LG LREL6323 Series Service Manual Download

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Confidential

MFL71688303_Rev00. 05112020

30" FREESTANDING

ELECTRIC RANGE

SERVICE MANUAL

CAUTION

BEFORE SERVICING THE UNIT, READ THE SAFETY PRECAUTIONS IN THIS MANUAL.

MODEL: LREL6323*

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.

Summary of Contents for LREL6323 Series

Page 1: ...le 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...

Page 2: ... 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 Electrical leads and cables should not be allowed to touch the oven Rating plate is located on the left side of warming drawer The power supply of the appliance should be turned off when it is being repaired FORWARD LG Electronics assumes ...

Page 3: ...F or C Bake Timed Bake Delayed Timed Bake Broil Warm Oven Lockout Changing hour mode on clock 12HR 24HR Self Clean Easy Clean Auto Conversion COMPONENT ACCESS 3 1 3 17 Component Locations 3 1 Removing the Rear Motor Cover and Control Assembly 3 2 Removing PCBs Main PCB Tact Display PCB and WiFi PCB 3 3 Removing the Surface Element and the Ceramic Glass Cooktop 3 4 Removing the Door Latch Door Swit...

Page 4: ...rface unit RF 4 6 Center Rear CR Warming Zone 4 7 COMPOSITION OF CONTROL 5 1 5 3 Wiring Diagram 5 1 Key Matrix 5 2 Main PCB 5 3 Tact Display PCB 5 3 LED Module 5 3 CHECK THE FAILURE CODE 6 1 FAILURE CODE SUMMARY 7 1 BASIC CHECK SUMMARY 8 1 CHECKING FLOW CHART BY FAILURE 9 1 9 20 Power Failed Dead No display 9 1 9 4 No heating F9 9 5 9 9 Door Lock System Failure F10 9 10 9 12 Sensing Fail F1 F2 9 1...

Page 5: ...ONNECT all grounding devices Failure to do so can result in severe personal injury death or electrical shock DO NOT touch heating elements or interior surfaces of oven Heating element may be hot even though they are dark in color Interior surfaces of an oven become hot enough to cause burns During and after use do not touch or let clothing or other flammable materials contact heating elements or i...

Page 6: ...nti tip bracket installation WARNING DO NOT touch heating elements or interior surfaces of oven Heating element may be hot even though they are dark in color Interior surfaces of an oven become hot enough to cause burns During and after use do not touch or let clothing or other flammable materials contact heating elements or interior surfaces of oven until they have had sufficient time to cool Oth...

Page 7: ...is malfunctioning in the self clean mode Turn off or disconnect appliance from power supply and have serviced by a qualified technician VENTILATING HOODS Clean Ventilating Hoods Frequently Grease should not be allowed to accumulate on hood or filter When flaming foods under the hood turn the fan on OVEN Use Care When Opening Door Let hot air or steam escape before you remove or replace food in the...

Page 8: ...ghts reserved Only training and service purposes GENERAL The Model Serial Number label and Tech Sheet locations are shown below Model Serial Number Location MODEL SERIAL NUMBER LABEL AND TECH SHEET LOCATIONS Tech Sheet Location On Rear Cover ...

Page 9: ...ment Oven Interior W x H x D Exterior Width Exterior Height Exterior Depth Net weight Lbs Kg Rating 30 Freestanding STS Keypad Knob LED Yes Yes Yes Setting 6 categories 1 Set the hour mode on the clock 12 or 24 hours 2 Set the convection auto conversion function On Off 3 Adjust the oven temperature 4 Activate deactivate the preheating alarm light 5 Set the beeper volume Hi Lo Off 6 Switch the temp...

Page 10: ...oil Broil can be used to cook foods which are normally broiled All foods should be turned at least once except fish which does not need to be turned Convection Bake Roast Mode Upper element lower element Rear element some model and fan operate during convection bake Convection bake should be used for cooking casseroles and roasting meats Oven should be preheated for best results when using convect...

