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LG LRG4111ST Service Manual

Freestanding gas single oven range
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Internal Use Only
30" Freestanding Gas Single Oven Range
SERVICE MANUAL
MODEL: LRG4111ST
CAUTION
BEFORE SERVICING THE UNIT, READ THE SAFETY PRECAUTIONS IN THIS MANUAL.
July, 2016
P/NO : MFL37118357
Printed in Korea
1

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Summary of Contents for LG LRG4111ST

  • Page 1 Internal Use Only 30” Freestanding Gas Single Oven Range SERVICE MANUAL MODEL: LRG4111ST CAUTION BEFORE SERVICING THE UNIT, READ THE SAFETY PRECAUTIONS IN THIS MANUAL. July, 2016 P/NO : MFL37118357 Printed in Korea...
  • 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/CSA listed range cord.

  • Page 3: Table Of Contents

    TABLE OF CONTENTS GENERAL - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 1-1 ~ 1-5 •...
  • Page 4 (Page) COMPONENT TEST - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 4-1 ~ 4-3 •...

  • Page 5: General

    GENERAL IMPORTANT SAFETY INSTRUCTIONS Read and follow all instructions before using your oven to prevent the risk of fire, electric shock, injury to person, or damage when using the range. This guide don’t cover all possible conditions that may occur. For further assistance contact your service agent or manufacturer.
  • Page 6 GENERAL IMPORTANT SAFETY INSTRUCTIONS • Be sure your appliance is properly installed and grounded WARNING by a qualified technician. • Do not repair or replace any part of the appliance unless • DO NOT store items of interest to specifically recommended in the manual. children in cabinets above a range or All other servicing should be referred to a qualified technician.
  • Page 7 GENERAL IMPORTANT SAFETY INSTRUCTIONS SURFACE COOKING UNITS VENTILATING HOODS: • If the top burner flame goes out,gas is still flowing to the • Clean Ventilating Hoods Frequently – Grease should burner until the knob is turned to the “OFF” position.Do not not be allowed to accumulate on hood or filter.

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

    GENERAL MODEL & SERIAL NUMBER LABEL AND TECH SHEET LOCATIONS The Model/Serial Number label and Tech Sheet locations are shown below. * Nameplate is located on Left corner of drawer front plate Model & Serial Number Location Tech Sheet Location (On Upper Rear Cover)

  • Page 9: Specifications

    GENERAL SPECIFICATIONS Model Number LRG4111ST Category Convection Overall Width 30" Installation type Freestanding Color availability Control Oven Glass Touch Cooktop Knob Display Electronic clock & timer Control lock capability Audible preheat signal Special function Setting (6 categories) 1. Change hour mode on Clock 2.

  • Page 10: Using Your Range

    USING YOUR RANGE GENERAL INFORMATION Convection Bake / Roast Mode Rating Label Convection bake should be used for cooking Model numbers are recorded on the rating label. casseroles and roasting meats. Oven should be Rating label is located on the left corner of drawer preheated for best results when using convection front plate.

  • Page 11: Control Panel Features

    USING YOUR RANGE CONTROL PANEL FEATURES Model: LRG4111 oven 8. LIGHT: Use to turn the Oven lights of the oven on and off. 1. CONV.BAKE: Use to select the Conv. Bake function of 9. CLOCK: Use to set the time of day. the lower oven.

  • Page 12: To Turn On On The Surface Burners

    USING YOUR RANGE 1. TO TURN ON THE SURFACE BURNERS To cancel timer at any time, touch TIMER ON/OFF. NOTE: 1. Be sure all the surface burners are placed in 1. If you touch TIMER ON/OFF once, this allows you to their respective positions.

  • Page 13: Timed Cook, Delayed Timed Cook(For Bake, Conv. Bake & Roast)

    USING YOUR RANGE 11. WARM 5) Adjusting the Beeper Volume 1. Touch Settings repeatedly until Beep WARM appears in the display. 2. Touch 1 to select Hi, Lo or Off. START WARM/PROOF 3. Touch Start to accept the change. Once → WARM 6) Selecting Fahrenheit or Celsius 1.

