LG LRG3093ST Service Manual
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LG LRG3093ST Service Manual

LG LRG3093ST Service Manual

30” freestanding gas range
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  • Page 1 This Owner's Manual is provided and hosted by Appliance Factory Parts. LG LRG3093SB Owner's Manual Shop genuine replacement parts for LG LRG3093SB Find Your LG Gas Range Parts - Select From 55 Models -------- Manual continues below --------...
  • Page 2 삼 흥 정 판 Internal Use Only Website http://us.lgservice.com 30” Freestanding Gas Range SERVICE MANUAL MODEL: LRG3093ST LRG3093SB LRG3093SW CAUTION BEFORE SERVICING THE UNIT, READ THE SAFETY PRECAUTIONS IN THIS MANUAL. December, 2009 P/NO : MFL63290102 Printed in Korea...
  • Page 3 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 4: Table Of Contents

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

  • Page 6: General

    GENERAL IMPOR ANT SAFETY INSTR UCTIONS IMPOR ANT SAFETY INSTR UCTIONS 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 7 GENERAL IMPOR ANT SAFETY INSTR UCTIONS IMPOR ANT SAFETY INSTR UCTIONS • Be sure your appliance is properly installed and grounded by WARNING 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.
  • Page 8 GENERAL IMPOR ANT SAFETY INSTR UCTIONS IMPOR ANT SAFETY INSTR UCTIONS SURFACE COOKING UNITS SELF-CLEAN OVENS • If the top burner flame goes out,gas is still flowing to the • Do Not Clean Door Gasket – The door gasket is essential burner until the knob is turned to the “OFF”...

  • Page 9: Model & Serial Number Label And Tech Sheet Locations

    GENERAL MODEL & SERIAL NUMBER LABEL MODEL & SERIAL NUMBER LABEL AND TECH SHEET LOCA TIONS AND TECH SHEET LOCA TIONS The Model/Serial Number label and Tech Sheet locations are shown below. Model & Serial Number Location Tech Sheet Location (On Low Rear Cover)
  • Page 10 GENERAL SPECIFICA TIONS SPECIFICA TIONS Model Number LRG3093ST LRG3093SB LRG3093SW Category Non Convection Overall Width 30" Installation type Freestanding Color availability Black White Control Oven Key Pad Cooktop Knob Display Electronic clock & timer Control lock capability Audible preheat signal Special function 1.

  • Page 11: Using Your Range

    USING YOUR RANGE GENERAL INFORMA TION GENERAL INFORMA TION Broil Mode Rating Label Broil burner operates during broil mode. Broil can Model numbers are recorded on the rating label. be used to cook foods which are normally broiled. Rating label is located on the lower front left corner Preheating is not required when using broil.

  • Page 12: Control Panel Features

    USING YOUR RANGE CONTR OL P ANEL FEA TURES CONTR OL P ANEL FEA TURES 1. BAKE PAD – Press the pad to enter the normal bake 9. START TIME PAD – Press this pad and then press function. the number pad to set delayed start time. The oven will start at a time you set.

  • Page 13: To Turn On On The Surface Burners

    USING YOUR RANGE 1. TO TURN ON THE SURFACE BURNER 4. TO TURN ON/OFF THE OVEN LIGHT 1. Be sure all the surface burners are placed in The oven light automatically turns ON when the their respective positions. door is opened. The oven light may also be 2.

  • Page 14: Bake, Timed Bake, Delayed Timed Bake

    USING YOUR RANGE 2) PREHEATING ALARM LIGHT ON/OFF 9. WARM 1. Press and hold the pad for 3 seconds. WARM START Then press the WARM pad once. 2. Press “1” pad to switch between ON and OFF 3. Press START pad 10.

  • Page 15: 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 LOCA TIONS COMPONENT LOCA TIONS Power PCB Relay PCB Main PCB Spark module Door locking motor &...
  • Page 16 COMPONENT ACCESS REMO VING THE B CK, CONTR OL CO REMO VING THE B CK, CONTR OL CO AND KEY P AD ASSEMBL AND KEY P AD ASSEMBL 7. Remove the 2 screws of the eyebrow from the WARNING controller sub assembly and remove the eyebrow. •...
  • Page 17 COMPONENT ACCESS REMO VING THE SP ARK MODULE (IG TRANS) REMO VING THE SP ARK MODULE (IG TRANS) AND PO WER CONTR OL BO ARD (PCB) AND PO WER CONTR OL BO ARD (PCB) 4. There are 3 PCB's (power control board). When WARNING you check PCB, check the proper pcb in default mode and check main pcb.
  • Page 18 COMPONENT ACCESS REMO VING THE COOKT OP PLA REMO VING THE COOKT OP PLA 5. Life top up at front. 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.

