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LG GR-L208NN Service Manual

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REFRIGERATOR
SERVICE MANUAL
CAUTION
PLEASE READ CAREFULLY THE SAFETY PRECAUTIONS OF THIS BOOK
BEFORE CHECKING OR OPERATING THE REFRIGERATOR.
MODEL: GR-L208NN/GR-L248NN
Ref. No.
GR-L207TRA
GR-L207TRA
http://biz.lgservice.com
COLOR: TITANIUM

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Summary of Contents for LG GR-L208NN

  • Page 1 REFRIGERATOR SERVICE MANUAL CAUTION PLEASE READ CAREFULLY THE SAFETY PRECAUTIONS OF THIS BOOK BEFORE CHECKING OR OPERATING THE REFRIGERATOR. Ref. No. GR-L207TRA GR-L207TRA MODEL: GR-L208NN/GR-L248NN COLOR: TITANIUM...

  • Page 2: Table Of Contents

    CONTENTS WARNINGS AND PRECAUTIONS FOR SAFETY ........................ 3 SPECIFICATIONS................................... 4 PARTS IDENTIFICATION ..............................12 HOW TO INSTALL THE REFRIGERATOR .......................... 18 HOW TO ADJUST DOOR HEIGHT OF THE REFRIGERATOR ..................18 HOW TO INSTALL WATER PIPE............................19 HOW TO CONTROL THE AMOUNT OF WATER SUPPLIED TO THE ICEMAKER ............23 MICOM FUNCTION ................................

  • Page 3: Warnings And Precautions For Safety

    WARNINGS AND PRECAUTIONS FOR SAFETY Please observe the following safety precautions in order to 8. Do not fray, damage, machine, heavily bend, pull out, use safely and correctly the refrigerator and to prevent or twist the power cord. accident and danger during repair. 9.

  • Page 4: Specifications

    SPECIFICATIONS 1. Ref No. : GR-P247 ITEMS SPECIFICATIONS ITEMS SPECIFICATIONS DIMENSIONS (mm) 890(W) 840(D) 1750(H) FIRST DEFROST 4 - 5 Hours NET WEIGHT (kg) DEFROST CYCLE 13 - 15 Hours COOLING SYSTEM Fan Cooling DEFROSTING DEVICE Heater, Sheath TEMPERATURE CONTROL Micom Control Heater, L - Cord DEFROSTING SYSTEM...
  • Page 5 SPECIFICATIONS 2. Ref No. : GR-P207 ITEMS SPECIFICATIONS ITEMS SPECIFICATIONS DIMENSIONS (mm) 890(W) 755(D) 1750(H) FIRST DEFROST 4 - 5 Hours NET WEIGHT (kg) DEFROST CYCLE 13 - 15 Hours COOLING SYSTEM Fan Cooling DEFROSTING DEVICE Heater, Sheath TEMPERATURE CONTROL Micom Control Heater, L - Cord DEFROSTING SYSTEM...
  • Page 6 SPECIFICATIONS 3. Ref No. : GR-L247 ITEMS SPECIFICATIONS ITEMS SPECIFICATIONS DIMENSIONS (mm) 890(W) 840(D) 1750(H) CAPILLARY TUBE MOLECULAR SIEVE XH-7 NET WEIGHT (kg) FIRST DEFROST 4 - 5 Hours COOLING SYSTEM Fan Cooling DEFROST CYCLE 13 - 15 Hours TEMPERATURE CONTROL Micom Control DEFROSTING DEVICE Heater, Sheath...
  • Page 7 SPECIFICATIONS 4. Ref No. : GR-L207 ITEMS SPECIFICATIONS ITEMS SPECIFICATIONS DIMENSIONS (mm) 890(W) 755(D) 1750(H) CAPILLARY TUBE MOLECULAR SIEVE XH-7 NET WEIGHT (kg) FIRST DEFROST 4 - 5 Hours COOLING SYSTEM Fan Cooling DEFROST CYCLE 13 - 15 Hours TEMPERATURE CONTROL Micom Control DEFROSTING DEVICE Heater, Sheath...
  • Page 8 SPECIFICATIONS 1. Ref No. : GR-C247 ITEMS SPECIFICATIONS ITEMS SPECIFICATIONS DIMENSIONS (mm) 890(W) 840(D) 1750(H) FIRST DEFROST 4 - 5 Hours NET WEIGHT (kg) DEFROST CYCLE 13 - 15 Hours COOLING SYSTEM Fan Cooling DEFROSTING DEVICE Heater, Sheath TEMPERATURE CONTROL Micom Control Heater, L - Cord DEFROSTING SYSTEM...
  • Page 9 SPECIFICATIONS 2. Ref No. : GR-C207 ITEMS SPECIFICATIONS ITEMS SPECIFICATIONS DIMENSIONS (mm) 890(W) 755(D) 1750(H) FIRST DEFROST 4 - 5 Hours NET WEIGHT (kg) DEFROST CYCLE 13 - 15 Hours COOLING SYSTEM Fan Cooling DEFROSTING DEVICE Heater, Sheath TEMPERATURE CONTROL Micom Control Heater, L - Cord DEFROSTING SYSTEM...
  • Page 10 SPECIFICATIONS 3. Ref No. : GR-B247 ITEMS SPECIFICATIONS ITEMS SPECIFICATIONS DIMENSIONS (mm) 890(W) 840(D) 1750(H) CAPILLARY TUBE MOLECULAR SIEVE XH-7 NET WEIGHT (kg) FIRST DEFROST 4 - 5 Hours COOLING SYSTEM Fan Cooling DEFROST CYCLE 13 - 15 Hours TEMPERATURE CONTROL Micom Control DEFROSTING DEVICE Heater, Sheath...
  • Page 11 SPECIFICATIONS 4. Ref No. : GR-B207 ITEMS SPECIFICATIONS ITEMS SPECIFICATIONS DIMENSIONS (mm) 890(W) 755(D) 1750(H) CAPILLARY TUBE MOLECULAR SIEVE XH-7 NET WEIGHT (kg) FIRST DEFROST 4 - 5 Hours COOLING SYSTEM Fan Cooling DEFROST CYCLE 13 - 15 Hours TEMPERATURE CONTROL Micom Control DEFROSTING DEVICE Heater, Sheath...

