LG LREL6321S Service Manual
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LG LREL6321S Service Manual

LG LREL6321S Service Manual

30" freestanding electric range
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Confidential
30" FREESTANDING
ELECTRIC RANGE
SERVICE MANUAL
CAUTION
BEFORE SERVICING THE UNIT, READ THE SAFETY PRECAUTIONS IN THIS MANUAL.
MODEL: LREL6321S
Any reproduction, duplication, distribution (including by way of email, facsimile or other electronic means), publication,
modification, copying or transmission of this Service Manual is STRICTLY PROHIBITED unless you have obtained the
prior written consent of the LG Electronics entity from which you received this Service Manual.
The material covered by this prohibition includes, without limitation, any text, graphics or logos in this Service Manual.
Copyright © 2020 LG Electronics Inc. All rights reserved. Only training and service purposes
MFL71688305_Rev00. 05142020

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  • Page 1 Service Manual is STRICTLY PROHIBITED unless you have obtained the prior written consent of the LG Electronics entity from which you received this Service Manual. The material covered by this prohibition includes, without limitation, any text, graphics or logos in this Service Manual.
  • Page 2 SAFETY PRECAUTIONS • Repairs of the appliance should be carried out by a licensed technician only. Incorrect repairs may result in dangerous situations. If you need repairs, contact an LG Service Center or your dealer. • If the power cord is defective, it must be replaced by a qualified service agent with a UL listed range cord.

  • Page 3: Table Of Contents

    • Removing the Side Panel - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 3-14 Copyright © LG Electronics Inc. All rights reserved. Only training and service purposes...
  • Page 4 EXPLODED VIEW - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 11-1 ~ 11-6 Copyright © LG Electronics Inc. All rights reserved. Only training and service purposes...

  • Page 5: General

    • Be careful when removing and lifting the door. • DO NOT lift the door by the handle. - Failure to do so can result in personal injury as the door is very heavy. Copyright © LG Electronics Inc. All rights reserved. Only training and service purposes...
  • Page 6 - Storage drawer : Remove drawer and verify leveling leg is inserted into and fully secured by the anti-tip devices. Refer to the installation manual for proper anti-tip bracket installation. Copyright © LG Electronics Inc. All rights reserved. Only training and service purposes...
  • Page 7 • Be sure you know which control pads operate each surface unit. Make sure you turned on the correct surface unit. Copyright © LG Electronics Inc. All rights reserved. Only training and service purposes...

  • Page 8: Model & Serial Number Label And Tech Sheet Locations

    MODEL & SERIAL NUMBER LABEL AND TECH SHEET LOCATIONS The Model/Serial Number label and Tech Sheet locations are shown below. Model & Serial Number Location Tech Sheet Location (On Rear Cover) Copyright © LG Electronics Inc. All rights reserved. Only training and service purposes...

  • Page 9: Specifications

    Exterior - Depth 26 1/2 (Door), 28 15/16 (with handle) Net weight: Lbs (Kg) 144.2lbs (65.4kg) 120/240V : 13.1 kW , 120/208V : 9.8 kW Power Rating Copyright © LG Electronics Inc. All rights reserved. Only training and service purposes...

  • Page 10: Using Your Range

    All foods should be turned at least once except fish, which does not need to be turned. Broil element Hidden bake element Copyright © LG Electronics Inc. All rights reserved. Only training and service purposes...

  • Page 11: Control Panel Features

    Smart Diagnosis™ Flashing Time Cooktop Control If your oven displays a flashing clock, press Clock or press any key to stop the flashing. Copyright © LG Electronics Inc. All rights reserved. Only training and service purposes...

  • Page 12: To Turn On A Single Surface Unit (Right Rear, Left Rear)

    Press during cooking or Erase during programming. Settings again to add a minus sign if decreasing the temperature. Start 3. Press to accept the change. Copyright © LG Electronics Inc. All rights reserved. Only training and service purposes...

  • Page 13: Preheating Alarm Light On/Off

    START Desired START TIME start time * This feature can also be used with the: CONVECTION BAKE and CONVECTION ROAST modes. 10. BROIL ONCE HIGH START TWICE Copyright © LG Electronics Inc. All rights reserved. Only training and service purposes...

  • Page 14: Component Access

    This section instructs you on how to service each component inside the range. The components and their locations are shown below. COMPONENT LOCATIONS Main PCB Surface Elements Oven Sensor Door Switch Oven Light Broil Heater Hinge Hanger Bake Heater Copyright © LG Electronics Inc. All rights reserved. Only training and service purposes...

  • Page 15: Removing The Rear, Motor Cover And Control Assembly

    4. Remove the 20 screws from the rear cover and remove the cover. Control Cover Rear Cover 8. Replace the control panel assembly. Main PCB Regulator Motor Cover Support Support Barrier Control panel Assembly Copyright © LG Electronics Inc. All rights reserved. Only training and service purposes...

