WM-128NW - LG Washing Machine Service Manual (repair manual)

Model
WM-128NW
Pages
59
Size
10.87 MB
Type
PDF
Document
Service Manual
Brand
Device
Washing Machine
File
wm-128nw.pdf
Date

View LG WM-128NW Service Manual online

WAS HING  MAC HINE
S E R V IC E   MA NUA L
MODE L   :   F 1481T D*  /  F 1281T D*  /  F 1081T D*
2
CONTENTS
1. SPECIFICATIONS ............................................................................................................................. 3
2. FEATURES & TECHNICAL EXPLANATION ..................................................................................... 4
3. PARTS IDENTIFICATION  ................................................................................................................. 6
4. INSTALLATION .................................................................................................................................. 7
5. OPERATION ................................................................................................................................... 13
6. WIRING DIAGRAM / PCB LAYOUT ................................................................................................ 15
7. TROUBLESHOOTING ......................................................................................................................19
7-1.BEFORE PERFORMING SERVICE ......................................................................................... 19
7-2.LOAD TEST MODE .................................................................................................................. 19
7-3.HOW TO CHECK THE WATER LEVEL FREQUENCY ............................................................ 20
7-4.HOW TO CHECK THE TEMPERATURE OF EACH THERMISTOR AT OPERATING CONDITION ...... 20
7-5.ERROR DISPLAY ..................................................................................................................... 21
7-6.TROUBLESHOOTING WITH ERROR ..................................................................................... 23
• IE (Water Inlet Error)  .............................................................................................................. 23
• UE (Unbalanced Error) ........................................................................................................... 24
• OE (Water Outlet Error) .......................................................................................................... 25
• FE (Over Flow  Error)  ............................................................................................................. 27
• PE (Pressure Sensor S/W Error) ............................................................................................ 28
• dE (Door open Error) .............................................................................................................. 29
• tE (Thermistor (Heating) Error) ............................................................................................... 30
• LE (Motor Lock Error) ............................................................................................................. 31
• AE (Water leakage)  ................................................................................................................ 33
8. TROUBLESHOOTING OTHER ...................................................................................................... 34
• No power  ................................................................................................................................ 34
• Vibration & Noise during spin  ................................................................................................. 35
• Detergent & Softener does not flow in .................................................................................... 36
• Water Leak  ............................................................................................................................. 37
9. PART INSPECTION ........................................................................................................................ 39
9-1.FILTER ASSEMBLY (LINE FILTER) ......................................................................................... 39
9-2.DOOR LOCK SWITCH ASSEMBLY ......................................................................................... 40
9-3.STATOR ASSEMBLY  ............................................................................................................... 42
9-4.PUMP MOTOR ASSEMBLY ....................................................................................................... 45
9-5.INLET VALVE ASSEMBLY  ....................................................................................................... 46
9-6.THERMISTOR ASSEMBLY ...................................................................................................... 47