  • Page 12: Parts Identification

    PARTS IDENTIFICATION 1. Ref No. : GR-P247ER, GR-P207ER Cover Hinge Cover PWB Frame Display Water Tube Dispenser Lamp Ice & Water Dispenser Button Home Bar Freezer Refrigerator Compartment Compartment Milk product corner Door rack Lamp Shelf Automatic Door rack ice maker Wine holder (optional) Lamp Egg Box...
  • Page 13 PARTS IDENTIFICATION 2. Ref No. : GR-P247EQ, GR-P207EQ Cover Hinge Cover PWB Frame Display Water Tube Dispenser Lamp Ice & Water Dispenser Button Home Bar Freezer Refrigerator Compartment Compartment Milk product corner Door rack Lamp Shelf Automatic Door rack ice maker Wine holder (optional) Lamp Egg Box...
  • Page 14 PARTS IDENTIFICATION 3. Ref No. : GR-L247ER, GR-L207ER Cover Hinge Cover PWB Frame Display Water Tube Dispenser Lamp Ice & Water Dispenser Button Freezer Refrigerator Compartment Compartment Milk product corner Door rack Lamp Shelf Automatic Door rack ice maker Wine holder (optional) Lamp Egg Box Snack drawer...
  • Page 15 PARTS IDENTIFICATION 4. Ref No. : GR-L247EQ, GR-L207EQ Cover Hinge Cover PWB Frame Display Water Tube Dispenser Lamp Ice & Water Dispenser Button Freezer Refrigerator Compartment Compartment Milk product corner Door rack Lamp Shelf Automatic Door rack ice maker Wine holder (optional) Lamp Egg Box Snack drawer...
  • Page 16 PARTS IDENTIFICATION 1. Ref No. : GR-C247EC, GR-C207EC Cover Hinge Cover PWB Home Bar Freezer Refrigerator Compartment Compartment Milk product corner Door rack Lamp Shelf Ice Bank Assy Door rack Wine holder (optional) Lamp Egg Box Snack drawer Shelf (Steel, Refreshment center T/Glass) (optional)
  • Page 17 PARTS IDENTIFICATION 3. Ref No. : GR-B247, GR-B207 Cover Hinge Cover PWB Freezer Refrigerator Compartment Compartment Milk product corner Door rack Lamp Shelf Ice Bank Assy Door rack Wine holder (optional) Lamp Egg Box Snack drawer Shelf (Steel, T/Glass) Shelf Drawer or Shelf (optional)

  • Page 18: How To Install The Refrigerator

    HOW TO INSTALL REFRIGERATOR 1. How to Adjust Door Height of Refrigerator Make the refrigerator level first. (If the refrigerator is not installed on the flat floor, the height of freezer and refrigerator door may not be the same.) 1. If the height of freezer door is lower than that of 2.

