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LG LSC27914SB Manual De Servicio
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LG LSC27914SB Manual De Servicio

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See also: Owner's Manual
REFRIGERADOR
MANUAL DE SERVICIO
ATENCION:
ANTES DE INICIAR EL SERVICIO LEA CUIDADOSAMENTE LAS
ADVERTENCIAS DE SEGURIDAD EN ESTE MANUAL.
9
MODELOS:
LSC27914ST /01
LSC27914SW /01
LSC27914SB /01
LSC27914TT /01

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Summary of Contents for LG LSC27914SB

  • Page 1 REFRIGERADOR MANUAL DE SERVICIO ATENCION: ANTES DE INICIAR EL SERVICIO LEA CUIDADOSAMENTE LAS ADVERTENCIAS DE SEGURIDAD EN ESTE MANUAL. MODELOS: LSC27914ST /01 LSC27914SW /01 LSC27914SB /01 LSC27914TT /01...
  • Page 2 ECN (Engineering Change Number) Rev.01 (LSC27914 /01) Suction Pipe diameter...

  • Page 3: Table Of Contents

    CONTENTS CONTENTS SAFETY PRECAUTIONS ......................1. SPECIFICATIONS ....................... 2. PARTS IDENTIFICATION ....................3. DISASSEMBLY ........................1. Door Alignment........................2. Install Water Filter......................3. Refrigerator Shelves......................4. Freezer Shelf........................5. How to Control the amount of water supplied to ice maker..........4.

  • Page 4: Safety Precautions

    SAFETY PRECAUTIONS Please read the following instructions before servicing your refrigerator. 1.Check the refrigerator for current leakage. 7.Before tilting the refrigerator, remove all materials from on or in the refrigerator. 2.To prevent electric shock,unplug before servicing. 8.When servicing the evaporator, wear gloves to prevent injuries from the sharp evaporator 3.Always check line voltage and amperage.

  • Page 5: Specifications

    1. SPECIFICATIONS SPECIFICATIONS Black Super White Titanium Stainless Color 36 x 33 x 70 in Dimensions Net Weight 328.5 lbs Capacity 27 cuft Refrigerant R134a Climate class Temperate (N) Rated Rating 115V~ / 60Hz Cooling System Fan Cooling Temperature Control MICOM control Full Automatic Defrosting System...

  • Page 6: Parts Identification

    2. PARTS IDENTIFICATION Use this page to become more familiar with the parts and features. Note: This guide covers several different models.The refrigerator you have purchased may have some or all of the items listed below. The locations of the features shown below may not match your model. Refrigerator Lamp Freezer Door Rack Automatic Icemaker...

  • Page 7: Disassembly

    3. HOW TO INSTALL THE REFRIGERATOR DOOR ALIGNMENT Adjust the level when the refrigerator door is lower than the freezer door during the installation of the refrigerator. Before adjusting the doors, remove the Base Grille. Tools you need If the freezer compartment door is lower than •...

  • Page 8: Install Water Filter

    2. INSTALL WATER FILTER Installing the water filter • Filter Reset: When the Filter icon turns on, you Remove red cap from the filter and insert the two have to change the water filter. Press the Filter tabs on the filter tip into the two slots in the button for 3 seconds to turn the icon refrigerator filter receptacle.

  • Page 9: Refrigerator Shelves

    3. REFRIGERATOR SHELVES Car e an d Mai n t enance The refrigerator compartment shelf is adjustable so that you can place it at a height according to space requirement of foods. • Slide shelf Pull the shelf head towards you  , then lift both front and rear ‚...

  • Page 10: How To Control The Amount Of Water Supplied To Ice Maker

    5. HOW TO CONTROL THE AMOUNT OF 2) Turn on the electricity after connecting water pipe. WATER SUPPLIED TO ICE MAKER 1) Press the test switch under the icemaker for two seconds as shown below. 1. DISASSEMBLY ICE STORAGE BIN 2) The bell rings (ding ~ dong), the ice tray rotates, and water comes out the icemaker water tube.
  • Page 11 3-2 Control the amount of water supplied to the icemaker. Caution: • Unplug the power cord from the wall outlet and wait at least three minutes before removing the main PWB cover. 310 Volts are present in the control panel. Water Supplying Time Control Option DISP S/W Water Supply Time...

  • Page 12: How To Disassembly And Assembly

    4. HOW TO DISASSEMBLY AND ASSEMBLE 1. REMOVING AND REPLACING REFRIGERATOR DOORS Before removing the doors, remove the base grille. To remove the right (refrigerator) door: Rivet Type 1 Type 2 Rivet 1. Open the door. Remove the top hinge cover screw (1). Type 1 2.

