6.3 cu. ft. capacity electric single oven range with 4 cooktop elements (81 pages)
Summary of Contents for LG LRE3061ST
Page 1
Internal Use Only 30” Freestanding Electric Range SERVICE MANUAL CAUTION BEFORE SERVICING THE UNIT, READ THE SAFETY PRECAUTIONS IN THIS MANUAL. MODEL: LRE3061ST LRE3061BD March 2016 P/NO : MFL37118352 Printed in Korea...
Page 2
- Failure to do so can result in severe personal injury, death or electrical shock. • DO NOT Touch when the oven operates. - The interior parts will be very hot. LG Electronics assumes no responsibility for any repairs made on our products by anyone other than Authorized Service Technicians.
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. This is the safety alert symbol.
Page 7
GENERAL GENERAL IMPORTANT SAFETY INSTRUCTIONS CAUTION • Always use Pot Holders or oven mitts when removing food from the Warming Drawer. - You can be burned as cookware and plates will be hot. • Be careful when you work on the electric range handling the sheet metal part. - Sharp edge may be present and you can cut yourself.
Page 8
GENERAL IMPORTANT SAFETY INSTRUCTIONS • Be sure your appliance is properly installed and grounded by a qualified technician. WARNING • Do not repair or replace any part of the appliance unless specifically recommended in the manual. • DO NOT touch heating elements or interior surfaces of All other servicing should be referred to a qualified technician.
Page 9
GENERAL GENERAL IMPORTANT SAFETY INSTRUCTIONS • Clean in the self-clean cycle only parts listed in this manual. Before self-cleaning the oven, remove the broiler pan and any utensils from the oven. WARNING • Never keep pet birds in the kitchen – the health of birds is extremely sensitive to the fumes •...
GENERAL MODEL & SERIAL NUMBER LABEL AND TECH SHEET LOCATIONS The Model/Serial Number label and Tech Sheet locations are shown below. Tech card location Model & Serial on rear cover Number Location -1-5-...
GENERAL SPECIFICATIONS Model Number LRE3061ST / LRE3061BD Category Convection Overall Width 30" Installation type Freestanding Color availability STS, Black, Diamond STS Control Oven Keypad(Membrane) Cooktop Keypad(Membrane) Display Scroll VFD Electronic clock & timer Control lock capability Audible preheat signal Special function Option(6 categories) 1.
Page 12
GENERAL SPECIFICATIONS Model Number LRE3061ST / LRE3061BD Oven Capacity(cu.ft) Broil element 4200 watts Convection element 2000 watts Convection System -Convection element # of Racks 2 standard Interior oven light 120V, 40Watts Proof Cook & warm Favorites Easy clean Door lockout...
USING YOUR RANGE GENERAL INFORMATION Rating Label Broil element Model numbers are recorded on the rating label. Rating label is located on the lower front left corner of the oven frame. It can be seen by opening the storage drawer or warming drawer. Before ordering parts, write down the correct model and serial number from rating label.
USING YOUR RANGE CONTROL PANEL FEATURES 1. BAKE PAD: Press to select the bake function. 11. COOK TIME PAD: Press and then use the number pads to set the amount of time you want your food to cook. The oven will shut off when the cooking 2.
USING YOUR RANGE GENERAL 2. START, CLEAR/OFF AND ON/OFF PAD B Dual surface unit : Left Front 1. Touch START pad to start oven. C Warming Zone : Center Rear 2. Touch CLEAR/OFF pad to cancel a program during cooking or Erase during programming.
USING YOUR RANGE GENERAL GENERAL To increase the oven temperature: 6. BAKE, TIMED BAKE, DELAYED TIMED BAKE 1. Press SETTING pad twice BAKE Desired temperature START 2. Press the desired temperature 3. Press START pad. To decrease the oven temperature: COOK TIME Desired time START...
Audible Diagnosis. your conversation with the call center agent, who will then be able to 4. Press [ ] in the LG Smart ThinQ application for a more detailed guide assist you in using the information transmitted for analysis.
COMPONENT ACCESS This section instructs you on how to service each component inside the range. The components and their locations are shown below. Main PCB Buzzer PCB Cook Top Display PCB Surface Elements Door Switch Oven Light Oven Sensor Broil Heater Convection Motor Relay PCB Hinge Hanger...
COMPONENT ACCESS REMOVING THE LAMP, CONTROLLER, BACK COVER AND CONTROLLER ASSEMBLY(MEMBRANE, PCB, SUPPORT) 6. Remove 6 screws and wiring from Main PCB and Buzzer PCB. The WARNING PCBs can be detached from the support assembly • DISCONNECT power supply cord from the outlet before servicing.
