LG WM3070HVA Service Manual ▷ View online
18
5-4. Explanation of each process
No.
Process
Explanation
1.
Stay
• Electrical power is supplied.
• Washer is ready to work and the micom is in the active mode.
• Washer is ready to work and the micom is in the active mode.
2.
Water
supply
supply
• After loading laundry and selecting a course and a cycle, water is
supplied and drum rotates.
• When a user selects Pre-wash course, water is supplied through pre
wash valve.
3.
Soaking
and washing
laundry
and washing
laundry
• To get laundry wet, drum rotates clockwise and counterclockwise.
• If water amount is insufficient at this time, the Inlet valve will supply
• If water amount is insufficient at this time, the Inlet valve will supply
water again.
4.
Heating and
washing
washing
• The heater heats the water in drum to the selected water temperature
and drum rotates for washing.
5.
6.
Washing
and heating
/ washing
and heating
/ washing
• When the water temperature reaches to the selected temperature,
the heating stops and only the drum rotates.
• If water temperature becomes lower than selected because of
re-supplied water, the heating starts again.
7.
Washing
• Fuzzy logic decides washing time according to the laundry load, water
temperature, and other factors.
8.
Drainage
• A pump motor drains the water from the drum.
• After sensing drained water amount by water level frequency, spin starts.
• When a heating course is selected, stay cooling process is performed to
• After sensing drained water amount by water level frequency, spin starts.
• When a heating course is selected, stay cooling process is performed to
decrease the water temperature gradually to prevent laundry from being
damaged and for safety reasons.
damaged and for safety reasons.
9.
Untangling
(Sensing
eccent-
ricity)
(Sensing
eccent-
ricity)
• It balances laundry load and senses the eccentricity of the load, to only
allow spinning without vibration.
• If the eccentricity is worse than the allowed level, it repeats the
disentangling process. When the repeated time is more than allowed
level, it displays UE.
level, it displays UE.
• If the eccentricity is good, the intermittent spin starts.
• During this process, the drain pump works for drainage intermittently.
• During this process, the drain pump works for drainage intermittently.
19
No.
Process
Explanation
A.
Intermittent
spin
spin
• To reach the correct set speed, the motor rotates clockwise and
counterclockwise directions after spin process starts.
• If the water level frequency is lower than 23.0 kHz,
a washer senses suds and starts suds removal process.
B.
Rinse
spin
spin
• In this process, the remaining water during washing process is
extracted and the selected speed is kept.
• Removing suds process is in active mode at this cycle.
C.
Remaining
spin
spin
• After spin finishes, the drum rotates by remaining spin power until it
stops. Motor power is off.
• This process is overlapped with next process.
D.
Rinse water
supply
supply
• Water supply for rinse process.
E.
Rinse
• Rinsing process.
F.
Last
drainage
drainage
• After spin finishes and power is not supplied to motor, the drum
rotates by remaining spin power.
• If rinse hold is selected, the drainage is not proceeded after rinse
finishes.
G.
Disentangling
• The same as item 9.
H.
Intermittent spin • The same as item A.
I.
Main spin1
• The same as item B.
J.
Main spin2
• At the end of a main spin, the spin speed will reach the selected rpm.
K.
Remaining spin • The same with item C.
L.
Disentangling
• After spin finishes, disentangling starts to remove unbalanced
laundry.
M.
End
• After ‘end’ signal is displayed, it stays for 8 seconds and power is
automatically turned off. (Auto type door switch)
• After door switch is off, end signal is displayed in the case of
manual type and it takes around 2 minute to turn off door switch.
20
6. WIRING DIAGRAM / PROGRAM CHART
1
2
3
1
2
3
4
4
W
ASH
1
2
2
1
2
2
INLET
VAL
VAL
VE
WH
1
2
3
4
5
6
1
2
3
1
2
3
1
2
3
4
1
2
3
4
1
2
3
4
2
1
2
1
2
1
2
1
5
6
1
2
3
4
5
6
1
2
3
4
5
6
1
2
3
4
1
2
3
4
3
2
1
3
2
1
1
2
3
1
2
3
4
4
MOT
OR
OR
PRESSURE
SENSOR
THERMIST
OR
POWER
CORD
+HOUSING
1
2
2
1
U
V
V
W
2
3
3
3
1
2
2
12
3
3
4
3
3
43
2
2
1
1
1
2
2
12
3
3
5
4
4
54
3
3
2
2
2
1
1
1
a
H
b
H
D
N
G
1
2
2
1
2
2
1
2
2
1
2
2
/
NOISE
FIL
TER
1
2
3
1
2
3
3
2
1
3
2
1
DOOR LOCK
4
SOLE
NOID
32
1
234
5
/
E
S
U
F
E
S
U
F
21
7. TEST MODE
7-1. SAFETY CAUTION
Both 120 volts AC and DC voltages are present on the main board. Be careful to avoid a shock hazard.
Be careful electric shock when disconnecting parts while trouble shooting. (Wear Electro Static
Discharge gloves when working.)
Be careful electric shock when disconnecting parts while trouble shooting. (Wear Electro Static
Discharge gloves when working.)
After cutting off the power when changing PWB assembly, disconnect or assemble.
Be careful static when handling PWB assembly, and use electro static discharge plastic pack
when handling or storing the board or other components.
when handling or storing the board or other components.
7-2. LOAD TEST MODE
1. Press the SPIN SPEED and SOIL LEVEL buttons simultaneously.
2. Press the Power button, while the above condition. Then buzzer will sound twice.
4. Press the START/PAUSE
button repeatedly to cycle through the test modes.
None
1 time
2 times
3 times
4 times
5 times
6 times
7 times
8 times
9 times
10 times
11 times
12 times
13 times
14 times
15 times
Turns on all lamps.
Tumble clockwise.
Low speed Spin.
High speed Spin.
Inlet valve for prewash turns on.
Inlet valve for main wash turns on.
Inlet valve for Hot water turns on.
Inlet valve for bleach turns on.
Inlet valve for steam turns on.
Tumble counterclockwise.
Heater turns on for 3 seconds.
Circulation pump turns on.
Drain pump turns on.
Steam water level sensor operates.
Steam Heater turns on for 1.2 sec.
off
LOAD TEST MODE
rpm (42~50)
rpm (35~45)
rpm (110~117)
Water level frequency (0~255)
Water level frequency (0~255)
Water level frequency (0~255)
Water level frequency (0~255)
Water level frequency (0~255)
rpm (42~50)
Water temperature
Water level frequency (0~255)
Water level frequency (0~255)
AG tub water level frequency (0~255)
Steam generator temperature
3. Press the STEAM button to load test mode. Without pressing the STEAM button, you
can load demo mode.
Number of times the
Start/Pause button is pressed
Check Point
Display Status
The washer must be empty and the controls must be in the off state.
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