  • Page 19: Removing The Cooktop Plate

    COMPONENT ACCESS REMO VING THE CASE ASSEMBL REMO VING THE CASE ASSEMBL (COOKT OP B URNER ASSEMBL (COOKT OP B URNER ASSEMBL 4. Remove the tubing fitting (5/8-inch). WARNING 5. Remove 5 phillips head screws. • DISCONNECT power supply cord from the outlet before servicing.
  • Page 20 COMPONENT ACCESS REMO VING THE COOKT OP P REMO VING THE COOKT OP P 4. To remove the valve: WARNING a) Remove the manifold panel (See the step 3 on page 3-5). • DISCONNECT power supply cord b) Remove the fitting that you need to remove. from the outlet before servicing.
  • Page 21 COMPONENT ACCESS 5. To remove the ignition switch: a) Remove the manifold panel (See the step 3 on page 3-5). b) Pry on the 2 release tabs and slide the switch off the valve stem. c) Remove the connector and remove the ignition switch.
  • Page 22 COMPONENT ACCESS REMO VING THE DOOR LA TCH & DOOR SWITCH REMO VING THE DOOR LA TCH & DOOR SWITCH b) Remove the 2 screws and then remove the bar WARNING from the door latch. c) Remove the door latch. •...
  • Page 23 COMPONENT ACCESS REMO VING THE BR OIL B URNER ASSEMBL REMO VING THE BR OIL B URNER ASSEMBL d) Remove the igniter connecter in the cavity WARNING (To get the connecter, pull the wire toward the cavity). • DISCONNECT power supply cord e) Remove the broil burner assembly.
  • Page 24 COMPONENT ACCESS VEN BO OM, THE FRAME GUIDE VEN BO OM, THE FRAME GUIDE AND THE B URNER ASSEMBL AND THE B URNER ASSEMBL 1. Turn off the electrical supply and gas supply 6. To remove the nozzle case: going to the range. - Remove the screw and then remove nozzle 2.

  • Page 25: Removing The Oven Light & Socket Assembly

    COMPONENT ACCESS REMO VING THE O VEN LIGHT & SOCKET ASSEMBL REMO VING THE O VEN LIGHT & SOCKET ASSEMBL CAUTION WARNING • DISCONNECT power supply cord • Be careful not to scratch or chip the from the outlet before servicing. oven liner paint when you remove •...

  • Page 26: Door Locking Mechanism

    COMPONENT ACCESS REMO VING THE LA TCH DRIVE ASSEMBL REMO VING THE LA TCH DRIVE ASSEMBL DOOR LOCKING MECHANISM WARNING The door lock assembly is located at the back side • DISCONNECT power supply cord of range. from the outlet before servicing. The structural elements are as below.

  • Page 27: Removing The Oven Temperature Sensor

    COMPONENT ACCESS REMO VING THE O VEN TEMPERA TURE SENSORS REMO VING THE O VEN TEMPERA TURE SENSORS 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.
  • Page 28 COMPONENT ACCESS REMO VIING & REPLA CING THE W ARMIING DRA REMO VIING & REPLA CING THE W ARMIING DRA To Replace the Storage Drawer: WARNING 1. Place the drawer rails on the guides. • DISCONNECT power supply cord 2. Push the drawer back until it stops. from the outlet before servicing.
  • Page 29 COMPONENT ACCESS REMO VING & REPLA CING THE LIFT -OFF O VEN DOOR REMO VING & REPLA CING THE LIFT -OFF O VEN DOOR To replace the door: CAUTION 1. Firmly grasp • Be careful when removing and both sides of the lifting the door.
  • Page 30 COMPONENT ACCESS REMO VING THE O VEN DOOR HANDLE & GLASS REMO VING THE O VEN DOOR HANDLE & GLASS 6. To remove the door handle & trim WARNING a) Remove the 4 door handle screws and lift the door handle off door trim and slide up the door trim.
  • Page 31 COMPONENT ACCESS 8. To remove a hinge hanger assembly: d) Lift the inner oven door glass and bracket a) Remove the 2 top liner screws assembly out of the door liner. (See step 3 on page 3-14) b) Place the door liner assembly on a padded work surface with the hinge hangers over the edge.