  • Page 13: Handle Removal

    Reinstalling the right (Refrigerator) door 2. HANDLE REMOVAL NOTE: It is ALWAYS recommended to remove the refrigerator doors when it is necessary to move the refrigerator through a narrow opening. If necessary, follow the directions below to remove the door handles. •...

  • Page 14: How To Remove Swtich Lamp

    3. HOW TO REMOVE SWITCH LAMP 1. Open the door. Remove the top hinge cover screw (1). 2. Use a flat blade screwdriver to pry back the hooks (not shown) on the cabinet underside of the cover (2). Lift up the cover.

  • Page 15: Fan Shroud Grille

    4. FAN SHROUD GRILLE 5. ICEMAKER ASSEMBLY 1. Loosen one screw with a screwdriver blade. 1. Dispenser Model 2. Disassembly of an upper grille fan: Hold upper part of an upper grille fan (U) and pull forward carefully. 1) How to disassemble: (1) Remove ice bin from the freezer compartment.

  • Page 16: Water Valve Disassembly Method

    6. WATER VALVE DISASSEMBLY METHOD 1. Turn off the water supply. Then separate the Water connection connected to the water valve. Water Valve 2. Separate the cover back M/C y valve screw. Valve Screw Cover Back M/C 3. Separate the housing and pull out the valve. Housing - 15 -...

  • Page 17: Water Valve Tubes Assembly Method

    7. WATER VALVE TUBES ASSEMBLY METHOD 1) Connect the Water Filter tube (IN) to the water valve. 2) Connect the Water Filter tube (OUT) to the water valve. 3) Connect the Ice maker tube (IN) to the water valve. 4) Connect the Water Tank tube (IN) to the water valve.

  • Page 18: Disassemble Of Fan Motor

    8. FAN MOTOR DISASSEMBLY 1. Remove screws from water valve and drain pipe using a 4. Remove fan motor by pushing fan motor in direction of the phillips screwdriver. arrow. 2. Pull down drain pipe to remove it. 5. Remove the motor from housing and cut tie wrap. 3.

  • Page 19: Disassemble Of Tray Drip

    9. TRAY DRIP DISASSEMBLY 1. Remove guide fan and drain pipe screws using a phillips 4. Remove screws in compressor base in order to release screwdriver. tray drip. Move 2. Remove fan motor by pushing fan motor in direction of 5.

  • Page 20: Dispenser

    10. DISPENSER 1) Disconnect funnel and button assembly by pulling down 4) Loosen four screws with a phillips screwdriver and pull the and forward. funnel assembly to disconnect. Funnel Assembly Funnel Botón 2) Remove the display frame pulling out with both hands on one side and repeat the process in the other side while pulling The duct cap assembly can be disconnected if the hold lever it forward like shows the picture.
  • Page 21 7) Dispenser related parts FRAME ASSEMBLY, DISPLAY COVER, DISPLAY DECO, DISPLAY PCB ASSEMBLY, DISPLAY FRAME FUNNEL ASSEMBLY SWITCH FRAME, FUNNEL LEVER DISPENSER (BUTTON) FUNNEL BUTTON LEVER MOTOR ASSEMBLY SPRING HOLDER LEVEL CAP ASSEMBLY, DUCT CAP, DUCT DISPENSER LEVER, (CAP DUCT) RUBBER, CAP DECO, DRAIN - 20 -...

