LG GC-P207 Service Manual
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LG GC-P207 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.
Ref No :
GC-P207
Ref No :
GC-L207
http://biz.lgservice.com
Ref No :
GC-C207
Ref No :
GC-B207

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Summary of Contents for LG GC-P207

  • Page 1 REFRIGERATOR SERVICE MANUAL CAUTION PLEASE READ CAREFULLY THE SAFETY PRECAUTIONS OF THIS BOOK BEFORE CHECKING OR OPERATING THE REFRIGERATOR. Ref No : Ref No : Ref No : Ref No : GC-P207 GC-L207 GC-C207 GC-B207...

  • Page 2: Table Of Contents

    CONTENTS WARNINGS AND PRECAUTIONS FOR SAFETY ........................ 3 SPECIFICATIONS................................... 4 PARTS IDENTIFICATION ............................... 8 HOW TO INSTALL THE REFRIGERATOR .......................... 14 HOW TO ADJUST DOOR HEIGHT OF THE REFRIGERATOR ..................14 HOW TO INSTALL WATER PIPE............................15 HOW TO CONTROL THE AMOUNT OF WATER SUPPLIED TO THE ICEMAKER ............19 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. : GC-P207 ITEMS SPECIFICATIONS ITEMS SPECIFICATIONS DIMENSIONS (mm) 890(W) 725(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...
  • Page 5 SPECIFICATIONS 2. Ref No. : GC-L207 ITEMS SPECIFICATIONS ITEMS SPECIFICATIONS DIMENSIONS (mm) 890(W) 725(D) 1750(H) CAPILLARY TUBE ID 0.85 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 6 SPECIFICATIONS 3. Ref No. : GC-C207 ITEMS SPECIFICATIONS ITEMS SPECIFICATIONS DIMENSIONS (mm) 890(W) 725(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 ANTI SWEAT HEATER Home Bar Heater...
  • Page 7 SPECIFICATIONS 4. Ref No. : GC-B207 ITEMS SPECIFICATIONS ITEMS SPECIFICATIONS DIMENSIONS (mm) 890(W) 725(D) 1750(H) CAPILLARY TUBE ID 0.85 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: Parts Identification

    PARTS IDENTIFICATION 1. Ref No. : GC-P207(Internal Filter) Cover Hinge Cover PWB Frame Display Water Tube Ice & Water Dispenser Button Dispenser Lamp Home Bar Freezer Refrigerator compartment compartment Milk product corner Space plus Lamp Shelf Door rack Door rack...
  • Page 9 PARTS IDENTIFICATION 2. Ref No. : GC-P207(External Filter) Cover Hinge Cover PWB Frame Display Water Tube Ice & Water Dispenser Button Dispenser Lamp Home Bar Freezer Refrigerator compartment compartment Milk product corner Space plus Lamp Shelf Door rack Door rack...
  • Page 10 PARTS IDENTIFICATION 3. Ref No. : GC-L207(Internal Filter) Cover Hinge Cover PWB Frame Display Water Tube Ice & Water Dispenser Button Dispenser Lamp Freezer Refrigerator compartment compartment Milk product corner Space plus Lamp Shelf Door rack Door rack (1piece or 2piece) Automatic ice maker *Wine holder...
  • Page 11 PARTS IDENTIFICATION 4. Ref No. : GC-L207(External Filter) Cover Hinge Cover PWB Frame Display Water Tube Ice & Water Dispenser Button Dispenser Lamp Freezer Refrigerator compartment compartment Milk product corner Space plus Lamp Shelf Door rack Door rack (1piece or 2piece) Automatic ice maker *Wine holder...
  • Page 12 PARTS IDENTIFICATION 1. Ref No. : GC-C207 Cover Hinge Cover PWB Home Bar Freezer Refrigerator Refrigerator compartment compartment compartment compartment Milk product corner Lamp Shelf Door rack Door rack (1piece or 2piece) Shelf-F *Wine holder (Plastic or wire) Cover, Lamp-F Shelf Snack drawer (Optional) Shelf(Folding or Normal)
  • Page 13 PARTS IDENTIFICATION 2. Ref No. : GC-B207 Cover Hinge Cover PWB Freezer Refrigerator Refrigerator compartment compartment compartment compartment Milk product corner Lamp Shelf Door rack Door rack (1piece or 2piece) Shelf-F *Wine holder (Plastic or wire) Cover, Lamp-F Shelf Snack drawer (Optional) Shelf(Folding or Normal) Shelf-F *Refreshment center...

