LG DLEX4270 Series Page 16 Service Manual Download

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Component

Test Procedure

Check result

Remark

13. Outlet Thermostat

(Auto reset)

•

Check Top Marking:

N95

Measure resistance of terminal

to terminal

Open at 203 ± 41°F (95± 5°C)
Close at 158 ± 41°F (70± 5°C)

Resistance value

≒

Continuity < 1

•

Gas type

•

Gas funnel

14. Outlet Thermostat

(Manual reset)

•

Check Top Marking:

N110

Measure resistance of terminal

to terminal

Open at 230 ± 41°F

(110 ± 5°C)
Manual reset

Resistance value

≒

Continuity < 1

•

Gas type

•

Gas funnel

FOR LG TECHNICIAN

Summary of Contents for DLEX4270 Series

Page 1: ...UTION READ THIS MANUAL CAREFULLY TO DIAGNOSE PROBLEMS PROPERLY AND TO PROVIDE QUALITY SERVICE SAFELY ON THESE DRYERS U S A Website http us lgservice com Canadian Website http lg ca MODEL Electric Gas DLEX4270 DLGX4271 FOR LG TECHNICIAN 1 ...

Page 2: ...nt everywhere ESD may damage or weaken the electronic control assembly The new control assembly may appear to work well after repair is finished but failure may occur at a later date due to ESD stress Use an anti static wrist strap Connect wrist strap to green ground connection point or unpainted metal in the appliance OR Touch your finger repeatedly to a green ground connection point or unpainted...

Page 3: ...E WITH POWER OFF 29 10 3 TEST 3 MOTOR TEST 30 10 4 TEST 4 MOISTURE SENSOR 31 10 5 TEST 5 DOOR SWITCH TEST 32 10 6 TEST 6 HEATER SWITCH TEST ELECTRIC TYPE 33 10 7 TEST 7 GAS VALVE TEST GAS TYPE 34 CONTENTS 10 8 TEST 8 MOTOR ASSEMBLY DC PUMP 35 10 9 TEST 9 GENERATOR ASSEMBLY 35 11 CHANGE GAS SETTING NATURAL GAS PROPANE GAS 36 12 DISASSEMBLY INSTRUCTIONS 38 13 EXPLODED VIEW 48 13 1 CONTROL PANEL AND ...

Page 4: ...ing detailed information 27 W X 30 D X 38 H 51 D with door open 68 6 cm W X 76 1 cm D X 98 3 cm H 129 7 cm D with door open 11 16 Size Weight Dryer capacity Normal Cycle IEC 7 4 cu ft 22 5 lb 10 2 kg Steam Cycle IEC 7 4 cu ft 8 lb 3 6 kg Gas 148 71 lbs 67 4 kg Electric 145 6 lbs 66 06 kg Power supply 8 e g a p e e S Pedestal 1 each Purchased Separately FOR LG TECHNICIAN 4 ...

Page 5: ...r Rack Child Lock Interior Light Product WxDxH Sensor Power Supply Material and Finish Chrome Elec Gas 120 V 240 V 60 Hz 26 A 120 V 208 V 60 Hz 23 A 120 V 60 Hz 11 5 A 250 W 4 5 A 5400 W 22 5 A 4100 W 21 A 15 W 0 2 A 13 W 0 11 A x 2 1100 W 9 2 A 2 4 W 0 15 A Electronic 7 4 cu ft 146 149 14 5 5 5 Available Available Available Stainless Available Available Available Packing WxDxH AC 240 V Electric M...

Page 6: ...STALLATION 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 FOR LG TECHNICIAN ...

Page 7: ...e a stacking kit with a gas dryer in potentially unstable conditions like a mobile home Stacking Kit Installation Instructions Place the washer firmly on a stable even and solid floor as product installation instructions describe in the owner s manual Do not attempt this alone At least two people are required to lift and position the dryer on top of a washing machine Failure to heed this warning c...

Page 8: ...racted NOTE The appliance and pedestal assembly must be placed on a solid sturdy level floor for proper operation Insert the T clip of the 4 retainers into the dryer base as shown Press up on the back of the clip and pull outward to lock into place Place the dryer on the pedestal Make sure the front and back feet are in the correct positions The dryer feet will fit into the innermost positions as ...