  • Page 22: Micom Function

    5. MICOM FUNCTION 1. MONITOR PANEL ICE PLUS function selection. Filter RESET function selection. Temperature adjustment button for Freezer compartment. Dispensing Selection button (Cubed Ice / Water / Crushed Ice). Temperature adjustment button for Refrigerator compartment. Lock function button. - 21 -...
  • Page 23 1-1. Display 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) When the power initially applied or restored after a power failure, it is set to the previously controlled temperature. Display OFF Mode Demonstration...
  • Page 24 1-4. Lock function (dispenser and display button lock) 1) When the refrigerator is first turned on, the buttons are not locked. The display panel shows the padlock unlocked icon. 2) To lock the display, the dispenser, and the control panel, press, and hold the LOCK button for 3 seconds. The locked pad lock icon is displayed.
  • Page 25 1-8. ICE PLUS 1) The purpose of this function is to intensify the cooling speed of freezer and to increase the amount of ice. 2) Whenever selection switch is pressed, selection/ release, the icon will turn ON or OFF. 3) If there is a power outage and the refrigerator is powered on again, ICE PLUS will be canceled. 4) To activate this function, press the ICE PLUS key and the icon will turn ON.
  • Page 26 1-12. 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 27 1-16. Failure Diagnosis Function To display the error message, press and hold ICE PLUS button and FREEZER button. If no errors are displayed, all LEDs will be illuminated. If a primary or secondary error is present, certain LEDs will be illuminated indicating failure mode. PRODUCT OPERATION STATUS IN FAILURE FAILURE CODE ITEM...
  • Page 28 Failure Diagnosis Function ROOM TEMPERATURE SENSOR ABNORMAL: SECTION TURNS OFF NORMAL: SECTION TURNS ON ICEMAKER SENSOR ABNORMAL: SECTION TURNS OFF NORMAL: SECTION TURNS ON The other display ICEMAKER UNIT FAILURE graphics Turn On ABNORMAL: SECTION TURNS OFF NORMAL: SECTION TURNS ON REFRIGERATOR SENSOR (2) [MIDDLE ROOM] ABNORMAL: SECTION...
  • Page 29 1-17. 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. T est 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 30 1-18. Function of dispenser and water dispenser built-in 1) While any door of refrigerator is open, Ice type function can’t be used. 2) There is 1 dispenser pad, this can be used to dispense cubed ice, crushed ice and water. 3) Press SELECT ICE TYPE button to illuminate your desired option to be dispensed.

  • Page 31: Explanation For Micom Circuit

    6.EXPLANATION FOR MICOM CIRCUIT 1. EXPLANATION FOR PCB 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 32 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 changes, the time calculations of the MICOM will be affected and it might not work at all.
  • Page 33 1-4. Load/dispenser operation, door opening circuit 1. Load Driving Circuit REFRIGERATOR DEFROST LOAD COMPRESSOR AUGER MOTOR SOLENOID CUBE ICE VALVE WATER VALVE LAMP HEATER MEASURING CON 1 CON 1 CON 1 CON 1 CON 2 CON 2 CON 3 CON 4 CON 2 CON 2 CON 3...
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  • Page 35 2. Door opening sensing circuit R36* CON 6 P11_DVO 45 CC15* F-DOOR S/W MICOM CON 7 R52* P21_XTIN 6 CC20* R-DOOR S/W CONNECTOR 6 CONNECTOR 7 F- DOOR S/W R- DOOR S/W 2*RD BO, PK PIN 5&6 PIN 3&4 Measuring Part IC1 (MICOM) PIN 39, 40 Door of Freezer / Refrigerator Closing...
  • Page 36 1-5. Temperature sensing circuit ITEM SENSOR LOCATION COLOR CON5 PIN4,5 2*WH CON6 PIN1,2 2*WH CON6 PIN3,4 2*BO CON7 PIN5,6 2*WH CON7 PIN7,8 2*GY CON8 PIN1,2 2*GY 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.
  • Page 37 1-7. Stepping motor operation circuit CONNECTOR 9 STEPPING MOTOR PIN 9, 10, 11, 12 BL, BK, YL, RD - 36 -...
  • Page 38 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 16 of IC10 (TA7774P). This causes an output of HIGH and LOW signals on MICOM pins 14 and 15. Explanation) The stepping motor is driven by sending signals of 3.33 mSEC via MICOM pins 14, 15, and 16, as shown in the chart below.
  • Page 39 1-8. 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 40 T emperature compensation table at the refrigerator is as follows: Modification resistance 3.3 k 5.6 k 8.2 k 10 k 12 k 18 k 33 k 56 k 180 k Current resistance 0.5 °C 1 °C 1.5 °C 2 °C 2.5 °C 3 °C 3.5 °C...
  • Page 41 1) Sensor resistance characteristics table Cold storage sensor 1&2 Measuring Temperature (°C) Freezing Sensor Frost removal sensor, Outside sensor -20 °C 22.3 k 77 k -15 °C 16.9 k 60 k -15 °C 13.0 k 47.3 k -5 °C 10.1 k 38.4 k 0 °C 7.8 k...
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  • Page 44 TRANS +12V D3SBA60 2013D R3(PRC) 56K,2W 1.3A, 40mH R2(PRC) +16V /630V 560K 1/2W 68uF /450V 1.8K FR107 1/8W RF2* BFS3510A0 9.1KF FR107 PS2561-1 220nF CC3* 1/8W R1(PRC) 68,1/4W R82* 1000uF 330K,1W CC37* /25V FUSE2 6.8K 22uF 1000uF /50V 250V/5A 1/4W /35V CC36* RF3*...
  • Page 45 R28* CON9 4.7K CC10* DUCT DOOR MOTOR IC13* R94* R95* R96* R97* M54563FP 4.7K 4.7K 4.7K 4.7K 4.7K 4.7K D112 D111 D110 D109 D108 D107 CON5 IC14* (ÉÙ 1) (ÉÙ 2) (ÉÙ 3) (ÉÙ 4) (ÉÙ 5) (ÉÙ 6) KID65003AF LD101 LD103 LD105...

