LG WM1377HW Series User manual

WASHINGMACHINE
SERVICE MANUAL
READ THIS MANUAL CAREFULLY TO DIAGNOSE TROUBLES
CORRECTLY BEFORE OFFERING SERVICE.
MODEL : WM1377HW
CAUTION

P/No.: MFL62645352

CONTENTS
1. SPECIFICATION............................................................................................................................3
2. FEATURES & TECHNICAL EXPLANATION ................................................................................ 4
3. PARTS IDENTIFICATION ............................................................................................................ 6
4. INSTALLATION ............................................................................................................................. 7
5. OPERATION ................................................................................................................................10
6. WIRING DIAGRAM / PCB LAYOUT / PROGRAM CHART.........................................................12
7. TROUBLE SHOOTING................................................................................................................14
7-1.BEFORE SVC CHECKING ..................................................................................................14
7-2.QC TEST MODE..................................................................................................................14
7-3.HOW TO KNOW THE WATER LEVEL FREQUENCY.........................................................14
7-4.
HOW TO KNOW TO TEMPERATURE OF EACH THERMISTOR AT OPERATING CONDITION ......14
7-5.ERROR DISPLAY................................................................................................................15
8. ERROR DIAGNOSIS AND CHECK LIST ....................................................................................17
8-1. DIAGNOSIS AND ANSWER FOR ABNORMAL OPERATION ...........................................17
8-2. FAULT DIAGNOSIS AND TROUBLE SHOOTING .............................................................20
9. DISASSEMBLY INSTRUCTIONS ...............................................................................................26
10. EXPLODED VIEW AND PARTS LIST .......................................................................................34
10-1. THE EXPLODED VIEW OF CABINET ASSEMBLY .........................................................34
10-2. THE EXPLODED VIEW OF CONTROL PANEL AND DISPENSER ASSEMBLY ............35
10-3. THE EXPLODED VIEW OF DRUM AND TUB ASSEMBLY .............................................36
2

1. SPECIFICATION
ITEM
PO WER SUPPLY 120 V~, 60 Hz
PRODUCT WEIGHT 67 kg
WASHING 134 W
SPIN 455 W
DRAIN MOTOR 80 W
WASH HEATER 1000 W
WASH 50 rpm
SPIN No Spin/400/600/800/1000/1200/1400
OPERATION WATER PRESSURE 1.0 - 9.8 kgf/cm2 (100 - 980 kPa)
CONTROL TYPE Electronic
WASH CAPACITY Refer to the Rating Label
DIMENSION
600 mm(W)x640 mm(D)x850 mm(H)
WASH PROGRAM
Sanitary, Bulky/Large, Cotton/Normal , Perm. Press, Baby Wear,
Delicates, Hand Wash/Wool, Speed wash, Drain+spin
RINSE Rinse+Spin, Extra Rinse
WATER LEVEL : 0 ~ 255 (by sensor)
DOOR SWITCH TYPE Bi-Metal type
WATER LEVEL
RESERVATION From 1 hours to 19 hours
SENSING OF THE LAUNDRY AMOUNT Adapted
FUZZY LOGIC Adapted
DISPLAY OF THE REMAINING TIME Adapted
ERROR DIAGNOSIS 10 items
POWER AUTO OFF Adapted
CHILD LOCK Adapted
AUTO RESTART Adapted
TIME SAVE Adapted
ELECTRICITY
CONSUMPTION
REVOLUTION
SPEED
WM1377HW
3

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
Spray detergent solution and water over the load over continu.
Clothes are soaked more quickly and thoroughly during wash 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
Internal heater automatically heats the water to the best temperature on selected
cycles.
Child Lock
The Child lock prevents children from pressing any button 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.
Automatic Wash Load Detection
Automatically detects the load and optimizes the washing time.
추가선택,예약,
4

2-2.DETERMINE WASHING TIME BY FUZZY LOGIC
To get the best washing performance optimal time is determined by sensing of 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 to the preset level, then washing program proceeds.
●Spinning does not proceed until the water in the tub reduces to a certain level.
2-4.THE DOOR CAN NOT BE OPENED
While program is operating.
While Door Locklight turns on.
FUZZY
LOGIC
laundry
amount
selected
washing
temperature
water
temperature
washing time
rinsing time
spin rhythm, time
the best
washing
performance
SENSING PROCESSING DETERMINATION EFFECT
5

3. PARTS IDENTIFICATION
(For detergent and
fabric softener)
Drawer
Drain hose
Transit bolts Power plug
Control panel
Drain pump filter
Lower cover cap
•If the supply cord is damaged,
it must be replaced by the
manufacturer or its service agents
or a similarly qualified person in
order to avoid a hazard.
Drum
Door Drain plug
Adjustable feet
Included Accessories
Hot and Cold
Water Hoses
Wrench
(for removing shipping
bolts and adjusting
leveling feet)
Tie Strap
(for securing
drain hose)
Elbow Bracket
(for securing drain
hose)
Non-skid pads
or
6

