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LG SxS GR-L207MSU 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-L207MSU
Ref. No.
GR-L207MSU
http://biz.lgservice.com
COLOR: Stainless-Steel

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Summary of Contents for LG SxS GR-L207MSU

  • Page 1 http://biz.lgservice.com REFRIGERATOR SERVICE MANUAL CAUTION PLEASE READ CAREFULLY THE SAFETY PRECAUTIONS OF THIS BOOK BEFORE CHECKING OR OPERATING THE REFRIGERATOR. Ref. No. GR-L207MSU MODEL: GR-L207MSU COLOR: Stainless-Steel...

  • 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 8. Do not fray, damage, machine, heavily bend, pull out, Please observe the following safety precautions in order to 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) 898(W) 847(D) 1756(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 ANTI SWEAT HEATER Dispenser Duct Door Heater...
  • Page 5 SPECIFICATIONS 2. Ref No. : GR-P207 ITEMS SPECIFICATIONS ITEMS SPECIFICATIONS DIMENSIONS (mm) 898(W) 762(D) 1756(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 ANTI SWEAT HEATER Dispenser Duct Door Heater...
  • Page 6 SPECIFICATIONS 3. Ref No. : GR-L247 ITEMS SPECIFICATIONS ITEMS SPECIFICATIONS DIMENSIONS (mm) 898(W) 847(D) 1756(H) DRIER 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) 898(W) 762(D) 1756(H) DRIER 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) 898(W) 847(D) 1756(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 ANTI SWEAT HEATER Home Bar Heater...
  • Page 9 SPECIFICATIONS 2. Ref No. : GR-C207 ITEMS SPECIFICATIONS ITEMS SPECIFICATIONS DIMENSIONS (mm) 898(W) 762(D) 1756(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 ANTI SWEAT HEATER Home Bar Heater...
  • Page 10 SPECIFICATIONS 3. Ref No. : GR-B247 ITEMS SPECIFICATIONS ITEMS SPECIFICATIONS DIMENSIONS (mm) 898(W) 847(D) 1756(H) DRIER 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) 898(W) 762(D) 1756(H) DRIER 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-P247, GR-P207 Cover Hinge Cover PWB Home Bar Freezer Refrigerator Compartment Compartment Milk product corner Cover, Lamp-R/U Door rack Shelf Automatic Door rack ice maker Wine Rack Lamp Egg Box Snack Corner Shelf (Steel, Refreshment center T/Glass) (optional)
  • Page 13 PARTS IDENTIFICATION 2. Ref No. : GR-P247, GR-P207 Cover Hinge Cover PWB Home Bar Freezer Refrigerator Compartment Compartment Milk product corner Door rack Cover, Lamp-R/U Shelf Automatic Door rack ice maker Wine Rack Lamp Egg Box Snack Corner Shelf (Steel, Refreshment center T/Glass) (optional)
  • Page 14 PARTS IDENTIFICATION 3. Ref No. : GR-L247, GR-L207 Cover Hinge Cover PWB Freezer Refrigerator Compartment Compartment Milk product corner Cover, Lamp-R/U Door rack Shelf Automatic Door rack ice maker Wine Rack Lamp Egg Box Snack Corner Shelf (Steel, Guide bottle T/Glass) Folding Shelf Drawer...
  • Page 15 PARTS IDENTIFICATION 4. Ref No. : GR-L247, GR-L207 Cover Hinge Cover PWB Freezer Refrigerator Compartment Compartment Milk product corner Cover, Lamp-R/U Door rack Shelf Automatic Door rack ice maker Wine Rack Lamp Egg Box Snack Corner Shelf (Steel, Guide bottle T/Glass) Folding Shelf Door rack...
  • Page 16 PARTS IDENTIFICATION 1. Ref No. : GR-C247, GR-C207 Cover Hinge Cover PWB Home Bar Freezer Refrigerator Compartment Compartment Milk product corner Cover, Lamp-R/U Door rack Shelf Ice Bank Door rack Assembly Wine Rack Lamp Egg Box Snack Corner 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 Cover, Lamp-R/U Shelf Ice Bank Assembly Wine Rack Lamp Egg Box Shelf (Steel, Snack Corner T/Glass) Folding Shelf Door rack Drawer Vegetable Box Door rack...