Page 11: ...sis 7 Cooktop Control COOKTOP HOT Indicator The COOKTOP HOT indicator appears in the display as long as any surface cooking area is too hot to touch It remains on after the element is turned off and until the surface has cooled to approximately 150 F The COOKTOP HOT indicator also appears during the self clean cycle Flashing Time If your oven displays a flashing clock press Clock or press any key ...

Page 12: ... 1 Touch START key to start oven 2 Touch CLEAR OFF key to cancel a program during cooking or Erase during programming USING YOUR RANGE 3 TO TURN ON OFF THE OVEN LIGHT The oven light automatically turns ON when the door is opened 1 The oven light may also be manually turned ON or OFF by press the OVEN LIGHT key 2 Knocking twice on the glass panel turns the interior light on or off Note 1 The oven l...

Page 13: ... Settings repeatedly until Unit appears in the display 2 Press 1 to select F Fahrenheit or C Celsius 3 Press Start to accept the change 9 BAKE TIMED BAKE DELAYED TIMED BAKE This feature can also be used with the CONVECTION BAKE and CONVECTION ROAST modes 10 BROIL START SELF CLEAN Once 4 hour Twice 5 hour 3 times 3 hour START KEEP WARM Press and hold the CLEAR OFF key for 3 seconds to activate or r...

Page 14: ... section instructs you on how to service each component inside the range The components and their locations are shown below COMPONENT LOCATIONS Oven Sensor Oven Light Surface Elements Main PCB Hinge Hanger Door Switch Door Latch Assembly Door Locking Motor Micro Switch Convection Motor Bake Heater Broil Heater ...

Page 15: ...e covers by removing the screw 4 Remove the 20 screws from the rear cover and remove the cover REMOVING THE REAR MOTOR COVER AND CONTROL ASSEMBLY WARNING DISCONNECT power supply cord from the outlet before servicing Replace all panels and parts before operating RECONNECT all grounding devices Failure to do so can result in severe personal injury death or electrical shock CAUTION Be careful when yo...

Page 16: ... 2 4 When you check PCB check the proper PCB in default mode and check main PCB NOTE Refer to the page 5 1 5 5 for composition of control board WARNING DISCONNECT power supply cord from the outlet before servicing Replace all panels and parts before operating RECONNECT all grounding devices Failure to do so can result in severe personal injury death or electrical shock CAUTION Be careful when you ...

Page 17: ...om mismating COMPONENT ACCESS CERAMICGLASSCOOKTOPREMOVAL Step 1 Unplug the cord or disconnect power Step 2 Remove lamp controller and back cover See the page 3 2 Step 3 Remove wiring from the cooktop assembly Step 4 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 cookto...

Page 18: ...ve the door switch a If not already done raise the cooktop See the page 3 4 for the procedure b Remove wiring from the door switch c Remove the door switch from the range To do this squeeze tab on the switch and push the switch in front 2 Screw An actuating rod Unhook the actuating rod Push WARNING DISCONNECT power supply cord from the outlet before servicing Replace all panels and parts before op...

Page 19: ...rear brackets b Pull the element forward so that you can access the terminals and disconnect the wires 2 front bracket screws 3 terminals Broil heater thermistor WARNING DISCONNECT power supply cord from the outlet before servicing Replace all panels and parts before operating RECONNECT all grounding devices Failure to do so can result in severe personal injury death or electrical shock CAUTION Be...

Page 20: ...ssembly sequence 1 2 COMPONENT ACCESS 1 Unplug range or disconnect power 2 Pull the range out of its mounting location so that you can access the rear of the unit 3 Remove rear and motor cover See the page 3 2 4 Remove 4 screws and a powercord 5 Remove 8 screws and detach the bake heater cover from the range Disconnect 2 wiring 2 bake heater receptacles 6 Use the nipper to cut the 10 connections o...

Page 21: ... can be replaced from inside oven COMPONENT ACCESS 5 To remove the fan motor assembly a REMOVE THE REAR MOTOR COVER AND CONTROL ASSEMBLY See the page 3 2 b Remove 3 screws from the fan motor bracket and disconnect 1 wiring connections c Pull the fan motor out of the rear panel and the motor can be detached REMOVING THE CONVECTION FAN BLADE AND FAN MOTOR CAUTION Be careful not to bend the fan blade...