  • Page 14: How To Install 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 15: 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 16 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 17 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 18 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 19 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. Lift and pull out the space plus in the upper part of the freezer compartment. 2.
  • Page 20 HOW TO INSTALL REFRIGERATOR 3-2. Control the amount of water supplied to the icemaker. Caution : • Please unplug the power cord from the wall outlet and wait for more than three minutes before disconnecting PWB cover as 310V is applied in the control panel. (+) Driver 1.

  • Page 21: Micom Function

    MICOM FUNCTION 1. Monitor Panel 1-1. GC-P207, GC-L207 Optional Function display board Description FILTER STATUS DISPENSER EXPRESS CUBE BUTTON WATER Type-1 (88-LED) CRUSH FRZ TEMP REF TEMP EXPRESS FRZ DISPENSER FREEZER REFRIGERATOR FILTER LOCK Lock button. EXPRESS FRZ DISPENSER FREEZER...
  • Page 22 MICOM FUNCTION 1-3. Display Second Function FILTER STATUS DISPENSER EXPRESS CUBE BUTTON WATER CRUSH FRZ TEMP REF TEMP EXPRESS FRZ DISPENSER FREEZER REFRIGERATOR FILTER LOCK Lock button. Express freezer. Dispenser Filter reset button. selection button. Temperature adjustment button Temperature adjustment button for freezer compartment.
  • Page 23 "Middle" ➝ "Middle Strong" ➝ "Strong" ➝ "Weak" ➝ "Middle Weak" 3. The temperature setting condition of freezer and refrigerator compartments shall not be indicate in the standard model (GC-P207, GC-L207, GC-C207, GC-B207, ) when refrigerator or home bar door is closed. - 23 -...
  • Page 24 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 25 MICOM FUNCTION 2-5. 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 26 MICOM FUNCTION 2-10. 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 27 MICOM FUNCTION 2-12. Function of Trouble Diagnosis(88-LED) 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 28 MICOM FUNCTION 2-13. Function of Trouble Diagnosis(Bar-LED, Dot-LED) 1. Function of trouble diagnosis is to make the repair service easy when the refrigerator is out of order during service. 2. The function control button does not work but the recognition sound is heard when the refrigerator is out of order. 3.
  • Page 29 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 LED check, not indicated on the failure display part (when pressing freezing temperature adjustment button and special freezing button for a second or more).
  • Page 30 MICOM FUNCTION * LED check function- When freezer and refrigerator temperature control buttons are pressed for more than 1 second at the same time, all LEDS on the display are on. And it returns to the normal conditions when the buttons are released. * Check of freezer fan rpm variation- Freezer fan speed changes from high speed to standard speed and vice versa for 30 seconds whenever freezer and refrigerator temperature control buttons are pressed at the same time for more than 1 second when freezer fan is in operation and returns to the previous rpm.

