LG WDN1753BS Service Manual ▷ View online
There’s built-in AC 120V and DC power in output terminal of PWB assembly in common. 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
delivering or keeping it.
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
delivering or keeping it.
20
8. TROUBLESHOOTING
8-1. SAFETY CAUTION
8-2.ERROR MODE SUMMERY
ERROR
SYMPTOM
CAUSE
WATER INLET
ERROR
1
IMBALANCE
ERROR
2
DRAIN
ERROR
3
OVER FLOW
ERROR
4
PRESSURE
SENEOR
ERROR
5
DOOR OPEN
ERROR
6
HEATING
ERROR
7
• Correct water level (246) is not reached within 8 minutes
after water is supplied or it does not reach the preset water
level within 25 minutes.
level within 25 minutes.
• The load is too small.
• The appliance is tilted.
• Laundry is gathered to one side.
• Non distributable things are put into the drum.
• The appliance is tilted.
• Laundry is gathered to one side.
• Non distributable things are put into the drum.
• Door not all the way closed.
• Loose electrical connections at Door switch and PWB
• Loose electrical connections at Door switch and PWB
Assembly.
• The DOOR SWITCH ASSEMBLY is out of order.
• Not fully drained within 10 minutes.
• The SENSOR SWITCH ASSEMBLY is out of order.
• The THERMISTOR is out order.
• Water is overflowing (water level frequency is over 213).
If is displayed, the drain pump will operate to drain
the water automatically.
If you press the START/PAUSE button when an error is displayed, any error except
will
disappear and the machine will go into the pause status.
In case of
In case of
,
,
if the error is not resolved within 20 seconds, or the in case of other
errors, if the error is not resolved within 4 minutes, power will be turned off automatically and the error
code will blink. But in the case of
code will blink. But in the case of
, power will not be turned off.
21
ERROR
SYMPTOM
CAUSE
LOCKED
MOTOR
ERROR
8
EEPROM
ERROR
9
POWER
FAILURE
10
• The connector (3-pin, male, white) in the MOTOR HARNESS
is not connected to the connector (3-pin, female, white) of
STATOR ASSEMBLY.
STATOR ASSEMBLY.
• The electric contact between the connectors (3-pin, male,
white) in the MOTOR HARNESS and 4-pin, female, white
connector in the MAIN PWB ASSEMBLY is bad or unstable.
connector in the MAIN PWB ASSEMBLY is bad or unstable.
• The MOTOR HARNESS between the STATOR ASSEMBLY
and MAIN PWB ASSEMBLY is cut (open circuited).
• The hall sensor is out of order/defective.
• EEPROM is out of order.
Displayed only when the START/PAUSE button is first
pressed in the Load Test Mode.
pressed in the Load Test Mode.
• After the power supply is stopped while washing machine is
working, the power is supplied rapidly
22
8-3. TROUBLESHOOTING SUMMARY
kr
a
m
e
R
tl
us
e
R
ec
n
ar
el
ot(
)
%
5
6
8 t
A
℉
0
3(
℃
)
4
0
1 t
A
℉
0
4(
℃
)
0
4
1 t
A
℉
0
6(
℃
)
8
5
1 t
A
℉
0
7(
℃
)
3
0
2 t
A
℉
5
9(
℃
)
1
2
2 t
A
℉
5
0
1(
℃
)
k
5.
9
3
Ω
k
1.
6
2
Ω
k
1.
2
1
Ω
k
5.
8
Ω
k
8.
3
Ω
k
8.
2
Ω
sk
r
a
m
e
R
tl
us
e
R
ec
n
ar
el
ot(
)
%
5
6
8 t
A
℉
0
3(
℃
)
4
0
1 t
A
℉
0
4(
℃
)
0
4
1 t
A
℉
0
6(
℃
)
8
5
1 t
A
℉
0
7(
℃
)
3
0
2 t
A
℉
5
9(
℃
)
1
2
2 t
A
℉
5
0
1(
℃
)
1
4
2 t
A
℉
6
11
(
℃
)
6
6
2 t
A
℉
0
3
1(
℃
)
3
9
2 t
A
℉
5
4
1(
℃
)
0
2
3 t
A
℉
0
6
1(
℃
)
6
5
3 t
A
℉
0
8
1(
℃
)
k
5.