  • Page 18: How To Install The Refrigerator

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

  • 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. I Please confirm the following installation parts. I 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 I Install Water Filter (Applicable to some models only) I 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 FRZ TEMP LOCK FRZ TEMP LOCK LOCK LOCK TEMP TEMP ROOM REF TEMP SUPER FRZ TEMP TEMP ROOM DISPENSER REF TEMP SUPER FRZ TEMP TEMP WATER CRUSHED CUBED...
  • Page 26 MICOM FUNCTION 2-1-2. LCD Back Light Control 1. In order to easily view display status on the LCD, LCD Back Light is turned on for a minute in application of initial power, for a minute in button manipulation and for a minute after closing time from opening time of door. 2.
  • Page 27 MICOM FUNCTION 2-4. When ice maker does not operate smoothly Ice is lumped together • When ice is lumped together, take the ice lumps out of the ice storage bin, break them into small pieces, and then place them into the ice storage bin again. •...
  • Page 28 MICOM FUNCTION 2-8. 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 29 MICOM FUNCTION 2-13. 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 30 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 31 MICOM FUNCTION Note1) In error of outside sensor, setting temperature for freezing/ cold storage is normally displayed and indicated “Er” on the outside temperature display part (normally displayed except for the outside temperature display part). Note2) Nonconforming contents of poor R2 sensor, ice-making sensor and ice-making kit are displayed in LCD check, not indicated on the failure display part (when pressing freezing temperature adjustment button and special freezing button for a second or more).
  • Page 32 MICOM FUNCTION ✻ LCD check function: If simultaneously pressing special freezing button and cold temperature adjustment button for a second, a back light is turned on and all display LCD graphics on. If releasing the button, the LCD graphic displays the previous status, the back light is turned off (LCD graphic and back light ON/OFF check).

  • Page 33: Explation For Micom Circuit

    EXPLATION FOR MICOM CIRCUIT 1. Explanation for PWB circuit 1-1. Power circuit 1. GR-P247, L247, C247, B247 / P207, L207, C207, B207 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 34 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 35 EXPLATION FOR MICOM CIRCUIT 1-4. Load/dispenser operation, door opening circuit 1. LOAD DRIVING CIRCUIT ✽ In even 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 36 EXPLATION FOR MICOM CIRCUIT 2) GR-C247, B247, C207, B207 ✽ 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. ✽...
  • Page 37 EXPLATION FOR MICOM CIRCUIT 2. Dispenser operation circuit 1) Check load driving status WATER VALVE GEARED SOLENOID SOLENOID SOLENOID Type of Load MOTOR CUBE DISPENSER PILOT WATER Measuring part IC6-11 IC6-10 IC7-16 IC7-15 IC7-13 IC7-14 Within 1 V Status 12 V 2) Lever S/W sensing circuit Measuring part IC1(Micom) (No.
  • Page 38 EXPLATION FOR MICOM CIRCUIT 3. Door opening sensing circuit 1) GR-P247, L247, P207, L207 2) GR-C247, B247, C207, B207 Measuring part IC1 (MICOM) No. 45, 46 Pin Door of Freezing/Cold Storage Room Closing 5 V ( A - B , C - D . S/W at both ends are at Off status) Opening 0 V ( A - B , C - D .
  • Page 39 EXPLATION FOR MICOM CIRCUIT 1-5. Temperature sensing circuit 1) GR-P247, L247, P207, L207 (R)J1 (R)J2 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 40 EXPLATION FOR MICOM CIRCUIT 2) GR-C247, B247, C207, B207 (R)J1 (R)J2 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 41 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-P247, L247, P207, L207 2) GR-C247, B247, C207, B207 1-7. Option designation circuit (model separation function) 1) GR-P247, L247, P207, L207 2) GR-C247, B247, C207, B207 The above circuits are used for designating separation by model as option and notifying it to MICOM.
  • Page 42 EXPLATION FOR MICOM CIRCUIT 1-8. Stepping motor operation circuit (cold storage room, Miracle Zone) 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 (TA777AP) at the MICOM PIN 33 and outputting “High”, “Low” signal by step numbers fixed through MICOM PIN 34 and 35,.
  • Page 43 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 44 EXPLATION FOR MICOM CIRCUIT 2) GR-C247, B247, C207, B207 - 44 -...
  • Page 45 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-P247, L247, P207, L207 2) GR-C247, B247, C207, B207 (R)J1 (R)J2 : JUMP WIRE Freezing room Cold storage room Resistance value Temperature Resistance value...
  • Page 46 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 47 EXPLATION FOR MICOM CIRCUIT u Temperature compensation table at the freezing room is as follows: Change J1: 5.1 kΩ J1: 3.9 kΩ J1: 2.7 kΩ J1: 1.8 kΩ J1: 910 Ω J1: resistance J2: 1.2 kΩ J2: 2.4 kΩ J2: 3 kΩ J2: 5.1 kΩ J2: 6.2 kΩ resistance J1: 5.1 kΩ...

