DOWNLOAD LG F12A8HD / F12A8HD5 Service Manual ↓ Size: 17.82 MB | Pages: 55 in PDF or view online for FREE

Model
F12A8HD F12A8HD5
Pages
55
Size
17.82 MB
Type
PDF
Document
Service Manual
Brand
Device
Washing Machine
File
f12a8hd-f12a8hd5.pdf
Date

LG F12A8HD / F12A8HD5 Service Manual ▷ View online

30
YES
Is the resistance of the 
Thermistor
out of range 44 ~
53 KΩ at 25°C? (Page 17) 
Replace the 
Main PCB
.
Is the 
Connector
connected correctly to 
the 
Main PCB
and the 
Thermistor
and the 
Heater
?
Or is the 
Harness
alright ?
Reconnect or repair the 
Connector
.
Or replace the 
Harness
.
Replace the 
Thermistor
.
YES
Replace the 
Heater
.
YES
NO
Is the resistance of the 
Heater
out of range 24.5 ~
28.5Ω (for Washing) or 42.5 ~ 49.5Ω (for Steam) ?
(Page 19) 
[Note] Thermistor Spec
NO
NO
Thermistor (Heating) Error (tE)
S
P
E
C
Temp
30 °C
40 °C
60 °C
70 °C
95 °C
105 °C
Resistance (kΩ)
MIN
36.35
39.45
42.72
24.20
26.05
27.97
11.43
12.12
12.82
8.088
8.514
8.940
3.544
3.791
4.045
2.617
2.816
3.023
STD
MAX
Heater for Washing
Heater for Steam
31
NO
Are the resistance of the 
Hall Sensor
5~15kΩ?
Motor Locked Error (LE)
[Pre Check]
• Gentle wash cycles, such as Perm Press, Delicates, Hand Wash, and Wool/Silk should only be used for smaller loads.
Because these cycles are more gentle in tumbling and spinning, putting too much in the drum can register an issue
with the motor. Remove items, reset unit and test with a Rinse/Spin cycle.
• Don’t replace the PCB, when the hall sensor is replaced.
Replace the PCB, when the LE is displayed after replacing the hall sensor.
Is the 
Connector
connected correctly to 
the 
Main PCB
and the 
Motor
?
Or is the 
Harness
alright ?
YES
NO
YES
YES
YES
YES
NO
Disassemble the 
Rotor
.
Are the 
Magnet
of rotor cracked or broken?
• Ha ~ Common 
: 5 ~ 15 k
• Hb ~ Common 
: 5 ~ 15 k
Replace the 
Main PCB
.
Press the 
Power
button & 
Start / Pause
button.
Does the
Drum 
stop when the start/pause button is pressed to start the cycle ?
Or Sometimes does the 
Drum
rotate weakly (under 15rpm)?
Magnet
Ha
Hb
Common
Are the resistance same
between 
Stator
points?
V~U / U~W / W~V : 8~11Ω
V  U  W
V   U   W
Reconnect or repair the 
Connector
.
Or replace the 
Harness
.
Replace the 
Rotor
.
Replace the 
Hall Sensor
.
Disassemble 
hall sensor carefully. 
(Next page)
NO
Replace the 
Stator
.
32
Disassemble the Hall Sensor
1) Disassemble the hook of Hall Sensor by (-) driver.
2) Pull up  Hall Sensor slowly as shown in picture. 
1) Adjust the hole of Hall Sensor to 
the hooks of stator as picture.(red circled)
2) Push down the Hall sensor, 
and assemble to the hook for sure.
Caution
If you disassemble by force,not following the directions, 
the hooks of stator(red circled) might broke up.
Hence need change of stator assembly. 
So disassemble cautiously.
1
Assemble the Hall Sensor
2
[Note]
Hall Sensor Part No.
• 24” / 25” : 6501KW2001A
• 27” : 6501KW2002A 
33
8. TROUBLESHOOTING WITHOUT ERROR CODES
No Power
Is the Power Plug connected
firmly to the power outlet? 
And is the supply voltage
220~240V AC?
Is 
Red LED ON 
while power supplied ?
Is Multi-plug socket used ?
NO
NO
NO
YES
YES
YES
NO
Is the connectors connected
Correctly to the Display 
PCB?
Is the 
Connector
connected correctly to 
the 
Main PCB
and the 
Noise Filter
?
Or is the 
Harness
alright ?
Noise Filter
Main PCB
PCB
Reconnect 
Power Plug
firmly. 
Check the fuse or 
reset the circuit breaker.
Don’t use 
Multi-plug
socket.
Use 
Single Plug
socket for 
washing machine.
YES
YES
Reconnect or repair the 
Connector
.
Or replace the 
Harness
.
Check connectors otherwise.
Replace 
Display PCB
.
Check and replace 
Main PCB
.
Page of 55
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