LG DLE4970 Series Service Manual Download

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ELECTRIC & GAS DRYER

SERVICE MANUAL

CAUTION

READ THIS MANUAL CAREFULL Y IN ORDER TO
PROPERL Y DIAGNOSE PROBLEMS AND TO SAFELY
PROVIDE QUALITY SER VICE ON THESE DR YERS.

U.S.A. Website: http://us.lgservice.com

Canadian Website: http://lg.ca

MODEL :

DLE4970*E DLG4971*E

Summary of Contents for DLE4970 Series

Page 1: ... MANUAL CAUTION READ THIS MANUAL CAREFULL Y IN ORDER TO PROPERL Y DIAGNOSE PROBLEMS AND TO SAFELY PROVIDE QUALITY SER VICE ON THESE DR YERS U S A Website http us lgservice com Canadian Website http lg ca MODEL DLE4970 E DLG4971 E ...

Page 2: ...all of the safety warnings in this manual could result in property damage personal injury or death WARNING WHAT TO DO IF YOU SMELL GAS IMPORTANT SAFETY NOTICE RECONNECT ALL GROUNDING DEVICES IMPORTANT Do not try to light a match or cigarette or turn on any gas or electrical appliance Do not touch any electrical switches Do not use any phone in your building Clear the room building or area of all o...

Page 3: ...MISTOR TEST MEASURE WITH POWER OFF 23 9 3 TEST 3 MOTOR TEST 24 9 4 TEST 4 MOISTURE SENSOR 25 9 5 TEST 5 DOOR SWITCH TEST 26 9 6 TEST 6 HEATER SWITCH TEST ELECTRIC TYPE 27 9 7 TEST 7 GAS VALVE TEST GAS TYPE 28 9 9 TEST 8 MOTOR ASSEMBLY DC PUMP 29 10 CHANGE GAS SETTING NATURAL GAS PROPANE GAS 30 11 DISASSEMBLY INSTRUCTIONS 32 12 EXPLODED VIEW 40 12 1 CONTROL PANEL AND PLATE ASSEMBLY 40 12 2 1 CABINE...

Page 4: ...g label on the dryer Gas 120 VAC Electric 240VAC Specifications are subject to change by manufacturer See page 6 of this manual for usage instruction Size 27 X 28 9 X 45 3 inch Dryer capacity IEC 7 3 cu ft Weight 127 4 Ibs Dryer rack 1 each Not on all models OPTIONAL ACCESSORIES ...

Page 5: ...Drum Dryer Rack Child Lock Interior Light Product WxDxH Sensor Power Supply Material Finish Spray 120 V 60 Hz 11 5 A 120 V 240 V 60 Hz 26 A 120 V 208 V 60 Hz 23 A 250W 4 5A 5400W 22 5A 15 W 0 2A 13 W 0 11A x 2 1100W 9 2A 2 4W 0 15A Electronic 7 3 cu ft 127 4 14 6 5 5 Available Available Available Stainless Steel Available Available Available 27 x 28 9 x 45 3 inch Packing WxDxH 29 8 x 31 3 x 47 24 ...

Page 6: ...TION INSTRUCTIONS Dryer Rack Installation Instructions Open the door Hold the dryer rack with both hands Put the dryer rack into the drum Check and be sure that the front of the rack is properly seated behind the lint filter COTTON NORMAL ...

Page 7: ... terminal block screws 3 Connect the ground wire green of the power cord to the external ground screw Remove the neutral ground wire of appliance and connect it to center screw 4 Make sure that the strain relief screw is tightened and that all terminal block nuts are tight and the power cord is in the right position If your local codes or ordinances do not allow the use of a 3 wire connection or y...

Page 8: ...nances do not allow the connection of a frame grounding conductor to the neutral wire use the instructions under Section 3 Optional 3 wire connection 1 Connect the neutral white or center wire B to the center silver colored screw A and tighten securely 2 Connect the other two power cord wires red and black to the left and right terminal block screws and tighten securely 3 Tighten the strain relief...

Page 9: ...e Connector Use only if allowed by local codes Use Design A G A Certified Connector 2 1 8 N P T Pipe Plug for checking inlet gas pressure 3 E q u i p m e n t S h u t O ff V a l v e I n s t a l l e d within 6 1 8 m of dryer 4 Black Iron Pipe Shorter than 20 6 1 m Use 3 8 pipe Longer than 20 6 1m Use 1 2 pipe 5 3 8 N P T Gas Connection 3 Connect to gas supply pipe using a new flexible stainless stee...