  • Page 19: How To Install Water Pipe

    HOW TO INSTALL REFRIGERATOR 2. How to Install Water Pipe 2-1. When connecting directly to the water tap. Please confirm the following installation parts. Before Installation 1. The icemaker requires the water pressure of 1.5 - 8.5kgf/cm . (It is acceptable if city water fills a cup of 180cc with water for 3 seconds) 2.
  • Page 20 HOW TO INSTALL REFRIGERATOR 1. Connection of Pipe Connector A and B. Caution : • Feed pipe should be connected to cold water line. If it is connected to hot water line, trouble 1) Turn off main valve of water pipe. may occur.
  • Page 21 HOW TO INSTALL REFRIGERATOR 3. When customer uses bottled water. *If customer wants to use bottled water, extra pump should be installed as shown below. 1. The pump system should not be on the floor (it may cause noise and vibration). Securely fasten the inlet and outlet nuts of pump.
  • Page 22 HOW TO INSTALL REFRIGERATOR Install Water Filter (Applicable to some models only) Before Installing water filter Control box 1. Before installing the filter, take out the top shelf of the refrigerator after tilting it to the direction ( ) and lifting it to the direction ( ) and move it to the lower part.

  • Page 23: How To Control The Amount Of Water Supplied To The Icemaker

    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 bank in the upper part of the freezer compartment. Caution : • Do not put hands or tools into the chute to confirm the operation of geared motor.
  • Page 24 HOW TO INSTALL REFRIGERATOR 3-2. Control the amount of water supplied to the Caution : When adjusting the amount of water supplied, adjust step by step. Otherwise the water may icemaker. spill over. 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.

  • Page 25: Micom Function

    MICOM FUNCTION 1. Monitor Panel 1-1. GR-P247, GR-P207, GR-L247, GR-L207 1-2. GR-C247, GR-C207, GR-B247, GR-B207 Function Monitor Temp Temp SELECT Temp Temp Freezer compartment Refrigerator compartment Dispenser selection button temperature control Button temperature control Button 2. Description of Function 2-1. Funnction of Temperature Selection Division Power Initially On 1st Press...
  • Page 26 MICOM FUNCTION 2-2. Automatic ice maker • The automatic ice maker can automatically make 8 pieces of ice cube at a time, 80 pieces a day. But these quantities may be varied according to various conditions including how many times the refrigerator door opens and closes. •...
  • Page 27 MICOM FUNCTION 2-4. Control of variable type of freezing room 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 special freezing operation or load response operation for the high speed of RPM and operates in the standard RPM in other general operation.
  • Page 28 MICOM FUNCTION 2-9. Frost removal function 1. Frost removal is performed whenever total operation time of compressor becomes 7 ~ 7.5 hour. 2. In providing initial power (or returning power failure), frost removal starts whenever total operation time of compressor becomes 4 ~ 4.5 hour.
  • Page 29 MICOM FUNCTION 2-15. 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 and only alarm sound (“Ding~”) rings. 3.
  • Page 30 MICOM FUNCTION Note1) The abnormality of RT-Sensor, R2-Sensor Icemaker Unit, and Icemaker-Sensor is not indicated in trouble code but it is indicated when checking LED (when pressing both freezer temperature control button and refrigerator temperature control button for more than 1 second at the same time). RT-Sensor Normal : A LED on, Abnormal : A LED Off.