  • Page 16: Removing Pcbs (Main Pcb And Main Pcb, Tact&Display Pcb And Wifi Pcb)

    2. Pull the range away from the wall so that you can access the rear panel. 3. Remove the lamp, controller and back cover. (See the page 3-2) Copyright © LG Electronics Inc. All rights reserved. Only training and service purposes...
  • Page 17 Open oven door and remove the 3screws located at the front of the cook-top, then close the door. Step. 5 Lift up the cooktop assembly and turn the cooktop assembly over (protect the cooktop surface). Copyright © LG Electronics Inc. All rights reserved. Only training and service purposes...

  • Page 18: Removing The Broil Element

    2. Open the oven door and remove the racks from inside the oven. 3. To remove the outer broil element: a) Remove the 4 screws from the front and rear brackets. 2 front bracket screws Copyright © LG Electronics Inc. All rights reserved. Only training and service purposes...

  • Page 19: Removing The Hidden Bake Element

    180 degrees. (shown as below: assembly sequence 1→ 2) 6. Use the nipper to cut the 10 connections on the Bake heater cover and Rear panel. Copyright © LG Electronics Inc. All rights reserved. Only training and service purposes...

  • Page 20: Removing The Oven Light & Socket Assembly

    4. Insert a n bulb and replace bulb cover by 6. Disconnect the wires from the socket terminals. turning clockwise. Glass cover & Bulb Inner Ring Glass cover & Bulb Outer Ring <Viewed From Rear Panel> Copyright © LG Electronics Inc. All rights reserved. Only training and service purposes...

  • Page 21: Removing The Oven Temperature Sensor

    Remove rear cover & motor cover (See step 3~4 on page 3-2) c) Disconnect the wire connection. d) Remove the oven sensor. Oven temperature sensor Wire connection 1 screws Copyright © LG Electronics Inc. All rights reserved. Only training and service purposes...

  • Page 22: Removing & Replacing The Drawer

    1. Place the drawer rails on the guides. 2. Push the drawer back until it stops. 3. Lift the front of the drawer and push back until the stops clear the guides. Copyright © LG Electronics Inc. All rights reserved. Only training and service purposes...

  • Page 23: Removing & Replacing The Lift-Off Oven Door

    Lift door up and out until the hinge arm is clear of the Close the oven door. Hinge slot. lock Hinge arm Hinge arm Bottom edge of Bottom slot edge of 3-10 slot Copyright © LG Electronics Inc. All rights reserved. Indentation Only training and service purposes Indentation...

  • Page 24: Removing The Oven Door Handle

    3. Remove the 2 top door screws. 2 Top liner screws Bracket 4. Remove the 7 bottom screws from the door liner. 7 screws 3-11 Copyright © LG Electronics Inc. All rights reserved. Only training and service purposes...
  • Page 25 Glass & Bracket edge. c) Remove the 4 top door screws. d) Lift the hinge hanger out of the door liner slot. Hinge Door frame 3-12 Copyright © LG Electronics Inc. All rights reserved. Only training and service purposes...

  • Page 26: Removing The Oven Door Gasket

    1. Open the oven door to its fully down position. 2. Pull the oven door gasket clips out of the liner holes until all of the clips are removed. Liner Hole 3-13 Copyright © LG Electronics Inc. All rights reserved. Only training and service purposes...

  • Page 27: Removing The Side Panel

    5. Raise the cooktop assembly (See the page 3-5 For the procedure). NOTE: put the cooktop assembly down on the side panel which is not detached. 6. Remove 4 screws from the side panel. 3-14 Copyright © LG Electronics Inc. All rights reserved. Only training and service purposes...

  • Page 28: Component Test

    1.09 kΩ ± 10% 2. Measure the resistance after cooling down If not replace (Multiple meter scale: R x 1000) NOTE: Ω Value was tested at room temperature (77F/25˚C) Copyright © LG Electronics Inc. All rights reserved. Only training and service purposes...

  • Page 29: Door Switch

    Normal : Approximately 13.7Ω 2. Measure resistance after cooling down Abnomal : Infinite(opened) NOTE: Ω Value was tested at room temperature (77F/25˚C) Be careful the element is sensitive to temperature. Copyright © LG Electronics Inc. All rights reserved. Only training and service purposes...

  • Page 30: Single Surface Unit(Lr, Rr)

    With the temperature below 150˚F, the meter should indicate an open circuit(infinite). Above 150˚F With the temperature above 150˚F, the meter → continuity (0 Ω) should indicate continuity (0Ω). Copyright © LG Electronics Inc. All rights reserved. Only training and service purposes...