Page 22: ...l the socket out of the liner NOTE If it is too difficult to remove the socket from the front of the oven you will have to push the socket out from the back of the unit Socket Clips 6 Disconnect the wires from the socket terminals Viewed From Rear Panel CAUTION Be careful not to scratch or chip the oven liner paint when you remove the oven light socket in the next step WARNING DISCONNECT power sup...

Page 23: ...grammed and started for the Self clean and Lock out mode PCB Power control board chip operates the motor 2 The cam moves the door hook connected to latch rod from unlocked position to locked position from locked Position to unlocked position 3 The cam activates the micro switch that causes the motor to stop 4 The locked status remains until the range temperature drops to approximately 500F after e...

Page 24: ...ws b Remove rear cover motor cover See step 3 4 on page 3 2 c Disconnect the wire connection d Remove the oven sensor WARNING DISCONNECT power supply cord from the outlet before servicing Replace all panels and parts before operating RECONNECT all grounding devices Failure to do so can result in severe personal injury death or electrical shock CAUTION Be careful when you work on the gas range hand...

Page 25: ... 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 4 Screw the 2 screws on the back of the drawer 2 screws 5 Lower the front of the drawer and push back until it closes CAUTION DO NOT touch interior surfaces of oven between door and drawer During and after use do not touch interior surfaces of oven between door and drawer unt...

Page 26: ...the locked position Step 5 Close the oven door To remove the door Step 1 Fully open the door Step 2 Pull the hinge locks down toward Fig 1 the door frame to the unlocked position Step 3 Firmly grasp both sides of the door at the top Step 4 Close door to the door removal position which is approximately 5 degrees refer to the Fig 2 Step 5 Lift door up and out until the hinge arm is clear of the slot...

Page 27: ...rface with the front glass facing down 3 Remove the 2 top door screws 4 Remove the 7 bottom screws from the door liner COMPONENT ACCESS REMOVING THE OVEN DOOR HANDLE Door Handle screw WARNING DISCONNECT power supply cord from the outlet before servicing Replace all panels and parts before operating RECONNECT all grounding devices Failure to do so can result in severe personal injury death or elect...

Page 28: ...age 3 14 b Place the door liner assembly on a padded work surface with the hinge hangers over the edge c Remove the 4 top door screws d Lift the hinge hanger out of the door liner slot 8 Lift the insulation cover inner oven door glass and bracket assembly out of the door liner Insulation Insulation cover Inner oven door Glass Bracket Insulation Hinge Insulation Door frame 4 top door screws ...

Page 29: ...e removed 3 Pull the ends of the gasket out of the liner holes WARNING DISCONNECT power supply cord from the outlet before servicing Replace all panels and parts before operating RECONNECT all grounding devices Failure to do so can result in severe personal injury death or electrical shock CAUTION Be careful when you work on the electric range handling the sheet metal part Sharp edge may be presen...

Page 30: ...u can access the back of the unit 4 Remove the rear motor cover and control assembly See the page 3 2 5 Raise the cooktop assembly See the page 3 4 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 WARNING DISCONNECT power supply cord from the outlet before servicing Replace all panels and parts before operating RECON...

Page 31: ... Failed terminals or wires not pressed into connectors far enough 3 Resistance checks must be made with power cord unplugged from outlet and with wiring harness or connectors disconnected Before testing any of components perform the following checks WARNING Disconnect power supply cord from the outlet before servicing Replace all panels and parts before operating Reconnect all grounding devices af...

Page 32: ...3 13 for the servicing procedure 2 Measure the resistance after cooling down Multiple meter scale R x 1000 Normal Approximately 1 09 kΩ 10 If not replace Components Test procedures Results Normal Infinite Normal Approximately 3 9 kΩ 10 If not replace Abnormal Infinite open below 5Ω shorted NOTE The Micro switch will be held for 13 seconds during lock or unlock ON position Unlock position OFF posit...