9
3
Ω
k
1.
6
2
Ω
k
1.
2
1
Ω
k
5.
8
Ω
k
8.
3
Ω
k
8.
2
Ω
k
1.
2
Ω
k
4.
1
Ω
k
0.
1
Ω
k
7.
0
Ω
k
4.
0
Ω
p
m
a
L
V
5.
6
1 :
3
ni
P
ot
1
ni
P
D
R
r
ot
si
mr
e
h
T
r
ot
si
mr
e
ht
hs
a
W :
4
ni
P
r
o
s
n
e
S l
l
a
H
r
ot
o
M
U :
1
ni
P
D
D
R
V :
2
ni
P
W :
3
ni
P
+ :
1
ni
P
A
A
N
b
H :
2
ni
P
a
H :
3
ni
P
D
N
G :
4
ni
P
h
cti
w
S
r
o
o
D
C
T
P :
1
ni
P
A
N
C
T
P :
2
ni
P
e
vl
a
V t
el
nI
hs
a
w
ni
a
M :
3
ni
P
_
A
N
3
L
B
4
L
B
n
o
m
m
o
C :
1
ni
P
hs
a
w
er
P :
2
ni
P
hc
a
el
B :
3
ni
P
evl
av
t
o
H :
4
ni
P
tl
us
e
R
T
st
ni
o
P t
s
e
k
2
1
~
8
Ω
k
2
1
~
8
Ω
c
d
V
5
1
~
0
1
c
d
V
0
1
c
d
V
0
1
kr
a
m
e
R
V
t
u
p
nI
e
g
atl
o
l
a
n
gi
S
g
ni
sl
u
P
l
a
n
gi
S
g
ni
sl
u
P
2
ni
P
ot
1
ni
P
3
ni
P
ot
1
ni
P
4
ni
P
ot
1
ni
P
4
ni
P
ot
2
ni
P
4
ni
P
ot
3
ni
P
tl
us
e
R
T
st
ni
o
P t
s
e
0
0
5
1-
0
0
7
Ω
0
9-
0
6
Ω
yti
nif
nI
c
a
V
0
2
1
kr
a
m
e
R
7
7 t
A
℉
5
2(
℃
)
7
7 t
A
℉
5
2(
℃
)
V
t
u
p
nI
e
g
atl
o
4
ni
P
ot
2
ni
P
4
ni
P
ot
3
ni
P
5
ni
P
ot
4
ni
P
4
ni
P
ot
2
ni
P
r
ot
ar
e
n
e
g
m
a
et
s
tl
us
e
R
T
st
ni
o
P t
s
e
0
Ω
0
Ω
0
Ω
0
Ω
3
ni
P
D
R
ot
1
ni
P
H
W
1
ni
P
D
R
ot
3
ni
P
H
W
3
ni
P
H
W
ot
1
ni
P
L
Y
1
ni
P
H
W
ot
2
ni
P
L
Y
:r
et
a
e
H
8
1-
2
1
:
2
ni
P
ot
1
ni
P
2.
1
~
8.
0
r
et
a
e
H
)t
u
p
ni(
c
a
V :
1
ni
p ,
K
B ,
L
B
2
ni
p ,
L
B
r
ot
ar
e
n
e
g
m
a
et
s :
)t
u
p
ni(
r
et
a
e
h
)t
u
p
ni(
r
et
a
e
h
hs
a
w :
2
ni
p,
K
B
/r
ot
ar
e
n
e
g
m
a
et
s :
2
ni
p
,
L
Y
)t
u
pt
u
o(
r
et
a
e
h
hs
a
w
)t
u
pt
u
o(
c
a
V :
1
ni
p
Ω
Ω
r
o
s
n
e
S
G
A
D
N
G :
1
ni
p
,
L
Y
S :
2
ni
p
L :
4
ni
p
p
m
u
P
p
m
u
p
n
oit
al
uc
ri
C :
3
ni
P
3
L
B
p
m
u
p
ni
ar
D :
1
ni
P
4
L
B
3
ni
p
3
L
B
ot
1
ni
p ,
4
L
B
V
0
2
1 :
g
ni
n
n
ur
p
m
u
P .