  • Page 32: Removing The Oven Door Gasket

    COMPONENT ACCESS REMO VING THE O VEN DOOR GASKET REMO VING THE O VEN DOOR GASKET 3. Pull the ends of the gasket out of the liner holes. WARNING Liner Hole • DISCONNECT power supply cord from the outlet before servicing. •...
  • Page 33 COMPONENT ACCESS REMO VING A SIDE P ANEL REMO VING A SIDE P ANEL 7. Remove the 6 screws from the left or right side WARNING panel. • DISCONNECT power supply cord from the outlet before servicing. • Replace all panels and parts before operating.
  • Page 34 COMPONENT ACCESS REMO VE THE O VEN V VE (SAFETY V REMO VE THE O VEN V VE (SAFETY V & GAS REGULA & GAS REGULA c) Remove the 4 connectors. WARNING d) Remove the 4 screws and than lift the oven valve.

  • Page 35: Component Test

    COMPONENT TEST Before testing any of 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 36: Micro Switch (Normally Open Type)

    Components Test procedures Results Door latch Door latch Micro Switch 1. Refer to page 3-13 for the servicing procedure open Locked (normally open type) 2. Measure the resistance (Multiple meter scale: R x 1000) Continuity Infinite NOTE: After checking for the continuity of switch, make sure that they are connected correctly Oven Sensor 1.

  • Page 37: Oven Lamp

    Components Test procedures Results Normal: Approximately Oven lamp 1. Measure the resistance after cooling down 5 Ω ± 10% (Multiple meter scale: R x1) If not replace Normal: 45 Ω ~ 100 Ω Broil or bake igniter 1. Refer to page 3-9 or 3-10 for servicing procedure. (Room Temperature 2.

  • Page 38: Conversion To Lp Gas

    CONVERSION TO LP GAS 2. CONVERT THE PRESSURE REGULATOR WARNING WARNING • Turn off the electrical supply and gas supply going to the range. • Do not remove the pressure • Replace all panels and parts before regulator from the range. operating.
  • Page 39 CONVERSION TO LP GAS 1) Remove grates, burner caps and burner WARNING heads. 2) Remove the brass orifice spud in the chimney • Turn off the electrical supply and of each burner using a 13/32” or 10 mm nut gas supply going to the range. driver.
  • Page 40 CONVERSION TO LP GAS Orifice Locations for Natural Gas [LRG3095S] WARNING • Turn off the electrical supply and gas supply going to the range. • 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.
  • Page 41 CONVERSION TO LP GAS 2) Release the connector of the lgniter. WARNING 3) Remove the orifice spud from nozzle holder using a 13/32” or 10mm wrench. • Turn off the electrical supply and 4) Install the LP orifce spud(C) to the nozzle gas supply going to the range.
  • Page 42 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. 5) Replace the knob.

  • Page 43: Composition Of Control

    COMPOSITION OF CONTROL Main PCB (P/N : EBR52349504) Power PCB (P/N : EBR57124701) Front Back Controller assembly Relay PCB (P/N : EBR52349703)
  • Page 44 COMPOSITION OF CONTROL Main PCB Main PCB P/N : EBR52349504 wer PCB wer PCB P/N : EBR57124701 CN10 CN10 CN10 CN10 CN10 CN10 CN10 CN10 CN10 CN10 CN10 CN10 CN10 CN10 CN10 CN10 CN10 CN10 CN10 CN10 CN10 CN10 Rela y PCB Rela y PCB...

  • Page 45: Diagnosis Through Schematic

    DIAGNOSIS THROUGH SCHEMATIC Symptom : Oven hot(F-6) -. Check: All heater relays are open/short Symptom : Sensor error or no heating (F-1, F-2, F-11) -. Check : Sensor resistance Symptom : no heating(F-11) -. Check : relative part Symptom : Door lock fail (F-10) -.