Page 33: ... after cooling down Multiple meter scale R x 1 Normal Below 5 Ω If not replace Bake heater 1 Remove wire leads 2 Measure resistance after cooling down Normal Approximately 23Ω Abnomal Infinite opened NOTE Ω Value was tested at room temperature 77F 25 C Be careful the element is sensitive to temperature Broil heater 1 Remove wire leads 2 Measure resistance after cooling down Normal Approximately 13...

Page 34: ...e ohmmeter test leads to the element terminal and 1A The meter should indicate 46 Ω 10 5 Touch the ohmmeter test leads to limiter terminals 1B and 2B With the temperature below 150 F the meter should indicate an open circuit infinite With the temperature above 150 F the meter should indicate continuity 0Ω Components Test procedures Results Normal Approximately 46 Ω If not replace Below 150 F open ...

Page 35: ...ires from cook top elements 4 Touch the ohmmeter test leads to the E1 1A and E2 1A the meter should indicate E1 1A 38 Ω 10 E2 1A 30 Ω 10 Normal Approximately 38 Ω Normal Approximately 30 Ω 5 Touch the ohmmeter test leads to limiter terminals 1B and 2B With the temperature below 150 F the meter should indicate an open circuit infinite With the temperature above 150 F the meter should indicate conti...

Page 36: ... from cook top elements 4 Touch the ohmmeter test leads to the E1 1A and E2 1A the meter should indicate E1 1A 28 5 Ω 10 E2 1A 50 0 Ω 10 Normal Approximately 28 5 Ω Normal Approximately 50 0 Ω 5 Touch the ohmmeter test leads to limiter terminals 1B and 2B With the temperature below 150 F the meter should indicate an open circuit infinite With the temperature above 150 F the meter should indicate c...

Page 37: ...proximately 571 Ω If not replace Element terminal Element terminal Element terminal Element terminal Element terminal Element terminal Element terminal Element terminal Element terminal Element terminal Element terminal Element terminal Element terminal Element terminal Element terminal Element terminal Element terminal Element terminal Element terminal Element terminal Element terminal Element te...

Page 41: ...ation Check the failure code as follow these steps 1 press the clear Button 2 press the BAKE and BROIL Button at the same time If the oven has some failure the oven will show the failure code like FIG 1 It shows the type of F code and times of failure alternately for each two seconds If the oven do not has any failure the Oven will show it like FIG 2 NOTE After checking for the F code press the CL...

Page 42: ...re is over 650 F continuously during 2 minutes on cooking except self cleaning EXCEPT PROOF and WARM Case 1 start temperature does not exceed 130 F and oven temperature is less equal than 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 In case of Door Lock Failure in operating Lock motor 1 Wiring 2 Oven...

Page 43: ... GREEN GY GRAY OR ORANGE VI VIOLET Symptom Oven lamp not operating Check the Lamp coil s resistance Normal approximately 20 40Ω Symptom Door lock fail F 10 Check relative part Symptom Sensor error or no heating F1 F2 F9 Check Sensor resistance approximately 1 06 kΩ at 65F 1 12 kΩ at 65F 2 1 1 3 4 Symptom Oven hot F6 Check All heater relays are open short Symptom no heating F9 Check related 2 4 ...

Page 44: ...right LG Electronics Inc All rights reserved Only training and service purposes CHECKING FLOW CHART BY FAILURE Symptom Check Point 1 Power Failure Dead 2 No Display 1 Check Electric Wiring 2 Check the Main PCB ...

Page 45: ...connection of Main PCB CN01 Nomal Yes No Yes Plug the unit Power Failed Dead No display Check the button beep Touch the Clear button Can hear the beep sound Go to 7 On the next Page No Reconnect If defective harness replace or fix 1 No Yes Check the connection of Power Cord Normal Reconnect If defective harness replace or fix 2 3 ...

