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LG LRTN19310 manual

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Table of contents for the manual

  • Page 1

    CAUTION BEFORE SERVICING THE UNIT, READ THE SAFETY PRECAUTIONS IN THIS MANUAL. REFRIGERATOR SERVICE MANUAL models LRTN19310 ** LR TN22310 **[...]

  • Page 2

    SAFETY PRECAUTIONS ....................................................................................................................................................... 2 SPECIFICA TIONS..................................................................................................................................................................[...]

  • Page 3

    Ref. No.: 19Cuft / 22Cuft - 3 - 1. SPECIFICA TIONS ITEMS SPECIFICA TIONS DOOR DESIGN Slide Rounded DIMENSIONS (mm) 755 X 806 X 1664 (W X D X H ) - 19 Cu.ft 831 X 806 X 1715 (W X D X H ) - 22 Cu.ft NET WEIGHT (kg) 91 (19 cu.ft) 101 (22 cu.ft) COOLING SYSTEM Fan Cooling TEMPERA TURE CONTROL Micom Control DEFROSTING SYSTEM Full Automatic Heater Defros[...]

  • Page 4

    2. P ARTS IDENTIFICA TION - 4 - FREEZER COMPARTMENT REFRIGERATOR COMPARTMENT Ice Bin Freezer Shelf Digital Sensor Control Snack Corner Shelves Crisper Keeps fruits and vegetables fresh and crisp. Freezer Door Bin Door Bin Egg Tray Refrigerator Door Rack Base Grille Can Dispenser Dairy Bin[...]

  • Page 5

    3-1 DOOR ● Freezer Door 1. Remove the hinge cover by pulling it upwards. 2. Loosen hexagonal bolts attaching the upper hinge to the body and lift the freezer door . 3. Pull out the door gasket to remove from the door foam assembly . ● Refrigerator Door 1. Loosen hexagonal bolts attaching the lower hinge to the body to remove the refrigerator do[...]

  • Page 6

    3-3 F AN AND F AN MOTOR 1. Remove the freezer shelf. (If your refrigerator has an icemaker , remove the icemaker first) 2. Remove the grille by pulling it out and by loosening a screw . 3. Remove the Fan Motor assembly by loosening 4 screws and disassemble the shroud. 4. Pull out the fan and separate the Fan Motor and Bracket. 3-4 DEFROST CONTROL A[...]

  • Page 7

    4-1 COMPRESSOR 4-1-1 Role The compressor intakes low temperature and low pressure gas from the evaporator of the refrigerator and compresses this gas to high-temperature and high-pressure gas. It then delivers the gas to the condenser . 4-1-2 Composition The compressor includes overload protection. The PTC starter and OLP (overload protector) are a[...]

  • Page 8

    4-3 OLP (OVERLOAD PROTECTOR) 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 OL[...]

  • Page 9

    GOOD MODEL 5. CIRCUIT DIAGRAM - 9 -[...]

  • Page 10

    6. TROUBLESHOOTING - 10 - 6-1 COMPRESSOR AND ELECTRIC COMPONENTS Readings OK Open or short 1 2 3 4 5 2 5 5 3 5 4 5 5 1 4 3 YES YES Readings OK Readings OK Open or short Open or short YES YES NO NO Power Source. No V oltage. (Reated V oltage ± 10%)? Replace OLP . Reconnect. Replace PTC-Starter . Replace OLP . Check connection condition. OLP disconn[...]

  • Page 11

    - 11 - 6-2 PTC AND OLP 6 5 Shows continuity Open Normal operation of Compressor is impossible or poor . Separate PTC-Starter from Compressor and measure resistance between No. 5 and 6 of PTC-Starter with a T ester .(Figure 12) Separate OLP from Compressor and check resistance value between two terminals of OLP with a T ester . (Figure 13) Observati[...]

  • Page 12

    - 12 - ▼ Not cooling at all ▼ Poor cooling performance Compressor doesn't run. Compressor runs poorly . Check a starting voltage. Check for open short or incorrect resistance readings in the following components a. Starting devices b. OLP c. Compressor coil d. Wiring harness Low voltage. Short, open or broken. Poor contact or shorted. Coil[...]

  • Page 13

    6-4 SERVICE DIAGNOSIS CHART - 13 - COMPLAINT POINTS TO BE CHECKED REMEDY ● Other possible problems: Check if frost forms in the freezer . Check Components of the defrosting circuit. Check the refrigeration system. Check the Thermistor . Not defrosting. The system is faulty . Perform sealed system repair . Replace the Thermistor . The operation of[...]

  • Page 14

    6-5 REFRIGERA TING CYCLE - 14 - ▼ T roubleshooting Chart ▼ Leakage Detection YES YES Check if compressor runs. Check if frost forms in Evaporator . Observe the discharged amount of Refrigerant. Inject refrigerant in compressor and check cooling operation. Clogged by dust. Gas leakage. Faulty Compressor . Moisture Clog Check if oil leaks. Frost [...]