  • Page 14: Component Access

    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 NFC PCB Oven Sensor Burner body Buzzer PCB Burner pipe Cooktop valve Oven light Igniter (broil) Door switch Spark module...
  • Page 15 COMPONENT ACCESS REMOVING THE BACK, CONTROL COVER AND GLASS TOUCH ASSEMBLY WARNING 5. Separate PCB assembly after unpluging the connectors. • 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 electric shock.
  • Page 16 COMPONENT ACCESS REMOVING THE SPARK MODULE (IG TRANS) AND POWER CONTROL BOARD (PCB) 5. 5 connectors of the electrode and a WARNING connector of the harness. • DISCONNECT power supply cord a) Disconnect 6 connectors. from the outlet before servicing. •...
  • Page 17 COMPONENT ACCESS SERVICE INSTRUCTIONS (SIGNAL WIRE) WARNING ① ② ③ • 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 electric shock.
  • Page 18 COMPONENT ACCESS REMOVING THE COOKTOP PLATE 6. Remove all 11 screws from cooktop burner WARNING housing. • 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 electric shock.
  • Page 19 COMPONENT ACCESS REMOVING THE COOKTOP PARTS 4. To remove the valve: WARNING a) Remove the fitting that you need to remove. • DISCONNECT power supply cord b) Remove the ignition switch with rubber from the outlet before servicing. packing by prying on the 2 release tabs and slide the switch off the valve stem.
  • Page 20 COMPONENT ACCESS 5. To remove the ignition switch: a) Remove the manifold panel (See the page 3-5). b) Remove the 2 housings and slide the switch off the valve stem. c) Remove the connector and remove the ignition switch. To remove the electrode (spark plug): a) Remove the connector from the spark module.
  • Page 21 COMPONENT ACCESS REMOVING THE DOOR SWITCH 5. To remove the door switch: WARNING a) Remove the door switch from the range. • DISCONNECT power supply cord To do this, squeeze tabs and use a ratchet extension or a small socket, and tap it out of from the outlet before servicing.
  • Page 22 COMPONENT ACCESS REMOVING THE BROIL BURNER ASSEMBLY c) Remove the igniter connector in the cavity WARNING (To get the connector, remove 1 screw of wire supporter and pull the wire toward the cavity.). • DISCONNECT power supply cord from the outlet before servicing. •...
  • Page 23 COMPONENT ACCESS REMOVING THE CONVECTION FAN BLADE AND FAN MOTOR 1. Turn off the electrical supply and gas supply 5. To remove the fan blade : going to the range and remove the oven racks. - Remove the nut by 2.
  • Page 24 COMPONENT ACCESS REMOVING THE OVEN LIGHT & SOCKET ASSEMBLY CAUTION WARNING • Be careful not to scratch or chip the • DISCONNECT power supply cord oven liner paint when you remove from the outlet before servicing. the oven light socket in the next •...

  • Page 25: Oven Sensor

    COMPONENT ACCESS REMOVING THE OVEN TEMPERATURE 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 electric shock.
  • Page 26 COMPONENT ACCESS REMOVIING & REPLACING THE DRAWER Pull the drawer Replacing the Drawer CAUTION Pull the bearing glides to the front of the chassis glide. Pull the drawer • Disconnect the electrical power to Align the glide on each side of the drawer with the the range at the main fuse or circuit glide slots on the range.
  • Page 27 COMPONENT ACCESS REMOVING & REPLACING THE LIFT-OFF OVEN DOOR To replace the door: CAUTION 1. Firmly grasp • Be careful when removing and both sides of lifting the door. the door at the top. • DO NOT lift the door by the handle. - Doing so can result in personal injury as the Hinge arm door is very heavy.
  • Page 28 COMPONENT ACCESS REMOVING THE OVEN DOOR HANDLE & GLASS 6. To remove the door handle & air guide WARNING a) Remove 2 screws from air guide and then remove the air guide by lifting that. • DISCONNECT power supply cord from the outlet before servicing.
  • Page 29 COMPONENT ACCESS 7. To remove a hinge hanger assembly: Lift the inner oven door glasses and bracket a) Follow the step 3~4 on page 3-16. assembly out of the door inner assembly. b) Place the frame assembly on a padded work surface.
  • Page 30 COMPONENT ACCESS REMOVING THE OVEN DOOR GASKET c) Pull the ends of the gasket out of the liner WARNING holes. • DISCONNECT power supply cord Liner Hole from the outlet before servicing. • Replace all panels and parts before operating. •...
  • Page 31 COMPONENT ACCESS REMOVING A SIDE PANEL 7. Remove the screw from the left and right each WARNING side panel. • 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 electric shock.
  • Page 32 COMPONENT ACCESS REMOVE THE OVEN VALVE (SAFETY VALVE) & GAS PRESSURE REGULATOR 5. To remove the gas regulator: WARNING a) Remove the 2 fittings and a gas supplier • DISCONNECT power supply cord fitting. from the outlet before servicing. b) Remove the 2 screws. •...
  • Page 33 COMPONENT TEST Before testing any components, perform the following checks: NOTE: 1. The most common cause for control failure is corrosion on connectors. Therefore, disconnecting and reconnecting wires will be necessary throughout test procedures 2. ALL units in the first few days of use should be checked for mis-wiring or loose connections 1.