  • Page 31: Explation For Micom Circuit

    EXPLATION FOR MICOM CIRCUIT 1. Explanation for PWB circuit 1-1. Power circuit 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 <GC-P/L207: 88-LED> <GC-P/L207: Bar-LED> <GC-P/L207: Dot-LED> - 32 -...
  • Page 33 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 34 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 35 EXPLATION FOR MICOM CIRCUIT <GC-P/L207: Bar-LED> ASSEMBLY <GC-P/L207: Dot-LED> ASSEMBLY - 35 -...
  • Page 36 EXPLATION FOR MICOM CIRCUIT 2) GC-B207, GC-C207 ✽ 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 Frost Removal AC Converting Homebar Type of Load COMP R-room LAMP Heater Relay Heater Measuring part (IC6) No.16 No.11 No.12 No.15 No.14 Within 1 V Status 12 V <GC-B/C207: Bar, Dot-LED> ASSEMBLY - 37 -...
  • Page 38 EXPLATION FOR MICOM CIRCUIT 2. Dispenser operation circuit <GC-P/L207: 88-LED> <GC-P/L207: Bar-LED> - 38 -...
  • Page 39 EXPLATION FOR MICOM CIRCUIT <GC-P/L207: Dot-LED> 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.11 IC6-No.10 IC7-No.16 IC7-No.15 IC7-No.13 IC7-No.12 IC7-No.14 Within 1 V Status 12 V 2) Lever S/W sensing circuit...
  • Page 40 EXPLATION FOR MICOM CIRCUIT 3. Door opening sensing circuit <GC-B/C207: 88-LED> <GC-B/C207: Bar, Dot-LED> <GC-P/L207: 88-LED> <GC-P/L207: Bar-LED> <GC-P/L207: Dot-LED> - 40 -...
  • Page 41 EXPLATION FOR MICOM CIRCUIT 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. 48 Pin) IC1 (No. 51 Pin) 2.63 kz (DING) 2.21 kz (DONG) 2.63 kz (BEEP)
  • Page 42 EXPLATION FOR MICOM CIRCUIT 1-5. Temperature sensing circuit <GC-P/L207: 88-LED> <GC-P/L207: Bar-LED> - 42 -...
  • Page 43 EXPLATION FOR MICOM CIRCUIT <GC-P/L207: Dot-LED> 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 44 EXPLATION FOR MICOM CIRCUIT <GC-B/C207: 88-LED> - 44 -...
  • Page 45 EXPLATION FOR MICOM CIRCUIT <GC-B/C207: Bar, Dot-LED> 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 46 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. <GC-B/C207: 88-LED> <GC-B/C207: Bar, Dot-LED> <GC-P/L207: 88-LED> <GC-P/L207: Bar-LED> <GC-P/L207: Dot-LED> 1-7.
  • Page 47 EXPLATION FOR MICOM CIRCUIT 1-8. Stepping motor operation circuit <GC-B/C207: 88-LED> <GC-B/C207: Bar, Dot-LED> <GC-P/L207: 88-LED> <GC-P/L207: Bar-LED> <GC-P/L207: Dot-LED> - 47 -...
  • Page 48 EXPLATION FOR MICOM 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 49 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 50 EXPLATION FOR MICOM CIRCUIT <GC-P/L207: Bar-LED> <GC-P/L207: Dot-LED> - 50 -...
  • Page 51 EXPLATION FOR MICOM CIRCUIT <GC-B/C207: 88-LED> <GC-B/C207: Bar, Dot-LED> - 51 -...
  • Page 52 EXPLATION FOR MICOM CIRCUIT 1-10. Temperature compensation and over-cool/weak-cool compensation circuit 1. Temperature compensation at freezing room, cold storage room <GC-P/L207: 88-LED> <GC-P/L207: Bar-LED> <GC-P/L207: Dot-LED> <GC-B/C207: 88-LED> <GC-B/C207: Bar, Dot-LED> - 52 -...
  • Page 53 EXPLATION FOR MICOM CIRCUIT : JUMP WIRE Freezing room Cold storage room Resistance value Temperature Resistance value Temperature Remarks compensation (RCR1) compensation (R)J1 (R)J2 6.2 kΩ +5 °C 180 kΩ +2.5 °C Warmly 5.1 kΩ +4 °C 56 kΩ +2.0 °C compensate 3 kΩ...
  • Page 54 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 55 EXPLATION FOR MICOM CIRCUIT 2. Display Circuit <GC-P/L207> FILTER STATUS DISPENSER EXPRESS CUBE BUTTON WATER CRUSH FRZ TEMP REF TEMP EXPRESS FRZ DISPENSER FREEZER REFRIGERATOR FILTER LOCK - 55 -...
  • Page 56 EXPLATION FOR MICOM CIRCUIT <GC-B/C207> EXPRESS FRZ CHILD LOCK FRZ TEMP REF TEMP EXPRESS FRZ FREEZER REFRIGERATOR LOCK - 56 -...
  • Page 57 EXPLATION FOR MICOM CIRCUIT 1-11. Key Button Input and Display Lighting Circuit(Bar-LED, Dot-LED) 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. <GC-P/L207: 88-LED>...
  • Page 58 EXPLATION FOR MICOM CIRCUIT <GC-P/L207: Dot-LED> PWB ASSEMBLY, DISPLAY CUBE EXPRESS FRZ FRZ TEMP REF TEMP WATER CRUSH EXPRESS FRZ FREEZER REFRIGERATOR DISPENSER Lock: Hold 3 Secs - 58 -...
  • Page 59 EXPLATION FOR MICOM CIRCUIT <GC-B/C207: 88-LED> EXPRESS FRZ CHILD LOCK FRZ TEMP REF TEMP EXPRESS FRZ FREEZER REFRIGERATOR LOCK <GC-B/C207: Bar, Dot-LED> FRZ TEMP REF TEMP EXPRESS FRZ CHILD LOCK EXPRESS FRZ FREEZER REFRIGERATOR LOCK - 59 -...