Before servicing ask the customer what the trouble is.
Check the adjustment(power supply is 120 V, remove the transit bolts....)
Check the troubles referring tothe trouble shooting.
Decide service steps referring to disassembly instructions.
And then, service and repair.
After servicing, operate the appliance to see whether it works O·Kor NOT.
■STANDARD INSTALLATION
The appliance should be installed as follows.
REMOVE THE
TRANSIT BOLTS
INSTALL THE APPLIANCE
ON FLAT AND FIRM SURFACE
ADJUST THE
HORIZONTAL
Remove the transit bolts Turn the leveling feet to
(4EA:①.yllatnozirohecnailppaehttes.rennapsdeilppushtiw)
Keep the transit bolts and
spanner for future use.
Insert the provided 4 caps
into the hole
The appliance goes up by
rotating the feet clockwise.
The appliance come down by
rotating the feet counter
clockwise.
4. INSTALLATION
1
2
7

■HOW TO CONNECT INLET HOSE
Check that the rubber packing is inside of the
valve connector.
Connect the inlet hose firmly to prevent leak.
■CONNECT DRAIN HOSE
■CONNECT POWER PLUG
·Make sure that the hose is not twisted.
※The drain hose should be placed under 100cm from the floor.
·Connect the power plug to the wall outlet.·Avoid connecting several electric devices,
It may be the cause of a fire.
·Avoid submerging the end of the hose.
8

TEST OPERATION
Connect the power plug to
the outlet.In case of Coloreds program.
Connect the inlet hose.
Preparation Press the POWER button.Press the Start/Pause
.nottubrof
washing.
·Check if the drum rotates ·Check if water is supplied
clockwise and counterclockwise. through the detergent dispenser.
·Power off and then power on.
·Check if the door can be
opened after 3 minutes.
·Turn off Wash and Rinse after
pressing the Start/Pause button
and start the machine again.
·Check drain and spin.
·Press the Rinse+Medic Rinse
button simultaneously and the
present temperature will be
displayed.
·If SVC is needed during
check, remove
the remainingwater by pulling
out the hose cap.
Check the water heating.Check automatic reverse Check the water supply.
turn.
Check drain and spin
Power off and open the Water removal
door
9

5. OPERATION
Cycle Selector
•Rotate the Cycle selector
knob to select the cycle
designed for different
types of fabric and soil
levels.
Start/Pause
•Use this button to Start/
Stop the washer.
•
Power
Use this button to turn the
power On/Off.
•
•
Additional Programs
Time Delay : Allows the start of any cycle to be delayed for 1~19 hours.
Favorite : Favorite program allows you to store a customized operation
for next use.
Water Plus : Select this option to add extra water to the wash and rinse
cycles for superior results, especially with large or bulky items.
Beep on/off
•
•
•
•
10

•
•
•
LED display
Display the estimated remaining time
(Hour : minute) to finish.
In case of abnormal operation.
error indications are displayed
(IE, OE, UE, dE, tE, FE, PE, LE, PF)
See troubleshooting guide.
Option buttons
•The option buttons allow you to
select additional cycle options and
will light when selected. Certain
buttons also allows you to activate
special function by processing and
holding the button for 3 seconds.
•
Cycle setting buttons
Use these buttons to select the desired
cycle options for the selected cycle.
Press the button for that setting until
the indicator light for the desired
value is it.
•
•
Spin Selector knob
To change the spin speed. turn the
spin knob to cycle through available
options.
•
11

PCB Layout (Main)
LED Display
Heater
Display Power
Thermistor
PCB POWER
Door S/W
&
Drain Pump
Door
S/W
Drain
Pump
(152~170Ω)
Common
Pressure
S/W
Pressure Switch
&
MeasureHzimpossible
Here. Just Check cut-off
Circulation Pump
Circulation
Pump
(152~170Ω)
Hall Sensor Control
Common
Ha
(5~15kohm)
Ha
(5~15kohm)
Inlet Valve Control
Main Valve
3.5~4.5kΩ
Pre Valve
3.5~4.5kΩ
Motor Stator Control
V~U
/U~W
/W~V
⇒R:8~11Ω
W
U
V
12

6. WIRING DIAGRAM / PROGRAM CHART
Drain
I
S
Heat
Wet
Wash
Drain
I
S
Drain
I
S
Drain
I
S
Drain
I
S
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29
120 480 60 180 120 (‘’-) 60 180 120 180 60 180 120 180 60 180 120 180 60 180 120 180 60 480 120 30 90
88
26
8
8
12
12
1120 2
8
15
**Approx
Working
Time
(Minute)
E
N
D
A
U
T
O
O
F
F
1:02
1:47
1:02
57
58
2:03
47
15
1:47
Rinse
Spin
Drain
Spin
D
T
Extra &
Stain(4~6)
W
S
Rinse
3
W
S
Rinse
2
W
S
Rinse
Wash
1
W
S
Rinse
Wash
Pre Main
W
S
Wash
W
S
Rinse+Spin
Cotton
Sanitary
Bulky Large
Hand Wash
/Wool
Perm Press
Speed
Wash
Baby Wear
Drain
+ Spin
Delicate
42
4
2
8
2
2
4
4
4
4
2
4
4
2
(‘’-)
13

