LG GR-F218NI Service Manual
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LG GR-F218NI Service Manual

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REFRIGERATOR
SERVICE MANUAL
CAUTION
BEFORE SERVICING THE UNIT,
READ THE SAFETY PRECAUTIONS IN THIS MANUAL.
MODEL: GR-F218NI
COLOR: TITANIUM

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Summary of Contents for LG GR-F218NI

  • Page 1 REFRIGERATOR SERVICE MANUAL CAUTION BEFORE SERVICING THE UNIT, READ THE SAFETY PRECAUTIONS IN THIS MANUAL. MODEL: GR-F218NI COLOR: TITANIUM...

  • Page 2: Table Of Contents

    CONTENTS SAFETY PRECAUTIONS ............................... 2 SPECIFICATIONS................................... 3 PARTS IDENTIFICATION ............................... 4 DISASSEMBLY..................................5-8 REMOVING AND REPLACING REFRIGERATOR DOORS ....................5 DOOR....................................6-7 TO REMOVE THE DISPENSER ............................7 DOOR ALIGNMENT................................7 FAN AND FAN MOTOR................................ 8 DEFROST CONTROL ASSEMBLY............................8 LAMP....................................8 CONTROL BOX-REFRIGERATOR ............................8 MULTI DUCT ..................................

  • Page 3: Specifications

    1. SPECIFICATIONS GR-F218/ GR-F258 ITEMS SPECIFICATIONS ITEMS SPECIFICATIONS DOOR DESIGN Side Rounded VEGETABLE TRAY Opaque Drawer Type DIMENSIONS (mm) 908(W) X 763(D) X 1771(H) 21cu.ft COMPRESSOR PTC Starting Type 908(W) X 869(D) X 1771(H) 25cu.ft EVAPORATOR Fin Tube Type 137kg (21cu.ft) CONDENSER Wire Condenser NET WEIGHT (kg)

  • Page 4: Parts Identification

    2. PARTS IDENTIFICATION Filter Dairy Bin Refrigerator Light Egg Box Shelves Design-A-Door Design-A-Door Wine Holder Optibin Crisper Keeps fruits and vegetable fresh Design-A-Door and crisp Cover Front Glide N Serve Customcube Icemaker Pull out Drawer Ice Bin Durabase Freezer Door Rack (25cuft ONLY) Divider - 4 -...

  • Page 5: Disassembly

    3. DISASSEMBLY 3-1 REMOVING AND REPLACING REFRIGERATOR DOORS Removing Refrigerator Door w w CAUTION: Before you begin, unplug the refrigerator. Remove food and bins from doors. u u Left Door 1. Disconnect water supply tube by pushing back on the disconnect ring (4). 2.

  • Page 6: Door

    3-2 DOOR Door Gasket Replacement 1. Insert gasket bracket clips Door Gasket Removal 1) Insert gasket bracket edge beneath door frame edge. 1. Remove door frame cover 2) Turn upper gasket bracket spring so that the spring Starting at top of cover and working down, snap cover ends are in the door channel.

  • Page 7: To Remove The Dispenser

    2) Press gasket into channels on the three remaining 2. Pry off cover dispenser. sides of door. Figure 6 Figure 9 3. Replace door frame cover Starting at top of cover and working down, snap cover Disconnect wire harness. back into door. 3.

  • Page 8: Fan And Fan Motor

    3-5 FAN AND FAN MOTOR 3-7-1 Refrigerator Compartment Lamp 1. Remove the freezer shelf. (If your refrigerator has an 1. Unplug the power cord from the outlet. icemaker, remove the icemaker first) 2. Remove refrigerator shelves. 2. Remove the plastic guide for slides on left side by 3.

  • Page 9: Adjustment

    4. ADJUSTMENT 4-1 COMPRESSOR 4-2-3 PTC-Applied Circuit Diagram Starting Method for the Motor 4-1-1 Role The compressor intakes low temperature and low pressure gas from the evaporator of the refrigerator and compresses OVERLOAD PROTECTOR this gas to high-temperature and high-pressure gas. It then delivers the gas to the condenser.

  • Page 10: To Remove The Cover Ptc

    4-3 OLP (OVERLOAD PROTECTOR) 4-4 TO REMOVE THE COVER PTC 4-3-1 Definition of OLP (1) OLP (OVERLOAD PROTECTOR) is attached to the Compressor and protects the Motor by opening the circuit to the Motor if the temperature rises and activating the bimetal spring in the OLP. (2) When high current flows to the Compressor motor, the Bimetal works by heating the heater inside the OLP, and the OLP protects the Motor by cutting off the...

  • Page 11: Circuit Diagram

    5. CIRCUIT DIAGRAM - 11 -...

  • Page 12: Troubleshooting

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

  • Page 13: Ptc And Olp

    6-2 PTC AND OLP Normal operation of Separate PTC-Starter Observation value is Compressor is from Compressor and 115V/60Hz : 6.8 ±30% impossible or poor. measure resistance between No. 5 and 6 of PTC-Starter with a Tester. (Figure 20) Replace PTC- The resistance value Starter.