  • Page 46: Icemaker And Dispenser Working Principles And Repair

    7. ICEMAKER AND DISPENSER OPERATION AND REPAIRING 1. ICE MAKER OPERATION 1-1. Ice Maker operation 1-2. Dispenser Operation 1. The function is available in models where water and ice are available without opening freezer compartment door. - 45 -...

  • Page 47: Function On Icemaker

    2. FUNCTION OF ICE MAKER 2-1. Initial Control Function Pin No. 44. 2-2. Water Supply Control Function DISP S/W Water Supply Time Note DIP S/W Setting will be depend of water pressure 10.0 11.0 2-3. Icemaking Control Function - 46 -...
  • Page 48 2-4. Ice Ejection Control Function full, ice ejection motor rotates in reverse direction and stops under icemaking or waiting conditions. - 47 -...
  • Page 49 2-5. Test Function 2-6. Other functions relating to freezer compartment door opening - 48 -...

  • Page 50: Icemaker Troubleshooting

    3. ICEMAKER TROUBLESHOOTING It is possible to confirm by pressing freezer and refrigerator temperature control buttons for more than 1 second (icemaker is normal if all LEDs are ON): refer to trouble diagnosis function in MICOM. (Pin No. 22 of IC1) •...

  • Page 51: Icemaker Circuit

    4. ICEMAKER CIRCUIT CON8 RIM1* 16.2KF R58* P62_AIN02 ICE MAKER CE14 CC23* SENSOR 10uF /50V P00_INT0_A3 ICE MAKER CC24* STOP S/W 4.7K ICE MAKER P20_INT5_STOP CC25* TEST S/W R64* HALL P10_TC1 CC26* CE15 100uF R65* R66* /25V 4.7K 4.7K Forward P22_XTOUT Reverse P12_PPG...

  • Page 52: Circuit Diagram

    8. CIRCUIT DIAGRAM CIRCUIT DIAGRAM * P.T.C OPTION * COMP' ACCESSORIES LQ69LAUM LQ69LAUH EG COMP' I/M MOTOR 12 BL 11 PR F-FAN 10 YL HALL COMBO KIT C-FAN (PTC+OLP) I/M TEST S/W F-DOOR ICE MAKER PART STOP S/W * PLUG TYPE, CAPACITOR PART, P.T.C, FUSE-M PERCEPTION S/W AND COMP' ACCESSORIES ON CIRCUIT DIAGRAM I/M SENSOR...
  • Page 53 9. TROUBLE DIAGNOSIS 1. TroubleShooting CLAIMS. CAUSES AND CHECK POINTS. HOW TO CHECK 1) No power at outlet. * Measuring instrument: 1. Faulty start Multi tester 2) No power on cord. Bad connection between adapter and outlet. (faulty adapter) Check the voltage. The Inner diameter of adapter.
  • Page 54 CLAIMS. CAUSES AND CHECK POINTS. HOW TO CHECK 2. No cooling. 2) Refrigeration system is clogged. Heat a clogged evaporator to check it. As soon as the Moisture Residual moisture Air Blowing. Not performed. cracking sound starts, the clogged. in the evaporator. Too short.

  • Page 55: 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. Check visually. Drain path (pipe) clogged. Inject adiabatics into drain Inject through the hose. hole. Seal with drain.
  • Page 56 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 57 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. - Fan misuse. discharge.
  • Page 58 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. 5.
  • Page 59 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 60 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. Bad connection.
  • Page 61 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. Bad rivet contact.
  • Page 62 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. Hinge interference.
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  • Page 76 2-9. MICOM 1. PCB Picture – Main PCB EBR64585304 (2010.01~) CON 201 CON 7 CON 8 - 75 -...
  • Page 77 1. PCB Picture - Display PCB & Sub PCB Display PCB EBR615268 EBR61526802 - 76 -...