Page 9: ... inch 3 8 cm from 3 other wires peel insulation back 1inch 2 5 cm Make ends of 3 wires a hook shape Then put the hooked shape end of the wire under the screw of the terminal block hooked end facing rightward and pinch the hook together and screw tightly Use the instructions under option 1 if your home home has a 4 wire receptacle NEMA type 14 30R If this type is available at your home you will be ...

Page 10: ... the screw of the terminal block hooked end facing rightward and pinch the hook together and screw tightly 1 2 5 cm 3V2 8 9 cm 3 wire connection Direct wire 1 Connect the neutral wire white of the power cord to the center terminal block screw 2 Connect the red and black wires to the left and right terminal block screws 3 Connect the ground wire green of the power cord to the external ground screw ...

Page 11: ...ermit the connection of a frame grounding conductor to the neutral wire use these instructions If your local codes or ordinances do not allow the connection of a frame grounding conductor to the neutral wire use the instructions under Option 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 po...

Page 12: ...onnections securely Turn on gas and check all pipe connections internal and external for gas leaks with a non corrosive leak detection fluid 5 For LP Liquefied Petroleum gas connection refer to section on Gas Requirements For further assistance refer to section on Gas Requirements 1 New Stainless Steel Flexible Connector Use only if allowed by local codes Use Design A G A Certified Connector 2 1 8...

Page 13: ...C 68 4 C 68 4 C 68 4 C 60 4 C 52 3 C 66 4 C 68 4 C 60 4 C 60 4 C 68 5 C 66 5 C 5min 5min 5min 5min 5min 5min 5min 5min 5min 5min 5min 39min 70min Normal Adjustable LOW Saturation 45 5 C 52 3 C 5min 32min 54min 41min 28min 55min 50min 27min 15min 30min 25min Drying Cooling Wrinkle care Time Electro sensor Temp Control Default time Temp Control 3Hr 3Hr Load Motor Heater Temperature Control for each ...

Page 14: ... value Resistance value 5Ω Heater case Hi limit Electric type 3 Outlet Thermostat Check Top Marking N85 Measure resistance of terminal to terminal Open at 185 9 F 85 5 C Same shape as thermal cut off Close Not recovery Resistance value Resistance value 5Ω Blow housing ElectricType GasType Safety 4 Lamp holder Measure resistance of terminal to terminal Resistance value 80Ω 100Ω 6 Idler switch Measu...

Page 15: ...ition 58 F 104F 10 40 C Resistance value 10Ω Heater case Hi limit Electric type 9 Motor See Page 17 10 Gas valve valve 1 valve 2 Measure resistance of the following terminal Valve 1 terminal Valve 2 terminal Resistance value 1 5 2 5 kΩ Gas type 11 Igniter Measure resistance of terminal to terminal Resistance value 50 800 Ω Gas type 12 Flame Detect Measure resistance of terminal to terminal Open at...

Page 16: ...minal to terminal Open at 203 41 F 95 5 C Close at 158 41 F 70 5 C Resistance value Continuity 1 Gas type Gas funnel 14 Outlet Thermostat Manual reset Check Top Marking N110 Measure resistance of terminal to terminal Open at 230 41 F 110 5 C Manual reset Resistance value Continuity 1 Gas type Gas funnel FOR LG TECHNICIAN 16 ...

Page 17: ...On Off by Centrifugal Switch STOP MODE When Motor does not operate RUN MODE Motor operates When checking components turn the power off and discharge voltage NOTE Centrifugal switch Centrifugal switch Pull Drive forward FOR LG TECHNICIAN 17 ...

Page 18: ...OR GREEN Smart Modem Connector DISPLAY PCB MAIN PCB MAIN PCB SMART READY model only GREEN YELLOW WHITE Smart Modem Connector DISPLAY PCB SMART READY model only STEAM model only STEAM model only YELLOW WHITE FOR LG TECHNICIAN 18 ...

