WD1412RT, WD1412RT5, WD1412RT7, WD1412RTA, WD1412RTA5, WD1412RTA7 - LG Washing Machine Service Manual (repair manual)

Model: WD1412RT WD1412RT5 WD1412RT7 WD1412RTA WD1412RTA5 WD1412RTA7
Pages: 66
Size: 16 MB
Type: PDF
Document: Service Manual
Brand: LG
Device: Washing Machine
File: wd1412rt-wd1412rt5-wd1412rt7-wd1412rta-wd1412rta5-.pdf
Date: 2018-11-20

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WASHING MACHINE
SERVICE MANUAL
CAUTION
READ THIS MANUAL CAREFULLY TO DIAGNOSE PROBLEMS
CORRECTLY BEFORE OFFERING SERVICE.
BEFORE SERVICING THE WASHING MACHINE, UNPLUG THE POWER
CORD TO AVOID THE RISK OF AN ELECTRIC SHOCK. 
WHEN  SERVICING  INTERNAL  PARTS,  USE  ONLY  SERVICE  PARTS
SUPPLIED FROM LG. 
AFTER SERVICING THE ELECTRIC WIRE, INSURE THAT INSULATION
TAPE IS APPLIED TO PREVENT AN ELECTRICAL SHORT.
MODEL: WD141 RTA (1~9) / WD1412RT (1~9)
2

2
CONTENTS
1. SPECIFICATIONS ............................................................................................................................. 3
2. FEATURES & TECHNICAL EXPLANATION ..................................................................................... 5
3. PARTS IDENTIFICATION  ................................................................................................................. 7
4. INSTALLATION .................................................................................................................................. 8
5. OPERATION ................................................................................................................................... 14
6. WIRING DIAGRAM / PCB LAYOUT ................................................................................................ 18
7. TROUBLESHOOTING ......................................................................................................................22
7-1.BEFORE PERFORMING SERVICE ......................................................................................... 22
7-2.LOAD TEST MODE .................................................................................................................. 22
7-3.HOW TO CHECK THE WATER LEVEL FREQUENCY ............................................................ 23
7-4.HOW TO CHECK THE TEMPERATURE OF EACH THERMISTOR AT OPERATING CONDITION ...... 23
7-5.ERROR DISPLAY ..................................................................................................................... 24
7-6.TROUBLESHOOTING WITH ERROR ..................................................................................... 26
• IE (Water Inlet Error)  .............................................................................................................. 26
• UE (Unbalanced Error) ........................................................................................................... 27
• OE (Water Outlet Error) .......................................................................................................... 28
• FE (Over Flow Error)  .............................................................................................................. 30
• PE (Pressure Sensor S/W Error) ............................................................................................ 31
• dE (Door open Error) .............................................................................................................. 32
• tE (Thermistor (Heating) Error) ............................................................................................... 33
• LE (Motor Lock Error) ............................................................................................................. 34
• AE (Water leakage)  ................................................................................................................ 36
• dHE (Dry Heater Error) ........................................................................................................... 37
• Dry Heater Trouble  ................................................................................................................. 38
• Dry Fan Motor Trouble  ........................................................................................................... 39
8. TROUBLESHOOTING OTHER ...................................................................................................... 40
• PE (Power Failure or no power)  ............................................................................................. 40
• No power  ................................................................................................................................ 41
• Vibration & Noise during spin  ................................................................................................. 42
• Detergent & Softener does not flow in .................................................................................... 43
• Water Leak  ............................................................................................................................. 44
9. PART INSPECTION ........................................................................................................................ 46
9-1.FILTER ASSEMBLY (LINE FILTER) ......................................................................................... 46
9-2.DOOR LOCK SWITCH ASSEMBLY ......................................................................................... 47
9-3.STATOR ASSEMBLY  ............................................................................................................... 49
9-4.PUMP MOTOR ASSEMBLY ....................................................................................................... 52
9-5.INLET VALVE ASSEMBLY  ....................................................................................................... 53
10. DISASSEMBLY INSTRUCTIONS .................................................................................................. 54
11. EXPLODED VIEW AND PART LIST .............................................................................................. 62