  • Page 31: Dual Surface Unit(Lf,Rf)

    With the temperature below 150˚F, the meter should indicate an open circuit(infinite). Above 150˚F With the temperature above 150˚F, the meter  continuity (0 Ω) should indicate continuity (0 Ω). Copyright © LG Electronics Inc. All rights reserved. Only training and service purposes...

  • Page 32: Center Rear(Cr): Warming Zone

    4. Touch the ohmmeter test leads to the between element terminal. The meter should indicate 571 Ω ± 10% Normal: Approximately 571 Ω, If not replace Element terminal Copyright © LG Electronics Inc. All rights reserved. Only training and service purposes...

  • Page 33: Composition Of Control

    COMPOSITION OF CONTROL Wiring Diagram Copyright © LG Electronics Inc. All rights reserved. Only training and service purposes...

  • Page 34: Main Pcb

    COMPOSITION OF CONTROL Main PCB Front Back Tact & Display PCB Controller assembly Copyright © LG Electronics Inc. All rights reserved. Only training and service purposes...

  • Page 35: Led Module

    COMPOSITION OF CONTROL Main PCB Tact & Display PCB LED Module Copyright © LG Electronics Inc. All rights reserved. Only training and service purposes...

  • Page 36: Check The Failure Code

    If the oven do not has any failure, the Oven will show it like FIG. 2 < FIG. 2 > NOTE: After checking for the F code, press the “CLEAR” key to remove all codes. Copyright © LG Electronics Inc. All rights reserved. Only training and service purposes...

  • Page 37: Failure Code Summary

    150 ˚F and max oven temperature is less equal than start oven temp. Case 2: oven temperature is less equal than 100 ˚F over 5 minutes on preheating. Copyright © LG Electronics Inc. All rights reserved. Only training and service purposes...

  • Page 38: Basic Check Summary

    -. Check: related( Symptom : Oven hot(F6) -. Check: : All heater relays are open/short WIRE COLORS SYMBOL COLOR WHITE BLACK YELLOW PINK BLUE BROWN GREEN GRAY ORANGE VIOLET Copyright © LG Electronics Inc. All rights reserved. Only training and service purposes...

  • Page 39: Checking Flow Chart By Failure

    CHECKING FLOW CHART BY FAILURE Symptom Check Point 1. Power Failure 1. Check Electric Wiring (Dead) 2. Check the Main PCB 2. No Display Copyright © LG Electronics Inc. All rights reserved. Only training and service purposes...

  • Page 40: Power Failed(Dead), No Display

    Check the connection of Power If defective harness, Cord. Normal? replace or fix Reconnect. If defective harness, replace or fix Check the connection of Main PCB. (CN01) Nomal? Copyright © LG Electronics Inc. All rights reserved. Only training and service purposes...
  • Page 41 Check the connection of L1 and N Reconnect. at Terminal block. Normal? Check the Thermostat - Normal : Short Replace the Thermostat - Abnormal : Open Normal? Replace the main PCB Copyright © LG Electronics Inc. All rights reserved. Only training and service purposes...
  • Page 42 CN21 Main PCB CN21 Reconnect. If defective harness, replace or fix. If the same phenomenon occurs even though after fixed connection, you should replace the Display PCB Copyright © LG Electronics Inc. All rights reserved. Only training and service purposes...

  • Page 43: No Heating, F9

    CHECKING FLOW CHART BY FAILURE Symptom Check Point 1. No heating 1. Check Electric Wiring 2. F9 2. Check Heater’s Resistance. 3. Check the Sensor (thermistor). TAB01~06 CN10 CN10 Copyright © LG Electronics Inc. All rights reserved. Only training and service purposes...
  • Page 44 Reconnect. If defective harness, Is the Connector disconnected Replace or fix or loose? (1) Electric wiring of Relay PCB All taps. (2) Electric wiring of electric element Copyright © LG Electronics Inc. All rights reserved. Only training and service purposes...
  • Page 45 CHECKING FLOW CHART BY FAILURE Replace the failed igniter Check the resistance of each heater. Normal? (Measure the resistance after cooling down. The resistance is shown below) Copyright © LG Electronics Inc. All rights reserved. Only training and service purposes...
  • Page 46 2 seconds 4. “+” 3 click(t3)  Start Normal : Themistor value at room temp is from 70 ̊ F to 90 ̊ F as the above figure. Copyright © LG Electronics Inc. All rights reserved. Only training and service purposes...
  • Page 47 Is the resistance of thermistor normal? Thermistor Check Pin 1 and 2 of CN10 in main PCB. Normal – approximately 0.6~1K ohm at 25℃. CN10 Replace the Main PCB Copyright © LG Electronics Inc. All rights reserved. Only training and service purposes...