Page 46: ... CHART BY FAILURE Check the AC input of Main PCB Main PCB 1pin 3pin of CN01 120V AC No Yes Replace the main PCB 4 No Yes Check the connection of L1 and N at Terminal block Normal Reconnect 5 No Yes Check the Thermostat Normal Short Abnormal Open Normal Replace the Thermostat Replace the main PCB 6 CN01 ...

Page 47: ... CHART BY FAILURE Check the connection States between CN21 of Main PCB and Display PCB Is it OK No Yes Replace the Main PCB 7 Reconnect If defective harness replace or fix If the same phenomenon occurs even though after fixed connection you should replace the Display PCB CN21 CN21 Display PCB Main PCB ...

Page 48: ... Inc All rights reserved Only training and service purposes CHECKING FLOW CHART BY FAILURE Symptom Check Point 1 No heating 2 F9 1 Check Electric Wiring 2 Check Heater s Resistance 3 Check the Sensor thermistor TAB01 06 CN10 CN10 ...

Page 49: ...ning and service purposes CHECKING FLOW CHART BY FAILURE Oven does NOT heat Is the Connector disconnected or loose 1 Electric wiring of Relay PCB All taps 2 Electric wiring of electric element Yes Reconnect If defective harness Replace or fix 1 Unplug the unit No ...

Page 50: ...ll rights reserved Only training and service purposes CHECKING FLOW CHART BY FAILURE Check the resistance of each heater Normal Measure the resistance after cooling down The resistance is shown below No Replace the failed igniter 2 Yes ...

Page 51: ...the same time again 4 3 click t3 Start Normal Themistor value at room temp is from 70 F to 90 F as the above figure CHECKING FLOW CHART BY FAILURE Go to No6 Yes No Yes 3 4 Range Of the resistance Plug the unit Is the value of thermistor normal Refer below Check with the test mode Heater Resistance Ω Approximately Broil 13 7 Bake 16 5 Type of F code Software version Times of the occurred failure 2 ...

Page 52: ... training and service purposes CHECKING FLOW CHART BY FAILURE Is the resistance of thermistor normal Check Pin 1 and 2 of CN10 in main PCB Normal approximately 0 6 1K ohm at 25 No Replace the failed Thermistor 5 Yes Unplug the unit CN10 6 Replace the Main PCB ...

Page 53: ... rights reserved Only training and service purposes CHECKING FLOW CHART BY FAILURE Symptom Check Point 1 Door Lock System Failure 2 F 10 1 Check the Electric wiring 2 Check the Motor s Resistance 3 Check the Relay PCB Door Lock Relay CN02 ...

Page 54: ...heck the terminal looseness of micro switch and door locking motor Normal END No Yes Door lock failed Disconnect the power Reconnect Check the oven door lock switch micro switch measure the resistance Normally open type NO COM Door latch open Door latch Locked Continuity Infinite NO OM NO Door lock system error F 10 error ...

Page 55: ... Door lock system error F 10 error Normal Yes Yes Yes END No Replace the micro switch Normal Normal END No Replace the door locking motor END No Reconnect Replace the main PCB Check the door locking motor measure the resistance normal approximately 2 6 kΩ abnormal infinite or below 5 Ω Check the looseness of CN02 NO COM ...

Page 56: ...cs Inc All rights reserved Only training and service purposes CHECKING FLOW CHART BY FAILURE Symptom Check Point 1 Sensing Fail 2 F1 3 F2 1 Check the Electric wiring 2 Check the sensor thermistor resistance CN10 CN10 Pin 1 and 2 ...

Page 57: ...and service purposes CHECKING FLOW CHART BY FAILURE Main oven sensing error F 1 F 2 error Is the Connector disconnected or loose 1 Sensor connection 2 CN10 of Main PCB Yes Reconnect or adjust the connection 1 No Unplug the unit CN10 Sensor connection Sensing Fail F1 F2 ...

Page 58: ... Only training and service purposes CHECKING FLOW CHART BY FAILURE No Replace the defective Thermistor 2 Yes Is the resistance of thermistor normal Check Pin 1 and 2 of CN10 of Main PCB Normal approximately 0 6 1K ohm at 25 2 1 3 Replace the Main PCB CN10 ...