  • Page 34: Door Switch

    Components Test procedures Results Oven Sensor 1. Refer to page 3-18 for the servicing procedure Normal: Approximately 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) NOTE: Oven sensor is so sensitive to temperature...

  • Page 35: Oven (Safety) Valve

    Components Test procedures Results Igniter Type-2 1. Remove wire leads Normal: 50 Ω ~ 800 Ω (Room Temperature 2. Measure resistance. Resistance) Replace if: Infinite(opened) Oven (safety) valve 1. Refer to page 3-28 for servicing procedure. Normal: Approximately 1 ~ 3 Ω 2.

  • Page 36: Conversion To Lp Gas

    CONVERSION TO LP GAS 2. CONVERT THE GAS PRESSURE REGULATOR WARNING • Turn off the electrical supply and WARNING gas supply going to the range. • Replace all panels and parts before • Do not remove the gas pressure operating. regulator from the range.
  • Page 37 CONVERSION TO LP GAS 1) Remove grates, burner caps and burner WARNING heads. • Turn off the electrical supply and 2) Remove the brass orifice spud in the chimney of each burner using a 13/32” or 10 mm nut gas supply going to the range. driver.
  • Page 38 CONVERSION TO LP GAS 4) To prevent leakage, make sure the orifice WARNING spuds are securely screwed into the gas supply tubes. • Turn off the electrical supply and 5) For the right front burner of LRG4113ST, the gas supply going to the range. choke and self threading screw will be •...
  • Page 39 CONVERSION TO LP GAS 3) Remove the orifice spud from nozzle holder 5. CONVERT THE OVEN BURNER ORIFICES using a 13/32” or 10mm wrench. 4) Install the LP orifce spud(F) to the nozzle BAKE BURNER holder. To prevent leakage, make sure the orifice spud is securely screwed into the I.
  • Page 40 CONVERSION TO LP GAS 4) Insert a small, flat bladed screwdriver into the WARNING valve shaft as shown in Fig. 1. Turn the adjustment screw until the flame • Turn off the electrical supply and reaches the desired size. gas supply going to the range. •...

  • Page 41: Composition Of Control

    Composition of Control 1. Wiring Diagram...

  • Page 42: Composition Of Control

    COMPOSITION OF CONTROL 2. Composition of control Main PCB ( P/N : EBR80595313) Front Back Touch PCB ( P/N : EBR80089901) Controller assembly NFC PCB ( P/N : EBR78789101) Buzzer PCB ( P/N : EBR76332902)

  • Page 43: Main Pcb

    COMPOSITION OF CONTROL Main PCB ( P/N : EBR80595313) CN50 CN20 CN62 CN62 CN22 CN53 CN60 CN01 Touch PCB ( P/N : EBR80089901)

  • Page 44: Nfc Pcb

    COMPOSITION OF CONTROL NFC PCB ( P/N : EBR78789101) Buzzer PCB ( P/N : EBR76332902)

  • Page 45: Svc Test Mode

    SVC TEST MODE SEQUENCE OF SVC TEST MODE 1 Sequence of SVC Test Mode To enter the test mode, follow these steps: (1) press the Clear button (2) press the BAKE and BROIL buttons at the same time (3) press the BAKE and BROIL buttons at the same time again. Model Option Software version (4) press the NUM 0 button...
  • Page 46 SVC TEST MODE • Active Load Icon •SW Version Current inspecting Relay’s information is displayed (6) Whenever you input the START button, the relay operation sequence should be as seen below. ※ Relay Operation Sequence RY 53 RY 52 RY 62 RY 61 RY 60 Broil...

