LG LRSC26980TT Service Manual
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LG LRSC26980TT Service Manual

Service manual
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See also: User Manual
REFRIGERATOR
SERVICE MANUAL
CAUTION
PLEASE READ CAREFULLY THE SAFETY PRECAUTIONS OF THIS MANUAL
BEFORE CHECKING OR OPERATING THE REFRIGERATOR.
LRSC26944SW, LRSC26944TT
LRSC26930SW, LRSC26930TT
LRSC26922SW, LRSC26922TT
LRSC26920SW, LRSC26920TT
LRSC26911SW, LRSC26911TT
LRSC26910SW, LRSC26910TT
http://biz.lgservice.com
LRSC26980TT

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Summary of Contents for LG LRSC26980TT

  • Page 1 REFRIGERATOR SERVICE MANUAL CAUTION PLEASE READ CAREFULLY THE SAFETY PRECAUTIONS OF THIS MANUAL BEFORE CHECKING OR OPERATING THE REFRIGERATOR. LRSC26944SW, LRSC26944TT LRSC26911SW, LRSC26911TT LRSC26980TT LRSC26930SW, LRSC26930TT LRSC26910SW, LRSC26910TT LRSC26922SW, LRSC26922TT LRSC26920SW, LRSC26920TT...

  • Page 2: Table Of Contents

    CONTENTS WARNINGS AND PRECAUTIONS FOR SAFETY ........................ 3 SPECIFICATIONS................................... 4 PARTS IDENTIFICATION ............................... 9 HOW TO INSTALL THE REFRIGERATOR .......................... 14 HOW TO ADJUST DOOR HEIGHT............................ 14 FILTER ....................................15 HOW TO CONTROL THE ICEMAKER WATER SUPPLY....................16 MICOM FUNCTION ................................18 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 Ref No. : LRSC26944** 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 DEFROSTING DEVICE...
  • Page 5 SPECIFICATIONS Ref No. : LRSC26930** 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 DEFROSTING DEVICE...
  • Page 6 SPECIFICATIONS Ref No. : LRSC26920**, LRSC26922** 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 SPECIFICATIONS Ref No. : LRSC26910**, LRSC26911** 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 8 SPECIFICATIONS Ref No. : LRSC26980TT ITEMS SPECIFICATIONS ITEMS SPECIFICATIONS DIMENSIONS 1771 mm DRIER MOLECULAR SIEVE XH-7 in.) CAPILLARY TUBE ID Ø0.83 NET WEIGHT 154 kg (339.5 lbs.) FIRST DEFROST 4 - 5 Hours COOLING SYSTEM Fan Cooling DEFROST CYCLE 13 - 15 Hours...

  • Page 9: Parts Identification

    PARTS IDENTIFICATION Ref No. : LRSC26944** PCB Cover Water Tubes Display Panel Dispenser Lamp Ice & Water Dispenser Button Freezer Refrigerator Water Filter Compartment Compartment Dairy Products Corner Door Rack Lamp Shelf Automatic Can Server Icemaker Grab and Go Lamp Egg Box Snack Drawer Shelf...
  • Page 10 PARTS IDENTIFICATION Ref No. : LRSC26930** PCB Cover Water Tubes Display Panel Dispenser Lamp Ice & Water Dispenser Button Freezer Refrigerator Water Filter Compartment Compartment Dairy Products Corner Door Rack Lamp Shelf Automatic Grab and Go Icemaker Wine Holder Lamp Egg Box Snack Drawer Shelf...
  • Page 11 PARTS IDENTIFICATION Ref No. : LRSC26920**, LRSC26922** PCB Cover Water Tubes Display Panel Dispenser Lamp Ice & Water Dispenser Button Freezer Refrigerator Water Filter Compartment Compartment Dairy Products Corner Door Rack Lamp Shelf Automatic Door Rack Icemaker Wine Holder Lamp Egg Box Snack Drawer Shelf...
  • Page 12 PARTS IDENTIFICATION Ref No. : LRSC26910**, LRSC26911** PCB Cover Water Tubes Display Panel Dispenser Lamp Ice & Water Dispenser Button Freezer Refrigerator Water Filter Compartment Compartment Dairy Products Corner Door Rack Lamp Shelf Automatic Door Rack Icemaker Wine Holder Lamp Egg Box Snack Drawer Shelf...
  • Page 13 PARTS IDENTIFICATION Ref No. : LRSC26980TT PCB Cover Water Tubes Display Panel Dispenser Lamp Ice & Water Dispenser Button Freezer Refrigerator Water Filter Compartment Compartment Dairy Products Corner Door Rack Lamp Shelf Automatic Can Server Icemaker Grab and Go Lamp...