Page 20
COMPONENT ACCESS 8. Remove 4 screws from Cooktop Display PCB and the PCB can be 11. Remove 6 screws from the controller assembly. detached from the support. 9. Remove a cooktop plate assembly (See the page 3-6) and remove 4 screws from side panel. 12.
COMPONENT ACCESS REMOVING PCBs (MAIN PCB AND RELAY PCB) 4. There are 2 PCBs. When you check PCB, check the proper PCB in WARNING default mode and check Main PCB. • DISCONNECT power supply cord from the outlet NOTE: Refer to the page 5-1~5-6 for composition of control board. before servicing.
COMPONENT ACCESS REMOVING THE SURFACE ELEMENTS AND THE CERAMIC GLASS COOKTOP WARNING Lift up the cooktop assembly and turn the cooktop • DISCONNECT power supply cord from the outlet assembly over (protect the cooktop surface). before servicing. • Replace all panels and parts before operating. •...
Page 23
COMPONENT ACCESS REMOVING DOOR SWITCH 4. To remove the door switch: WARNING a) If not already done, raise the cooktop (See the page 3-6 for the procedure). • DISCONNECT power supply cord from the outlet b) Remove wiring from the door switch before servicing.
COMPONENT ACCESS REMOVING THE BROIL ELEMENT * 2 screws of the rear bracket do not only fasten broil heater’s rear bracket WARNING but also a thermistor. While servicing broil elements, the thermistor also should be disassembled. • DISCONNECT power supply cord from the outlet before servicing.
COMPONENT ACCESS REMOVING THE CONVECTION, FAN BLADE AND FAN MOTOR 1. Disconnect power and remove oven racks. CAUTION 2. Pull the range out of its mounting location so that you can access the rear of the unit. • Be careful when you work on the electric range 3.
COMPONENT ACCESS REMOVING THE OVEN LIGHT & SOCKET ASSEMBLY WARNING CAUTION • DISCONNECT power supply cord from the outlet • Be careful not to scratch or chip the oven liner paint before servicing. when you remove the oven light socket in the next •...
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 electrical shock.
COMPONENT ACCESS REMOVING & REPLACING THE LIFT-OFF OVEN DOOR To replace the door: WARNING • Be careful when removing and lifting the door. Firmly grasp both sides of the door at the • DO NOT lift the door by the handle. top.
COMPONENT ACCESS REMOVING THE OVEN DOOR HANDLE 4. Turn the door over. Remove 3 screws from the door cover assembly WARNING and detach the bracket • DISCONNECT power supply cord from the outlet before servicing. • Replace all panels and parts before operating. •...
Page 30
COMPONENT ACCESS REMOVING THE OVEN DOOR HANDLE WARNING • DISCONNECT power supply cord from the outlet before servicing. • Replace all panels and parts before operating. • RECONNECT all grounding devices. Bracket - Failure to do so can result in severe personal injury, death or 5.
Page 31
COMPONENT ACCESS 7. To remove the door’s inner glass assembly: a) Remove 6 screw. b) Detach the inner cover and the inner glass assembly can be detached. REASEMBLY NOTE: When you reinstall the insulation around the oven door glass, make sure that the insulation is not visible in the glass after the door is reassembled.
COMPONENT ACCESS REMOVING THE OVEN DOOR GASKET Gasket clip WARNING • DISCONNECT power supply cord from the outlet before servicing. • Replace all panels and parts before operating. • RECONNECT all grounding devices. 3. Pull the ends of the gasket out of the liner holes. - Failure to do so can result in severe personal injury, death or electrical shock.
COMPONENT ACCESS REMOVING THE OVEN DOOR GASKET 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 34
COMPONENT ACCESS 8. Pull the back of the side panel out from the range approximately 10˚. Push forward and remove the side panel. -3-17-...
COMPONENT TEST Before testing any of components, perform the following checks: 3. Resistance checks must be made with power cord unplugged from NOTE: outlet, and with wiring harness or connectors disconnected. 1. The most common cause for control failure is corrosion on connectors.
COMPONENTS TEST PROCEDURE RESULTS Oven Sensor 1. Refer to page 3-13 for the servicing procedure Normal: Approximately 2. Measure the resistance after cooling down 1.09 kΩ ± 10% (Multiple meter scale: R x 1000) If not replace NOTE: Ω Value was tested at room temperature (77F/25˚C) Conv.
COMPONENTS TEST PROCEDURE RESULTS Oven lamp 1. Measure the resistance after cooling down Normal: Below 5 Ω. (Multiple meter scale: R x1) If not replace Broil heater 1. Remove wire leads Normal : Approximately 13.7Ω 2. Measure resistance after cooling down Abnomal : Infinite(opened) NOTE: Ω...