  • Page 78: Troubleshooting With Error Display

    2. Troubleshooting With Error Display 1) Abnormal Freezer Sensor Error CHECKING FLOW RESULT & SERVICE ACTION Check for a loose connection in CON6 Result Service Action Firmly plugged Go to Step 2 Loose Unplug connector and check between White to White as is shown in the picture. Result Service Action 0 Ù...
  • Page 79 1) Abnormal Freezer Sensor Error CHECKING FLOW RESULT & SERVICE ACTION 1) Remove the Cover sensor. 2) Cut sensor and stripe terminals. 3) Make a short in striped terminals. 4) Maker measurement. Result Service Action 0 Ù Change the sensor Short Replace Product Open...
  • Page 80 2) Abnormal Refrigerator Sensor Error (1) CHECKING FLOW RESULT & SERVICE ACTION Check for a loose connection in CON7 Result Service Action Firmly plugged Go to Step 2 Loose Unplug connector and check between Result Service Action White to White as is shown in the picture. 0 Ù...
  • Page 81 2) Abnormal Refrigerator Sensor Error (1) CHECKING FLOW RESULT & SERVICE ACTION Unplug connector of Control Box. Go to Step 5. Unplug connector in CON 7 and check between White to White as is shown in the picture. Result Service Action 0 Ù...
  • Page 82 3) Abnormal Refrigerator Sensor Error (2) CHECKING FLOW RESULT & SERVICE ACTION Check for a loose connection. Result Service Action Firmly plugged Go to Step 2 Loose Unplug connector in CON 7 and check between Gray to Gray as is shown in the picture. Result Service Action 0 Ù...
  • Page 83 3) Abnormal Refrigerator Sensor Error (2) CHECKING FLOW RESULT & SERVICE ACTION 1) Remove the Cover sensor. 2) Cut sensor and stripe terminals. 3) Make a short in striped terminals. 4) Maker measurement. Result Service Action Change the sensor 0 Ù Short Open Replace Product...
  • Page 84 4) Abnormal Defrost Sensor Error CHECKING FLOW RESULT & SERVICE ACTION Remove cover PCB, then, check for loose connection in CON6. Result Service Action Firmly plugged Go to Step 2 Loose Unplug connector and check between Orange to Orange as is shown in the picture. Result Service Action 0 Ù...
  • Page 85 5) Abnormal Room Temperature Sensor Error CHECKING FLOW RESULT & SERVICE ACTION Check for a loose connection in CON5. Result Service Action Firmly plugged Go to Step 2 Loose Unplug connector in CON 5 and check between Result Service Action White to White as is shown in the picture.
  • Page 86 6) Abnormal Ice maker Temperature Sensor Error CHECKING FLOW RESULT & SERVICE ACTION Check for a loose connection in CON8 on Main PCB. Result Service Action Firmly plugged Go to Step 2 Loose In Freezer compartment remove Tray ice, remove screw of Ice maker unit, quit Ice maker from holders Result Service Action...
  • Page 87 7) Abnormal Defrost Error CHECKING FLOW RESULT & SERVICE ACTION Check the Door Gasket for any abnormality. Unplug the product, remove Grille Fan assy, and check the Defrost Control Part. Result Service Action 0 Ù Go to Step 3 Fuse-M Change Defrost Controller Assy 48~54 Ù...
  • Page 88 8) Abnormal Ice maker Unit Error CHECKING FLOW RESULT & SERVICE ACTION Remove Cover PCB, then check for any loose connection in CON 8. Result Service Action Firmly plugged Go to Step 2 Loose Remove Tray ice, remove screw of Ice maker unit, quit Ice maker from holders and check for any Result Service Action...
  • Page 89 8) Abnormal Ice maker Unit Error CHECKING FLOW RESULT & SERVICE ACTION Check HALL IC signal in CON 8 Press Ice maker TEST S/W for 3 seconds. Check the change between 0V and 5V in HALL IC signal Result Service Action during Test period.
  • Page 90 9) Abnormal Cooling Fan Error CHECKING FLOW RESULT & SERVICE ACTION Turn Off the product. Remove Cover Machin Room, and check the Result Service Action movement of Cooling Fan Motor manually, feel the rotation condition, then proceed. Tight Abnormal Movement Free Normal Go to Step 3...
  • Page 91 9) Abnormal Cooling Fan Error CHECKING FLOW RESULT & SERVICE ACTION 1) Reset product. Result Service Action 2) Enter to TEST MODE 1 (press once TEST S/W on Main PCB) (a) ~ (b) Normal Change Main PCB (b) ~ (c) Abnormal Change Motor (a) ~ (b) 3) Remove Cover PCB.