Page 10: ... Control Default time Temp Control Cooling Wrinkle care Conditions of operation and termination Temp erature Dry Level Display time Motor Heater Very Dry Normal Adjustable Normal Adjustable Normal Adjustable Normal Adjustable Normal Adjustable Normal Adjustable Off Off 70min 54min 36min 41min 32min 55min 30min 25min 30min 5min 5min 5min 5min 5min 5min 5min 5min 5min Saturation Saturation Saturatio...

Page 11: ...lue Resistance value 5Ω Resistance value Resistance value 5Ω Resistance value 1Ω Resistance value Resistance value Resistance value 1Ω Resistance value 80Ω 100Ω 1 lever open Resistance value 1Ω 2 Lever push close Resistance value Check Top Marking N140 2 Hi limit Thermostat Auto reset 3 Outlet Thermostat Auto reset Check Top Marking N85 4 Lamp holder 5 Door switch Measure resistance of the followi...

Page 12: ...l Open at 370 F Maximum Close at 320 F 8 Thermistor Measure resistance of terminal to terminal Temperature condition 9 Motor See Page 14 10 Gas valve Resistance value 10Ω Resistance value 10Ω Resistance value 20Ω Resistance value 10Ω Electric type Heater case Hi limit Electric type Gas type Gas type Gas type Resistance value 50 800 Ω Resistance value 1 5kΩ Resistance value 1 5 2 5kΩ Resistance val...

Page 13: ...en at 203 41 F 95 5 C Close at 159 41 F 70 5 C Gas type Gas funnel Gas type Gas funnel Measure resistance of terminal to terminal Open at 230 41 F 110 5 C Manual reset Resistance value Continuity XΩ Check Top Marking N95 Check Top Marking N100 Resistance value Continuity XΩ Component Test Procedure Check result Remark ...

Page 14: ...ntact On Off by Centrifugal Switch Ɯ RUN MODE Motor operates Ɯ STOP MODE When Motor does not operate Motor 2 31 3 51 11 11 ᴾᴬ ᴾᴬ Terminal No Mode Centrifugal switch Centrifugal switch Pull Drive forward Resistance Remark Motor STOP Motor RUN Motor Heater Electric Models Heater Electric Models Gas Valve Gas Models Gas Valve Gas Models ...

Page 15: ... Label all wires prior to disconnection when servicing controls Wiring errors can cause improper and dangrous operation Verify proper operation after servicing CAUTION ELECTRIC DRYER WIRING DIAGRAM GAS DRYER WIRING DIAGRAM ...

Page 16: ...d duct vents or hoses decrease efficiency in drying clothes Clogged vents can also cause fire This function alarms you when to clean the ducts When the alarm about duct clogging is on display of the panel your duct vents should be cleaned by yourself or serviceman 8 1 Flow sensor Flow Sensor Function ...

Page 17: ...ast about two minutes The heat will be turned on and the temperatures in the drum will be measured During the three minute test cycle monitor the Flow Sense display on the control panel If no bars are displayed when the cycle ends the exhaust system is adequate If the exhaust system is severely restricted the display will show four bars Other problems may also be shown with error codes Refer to th...

Page 18: ... rerouted Keep the area around the dryer clean and free of clutter Check the vent hood for damage or lint clogging Make sure the area around the vent hood is clear FLOW SENSETM indicator shows four bars during the drying cycle or the display drying many turns restrictions ductwork due to lint buildup or debris restriction in the external dryer venting Install a shorter or straighter duct run See t...

Page 19: ...Thermistor open tE1 PGM Ver 8E8 V008E8 V00 8E9 Elec Type 898 Gas Type Thermistor shorted tE2 AG Thermistor open or shorted tE4 Pump Error Pump runs E5 Power off OO Motor runs Displays Moisture Sensor Operation If moisture sensor is contacted with damp cloth The display number is below180innormalcondition 30 High moisture 239 Low moisture Current Temp 5 70 Current Temp 5 70 Pump AD valve 11 255 Ele...