10. DISASSEMBLY INSTRUCTIONS .................................................................................................. 48
11. EXPLODED VIEW AND PART LIST .............................................................................................. 56
3
1. S P E C IF IC AT ION
IT E M
F 1481T D*  /  F 1281*  /  F 1081T D*
P OWE R  S UP P LY
P R ODUC T  WE IG HT
OP E R AT ION WAT E R  P R E S S UR E
C ONT R OL T Y P E  
WAS H C APAC IT Y
DIME NS ION
WAS H P R OG R AM
R INS E
DOOR  S WIT C H T Y P E  
WAT E R  LE V E L
R E S E R VAT ION
S E NS ING  LAUNDR Y  AMOUNT  
F UZZY  LOG IC  
DIS P LAY  R E MAINING  T IME
E R R OR  DIAG NOS IS  
P OWE R  AUTO OF F  
C HILD LOC K
AUTO R E S TAR T
T IME  S AV E
E LE C T R IC IT Y
C ONS UMP T ION
WAS HING
WAS H HE AT E R
DR AIN MOTOR
S P IN
R E V OLUT ION
S P E E D
WAS H
S P IN
F 1481TD*
F 1281TD*
F 1081TD*
No S pin / 400 / 800 / 900 / 1000
No S pin / 400 / 800 / 1000 / 1200
No S pin / 400 / 800 / 1000 / 1400
50 rpm
1.0 ~ 10.0 kgf / cm
2
(100 ~ 1000 kP a) 
E lectronic
R efer to the R ating Label
600 mm (W) x 590 mm (D) x 850 mm (H)
C otton, C otton E co, Mix, E asy C are, Duvet, B aby C are, 
S kin C are, S ports Wear, Dark Wash, Delicate, Wool, 
Intensive 60, Quick 30, S ilent Wash
Normal, R inse+, R inse++, R inse++Hold, Normal+Hold
P TC +S olenoid
10 steps (by sensor)
F rom 3 hours to 19 hours
Adapted
Adapted
Adapted
10 items
Adapted
Adapted
Adapted
Adapted
140 W
2000 W
30 W
440 W 
220 - 240 V  ~, 50 Hz
65 kg
To reduce the risk of personal injury, adhere to all industry recommended safety procedures including
the use of long sleeved gloves and safety glasses. 
F ailure to follow all of the safety warnings in this manual could result in property damage, personal
injury or death
4
2. FEATURES & TECHNICAL EXPLANATION
2-1. FEATURES
Direct Drive System
The advanced Brushless DC motor directly drives the drum without belt and pulley.
Water Circulation
The detergent water from the drum is sprayed directly over the load ; 
this enables the clothes to get soaked more quickly during the cycle.  
The detergent suds can be removed more easily by the water shower during rinse cycle.
The water circulation system uses both water and detergent more efficiently.
Built-in Heater
Child Lock
The Child lock prevents children from pressing any Buttons to change the settings during
operation.
More economical by Intelligent Wash System
Intelligent Wash System detects the amount of load and water temperature, and then
determines the optimum water level and washing time to minimize energy and water
consumption.
Low noise speed control system
By sensing the amount of load and balance, it evenly distributes load to minimize the
spinning noise level.
Safety device (Aqua lock) 
Aqua lock System is designed for detecting water leakage during operation to prevent
water from spilling on the floor.  
5
2-2. DETERMINE WASHING TIME BY FUZZY LOGIC
To get the best washing performance optimal time is determined by sensing the water
temperature, selected washing temperature and laundry amount.
2-3. WATER LEVEL CONTROL
This model adopts a pressure sensor which can sense the water level in the tub.
Water supply is stopped when the water level reach the preset level, then washing program proceeds.
Spinning does not proceed until the water in the tub reduces to a certain level.
water
temperature
washing time
rinse time
the best
washing
performance
spin rhythm, time
laundry
amount
FUZZY
LOGIC
selected
washing
temperature
SENSING
EFFECT
PROCESSING
DETERMINATION
2-4. THE DOOR CAN NOT BE OPENED
While program is operating.
While Door Lock light is on.
6
3. PARTS IDENTIFICATION
Drawer
Drum
Door
Drain Hose
Adjustable Feet 
Shipping Bolts
Control Panel
Power plug
Drain Pump Filter
Drain Plug
Lower Cover Cap
If the supply cord is damaged,
it must be replaced by the
manufacturer or its authorized
service technician in order to
avoid a hazard.
ACCESSORIES 
Inlet hose(1EA)         Option : Hot / Cold(2EA)
Spanner
7
4. INSTALLATION
INSTALLATION
The appliance should be installed as follows.
Check the conditions of installation area.
1. Check level ground.
On raised foundations or upper level homes, the 
vibrations
can be caused by the type of flooring. 
It may be 
necessary to move
the 
machine
to a different area in the home or have the floor
reinforced to properly support the operation of the unit.
2. Check for humidity or any foreign objects under the feet.
Clean the floor, there should be no foreign objects under the feet.
If the unit has foreign objects underneath the feet, this will prevent the unit from being leveled properly 
and will cause 
vibrations
and 
slipping
.
Remove any foreign objects
, if any from underneath the machine and level unit properly.
