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LG GR-359 Service Manual

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REFRIGERATOR
SERVICE MANUAL
CAUTION
BEFORE SERVICING THE UNIT, READ THE "SAFETY
PRECAUTIONS" IN THIS MANUAL.
MODEL: GR-359/399

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  Summary of Contents for LG GR-359

  • Page 1 REFRIGERATOR SERVICE MANUAL CAUTION BEFORE SERVICING THE UNIT, READ THE "SAFETY PRECAUTIONS" IN THIS MANUAL. MODEL: GR-359/399...
  • Page 2: Table Of Contents

    CONTENTS SAFETY PRECAUTIONS ............................... 2 SERVICING PRECAUTIONS..............................3 SPECIFICATIONS................................... 4 PARTS IDENTIFICATION ............................... 5 REPLACEMENT OF DOOR OPENING TYPE ........................6 DISASSEMBLY..................................7-8 DOOR....................................7 DOOR SWITCH..................................7 FAN AND FAN MOTOR ................................ 7 DEF' CONTROL ASM ................................8 LAMP....................................8 ADJUSTMENT...................................
  • Page 3: Safety Precautions

    LOKRING TUBE JOINT LOKRING Figure 23. LOKRING ASSEMBLY JAWS BOLT TOOL Figure 24. LOKRING TOOL - 17 -...
  • Page 4: 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 • Achromatic and odor less gas. LOKRING for connecting or replacing any part in the cycle (No Fire, •...
  • Page 5: Specifications

    Heater, Sheath & Heater, Cord-L EVAPORATOR Fin Tube Type REFRIGERANT R600a(54g) CONDENSER Side & Wire Condenser * Optional Parts LUBRICATION OIL FREOL S10(280 cc) 2.Ref. No: GR-359 ITEMS SPECIFICATIONS ITEMS SPECIFICATIONS DIMENSIONS (mm) 595(W) 626(D) 1710(H) Transparent Shelf(2 EA) NET WEIGHT (kg)
  • Page 6: Parts Identification

    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 (Optional) Utility Corner Refrigerator (movable) Temperature Control Vegetable Drawer Used to keep fruits Bottle Holder and vegetables, etc.
  • Page 7: Replacement Of Door Opening Type

    REPLACEMENT OF DOOR OPENING TYPE 1. PRECAUTION 2) Separating screw and remove the center hinge and the refrigerator door . Move the position of cap 1) Before reversing the door, first of all, you should take Move the position of bracket door and screw out food and accessories like shelves or trays which are not fixed in the refrigerator.
  • Page 8: Disassembly

    DISASSEMBLY 1 DOOR 2 DOOR SWITCH Freezer Door 1) Loosen four screws in upper part and disconnect top cover. 1) Loosen 2 screws and pull the Lower Cover. 2) Disconnect Lead Wire from switch. 2) Loosen hexagonal bolts fixing the lower hinge to the body to remove the freezer door only.
  • Page 9: Def' Control Asm

    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 10: 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 pressure gas evaporated from Evaporator of the Refrigerator, and OVERLOAD PROTECTOR(O.L.P) condenses this gas to high temperature and high pressure gas, and then plays delivering role to Condenser.
  • Page 11: Olp (Over Load Protector)

    CIRCUIT DIAGRAM NOTE : 1. This is a basic diagram and specifications vary in different localities. - 10 -...
  • Page 12: 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 13: Ptc And Olp

    2 RELAY ASSY (PTC AND OLP) Normal operation of Check another Observation value is Compressor is 220V/50Hz : 22Ω±30% electric 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 14: Another Electric Component

    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 15: 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. impossible. • Check if the power switch is set to OFF. • Set the switch to ON. •...
  • Page 16: Refrigerating Cycle

    5 REFRIGERATING CYCLE Troubleshooting Chart TEMPERATURE STATE OF STATE OF THE CAUSE REMARKS OF THE THE SET EVAPORATOR COMPRESSOR PARTIAL Freezer room and Low flowing sound of A little high • A little Refrigerant LEAKAGE Refrigerator Refrigerant is heard and more than •...
  • Page 17 General Control of Refrigerating Cycle ITEMS CONTENTS AND SPECIFICATIONS REMARKS WELDING (1) H 30 • Chemical Ingredients • Recommend H34 containing 34% Ag in the (1) • Ag: 30%, Cu: 27%, Zn: 23%, Cd: 20% • Service Center. • Brazing Temperature: 710~840°C (2) Bcup-2 •...
  • Page 18: Micom Function & Pcb Circuit Explanation