  • Page 31: Explation For Micom Circuit

    EXPLATION FOR MICOM CIRCUIT 1. Explanation for PWB circuit 1-1. Power circuit 1. GR-L207ERA, GR-L247ERA, GR-B207ERA, GR-B247ERA Power circuit consists of SMPS (SWITCHING MODE POWER SUPPLY) power. The SMPS consist of the rectifying part (BD1, CE1) converting AC voltage to DC voltage, the switching part (IC2) switching the converted DC voltage, transformer transferring energy of the primary side of the switching terminal to the secondary side and the feedback part (IC3, IC4) transferring it to the primary side.
  • Page 32 EXPLATION FOR MICOM CIRCUIT 1-2. Oscillation circuit Oscillation circuit is a circuit with the purpose of generating basic time for clock occurrence for synchronization and time calculation in relation with information transmission/reception of inside elements of IC1 (MICOM). The OSC1 must always use rated parts since if SPEC is changed, time calculated at the IC1 may be changed or no operation is done.
  • Page 33 EXPLATION FOR MICOM CIRCUIT 1-4. Load/dispenser operation, buzzer driving, door opening circuit 1. LOAD DRIVING CIRCUIT InEven if opening the door of freezing room or cold storage room during operation of fan motor at the freezing room, this circuit does not stop and operates at the standard RPM. In addition, if doors of freezing room or cold storage room, the fan motor normally operates at the RPM previously operated.
  • Page 34 EXPLATION FOR MICOM CIRCUIT 2) GR-B207ERA, GR-B247ERA The fan motor at the freezing room does not stop but operates if opening doors of the freezing room or cold storage room or the home bar during operation of the fan motor at the freezing room. (A), (B), (C) and (D) of door switch for the freezing room or cold storage room are connected to the door open sensing circuit toward both ends of switch to determine door open at MICOM.
  • Page 35 EXPLATION FOR MICOM CIRCUIT 2. Dispenser operation circuit 1) Check load driving status WATER VALVE GEARED SOLENOID SOLENOID HOME BAR SOLENOID Type of Load MOTOR CUBE DISPENSER HEATER PILOT WATER Measuring part IC6-No.13 IC6-No.12 IC6-No.11 IC6-No.10 No.12 No.10 No.16 Within 1 V Status 12 V 2) Lever S/W sensing circuit...
  • Page 36 EXPLATION FOR MICOM CIRCUIT 3. Door opening sensing circuit <GR-L207ERA, GR-L247ERA> <GR-B207ERA, GR-B247ERA> CONDITIONS Bell sounds when button on Beep sounds when warning dosplay is pressed. door opening. MEASURING POINTS 0.05 s 0.2 s 0.1 s 0.4 s 0.5 s 0.5 s IC1 (No.
  • Page 37 EXPLATION FOR MICOM CIRCUIT 1-5. Temperature sensing circuit 1) GR-L207ERA, GR-L247ERA The above circuits are circuits attached to freezing room sensor or cold storage room sensor for adjusting setting temperature at the freezing room and cold storage room, ice-making sensor for sensing water temperature in ice-making, or an evaporator for sensing temperature of a frost removal sensor necessary for frost removal.
  • Page 38 EXPLATION FOR MICOM CIRCUIT 2) GR-B207ERA, GR-B247ERA The above circuits are circuits attached to freezing room sensor or cold storage room sensor for adjusting setting temperature at the freezing room and cold storage room, ice-making sensor for sensing water temperature in ice-making, or an evaporator for sensing temperature of a frost removal sensor necessary for frost removal.
  • Page 39 EXPLATION FOR MICOM CIRCUIT 1-6. Switch entry circuit The following circuits are entry circuits for sensing signal form test S/W, electronic single motor damper reed S/W for examining refrigerator. 1) GR-L207ERA, GR-L247ERA 2) GR-B207ERA, GR-B247ERA 1-7. Option designation circuit (model separation function) 1) GR-L207ERA, GR-L247ERA 2) GR-B207ERA, GR-B247ERA The above circuits are used for designating separation by model as option and notifying it to MICOM.
  • Page 40 EXPLATION FOR MICOM CIRCUIT 1-8. Stepping motor operation circuit For motor driving method, rotation magnetism is formed at coils wound on each phase of motor and stator and so motor becomes to rotate if applying “High” signal to the IC8 (TA777AF) at the MICOM PIN 33 and outputting “High”, “Low” signal by step numbers fixed through MICOM PIN 34 and 35,.
  • Page 41 EXPLATION FOR MICOM CIRCUIT 1-9. Fan motor driving circuit (freezing room, M/C room) 1. This circuit performs function to make standby power ‘0’ by cutting off power supplied to ICs inside of the fan motor in the fan motor OFF. 2.
  • Page 42 EXPLATION FOR MICOM CIRCUIT 2) GR-B207ERA, GR-B247ERA - 42 -...
  • Page 43 EXPLATION FOR MICOM CIRCUIT 1-10. Temperature compensation and over-cool/weak-cool compensation circuit 1. Temperature compensation at freezing room, cold storage room 1) GR-L207ERA, GR-L247ERA 2) GR-B207ERA, GR-B247ERA Freezing room Cold storage room Resistance value Temperature Resistance value Temperature Remarks (RCF1) compensation (RCR1) compensation 180 kΩ...
  • Page 44 EXPLATION FOR MICOM CIRCUIT u Temperature compensation table at the cold storage room 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...
  • Page 45 EXPLATION FOR MICOM CIRCUIT 1-11. Key Button Input and Display Lighting Circuit 1. GR-P247, GR-P207, GR-L247, GR-L207 This circuit is to judge the work of function control button on the operation panel and to light each function indication led (LED module). It is driven by SCAN method. SELECT TEMP TEMP...

