278B 276A 275A 278F 405A 275D 275C 275B 276B 280E 279B 501A 401C 280A 280F 278G 281A 280B 280C 279A - 142 -...

  • Page 143: Replacement Parts List

    P/No. 3828JD8797A FEB., 2005 Printed in Korea...

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