LG GR-S552 Service Manual
  1. Manuals
  2. Brands
  3. LG Manuals
  4. Refrigerator
  5. GR-S552
  6. Service manual

LG GR-S552 Service Manual

Hide thumbs
Table of Contents

Advertisement

Quick Links

REFRIGERATOR
SERVICE MANUAL
CAUTION
BEFORE SERVICING THE UNIT, READ THE "SAFETY
PRECAUTIONS" IN THIS MANUAL.
MODEL: GR-S552 / GR-S592
http://biz.lgservice.com

Advertisement

Table of Contents
loading

Related Manuals for LG GR-S552

Summary of Contents for LG GR-S552

  • Page 1 REFRIGERATOR SERVICE MANUAL CAUTION BEFORE SERVICING THE UNIT, READ THE "SAFETY PRECAUTIONS" IN THIS MANUAL. MODEL: GR-S552 / GR-S592...

  • Page 2: Table Of Contents

    CONTENTS CONTENTS..................................... 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 LAMP....................................7 CONTROL BOX-R................................7 ADJUSTMENT..................................8-9 COMPRESSOR..................................8 PTC-STARTER..................................8 OLP (OVER LOAD PROTECTOR)............................

  • 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-S552 ITEMS SPECIFICATIONS ITEMS SPECIFICATIONS FREEZER FREEZER 1 EA SHELF NET CAPACITY REFRIGERATOR REFRIGERATOR 2 EA ( l ) TOTAL VEGETABLE TRAY Drawer Type DIMENSIONS (mm) 755(W) 689(D) 1777(H) EGG TRAY 2 Pieces NET WEIGHT (kg) ICE TRAY...

  • Page 5: Parts Identification

    2. PARTS IDENTIFICATION 2-1 FEATURE CHART FREEZER COMPARTMENT Lamp Shelf Freezer Temperature Control Dial Twisting Ice Serve(Option) Freezer Door Rack General Type Ice Making REFRIGERATOR Egg Storage Rack COMPARTMENT Deodorizer Refrigerator Temperature Electronic Control Fresh Meat Lamp Shelves Vegetable Drawer Used to keep fruits and vegetables, etc.

  • Page 6: Disassembly

    3. DISASSEMBLY 3-1 DOOR 3-2 DOOR SWITCH 1. To remove the door switch, pull out it with a '—' type Freezer Door 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

    3-4 DEF' CONTROL ASSY 3-5-1 Freezer room lamp 1. Unplug the power cord from the outlet. Def control ASM consists of Defrost Sensor and FUSE–M. 2. Remove the room lamp lid by taking down while pulling Defrost Sensor functions to defrost automatically and it is it forward with your hand after inserting finger into the attached to the Evaporator and the metal side of the case inside hole as shown in (figure 16).

  • Page 8: 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 9: Olp (Over Load Protector)

    4-3 OLP (OVER LOAD PROTECTOR) CONTACTING 4-3-1 Definition of OLP POINT 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. (2) When over-voltage flows to Compressor motor, Bimetal CONTACTING POINT...

  • Page 10: Troubleshooting

    6. TROUBLESHOOTING 6-1 COMPRESSOR AND ELECTRIC COMPONENTS (Rating Voltage Remove the PTC-Starter Power Source. ±10%)? from the 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 11: Ptc And Olp

    6-2 PTC AND OLP Check another Normal operation of Separate the PTC from Observation value is electric components. Compressor is 220V/50Hz : 47Ω ± 30% Compressor and impossible or poor. 220 - 240V/50Hz : 47Ω ± 30% measure the resistance 110 -115V/60Hz : 6.8Ω...

  • Page 12: 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 13: 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 14: Refrigerating Cycle

    6-5 REFRIGERATING CYCLE Troubleshooting Chart TEMPERATURE STATE OF STATE OF THE CAUSE REMARKS OF THE THE SET EVAPORATOR COMPRESSOR PARTIAL Freezer and Low flowing sound of A little high • A little Refrigerant LEAKAGE Refrigerator Refrigerant is heard and more than •...
  • Page 15 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 16: Description Of Function & Circuit Of Micom

    7. DESCRIPTION OF FUNCTION & CIRCUIT OF MICOM The following description is basically for GR-S552/GR-S592. 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 17 7-1-4 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 18 7-1-6 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 19: 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 20 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 21 7-2-4 LOAD DRIVE CIRCUIT 1. Load Drive Condition Check Freezer Fan Motor Double Cooling Defrosting Load Type Comp Heater High RPM Standard RPM Fan Motor (R-Fan) Measurement Location (IC5) No. 16 No. 13 No. 15 No. 14 No. 12 1V or below Condition - 21 -...
  • Page 22 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 23 7-2-7 TEMPERATURE COMPENSATION & OVERCOOLING/UNDERCOOLING COMPENSATION CIRCUIT 1. Refrigerator Temperature Compensation Refrigerator Resistance Temperature Remark (RCR1) Compensation 180 KΩ +2.5 °C Compensation by raising the 56 KΩ +2.0 °C temperature 33 KΩ +1.5 °C 18 KΩ +1.0 °C 12 KΩ +0.5 °C 10 KΩ...
  • Page 24 7-2-8 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. - 24 -...
  • Page 25 7-3 RESISTANCE SPECIFICATION OF SENSOR TEMPERATURE SENSOR RESISTANCE OF REFRIGERATOR (DEFROST) SENSOR - 20 ˚C 77 KΩ - 15 ˚C 60 KΩ - 10 ˚C 47.3 KΩ - 5 ˚C 38.4 KΩ 0 ˚C 30 KΩ + 5 ˚C 24.1 KΩ + 10 ˚C 19.5 KΩ...
  • Page 26 - 26 -...
  • Page 27 - 27 -...
  • Page 28 7-5 MAIN PWB ASS'Y AND PARTS LIST 7-5-1 MAIN PWB ASS'Y 1. R-B52DZ/R-B55DZ - 28 -...
  • Page 29 7-5-2 REPLACEMENT PARTS LIST - 29 -...
  • Page 30 7-5-3 PWB ASS'Y, DISPLAY AND PARTS LIST - 30 -...
  • Page 31 7-6 PWB DIAGRAM - 31 -...
  • Page 32 - 32 -...

  • Page 33: Exploded View

    8. EXPLODED VIEW The parts of refrigerator and the shape of each part are subject to change in different localities. : optional parts 301A 281A 401A 103B 103A 281B 281C 129A 411A 501F 501A 418A 410G 410H 409A 282A 158B 282B 406B 501K...
  • Page 34 : optional parts 405C 200A 404A 330B 405C 405A 203A 205A 201A 329A 332A 212G 205A 212A 212C 125A 149A 125H 131C 149A 210B 131A 136A 131A 210A 136B 125A 230A 125A 235A 149B 233A 234B 149B 233B 231A 136N 136P 149C 140A...

This manual is also suitable for:

Gr-s592Gr-s552gta

Table of Contents