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LG GC-B359B Service Manual
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LG GC-B359B Service Manual

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REFRIGERATOR
SERVICE MANUAL
CAUTION
BEFORE SERVICING THE UNIT, READ
THE "SAFETY PRECAUTIONS" IN THIS MANUAL.
MODEL: GC-B359B/B399B/F399B
GC-B359P/B399P

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Summary of Contents for LG GC-B359B

  • Page 1 REFRIGERATOR SERVICE MANUAL CAUTION BEFORE SERVICING THE UNIT, READ THE "SAFETY PRECAUTIONS" IN THIS MANUAL. MODEL: GC-B359B/B399B/F399B GC-B359P/B399P...

  • Page 2: Table Of Contents

    CONTENTS SAFETY PRECAUTIONS .............................. 2 SERVICING PRECAUTIONS ............................3 SPECIFICATIONS ................................4 PARTS IDENTIFICATION ...............................6 REPLACEMENT OF DOOR OPENING TYPE ........................8 DISASSEMBLY ................................9 DOOR..................................9 DOOR SWITCH................................9 FAN AND FAN MOTOR..............................10 DEF' CONTROL ASM ..............................10 LAMP..................................10 ADJUSTMENT.......

  • Page 3: Servicing Precautions

    SERVICING PRECAUTIONS Features of refrigerant (R600a) After the refrigerant (R600a) is completely discharged, repair any defective parts and replace the dryer. At any case you must use the LOKRING for • Achromatic and odor less gas. connecting or replacing any part in the cycle (No Fire, No Welding). •...

  • Page 4: Specifications

    Heater, Sheath REFRIGERANT R600a(54g) CONDENSER Side & Wire Condenser LUBRICATION OIL FREOL S10(280 cc) WATER DISPENSER WATER TANK(1 EA)* * Optional Parts 2.Ref. No: GC-B359B ITEMS SPECIFICATIONS ITEMS SPECIFICATIONS DIMENSIONS (mm) 595(W)X651(D)X1726(H) Transparent Shelf(2 EA) NET WEIGHT (kg) Vegetable Container(1 EA)
  • Page 5 SPECIFICATIONS 3.Ref. No: GC-B399P/F399P ITEMS SPECIFICATIONS ITEMS SPECIFICATIONS DIMENSIONS (mm) 595(W)X617(D)X1896(H) Transparent Shelf(3 EA) NET WEIGHT (kg) Vegetable Container(1 EA) REFRIGERATOR COMPARTMENT COOLING SYSTEM Fan Cooling Vegetable Container Cover(1 EA) TEMPERATURE REFRIGERATOR Knob Dial Fresh Zone Container(1 EA)* CONTROL FREEZER Button Dairy Pocket Cover(2 EA) Full Automatic...

  • Page 6: Parts Identification

    PARTS IDENTIFICATION Door Swich Utility Corner (movable) Removable Glass Shelf Door Basket (2 or 3) (2, 3, 4) Lamp Multi-air Flow Duct Egg Tray(1 or 2) Fresh Zone (Optional) Water Tank2 Bottle Refrigerator Temperature Control Vegetable Drawer Used to keep fruits and vegetables, etc.
  • Page 7 PARTS IDENTIFICATION Freezer Temperature Control Egg Tray(1 or 2) Removable Rotatable Glass Shelf(2 or 3) Door Basket (3 or 5) Lamp Multi-air Flow Duct Fresh Meat Keeper Utility Corner (Optional) (movable) Refrigerator Bottle Holder Temperature Control Vegetable Drawer Used to keep fruits and vegetables, etc.

  • Page 8: Replacement Of Door Opening Type

    REPLACEMENT OF DOOR OPENING TYPE Precaution Before reversing the door, first of all, you should take out food and accessories like shelves or trays which are not fixed in the fridge-freezer. Use Torque Wrench or Spanner to fix or remove the bolt. Do not lay the fridge-freezer down.