  • Page 14: How To Install The Refrigerator

    HOW TO INSTALL REFRIGERATOR How to Adjust Door Height of Refrigerator I Level the refrigerator first. (If the refrigerator is not installed on a flat floor, the height of freezer and refrigerator doors may not be the same.) If the freezer door is lower than the refrigerator door: If the freezer door is higher than the refrigerator door: Insert a driver into the groove...

  • Page 15: Filter

    HOW TO INSTALL REFRIGERATOR 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 the protective cover from the o-rings. performance of the icemaker or water dispenser decreases noticeably.

  • Page 16: How To Control The Icemaker Water Supply

    HOW TO INSTALL REFRIGERATOR Ice Maker 1) How to Control the Amount of Water Supplied to Icemaker. Caution : • Do not put hands or tools into the chute to confirm the operation of geared motor. It may damage the refrigerator or hurt your hands. To gain access to the ice maker, remove the ice bin in the upper part of the freezer compartment.
  • Page 17 HOW TO INSTALL REFRIGERATOR NOTE: If the cube size is smaller or larger than you w w WARNING expected, you can regulate the size with the cube size Personal Injury Hazard button. (normally caused by variations in water pressure.) Avoid contact with the moving parts of the ejector mechanism or with the heating element that releases Every time you press the cube size button, the indicator the cubes.

  • Page 18: Micom Function

    MICOM FUNCTION 1. Monitor Panel 1-1. LRSC26944**, LRSC26980TT ICEBEAM FILTER CUBE COOLING MONTH ROOM TEMP WATER 3 SECS CRUSH DISPENSER & KEY EXPRESS/JET FRZ DISPENSER FREEZER REFRIGERATOR FILTER/LIGHT LOOK Express Freezer/Jet Freezer Dispenser and Button function selection button Lock button Dispenser selection Filter Timer Reset &...
  • Page 19 2 or 3 days. 2-1-2. LCD Back Light Control (LRSC26944**, LRSC26980TT) 1. In order to see the LCD display more easily, the backlight is turned on for one minute at the initial application of power, for 20 seconds when buttons are pressed, when a door is opened, and for 20 seconds after the door is closed.
  • Page 20 3. To unlock the controls, press and hold the lock button for more than 3 seconds. The LOCK text on the display will be turned off. LCD (LRSC26944**, LRSC26980TT) LED (All models except LRSC26944**, LRSC26980TT) LOCK CONTROL LOCK CONTROL LOCK...
  • Page 21 • The arrow mark graphic remains at the On status after flickering 4 times when selecting Special Refrigeration EXPRESS FRZ or JET FRZ. • EXPRESS FREEZE and JET FREEZE operate for a set time and then default to normal freezer operation. LCD (LRSC26944**, LRSC26980TT) EXPRESS FRZ EXPRESS/JET FRZ...
  • Page 22 MICOM FUNCTION 2-5. Express freezing 1. EXPRESS FREEZING improves the cooling speed of the freezer by running the compressor and the freezer fan. 2. In the event of power failure, EXPRESS FREEZING is cancelled and the freezer defaults to normal operation. 3.
  • Page 23 MICOM FUNCTION 2-7. OptiChill Function u u LRSC26944**, LRSC26980TT 2-7-1. OptiChill Temperature Control 1. The Optichill is positioned at the bottom of the refrigerator compartment. It allows the user to select a more specific temperature based on the foods being stored, such as meat, fish, fruits and vegetables, etc.
  • Page 24 MICOM FUNCTION 2-7-2. OptiChill Thawing & Express Chill Control 1. When you press the SELECT button on the right, the THAW LED will light. The time for the selected function will be shown. You can cycle through the options in this order: EXPRESS CHILL/THAW OFF¡EXPRESS CHILL (90 Min.)¡ THAW 0.5 lbs.
  • Page 25 MICOM FUNCTION 2-8. Variable freezing fan 1. To increase the cooling speed and load response speed, the MICOM will switches the freezer compartment fan motor between high and regular speeds. 2. The MICOM runs the freezer fan at high speed only at initial power-up, Express Freezing operation, or in response to a high load.
  • Page 26 MICOM FUNCTION 2-12. Automatic Defrost Signal 1. The beep will sound if you press the test button on the main PCB. 2. The regular cycle sounds three short beeps one second apart. 3. When you select the automatic defrost cycle, the alarm sounds three series of three short beeps one minute apart. 2-13.
  • Page 27 MICOM FUNCTION 2-15. Sequential operation of components Electromechanical parts of the appliance, such as the compressor, defrost heater, freezer fan, cooling fan, and damper motor, are operated sequentially as shown in the chart below to prevent noise and circuit overload from everything starting at once.
  • Page 28 3. If the error clears itself, the MICOM will reset and the appliance will operate as usual. 4. The failure code will be displayed as indicated in the drawings below. All other graphics and displays will be turned off. LRSC26944**, LRSC26980TT All models except LRSC26944**, LRSC26980TT : Proper operation Failure code indication part...
  • Page 29 MICOM FUNCTION Note1) The freezer and refrigerator temperature displays are also used to display error codes. The exception is that when the ambient temperature sensor fails, it shows Er in the ambient temperature display. All other display elements will function normally. Note2) The R2 sensor, Optichill sensor, and water tank sensor are not indicated in the error codes, but you can see these errors by entering the test mode by pressing and holding the Freezer Temperature and Express/Jet Freezer buttons simultaneously.
  • Page 30 MICOM FUNCTION 2-17. Test Function 1. The test function is a self-diagnostic system designed to detect problems early and to make diagnosis and repair easier and quicker. 2. The test button is on the main PCB. Test mode can run for up to 2 hours and will then default to the normal operation mode if not reset manually.
  • Page 31 MICOM FUNCTION 2-18. Door-mounted Dispenser 1. This feature allows dispensing of ice and water without having to open the refrigerator door. 2. Select CUBES, CRUSHED ICE, or WATER. Then press the dispenser switch. The duct door is operated by a solenoid. This door closes 5 seconds after ice is dispensed.