  • Page 46: Compensation Circuit For Weak-Cold, Over-Cold At Freezing Room

    EXPLATION FOR MICOM CIRCUIT 2. Compensation circuit for weak-cold, over-cold at freezing room 1) GR-L207ERA, GR-L247ERA 2) GR-B207ERA, GR-B247ERA Temperature compensation in CUT JCR1 +1 °C +2 °C JCR2 +1 °C JCR3 -1 °C -2 °C JCR4 -1 °C Compensation Compensation Temperature compensation value for weak-cold...

  • Page 47: Pwb Parts Drawing And List

    EXPLATION FOR MICOM CIRCUIT 3. PWB parts diagram and list 3-1. PWB Ass’y, main part diagram 1. GR-L207ERA, GR-L247ERA - 47 -...
  • Page 48 EXPLATION FOR MICOM CIRCUIT 2. GR-B207ERA, GR-B247ERA - 48 -...
  • Page 49 EXPLATION FOR MICOM CIRCUIT 3-2. Parts list 1. GR-L207ERA, GR-L247ERA - 49 -...
  • Page 50 EXPLATION FOR MICOM CIRCUIT - 50 -...
  • Page 51 EXPLATION FOR MICOM CIRCUIT 2. GR-B207ERA, GR-B247ERA - 51 -...
  • Page 52 EXPLATION FOR MICOM CIRCUIT - 52 -...

  • Page 53: Pwb Circuit Diagram

    EXPLATION FOR MICOM CIRCUIT 4. PWB circuit diagram - PWB circuit diagram may vary a little bit depending on actual condition. 1. GR-L207ERA, GR-L247ERA - 53 -...
  • Page 54 EXPLATION FOR MICOM CIRCUIT - 54 -...
  • Page 55 EXPLATION FOR MICOM CIRCUIT 2. GR-B207ERA, GR-B247ERA - 55 -...
  • Page 56 EXPLATION FOR MICOM CIRCUIT - 56 -...

  • Page 57: Ice Maker And Dispenser Operation Principle And Repair Method

    ICE MAKER AND DISPENSER OPERATION PRINCIPLE AND REPAIR METHOD 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 58: Function Of Ice Maker

    ICE MAKER AND DISPENSER OPERATION PRINCIPLE AND REPAIR METHOD 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.
  • Page 59 ICE MAKER AND DISPENSER OPERATION PRINCIPLE AND REPAIR METHOD 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 60 ICE MAKER AND DISPENSER OPERATION PRINCIPLE AND REPAIR METHOD 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 61: Ice Maker Troubleshooting

    ICE MAKER AND DISPENSER OPERATION PRINCIPLE AND REPAIR METHOD 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 18) Is DC Power (5V and 12V) Failed DC Power...

  • Page 62: Ice Maker Circuit Part

    ICE MAKER AND DISPENSER OPERATION PRINCIPLE AND REPAIR METHOD 4. Ice maker circuit part The above ice maker circuit is applied to the R S65DQG/DSG, R-S65DRG and consists of the ice maker unit part installed at the freezing room and the ice maker driving part of the main PWB. Water supply to the ice maker container is done by opening the valve for the established water supply time by operating the container via a solenoid relay for the ice valve of the solenoid valve placed at the M/C room.