  • Page 92 10) Abnormal Freezer Fan Error CHECKING FLOW RESULT & SERVICE ACTION Turn Off the product. Remove Grille Fan Assembly, and check the Result Service Action movement of Freezer Fan Motor manually, feel the rotation condition, then proceed. Tight Abnormal Movement Free Normal Go to Step 3...
  • Page 93 10) Abnormal Freezer Fan Error CHECKING FLOW RESULT & SERVICE ACTION 1) Reset product. Result Service Action 2) Remove Cover PCB. 3) Enter to TEST MODE 1 (press once TEST S/W (a) ~ (b) Below 10V Change Main PCB on Main PCB) (b) ~ (c) Go to Step 6 0V or 5V...
  • Page 94 2. Troubleshooting With Error Display 11) Ice Cube Mode is not working CHECKING FLOW RESULT & SERVICE ACTION Check Lever S/W signal in CON 4. Lever S/W Service Action 0 Vac Go to Step 2 Pressing Other Change PCB 50~70 Vac Go to Step 2 Not Pressing Other...
  • Page 95 11) Ice Cube Mode is not working CHECKING FLOW RESULT & SERVICE ACTION Remove Cover dispenser, then check for any Result Service Action loose connection in Duct motor. Firmly plugged Go to Step 6 Loose Unplug connector from Duct motor and check the Result Service Action resistance value.
  • Page 96 11) Ice Cube Mode is not working CHECKING FLOW RESULT & SERVICE ACTION Result Remove Cover hinge in Freezer Door, and check Service Action connection. Firmly plugged Go to Step 9 Loose Disconnect joint 1 as is marked in the picture. Result Service Action 0 Ù...
  • Page 97 12) Ice Crush Mode is not working CHECKING FLOW RESULT & SERVICE ACTION Check Lever S/W signal in CON 4. Lever S/W Service Action 0 Vac Go to Step 2 Pressing Other Change PCB 50~70 Vac Go to Step 2 Not Pressing Other Change PCB...
  • Page 98 12) Ice Crush Mode is not working CHECKING FLOW RESULT & SERVICE ACTION Unplug connector from Duct motor and check the resistance value. Result Service Action 9.9 ~12.1 Ù Go to Step 6 Other Replace Duct Motor Check Duct Motor signal in CON 9. Lever S/W Service Action +/- 12Vdc...
  • Page 99 12) Ice Crush Mode is not working CHECKING FLOW RESULT & SERVICE ACTION Disconnect joint 1 as is marked in the picture. Result Service Action 0 Ù Replace Product Then check resistance value marked points. Go to Step 9 Unplug connector from Duct Motor and check the resistance value in the connector.
  • Page 100 13) Water dispensing mode is not working CHECKING FLOW RESULT & SERVICE ACTION Check for loose connections in Main PCB CON 3 & Result Service Action CON 4, also check in Machine Room the Valve Assy connector. Firmly plugged Go to Step 2 Loose Check Lever S/W signal in CON 4.
  • Page 101 14) Freezer Lamp is not working CHECKING FLOW RESULT & SERVICE ACTION Check the Freezer Door S/W activating movement. Result Service Action Tight Abnormal Change Door S/W movement Free Normal Go to Step 2 movement Check for any loose connection in Freezer Door S/W. Result Service Action Firmly plugged...
  • Page 102 14) Freezer Lamp is not working CHECKING FLOW RESULT & SERVICE ACTION 1) Press and hold Freezer Door S/W. Result Service Action 2) Replace Lamp Bulb by a new piece. 3) Release Door S/W. Explain to customer 4) Check the result. Go to Step 6 Remove Cover PCB, then, check voltage from Result...
  • Page 103 15) Refrigerator Lamp is not working CHECKING FLOW RESULT & SERVICE ACTION Reset Refrigerator. Check the Refrigerator Door S/W activating Result Service Action movement. Tight Abnormal Change Door S/W movement Free Normal Go to Step 2 movement Check for any loose connection in Refrigerator Door S/W.
  • Page 104 15) Refrigerator Lamp is not working CHECKING FLOW RESULT & SERVICE ACTION Identify the problem. Which lamp bulb is failing? Result Service Action Upper Go to Step 7 Lower Replace Lamp Bulb Both Go to Step 8 Remove Refrigerator Control Box, then check for any Result Service Action loose connection.
  • Page 105 16) Poor Cooling in Refrigerator section CHECKING FLOW RESULT & SERVICE ACTION Check the conditions of gasket in refrigerator door Result Service Action (gaps, damage, deformed). Go to Step 2 Fix up (if possible) or Abnormal change the Gasket Check the sensor resistance value in CON 7. Refer to temperature chart for Refrigerator Sensor.