  • Page 32: Explanation For Micom Circuit

    EXPLANATION FOR MICOM CIRCUIT 1. Circuit Descriptions 1-1. Power circuit LRSC269 **** 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 allow the current to dissipate.
  • Page 33 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 34 EXPLANATION FOR MICOM CIRCUIT 1-4. 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. ✽ (A), (B), (C), and (D) of door switch for the freezer or refrigerator are connected to the door open sensing circuit in parallel toward both ends of the switch.
  • Page 35 EXPLANATION FOR MICOM CIRCUIT 1-5. Dispenser operation circuit Check load driving status WATER VALVE GEARED SOLENOID SOLENOID Type of Load MOTOR CUBE DISPENSER WATER Measuring part IC7-15 IC7-14 IC7-13 IC7-12 Within 1 V Status 12 V Lever Switch sensing circuit Measuring part IC1(Micom) (No.
  • Page 36 EXPLANATION FOR MICOM CIRCUIT 1-6. Door sensing circuit LRSC269 **** Measuring part IC1 (MICOM) No. 47, 46 Pin Door of Freezer / Refrigerator Closing 5 V ( A - B , C - D . Switch at both ends are at Off status) Opening 5 V ( A - B , C - D .
  • Page 37 EXPLANATION FOR MICOM CIRCUIT 1-7. Temperature sensing circuit LRSC269 **** ROOM-SENSOR WATER TANK -SENSOR FRZ-SENSOR DEFROST- SENSOR REF-UPPER- SENSOR REF-LOWER- SENSOR OPTICHILL- SENSOR The circuits involving the freezer and refrigerator sensors control the temperature in both the freezer and the refrigerator. The Icemaker sensor detects when ice is made.
  • Page 38 EXPLANATION FOR MICOM CIRCUIT 1-8. Switch entry circuit The following circuits sense signal from the test switch, damper motor reed switch for testing and diagnosing the refrigerator. LRSC269 **** CC10 1-9. Option designation circuit (model separation function) LRSC269 **** 48 P47 The circuits shown above vary according to which features are included on your particular model.
  • Page 39 EXPLANATION FOR MICOM CIRCUIT 1-10. Stepping motor circuit CON9 TA7774F 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 40 EXPLANATION FOR MICOM CIRCUIT 1-11. 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 41 EXPLANATION FOR MICOM CIRCUIT 1-12. Temperature compensation circuit LRSC269 **** Temperature compensation at refrigerator Temperature compensation at freezer Freezer Refrigerator Resistance value Temperature Resistance value Temperature Remarks (RCF1) compensation (RCR1) compensation 180 kΩ +5 °C [+9°F] 180 kΩ +2.5 °C [+4.5°F] Warmer 56 kΩ...
  • Page 42 EXPLANATION FOR MICOM CIRCUIT u Temperature compensation table for 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 43 EXPLANATION FOR MICOM CIRCUIT Compensation circuit for temperature of freezer LRSC269 **** 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 Compensation...
  • Page 44 EXPLANATION FOR MICOM CIRCUIT 1-13. Communication circuit 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. Poor communication occurs if a continuous information exchange fails to last more than 2 minutes between main MICOM of main PCB and LCD (LED) dedicated MICOM for LCD (LED) control of display PCB.
  • Page 45 EXPLANATION FOR MICOM CIRCUIT Sensor resistance characteristics table Cold storage sensor 1&2 Measuring Temperature (°C) Freezing Sensor Frost removal sensor, Outside sensor -20 °C (-4 °F) 22.3 kΩ 77 kΩ -15 °C (5 °F) 16.9 kΩ 60 kΩ -10 °C (14 °F) 13.0 kΩ...
  • Page 46 EXPLANATION FOR MICOM CIRCUIT 1-14. OptiChill stepping MOTOR/Display LRSC26944**, LRSC26930**, LRSC26980TT DAMPER HEATER OPTICHILL OPTICHILL STEPPING MOTOR OPTICHILL SENSOR PWB ASSEMBLY DISPLAY 1-15. Jet freezing LRSC26944**, LRSC26930** JET/FREEZER BOX FAN MOTOR - 46 -...

