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삼 흥 정 판 Internal Use Only 30” Freestanding Gas Single Oven Range SERVICE MANUAL MODEL: LRG4115ST CAUTION BEFORE SERVICING THE UNIT, READ THE SAFETY PRECAUTIONS IN THIS MANUAL. June, 2015 P/NO : MFL37118330 Printed in Korea...
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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.
GENERAL IMPOR ANT SAFETY INSTRUCTIONS IMPOR ANT 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.
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GENERAL IMPOR ANT SAFETY INSTRUCTIONS IMPOR ANT 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.
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GENERAL IMPOR ANT SAFETY INSTRUCTIONS IMPOR ANT SAFETY INSTRUCTIONS 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” position.Do not for a good seal.
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. * Nameplate is located on Left corner of drawer front plate Model &...
GENERAL SPECIFICA TIONS SPECIFICA TIONS Model Number LRG4115ST 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.
USING YOUR RANGE GENERAL INFORMA TION GENERAL INFORMA TION Rating Label Convection Bake / Roast Mode 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.
CONTROL P ANEL FEA TURES CONTROL P ANEL FEA TURES Model: LRG4115ST oven 9. LIGHT: Use to turn the Oven lights of the oven on and off. 1. CONV.BAKE: Use to select the Conv. Bake function of the lower oven.
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.
USING YOUR RANGE 5) Adjusting the Beeper Volume 11. WARM 1. Touch Settings repeatedly until Beep WARM appears in the display. START 2. Touch 1 to select Hi, Lo or Off. WARM/PROOF 3. Touch Start to accept the change. Once → WARM 6) Selecting Fahrenheit or Celsius 1.
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 Main PCB NFC PCB Door locking motor & micro switch Oven Sensor Burner body Buzzer PCB Burner pipe...
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COMPONENT ACCESS REMOVING THE BACK, CONTROL COVER AND GLASS T OUCH REMOVING THE BACK, CONTROL COVER AND GLASS T OUCH ASSEMBL ASSEMBL 5. Separate PCB assembly after unpluging the WARNING connectors. • DISCONNECT power supply cord from the outlet before servicing. •...
COMPONENT ACCESS REMOVING THE SP ARK MODULE (IG TRANS) REMOVING THE SP ARK MODULE (IG TRANS) AND POWER CONTROL BOARD (PCB) AND POWER CONTROL BOARD (PCB) 5. 5 connectors of the electrode and a WARNING connector of the harness. a) Disconnect 6 connectors. •...
COMPONENT ACCESS SERVICE INSTRUCTIONS (SIGNAL WIRE) SERVICE INSTRUCTIONS (SIGNAL WIRE) 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.
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COMPONENT ACCESS REMOVING THE COOKT OP PLA REMOVING THE COOKT OP PLA 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. •...
COMPONENT ACCESS REMOVING THE COOKT OP P REMOVING THE COOKT OP P 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 packing by prying on the 2 release tabs and from the outlet before servicing.
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COMPONENT ACCESS 5. To remove the ignition switch: a) Remove the manifold panel (See the page 3- b) Remove the 2 housings and slide the switch off the valve stem. c) Remove the connector and remove the ignition switch. 6. To remove the electrode (spark plug): a) Remove the connector from the spark module.
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COMPONENT ACCESS REMOVING THE DOOR LA TCH & DOOR SWITCH REMOVING THE DOOR LA TCH & DOOR SWITCH 5. To remove the door latch: WARNING a) Remove the two screws from the door latch and remove the latch. • DISCONNECT power supply cord b) Remove the door latch.
COMPONENT ACCESS REMOVING THE BROIL BURNER ASSEMBL REMOVING THE BROIL BURNER ASSEMBL 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.
COMPONENT ACCESS REMOVING THE CONVECTION F AN BLADE AND F AN MOT REMOVING THE CONVECTION F AN BLADE AND F AN MOT 5. To remove the fan blade : 1. Turn off the electrical supply and gas supply going to the range and remove the oven racks. - Remove the nut by screwing clockwise.