  • Page 106 16) Poor Cooling in Refrigerator section CHECKING FLOW RESULT & SERVICE ACTION 1) Turn Off the refrigerator. Result Service Action 2) Remove Grille Fan assembly, and check the movement of Freezer Fan Motor manually, feel Replace Freezer Fan Tight movement the rotation condition, then proceed.
  • Page 107 16) Poor Cooling in Refrigerator section CHECKING FLOW RESULT & SERVICE ACTION 1) Unplug Damper Motor 2) Check the Damper Motor impedance. Result Service Action 369 ~ 451Ù Change PCB Other Change Damper Change PCB 369 ~ 451Ù Other Change Damper 129.6~158.4Ù...
  • Page 108 17) Poor Cooling in Freezer section CHECKING FLOW RESULT & SERVICE ACTION Check the conditions of gasket in freezer door Result Service Action (gaps, damage, deformed). Go to Step 2 Fix up (if possible) or Abnormal change the Gasket Check the sensor resistance value in CON 6. Refer to temperature chart for Refrigerator Sensor.
  • Page 109 17) Poor Cooling in Freezer section CHECKING FLOW RESULT & SERVICE ACTION 1) Turn Off the refrigerator. Result Service Action 2) Remove Grille Fan assembly, and check the movement of Freezer Fan Motor manually, feel Replace Freezer Fan Tight movement the rotation condition, then proceed.
  • Page 110 17) Poor Cooling in Freezer section CHECKING FLOW RESULT & SERVICE ACTION 1) Unplug Damper Motor 2) Check the Damper Motor impedance. Result Service Action 369 ~ 451Ù Change PCB Other Change Damper Change PCB 369 ~ 451Ù Other Change Damper 129.6~158.4Ù...
  • Page 111 18) Over cooling in Refrigerator section CHECKING FLOW RESULT & SERVICE ACTION Refer to Temperature chart for Refrigerator Sensor. Check the sensor resistance value in CON 7. Result Service Action Go to Step 2 Check Section 3 Abnormal Abnormal Refrigerator Sensor Enter to TEST MODE 1 (Press once the TEST S/W Go to Step 3 in Main PCB).
  • Page 112 18) Over cooling in Refrigerator section CHECKING FLOW RESULT & SERVICE ACTION Remove the EPS duct carefully (without disconnect). Result Service Action Look for damper baffle and check the movement by entering to TEST MODE 1 (Press once) and TES Open Normal TEST...
  • Page 113 19) Over cooling in Freezer section CHECKING FLOW RESULT & SERVICE ACTION Refer to temperature chart for Refrigerator Sensor. Check the sensor resistance value in CON 7. Result Service Action Go to Step 2 Check Section 3, Abnormal Abnormal Freezer Sensor.
  • Page 114 20) Refrigerator apparently doesn’t work CHECKING FLOW RESULT & SERVICE ACTION Lamps are working? Result Service Action Go to Step 2 Go to Step 4 Refrigerator and Freezer notch indicator are in Result Service Action OFF position? Go to Step 3 Refer to Poor Cooling section Open the refrigerator door, then, in Display press...
  • Page 115 20) Refrigerator apparently doesn’t work CHECKING FLOW RESULT & SERVICE ACTION Check voltage signals of 12 Vdc and 16 Vdc. Result Service Action 15.5~16.5 Vdc Go to test 12V signal signal Other Replace PCB 11.7~ 12.3 Vdc go to Step 7 signal Other Replace PCB...
  • Page 116 21) Door open alarm never stops CHECKING FLOW RESULT & SERVICE ACTION Open refrigerator door, then, check manually the Result Service Action door S/W movement. Tight movement Replace Door S/W Free movement Go to Step 2 Remove cover hinge in refrigerator door, check the measurement in Door S/W DC part as is shown in the picture.
  • Page 117 22) Refrigerator is not dispensing ice CHECKING FLOW RESULT & SERVICE ACTION Check for Ice maker power S/W status. Result Service Action Go to Step 2 Turn ON, explain to customer Check the water supply connection to outlet. Result Service Action Go to Step 3 Fix problem, Without Supply...
  • Page 118 22) Refrigerator is not dispensing ice CHECKING FLOW RESULT & SERVICE ACTION 1) Check voltage in CON 3 and CON 4 as is shown Result Service Action in the picture (ICE VALVE). Go to Step 5 110~127 Vac Other Replace Main PCB CON 3 CON 4 3) Execute TEST MODE in Ice maker as is shown in...