Page 20: ... between connector BK2 or WH2 Black Wire linked to the Controller and BL2 White Wire Is 110 125V Check if the Controller wire is disconnected Check if Terminal Block and Power Cord are connected Check Plug Does Power Cord N Natural line match to Terminal Center N Natural line Replace controIler Reconnect the controller Check if Power Cord is properly connected Check the fuse or circuit breaker YES...

Page 21: ...elay Black Housing Black Tab Relay Check the Matching color Between Harness wire and Tab Relay White Housing White Tab Relay White Low Extra Low Low Extra Low on on on on on O O O O on off off Temperature Control below 68ᴦ 4 Turn on Heater1 and Heater2 Temperature Control below 52ᴦ 4 Only Turn on Heater1 Temperature Control below 70ᴦ 4 Turn on Burner ҳ PCB ASSEMBLY LAYOUT Temperature Control below...

Page 22: ...g and Wire ၂ ၃ CROSS Wire ၂ ၃ CROSS Off Off Normal Heater1 Off Off Off Normal Heater2 Off Off Off Power Off Power Off Power On Power On Power Off Power Off ҳ Heater1 Operation black Heater1 Operation black Heater2 Operation White Heater2 Operation White PCB condition Of operation PCB condition Of operation 3 Incorrect Connection Error and Results Incorrect Connection of the Tab Relay and Connector...

Page 23: ...d Pin ၅ Orange Wire to controller Check if control and the 6 pin connector are properly connected Replace controller Replace thermistor Check if resistance is in the range of Table 1 when measuring resistance between terminals after separating harness from thermistor assembly connector Check harness linking connector Take the NA6 Connector from the Controller NO NO YES YES Ɯ Table 1 Resistance for...

Page 24: ... connector Replace outlet Thermostat Refer to component Check Idler assembly Drum belt cuts off Drum belt takes off from Motor pulley Replace Idler switch Is resistance below 3Ω between connector BL2 White wire and WH4 Yellow wire Measure while door is closed Is resistance below 3Ω between connector WH4 Yellow wire and WH4 Brown wire Is resistance below 1Ω between terminals of outlet thermostat at...

Page 25: ...ce below 1Ω Check electro Load and harness connector Check harness linking connector Replace control and check When contacting cloth to electro load 1 Is the measurement within the range of Table 2 during Diagnostic Test 2 Is the measurement within the range of Table 2 when measuring the voltage in the NA6 connector s Pin Orange wire and Pin Blue wire Normal Condition IMC 70 40 40 20 10 Dried clot...

Page 26: ...eck Refer to component testing Check lamp When opening lamp replace then measure again Door switch check Refer to component testing Door switch check Refer to component testing Door switch check Refer to component testing Measure while door is open Check it resistance is 300 60 Ω between BL2 White wire and BK2 Black wire Connector BL2 WH4 after taking BL2 WH4 out from controller Measure while door...

Page 27: ... condition YES NO Check motor and replace it 1 Is resistance between heater terminal and below 18 22Ω 2 Is resistance between heater terminal and below 18 22Ω 3 Is resistance between heater terminal and below 9 11Ω YES NO Replace heater Check if the value of measured resistance is below 1Ω between terminal TH2 Safety thermostat YES NO Replace TH2 Safety thermostat and TH3 Hi Limit thermostat Check...

Page 28: ...s more than DC 90V 10 sec after Igniter off When measuring terminal resistance on valve 1 and valve 2 valves are more than1 5 2 5kΩ Measure after off If valve 1 and valve 2 are under DC 10V valves are Off Harness check Controller change Check thermostat hi limit safety Check Igniter frame detect Check gas connection or gas supply Change valve Change valve YES YES YES YES YES NO NO NO NO NO NO Valv...

Page 29: ...e During diagnostic test E5 error occur Turn the dryer s power off then measure resistance After activating the diagnostic test press START PAUSE button 4 times Is AD value displayed higher than 10 Replace the DC pump Normal condition YES NO diagnostic test go to page 23 ᅐ Test 8 Motor Assembly DC Pump Caution Trouble Symptom MeasurementCondition 29 ...

Page 30: ...propane LP using natural gas could result in fire explosion or personal injury Conversion must be done a qualified technician The dryer is set for natural gas at the factory A propane conversion kit is available through the parts department to licensed technicians only The part numbers are listed below ...