  • Page 48: 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-P247, L247, P207, L207 2) GR-C247, B247, C207, B207 Temperature compensation in CUT JCR1 +1 °C +2 °C JCR2 +1 °C JCR3 -1 °C -2 °C JCR4 -1 °C Compensation...
  • Page 49 EXPLATION FOR MICOM CIRCUIT 1-11. Communication circuit and connection L/Wire between main PCB and display PCB The following circuit is a communication circuit used for exchanging the necessary information between main MICOM of main PCB and LCD dedicated MICOM for LCD control of display PCB. Transmission/receipt L/Wire together with the necessary display PCB for driving the display PCB is required.
  • Page 50 EXPLATION FOR MICOM CIRCUIT 2) GR-C247, B247, C207, B207 FRZ TEMP LOCK TEMP ROOM TEMP REF TEMP SUPER FRZ TEMP 2. Sensor resistance characteristics table Cold storage sensor 1, 2. Measuring Temperature (°C) Freezing Sensor Frost removal sensor, Outside sensor -20 °C 22.3 kΩ...

  • Page 51: Pwb Parts Drawing And List

    EXPLATION FOR MICOM CIRCUIT 3. PWB parts diagram and list 3-1. PWB Assembly main part diagram 1. GR-P247, L247, P207, L207 - 51 -...
  • Page 52 EXPLATION FOR MICOM CIRCUIT 2. GR-C247, B247, C207, B207 - 52 -...
  • Page 53 EXPLATION FOR MICOM CIRCUIT 3-2. Parts list 1. GR-P247, L247, P207, L207 - 53 -...
  • Page 54 EXPLATION FOR MICOM CIRCUIT - 54 -...
  • Page 55 EXPLATION FOR MICOM CIRCUIT 2. GR-C247, B247, C207, B207 - 55 -...
  • Page 56 EXPLATION FOR MICOM CIRCUIT - 56 -...
  • Page 57 EXPLATION FOR MICOM CIRCUIT 3-3. DISPLAY ASSEMBLY part diagram 1. GR-P247, L247, P207, L207 DOUBLE SIDE TAPE SPREAD SHEET - 57 -...
  • Page 58 EXPLATION FOR MICOM CIRCUIT 2. GR-C247, B247, C207, B207 DOUBLE SIDE TAPE SPREAD SHEET - 58 -...
  • Page 59 3-4. DISPLAY circuit diagram 1. GR-P247, L247, P207, L207 Reception Transmission Parts without ( ) mark means SMD parts. - 59 -...
  • Page 60 2. GR-C247, B247, C207, B207 Reception Transmission Parts without ( ) mark means SMD parts. - 60 -...

  • Page 61: 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-P247, L247, P207, L207 - 61 -...
  • Page 62 EXPLATION FOR MICOM CIRCUIT - 62 -...
  • Page 63 EXPLATION FOR MICOM CIRCUIT 2. GR-C247, B247, C207, B207 - 63 -...
  • Page 64 EXPLATION FOR MICOM CIRCUIT - 64 -...

  • Page 65: 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 66: 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 67 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 68 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 69: 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 70: 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 GR-P247/207, GR-L247/207 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 71: Circuit

    CIRCUIT - 71 -...
  • Page 72 CIRCUIT - 72 -...