COMPONENT ACCESS REMOVING THE OVEN LIGHT & SOCKET ASSEMBL REMOVING THE OVEN LIGHT & SOCKET ASSEMBL WARNING CAUTION • DISCONNECT power supply cord • Be careful not to scratch or chip the from the outlet before servicing. oven liner paint when you remove •...
COMPONENT ACCESS REMOVING THE DOOR LOCK ASSEMBL REMOVING THE DOOR LOCK 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. •...
COMPONENT ACCESS REMOVING THE OVEN TEMPERA TURE SENSOR REMOVING THE OVEN TEMPERA TURE 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.
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COMPONENT ACCESS REMOVIING & REPLACING THE DRA REMOVIING & REPLACING THE DRA Replacing the Drawer CAUTION Pull the bearing glides to the front of the chassis glide. • Disconnect the electrical power to Align the glide on each side of the drawer with the glide the range at the main fuse or circuit slots on the range.
COMPONENT ACCESS REMOVING & REPLACING THE LIFT -OFF OVEN DOOR REMOVING & REPLACING THE LIFT -OFF OVEN DOOR To replace the door: CAUTION 1. Firmly grasp • Be careful when removing and both sides of the lifting the door. door at the top. •...
COMPONENT ACCESS REMOVING THE OVEN DOOR HANDLE & GLASS 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. •...
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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.
COMPONENT ACCESS REMOVING THE OVEN DOOR GASKET 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.
COMPONENT ACCESS REMOVING A SIDE P ANEL REMOVING A SIDE P ANEL 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.
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COMPONENT ACCESS REMOVE THE OVEN V VE (SAFETY V REMOVE THE OVEN V VE (SAFETY V & GAS PRESSURE REGULA & GAS PRESSURE REGULA 5. To remove the gas regulator: WARNING a) Remove the 2 fittings and a gas supplier fitting.
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.
Components Test procedures Results Normal: Approximately Door locking Motor 1. Refer to page 3-12 for the servicing procedure 2.6 kΩ ± 10% 2. Measure the resistance If not replace (Multiple meter scale: R x 1000) Abnormal: Infinite(open) below 5Ω (shorted) Door latch Door latch Micro Switch...
Components Test procedures Results Door switch 1. Refer to page 3-8 for the servicing procedure Door open Door closed 2. Measure the resistance after cooling down (Multiple meter scale: R x 1) Continuity Infinite Normal: Approximately 1. Measure the resistance after cooling down Oven lamp 25.7 Ω...
Components Test procedures Results Normal: Approximately 1. Refer to page 3-20 for servicing procedure. Oven (safety) valve 1 ~ 3 Ω 2. Measure the resistance after cooling down. If not replace (Multiple meter scale : R x 1) Upside Downside approximately other 1.
CONVERSION TO LP GAS 2. CONVERT THE GAS PRESSURE WARNING REGULATOR • 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.
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• RECONNECT all grounding devices. - Failure to do so can result in severe personal BURNER OUTPUT RATINGS; BTU/HR injury, death or electric shock. LP (Propane) Gas, 10" W.C.P LRG4115ST MODEL ORIFICE CODE BTU RATE CAUTION BURNER 10,000 •...
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• Turn off the electrical supply and 5) For the right front burner of LRG4115ST, the gas supply going to the range. choke and self threading screw will be • Replace all panels and parts before needed as shown Fig Insert the choke into operating.
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CONVERSION TO LP GAS 5. CONVERT THE OVEN BURNER ORIFICES 3) Remove the orifice spud from nozzle holder using a 13/32” or 10mm wrench. BAKE BURNER 4) Install the LP orifce spud(F) to the nozzle holder. To prevent leakage, make sure the I.
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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. •...
COMPOSITION OF CONTROL 2. Composition of control Main PCB ( P/N : EBR80595311) Front Back Touch PCB ( P/N : EBR80089901) Controller assembly NFC PCB ( P/N : EBR78789101) Buzzer PCB ( P/N : EBR76332902)
SVC TEST MODE SEQUENCE OF 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.
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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 54 RY 62 RY 61 RY 60 Broil...