  • Page 47: Pwb Parts Diagram And List

    EXPLANATION FOR MICOM CIRCUIT 2. PWB parts diagram and list 2-1. PWB Assembly, main part diagram LRSC269 **** - 47 -...
  • Page 48 EXPLANATION FOR MICOM CIRCUIT 2-2. Parts list LRSC269 **** - 48 -...
  • Page 49 EXPLANATION FOR MICOM CIRCUIT - 49 -...
  • Page 50 EXPLANATION FOR MICOM CIRCUIT 2-3. LRSC26944**, LRSC26980TT DISPLAY ASSEMBLY part diagram - 50 -...
  • Page 51 EXPLANATION FOR MICOM CIRCUIT DISPLAY circuit diagram - 51 -...
  • Page 52 EXPLANATION FOR MICOM CIRCUIT 2-4. LRSC26910**, LRSC26911**, LRSC26920**, LRSC26922**, LRSC26930** DISPLAY ASSEMBLY part diagram - 52 -...
  • Page 53 EXPLANATION FOR MICOM CIRCUIT DISPLAY circuit diagram PWB ASSEMBLY DISPLAY - 53 -...

  • Page 54: Pwb Circuit Diagram

    EXPLANATION FOR MICOM CIRCUIT 3. PWB Circuit Diagram may vary according to model. LRSC269**** REF- REF- - 54 -...
  • Page 55 EXPLANATION FOR MICOM CIRCUIT ROOM-SENSOR WATER TANK -SENSOR FREEZER-SENSOR DEFROST-SENSOR FRZ-DOOR SWITCH JET FREEZER BOX FAN MOTOR REF-DOOR SWITCH REF-UPPER-SENSOR REF-LOWER-SENSOR Only Models LRSC26944**, LRSC26980TT DAMPER HEATER OPTICHILL OPTICHILL STEPPING MOTOR OPTICHILL BOX FAN MOTOR OPTICHILL SENSOR PCB ASSEMBLY DISPLAY - 55 -...

  • Page 56: Operation Principle And Repair Method Of Icemaker

    OPERATION PRINCIPLE AND REPAIR METHOD OF ICEMAKER 1. Operation Principle 1-1. Operation Principle of Icemaker Power On Start Position • Adjusts EJECTOR to Start Position with power on. Icemaking • Waits until water becomes cold after starting the Mode ice making operation. Dump •...

  • Page 57: Control Method According To Functions

    OPERATION PRINCIPLE AND REPAIR METHOD OF ICEMAKER 2. Control Method 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 58 OPERATION PRINCIPLE AND REPAIR METHOD OF ICEMAKER 2-4. Fill / Park Position 1. When Ice-Removing control (Normal Ice-Removing control, Ice-Removing control for test) has completed, and the EJECTOR is in place, this control operates the ICE SOLENOID by time check in the compressor enclosure of the refrigerator.