Page 19: ...Main PCB Picture P N EBR76542925 Electric EBR76542926 Gas Electric Gas Tab relay Blue Tab relay White YL3 BL2 WH4 CN11 WH4 Tab relay Black Tab relay Blue BL3 YL3 BL2 WH4 CN11 WH4 Tab relay Black 19 ...

Page 20: ...ASY IRON HEAVY DUTY COTTON TOWELS NORMAL PERM PRESS DELICATES REDUCE STATIC EASY IRON STEAM OPTION TIME DRY Shirt 70 cotton 30 poly blend Except especially delicate fabrics DEFAULT TIME TEMP CONTROL DRY LEVEL FABRIC STATE MAXIMUM AMOUNT FABRIC TYPE The steam feeder must be filled with water up to the MAX line Otherwise an error message will be displayed If the lint filter or exhaust duct is clogge...

Page 21: ...n steam cycle starts Steam doesn t generate but no error code is shown Garments still wrinkled after STEAM FRESH There are no creases left on garment after STEAM FRESH Garments have static after REDUCE STATIC Garments are too damp or too dry after REDUCE STATIC Garments are not uniformly damp after EASY IRON Water drips from door during steam cycle This is normal Steam vapor is difficult to see wh...

Page 22: ...ayed in the test mode Replace the steam generator Water supply pump When the pump valve is less than 10 in the test mode E5 PS EE tE5 error is only displayed in the test mode Check the connection between harness wire and connector Replace the water supply pump Steam generator Wire Connection Black White Red EE PROM Error Sensors do not detect that steam generator is full within 60 seconds Wire Con...

Page 23: ...tures of the LG Smart Laundry DW application When you use the Tag On function position your smart phone so that the NFC antenna on the back of your smart phone matches the position of the Tag On icon on the appliance If you do not know the position of your NFC antenna move your smart phone very slightly in a circular motion until the application verifies the connection Because of the characteristi...

Page 24: ...ltage value 0 Heater Measure resistance of the following terminal Terminal 1 COM 2 Termi nal 1 COM 3 Terminal 2 3 Resistance value 10Ω Resistance value 10Ω Resistance value 20Ω Thermostat Hi limit Measure resistance of terminal to terminal Open at 257 9 125 5 Close at 221 9 94 7 Resistance value Resistance value 5Ω Thermostat Safety Measure resistance of terminal to terminal Open at 284 41 140 5 A...

Page 25: ...minals after separating harness from thermistor assembly connector Refer to Table 1 Table 1 Resistance for Thermistor Temperature Air TEMP F RES KΩ Air TEMP F RES KΩ Air TEMP F RES KΩ 50 F 10 18 0 90 F 32 C 7 7 130 F 54 2 9 60 F 16 14 2 100 F 38 C 6 2 140 F 60 3 0 80 F 21 11 7 110 F 43 C 5 2 150 F 66 2 5 70 F 27 9 3 120 F 49 C 4 3 160 F 71 2 2 25 ...

Page 26: ...Heating 208 240Vac Stop 0 Troubleshooting for inadequate End user must use correct outlet or have outlet repaired by electrician Defective main PCB Unplug UNIT Check heater elements Terminal 1 COM 2 10Ω Terminal 1 COM 3 10Ω Terminal 2 3 20Ω Unplug UNIT Test thermostats Hi limit Open at 257 9 125 5 Close at 221 9 94 7 5Ω Safety Open at 284 41 140 5 Close at 31 35 5Ω Defective Thermostat If Safety t...

Page 27: ...nce value 1Ω Thermostat Hi limit Measure resistance of terminal to terminal Open at 203 41 95 5 Close at 158 41 70 5 Resistance value Resistance value 5Ω Thermostat Safety Measure resistance of terminal to terminal Open at 230 41 110 5 Close Manual reset Resistance value Resistance value 1Ω Door switch Measure resistance of the following terminal 1 Door switch knob open Terminal COM NC 1 3 Termina...

Page 28: ...lowing termi nal Valve2 terminal Resistance value 1 5kΩ 2 5kΩ Thermistor Check if resistance is in the range of Table 1 when measuring resistance be tween terminals after separating harness from thermistor assembly connector Refer to Table 1 Table 1 Resistance for Thermistor Temperature Air TEMP F RES KΩ Air TEMP F RES KΩ Air TEMP F RES KΩ 50 F 10 18 0 90 F 32 C 7 7 130 F 54 2 9 60 F 16 14 2 100 F...