    MICOM FUNCTION & PCB CIRCUIT EXPLANATION This description is made for GR-349, 389SQ. Please refer to overall PCB circuits for other models. 1 FUNCTION EXPOSITION 1) FUNCTION (1) The refrigerator starts from optimum condition when electric power is first on. But the operation condition changes "Mid" "Mid/Max"...
  • Page 19 4) DOOR OPENING ALARM (1) When the REFRIGERATOR DOOR is opened and won't be closed after 1 minute from the its opened, BUZZER sounds to notify it. (2) At frist, BUZZER sounds three times at each intervals of 0.5 second. Then makes a 0.5 second ON/OFF alarm three times at intervals of 30 seconds.
  • Page 20 8) SELF-TEST (1) Function to make service easy in case of occuring a trouble in the product. (2) When occurring a trouble, if the button is pushed, but the function could not operate. (3) If a toruble release during the representation of trouble, a refrigerator performs the normal function(RESET). (4) To represent a ERROR CODE, it use FREEZE TEMP LEDs on TOP COVER.
  • Page 21 9) FUNCTION TEST (1) Function to check the testing function of PCB and refrigerator and to find where the trouble. (2) The test switch is on the MAIN PCB of refrigerator. TEST FUNCTION is released and RESET after MAX. 2hours regardless of TEST MODE. (3) If the buttons on TOP COVER is pushed during TEST MODE, Function is not operated and only BUZZER ring with "DING~ DONG~"...
  • Page 22 2 FUNCTION DESCRIPTION 1) ELECTRIC CIRCUITS 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 CM1 both ends of CM2 both ends of CE2...
  • Page 23 4) LOAD/BUZZER OPERATION, DOOR OPENING SENSING CIRCUIT (1) LOAD OPERATION CHECK COMP, KIND OF LOAD FAN MOTOR DEFROSTING HEATER COMP COOLING FAN MEASURING POINT (IC4) No.11 No.12 No.13 below 1V STATE • If the DOOR-R is opened during FAN MOTOR is operated, FAN MOTOR is stopped immediately. •...
  • Page 24 (3)BUZZER OPERATION CHECK CONDITIONS DISPLAY FUNCTION BUTTON RING DOOR OPEN ALARM MEASURING (DING~ DONG~) (SCREECHING) POINT 0.05s 0.2s 0.1s 0.5s 0.5s IC1 (No.23 Pin) IC1 (No.22 Pin) 2.66kh 2.232kh 3.1kh z (DING~) z (DONG~) - 24 -...
  • Page 25 5) TEMP SENSOR CIRCUITS 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 A Voltage SENSOR 0.5V ~ 4.5V DEFROST SENSOR...
  • Page 26 7) TEMPERATURE COMPENSATION FREEZER ROOM REMARKS RESISTANCE VALUES(R1) TEMPERATURE COMPENSATION 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 27 • 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 28 8) LIGHTING CIRCUITS OF KEY BUTTON INPUT AND DISPLAY PARTS The above circuit is to judge the operation conditions of function key and to light each function indicating LED. It is operated by SCAN method. - 28 -...
  • Page 29 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 PWB ASS'Y AND PARTS LIST 1) MAIN PWB ASS'Y D1 D2 D3 D4 TEST OSC1 TRANS CC10 BUZZER STICKER COMP HEATER1 HEATER2 CON2 CON3 R-DOOR CON1 - 30 -...
  • Page 31 2) REPLACEMENT PARTS LIST - 31 -...
  • Page 32 3) PWB ASS'Y, DISPLAY AND PARTS LIST - 32 -...
  • Page 33 PWB circuit drawing- The PWB circuit drawing may change without notice. - 33 -...
  • Page 34 - 34 -...
  • Page 35: Exploded View

    EXPLODED VIEW & REPLACEMENT PARTS LIST 1.Ref. No : GR-399 • •The parts of refrigerator and the shape of each part are subject to change in different localities. 102A 103B 407B 114A 103A 503B 102B 281B 120H 109C 406B 281F 120E 120B 501A...
  • Page 36 230A 233A 136E 231A 235A 136E 241A 136E OPTIONAL 249B 136F 241A 249C 145C 249A 140A 237A 155A 210A 241C 151A 200A 151B 125A 203A 201A 136A 281D 136B 136C 136D 210A - 36 -...
  • Page 37 2.Ref. No : GR-359 102A 103B 407B 114A 103A 503B 102B 281B 120H 109C 406B 281F 120E 120B 501A 120D 409B RING 120A 120C 405C 304A 404A 282B 405A 401A 604F 329A 301A 5300AJ 330B 610E 332A 109A 105A 108A...
  • Page 38 230A 233A 231A 136E 235A 136E 241A 249B OPTIONAL 241A 249C 136F 145C 249A 140A 237A 155A 210A 241C 151A 151B 200A 203A 201A 281D 125A 136A 136B 136C 210A 136D - 38 -...
  • Page 39: Replacement Parts List

    REPLACEMENT PARTS LIST BUYER NAME:BNL MODEL NAME:GR-359SNQ LG REFERENCE NO:GC-359SNQ.CPIQBNL COLOR:Pearl Inox S AL LOC No. PART No. Description SPEC REMARK 102A 3123JQ2005U TOP COVER ASSEMBLY 102B 3122JD1004L TOP COVER,FRONT 103A 3650JQ2021W HANDLE,BACK 103B 3650JQ2021X HANDLE,BACK 103C 3550JQ0002D COVER,LOWER 104A...
  • Page 40 REPLACEMENT PARTS LIST BUYER NAME:BNL MODEL NAME:GR-359SNQ LG REFERENCE NO:GC-359SNQ.CPIQBNL COLOR:Pearl Inox S AL LOC No. PART No. Description SPEC REMARK 314A 4J03277A STOPPER,COMP 315A 3103JQ1006B COMP BASE ASSEMBLY,STD 315B 4580JQ3001A ROLLER 315C 1PZZJQ3017A PIN,DRAWING 317A 5851JQ2001B DRIER ASSEMBLY 318A...
  • Page 41 P/No. 3828JS8027F...

This manual is also suitable for:

Gr-399