  • Page 63: Circuit

    CIRCUIT - 63 -...
  • Page 64 CIRCUIT - 64 -...

  • Page 65: Trouble Diagnosis

    TROUBLE DIAGNOSIS 1. TROUBLE SHOOTING CLAIMS. CAUSES AND CHECK POINTS. HOW TO CHECK * Measuring instrument : 1) No power on outlet. 1. Faulty start Multi tester 2) No power on cord. Bad connection between adapter and outlet. (faulty adapter) Check the voltage.
  • Page 66 TROUBLE DIAGNOSIS CLAIMS. CAUSES AND CHECK POINTS. HOW TO CHECK 2. No cooling. 2) Refrigeration system is clogged. Check the clogged evaporator by heating (as Moisture Residual moisture Air Blowing. Not performed. soon as the cracking sound clogged. in the evaporator. Too short.
  • Page 67 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 P/U into drain hose. Inject through the hole.
  • Page 68 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 - rated. Heater cord-L - rated. Bad heater assembly. Heater plate No contact to drain. Loosened stopper cord.
  • Page 69 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 70 TROUBLE DIAGNOSIS CLAIMS. CAUSES AND CHECK POINTS. HOW TO CHECK 4. Warm 1) Colgged cooling path. refrigerator P/U liquid leak. compartment Foreign materials. –– P/U dump liquid. temperature. 2) Food storate. Store hot food. Store too much at once. Door open. Packages block air flow.
  • Page 71 TROUBLE DIAGNOSIS CLAIMS. CAUSES AND CHECK POINTS. HOW TO CHECK 6. Dew and 4) Dew on door. ice formation. Dew on the duct door. - Duct door heater is cut. Dew on the dispense Recess Heater is cut. recess. Duct door is open. / Foreign material clogging. Dew on the door surface.
  • Page 72 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 73 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 74 TROUBLE DIAGNOSIS CLAIMS. CAUSES AND CHECK POINTS. HOW TO CHECK 10. Structure, 1) Door foam. appearance Sag. Weak torque of Bolt is loosened during and others. hinge connection. transportaion. Not tightly fastened. Screw worn out . Weak gasket Adhesion surface. adhesion.

  • Page 75: 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 76 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 77 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 78 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 79 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 80 Problems Causes Checks Measures Remarks No defrosting Melting fuse blows out. - 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 81 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 82 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 colgged in the freezer visually.(Check clogging at intake - Check defrost (Check ice on the to defrosting if the...
  • Page 83 2-7. Sound Problems Causes Checks Measures Remarks "Whizz" sound 1. Loud sound of compressor 1.1 Check the level of the 1) Maintain horizontal level. operation. refrigerator. 2) Replace rubber and seat if they 1.2 Check the rubber seat are sagged and aged. conditions (sagging and aging).
  • Page 84 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 ("Cluck") the refrigerator. shelves in the refrigerator and insert foam or cushion where 2. Pipes interference and capillary 1-2.
  • Page 85 Problems Causes Checks Measures Remarks Sound "Burping" 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 86 2-8. Odor Problems Causes Checks Measures Remarks Food Odor. Food (garlic, kimchi, etc) - Check the food is not wrapped. - Dry deodorizer in the shiny and - Check the shelves or inner windy place. wall are stained with food juice. - Store the food in the closed - Check the food in the vinyl wraps.
  • Page 87 2-9. Micom Problems Symptom Causes Checks Measures Remarks Bad PCB All display Bad connection Bad connector Visual check on connector Reconnect electric power. LEDS are off. between Main PCB connection from main connection. connector. and display circuit. PCB to display PCB. Defective PCB trans.
  • Page 88 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 CON5 Replace relay(RY1 Refer to load driving relay.
  • Page 89 Problems Symptom Causes Checks Measures Remarks Bad cooling Wrong Defective AC Damper. Check AC damper Check if AC damper motor and Reconnect lead Refrigerator motor and reed switch reed switch lead wire are wire. temperature. and lead wire are cut. cut with a tester.
  • Page 90 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 CON5 (1 and 7) Replace relay (RY 7 Refer to load with a tester after pressing main and RY 14) or PCB.
  • Page 91 Problems Symptom Causes Checks Measures Remarks Defective Buzzer rings Trouble mode indication. Check trouble diagnosis function. Repair troubles Refer to mode display button. but key does indication in not sense even function button is explanations. pressed. Door Buzzer Buzzer Defective connecting lead wire from Check lead wire associated with door Repair lead wire.

