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LG LRTN19310 Series Service Manual
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LG LRTN19310 Series Service Manual

Lg refrigerator service manual
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REFRIGERATOR
SERVICE MANUAL
CAUTION
BEFORE SERVICING THE UNIT,
READ THE SAFETY PRECAUTIONS IN THIS MANUAL.
models
LRTN19310
LRTN22310
**
**

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Summary of Contents for LG LRTN19310 Series

  • Page 1 REFRIGERATOR SERVICE MANUAL CAUTION BEFORE SERVICING THE UNIT, READ THE SAFETY PRECAUTIONS IN THIS MANUAL. models LRTN19310 LRTN22310...

  • Page 2: Table Of Contents

    9. When servicing the evaporator, wear cotton gloves. This is to prevent injuries from the sharp evaporator fins. 10. Service on the refrigerator should be performed by a qualified technician. Sealed system repair must be performed by a CFC certified technician.

  • Page 3: Specifications

    1715 (W H) - 22 Cu.ft EVAPORATOR CONDENSER REFRIGERANT LUBRICATING OIL DEFROSTING DEVICE LAMP - 3 - SPECIFICATIONS Opaque Drawer Type PTC Starting Type Fin Tube Type Wire Condenser R-134a (155 g) Freol@10G (310 cc) SHEATH HEATER REFRIGERATOR 60 W (1EA)

  • Page 4: Parts Identification

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

  • Page 5: Disassembly

    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 door only. 2. Pull out the door gasket to remove from the door foam assembly. 3-2 DOOR SWITCH 1.

  • Page 6: Fan And Fan Motor

    3-3 FAN AND FAN 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.

  • Page 7: Adjustment

    4. ADJUSTMENT 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.

  • Page 8: Olp (Overload Protector)

    4-3-2 Role of the OLP (1) The OLP is attached to the Sealed Compressor used for the Refrigerator. It prevents the Motor Coil from being started in the Compressor. (2) For normal operation of the OLP, do not turn the Adjust Screw of the OLP in any way.

  • Page 9: Circuit Diagram

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

  • Page 10: Troubleshooting

    6. TROUBLESHOOTING 6-1 COMPRESSOR AND ELECTRIC COMPONENTS Remove PTC-Starter Power Source. from Compressor and measure voltage between Terminal C of Compressor and Terminals 5 or 6 of PTC. No Voltage. Applied voltage isn't in range of Rating Voltage ±10%. Check Check resistance between M-C, S-C and resistance of...

  • Page 11: Ptc And Olp

    6-2 PTC AND OLP Normal operation of Separate PTC-Starter Compressor is from Compressor and measure resistance impossible or poor. between No. 5 and 6 of PTC-Starter with a Tester.(Figure 12) Separate OLP from Compressor and check resistance value between two terminals of OLP with a Tester.

  • Page 12: Other Electrical Components

    6-3 OTHER ELECTRIC COMPONENTS M Not cooling at all Check for open short or Compressor incorrect resistance readings doesn't run. in the following components a. Starting devices b. OLP c. Compressor coil d. Wiring harness M Poor cooling performance Compressor runs Check a starting poorly.

  • Page 13: Service Diagnosis Chart

    • Is the ambient temperature too high or the room door closed? • Check if food put in the refrigerator is hot. • Did you open the door of the unit too often or check if the door is sealed properly? •...

  • Page 14: Refrigeration Cycle

    Refrigerator don't cool normally. PARTIAL Freezer RESTRICTION compartment and Refrigerator don't cool normally. WHOLE Freezer RESTRICTION compartment and Refrigerator don't cool. formed. MOISTURE Cooling operation RESTRICTION stops periodically. COMP- Freezer and RESSION Refrigerator don't cool. NO COMP- No compressing RESSION operation.
  • Page 15 Note: Winter: -5g Drier - Use R-134a exclusively for replacement R-134a refrigerator. - Replace drier whenever repairing refrigerator cycle piping. Leak check - Do not use soapy water for check. It may be sucked into the pipe by a vacuum. STANDARDS...

  • Page 16: Description Of Function & Circuit Of Micom

    7-1 FUNCTION 7-1-1 Function 1. When the appliance is plugged in, it is set to "3" for the Refrigerator. You 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".
  • Page 17 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 shows on the refrigerator DISPLAY as temperature LED, and the other LED turns off. - ERROR CODE on Refrigerator Temperature panel...
  • Page 18 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 button is on the main PCB of the refrigerator (Test S/W). The test mode will be cleared in 2 hours regardless of the type of test mode.
  • 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 Circuit Compressor Condenser fan Evaporator fan Defrost heater F,R-lamp 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. Pin Number Pin Number Con1 pin1 Con4 pin1...
  • Page 21 2. Open Door Circuit (Door Monitor Circuit) Freezer or Refrigerator Measurement between pins 5 and 6 at Con 3 Both Closed 0 volts One door open 5 volts - 21 -...
  • Page 22 7-2-3 Temperature Sensor Circuit Voltage 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.
  • Page 23 6.2 KΩ 4.9 KΩ 3.9 KΩ 3.1 KΩ 2.5 KΩ 2.0 KΩ 1.4 KΩ 0.8 KΩ - 23 - RESISTANCE OF REFRIGERATOR & DEFROST SENSOR 77 KΩ 60 KΩ 47.3 KΩ 38.4 KΩ 30 KΩ 24.1 KΩ 19.5 KΩ 15.9 KΩ...
  • Page 24 - 24 -...
  • Page 25 7-5 MAIN PWB ASSEMBLY AND PARTS LIST 7-5-1 Main PWB Assembly - 25 -...

  • Page 26: Exploded View & Replacement Parts List

    8. EXPLODED VIEW & REPLACEMENT PARTS LIST CASE PARTS CAUTION: Use the part number to order part, not the position number. 103A 501F 410G 411A 501A 304A 105A 317A 318A 328A 327A 307A 314A 308A 309A 323B 420A 312A 329C 319A 305C 319C...
  • Page 27 FREEZER PARTS CAUTION: Use the part number to order part, not the position number. 330B 332A 110D 405C 405A 284A 404A 329A 284C 147B 125A 131A 149A 149B - 27 -...

  • Page 28: Refrigerator Parts

    REFRIGERATOR PARTS CAUTION: Use the part number to order part, not the position number. 141A 141B 141C 128B 141B 141A 141C 141B 141A 141C 141B 141A 141C 170A 141B 141A 128A 141C 167B 154A 155B 151A 151C - 28 -...

  • Page 29: Door Parts

    DOOR PARTS CAUTION: Use the part number to order part, not the position number. 205D 205D 234B 241A 241C 241C 241D : on some models 200A 203A 201A 281E 281E 212A 241B 230A 233A 231A 241C 281E 281E 244A 244B - 29 - 281D 281D...
  • Page 30 P/No. 3828JL8015A MAR., 2003 Printed in Korea...

This manual is also suitable for:

Lrtn22310 series

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