Page 59: ...16 Copyright LG Electronics Inc All rights reserved Only training and service purposes CHECKING FLOW CHART BY FAILURE Symptom Check Point 1 Oven hot 2 F 6 1 Check the Resistance of the Relay TAB01 06 CN10 ...

Page 60: ...ctronics Inc All rights reserved Only training and service purposes CHECKING FLOW CHART BY FAILURE Normal Abnormal Check the DLB Relay damage measure the resistance Yes Replace the Main PCB 1 No Unplug the unit F6 Oven Hot ...

Page 61: ...erved Only training and service purposes CHECKING FLOW CHART BY FAILURE No Replace the Main PCB 2 Yes Is the resistance of thermistor normal Check Pin 1 and 2 of CN10 of Main PCB Normal approximately 0 6 1K ohm at 25 3 Replace the Thermistor CN10 2 1 ...

Page 62: ...9 19 Copyright LG Electronics Inc All rights reserved Only training and service purposes CHECKING FLOW CHART BY FAILURE Symptom Check Point 1 Key not working 2 F3 Check the Key working CN20 ...

Page 63: ...or Or button does not input CHECKING FLOW CHART BY FAILURE Check the beep sound Does the beep sound when the power is turned on again No Replace the Main PCB 1 Yes Unplug the unit Is the connector disconnected or loose Check CN20 Is it OK Yes No Reconnect or adjust the connection 4 CN20 CN20 Replace the Display PCB ...

Page 64: ...ontact with door switch Test and or replace PCB Refer to the page 9 1 9 3 Verify power is present at unit Verify that the circuit breaker is not tripped Replace household fuse capacity Check circuit breaker Repair or replace wiring see wiring diagrams Test and or replace element Test and or replace PCB Verify all connections are clean and tight replace broken wires Test and or replace main PCB Tes...

Page 65: ...or latch lever Oven is still hot Cool down period after self clean cycle not complete Improper use of oven e g being used to heat the home Worn or broken broil stop roller Replace main PCB Replace main PCB Verify power is present at unit Verify that the circuit breaker is not tripped Replace household fuse but do not fuse capacity Refer to Owner s manual instructions Verity all connections are cle...

Page 66: ...on fan Deformed convection fan Electronically controlled Oven sensor needs to be adjusted Adjust hinges or replace hinges Adjust or replace hinges Adjust hinges outward Do not cover racks with foil Install tempered glass toward the heat Do not use harsh abrasives or scouring pads See Owner s manual intructions Apply a small amount of vegetable oil to a paper towel and wipe the edges of the oven ra...

Page 67: ... Electronics Inc All rights reserved Only training and service purposes EXPLODED VIEW EV INTRODUCTION DOOR PARTS DRAWER PARTS COOKTOP PARTS CONTROLLER PARTS CAVITY PARTS MODEL Customer Model Product Code SVC Model ...

Page 68: ...LG Electronics Inc All rights reserved Only training and service purposes DOOR PARTS EV 1020 1009 1021 1733 1466 1704 W321 1704 1733 W101 W321 1735 102L 102S W101 W108 102S 102U 1000 W243 W225 W225 W222 1801 1028 ...

Page 69: ...Copyright LG Electronics Inc All rights reserved Only training and service purposes EV CONTROLLER PARTS 2381 2034 2084 2006 3075 2084 2087 2441 2052 H212 H211 2037 2028 2128 2036 H213 2050 2374 ...

Page 72: ...EV CAVITY PARTS 5501 W234 3501 5014 5539 5021 W301 W301 W230 W230 5506 5513 5951 W233 W232 5407 5700 5063 4002 W230 W225 W225 5516 5512 5512 5515 5032 5401 2048 5517 5452 5037 5509 5502 5016 3013 5510 5012 5503 W301 8511 W229 9381 5511 5532 5533 5514 3063 5508 5641 3031 5019 5556 5556 ...

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