Page 29: ...eck gas valve Valve1 terminal 1 5kΩ 2 5kΩ Valve2 terminal 1 5kΩ 2 5kΩ Unplug UNIT Check Igniter Resistance value 50 800Ω Unplug UNIT Open at 370 Maximum Close at 320 1Ω Unplug UNIT Test thermostats Hi limit Open at 203 41 95 5 Close at 158 41 70 5 5Ω Safety Open at 230 41 110 5 Close Manual reset Retest heating circuit Defective gas valve Defective Igniter Defective Flame detector Defective Thermo...

Page 30: ... 1Ω 2 Lever push Close Resistance value Outlet Thermostat Measure resistance of terminal to terminal Open at 185 41 85 5 Close Not recovery Resistance value Resistance value 5Ω Motor Measure resistance of terminal to terminal Main Common Sub Common Main White Sub Brown Common Blue Resistance value 4 35Ω 5 at 75 Resistance value 3 37Ω 5 at 75 Door switch COM NO NC Measure resistance of the followin...

Page 31: ...otential for voltages over 100Vac Proceed with care Check the door Switch and hous ing Retest recheck door switch outlet thermostat belt switch motor as sembly harness Check belt Drum belt cuts off Drum belt takes off from motor Defective Motor Defective Outlet thermostat Defective Belt Switch Unplug UNIT Check belt switch 1 Lever open Resistance value 1Ω 2 Lever push Close Resistance value Unplug...

Page 32: ...to the need of cleaning the duct When the alarm about Duct clogging is displayed clean the duct or call a servicer to clean them The FlowSenseTM display consists of four bars inside a box The display has only two possible displays as only two possible displays as shown here Also see the figure shown below No bars displayed 4 bars displayed 9 1 Flow Sensor 4 Bars NO Bars CLOGGED Check and Clean Duc...

Page 33: ...accuracy of the results 1 Press START PAUSE button The dryer will start the test which will last about two minutes The heat will be turned on and the temperatures in the drum will be measured 3 Press and hold the SIGNAL and TEMP CONTROL buttons and then press the POWER button This button sequence activates the installation test The code will display if the activation is successful 2 Check the disp...

Page 34: ... some restrictions may still be present in the exhaust system Refer to the Venting the Dryer section of this manual for complete exhaust system and venting requirements Check the Error Code before you call for service Error Code Possible Causes Solutions tE1 or tE2 Temperature sensor failure Turn off the dryer and call for service HS Humidity Sensor failure Turn off the dryer and call for service ...

Page 35: ...off OO Motor runs Displays Moisture Sensor Operation If moisture sensor is contacted with damp cloth The display number is below180 under normal circumstances 255 Low moisture 30 High moisture 1nES Elec Type 1n9S Gas Type d02 U03 DISPLAY PGM MAIN PGM ver 1nES U03 d02 Current Temp 5 70 Current Temp 5 70 Pump AD valve 11 255 Electric control and Temperature sensor ELECTRIC TYPE Motor Heater 1 2700 W...

Page 36: ...ck if power cord is properly connected Reconnect the controller Replace controIler Check if the controller wire is disconnected Check if terminal block and power cord are connected Check Plug Does power cord N Naturall line match to terminal center N Natural line 1 YES NO 2 L Black L Red N White BK or WH BL2 Check if the voltage measured between connector BK or WH Black Wire linked to the controll...

Page 37: ...ween harness wire and tap relay Black housing black tap relay Check the matching color between harness wire and tap relay White housing white tap relay White Low Extra Low Low Extra Low on on on on on O O O O on off off Temperature control below 68 Turn on heater 1 and heater 2 Temperature control below 52 4 4 Turn on only heater 1 Temperature control below 70 4 Turn on burner PCB ASSEMBLY LAYOUT ...

