LG GR-262SQ Service Manual
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LG GR-262SQ Service Manual

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REFRIGERATOR
SERVICE MANUAL
CAUTION
BEFORE SERVICING THE UNIT, READ THE "SAFETY
PRECAUTIONS" IN THIS MANUAL.
Ref. No.
GR-262SQ
GR-292SQ
MODEL: GR-262
GR-292
Ref. No.
GR-262SQ
GR-292SQ
http://biz.lgservice.com
Ref. No.
GR-262QVC
GR-292QVC

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Summary of Contents for LG GR-262SQ

  • Page 1 REFRIGERATOR SERVICE MANUAL CAUTION BEFORE SERVICING THE UNIT, READ THE "SAFETY PRECAUTIONS" IN THIS MANUAL. Ref. No. Ref. No. Ref. No. GR-262SQ GR-262SQ GR-262QVC GR-292SQ GR-292SQ GR-292QVC MODEL: GR-262 GR-292...

  • Page 2: Table Of Contents

    CONTENTS SAFETY PRECAUTIONS ............................... 2 SERVICING PRECAUTIONS..............................3 SPECIFICATIONS................................... 4 PARTS IDENTIFICATION ............................... 5 DISASSEMBLY..................................6-7 DOOR....................................6 DOOR SWITCH..................................6 FAN AND FAN MOTOR................................ 6 DEF' CONTROL ASM ................................7 REFRIGERATOR ROOM LAMP ............................7 CONTROL BOX-R................................7 REPLACEMENT OF DOOR OPENING TYPE........................8-9 ADJUSTMENT.................................

  • Page 3: Servicing Precautions

    SERVICING PRECAUTIONS Air Recharging in Compressor vacuum operation is over, add the quantity in grams of R- 134a to the refrigerant system. Remember that every Test the refrigeration by connecting it electrically before system has an exact quantity of R-134a with a tolerance of refilling operation.

  • Page 4: Specifications

    1. SPECIFICATIONS 1-1 GR-262 ITEMS SPECIFICATIONS ITEMS SPECIFICATIONS FREEZER FREEZER 1 EA SHELF NET CAPACITY REFRIGERATOR REFRIGERATOR 2 EA ( l ) TOTAL VEGETABLE TRAY Drawer Type GR-262S(V)Q 540(W) 610(D) 1510(H) EGG TRAY 1 Piece DIMENSIONS (mm) GR-262Q(V)C 540(W) 628(D) 1510(H) ICE TRAY 1 Piece ( * 2)

  • Page 5: Parts Identification

    2. PARTS IDENTIFICATION FREEZER COMPARTMENT Twisting Ice Service (Optional) or General Type Ice Making Freezer Shelf Freezer Door Rack Freezer Temperature Control Knob REFRIGERATOR COMPARTMENT Egg Storage Rack Chilled Compartment Refrigerator Temperature Control Micom Refrigerator Door Rack (Optional) Shelves Lamp Deodorizer Refrigerator Door (Optional)

  • Page 6: Disassembly

    3. DISASSEMBLY 3-1 DOOR 3-2 DOOR SWITCH Freezer Door 1. To remove the door switch, pull out it with a '—' type 1. Remove the hinge cover by pulling it upwards. driver as shown in (figure 9). 2. Loosen hexagonal bolts fixing the upper hinge to the 2.

  • Page 7: Def' Control Asm

    5. Disconnect the housing of lead wire. 3-6 REFRIGERATOR ROOM LAMP 6. Separate the Fan Assy. 1. Remove the cover lamp-R by pulling with a '–––' type 7. Loose 2 screw fixed to the Bracket. driver. 8. Pull out Shroud-F remove the Fan Motor Assy. 2.

  • Page 8: Replacement Of Door Opening Type

    - Converting Door is Optional 3-8 REPLACEMENT OF DOOR OPENING TYPE Precaution 1. Before replacing the door opening type, first of all, you should take out foodstuffs and accessories like shelves or trays, and so on which are not fixed in the refrigerator.
  • Page 9 Move the Position of Adjustable Screw Assemble the Hinge Lower Assembly Move the Cap , Bracket of the Refrigerator Move the Cap and Assemble the Hinge-C Door. After removing the washer. é Assembe the Door Stopper-F for Right è Move the Cap and Assemble the Freezer Opening Type.

  • Page 10: Adjustment

    4. ADJUSTMENT 4-1 COMPRESSOR 4-2-3 PTC-Applied Circuit Diagram According to Starting Method of Motor 4-1-1 Role The compressor inhales low temperature and low pressure gas evaporated from Evaporator of the Refrigerator, and OVERLOAD PROTECTOR condenses this gas to high temperature and high pressure gas, and then plays delivering role to Condenser.