SVC TEST MODE 2 Basic Check Summary Symptom : no heating(F9, F19) Symptom : Oven hot(F6, F16) -. 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...
TROUBLESHOOTING 1. Check the Failure Code When 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.
TROUBLESHOOTING 2. Failure Code Summary Check point Code Description explanation 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.Touch PCB 2.
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...
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TROUBLESHOOTING Power Failed (Dead), No display? Plug the unit Check the button beep. Replace the Check the AC input of Main 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.
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TROUBLESHOOTING Symptom Check Point 1. No heating 1.Check Electrical Wiring 2. F9 2.Check Igniter’s Resistance. 3.Check the Sensor. CN60...
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TROUBLESHOOTING Oven does NOT heat, F9 Replace the ICheck the resistance failed igniter Unplug the unit of each igniter. Normal? (Measure the resistance after cooling down. Reconnect. If The resistance is shown below) defective Is the Connector disconnected harness, or loose? Replace or fix (1) Electric wiring of Main PCB All taps.
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TROUBLESHOOTING Unplug the unit Range Of the resistance Replace the Is the resistance of defected Ω igniter Resistance[ 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...
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TROUBLESHOOTING Symptom Check Point 1. Door Lock System 1. Check the Electrical wiring Failure 2. Check the Motor’s Resistance 2. F10 3. Check the Relay PCB (Door Lock Relay) CN60...
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TROUBLESHOOTING Symptom Check Point 1. Door Lock System 1. Check the Electrical wiring Failure 2. Check the Motor’s Resistance 2. F10 3. Check the Relay PCB (Door Lock Relay) 8-10...
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TROUBLESHOOTING Door Lock System Failure,F10? Plug in the unit Unplug the unit Note : Reconnect. Just after self-clean start, Is the Connector disconnected If defective the door lock motor starts to rotate. or loose? harness, During this time if the door lock switch Check the following : replace or fix does NOT operate properly after...
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TROUBLESHOOTING Replace the Is the door lock switch (micro switch) normal? micro switch measure the resistance of door lock switch normally open type Abnormal Normal Replace the Is the resistance of the lock lock motor motor normal ? measure the resistance of lock motor Normal : approximately 2.6kΩ...
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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 8-13...
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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...
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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.
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TROUBLESHOOTING Symptom Check Point 1. Oven hot 1.Check the Resistance of the Relay. 2. F6 2.Check the Sensor’s Resistance Warm Drawer Heater Broil Broil Safety valve Igniter Conv. Bake Conv. Bake Safety valve Igniter 8-16...
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TROUBLESHOOTING Symptom Check Point 1. Oven hot 1.Check the Resistance of the Relay. 2. F6 2.Check the Sensor’s Resistance CN60 8-17...
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TROUBLE SHOOTING Oven hot, F6? Replace the Is the igniter relay normal? 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...
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TROUBLE SHOOTING Plug in the unit Replace the Is the DLB relay normal? Is the value of thermistor Replace the Measure the resistance Main PCB Main PCB normal? (Refer below) Check with the test mode Normal: infinite To enter the test mode, Abnormal : shorted follow these steps: (1) press the CLEAR button...
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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 8-20...
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TROUBLE SHOOTING Convection fan not work, F7? Replace the Is the fan motor relay normal? Unplug the unit Main PCB Measure the resistance of fan motor relay and Live Normal: infinite Replace the Check the resistance of Abnormal : shorted Fan motor each fan motor.
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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 8-22...
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TROUBLE SHOOTING Symptom Check Point 1. Key not working 1. Check the Door Locking System. 2. F3 Error 2. Check the Electrical Wiring. 8-23...
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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...
APPENDIX Key operation T est sequence Key operation T est sequence How to check button operation 1. Keys should be accessed according to the above sequence and check the beep sound when key is accessed If Key is the normal operation will be the number that corresponds to the Key displayed on the VFD 2.
#EV# EXPLODED VIEW INTRODUCTION MODEL: Customer Model Product Code SVC Model CONTROLLER PARTS COOKTOP PARTS DOOR PARTS 8511 9504 9506 DRAWER PARTS CAVITY PARTS W229...
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