Page 31: ...31 31 VALVE 1 IGNITER VALVE 2 FLAME DETECT NO NO YES YES ...

Page 32: ...ift each corner of the back panel then roll it forward so it rests on top of the dryer 3 With a flat blade screwdriver press the tabs on the side of the PWB PCB box and gently pry it open 4 Disconnect the wiring from the PWB PCB board 5 Disassemble the control panel assembly from top cover Disassemble and repair the unit only after pulling out power plug from the outlet 32 ...

Page 33: ...PANEL PANEL REAR ELECTRIC 1 Remove 8 screws from control panel assembly 2 Separate PCB from control panel 1 Remove 1 screw 2 Pull out the cover 1 Remove 3 screws 2 Disassemble terminal block and wire from panel rear ...

Page 34: ...34 PANEL REAR COMMON 1 Remove 3 screws remained on the panel rear 2 Lift out the panel rear ...

Page 35: ...o change top cover 1 Disassemble 3 screws on the control panel 2 Disassemble the screws on the rear cover 2 1 Disassemble terminal block with power cord 2 2 Disassemble both side of rear cover Steam dryer only ...

Page 36: ...sassemble rear panel and both side screws 4 Disassemble PCB cover and housing from the PCB 5 Please push the 2 spots hooks by using paddle between top cover and door cabinet 6 You can open the top cover Hooks ...

Page 37: ...37 7 Disassemble 2 earth screws and housing on the top cover 8 The harness has to be put in the hole 9 Disassemble another parts and replace the cover ...

Page 38: ... the door and remove the 6 screws from the cabinet cover then close the door 2 Remove the 2 screws then tilt the cabinet cover toward the front of dryer slightly 3 Disconnect wiring to the door switch and lift the cabinet cover ...

Page 39: ...e removing the screw 3 Slide the shield up and remove 4 Remove the bulb and replace with a 15 watt 120 volt candelabra base bulb 5 Replace the lamp shield and screw 1 Disassemble the top plate 2 Remove cabinet cover 3 Disconnect the door lamp and electrode sensor connector 4 Remove 4 screws 5 Disassemble the tub drum Front 36 WARNING WHEN YOU DISASSEMBLY THE LAMP CONNECCTOR BE SURE TO TAKE GLOVES ...

Page 40: ...HE RISK OF PERSONAL INJURY ADHERE TO ALL INDUSTRY RECOMMENDED SAFETY PROCEDURES INCLUDING THE USE OF LONG SLEEVED GLOVES AND SAFETY GLASSES FAILURE TO FOLLOW ALL OF THE SAFETY WARNING IN THE MANUAL COULD RESULT IN PROPERTY DAMAGE PERSONAL INJURY OR DEATH 1 DR YER EXHAUST CHANGE DUCT TAPE DUCT TAPE DUCT TAPE 2 2 2 1 ڹ ں ڻ 3 1 3 2 ...

Page 41: ...p plate 2 Remove the cabinet cover and tub drum Front 3 Remove the drum assembly 4 Remove 2 screws and cover Air guide 5 Remove the bolt and washer 1 Disassemble the top plate 2 Remove the cabinet cover and tub drum Front 3 Remove the drum assembly 4 Remove 7 screws 5 Pull the tub drum Rear towards the front 6 Remove the fan 7 Disconnect the motor clamp and motor ...

Page 42: ...emove the filter and 2 screws 1 Disassemble the top plate 2 Remove the cabinet cover and tub drum Front 3 Remove the drum assembly and tub drum Rear 4 Disconnect the air duct from the tub drum Front 4 Remove the air duct 5 Remove the roller from the tub drum Front and tub drum Rear ...

Page 43: ...43 Φ Φ Φ Φ ...

Page 44: ...VJG UKNXGT EGPVGT UETGY DGJKPF VJG JKPIG HVGT VJCV QQUGP VJG VQR UETGY 4GOQXG VJG VJTGG UETGYU QP VJG DQVVQO NGHV JKPIG QP VJG HTQPV RCPGN TGOQXG VJG JKPIG CPF TGKPUVCNN KV QP VJG TKIJV UKFG HVGT VJCV QQUGP VJG VQR UETGY 4GOQXG VJG UETGYU KP VJG EKTENG TGOQXG VJG FCORGT HTQO CDKPGV QXGT ...