  • Page 11: Olp (Over Load Protector)

    4-3 OLP (OVER LOAD PROTECTOR) CONTACTING POINT 4-3-1 Definition of OLP COVER (1) OLP (OVER LOAD PROTECTOR) is attached to Hermetic Compressor and protects Motor by cutting off BIMETAL current in Compressor Motor by Bimetal in the OLP in case of over-rising temperature. CONTACTING (2) When over-voltage flows to Compressor motor, Bimetal POINT...

  • Page 12: Troubleshooting

    6. TROUBLESHOOTING 6-1 COMPRESSOR AND ELECTRIC COMPONENTS Power Remove the PTC- (Rating Voltage Source. Starter from the ±10%)? Compressor and measure the voltage between Terminal C of Compressor and Terminals 5 or 6 of PTC. No Voltage. OLP disconnected? Replace OLP. Check connection condition.

  • Page 13: Ptc And Olp

    6-2 PTC AND OLP Normal operation of Check another Observation value is Separate the PTC-Starter Compressor is electric 220V/50Hz : 22 ±30% from Compressor and 115V/60Hz : 6.8 ±30% impossible or poor. components. measure the resistance 240V/50Hz : 33 ±30% between No.

  • Page 14: Another Electric Component

    6-3 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

    6-4 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 S/W is set to OFF. • Set the switch to ON. •...

  • Page 16: Refrigerating Cycle

    6-5 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: Refrigerating Cycle

    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: Description Of Function & Circuit Of Micom

    7. DESCRIPTION OF FUNCTION & CIRCUIT OF MICOM The following description is basically for GR-262/GR-292. For the other models, refer to the diagram of the entire PCB circuit. 7-1 FUNCTION 7-1-1 FUNCTION 1. When the appliance is plugged in, it is set to ‘Medium’. Each time the button is pushed, it is set to ‘Medium’...
  • Page 19 7-1-2 DEFROSTING 1. The defrosting is performed each time when the total running time of the compressor reaches 7 hours. 2. After the power is turned on (or restored after a power failure), the defrosting starts when the total running time of the compressor reaches 4 hours.
  • Page 20 7-1-4 ERROR DIAGNOSTIC MODE 1. The error diagnostic mode allows the SVC when a fault that may affect the performance of the product occurs while operating the product. 2. Even if the function control button is pushed when an error occurs, the function will not be performed. 3.

  • Page 21: Pcb Function

    7-2 PCB FUNCTION 7-2-1 POWER CIRCUIT The secondary part of the TRANS is composed of the power supply for the display and relay drive (12Vdc) and that for the MICOM and IC (5Vdc). The voltage for each part is as follows. PART VA 1 CE 2...
  • Page 22 7-2-2 OSCILLATION CIRCUIT This circuit is to generate the base clock for calculating time and the synchro clock for transmitting data from and to the inside logic elements of the IC1(MICOM). Be sure to use the authentic parts since the calculating time by the IC1 may be changed or it will not work if the OSC1 SPEC is changed.
  • Page 23 7-2-4 LOAD DRIVE CIRCUIT 1. Load Drive Condition Check Comp, Load Type Defrosting Heater Freezer Fan Motor Measurement Location 1V or below Condition - 23 -...
  • Page 24 7-2-5 TEMPERATURE SENSOR CIRCUIT The upper CIRCUIT reads REFRIGERATOR temperature and DEF-SENSOR temperature for defrosting into MICOM. OPENING or SHORT state of each TEMPERATURE SENSOR are as follows. SENSOR CHECK POINT NORMAL(-30 °C ~ 50 °C) SHORT-CIRCUITED OPEN Refrigerator Sensor POINT Voltage 0.5 V ~ 4.5 V...
  • Page 25 7-2-6 TEMPERATURE COMPENSATION & OVERCOOLING/UNDERCOOLING COMPENSATION CIRCUIT 1. Refrigerator Temperature Compensation Refrigerator Resistance Temperature Remark (RCR1) Compensation 180 K +5.0 °C Compensation by raising the 56 K +4.0 °C temperature 33 K +3.0 °C 18 K +2.0 °C 12 K +1.0 °C 10 K 0 °C...
  • Page 26 7-2-7 KEY BUTTON INPUT & DISPLAY LIGHT ON CIRCUIT The circuit shown above is to determine whether a function control key on the operation display is pushed and to turn on the corresponding function indication LED. The drive type is the scan type. - 26 -...
  • Page 27 7-3. RESISTANCE SPECIFICATION OF SENSOR TEMPERATURE SENSOR RESISTANCE OF REFRIGERATOR (DEFROST) SENSOR - 20 ˚C 77 K - 15 ˚C 60 K - 10 ˚C 47.3 K - 5 ˚C 38.4 K 0 ˚C 30 K + 5 ˚C 24.1 K + 10 ˚C 19.5 K + 15 ˚C...
  • Page 28 - 28 -...
  • Page 29 - 29 -...
  • Page 30 7-4 MAIN PWB ASS'Y AND PARTS LIST 7-4-1 MAIN PWB ASS'Y 1. R-B52DZ/R-B55DZ - 30 -...
  • Page 31 7-4-2 REPLACEMENT PARTS LIST - 31 -...
  • Page 32 7-4-3 PWB ASS'Y, DISPLAY AND PARTS LIST P/No Description Spec Maker Bigo 6870JB2061A PWB(PCB),DISPLAY R-B29 (HM-PJT) DOO SAN 6600JB8005A SWITCH KPT-1105A KYUNG IN SW101 0DL500329AA SV50-R032BF569GG SEOUL SEMI. L101~L103 0DD414809AA DIODE, SWITCHING 1N4148 26MM LEAD WIRE UL1007 AWG24 (VSF 0.18/12/0.3MM LEAD WIRE UL1007 AWG24 (VSF 0.18/12/0.3MM LEAD WIRE...
  • Page 33 7-5 PWB DIAGRAM - 33 -...
  • Page 34 - 34 -...