  • Page 48: Sensing Fail, F1, F2

    Symptom Check Point 1. Sensing Fail 1. Check the Electric wiring 2. F1 2. Check the sensor (thermistor) resistance 3. F2 CN10 CN10(Pin 1 and 2) 9-10 Copyright © LG Electronics Inc. All rights reserved. Only training and service purposes...
  • Page 49 Sensing Fail, F1, F2? Unplug the unit Reconnect or adjust the Is the Connector connection disconnected or loose? (1) Sensor connection (2) CN10 of Main PCB Sensor connection CN10 9-11 Copyright © LG Electronics Inc. All rights reserved. Only training and service purposes...
  • Page 50 Thermistor thermistor normal? Check : Pin 1 and 2 of CN10 of Main PCB Normal – approximately 0.6~1K ohm at 25℃ CN10 Replace the Main PCB 9-12 Copyright © LG Electronics Inc. All rights reserved. Only training and service purposes...

  • Page 51: Oven Hot, F-6

    CHECKING FLOW CHART BY FAILURE Symptom Check Point 1. Oven hot 1. Check the Resistance of the Relay. 2. F-6 TAB01~06 CN10 9-13 Copyright © LG Electronics Inc. All rights reserved. Only training and service purposes...
  • Page 52 CHECKING FLOW CHART BY FAILURE F6(Oven Hot) Unplug the unit Check the DLB Relay damage Replace the Main PCB (measure the resistance) Normal Abnormal 9-14 Copyright © LG Electronics Inc. All rights reserved. Only training and service purposes...
  • Page 53 Replace the Main PCB thermistor normal? Check : Pin 1 and 2 of CN10 of Main PCB Normal – approximately 0.6~1K ohm at 25℃ CN10 Replace the Thermistor 9-15 Copyright © LG Electronics Inc. All rights reserved. Only training and service purposes...
  • Page 54 CHECKING FLOW CHART BY FAILURE Symptom Check Point 1.Key not working Check the Key working 2.F3 CN20 9-16 Copyright © LG Electronics Inc. All rights reserved. Only training and service purposes...
  • Page 55 Does the beep sound when the power is turned on again? Reconnect or adjust the connection Is the connector disconnected or loose? Check : CN20 Is it OK? CN20 CN20 Replace the Display PCB 9-17 Copyright © LG Electronics Inc. All rights reserved. Only training and service purposes...

  • Page 56: Trouble Shooting

    • Repair or replace wiring • Loose or bad wiring • Check light socket for continuity. • Defective light socket. • Test and/or replace door switch • Defective door switch 10-1 Copyright © LG Electronics Inc. All rights reserved. Only training and service purposes...
  • Page 57 • Use oven for baking only element used to heat the home) Oven door difficult to open • Worn or broken broil stop roller. • Replace oven door hinge 10-2 Copyright © LG Electronics Inc. All rights reserved. Only training and service purposes...
  • Page 58 (page 7-1) Oven temperature too hot • Oven sensor needs to be adjusted • See “the adjusting your oven temperature” or too cold in owners manual 10-3 Copyright © LG Electronics Inc. All rights reserved. Only training and service purposes...

  • Page 59: Exploded View

    #EV# EXPLODED VIEW INTRODUCTION MODEL: Customer Model Product Code SVC Model CONTROLLER PARTS COOKTOP PARTS DOOR PARTS CAVITY PARTS DRAWER PARTS Copyright © LG Electronics Inc. All rights reserved. Only training and service purposes...
  • Page 60 DOOR PARTS W243 102U 1801 W225 1000 102S W225 1028 1733 1020 W222 1704 1735 1021 W101 W321 W108 1009 1466 1733 W101 W321 102S 1704 102L Copyright © LG Electronics Inc. All rights reserved. Only training and service purposes...
  • Page 61 #EV# CONTROLLER PARTS 2006 2374 3075 2050 2381 2084 2052 2087 2441 2084 2034 H211 2037 2028 H212 2128 2036 H213 Copyright © LG Electronics Inc. All rights reserved. Only training and service purposes...
  • Page 62 #EV# COOKTOP PARTS 3056 3401 3303 3022 3204 3302 3303 3302 3204 3204 3204 3207 3014 Copyright © LG Electronics Inc. All rights reserved. Only training and service purposes...
  • Page 63 #EV# DRAWER PARTS 8603 8530 8514 8501 8507 8530 850L 850R 8524 8508 3541 3036 851D 8503 3541 851D Copyright © LG Electronics Inc. All rights reserved. Only training and service purposes...
  • Page 64 5016 5641 W301 5512 5516 5506 W225 5021 5508 W230 5532 5512 W301 W225 5533 5556 W230 W229 5515 5510 9381 5514 5014 5401 8511 3501 5032 Copyright © LG Electronics Inc. All rights reserved. Only training and service purposes...

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