  • Page 47: Basic Check Summary

    SVC TeST Mode 2 Basic Check Summary Symptom : no heating(F9) Symptom : Oven hot(F6) -. Check: All heater relays are -. Check : All heater relays and open/shorted DLB relay are open Symptom : Sensor error or no heating (F1,F2) - Check : Sensor resistance Symptom : Conv.

  • Page 48: Troubleshooting

    TROUBLESHOOTING 1. Check the Failure Code · W hen the oven has a malfunction while cooking, Cooking will be canceled and log data of F-code will be recorded in EEPROM. F-code will not display during normal operation. · Check the failure code following these steps. (1) Press the CLEAR button (2) Press the BAKE and BROIL buttons at the same time.

  • Page 49: Failure Code Summary

    TROUBLESHOOTING 2. Failure Code Summary Code Description explanation Check point Sensor open Oven Thermistor is open 1.Wiring 2.Oven Sensor Sensor short Oven Thermistor is shorted. 1.Wiring 2.Oven Sensor Key short 1. If ‘25 key short’ occurred 3 times in 90 seconds. 1.Wiring 2.

  • Page 50: Troubleshooting

    TROUBLESHOOTING 3. Troubleshooting Symptom Check Point 1. Power Failure 1.Check Electrical Wiring (Dead) 2.Check the Main PCB Input Voltage with CN01 2. No Display CN01...
  • Page 51 TROUBLESHOOTING Power Failed (Dead), No display? Plug the unit Check the button beep. Check the AC input of Main Replace the Touch the Clear button, Replace the PCB. Main PCB Can hear the beep Main PCB - Main PCB CN01(Pin 1 and 3) sound? 120V AC? Reconnect.
  • Page 52 TROUBLESHOOTING Symptom Check Point 1. No heating 1.Check Electrical Wiring 2. F9 2.Check igniter’s Resistance. 3.Check the Sensor. Broil Broil Safety valve Igniter Conv. Bake Conv. Bake Safety valve Igniter...
  • Page 53 TROUBLESHOOTING Symptom Check Point 1. No heating 1.Check Electrical Wiring 2. F9 2.Check Igniter’s Resistance. 3.Check the Sensor. CN60...
  • Page 54 TROUBLESHOOTING Oven does NOT heat, F9 ICheck the resistance Replace the Unplug the unit of each igniter. Normal? failed igniter (Measure the resistance after cooling down. Reconnect. If The resistance is shown below) defective Is the Connector disconnected harness, or loose? (1) Electric wiring of Main Replace or fix PCB All taps.
  • Page 55 TROUBLESHOOTING Unplug the unit Range Of the resistance Replace the Is the resistance of defected igniter Resistance[ Ω thermistor normal? Themistor Approximately Check: Norton Igniter 45~400 SIC Igniter 50~500 Pins 4 and 5 of CN60 in main PCB Normal- approximately 1.09kΩ at 25˚C Plug in the unit Is the value of thermistor CN60...
  • Page 56 TROUBLESHOOTING Symptom Check Point 1. Sensing Fail 1.Check the Electrical Wiring 2. F1 2.Check the Test Mode 3. F2 3.Check the Sensor’s Resistance CN60...
  • Page 57 TROUBLESHOOTING Sensing Fail, F1, F2? Replace the Is the resistance of defective Unplug the unit thermistor normal? Thermistor Check: Reconnect Is the Connector or adjust the Pins 4 and 5 of CN60 in main PCB disconnected or loose? connection Normal- approximately 1.09kΩ at 25˚C (1) Sensor connection (2) CN60 of Main PCB CN60...
  • Page 58 TROUBLESHOOTING Plug in the unit Is the value of thermistor Go to No 1 normal? (Refer below) Check with the test mode To enter the test mode, follow these steps: (1) press the CLEAR button (2) press the BAKE and BROIL buttons at the same time.
  • Page 59 TROUBLESHOOTING Symptom Check Point 1. Oven hot 1.Check the Resistance of the Relay. 2. F6 2.Check the Sensor’s Resistance Broil Broil Safety valve Igniter Conv. Bake Conv. Bake Safety valve Igniter 8-12...
  • Page 60 TROUBLESHOOTING Symptom Check Point 1. Oven hot 1.Check the Resistance of the Relay. 2. F6 2.Check the Sensor’s Resistance CN60 8-13...
  • Page 61 TROUBLE SHOOTING Oven hot, F6? Is the igniter relay normal? Replace the Unplug the unit Main PCB Measure the resistance of igniter relay and Live. Replace the Normal: infinite Is the resistance of defective Abnormal : shorted thermistor normal? Thermistor Check: Broil Pins 4 and 5 of CN60 in main PCB...
  • Page 62 TROUBLE SHOOTING Plug in the unit Is the DLB relay normal? Replace the Is the value of thermistor Replace the Measure the resistance normal? (Refer below) Main PCB Main PCB Check with the test mode Normal: infinite To enter the test mode, Abnormal : shorted follow these steps: (1) press the CLEAR button...
  • Page 63 TROUBLE SHOOTING Symptom Check Point 1. Convection Fan not 1.Check the Resistance of the Relay. working 2.Check the Motor’s Resistance 2. F7 CN62 8-16...
  • Page 64 TROUBLE SHOOTING Convection fan not work, F7? Is the fan motor relay normal? Replace the Unplug the unit Main PCB Measure the resistance of fan motor relay and Live Normal: infinite Check the resistance of Replace the Abnormal : shorted each fan motor.
  • Page 65 TROUBLE SHOOTING Replace the Main PCB Is the Connector disconnected or loose? (Check all connectors and harnesses that are associated with the convection fan.) Reconnect. If defective harness, replace or fix. If the same phenomenon occurs even though after fixed connection, you should replace the Main PCB 8-18...
  • Page 66 TROUBLE SHOOTING Symptom Check Point 1. Key not working 1. Check the Electrical Wiring. 2. F3 Error 8-19...
  • Page 67 TROUBLE SHOOTING Plug in the unit F3 error (Button short error) Or button does not input Replace the Control panel. (With Glass Touch PCB) Unplug the unit And then check button operation using key test mode Reconnect Check the connecting states or adjust the To enter the test mode, follow these steps: between Touch PCB and...