COMPONENTS TEST PROCEDURE RESULTS Single surface units: 1. Refer to page 3-6 for the servicing procedure Left Rear(LR) 2. Set the Multiple meter scale to the R x 1 Right Rear(RR) 3. Disconnect wires from cook-top elements Element 4. Touch the ohmmeter test leads to the element terminal and 1A. The meter should indicate 46 Ω...
Page 39
COMPONENTS TEST PROCEDURE RESULTS Single surface units: 1. Refer to page 3-6 for the servicing procedure Right Front (RF) 2. Set the Multiple meter scale to the R x 1 3. Disconnect wires from cook-top elements 4. Touch the ohmmeter test leads to the element terminal and 1A.
Page 40
COMPONENTS TEST PROCEDURE RESULTS Single surface units: 1. Refer to page 3-6 for the servicing procedure Left Rear(LR) 2. Set the Multiple meter scale to the R x1 Right Rear(RR) 3. Disconnect wires from cook-top elements Element 4. Touch the ohmmeter test leads to the (4 & 2A) and (3 & 2A) the meter should indicate : - (4 &...
Page 41
COMPONENTS TEST PROCEDURE RESULTS Center Rear(CR) Element 1. Refer to page 3-6 for the servicing procedure : Warming Zone 2. Set the Multiple meter scale to the R x 1 (Plane Heater) 3. Disconnect wires from CR elements 4. Touch the ohmmeter test leads to the between element terminal. The meter should indicate 571 Ω...
COMPOSITION OF CONTROL Wiring Diagram RADIANT COOK-TOP Wattage Ω RR:1200W approx.47Ω LR:1200W approx.47Ω RF:2500W approx. 23Ω 1400W(Inner) approx.41Ω 1800W(Outer) approx.32Ω WARM ZONE: 100W approx.570Ω < TABLE 1 > WIRE COLORS SYMBOL COLOR WHITE BLACK YELLOW PINK BLUE BROWN GREEN GRAY ORANGE VIOLET -5-1-...
Page 44
COMPOSITION OF CONTROL Back Front Controller assembly Main PCB (Loc No. : 2006) Oven Relay PCB (Loc No. : 5070) Cook top display PCB (Loc No. : 2031) Key Pad Buzzer PCB -5-3-...
CHECK THE FAILURE CODE ■ When the oven has some failure on cooking, If the oven do not has any failure, the Oven will show it like FIG. 2 Cooking will be canceled automatic value and logs of F-come Times of the occurred failure Type of F-Code will be recorded in EEPROM.
Page 49
CHECK THE FAILURE CODE GENERAL Code Description How to detect Check point Sensor open Oven Thermistor is open 1. Wiring 2. Oven Sensor Sensor short Oven Thermistor is short 1. Wiring 2. Oven Sensor Button short When some button is continuously short for >= 60 seconds. 1.
BASIC CHECK SUMMARY Symptom : Symptom : Oven hot(F6) Symptom : no heating(F9) Oven lamp not operating -. Check: : All heater relays are -. Check: All heater relays and open/short DLB relay are open -. Check the Lamp coil’s resistance Symptom : Sensor error or no heating (F1,F2,F9) -.
CHECKING FLOW CHART BY FAILURE Symptom Check Point 1. Power Failure 1. Check Electric Wiring (Dead) 2. Check the Main PCB Input Voltage with CN01 2. No Display -9-1-...
CHECKING FLOW CHART BY FAILURE Power Failed (Dead), Unplugged the unit No display? Is the connector connected to Main Reconnect or repair the Plug the unit PCB disconnected or disassembled? connector (CN1) Check the button beep. Touch the Clear button, Change the Main PCB Can hear the beep sound? Is the voltage normal?
Page 53
CHECKING FLOW CHART BY FAILURE Is the electric wiring normal? Replace the defective harness Measure the resistance Power cord and CN01’s connection Normal : continuity Normal Abnormal Abnormal: infinite - Code L1 to Pin1 of CN01(RD) - Code N to Pin3 of CN01(WH) RD color is L1.
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. Main PCB Heater Resistance CHECK Sensor Resistance CHECK -9-4-...
Page 55
CHECKING FLOW CHART BY FAILURE Oven does not heat, F9 Broil Unplugged the unit Is the disconnect or loose connector? Reconnect or repair the 1. Between Main PCB and connector Relay PCB (CN17) 2. Electric wiring of relay PCB All taps. 3.Electric wiring of electric element Bake CN17...
Page 56
CHECKING FLOW CHART BY FAILURE Unplugged the unit Range Of the resistance Resistance[Ω] Heater Approximately Is the resistance of thermistor normal? Replace the failed Broil 13.7 thermistor Bake 16.5 Check: Pins 1and 2 of CN13 wiring in main PCB Plug the unit Normal- approximately 1.09kΩ...
CHECKING FLOW CHART BY FAILURE Symptom Check Point 1. Cook top 1. Check Electric Wiring No heating 2. Check the Resistance of each Heater -9-7-...
