DOWNLOAD LG WD-90MFD Service Manual ↓ Size: 6.32 MB | Pages: 45 in PDF or view online for FREE

Model
WD-90MFD
Pages
45
Size
6.32 MB
Type
PDF
Document
Service Manual
Brand
Device
Washing Machine
File
wd-90mfd.pdf
Date

LG WD-90MFD Service Manual ▷ View online

16
6. WIRING DIAGRAM
PROGRAM CHART
* Water Supply : W·S        * Intermittent Spin : I·S        * Disentangle : D·T
*                       Basic Cycle
*                       Optional Cycle                          
* Pre-Setting Time : Water Supply - 120 sec.                                                        * Basic time is minute in washing chart
Drain          - 60 sec.                                                      
* The actual program time can be varied with the load amount,
* ~ Time for varies as the temperature or the amount of laundry
                           water temperature or ambient temperature
Washing
Rinse
Spin
W
·
S
Pre
Main
Washing
Drain
I
·
S
W
·
S
Rinsing
Washing
Staycooling
Heating
Washing
Drain
W
·
S
1
2
3
7
6
5
4
9
8
10
Normal
Drain
I
·
S
11
12
1
W
·
S
Rinsing
13
14
Drain
I
·
S
15
16
2
W
·
S
Rinsing
17
18
Drain
I
·
S
19
20
W
·
S
Rinsing
21
22
Drain
I
·
S
23
24
W
·
S
Rinsing
25
26
Rinse +
Drain
Spin

T
A
U
T
O
O
F
F
3
4
27
28
29
30
E
N
D
31
Cotton
(BIG)
Normal
Working
Time
(Hour:Minute)
(With Intensive)
About 2:47
120 MIN 60
MIN
120
240
60
120
60
60 240 120 360 60 240 120 360 60 240 120 360 60 240 120 360 60 480 120 20
20
C
Y
C
L
E
S
T
E
P
C
O
U
R
S
E
Time
(SEC)
8
44
~
87
Synthetic
Delicate
Wool/Silk
About 1:03
About  1:01
About 1:39
4
18
Drain
About    1
Rinsing
+ Spin
About    24
4
18
26
~
51
Handwash
About    55
4
24
Quick
About    40
Cotton
(Small)
About 2:04
8
42
~
44
17
7. TROUBLE SHOOTING
7-1.BEFORE PERFORMING SERVICE
■ Be careful of electric shock or disconnecting the parts while troubleshooting.
■ Voltage of each terminal in 220-240V~ and DC while applying an electric current.
7-2.QC TEST MODE.
① Press Intensive and Rinse Hold button simultaneously.
② Power supply on with pressing upper two buttons.Then buzzer sound twice.
③ Press the Start/Pause button as follows.
[Press the Start/Pause button more 4 times until stop spinning]
7-3.HOW TO KNOW THE WATER LEVEL FREQUENCY
✽ Press the Rinse Hold button.
ex) 241 : Water level frequency = 241× 10-1㎑
=24.1㎑
7-4.HOW TO KNOW TO TEMPERATURE OF EACH THERMISTOR
AT OPERATING CONDITION.
■ Thermistor in tub : Press the [TIME DELAY] and [RINSE HOLD] button.
■ Thermistor in dry duct : Press the [DRY] button.
The digits means water level frequency (10
-1 
Pressing number of
[Start/Pause]button
Checking Point
Display Status
None
All lamps turn on
1 time
Counterclockwise spin (left)
Drum rpm (About 40~52)
2 times
Low speed Spin
Drum rpm (About 55~70)
3 times
High speed Spin
Drum rpm (About 130~143)
4 times
Inlet valve for prewash operation
Water level frequency (25~65)
5 times
Inlet valve for mainwash operation
Water level frequency (25~65)
6 times
Hot inlet valve in case of hot water fill
7 times
Inlet valve for Dry operation 
Water level frequency (25~65)
8 times
Clockwise spin (right)
Drum rpm (About 40~52)
9 times
Wash Heater is in operation for 3 sec.
Water temperature
10 times
Dry Heater & Dry fan operation
11 times
Dry fan & motor turns on 
12 times
Auto off operation
18
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 of 『
』, 『
』, 『
』, 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 of 『 』
, power will not be turned off.
ERROR
SYMPTOM CAUSE
1
2
3
4
5
6
7
• Not reached to the water level(2 level)within 4
minutes after water supplied or not reached to
the preset water level within 25 minutes.
• Not fully drained within 5 minutes.
• Water is over flowing(over 8 level).
※ 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
ERROR
SYMPTOM CAUSE
8
9
10
• MAIN PWB ASSEMBLY is out of order
☞ Replace the MAIN PWB ASSEMBLY
• Winding in the STATOR ASSEMBLY is short-circuited.
☞ Replace the STATOR ASSEMBLY
• “      ” is displayed during a high spin 
☞ Replace the LEAD WIRE ASSEMBLY (MOTOR)
• 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
• The Dry Heater is out of order
☞ Replace the Dry Heater
• The Connector of the Dry Heater is not connected properly to the
connector in the Main PWB ASSEMBLY
☞ Reconnect or repair the connector
• The Dry fan motor is out of order
☞ Replace the fan Motor.
CURRENT
ERROR
MOTOR
ERROR
DRY
HEATOR
ERROR
19
• The washer experienced a power failure.
11
POWER
FAILURE
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