  • Page 73: 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. I Check the voltage. Bad connection between adapter and outlet. (faulty adapter) The Inner diameter of adapter.
  • Page 74 TROUBLE DIAGNOSIS CLAIMS. CAUSES AND CHECK POINTS. HOW TO CHECK I Check the clogged 2. No cooling. 2) Refrigeration system is clogged. evaporator by heating (as Moisture Residual moisture Air Blowing. Not performed. soon as the cracking sound clogged. in the evaporator. Too short.
  • Page 75 TROUBLE DIAGNOSIS CLAIMS. CAUSES AND CHECK POINTS. HOW TO CHECK 3. Refrigeration 1) Refrigerant Partly leaked. Weld joint leak. is weak. Parts leak. 2) Poor defrosting capacity. I Check visually. Drain path (pipe) clogged. Inject P/U into drain hose. Inject through the hole.
  • Page 76 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. Too short defrosting time. Defrost Sensor. - Faulty characteristics. Seat-D(missing, location. thickness). Structural fault.
  • Page 77 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 78 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 79 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 80 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 81 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 82 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 83: 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 84 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 85 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 86 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 87 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 88 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 89 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 90 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 91 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 92 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 93 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 94 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 95 2-9. Micom Problems Symptom Causes Checks Measures Remarks Bad PCB All display Bad connection Bad connector Visual check on connector Reconnect electric power. LCD are off. between Main PCB connection from main connection. connector. and display circuit. PCB to display PCB. Defective PCB trans.
  • Page 96 Problems Symptom Causes Checks Measures Remarks Bad cooling. Freezer Compressor does Compressor Lead Wire Check compressor Lead Wire Reconnect Lead temperature is not start. is cut. with a tester. Wire. high. Defective compressor Measure voltage at PCB CON2 Replace relay(RY1 Refer to load driving relay.
  • Page 97 Problems Symptom Causes Checks Measures Remarks Bad cooling Wrong Defective Step Motor Check Step Motor Check if Step Motor damper Reconnect lead Refrigerator Damper. damper motor and motor and reed switch lead wire. temperature. reed switch and lead wire are cut with a tester. wire are cut.
  • Page 98 Problems Symptom Causes Checks Measures Remarks Bad defrost. Defrost is not Defrost lead wire is cut. Check if defrost lead wire is cut with a Reconnect Lead working. tester. Wire. Defective defrost driving relay. Check the voltage of CON2 (1 and 7) Replace relay (RY 7 Refer to load with a tester after pressing main and RY 3) or PCB.
  • Page 99 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 100: 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 101 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 102 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 103 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 104 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 105 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 106 TROUBLE DIAGNOSIS 3-6. Brazing Reference Drawings 1) Asia / Middle-East Africa PIPE ASSEMBLY HOT LINE PIPE ASSEMBLY HOT LINE (Refrigerator) (Freezer) Copper(Silver) Copper Brazer Brazer CAPI - TUBE DRIER ASSEMBLY Copper(Silver) Silver Brazer Brazer PIPE ASSEMBLY PIPE ASSEMBLY SUCTION JOINT Copper Brazer PIPE ASSEMBLY...

  • Page 107: How To Deal With Claims

    TROUBLE DIAGNOSIS 4. HOW TO DEAL WITH CLAIMS 4-1. Sound Problems Checks and Measures I Explain general principles of sounds. "Whizz" 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 108 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 characteriistics of moving parts.
  • Page 109 TROUBLE DIAGNOSIS 4-2. Measures for Symptoms on Temperature Problems Checks and Measures I Check temperature set in the temperature control knob. Refrigeration is weak. • Refrigerator is generally delivered with the button set at “normal use” (MID). But customer can adjust the temperature set depending on their habit and taste. If you feel the refrigeration is weak, then set the temperature control button at “strong”...
  • Page 110 TROUBLE DIAGNOSIS 4-3. Odor and Frost Problems Checks and Measures I Explain the basic principles of food odor. Odor in the refrigerator compartment. • Each food has its own peculiar odor. Therefore it is impossible to prevent or avoid food odor completely when food is stored in the completely sealed refrigerator compartment.
  • Page 111 TROUBLE DIAGNOSIS 4-4. 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 112: 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 Assembly U) in arrow direction A and pull 1) Remove lower cover and then disconnect water forward in arrow B direction.

  • Page 113: 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) Unscrew 5) Loosen two screws. 2) Disassemble from the door 6) Disassembly of shroud. F(U) : Disconnect housing of B 3) Unscrew after removing two rail guides with a blade screwdriver.