  • Page 92: 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 93 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 94 TROUBLE DIAGNOSIS 3-3. Precautions During Heavy Repair Items Precautions 1. Use of tools. 1) Use special parts and tools for R134a. 2. Removal of retained 1) Remove retained refrigerant more than 5 minutes after turning off a refrigerator. refrigerant. (If not, oil will leak inside.) 2) Remove retained refrigerant by cutting first high pressure side (drier part) with a nipper and then cut low pressure side.
  • Page 95 TROUBLE DIAGNOSIS 3-4. Practical Work For Heavy Repair Items Precautions 1. Removal of residual Evaporator Low pressure side refrigerant. KEYPOINTING Observe the sequence for Compressor removal of refrigerant. Drier Suction (If not, compressor oil may leak.) High pressure side Release Condenser Refrigent Intake...
  • Page 96 TROUBLE DIAGNOSIS Items Precautions 4.Vacuum degassing. Evaporator Suction pipe Compressor Drier Condenser pressure High Blue pressure Yellow Vaccum Pump KEYPOINTING - If power is applied during vacuum degassing, vacuum degassing shall be more effective. Pipe Connection - Operate compressor Connect a red hose to the high pressure side and a blue hose to the while charging refrigerant.
  • Page 97 TROUBLE DIAGNOSIS Items Precautions Evaporator Compressor Drier Condenser Bombe 4) Refrigerant Charging Charge refrigerant while operating a compressor as shown above. 5) Pinch a 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 98 TROUBLE DIAGNOSIS 3-6. Brazing Reference Drawings PIPE ASSY, HOT LINE PIPE ASSY, HOT LINE (Freezer) (Refrigerator) Copper Brazer Copper Brazer CAPI - TUBE DRIER ASSY Copper Silver Brazer Brazer PIPE ASSY, JOINT PIPE ASSY, SUCTION Copper Brazer PIPE ASSY, JOINT CONDENSER ASSY, WIRE Copper Brazer Silver Brazer...

  • Page 99: How To Deal With Claims

    TROUBLE DIAGNOSIS 4. HOW TO DEAL WITH CLAIMS 4-1. Sound Problems Checks and Measures "Whizz" sounds Explain general principles of sounds. • All refrigerator when functioning properly have normal operating sound. The compressor and fan produce sounds. There is a fan in the freezer compartment which blows cool air to freezer and refrigerator compartments.
  • Page 100 TROUBLE DIAGNOSIS Problems Checks and Measures Sounds of water flowing Explain the flow of refrigerant. • When the refrigerator stops, the water flowing sound happens. This sound happens when the liquid or vapor refrigerant flows from the evaporator to compressor. "Click"...
  • Page 101 TROUBLE DIAGNOSIS 4-2. Measures for Symptoms on Temperature Problems Checks and Measures Refrigeration is weak. Check temperature set in the temperature control knob. • 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”...
  • Page 102 TROUBLE DIAGNOSIS 4-3. Odor and Frost Problems Checks and Measures Odor in the refrigerator compartment. Explain the basic principles of food odor. • Each food has its own peculiar odor. Therefore it is impossible to prevent or avoid food odor completely when food is stored in the completely sealed refrigerator compartment.
  • Page 103 TROUBLE DIAGNOSIS 4-5. Others Problems Checks and Measures The refrigerator case is hot. Explain the principles of radiator. • 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 104: How To Disassemble And Assemble

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

  • Page 105: Handle

    HOW TO DISASSEMBLE AND ASSEMBLE 2. HANDLE 4) Disassembly of a grille fan (L) : Hold upper part of a grille fan(L) and pull forward carefully. 1) Put blade screwdriver into a groove on the side of a 5) Loosen two screws. Deco handle and lift up a little bit in arrow direction 6) Disassembly of shroud.

