DOWNLOAD LG F74A8QDS Service Manual ↓ Size: 13.21 MB | Pages: 57 in PDF or view online for FREE

Model
F74A8QDS
Pages
57
Size
13.21 MB
Type
PDF
Document
Service Manual
Brand
Device
Washing Machine
File
f74a8qds.pdf
Date

LG F74A8QDS Service Manual ▷ View online

27
Water Outlet Error (OE)
Is the drain hose kinked ?
Check drain hose for kink and straighten the 
Hose
.
Drain Hose
Is the 
Pump filter
clogged ?
Next Page
Check & Clean 
Pump Filter
.
YES
YES
NO
NO
This kind of accumulation on the drain filter not only
prevents proper drainage, but also will promote
bacteria growth and cause odors.
This drain filter should be cleaned once a month.
* How to disassemble and clean pump filter
Open the Cover by coin or
finger(only new model)
Cover
Drain water by removing the
hose cap.
Disassemble the pump
filter by turning the filter
cap counterclockwise.
Filter clogged by foreign objects
Assemble & close cap
Pump Filter
filter Cap
Hose Cap
Clean the filter
Filter Cap
28
Is the 
Connector
connected correctly to
the 
Main PCB
and the 
Pump Motor 
?
Or is the 
Harness
alright ?
Is the 
Standpipe Height
greater
than 1.0 m above the floor?
When there is no water in the
pump casing, is the water level
frequency over 26.0khz ?
Observe 
Standpipe Height
requirements 
of 
1.0
m
maximum.
- Your washer will not be able to drain out 
water adequately, if the standpipe exceeds 1.0 m.
In this case, water may flow back into the washer.
Check the 
Air Chamber
and the 
Tube
(clogged).
Check the water level frequency again, if it is over
25.5KHz, replace the 
If it is clogged, Pressure
switch.
YES
NO
Reconnect or repair the 
Connector
.
Or replace the 
Harness
.
NO
Replace the 
Main PCB
.
NO
Replace the 
Pump Motor
.
Is the resistance of the Pump Motor out
of range 152~175Ω?
Or is the Impeller operating normally?
Does the Pump motor start, when the spin mode
starts?
Clean the drain hose.
If the drain hose blocked?
Escape
Binding
NO
NO
YES
YES
YES
OR
YES
YES
29
Power off for 10sec. Then power on.
Is the water level over reference line and is the water level frequency under 21.3kHz?
* Water level frequency
- Touch and Hold '
Pre Wash
' & '
Temp.
simultaneously.
FE (Overflow Error)
If FE is displayed again, 
then replace the 
Pressure Switch
.
If FE is displayed again, 
then replace the 
Main PCB
.
Drain out the water and then
check the 
Air Chamber
and the 
Tube
(clogged).
NO
NO
YES
YES
Is water continuously
coming into the drawer?
Replace the 
Main PCB.
Replace the 
Inlet Valve 
assembly.
Data view type: ‘040’
30
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
?
Is the 
Harness
alright ?
Reconnect or repair the 
Connector
.
Or replace the 
Harness
.
Check air chamber and remove foreign material.
Replace the 
Pressure Switch
.
YES
YES
NO
Is the resistance of the 
Pressure Switch
out of range? 
[Pin1 ~ Pin3] 
21~23
Ω)
NO
NO
YES
Pressure Sensor S/W Error (PE)
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