  • Page 68: Exploded View

    #EV# EXPLODED VIEW INTRODUCTION MODEL: Customer Model Product Code SVC Model CONTROLLER PARTS COOKTOP PARTS DOOR PARTS 8511 9504 9506 DRAWER PARTS W229 CAVITY PARTS...
  • Page 69 #EV# DOOR PARTS 102S 102U W243 1000 102L 173U W222 1008 1704 1020 1015 1035 1021 W101 1009 1455 173U W101 1735 1704 1035...
  • Page 70 #EV# CONTROLLER PARTS 3106 2042 2043 2051 2044 2385 2050 2001 2006 2381 260K 260M 260B 203L 2034 203R 2501...
  • Page 71 #EV# COOKTOP PARTS 3946 3945 3945 2441 W293 2441 W293 3976 2441 2441 G058 W293 3976 3977 G058 3973 3979 W294 W293 3978 3974 W293 3972 W294 3056 W294 W291 3402 3925 2041 3099 303L W291 303R 555C 3990 5201 W323 3940 3992...
  • Page 72 #EV# DRAWER PARTS 8517 8512 8524 5505 8504 8602 8513 5505 W228 8507 W228 8514 8513 8501 8501 6008 8508 6008 851D 8508 8508 851D 8508...
  • Page 73 #EV# CAVITY PARTS W102 3057 3013 5510 3063 5010 3990 5332 5517 3006 5504 5032 5509 5903 2058 3501 5039 546L 3954 5408 5511 5405 593N 5504 546R 591L W129 5905 5535 8550 4002 W115 5955 5904 590U 5462 5512 5944 3057 594U...

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