  • Page 46: Check The Failure Code (F-Code)

    CHECK THE FAILURE CODE (F-code) ■ When the oven has some failure on cooking, - Cancel the cook. - In case of failure, F-code will not display during normal operation. - It memorizes F-code logs in EEPROM. ■ Check the failure code as follow these steps. 1.

  • Page 47: Failure Code Summary

    FAILURE CODE SUMMARY Code Description How to detect Check point Opened Sensor Oven sensor remains open over 1 min 1. Wiring during cooking. 2. Oven Sensor Shorted Sensor Oven sensor is short over 1 min during 1. Wiring cooking. 2. Oven Sensor Key shorted When some key is continuously short 1.

  • Page 48: Checking Flow Chart By Failure

    CHECKING FLOW CHART BY FAILURE Symptom Check Point 1. Power Failure 1. Check Electric Wiring (Dead) 2. Check the Power PCB and Main PCB Voltage 2. No Display 10-1...

  • Page 49: Power Failed(Dead), No Display

    CHECKING FLOW CHART BY FAILURE Power Off Power Failed(Dead), No display? Replace the defective Is the electric wiring normal? harness Measure the resistance Power On State Power cord and CN01’s connection Go to No 4 Check the key beep. Normal : continuity Touch the “clear key”, Abnormal : infinite Is the beep sound?
  • Page 50 CHECKING FLOW CHART BY FAILURE Power On Power On Replace the Replace the Check the voltage of Is the voltage of Main Power PCB Main PCB Power PCB PCB’s Vcc 4.5V ~ 5.5V? Is the voltage as below? Check the voltage between pin2 and pin3 of IC2 PIN No.
  • Page 51 CHECKING FLOW CHART BY FAILURE Symptom Check Point 1. No heating 1. Check Gas Supply 2. F11 2. Check Electric Wiring 3. Check Heater’s Resistance. 4. Check the Sensor. 10-4...

  • Page 52: Oven Does Not Heat, F-11

    CHECKING FLOW CHART BY FAILURE Power Off Oven does not heat, F-11 Replace the Is the glowbar igniter failed glowbar normal? Power Off Measure the resistance of each glowbar Reconnect or (The resistance is shown on next page) repair the Is the disconnect or loose connector connector?
  • Page 53 CHECKING FLOW CHART BY FAILURE Power Off Range Of the resistance Heater Min[Ω] Max [Ω] Replace the Is the resistance of Broil Glowbar 45.0 400.0 failed thermistor thermistor normal? Bake Glowbar 45.0 400.0 Gas Valve(Broil) Check: Gas Valve(Bake) Pins 1and 2 of CN5 wiring in main PCB Normal - approximately 1.09kΩ...

  • Page 54: Door Lock System Failure, F-10

    CHECKING FLOW CHART BY FAILURE Symptom Check Point 1. Door Lock System 1. Check the Electric wiring Failure 2. Check the Motor’s Resistance 2. F-10 3. Check the Relay PCB(Lock Motor Relay) 10-7...
  • Page 55 CHECKING FLOW CHART BY FAILURE Power Off Door Lock System Failure,F-10? Replace the Is the door lock switch micro switch (micro switch) normal? Note : measure the resistance of Just after self-clean start, the door lock motor starts to door lock switch normally open type rotate.

  • Page 56: Sensing Fail, F-1, F-2

    CHECKING FLOW CHART BY FAILURE Symptom Check Point 1. Sensing Fail 1. Check the Electric Wiring 2. F-1 2. Check the Test Mode 3. F-2 3. Check the Sensor’s Resistance 10-9...
  • Page 57 CHECKING FLOW CHART BY FAILURE Sensing Fail, F-1, F-2? Power Off Reconnect or repair the Is the disconnect or loose connector connector? 1. Sensor connection 2. CN05 of Main PCB Power On Go to No 1 Is the value of thermistor normal? Check: using the test mode Sensor...