  • Page 114: Dispenser

    HOW TO DISASSEMBLE AND ASSEMBLE 5. DISPENSER 4) Loosen four screws with a phillips screwdriver and pull a funnel Assembly to disconnect. 1) Disconnect button assembly by pulling down until it stops and then pulling forward. Funnel Assembly Funnel Assembly Button 5) Duct cap Assembly is disconnected if hold lever connecting screw is loosened with a phillips screwdriver.
  • Page 115 HOW TO DISASSEMBLE AND ASSEMBLE 7) Dispenser Related Parts FRAME ASSEMBLY DISPLAY COVER, DISPENSER PWB(PCB) ASSEMBLY, DISPLAY FUNNEL ASSEMBLY SWITCH, MICRO FRAME, FUNNEL 10 LEVER(SWITCH) 11 FUNNEL 12 RUBBER, FUNNEL 13 SWITCH, ROCKER 14 SOLENOID ASSEMBLY 15 SPRING 16 HOLDER, LEVER 17 CAP, DUCT 19 LEVER, DISPENSER 20 RUBBER, CAP...

  • Page 116: Water Tank And Water Line

    HOW TO DISASSEMBLE AND ASSEMBLE 7-2. Home Bar parts disassembly and assembly 6. WATER TANK AND WATER LINE 1) Disconnect H/Bar Door Assembly 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 117: Exploded View

    EXPLODED VIEW FREEZER DOOR PART: GR-P247, GR-P207, GR-L247, GR-L207 206C 205B 206E 202A 205F 205H 200A 210A 210B 205E 210C 210C 205J 206F 201A 205G 203A 205C 206A - 117 -...
  • Page 118 EXPLODED VIEW FREEZER DOOR PART: GR-C247, GR-C207, GR-B247, GR-B207 206C 205B 202A 206E 205F 205H 200A 210B 210B 207A 205E 210B 210C 205J 206F 210C 201A 205G 203A 205C 206A - 118 -...
  • Page 119 EXPLODED VIEW Ref No. : GR-P247, GR-P207, GR-C247, GR-C207 REFRIGERATOR DOOR PART : Optional part 206H 241A 205B 206D 239A 241B 232A 147C 147B 147A 230A 205G 243A 205J 240A 264D 264B 402B 266A 222A 262A 265A 261A 252A 260A 264C 243A 264A...
  • Page 120 EXPLODED VIEW Ref No. : GR-L247, GR-L207, GR-B247, GR-B207 REFRIGERATOR DOOR PART : Optional part 241A 206D 241B 147C 232A 147B 239A 206G 205B 147A 230A 243A 205G 205J 240A 243A 240A 205E 240C 231A 233A 240C 205D 205H 206B 205F - 120 -...
  • Page 121 EXPLODED VIEW FREEZER COMPARTMENT : Optional part 131B 131A 120A 101A 270A 271B 131B 131E 271A 131A 137B 137A 136D 131D 403A 402A 131C 136B 136C 135A 136A 152A 400A 302B 132A 401A 128C 130A 128E 128D 128F 120B 120B 120C 272A 103A...
  • Page 122 EXPLODED VIEW REFRIGERATOR COMPARTMENT : Optional part 101B 140A 146A 270B 271B 271C 141A 626C 626B 626A 171A 115A 171B 115B 116A 402A 115C 151A 170A 624C 141D 152A 151C 401A 149C 177A 151B 142A 162A 177B 150A 155A 166C 162B 272B 166B...
  • Page 123 EXPLODED VIEW ICE & WATER PART 622A 625A : Optional part 618A 616E 616F 616G 616D 623A 627A 624B 623A 623B 619A 404A 619A 612A 610A 610A 612C 600A 611A 611B 607A 612B 602A 611C 605A 616C 616A 611A 604A 616A 611D 603B...
  • Page 124 EXPLODED VIEW MACHINE COMPARTMENT : Optional part 406A 502A 410H 410G 505A 303A 500A 303B 502B 304A 303C 303D 313A 300A 310B 307A 307A 317A 301A 317B 104A 308B 306A 309A 309B 305A 403B 305B 310A 309C 305C 308A 308C 305C 305B - 124 -...
  • Page 125 EXPLODED VIEW DISPENSER PART 277A 278A 278C 402C 278B 276A 275A 278E 405A 275D 278D 276B 401C 275C 275B 501A 281A 280C 280B 207B 280A 279A 207A - 125 -...

  • Page 126: Replacement Parts List

    P/No. 3828JD8694A JUL., 2004 Printed in Korea...

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