  • Page 14: Other Electrical Components

    6-3 OTHER ELECTRICAL COMPONENTS Not cooling at all Check for open short or Compressor Cause incorrect resistance readings doesn't run. in the following components a. Starting devices Short, open, or broken. Poor contact b. OLP or shorted. Coil open or shorted. c.

  • Page 15: Service Diagnosis Chart

    6-4 SERVICE DIAGNOSIS CHART COMPLAINT POINTS TO BE CHECKED REMEDY No Cooling. • Is the power cord unplugged from the outlet? • Plug into the outlet. • Check if the power switch is set to OFF. • Set the switch to ON. •...

  • Page 16: Refrigeration Cycle

    6-5 REFRIGERATION CYCLE Troubleshooting Chart TEMPERATURE STATE OF STATE OF THE CAUSE REMARKS OF THE THE UNIT EVAPORATOR COMPRESSOR PARTIAL Freezer Low flowing sound of A little higher • Refrigerant level is low due LEAKAGE compartment and Refrigerant is heard and than ambient •...
  • Page 17 6-5-1 SEALED SYSTEM DIAGNOSIS “Not Cooling” Complaint All components operating, No airflow problems, Not frosted up as a defrost problem problem has been isolated to sealed system area Frost None Partial Pattern? Equalization Equalization Test Test Very Fast Very Slow Very Slow Very Fast Fast...

  • Page 18: Operation Principle & Repair Method Of Icemaker

    7. OPERATION PRINCIPLE AND REPAIR METHOD OF ICEMAKER 7-1 OPERATION PRINCIPLE 7-1-1 Operation Principle of IceMaker Power On Start Position • Adjusts EJECTOR to Start Position with power on. Ice Making • Waits until water becomes cold after starting the Mode ice making operation.
  • Page 19 7-2 ICE MAKER FUNCTIONS 7-2-1 Start Position 1. After POWER OFF or Power Outage, check the EJECTOR's position with MICOM initialization to restart. 2. How to check if it is in place: - Check HIGH/LOW signals from HALL SENSOR in MICOM PIN. 3.
  • Page 20 7-2-4 Fill / Park Position 1. Once a normal harvest mode has been completed, the water solenoid will be activated. 2. The amount of water is adjusted by pressing the Fill Key repeatedly. This changes the time allowed for fill as illustrated in the table below.
  • Page 21 7-2-5 Function TEST 1. This is a compulsory operation for TEST, SVC, cleaning, etc. It is operated by pressing and holding the Fill Key for 3 seconds. 2. The test works only in the Ice Making Mode. It cannot be entered from the Harvest or Fill mode. (If there is an ERROR, it can only be checked in the TEST mode.) 3.

  • Page 22: Description Of Function & Circuit Of Micom

    8. DESCRIPTION OF FUNCTION & CIRCUIT OF MICOM 8-1 FUNCTION 8-1-1 Function 1. When the appliance is plugged in, it is set to 3°C for Refrigerator and -18°C for freezer. You can adjust the Refrigerator and the Freezer control temperature by pressing the ADJUST button. 2.
  • Page 23 8-1-5 CONTROL OF FREEZER FAN MOTOR 1. Freezer fan motor has high and standard speeds. 2. High speed is used at power-up, for express freezing, and when refrigerator is overloaded. Standard speeds is used for general purposes. 3. To improve cooling speed, the RPM of the freezer fan motor change from normal speed to high. 4.
  • Page 24 8-1-9 Buzzer Sound When the button on the front Display is pushed, a Ding~ Dong~ sound is produced. (Refer to the Buzzer Circuit 8-2-3 No. 3) 8-1-10 Defrosting (removing frost) 1. Defrosting starts each time the COMPRESSOR running time reaches 7 hours. 2.