  • Page 9: Disassembly

    DISASSEMBLY 1. DOOR 2. DOOR SWITCH 1) Use the driver broken the two small cap of the front. • Freezer Door 2) Loosen four screws in upper part and disconnect top cover. 1) Loosen 2 screws and pull the Lower Cover. 3) Disconnect Lead Wire from switch.

  • Page 10: Fan And Fan Motor

    4 FAN AND FAN MOTOR 6 DAMPER CONTROL 1) Remove the Cover Lamp, R and loosen 2 screw. 1) Remove freezer drawers. 2) Pull the Control Box, R and separate the lead wire 2) Remove two cap, screws and loosen two screws in Grille Fan. housing.

  • Page 11: Adjustment

    ADJUSTMENT 1. COMPRESSOR 3) PTC-Applied Circuit Diagram According to Starting Method for the Motor 1) Role The compressor intakes low temperature and low OVERLOAD PROTECTOR(O.L.P) pressure gas evaporated from Evaporator of the Refrigerator, and condenses this gas to high temperature and high pressure gas, and then plays delivering role to Condenser.

  • Page 12: Olp (Over Load Protector)

    3. OLP (OVER LOAD PROTEC TOR) CONTACTING 1) Definition of OLP POINT COVER (1) OLP (OVER LOAD PROTECTOR) is attached to the BIMETAL Hermetic Compressor and protects the Motor by cutting off current in Compressor Motor in case of CONTACTING over-rising temperature by Bimetal in the OLP.

  • Page 13: Troubleshooting

    TROUBLESHOOTING (Mechanical Part) 1. COMPRESSOR AND ELECTRIC COMPONENTS Power Remove the Relay Assy (Rating Voltage Source. from the Compressor ±10%) and measure the voltage between Terminal C of Compressor and Terminals M or S of Relay Assy No Voltage. Applied voltage isn't Advise the customer in the range of Rating to use a regular...

  • Page 14: Ptc And Olp

    2. RELAY ASSY (PTC AND OLP) Normal operation of Check another Observation value is Compressor is electric 220V/50Hz : 22Ω±30% Separate the Relay Assy 115V/60Hz : 6.8Ω±30% impossible or poor. components. from Compressor and 240V/50Hz : 33Ω±30% measure the resistance 127, 220V/60Hz : between M and S with a 22Ω±30%...

  • Page 15: Another Electric Componen

    3. ANOTHER ELECTRIC COMPONENTS Cooling is impossible Compressor Check if current flows to Cause. doesn't run. the following components. a. Thermistor Poor contacting. b. Starting devices Shorted or broken. Poor contacting c. OLP or shorted. d. Compressor coil Coil shorted. Replace Poor contacting e.

  • Page 16: Service Diagnosis Chart

    4. SERVICE DIAGNOSIS CHART COMPLAINT POINTS TO BE CHECKED REMEDY Cooling is • Is the power cord unplugged from the outlet? • Plug to the outlet. • Check if the power switch is set to OFF. • Set the switch to ON. impossible.

  • Page 17: Refrigerating Cycle

    5. REFRIGERATING CYCLE M Troubleshooting Chart TEMPERATURE STATE OF STATE OF THE CAUSE OF THE REMARKS THE SET EVAPORATOR COMPRESSOR PARTIAL Freezer room and Low flowing sound of Refrigerant A little high more than • A little Refrigerant discharges. Refrigerator don't cool is heard and frost forms in inlet ambient temperature.
  • Page 18 M General Control of Refrigerating Cycle ITEMS CONTENTS AND SPECIFICATIONS REMARKS WELDING (1) H 30 • Recommend H34 containing 34% Ag in the Service Center. • Chemical Ingredients Ag: 30%, Cu: 27%, Zn: 23%, Cd: 20% • Brazing Temperature: 710~840°C (2) Bcup-2 •...
  • Page 19 LOKRING TUBE JOINT LOKRING Figure 23. LOKRING ASSEMBLY JAWS BOLT TOOL Figure 24. LOKRING TOOL -19-...