  • Page 58: Oven Too Hot, F-6, F-16

    CHECKING FLOW CHART BY FAILURE Symptom Check Point 1. Oven hot 1. Check the Resistance of the Relay. 2. F-6 10-11...
  • Page 59 CHECKING FLOW CHART BY FAILURE Oven too hot, F-6, F-16? 2pin(CN10) Power Off Bakel(RY6) Relay Replace the Resistance L:TAB1 L:TAB1 L:TAB1 Is the resistance of L:TAB1 L:TAB1 L:TAB1 L:TAB1 L:TAB1 L:TAB1 L:TAB1 L:TAB1 L:TAB1 L:TAB1 L:TAB1 L:TAB1 L:TAB1 L:TAB1 L:TAB1 failed thermistor thermistor normal? Check:...
  • Page 60 CHECKING FLOW CHART BY FAILURE Power On Replace Is the Relay operation signal the Main PCB Nomal? (EBR52349504) In Idle Mode (press the clear), Check the voltage of Diode 1. Both D40 ends. 2. Both D41 ends 2. Both D41 ends Normal: - approximately 0 V Abnormal:...
  • Page 61 CHECKING FLOW CHART BY FAILURE Symptom Check Point 1. Keypad Failure 1. Check the Door Locking System. 2. F-3 Error 2. Check the Electric Wiring. 10-14...

  • Page 62: Error (Touch-Sensor Key Error) Or Key Does Not Input

    CHECKING FLOW CHART BY FAILURE F-3 error (Touch-sensor key error) Or Key does not input Power Off Reconnect or repair Is the disconnect or the connector loose connector? CN2 of Main PCB Power On Replace or Remove keypad-tail and repair the wire check F-3 error recur or not, after one minute Does the F-3 error recur ?

  • Page 63: Trouble Shooting

    TROUBLE SHOOTING BEFORE CALLING FOR SER VICE BEFORE CALLING FOR SER VICE Before you call for service, review this list.It may save you time and expense. The list includes common occurrences that are not the result of defective workmanship or materials in this appliance. PROBLEMS POSSIBLE CAUSES SOLUTIONS...
  • Page 64 TROUBLE SHOOTING PROBLEMS POSSIBLE CAUSES SOLUTIONS Food does not bake or roast • Improper oven controls setting. • See the “USING THE OVEN” section in properly user’s guide. • Incorrect rack position. • See the “USING THE OVEN” section in user’s guide.
  • Page 65 TROUBLE SHOOTING PROBLEMS POSSIBLE CAUSES SOLUTIONS Oven will not selfclean • The oven temperature is too high • Allow the range to cool to room to set a self-clean operation. temperature and reset the controls. • Improper oven controls setting. •...
  • Page 66 TROUBLE SHOOTING PROBLEMS POSSIBLE CAUSES SOLUTIONS Oven racks are difficult to • The oven racks were cleaned in a • Apply a small amount of vegetable oil to a slide self-clean cycle. paper towel and wipe the edges of the oven racks with the paper towel.
  • Page 67 #EV# INTRODUCTION (II) For Model: CONTROLLER PARTS COOKTOP PARTS DOOR PARTS CAVITY PARTS DRAWER PARTS -12-2-...
  • Page 68 #EV# DOOR PARTS (II) For Model: 1402 W243 1000 W149 1733 1020 1703 1018 W222 W144 W144 W108 1704 W144 1028 W108 W108 1403 1410 1015 W144 1703 W109 1733 W108 1401 W109 W144 1009 1410 1704 1382 -12-4-...
  • Page 69 #EV# CONTROLLER PARTS 2048 2075 W144 W215 2015 2030 W130 2402 W144 3006 W144 2006 2009 3006 W144 2058 2041 2501 W215 2037 2128 W144 W144 2028 2036 2033 W144 -12-5-...
  • Page 70 #EV# COOKTOP PARTS 3945 3946 3945 3975 3970 W177 3976 3977 3971 3973 3979 W294 3978 3974 3972 W294 3056 3401 W295 W144 W172 3986 W144 3990 3402 3991 3925 3940 3992 3960 3993 W144 3994 3961 3962 3995 W294 3982 W144 3963...
  • Page 71 #EV# DRAWER PARTS 8388 8530 W215 W144 8527 W215 W144 W149 8514 8526 W215 8501 W215 8507 8527 8530 8526 W144 W144 For Model W149 W144 8540 For Model W215 8541 W144 3106 W144 3106 8550 W144 W172 W144 8515 5505 9384 8524...
  • Page 72 #EV# CAVITY PARTS (II) For Model: W144 3013 W144 5501 W144 5063 5149 5150 5510 5941 3006 W116 5700 5900 W144 5951 5010 W108 5901 W144 W231 5460 5942 5517 5902 5921 W106 5461 W144 W108 W144 3006 5912 W109 W144 W231 5502...

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