  • Page 35: Exploded View

    7. EXPLODED VIEW The par ts of refrigerator and the shape of each par t are subject to change in different localities : optional parts 301A 401A 303A 418A 303A 501F 281B 125L 411A 501A 282B 410G 406B 120A 501K 105A 317A 158C...
  • Page 36 : optional parts 405C 405A 330B 332A 404A 329A 110B 125A 131A 125H 149A 125A 131A 149B 140A 149C 149C 154A 151A - 36 -...
  • Page 37 200A 203A 201A 212G 212A 212C 205A 210A 235A 230A 233A 231A 241B 241D 212A 212C 243A - 37 -...

  • Page 38: Replacement Parts List

    REPLACEMENT PART LIST GN-262QVC GN-262QVCS Loc No. Description Silky Grey Silky Grey 105A DRAIN ASSEMBLY,PIPE 5251JM2001C 5251JM2001C 106A LEG,ADJUST 4778JA2007A 4778JA2007A 106B LEG ASSEMBLY,ADJUST 4779JA2011A 4779JA2011A 110B GUIDE,TRAY ICE 4974JA1054A 4974JA1054A 125L BUSH 3J06307A 3J06307A 140A DOOR,FRESH ROOM 3580JA1027A 3580JA1027A 149A SHELF,F 5026JA1131B...
  • Page 39 REPLACEMENT PART LIST GN-262QVC GN-262QVCS Loc No. Description Silky Grey Silky Grey 315A COMP BASE ASSEMBLY,STD 3103JA1017C 3103JA1017C 317A DRIER ASSEMBLY 5851JA2002R 5851JA2002R 319A TRAY,DRIP 3390JA1141A 3390JA1141A 329A FAN ASSEMBLY 1J02380A 1J02380A 330B SHROUD ASSEMBLY,FAN 4999JA2020A 4999JA2020A 332A GRILLE ASSEMBLY,FAN 3531JA2018B 3531JA2018B 401A...
  • Page 40 REPLACEMENT PART LIST GN-292QVCS GN-292QVCS Loc No. Description Silky Grey Light Inox 105A DRAIN ASSEMBLY,PIPE 5250JM2001D 5250JM2001D 106A LEG,ADJUST 4778JA2007A 4778JA2007A 106B LEG ASSEMBLY,ADJUST 4779JA2011A 4779JA2011A 110B GUIDE,TRAY ICE 4974JM1001A 4974JM1001A 125L BUSH 3J06307A 3580JA1027A 140A DOOR,FRESH ROOM 3580JA1027A 3580JA1027A 149A SHELF,F 5026JA1131B...
  • Page 41 REPLACEMENT PART LIST GN-292QVC GN-292QLC Loc No. Description Silky Grey Light Inox 315A COMP BASE ASSEMBLY,STD 3103JA1017C 3103JA1017C 317A DRIER ASSEMBLY 5851JA2002R 5851JA2002R 319A TRAY,DRIP 3390JA1141A 3390JA1141A 329A FAN ASSEMBLY 1J02380A 1J02380A 330B SHROUD ASSEMBLY,FAN 4999JA2020A 4999JA2020A 332A GRILLE ASSEMBLY,FAN 3531JA2018B 3531JA2018B 401A...
  • Page 42 P/No. 3828JD8330A JAN., 2002 Printed in Korea...

This manual is also suitable for:

Gr-292sqGr-262Gr-292Gr-262qvcGr-292qvc

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