  • Page 20: Micom Function & Pcb Circuit Explanation

    MICOM FUNCTION & PCB CIRCUIT EXPLAN ATION This description is made for GC-B359, B399. Please refer to overall PCB circuits for other models. 1 FUNCTION EXPOSITION 1) FUNCTION • The initial Temperature of the Freezer Compartment is -19°C r espectively. You can now adjust the temperature of the compartments as you want.
  • Page 21 3) SUPER FREEZING (1) It is the function which increases the cooling speed of freezer by continuously operating compressor and freezer fan. When it’s button is pressed, GRAPHIC is on. (2) Whenever selection switch is pressed, selection/release (GRAPHIC on/off) changes in turn. (3) If power is on after power cut, SUPER FREEZING function is canceled.
  • Page 22 5) DEFROSTING (1) If the accumulated time for the operation of the COMPRESSOR is meet with 7 hours, the DEFROSTING HEATER is started. (2) The first defrosting is performed at 4 hours(compressor ON) later since the power is on. (3) If DEFROST SENSOR is over 7°C during DEFROSTING, end the operation of DEFROSTING with DEFROSTING HEATER paused, And after 7 minutes, the operation for the freezing is started.
  • Page 23 O : OPERATE NORMAL OPERATION IN TROUBLE'S OCCURRING ITEMS DESCRIPTION ERROR CODE LEDs COMP DEFROST HEATER 15 minutes On/ FREEZER FREEZER SENSOR open 15 minutes Off SENSOR abnormal or short. DEFROST DEFROST SENSOR open No defrosting SENSOR abnormal or short. DEFROSTING DEFROST HEATER, FUNCTION...
  • Page 24 2 FUNCTION DESCRIPTION 1) ELECTRIC CIRCUITS 14821 TRANS secondary side is composed of electric power circuits for RELAY driving electricity (12Vdc) and for supplying electricity to MICOM and IC (5Vdc). The voltage in each part is as follows. PARTS both ends of VA1 both ends of both ends of CE1 both ends of CE2...
  • Page 25 4) LOAD/BUZZER OPERATION (1) LOAD OPERATION CHECK COMP, KIND OF LOAD FAN MOTOR DEFROSTING HEATER COMP COOLING FAN MEASURING POINT (IC5) No.C No.D No.E below 1V STATE If the DOOR-R is opened during FAN MOTOR is operated, FAN MOTOR is stopped immediately. The A , B of DOOR S/W-R is connected DOOR OPEN DETECTION CIRCUIT as follow.
  • Page 26 5) TEMP SENSOR CIRCUITS 29.2KF 26.1KF 26.2KF The above circuit reads the surrounding temperature, DEFROSTING temperature and FREEZER ROOM temperature into MICOM(IC1). OPEN or SHORT state of each SENSOR is as follows. SENSOR CHECK POINT NORMAL (-30°C~50°C) SHORT OPEN ROOM TEMPERATURE POINT Voltage SENSOR...
  • Page 27 7) TEMPERATURE COMPENSATION FREEZER ROOM RESISTANCE VALUES(R1) TEMPERATURE COMPENSATION REMARKS 180 kΩ + 5.0°C COMPENSATE WARMLY 56 kΩ +4.0°C 33 kΩ +3.0°C 18 kΩ +2.0°C 12 kΩ +1.0°C 10 kΩ 0°C STANDARD 8.2 kΩ -1.0°C 5.6 kΩ -2.0°C 3.3 kΩ -3.0°C 2 kΩ...
  • Page 28 • TEMPERATURE COMPENSATION OF FREEZER ROOM Revi s ed resi s tance 470Ω 2kΩ 3.3kΩ 5.6kΩ 8.2kΩ 10kΩ 12kΩ 18kΩ 33kΩ 56kΩ 180kΩ Present resi s tance 470Ω 1°C↑ 2°C↑ 3°C↑ 4°C↑ 5°C↑ 6°C↑ 7°C↑ 8°C↑ 9°C↑ 10°C↑ COMPENSATE 2kΩ 1°C↓...