  • Page 15

    - 15 - NO. ITEMS UNIT ST ANDARDS PURPOSES REMARKS ▼ General Control of Refrigerating Cycle Pipe and piping system opening time Welding N 2 sealed parts Refrige- ration Cycle Refrigerant weighing Drier replacement Leak check 1 2 3 4 5 6 7 Min. Nitrogen pressure Confirm N 2 leak Min. T orr EA EA EA EA Pipe: within 1 hour . Comp: within 10 minutes. [...]

  • Page 16

    7-1 FUNCTION 7-1-1 Function 1. When the appliance is plugged in, it is set to "3" for the Refrigerator . Y ou can adjust the Refrigerator control temperature by pressing the ADJUST button. 2. When the power is initially applied or restored after a power failure, it is automatically reset to "3". 7-1-2 Defrost Cycle 1. A defrost [...]

  • Page 17

    - 17 - 7-1-4 Defect Diagnosis Function 1. Defect diagnosis functions are easy SVC when defects occur which can affect product performance. 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. The defect CODE sh[...]

  • Page 18

    7-1-5 TEST Mode 1. The T est 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 button is on the main PCB of the refrigerator (T est S/W). The test mode will be cleared in 2 hours regardless of the type of test mode. 3. While in the test mode, the ADJUST button wi[...]

  • Page 19

    7-2 PCB FUNCTION 7-2-1 Power Circuit 1. Power is supplied to the control board at pins 1 and 5 of connector #4. - 19 -[...]

  • Page 20

    7-2-2 Load / Buzzer Drive & Open Door Detection Circuit 1. Load Drive Condition Check T o measure outputs of the control board, check voltages between the pins for the following components: NOTE: When the door of the freezer/refrigerator is left open for 7 minutes or longer , the lamp of the freezer/refrigerator turns off automatically . - 20 -[...]

  • Page 21

    2. Open Door Circuit (Door Monitor Circuit) - 21 - Freezer or Refrigerator Measurement between pins 5 and 6 at Con 3 Both Closed 0 volts One door open 5 volts[...]

  • Page 22

    7-2-3 T emperature Sensor Circuit V oltage supplied to each sensor wil range between 0.5 volts -22 ° F(-30 ° C) and 4.5 volts 122 ° F(50 ° C) depending upon the temperature in the compartments. A measurement of 0 volts indicates a short in the sensor circuit. A measurement of 5 volts indicates an open in the sensor circuit. - 22 -[...]

  • Page 23

    - 23 - 7-3 RESIST ANCE SPECIFICA TION OF SENSOR • The resistance of the SENSOR has a ± 5% common difference. • Measure the resistance of the SENSOR after leaving it for over 3 minutes in the measuring temperature. This delay is necessary due to sensor response speed. • Measure the F-SENSOR, SUPER FROST SENSOR, R1, R2-SENSOR after disconnect [...]

  • Page 24

    - 24 - 7-4 TROUBLESHOOTING COMPLAINT Electronic Display not operating correctly Not Cooling Not cold enough Not defrosting 1. No Display at all 2. Partial or abnormal display 1. Display on but compressor not operating 2. Display on compressor is operating 1. Frosted up in Freeer 1. Supply voltage not within specifications 2. Open in wiring harness [...]

  • Page 25

    7-5 MAIN PWB ASSEMBL Y AND P ARTS LIST 7-5-1 Main PWB Assembly - 25 -[...]

  • Page 26

    CASE P ARTS CAUTION: Use the part number to order part, not the position number . - 26 - 8. EXPLODED VIEW & REPLACEMENT P ARTS LIST 106A 106A 315A 401A 304A 501A 411A 410G 501F S01 309A 318A 308A S07 314A 307A 312A 317A S06 S09 310A 327A 103A 105A 301A 283E 103B 328A 145B 145A 282H B02 S13 282B 406B 418A 281A B01 281B 103C 305B 305B 305C 305C B[...]

  • Page 27

    FREEZER P ARTS CAUTION: Use the part number to order part, not the position number . - 27 - 405C 404A 405A S20 330B S21 332A 149A 149B 284C 284A 329A 110D S22 147B 125A 131A[...]

  • Page 28

    REFRIGERA T OR P ARTS CAUTION: Use the part number to order part, not the position number . - 28 - 128A 170A 141B 141C 141A 141B 141C 141A 141C 141A 141B 141B 141C 141A 141C 141A 141B 154A 167B 151A 155B 151A 151C 128B[...]

  • Page 29

    DOOR P ARTS CAUTION: Use the part number to order part, not the position number . - 29 - 241C 241C 205D 233A 203A 200A 201A 231A 281D 281D 281E 281E 234B 244A * S25 * S25 * 244B * S25 * 212A * S25 * S25 * S25 * 210A S26 210B 201A 281D 281E 244B * 212A * 607A * 607A * 244C * 243A 283F 231A 281D 281E S27 244B * 244A * 607A * 607A * 244C * 230A S25 * [...]

  • Page 30

    P/No. 3828JL8015A MAR., 2003 Printed in Korea[...]