4
To reduce the 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 warnings in this manual could result in property damage, personal
injury or death.
WARNING
ITEM
POWER SUPPLY
PRODUCT WEIGHT
OPERATION WATER PRESSURE
CONTROL TYPE 
DIMENSION
WASH PROGRAM
RINSE
DOOR SWITCH TYPE 
WATER LEVEL 
RESERVATION
SENSING LAUNDRY AMOUNT 
FUZZY LOGIC 
DISPLAY REMAINING TIME
ERROR DIAGNOSIS 
POWER AUTO OFF 
CHILD LOCK 
AUTO RESTART
TIME SAVE
WASH CAPACITY
ELECTRICITY
CONSUMPTION
WASHING
SPIN
DRAIN MOTOR
WASH HEATER
REVOLUTION
SPEED
WASH
SPIN
1400RPM : No Spin / 400 / 800 / 1000 / 1400
46 rpm
100 ~ 1000 kPa (1.0 kgf / cm
2
~ 10.0 kgf / cm
2
)
Electronic
Refer to the Rating Label
600 mm (W) x 640 mm (D) x 850 mm (H)
Cotton, Cotton Eco, Mix, Easy Care, Duvet, Baby Care, 
Skin Care, Sports Wear, Wool, Quick 30, Silent Wash, Rinse+Spin, 
Dry Only, Wash+Dry
Normal, Rinse+, Rinse++, Rinse++Hold, Normal+Hold
PTC+Solenoid
by Pressure Sensor S/W
From 3 hours to 19 hours
Adapted
Adapted
Adapted
10 items
Adapted
Adapted
Adapted
Adapted
190 W
380 W 
30 W
2120 W
220 V ~, 60 Hz
72 kg
WD1412RTA (1~9)

4
To reduce the 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 warnings in this manual could result in property damage, personal
injury or death.
WARNING
ITEM
POWER SUPPLY
PRODUCT WEIGHT
OPERATION WATER PRESSURE
CONTROL TYPE 
DIMENSION
WASH PROGRAM
RINSE
DOOR SWITCH TYPE 
WATER LEVEL 
RESERVATION
SENSING LAUNDRY AMOUNT 
FUZZY LOGIC 
DISPLAY REMAINING TIME
ERROR DIAGNOSIS 
POWER AUTO OFF 
CHILD LOCK 
AUTO RESTART
TIME SAVE
WASH CAPACITY
ELECTRICITY
CONSUMPTION
WASHING
SPIN
DRAIN MOTOR
WASH HEATER
REVOLUTION
SPEED
WASH
SPIN
1400RPM : No Spin / 400 / 800 / 1000 / 1400
46 rpm
100 ~ 1000 kPa (1.0 kgf / cm
2
~ 10.0 kgf / cm
2
)
Electronic
Refer to the Rating Label
600 mm (W) x 640 mm (D) x 850 mm (H)
Cotton, Cotton Eco, Mix, Easy Care, Duvet, Baby Care, 
Skin Care, Sports Wear, Wool, Quick 30, Silent Wash, Rinse+Spin, 
Dry Only, Wash+Dry
Normal, Rinse+, Rinse++, Rinse++Hold, Normal+Hold
PTC+Solenoid
by Pressure Sensor S/W
From 3 hours to 19 hours
Adapted
Adapted
Adapted
10 items
Adapted
Adapted
Adapted
Adapted
190 W
380 W 
30 W
2120 W
127 V ~, 60 Hz
72 kg
WD1412RT (1~9)

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Here you can read online and download LG WD1412RT / WD1412RT5 / WD1412RT7 / WD1412RTA / WD1412RTA5 / WD1412RTA7 Service Manual in PDF. WD1412RT / WD1412RT5 / WD1412RT7 / WD1412RTA / WD1412RTA5 / WD1412RTA7 service manual will guide through the process and help you recover, restore, fix, disassemble and repair LG WD1412RT / WD1412RT5 / WD1412RT7 / WD1412RTA / WD1412RTA5 / WD1412RTA7 Washing Machine. Information contained in service manuals typically includes schematics / circuit diagrams, wiring diagrams, block diagrams, printed wiring boards, exploded views, parts list, disassembly / assembly, pcb.

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