  • Page 59: Defect Diagnosis Function

    OPERATION PRINCIPLE AND REPAIR METHOD OF ICEMAKER 2-5. Function TEST 1. This is a compulsory operation for TEST, SVC, cleaning, etc. It is operated by pressing the water supply control KEY for 3 seconds. 2. It operates in the Icemaking mode, but not in the Ice-Removing mode or water supply process. (If there is an ERROR, it can only be checked in the TEST mode.) 3.

  • Page 60: Circuit

    CIRCUIT LRSC26944**, LRSC26980TT - 60 -...
  • Page 61 CIRCUIT LRSC26930** FREEZER COMPRESSOR FREEZER FREEZER FREEZER-LAMP FREEZER-DOOR SWITCH ICEMAKER REF-UPPER REF-LOWER REF-DOOR SWITCH - 61 -...
  • Page 62 CIRCUIT LRSC26920**, LRSC26922** FREEZER COMPRESSOR FREEZER FREEZER FREEZER-LAMP FREEZER-DOOR SWITCH REF-UPPER DISPENSER LEVER SWITCH REF-LOWER - 62 -...

  • Page 63: Trouble Diagnosis

    TROUBLE DIAGNOSIS Troubleshooting PROBLEM CAUSE/CHECK POINTS REMARKS * 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. If the voltage is within ±85% The distance between holes.
  • Page 64 TROUBLE DIAGNOSIS PROBLEM CAUSE/CHECK POINTS REMARKS 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. in the evaporator. Too short.
  • Page 65 TROUBLE DIAGNOSIS PROBLEM CAUSE/CHECK POINTS REMARKS 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. hole. Seal with drain. Adiabatics lump input.
  • Page 66 TROUBLE DIAGNOSIS PROBLEM CAUSE/CHECK POINTS REMARKS 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). Too short defrosting time.
  • Page 67 TROUBLE DIAGNOSIS PROBLEM CAUSE/CHECK POINTS REMARKS 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. - Fan misuse. Bad low termperature RPM characteristics.
  • Page 68 TROUBLE DIAGNOSIS PROBLEM CAUSE/CHECK POINTS REMARKS 4. Warm 1) Clogged cooling path. refrigerator Adiabatics liquid leak. compartment Foreign materials. –– Adiabatics dump liquid. temperature. 2) Food storage. Store hot food. Store too much at once. Door open. Packages block air flow. 5.
  • Page 69 TROUBLE DIAGNOSIS PROBLEM CAUSE/CHECK POINTS REMARKS 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 70 TROUBLE DIAGNOSIS PROBLEM CAUSE/CHECK POINTS REMARKS 1) Compressor compartment operating sounds. 7. 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. Bad connection.
  • Page 71 TROUBLE DIAGNOSIS PROBLEM CAUSE/CHECK POINTS REMARKS 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. Bad rivet contact. Short.
  • Page 72 TROUBLE DIAGNOSIS PROBLEM CAUSE/CHECK POINTS REMARKS 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. Hinge interference. Bigger door foam.

  • Page 73: Faults

    TROUBLE DIAGNOSIS - 73 -...
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  • Page 90: Cooling Cycle Heavy Repair

    TROUBLE DIAGNOSIS Cooling Cycle Heavy Repair 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 91 TROUBLE DIAGNOSIS 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 92 TROUBLE DIAGNOSIS 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 93 TROUBLE DIAGNOSIS 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 94 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 Vacuum 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 95 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 96 TROUBLE DIAGNOSIS 6. Brazing Reference Drawings - 96 -...

  • Page 97: How To Deal With Claims

    TROUBLE DIAGNOSIS HOW TO DEAL WITH CLAIMS 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 98 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 99 TROUBLE DIAGNOSIS 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 100 TROUBLE DIAGNOSIS 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 101 TROUBLE DIAGNOSIS 4. 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 102 TROUBLE DIAGNOSIS - 102 -...

  • Page 103: 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 104: Handle

    HOW TO DISASSEMBLE AND ASSEMBLE 2. HANDLE 2. Plastic handle Model 1) Use a small screwdriver blade in the groove at the side of 1. Aluminum Handle Model the Deco Handle to push it down slightly and separate the 1) Use a small screwdriver blade in the groove at the side cover.