Page 38: ...e 1 Black and white housing CROSS Items Case Heater 1 Operation black Heater 2 operation White PCB condition Of operation CAUTION Improper connection of the heater can damage the heater or the main board CAUTION Connector Housing Black Check the matching color between harness wire and tap relay Black housing black tap relay Color Table 2 Connection of Tap Relay with PCB ASSEMBLY Gas Table1 Incorre...

Page 39: ...roller 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 NO NO YES YES Table 1 Resistance for Thermistor Temperature Air TEMP F 50 F 10 60 F 16 80 F 21 70 F 27 Air T...

Page 40: ...r 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 3 between connector BL2 White wire and WH4 Yellow wire Measure while door is closed Is resistance below 3 between connector WH4 Yellow wire and WH4 Brown wire Is resistance below 1 between terminals of outlet thermostat atta...

Page 41: ...isplayed should be between 30 and 255 The numbers should start decreasing as the control senses the moisture in your skin 7 After you have observed the number decreasing remove your fingers from the sensor bars The numbers will continue to decrease for a few seconds minimum 30 and the begin to increase maximum 255 8 If this test fails proceed with the MECHANICAL TEST below Test 4 Moisture Sensor Y...

Page 42: ...CAL TEST below If the error displays and light comes on the door switch is working properly Test 5 Door Switch Test BL2 1 3 4 2 WH4 1 3 4 2 NO NO NO YES YES YES WH4 Disconnect the WH1 and BL3 connector from the main PCB Measure the resistance between the NA6 GN pin and a chassis ground screw Is the resistance 1 Disconnect the BL2 and WH4 connector from the main PCB Measure the resistance between B...

Page 43: ...e black tab relay connector Is the resistance 18 22 Measure the resistance between YL3 WH and the YL wire on the white tab relay connector Is the resistance 18 22 Measure the resistance between the BL wire on the black tab relay and the YL wire on the white tab relay connectors Is the resistance 36 44 Measure the resistance between terminals 1 RD and the heater housing Is the resistance 1 Refer to...

Page 44: ...0 sec after igniter off When measuring terminal resistance on valve 1 and valve 2 valves are more than1 5 2 5 kΩ Measure after off If valve 1 and valve 2 read less than 10 V DC are the valves off Harness check Controller change Check thermostat hi limit safety Check Igniter and frame detect Check gas connection or gas supply Change valve Change valve YES YES YES YES YES NO NO NO NO NO NO Valve 1 N...

Page 45: ...n you could damage the main board YES NO Replace the DC pump Normal condition see page 26 for diagnostic test information Test 8 Motor Assembly DC Pump Test 9 Generator Assembly Caution Trouble Symptom Measurement Condition Before measuring resistance be sure to turn power off and discharge voltage When discharging contact the metal plug of power cord with the ground wire During steam cycle genera...

Page 46: ... PCK Remove 2 screws Disassemble the pipe assembly Replace natural gas orifice with propane gas orifice Opened Closed Full open Adjustment screw Close Adjustment screw Orifice Initially Changing orifices and gas valve adjustments improperly can result in an explosion and or fire Conversion must be made by a qualified technician Warning The burner is set for natural gas at the factory The propane o...

Page 47: ...E 2 FLAME DETECT OPEN GAS V AL VE STRUCTURE Adjustment Screw GAS VALVE FLOW START KEY PUSH DRYING F F O 2 E V L A V N O 1 E V L A V VALVE 2 ON IGNITER ON FLAME DETECT OPEN IGNITER TEMPERATURE ABOUT GAS IGNITION FLAME DETECT CLOSE VALVE 2 OFF NO NO YES YES FOR LG TECHNICIAN 47 ...

Page 48: ...y Protect your hands and arms from sharp edges when working To reduce the risk of Injury to persons adhere to all industry recommended safety procedures including the use of long sleeved gloves and safety glasses WARNING THE DRYER TOP PLATE IS VERY LARGE AND HEAVY Fallure to follow instructions can result in damage to the dryer property damage or Injury to persons 1 Remove 3 screws on the upper pl...

Page 49: ...PANEL DRAWER ASSEMBLY 1 Pull out the drawer 2 Lift out the steam feeder 3 Remove 2 screws on the control panel FOR LG TECHNICIAN 49 ...

