LG F0903RDT Service Manual ▷ View online
21
Is the water coming in
drawer
drawer
continuously?
Replace the
Main PCB
.
After power off for 10 sec. and power on.
Does the water level over reference line
Does the water level over reference line
and Is
not
the water level frequency 26.2Khz ?
Or does
not
the water level over reference line
and is the water level frequency 26.2Khz ?
* Water level frequency
- Press and Hold
'Rinse+'
&
'Temp'
simultaneously.
Replace the
Inlet Valve
assembly.
YES
If FE is displayed again,
then replace the
then replace the
Pressure Switch
.
If FE is displayed again,
then replace the
then replace the
Main PCB
.
Check the
Air Chamber
and the
Tube
(clogged).
NO
NO
YES
Over Flow Error (FE)
The digits means water level frequency. (10
-1
kHz)
ex) 241 : Water level frequency = 241 x 10
-1
kHz
24.1 kHz
22
Is the air chamber and the tube clogged?
Replace the
Main PCB
.
Is the
Connector
connected correctly to
the
Main PCB
and the
Pressure Switch
?
Or is the
Harness
alright ?
Reconnect or repair the
Connector
.
Or replace the
Harness
.
Check air chamber and remove the foreign material.
Replace the
Pressure Switch
.
YES
YES
NO
Is the resistance of the
Pressure Switch
out of range?
[Pin1 ~ Pin3]
21~23Ω)
NO
NO
YES
Pressure Sensor S/W Error (PE)
23
NO
Is the door closed?
Is the Door assembly in line with door
switch ?
Lift up & Close the door.
If the dE is displayed, Replace the
Door Bracket
.
Close the door totally.
YES
Reconnect or repair the
Connector
.
Or replace the
Harness
.
NO
Replace the
Latch Hook
.
NO
Replace the
Door switch
.
NO
Does the
Spring
of
Latch Hook
actuate?
Door Open Error (dE)
YES
YES
YES
NO
Scratch by Latch Hook
Touching
or
Is the
Connector
connected correctly to
the
Main PCB
and the
Door Switch
?
Or is the
Harness
alright ?
Does the
Door Switch
operate as follows?
* Door Locking time :
1~8
sec.
Check the time between from
input the power to parts
move up, then Door locked.
input the power to parts
move up, then Door locked.
1
1
24
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)
(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
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