  • Page 105: Fan Shroud Grille

    HOW TO DISASSEMBLE AND ASSEMBLE 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 106: 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. 5) The Duct Cap Assembly can be disconnected if the hold lever connecting screw is loosened with a phillips driver.

  • Page 107: Tv-Radio

    TV-RADIO 1. SAFETY PRECAUTIONS 2. FEATURE 1-1. Warning 2-1. Auto Program tuning 1. Be sure to make a safety check, if circuit is found, All stations that can be received are stored. components that appear to have overheated or are otherwise damaged should be replaced with new 2-2.
  • Page 108 TV-RADIO 3. CONTROLS Power Button Antenna Jack MENU ENTER CHA/TUN TV/RADIO POWER MENU/PRESET ENTER/MEMORY CH/TUNE VOLUME TV/RADIO POWER Menu/Preset Button Remote Control Sensor TV/Radio Button Enter/Memory Button Channel/Tune Button Volume Button Power/Standby Indicator Glows red in Standby mode, Glows green when the TV is turned on. - 108 -...
  • Page 109 TV-RADIO 4. REMOTE CONTROL KEY FUNCTIONS - When using the remote control, aim it at the remote control sensor on the TV. TV/RADIO Selects: TV or Radio. POWER tv/radio power MUTE Switches the sound on or off. mute Selects MTS sound: Mono, Stereo, or SAP. menu exit Use to scroll the Favorite channel list.

  • Page 110: Troubleshooting

    TV-RADIO 5. TROUBLESHOOTING 5-1. General Poor Symptoms Adjustment No Picture 1) No P1, P51, P52, P53, P54 connector 1) Check P1 connector and switched on 2) Poor TV Main PCB 2) Change the TV Main PCB Poor Picture 1) Poor LCD Lamp 1) Change the LCD 2) LCD Connector 2) Check connector and switched on...
  • Page 111 TV-RADIO 6. BLOCK DIAGRAM - 111 -...
  • Page 112 TV-RADIO 7. TV PART DISASSEMBLE ❶ ❷ Place tape on the outer edge of the TV case to protect the soft plastic from damage (2 or 3 layers is Using a flat bladed screwdriver, carefully pry the trim recommended). loose from the frame. ❸...