Page 45: ...45 0 5GRCTCVG VJG QQT HTQO CDKPGV QXGT 5GRCTCVG VJG JCPFNG FGEQ WUKPI C UOCNN HNCV DNCFG KPUGTVGF KP VJG ICR 5GRCTCVG VJG JCPFNG HTQO FQQT CPFNG FGEQ KU GCU VQ DG DTQMGP ...

Page 46: ...46 ...

Page 47: ...47 4 ...

Page 48: ...e latch hole cover using the two screws removed in step 3 screwdriver being careful not to scratch the paint Rotate the hinge cover 180 degrees and install it on the opposite side where the upper hinge was attached THE DRYER DOOR IS VERY LARGE AND HEAVY Failure to follow the instructions below can result in damage to the dryer property damage or personal injury The edges of the door cover may be s...

Page 49: ...t Remove the hinge and reinstall it on the right side The top screw occupies the hole where you removed the screw behind the hinge bracket in step 6 8 Install the hinge bracket removed in step 6 on the bottom left side 9 With the door laid inside facing up on a protected surface remove the Φ5 screw 10 Remove the four screws on the door cover that secure The door strike and the blank cover Switch t...

Page 50: ...50 ...

Page 51: ...he door 17 Rotate the top lock rod removed in step 14 180 degrees end for end from its original position and reinstall it The spring should now be to the right of center with the spring on the side of the rod facing the top of the door Insert the right end of the lock rod into the right hinge assembly Make sure the rod is aligned with the guides in the door panel When released the lock rod should ...

Page 52: ...filler to the hinge bracket d Rotate the hinge filler 180 degrees and snap it back onto the FRONT of the hinge bracket facing in the opposite direction e Mount the lower hinge bracket and the fi ller on the left side of the door with the screw removed in step a 20 Flip the side lock rod over and install it on the opposite side Insert the lower end into the left hinge and lower the rod into the gui...

Page 53: ...screws removed in step 9 NOTE Please check again if the spring is well assembled into the Outer Door Panel 23 While supporting the door install the four hinge screws removed in step 2 Test the swing of the door to make sure the hinges and latch are properly aligned and that the door opens closes and latches properly in both directions If the door doesn t operate smoothly remove the door and then t...

Page 54: ...54 ...

Page 55: ...55 ...

Page 56: ...56 EXPLODED VIEW 40 14 1 Control Panel And Plate Assembly A140 A120 A215 A570 A210 A150 A130 A110 A211 A211 A117 ...

Page 57: ...1 A314 A330 A315 A325 A320 A300 A310 A400 A440 A438 A485 A484 A481 A437 A480 A436 A430 A491 A434 A435 A487 A482 A441 A450 A475 A460 A410 A490 A488 A431 A486 A433 A483 A475 A484 14 2 1 Cabinet and Door Assembly Electric Type A390 A380 A340 A370 A360 A316 A420 A560 A365 A439 ...

Page 58: ...314 A330 A315 A325 A320 A300 A310 A400 A440 A438 A485 A484 A481 A437 A480 A436 A430 A491 A434 A435 A487 A482 A441 A450 A475 A460 A410 A490 A488 A431 A486 A433 A483 A475 A484 A439 14 2 2 Cabinet and Door Assembly Gas Type A390 A380 A340 A370 A360 A316 A420 A560 A131 A365 ...

Page 59: ...K224 K230 K210 K350 K240 F130 F110 F120 F140 K540 K660 K515 K510 K520 K251 K250 K550 K560 K655 K530 K610 K620 K360 K330 K310 K251 K250 K140 K400 F200 K650 K651 K600 K640 K335 K336 14 3 1 Drum and Motor Assembly Electric Type K145 K320 ...

Page 60: ...K240 K350 K510 M220 M141 M160 M171 M170 M140 M110 M181 M180 M190 M230 M250 K540 K650 K520 K550 K250 K560 K250 K251 K224 K230 K225 K251 K360 K530 K651 K600 M210 M171 Propane Gas orifice M170 Natural Gas orifice K515 K660 M150 M240 14 3 2 Drum and Motor Assembly Gas Type K145 K320 ...

Page 61: ...61 APR 2016 PRINTED IN KOREA P No MFL62119977 ...

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