7. TROUBLE SHOOTING
7-1.BEFORE SVC CHECKING
■Be careful of electric shock or disconnecting the parts while trouble shooting.
■Voltage of each terminal in 113-127 V~ and DC while applying an electric current.
7-2.QCTEST MODE.
①Pressing Option (Left) and Soil Level button simultaneously.
②Press the Power button, while the above condition.
③Press the Start/Pause button as follows.
Number of times the
Start/Pause button is pressed
7-4.HOW TO KNOW THE WATER LEVEL FREQUENCY
Press the Water Plus and Option(Left) button simultaneously.
ex) 241 : Water level frequency = 241×10 kHz
-1
= 24.1 kHz
The digits means water level frequency (10-1 kHz)
sutatSyalpsiDtnioPkcehC
None Turns on all lamps and locks the door.
1time Tumble clockwise. rpm (42~50)
)56~55(mpr.nipSdeepswoLsemit2
137)(mpr.nipSdeepshgiHsemit3
4times Inlet valve for prewash turns on. Water level frequency (229~255)
5times Inlet valve for main wash turns on. Water level frequency (229~255)
6times Inlet valve for hot water turns on. Water level frequency (229~255)
7times Tumble counterclockwise. rpm (42~50)
8times
Heater turns on for 3 sec. Water temperature
9times Circulation pump turns on. Water level frequency (0 ~ 255)
10 times
Drain pump turns on. Water level frequency (0 ~ 255)
-ffOsemit11
14

7-5.ERROR DISPLAY.
If you press the Start/Pause button in error condition, any error except ‘ ’ will disappear and the
machine will change into pause status.
In case ofd e ,d e , if the error is not resolved within 20 sec., and in case of other errors,
if the error is not resolved within 4 min., power will be turned off automatically and the error only will be
blinked. But in case ofd e , power will not be turned off.
ESUACMOTPMYSRORRE
1
2
3
4
5
6
7
•Not reached to the water level 0.2khz within
4 minutes, not reached to water level 24.8 khz
within 10 minutes, or not reachd to the preset
water level within 25 minutes
•Not fully drained within 10 minutes.
•Water is over flowing(less 213).
※If “ ” is displayed, drain pump operates to
drain water automatically.
•The sensor pressure switch is out of order.
•In case of operating the reservation function or
the other function with door opened. Close the
door, then the error display is resolved.
•The door switch is out of order.
•The appliance is tilted.
•Laundry is gatherd to one side.
•The THERMISTOR is out of order.
WATER INLET
ERROR
DRAIN ERROR
OVERFLOW
ERROR
SENSOR PRESSURE
S/W ERROR
DOOR OPEN
ERROR
IMBALANCE
ERROR
HEATING
ERROR
15

ESUACMOTPMYSRORRE
8
9
10
•The connector in the LEAD WIRE ASSEMBLY is not connected to
the connnector of STATOR ASSEMBLY
Reconnect or repair the connector
•The hall sensor is out of order/defective.
Replace the STATOR ASSEMBLY
•Water leaks
•The washer ecperienced a power failure
LOCKED
MOTOR
ERROR
POWER
FAILURE
16

8-1.DIAGNOSIS AND ANSWER FOR ABNORMAL OPERATION
8. ERROR DIAGNOSIS AND CHECK LIST
NO POWER
WATER INLET TROUBLE
Is the power plug connected firmly to
120V~ outlet?
Power failure? or Breaker opened?
Visit to check
Is " " displayed?
Is the tap opened?
Is the tap frozen?
Is the water supply shut-off?
Is filter in the inlet valve clogged with
foreign material?
Visit to check
Clean the filter of
inlet valve
Symptom Guide for Service Call
17

SYMPTOM
• DOOR DOES NOT
OPEN
• ERROR DISPLAYED
ON THE PROGRAM
• DRAIN TROUBLE
• POWER FAILURE
GUIDE FOR SERVICE CALL
NO
YES
NO
YES
Started with door opened?
NO
YES
Is the debris filter clogged with foreign
material such as pin, coin and etc.?
Is the drain hose frozen with water,
kinked or crushed?
Visit to check
Restart the cycle
Close the door
Visit to check
Check if the door switch is O K.
Is " " displayed?
Clean up
the filter.
.
18

SYMPTOM GUIDE FORSERVICE CALL
∙Suds overflow from the
appliance.
(In this condition, wash and
spin do not operate
normally)
∙No effect of softener
YES
YES
YES
YES
YES
Is low-sudsing detergent for the drum
washing machine used?
Is the proper amount of detergent used
as recommended?
Recommend to reduce the using amount
of detergent.
Is softener put in the correct compartment of
the drawer?
Is the drawer closed during wash?
Is the softener cap clogged?
Explain how to use softener
< Clean the compartment for softener >
Visit to check
LOW-SUDSING
This appliance has the automatic suds sensing function which
operates under much suds condition for good rinse and
preventing overflow.
When much suds are sensed, suds removing function such as
drain, water input and pause will operate without rotating the
drum.
19