  • Page 60: 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 <GC-B/C207: 88-LED> <GC-B/C207: Bar, Dot-LED> 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 for over-cold...

  • Page 61: Pwb Parts Drawing And List

    EXPLATION FOR MICOM CIRCUIT 3. PWB Parts Drawings and List 3-1. PWB Assembly Main Parts Drawings <GC-P/L207: 88-LED> - 61 -...
  • Page 62 EXPLATION FOR MICOM CIRCUIT <GC-P/L207: Bar-LED> - 62 -...
  • Page 63 EXPLATION FOR MICOM CIRCUIT <GC-P/L207: Dot-LED> - 63 -...
  • Page 64 EXPLATION FOR MICOM CIRCUIT <GC-B/C207: 88-LED> - 64 -...
  • Page 65 EXPLATION FOR MICOM CIRCUIT <GC-B/C207: Bar, Dot-LED> - 65 -...
  • Page 66 EXPLATION FOR MICOM CIRCUIT 3-2. Parts List <GC-P/L207: 88-LED> - 66 -...
  • Page 67 EXPLATION FOR MICOM CIRCUIT <GC-P/L207: 88-LED> - 67 -...
  • Page 68 EXPLATION FOR MICOM CIRCUIT <GC-P/L207: Bar-LED> - 68 -...
  • Page 69 EXPLATION FOR MICOM CIRCUIT <GC-P/L207: Bar-LED> - 69 -...
  • Page 70 EXPLATION FOR MICOM CIRCUIT <GC-P/L207: Dot-LED> - 70 -...
  • Page 71 EXPLATION FOR MICOM CIRCUIT <GC-P/L207: Dot-LED> - 71 -...
  • Page 72 EXPLATION FOR MICOM CIRCUIT <GC-B/C207: 88-LED> - 72 -...
  • Page 73 EXPLATION FOR MICOM CIRCUIT <GC-B/C207: 88-LED> - 73 -...
  • Page 74 EXPLATION FOR MICOM CIRCUIT <GC-B/C207: Bar, Dot-LED> - 74 -...
  • Page 75 EXPLATION FOR MICOM CIRCUIT <GC-B/C207: Bar, Dot-LED> - 75 -...

  • Page 76: Pwb Circuit Diagram

    EXPLATION FOR MICOM CIRCUIT 4. PWB circuit diagram - PWB circuit diagram may vary a little bit depending on actual condition. <GC-P/L207: 88-LED> - 76 -...
  • Page 77 EXPLATION FOR MICOM CIRCUIT - 77 -...
  • Page 78 EXPLATION FOR MICOM CIRCUIT <GC-P/L207: Bar-LED> - 78 -...
  • Page 79 EXPLATION FOR MICOM CIRCUIT PWB ASSEMBLY, DISPLAY - 79 -...
  • Page 80 EXPLATION FOR MICOM CIRCUIT <GC-P/L207: Dot-LED> - 80 -...
  • Page 81 EXPLATION FOR MICOM CIRCUIT PWB ASSEMBLY, DISPLAY - 81 -...
  • Page 82 EXPLATION FOR MICOM CIRCUIT <GC-B/C207: 88-LED> - 82 -...
  • Page 83 EXPLATION FOR MICOM CIRCUIT - 83 -...
  • Page 84 EXPLATION FOR MICOM CIRCUIT <GC-B/C207: Bar, Dot-LED> - 84 -...
  • Page 85 EXPLATION FOR MICOM CIRCUIT PWB ASSEMBLY, DISPLAY - 85 -...