See below for examples of foreign objects.
1
Open the box and check appliance condition.
2
horizontal
Carpet
Paper
Laminated
paper
Purchased
stopper
Base Packing
Washer
Spanner
1. Remove the cardboard box and styrofoam packing.
2. Lift the washing machine and remove the base packing.
3. Remove the tape securing the power supply cord and
drain hose.
4. Remove the inlet hose from the drum.
Keep the spanner provided for future use.
8
Use spanner to remove transit bolts.
3
Check the distance between the appliance and the wall.
4
The tap connection and hose connection must be parallel.
5
More than 2cm
If the distance is less than 2cm,
the water supply hose will 
kink
or 
fold
1. Unscrew the adapter ring plate and the 4 adapter retaining screws.
2. Push the adapter onto the end of the tap so that the rubber seal forms
a watertight connection. Tighten the adapter ring plate and the 4
screws.
3. Push the water supply hose vertically upwards so that the rubber
packing within in the hose can adhere completely to the tap and then
tighten it by screwing it to the right.
• Water supply pressure must be between 100 kPa and 1000 kPa (1.0 ~ 10.0 kgf / cm
2
)
• Do not strip or crossthread when connecting Inlet hose to the valve.
• If the water supply pressure is more than 1000 kPa, a decompression device should be installed.
• Periodically check the condition of the hose and replace the hose if necessary.
Type-A : Connecting Screw-type hose to tap with thread
• Screw the hose connector onto water supply tap.
Connecting water supply hose
Step1 : Check rubber seal inlet hose
Step2 : Connect hose to water tap
• Two rubber seals are supplied with the water inlet hoses. 
They are used for preventing water leaks. Make sure the connection to
taps are sufficiently tight.
Upper
connector
Rubber
packing
Plate
Water supply
hose
Fixing screw
Hose
connector
Rubber
seal
Type-B : Connecting Screw-type hose to tap without thread
Transit bolt
1. Unscrew the 4 bolts with the spanner supplied.
2. Take out the 4 bolts along with the rubber bungs by slightly twisting the bung. 
3. Close the holes with the caps supplied.
Keep the transit bolts for future use. 
9
Please use the horizontal tap
Horizontal tap
Extension tap
Square tap
1. Unscrew the adapter ring plate and the 4 adapter retaining
screws.
2. Remove the guide plate if the tap is too large to fit the
adapter.
3. Push the adapter onto the end of the tap so that the rubber
seal forms a watertight connection. 
Tighten the adapter ring plate and the 4 screws.
4. Pull the connector latch plate down, push the inlet hose onto
the adapter, and release the connector latch plate. 
Make sure the adapter locks into place.
After completing connection, if water leaks from the hose, repeat the same steps. 
Use the most conventional type of faucet for water supply. In case the faucet is square or too big, remove the
spacing ring before inserting the faucet into the adaptor.
Ring plate
Guide plate
Latch plate
Type-C : Connecting one touch type hose to tap without thread
Step3: Connect hose to washer
• Make sure that there are no kinks in the hose and that they are not
crushed.
When your washer has two valves.
• The Inlet hose With the red connector is for the hot water tap.
• If the washer has two valves, energy is saved by  using the hot valve.
After connecting inlet hose to water tap, turn on the
water taps to flush out foreign substances (dirt, sand or
sawdust) in the water lines. Let water drain into a
bucket, and check the water temperature.
10
Connect Drain Hose.
6
Connect power plug.
7
If the drain hose is not installed properly, the unit will not drain properly.
This allows water to back flow into the unit which can cause odors.
Refer to Owner Manual for proper drain hose installation.
The odor could also be coming from the home’s drain to which the drain hose is attached.
In this type of drain hose installation, the odor could be coming from the standpipe.
This odor can come up the drain hose and into the unit.
Pour a cup or two of bleach or vinegar down the home drain 
and let it sit for 24 hours before running another cycle.
This will help eliminate odor from the home drain. 
If a cycle is started too soon after doing this, it will not help the issue.
Connect the power plug to the wall outlet.
Avoid connecting several electric devices, 
it may be the cause of a fire.
about 100 cm
about 145 cm
about 105 cm
Laundry tub
Max. 100cm
min. 60cm
Max. 100cm
min. 60cm
Retainer
Tie
strap
Hose
min. 60 cm
max. 100 cm

Download LG WM-128NW Service Manual (Repair Manual)

Here you can view online and download LG WM-128NW Service Manual in PDF. WM-128NW service manual will guide through the process and help you recover, restore, fix, disassemble and repair LG WM-128NW 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.