  • Page 113: Exploded View

    EXPLODED VIEWS DISPENSER RELATED PARTS 277A FRAME ASSEMBLY, DISPLAY DISPENSER COVER PWB(PCB) ASSEMBLY, DISPLAY FUNNEL ASSEMBLY MICRO SWITCH FUNNEL FRAME 10 LEVER(SWITCH) 11 FUNNEL 12 FUNNEL GUIDE 13 ROCKER SWITCH 14 SOLENOID ASSEMBLY 15 SPRING 16 LEVER HOLDER 17 DUCT CAP 19 DISPENSER LEVER 20 BUSHNIG CAP 21 BUTTON ASSEMBLY...
  • Page 114 EXPLODED VIEWS FREEZER DOOR PART: LRSC26920**, LRSC26922**, LRSC26930**, LRSC26944**, LRSC26980TT : Optional part 200A 202A 205A 205E 210A 205C 205B 210B 205D 210B 205F 210C 201A 203A - 114 -...
  • Page 115 EXPLODED VIEWS REFRIGERATOR DOOR PART: LRSC26920**, LRSC26922**, LRSC26930**, LRSC26944** : Optional part 241A 241C 230A 241B 232A 147C 147B 239A 242B 147A 205A 205E 242C 242A 205C 242D 242B 242C 242A 242D 243A 205B 240A 205D 205F 240C 233A 231A - 115 -...
  • Page 116 EXPLODED VIEWS REFRIGERATOR DOOR PART: LRSC26980TT : Optional part 241A 241C 230A 241B 232A 147C 147B 239A 242B 147A 205A 205E 242C 242A 205C 238A 242D 260B 240A 243A 205B 240A 205D 205F 240C 233A 231A - 116 -...
  • Page 117 EXPLODED VIEWS FREEZER COMPARTMENT: LRSC26920**, LRSC26922**, LRSC26930**, LRSC26944**, LRSC26980TT : Optional part 270A 270C 402A 271B 271A 137A 136D 403A 136B 135A 136C 128G 152A 329A 128H 128C* 400A 302B 401A 128C 128D* 130A 128E 120B 128D 121A 128F 403C...
  • Page 118 EXPLODED VIEWS REFRIGERATOR COMPARTMENT: LRSC26920**, LRSC26922**, LRSC26930**, LRSC26944** : Optional part 140A 140B 146B* 270B 140C 270D 146A 402A 171A 141A 271B 171B 271C 624D 624B 141B 624C 624A 141C 116A 115A 152A 170A 142A 142C 142D 152A 142B 401A 151A 177A 150A...
  • Page 119 EXPLODED VIEWS REFRIGERATOR COMPARTMENT: LRSC26980TT 140A : Optional part 140B 146B* 270B 207B 270D 140C 146A 402A 171A 141A 271B 171B 271C 624D 624B 141B 624C 624A 141C 116A 115A 152A 170A 142A 142C 142D 152A 142B 151A 401A 177A...
  • Page 120 EXPLODED VIEWS ICE & WATER PART: LRSC26920**, LRSC26922**, LRSC26930**, LRSC26944**, LRSC26980TT : Optional part 625A 618A 616E 616F 616D 616G 627A 621C 404A 619A 612A 612C 612B 610A 611A 611C 611B 611D 600A 404B 614A 621B 613A 600B 606A - 120 -...
  • Page 121 EXPLODED VIEWS MACHINE COMPARTMENT: LRSC26920**, LRSC26922**, LRSC26930**, LRSC26944**, LRSC26980TT : 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...
  • Page 122 EXPLODED VIEWS DISPENSER PART: LRSC26920**, LRSC26922**, LRSC26930**, LRSC26944**, LRSC26980TT : Optional part 278A 277A 278C 402C 278B 276A 275A 278F 405A 275D 275C 276B 275B 280D 401C 280E 501A* 279D 280F 279C 279E 278G 279B 281A 280C 280G 280B 279A...
  • Page 123 EXPLODED VIEWS FREEZER DOOR PART: LRSC26910**, LRSC26911** 200A 202A 205E 210A 205A 210C 210C 205C 210C 201A 203A - 123 -...
  • Page 124 EXPLODED VIEWS REFRIGERATOR DOOR PART: LRSC26910**, LRSC26911** 241A 230A 241C 241B 232A 239A 147A 240A 205E 205B 243A 240A 243A 240A 205D 240C 233A 231A - 124 -...
  • Page 125 EXPLODED VIEWS FREEZER COMPARTMENT: LRSC26910**, LRSC26911** 270A 270C 402A 271B 271A 137A 136D 403A 136B 135A 136C 152A 329A 128C* 400A 302B 401A 128C 128D* 130A 128E 128D 128F 120B 120B 120C 272A 103A 408A 135B 105B 125A 312A 126A - 125 -...
  • Page 126 EXPLODED VIEWS REFRIGERATOR COMPARTMENT: LRSC26910**, LRSC26911** 140A 140D 140C 270B 270D 402A 171A 271B 141A 171B 271C 624D 624B 141B 624C 624A 141C 116A 115A 170A 140A 140D 152A 401A* 151A 140C 177A 150A 177B 145A 155A* 166A 145A 272B 166B 166B 165A...
  • Page 127 EXPLODED VIEWS ICE & WATER PART: LRSC26910**, LRSC26911** 625A 618A 616E 616F 616D 616G 627A 621C 404A 619A 612A 612C 612B 610A 611A 611C 611B 611D 600A 404B 614A 621B 613A 600B 606A - 127 -...
  • Page 128 EXPLODED VIEWS MECHANICAL COMPARTMENT: LRSC26910**, LRSC26911** 502A 101B 411A 410H 303A 410G 500A 303B 304A 101A 303C 502B 303D 313A 300A 310B 307A 307A 317A 301A 317B 104A 308B 306A 306C 309A 309C 305A 403B 305B 310A 309B 305C 308C 308A 305C 305B...
  • Page 129 EXPLODED VIEWS DISPENSER PART: LRSC26910**, LRSC26911** 278A 277A 278C 402C 278B 276A 275A 278F 405A 275D 278G 275C 276B 275B 280D 401C 280E 501A* 279D 280F 279C 279E 278G 279B 281A 280C 280G 280B 279A - 129 -...

  • Page 130: Exploded Views

    EXPLODED VIEWS TV PART: LRSC26980TT - 130 -...

  • Page 131: Replacement Parts List

    P/No. 3828JD8646A FEB., 2004 Printed in Korea...

This manual is also suitable for:

Lrsc26944swLrsc26944ttLrsc26930ttLrsc26922swLrsc26922ttLrsc26920sw ... Show all

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