Page 58
CHECKING FLOW CHART BY FAILURE Oven does not heat Replace the defected Measure the resistance of each heater. heater (The resistance is shown below) Unplugged the unit Right rear Is the Connector disconnected loose? Reconnect or adjust the connection 1. Electric wiring of Main PCB All taps. Left rear All Taps Warm zone...
Page 59
CHECKING FLOW CHART BY FAILURE Left Front Outer Range Of the resistance Resistance[Ω] Heater Approximately Right rear Left rear Right front Left Front (Inner) Left Front (Outer) Center Rear Left Front Inner Replace the Main PCB Right Front Outer -9-9-...
Page 60
CHECKING FLOW CHART BY FAILURE Symptom Check Point 1. Sensing Fail 1.Check the Electric Wiring 2. F1 2.Check the Test Mode 3. F2 3.Check the Sensor’s Resistance -9-10-...
CHECKING FLOW CHART BY FAILURE Plug the unit Sensing Fail, F1, F2? Is the value of thermistor normal? (Refer below) Check with the test mode Go to No 1 Unplugged the unit To enter the test mode, follow these steps: 1.
Page 62
CHECKING FLOW CHART BY FAILURE Symptom Check Point 1. Oven hot 1. Check the Resistance of the Relay. 2. F6 Relay Short check -9-12-...
CHECKING FLOW CHART BY FAILURE Oven hot, F6? Bake(RY104) Relay Resistance Unplugged the unit Replace the failed Is the resistance of thermistor normal? thermistor Check: Pins 1 and 2 of CN13 wiring in main PCB CN101 1 st pin and 2 nd pin Normal- approximately 1.09kΩ...
Page 64
CHECKING FLOW CHART BY FAILURE Plug the unit Is the value of thermistor normal? (Refer below) Check with the test mode Go to No 6 To enter the test mode, follow these steps: 1. press the “CLEAR” button 2. press the “BAKE”, “BROIL” button at the same time 3.
CHECKING FLOW CHART BY FAILURE Symptom Check Point 1. Keypad Failure 1. Check the Door Locking System. 2. F3 Error 2. Check the Electric Wiring. -9-15-...
Page 66
GENERAL Plug the unit F3 error (Button short error) Replaced the Key pad. Or button does not input And then check button operation using key Go to No 1 test mode Unplugged the unit To enter the test mode, follow these steps: 1.
APPENDIX Key operation Test First Last <Fig.1> ※ How to check button operation 1. Keys should be accessed according to the above sequence and check the beep sound when key is accessed 2. If change the key access order, the buzzer make double beep sound 3.
TROUBLE SHOOTING PROBLEMS POSSIBLE CAUSES SOLUTIONS Oven not operating. • Bad main PCB • Test and/or replace PCB ➞ Refer to the page 9-1~9-3 • Power outage • Verify power is present at unit. • Verify that the circuit breaker is not tripped •...
Page 69
TROUBLE SHOOTING PROBLEMS POSSIBLE CAUSES SOLUTIONS Electronic timer will not accept • Failed main PCB • Replace main PCB Programming. Electronic timer will not accept • Failed main PCB • Replace main PCB Programming. Clock and timer not working • Power outage •...
Page 70
TROUBLE SHOOTING PROBLEMS POSSIBLE CAUSES SOLUTIONS Oven door sagging on one side • Hinge loose or out of position to oven liner • Adjust hinges or replace hinges Door does not close completely at top • Broken or misadjusted door spring •...
SCHEMATIC DIAGRAM NOTE: WARNING Schematic diagram shows POWER MUST BE DISCONNECTED BEFORE oven door opened and SERVICING THE APPLIANCE. FAILURE TO DO SO unlocked.All elements are set to “OFF”. CAN RESULT IN DEATH OR ELECTRICAL SHOCK. RADIANT COOK-TOP Wattage Ω RR:1200W approx.47Ω...
SCHEMATIC DIAGRAM STRIP CIRCUITS BROIL Complete the following steps before checking electric oven circuit 1.Check the line voltage, household fuse or circuit breaker. 2.Check for loose wiring or mis-wiring within electric range. NOTE: The following individual circuits are for use in diagnosis, and are shown in the ON position.
Page 73
SCHEMATIC DIAGRAM GENERAL CR (Warming Zone) RF Cook-top Element RR Cook-top Element LF Cook-top Element LR Cook-top Element -12-3-...
#EV# EXPLODED VIEW INTRODUCTION MODEL: Customer Model Product Code SVC Model CONTROLLER PARTS COOKTOP PARTS DOOR PARTS CAVITY PARTS DRAWER PARTS 9504 9506...
Need help?
Do you have a question about the LRE3061ST and is the answer not in the manual?
Questions and answers