  • Page 86: Ice Maker And Dispenser Working Principles And Repair

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

  • Page 87: Function Of Ice Maker

    ICE MAKER AND DISPENSER WORKING PRINCIPLES AND REPAIR 2. Function of Ice Maker 2-1. Initial Control Function 1. When power is initially applied or reapplied after power cut, it detects level of ice maker cube mould after completion of MICOM initialization. The detecting lever moves up and down. 2.
  • Page 88 ICE MAKER AND DISPENSER WORKING PRINCIPLES AND REPAIR 2-4. Ice Ejection Control Function 1. This is to eject ice from ice maker cube mould after ice making is completed. 2. If Hall IC signal is on within 3.6 seconds after ice ejection motor rotates in normal direction, it does not proceed ice ejection but waits.
  • Page 89 ICE MAKER AND DISPENSER WORKING PRINCIPLES AND REPAIR 2-5 Test Function 1. It is to force the operation during operation test, service, and cleaning. The test switch is mounted under the automatic ice maker. The test function starts when the test switch is pressed for more than 0.5 second. 2.

  • Page 90: Ice Maker Troubleshooting

    ICE MAKER AND DISPENSER WORKING PRINCIPLES AND REPAIR 3. Ice Maker Troubleshooting * Troubleshooting: it is possible to confirm by pressing freezer and refrigerator temperature control buttons for more than 1 second. (ice maker is normal if all leds are on): refer to trouble diagnposis function in MICOM function 2-8 (page 18) Is DC Power (5V and 12V) Failed DC Power...

  • Page 91: Ice Maker Circuits

    ICE MAKER AND DISPENSER WORKING PRINCIPLES AND REPAIR 4. Ice Maker Circuits <GC-P/L207: 88-LED> <GC-P/L207: Bar-LED> - 91 -...
  • Page 92 <GC-P/L207: Dot-LED> The above ice maker circuits are applied to GC-P207, GC-L207 and composed of ice maker unit in the freezer and ice maker driving part of main PWB. Water is supplied to the ice maker cube mould through the solenoid relay for ice valve of solenoid valve in the machine room by opening valve for the set time.

  • Page 93: Circuit

    CIRCUIT <GC-P/L/B/C207: Bar-LED> - 93 -...
  • Page 94 CIRCUIT <GC-P/L/B/C207: 88-LED> - 94 -...

  • Page 95: 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 96 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 97 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 98: Faults

    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 99 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 100 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 101 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 102 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 103 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 104 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 105 TROUBLE DIAGNOSIS - 105 -...
  • Page 106 TROUBLE DIAGNOSIS - 106 -...
  • Page 107 TROUBLE DIAGNOSIS - 107 -...
  • Page 108 TROUBLE DIAGNOSIS - 108 -...
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  • Page 116 TROUBLE DIAGNOSIS - 116 -...
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  • Page 119 TROUBLE DIAGNOSIS - 119 -...
  • Page 120 TROUBLE DIAGNOSIS - 120 -...
  • Page 121 TROUBLE DIAGNOSIS - 121 -...

  • Page 122: Cooling Cycle Heavy Repair

    TROUBLE DIAGNOSIS 3. Cooling Cycle Heavy Repair 3-1. Features of refrigerant(R600a) • Achromatic and odor less gas. • Flammable gas and the ignition (explosion) at 494°C. • Upper/lower explosion limit: 1.8%~8.4%Vol. 3-2. Features of the R600a refrigerator • Charging of 60% refrigerant compared with a R134a model. •...
  • Page 123 TROUBLE DIAGNOSIS 3-6. Practical Work For Heavy Repair Item Precaution Utilities 1. Removal of • You must discharge the residual refrigerant Pipe Cutter residual (R600a) in the outdoor. POINT TO BE BROKEN refrigerant • For discharging the refrigerant R600a, Piercing Pliers break the narrow portion of tube extension by hand or with a pipe cutter as shown in Figure.
  • Page 124 TROUBLE DIAGNOSIS Item Precaution Utilities 4. Recharging • After the system is completely Refrigerant process vacuumed, fill it with the refrigerant Cylinder R600a up to what has been REFRIGERANT (R600a) specified at your refrigerator Name Hoses CHARGING HOSE COUPLE Plate. •...
  • Page 125 TROUBLE DIAGNOSIS 3-7. Brazing Reference Drawings 1) Asia / Middle-East Africa PIPE ASSEMBLY PIPE ASSEMBLY HOT LINE HOT LINE (Refrigerator) (Freezer) Copper(Silver) Copper Brazer Brazer CAPI - TUBE DRIER ASSEMBLY Copper(Silver) Silver Brazer Brazer PIPE ASSEMBLY JOINT PIPE ASSEMBLY SUCTION Copper Brazer PIPE ASSEMBLY...