  • Page 106: Dispenser

    HOW TO DISASSEMBLE AND ASSEMBLE 5. DISPENSER 4) Loosen four screws with a phillips screwdriver and pull a funnel Assy to disconnect. 1) Disconnect button assembly by pulling down until it stops and then pulling forward. Funnel Assy Funnel Assy Button 5) Duct cap Assy is disconnected if hold lever connecting screw is loosened with a phillips screwdriver.
  • Page 107 HOW TO DISASSEMBLE AND ASSEMBLE 7) Dispenser Related Parts FRAME ASSY, DISPLAY COVER, DISPENSER PWB(PCB) ASSY, DISPLAY FUNNEL ASSY SWITCH, MICRO FRAME, FUNNEL 10 LEVER(SWITCH) 11 FUNNEL 12 RUBBER, FUNNEL 13 SWITCH, ROCKER 14 SOLENOID ASSY 15 SPRING 16 HOLDER, LEVER 17 CAP, DUCT 19 LEVER, DISPENSER 20 RUBBER, CAP...

  • Page 108: Water Tank And Water Line

    HOW TO DISASSEMBLE AND ASSEMBLE 6. WATER TANK AND WATER LINE 7-2. Home Bar parts disassembly and assembly 1) Disconnect H/Bar Door Assy u The water tank at back and lower part of a refrigerator is fixed by one screw and has a capacity containing 7 2) Loosen two screws attached on the refrigerator glasses (180cc per glass) of cold water.

  • Page 109: Exploded View

    EXPLODED VIEW FREEZER DOOR PART: GR-P247, GR-P207, GR-L247, GR-L207 200A 206C 202A 205A 205C 210A 205D 210B 210C 205C 205B 210C 201A 206C 203A - 109 -...
  • Page 110 EXPLODED VIEW FREEZER DOOR PART: GR-C247, GR-C207, GR-B247, GR-B207 200A 206C 202A 205A 205A 205C 210B 205D 205F 210B 210B 205C 205B 205B 210C 210C 201A 206C 203A - 110 -...
  • Page 111 EXPLODED VIEW Ref No. : GR-P247, GR-P207, GR-C247, GR-C207 REFRIGERATOR DOOR PART : Optional part 230A 205A 205C 241A 206D 241B 147C 147B 232A 147A 205D 234A 243A 240A 264B 402B 205C 266A 266C 205B 262A 265A 261A 267A 264C 260A 243A 264A...
  • Page 112 EXPLODED VIEW Ref No. : GR-L247, GR-L207, GR-B247, GR-B207 REFRIGERATOR DOOR PART : Optional part 230A 241A 206D 241B 232A 239A 147A 205A 243A 205C 240A 205D 243A 240A 205C 205B 240C 231A 233A 240C 206D - 112 -...
  • Page 113 EXPLODED VIEW FREEZER COMPARTMENT : Optional part 101A 270A 271B 271A 137A 136C 402A 403A 135A 136B 136C 136A 152A 400A 401A 302A 130A 128C 408B 121A 128D 120B 320C 320A 120B 320A 272A 103A 408A 320B 120A 135B 105B 125A 312A 125A...
  • Page 114 EXPLODED VIEW REFRIGERATOR COMPARTMENT : Optional part 140A 140D 101B 146A 270B 140C 271B 271A 141A 626C 626B 141D 626A 171A 115A 171B 116A 141C 115B 410A 170C 402A 170B 170A 624C 140D 152A 151C 140A 401A 177A 150A 162A 177B 155A 140C...
  • Page 115 EXPLODED VIEW ICE & WATER PART : Optional part 622A 625A 618A 616E 616F 616G 616D 623A 627A 624B 623A 623B 619A 404A 619A 612A 612C 620A 620B 600A 607A 612B 610A 602A 605A 616C 616A 604A 611A 616A 603B 616B 510B 601A...
  • Page 116 EXPLODED VIEW MACHINE COMPARTMENT : Optional part 411A 502A 407A 407B 505A 303A 500A 303B 502B 304A 303C 303D 313A 300A 310B 307A 307A 306C 317A 301A 317B 306D 104A 308B 306A 309A 309B 305A 403B 306C 305B 310A 309B 305C 308A 308C...
  • Page 117 EXPLODED VIEW DISPENSER PART 277A 278A 278C 402C 278B 276A 275A 278F 278E 405A 275D 278D 276B 401C 275C 275B 501A 281A 280C 280B 280A 207A 279A - 117 -...

  • Page 118: Replacement Parts List

    P/No. 3828JD8467B DEC., 2002 Printed in Korea...

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