  • Page 29: Sensor Resistance Characteristics Table

    3. SENSOR RESISTANCE CHARACTERISTICS TABLE MEASURED TEMPERATURE RESISTANCE OF FREEZER SENSOR RESISTANCE OF DEFROST SENSOR, ROOM TEMPERATURE SENSOR -20°C 22.3kΩ 77kΩ -15°C 16.9kΩ 60kΩ -10°C 13.0kΩ 47.3kΩ -5°C 10.1kΩ 38.4kΩ 0°C 7.8kΩ 30kΩ +5°C 6.2kΩ 24.1kΩ +10°C 4.9kΩ 19.5kΩ +15°C 3.9kΩ...
  • Page 30 4. MAIN PCB ASS'Y AND PARTS LIST 1) MAIN PCB ASS'Y D1 D2 D3 D4 TEST OSC1 TRANS STICKER CC10 COMP HEATER LAMP CON3 CON2 R-DOOR CON1 - 30-...
  • Page 31 2) REPLACEMENT PARTS LIST W O R K D E SC R IPT IO N SPEC' MAKER REMARK Q T Y Q T Y Q T Y Q T Y Q T Y Q T Y N O . PWB,MAIN FR-1(DS-1107A) SUZHONGDAZHAN t=1.6...
  • Page 32 3) PCB ASS'Y, DISPLAY AND PARTS LIST 0 1 WORK DESCRIPTION SPEC MAKER REARK Qty Qty Qty No. KIA7042AP FUJITSU MB89F202 FUJITSU TRANSISTOR KRA106M Q2-5 TRANSISTOR KRA106M CAPACITOR,METAL GLAZED 104 50V TAE YANG/YAGEO CC1-3,13 CAPACITOR,FIXED ELECTROLYTIC 100uF,16V YAGEO/SAMWHA/G-LUXON CAPACITOR,FIXED ELECTROLYTIC 0.1uF,16V YAGEO/SAMWHA/G-LUXON CAPACITOR,FIXED ELECTROLYTIC...
  • Page 33 5. PCB assembly,MAIN circuit drawing- The PCB assembly,MAIN circuit drawing may change without notice. CON1 XOUT POWER TEST RESET KIA7042 COMP HEATER (AIN5) LAMP (AIN4) (AIN3) TO DISP CON2 16.2K (AIN2) 13 2 26.1K (AIN1) 12 2 D-SENSOR P72 17 P72 16 29.2K (AIN0)
  • Page 34 6. PCB assembly,display circuit drawing- The PCB assembly,display circuit drawing may change without notice. 100uF LED1 FIG.1 FIG.2 COM1 COM2 COM3 COM4 COM1 COM2 COM3 4.7K KIA7042AP CE13 RT-SENSOR CON1 R29 2K CC17 P37(BZ) REMARK FIG.1 FIG.2 FIG.2 0.1uF R27 2K CC15 102 R28 2K CC16 102...

  • Page 35: Exploded View

    EXPLODED VIEW & REPLACEMENT PARTS LIST Ref. No : GC-B359/B399/F359/F399 The parts of refrigerator and the shape of each part are subject to change in different localities. 103B 281F 102A 407H 103A 407B 281E 281B 102B 406B 281A 102C 120E 120B 503A 409B...
  • Page 36 Ref. No : GC-B399B/B359B/B399P/B359P 230A 136E 281H 231A 235A 235A 233A 207A 501A 241A 241A 279A 136F 145C 280E 279B 241A 241A 249A 140A 282E 249B 155A 241A 282D 237A 249C 151E 210A 151B 241C 200A 125A 282E 203A 201A 136Y 205A 205F...
  • Page 37 230A Ref. No : GC-F399B/F399P/F359B/F359P 249B 136E 281H 249A 249C 233A 207A 235A 501A 279A 235A 136F 145C 241A 280E 279B 241A 140A 282E 241A 155A 241C 282D 151E 210A 151B 200A 205A 205F 125A 205D 203A 201A 136Y 205C 136A 205B 282E...
  • Page 38 Ref. No : GC-F399B/F359B/F399P/F359P 611H 611J 611A 611G 611P 611F 611E 611D 611U 611B 611V 611C 611M 611Q 611N 611K -38-...
  • Page 39 P/NO:3828JS8029F...

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