  • Page 126: 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 127 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 128 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 129 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 130 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 131: 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 remove clip then forward in arrow B direction.

  • Page 132: 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 133: 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 134 HOW TO DISASSEMBLE AND ASSEMBLE 7) Dispenser Related Parts FRAME ASSEMBLY, DISPLAY COVER, DISPENSER FRAME, DISPLAY BUTTON, DECO BUTTON, ASSEMBLY PWB(PCB) ASSEMBLY, DISPLAY FUNNEL ASSEMBLY SWITCH, MICRO FRAME, FUNNEL 10 LEVER(SWITCH) 11 FUNNEL 12 DECO, FRAME DISPLAY 14 SOLENOID ASSEMBLY 15 SPRING 16 HOLDER, LEVER 17 CAP, DUCT ASSEMBLY...

  • Page 135: Home Bar

    HOW TO DISASSEMBLE AND ASSEMBLE 6-2. Home Bar parts disassembly and assembly 6. HOME BAR 1) Disconnect H/Bar Door Assembly 6-1. Home Bar related parts 2) Loosen two screws attached on the refrigerator compartment door with a phillips screwdriver. And loosen 4 screws and two screws .

  • Page 136: Exploded View

    EXPLODED VIEW FREEZER DOOR PART: GC-P207, GC-L207 : Optional part 200A 206B 202A 205A 206A 205C 210A 205D 205F 210B 210C 205G 205B 210C 201A 203A - 136 -...
  • Page 137 EXPLODED VIEW FREEZER DOOR PART: GC-C207, GC-B207 : Optional part 200A 206B 202A 205A 206A 205C 210B 205D 205F 210B 210B 205G 205B 210C 210C 201A 203A - 137 -...
  • Page 138 EXPLODED VIEW Ref No. : GC-P207, GC-C207 REFRIGERATOR DOOR PART : Optional part 241C 230A 241A 240A 241B 243A 236A 147C 260A 147B 232A 147A 239A 243A 206B 260B 240A 205A 205F 260C 264B 205C 402B 266C 262A 617A 266A...
  • Page 139 EXPLODED VIEW Ref No. : GC-L207, GC-B207 REFRIGERATOR DOOR PART : Optional part 241C 230A 232A 236A 241A 241B 239A 240A 206B 147C 243A 147B 205A 147A 243A 240B 205C 240A 243A 205F 205D 243A 240A 205G 240C 205B 231A 233A 240C - 139 -...
  • Page 140 EXPLODED VIEW FREEZER COMPARTMENT : Optional part 131B 131J 131A 154A 131E 101A 270A 131B 271B 271A 137B 131C 131H 137A 136D 131D 132A 403A 402A 136C 136B 136A 152A 135A 120D 316B 120D 302B 401A 128C 128D 130A 120B 128E 120B 400A...
  • Page 141 EXPLODED VIEW REFRIGERATOR COMPARTMENT : Optional part 140A 141A 146B 141B 101B 171A 270B 171B 271B 146A 271C 626C 626B 626A 115A 170A 116A 140A 142A 115B 151F 142C 142D 402B 142B 151A 142D 152A 166B 624C 151C 166C 166B 151B 401A 177A...
  • Page 142 EXPLODED VIEW ICE & WATER PART : Optional part 622A 625A 618A 616E 616F 616G 616D 623A 627A 624B 623A 623B 619A 404A 619A 612A 612C 600A 610A 607A 612B 611B 611D 602A 605A 604A 603B 601A 603A 404B 613A 614A 621B 606A...
  • Page 143 EXPLODED VIEW MACHINE COMPARTMENT : Optional part 406A 502A 407B 407A 505A 303A 500A 303B 502B 304A 303C 303D 313A 300A 310B 307A 317A 307A 301A 317B 104A 306A 308B 309A 309B 305A 403B 305B 310A 309C 305C 308A 308C 305C 305B - 143 -...
  • Page 144 EXPLODED VIEW DISPENSER PART 277A 278A 278C 402C 278B 276A 275A 405A 275D 278G 276B 401C 275C 275B 281A 501A 280C 280B 280E 280A 279C 280D 279B 207A 279A - 144 -...
  • Page 145 NOV., 2005 Printed in China P/No. 3828JS8046J...

This manual is also suitable for:

Gc-l207Gc-c207Gc-b207

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