  • Page 119: Test Mode

    4. Appendix 23) Entering to the Test Mode How to make TEST MODE TEST MODE 1 If refrigerator is in NORMAL MODE, press once TEST S/W in Main PCB. Display Response in TEST MODE 1 TEST S/W on Main PCB If any error is present, you can not enter to TEST MODE.
  • Page 120 23) Entering to the Test Mode How to make DISPLAY CHECK MODE In order to check hidden error codes, or Display functionality. To enter to this mode, press simultaneously “ULTRA ICE” button and “FRZ TEMP” button for more than 5 seconds. If no are errors detected, all LED’s will be turned ON, otherwise, error code will be displayed.
  • Page 121 25) Temperature Charts Temperature Chart #1 Temperature Chart #2 Voltage Voltage Temperature Resistance KÙ Temperature Resistance KÙ -40°F / (-40°C) -40°F / (-40°C) 73.29 4.10 225.10 4.48 -31°F / (-35°C) -31°F / (-35°C) 53.63 3.84 169.80 4.33 -22°F / (-30°C) -22°F / (-30°C) 39.66 3.55...
  • Page 122 3. SEALED SYSTEM HEAVY REPAIR 3-1. Summary of heavy repair ,Gas welder - 121 -...
  • Page 123 3-2. Precautions During Heavy Repair Suction Low Pressure side (compressor Capillary Tube service tube) Discharge tube 1) Be sure to replace drier (every time when is repaired the cycle and refrigerant is recharged) - 122 -...
  • Page 124 3-3. Practical Work For Heavy Repair Items Precautions 1. Removal of residual refrigerant. Suction KEY POINT Observe the sequence for removal of refrigerant. (If not, compressor oil may Capillary leak.) Tube Service tube Discharge tube 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 125 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 system.
  • Page 126 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 127 3-5. Brazing Reference Drawings Pipe Assembly, Hot Line (Freezer) Cooper Brazing Silver Brazing Copper Brazing Capi-tube Drier assembly Silver Brazing Pipe assembly, suction Pipe Assembly, Joint Copper Brazing Pipe assembly, Condenser Assembly, wire joint Silver Brazing Copper Brazing Copper Brazing Copper Brazing - 126 -...
  • Page 128 4. HOW TO DEAL WITH CLAIMS 4-1. Sound - 127 -...
  • Page 129 - 128 -...
  • Page 130 4-2. Measures for Symptoms on Temperature - 129 -...
  • Page 131 4-3. Odor and Frost - 130 -...
  • Page 132 4-4. Others - 131 -...

  • Page 133: Exploded View

    #EV# 10.EXPLODED VIEW FREEZER DOOR 200A 203A 201A 241F 212J 244B 241G 241G 241G 243A -132-...
  • Page 134 #EV# REFRIGERATOR DOOR 241A 241C 230A 241B 233A 231A 212G 241D 212J 241H 244A 241H 243B 241H -133-...
  • Page 135 #EV# FREEZER COMPARTMENT 281A 332A 271B 271A 330B 409B 405G 610E 404A 158C 405A 329A 903E 316B 301A 103F 128E 149A 128F 401A 149A 149A 281G 103E 106A 332B 418A 103C 319B 136A -134-...
  • Page 136 #EV# REFRIGERATOR COMPARTMENT 140A 281B 271B 271C 141A 128G 611A 140B 611B 128H 120A 120B 412C 903D 611E 170A 409B 610E 158A 140A 281K 281H 161A 151A 158B 154A 106A 151B -135-...
  • Page 137 #EV# ICE &WATER PARTS 622B 625A 616E 627D 616D 627D 627C 625B 627B 627A 615A 412A 612A 612C 619A 131C 612B 600A 149D 607A 128L 149E 412B 614A 110B 621B 606A -136-...
  • Page 138 #EV# MECHANICAL COMPARTMENT 501F 103B 411A 410G 308A 410H 310A 309A 412D 501A 103A 304A 316A 307A 419B 314A 317A 328A 323B 105A 412D 312A 319C 329C 405F 404B 305B 315A 419A 405C 305C 319E 319A 105F 305C 305B -137-...
  • Page 139 #EV# DISPENSER PARTS 278A 161C 113G 113E 282G 405H 113F 501B 279A 279B 276B 278G 281F 280A -138-...
  • Page 140 MFL62215918 December, 2010...

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