  • Page 25: Defect Diagnosis Function

    8-1-13 Defect Diagnosis Function 1. Automatic diagnosis makes servicing the refrigerator easy. 2. When a defect occurs, the buttons will not operate; but the tones. such as ding. will sound. 3. When the defect CODE removes the sign, it returns to normal operation (RESET). 4.
  • Page 26 8-1-14 TEST Mode 1. The Test mode allows checking the PCB and the function of the product as well as finding out the defective part in case of an error. 2. The test mode is operated by pressing two buttons at Display panel. 3.
  • Page 27 8-2 PCB FUNCTION 8-2-1 Power Circuit The secondary part of the TRANSFORMER is composed of the power supply for the display, the BLDC FAN Motor drive (15.5 V), the relay drive (12 Vdc) and the MICOM and IC (5 Vdc). The voltage for each part is as follows: PART VA 1...
  • Page 28 8-2-2 Oscillation Circuit This circuit generates 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 specified replacement parts, since calculating time by the IC1 may be changed.
  • Page 29 8-2-4 Load / Buzzer Drive & Open Door Detection Circuit 1. Load Drive Condition Check FRENCH DOOR DEFROSTING COMP LAMP VALVE LOAD TYPE HEATER 1, 2 / HEATER DEW HEATER Measurement Location (IC6) NO.13 NO.14 NO.16 NO.12 NO.15 1V or below Condition 2.
  • Page 30 3. Open Door Detection Circuit Check Measurement Location Freezer/ (PIN NO.30 & PIN NO.37) Refrigerator Door Closed Open 8-2-5 Temperature Sensor Circuit The upper CIRCUIT reads REFRIGERATOR temperature, FREEZER Temperature, and DEFROST-SENSOR temperature for defrosting and the indoor temperature for compensating for the surrounding temperature into MICOM. OPENING or SHORT state of each TEMPERATURE SENSOR are as follows: SENSOR CHECK POINT...
  • Page 31 8-2-6 Refrigeration Compartment Stepping Motor Damper Circuit * The circuit shown below is the damper circuit to regulate the refrigerator temperature. 8-2-7 Dispenser Input - 31 -...
  • Page 32 8-2-8 Temperature Compensation & Overcooling/Undercooling Compensation Circuit 1. Refrigerator Temperature Compensation Table of Temperature Compensation by adjusting the Refrigerator resistance (difference from the current temperature) Resistance Temperature Remark e.g., If the refrigerator compensation resistance (RCR) Compensation (RCR) is changed from 10K (the current resistance) to 18K (the adjustment resistance), the temperature 180 K +2.5°C...
  • Page 33 8-2-9 Key Button Input & Display Light-On Circuit The circuit shown above determines whether a function control key on the operation display is pushed. It also turns on the corresponding function indication LED Module SEVEN SEGMENT DISPLAY. The drive type is the scan type. - 33 -...
  • Page 34 8-3 RESISTANCE SPECIFICATION OF SENSOR RESISTANCE OF FREEZER RESISTANCE OF REFRIGERATOR & TEMPERATURE SENSOR DEFROST SENSOR & ROOM SENSOR - 20 ˚C 22.3 K 77 K - 15 ˚C 16.9 K 60 K - 10 ˚C 13.0 K 47.3 K - 5 ˚C 10.1 K 38.4 K...
  • Page 35 - 35 -...
  • Page 36 - 36 -...
  • Page 37 8-5 MAIN PWB ASSEMBLY AND PARTS LIST 8-5-1 Main PWB Assembly - 37 -...
  • Page 38 8-5-2 Replacement Parts List - 38 -...
  • Page 39 8-5-3 PWB Assembly, Display, And Parts List - 39 -...
  • Page 40 8-5-4 Circuit Diagram of Display - 40 -...
  • Page 41 8-6 PWB DIAGRAM 8-6-1 PWB Main Assembly - 41 -...
  • Page 42 - 42 -...

  • Page 43: Exploded View & Replacement Parts List

    #EV# 9. EXPLODED VIEW & REPLACEMENT PARTS LIST CASE PARTS CAUTION: Use the part number to order part, not the position number. 207B 402A 103B 406C 271C 271B 103A 624C 410A 207A 409D 624A 624B 406D 501F 402A 624D 271B 271A 610B 282F...
  • Page 44 #EV# FREEZER PARTS CAUTION: Use the part number to order part, not the position number. 145C 136B 145F 248F 131A 237C 177B 136A - 44 -...
  • Page 45 #EV# REFRIGERATOR PARTS CAUTION: Use the part number to order part, not the position number. 147C 141B 141A 147B 147A 141B 141A 141C 141B 141A 141C 141B 141A 141C 146A 141D 141C 161E 167B 161A 154A 161D 160B 151C 151A 161C 248A 155J...

  • Page 46: Door Parts

    #EV# DOOR PARTS CAUTION: Use the part number to order part, not the position number. 230B 230A 231B 233B 233C 231A 233D 233A 241A 241B 212G 241C 237A 241C 237A 244D 241C 244E 244D 244E 241C 241C 262C 262C 243A 249A 243A 312B...
  • Page 47 #EV# DISPENSER PARTS CAUTION: Use the part number to order part, not the position number. 616B 280F 280D 279B 279D 276A 113C 276B 279E 403A 616A 406E 279C - 47 -...
  • Page 48 #EV# ICE & MAKER PARTS CAUTION: Use the part number to order part, not the position number. 602A 600A 617A 625A 616G 616D 616G 623B 616C 616H 616F 623B 616H 616E 627A 603A 616F 623A 627B 619A 603B - 48 -...
  • Page 49 P/No. 3828JL8033B OCT., 2004 Printed in Korea...

This manual is also suitable for:

Gr-f218Gr-f258

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