1
%
5
V
1
~
0 :
p
m
u
P/r
ot
o
M
d
e
p
p
ot
S .
2
tl
us
e
R
T
st
ni
o
P t
s
e
0
2-
0
1
Ω
0
3-
8
1
Ω
)
2(
ot
)
1(
)
2(
ot
)
1(
tl
us
e
R
T
st
ni
o
P t
s
e
5
1
~
5
Ω
5
1
~
5
Ω
5
1
~
5
Ω
2
ni
P
ot
1
ni
P
3
ni
P
ot
2
ni
P
1
ni
P
ot
3
ni
P
r
ot
si
mr
e
h
T
r
ot
ar
e
n
e
g
m
a
et
S
W
r
ot
si
mr
e
ht
h
s
a
23
8-4. TROUBLESHOOTING WITH ERROR
INLET VALVE ERROR
Is displayed?
When you press both
STEAN button and
PRE-WASH button
simultaneously,
is the water level frequency
below 24.6 kHz?
STEAN button and
PRE-WASH button
simultaneously,
is the water level frequency
below 24.6 kHz?
(Refer to 7-3.)
Is filter inlet valve clogged
with foreign material?
with foreign material?
Is the connector connected to
inlet valve assembly
disconnected or
disassembled?
disconnected or
disassembled?
Is resistance between
each terminal of INLET
VALVE ASSEMBLY
0.8-1.2 k
each terminal of INLET
VALVE ASSEMBLY
0.8-1.2 k
Ω?
(Refer to 9-5 inlet valve
assembly)
assembly)
Clean or
replace the filter.
replace the filter.
Check the AIR
CHAMBER
and the tube
(clogged).
CHAMBER
and the tube
(clogged).
Yes
No
No
Yes
Yes
Reconnect or
repair
the connector.
repair
the connector.
Replace the
INLET VALVE
ASSEMBLY.
INLET VALVE
ASSEMBLY.
Yes
Yes
Is the voltage of the inlet
valve connector 120 V AC?
(Check the all terminal of
INLET VALVE ASSEMBLY
while the power is on.)
valve connector 120 V AC?
(Check the all terminal of
INLET VALVE ASSEMBLY
while the power is on.)
Replace the
INLET VALVE
ASSEMBLY.
INLET VALVE
ASSEMBLY.
No
Yes
Is the connector connected to
MAIN PWB assembly
disconnected or dis-
assembled?(NA4, BL3, BL4)
disconnected or dis-
assembled?(NA4, BL3, BL4)
Reconnect or
repair
the connector.
repair
the connector.
No
Yes
Yes
Is Electrical connection
correct?
correct?
(Refer to 9-5 wiring diagram)
Replace the
MAIN HARNESS.
No
No
After checking connector,
is the water level frequency
below 24.6 kHz?
is the water level frequency
below 24.6 kHz?
(Refer to 7-3)
Replace the MAIN PWB
ASSEMBLY.
ASSEMBLY.
[Note] Environmental safety check list
1) No water tap leakage
2) No water tap freeze
3) No entanglement of water supply hose
4) No water shortage
5) No shrinkage on water supply hose due to
1) No water tap leakage
2) No water tap freeze
3) No entanglement of water supply hose
4) No water shortage
5) No shrinkage on water supply hose due to
a possible misuse of hot and cold water
6) No water supply hose leakage
Check the
PRESSURE
SWITCH.
PRESSURE
SWITCH.
Yes
No
No
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