Page 50: ...embly display 5 Disassemble the control panel assembly WARNING When you disassemble the control panel be sure to disconnect the dryer from its electrical supply Protect your hands and arms from sharp edges when working To reduce the risk of Injury to persons adhere to all industry recommended safety procedures including the use of long sleeved gloves and safety glasses FOR LG TECHNICIAN 50 ...

Page 51: ... Disconnect the harness of door switch WARNING When you disassemble the door switch connector be sure to disconnect the dryer from its electrical supply Protect your hands and arms from sharp edges when working To reduce the risk of Injury to persons adhere to all industry recommended safety procedures including the use of long sleeved gloves and safety glasses FOR LG TECHNICIAN 51 ...

Page 52: ...ve 3 screws on the frame body 2 Push the guide assembly to the back side and then lift it 3 Separate 2 hoses from the pump and generator 4 Lift a pump and generator up GUIDE ASM GUIDE ASM FOR LG TECHNICIAN 52 ...

Page 53: ...FRAME BODY PANEL FRAME 1 Remove 3 screws on the frame body and then disassemble the frame body 2 Remove 4 screws on the panel frame and then remove it FRAME BODY PANEL FRAME FOR LG TECHNICIAN 53 ...

Page 54: ...t your hands and arms from sharp edges when working To reduce the risk of Injury to persons adhere to all industry recommended safety procedures including the use of long sleeved gloves and safety glasses the front bulkhead the front bulkhead TUB DRUM FRONT DRUM ASSEMBLY CHANGING THE DRUM LAMP FOR LG TECHNICIAN 54 ...

Page 55: ...austinstallation besureto disconnectthedryerfromitselectricalsupply Protectyour handsandarmsfromsharpedgeswhenworkinginsidethe cabinet Toreducethe riskofInjurytopersonsadhereto all industryrecommendedsafetyproceduresincludingtheuse of longsleevedglovesandsafetyglasses Note FOR LG TECHNICIAN 55 ...

Page 56: ...binet cover and front bulkhead 3 Remove the drum assembly 4 Remove 2 screws and cover Air guide 5 Remove the bolt and washer 1 Open the top plate 2 Remove the cover cabinet and front bulkhead 3 Remove the drum assembly 4 Remove 7 screws 5 Pull the rear bulkhead towards the front 6 Remove the blower wheel Left hand thread 7 Disconnect the motor clamp and motor FOR LG TECHNICIAN 56 ...

Page 57: ... cover guide 2 Remove 2 screws 3 Remove the air duct 1 Disassemble the top plate 2 Remove the cover cabinet and front bulkhead 3 Remove the drum assembly and front bulkhead 4 Disconnect the air duct from the front bulkhead 5 Remove the rollers from the front bulkhead and rear bulkhead FOR LG TECHNICIAN 57 ...

Page 58: ...3 EXPLODED VIEW 13 1 Control Panel and Plate Assembly FOR LG TECHNICIAN A130 A120 A140 A110 A210 A211 A213 Description LOC NO Tech Sheet G003 The following parts are not illustrated Printed materials 58 ...

Page 59: ...13 2 Panel Drawer Assembly and Guide Assembly K503 K508 K501 A090 A172 A171 A350 K507 K505 K502 A160 A170 K504 K506 A161 FOR LG TECHNICIAN 59 ...

Page 60: ...FOR LG TECHNICIAN 13 3 1 Cabinet and Door Assembly Electric Type A390 A700 A310 A330 A450 A570 A320 A530 A525 A540 A520 A600 A500 A300 A131 A300 A410 A430 A400 A420 A800 A325 A308 A495 A590 A610 ...

Page 61: ...embly Electric Type K120 K100 K130 K222 K221 K350 K240 F110 F120 F130 K210 K540 K230 K510 K520 K251 K360 K251 K250 K530 K600 K650 F140 K640 K560 K620 K310 K400 K410 K140 F200 K250 K330 K320 K550 K610 K651 K340 K515 K224 K655 K660 K336 K335 K338 ...

Page 62: ...AUG 2012 PRINTED IN KOREA MFL62119982 FOR LG TECHNICIAN 64 ...

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