LG 29278 Service Manual ▷ View online
37
6) Display "LE" message and doesn't work
When, what, and how to check
Result of Check
Possible Cause
How to repair
1. LE error code appears.
1) Check the hall sensor, as shown.
2) Check resistance of the motor.
Gray-White
DC 15V
DC 15V
OV
Gray - Red
-Blue
DC 12V
OV
Infinite resistance.
Normal Resistance
Correct reading.
Defective
Correct reading.
Defective
The motor has an open
coil.
coil.
Normal condition.
Replace the main board.
Replace the main board.
Replace the motor.
Motor is good.
Hall sensor
assembly
assembly
Black / (Ground)
White
Blue
Red
In PCB assembly
Brown
DC 15V
38
7) Water does not drain.
When, what, and how to check
Result of Check
Possible Cause
How to repair
Drain Pump
1. Can you hear the drain pump running?
2. Check resistance between terminals if
there is no working sound of the drain
pump.
pump.
3. If the motor tests good, check the
connector.
Drain Hose
1. Verify the drain hose is not pinched,
kinked, or mashed.
2. Verify the drain hose is not clogged or
obstructed.
Yes
∞Ω
LEAVE BLANK
LEAVE BLANK
Pinched, kinked, or
mashed.
mashed.
LEAVE BLANK
Drain pump is blocked by
foreign objects.
foreign objects.
The motor is open.
Defective connector.
Connector OK.
Incorrect installation.
Blocked hose.
NOTE: There is no place to
do this. Please include the
correct pump information for
this machine. This is useless.
do this. Please include the
correct pump information for
this machine. This is useless.
Replace the pump.
Replace the main board.
Replace the main control
board.
board.
Reinstall correctly.
Unstop the hose and re-
install it so it is not kinked,
pinched, or mashed.
install it so it is not kinked,
pinched, or mashed.
8) Water drains, but at the wrong time
When, what, and how to check
Result of Check
Possible Cause
How to repair
PV asm
1. If water runs back into the machine after
the drain cycle, inspect the pump's
check valve to verify it is not obstructed
by lint or foreign material.
check valve to verify it is not obstructed
by lint or foreign material.
Controller
1. Check to see if the drain pump or drain
motor runs at power up (before the
POWER button is pressed.
POWER button is pressed.
Blockage in pump
housing or drain
bellows.
housing or drain
bellows.
Check valve and / or
drain bellows
deformed or
damaged.
drain bellows
deformed or
damaged.
The pump runs.
LEAVE BLANK
Defective triac on main
board.
board.
Remove the blockage or
foreign objects.
foreign objects.
Replace the check valve and
/ or the bellows. These soft
rubber parts may swell if
contacted by petroleum-
based products.
/ or the bellows. These soft
rubber parts may swell if
contacted by petroleum-
based products.
Replace the main board.
39
9) Water drains when it should not
When, what, and how to check
Result of Check
Possible Cause
How to repair
Drain Hose
1. Verify the drain hose is inserted in a
standpipe or drain that is 0.9 ~ 1.2 m
(36 ~ 46 inches) above the floor.
(36 ~ 46 inches) above the floor.
Discharge height
incorrect.
incorrect.
Incorrect installation.
Insert the drain hose in a
standpipe or drain that is
0.9 ~ 1.2 m (36 ~ 46 inches)
above the floor.
standpipe or drain that is
0.9 ~ 1.2 m (36 ~ 46 inches)
above the floor.
10) Drain error (DE) is displayed even when water drains normally
When, what, and how to check
Result of Check
Possible Cause
How to repair
Pressure Switch
1. In TEST MODE, check the pressure
switch frequency with the tub empty.
Below 26.3 kHz
Between 26.3 and
27.1 kHz
27.1 kHz
Defective pressure
switch
switch
Defective main board
Replace the pressure switch.
Replace the main board.
11) Machine spins even with lid open
When, what, and how to check
Result of Check
Possible Cause
How to repair
Lid Switch
1. Check resistance between both
terminals on the lid switch with the lid
open.
open.
0~9
Ω
∞Ω
Contacts of switch are
welded.
welded.
Defective main board.
Change the lead wire
assembly.
assembly.
Replace the main board.
40
12) Vibration, Noise or Unbalance Error happens during spin.
When, what, and how to check
Result of Check
Possible Cause
How to repair
Using conditions such as
installation etc.
installation etc.
2. Verify the load is not unbalanced,
causing vibration and noise.
Suspension
1. Does the outer tub strike the top cover
during a spin cycle when the washer is
running empty?
running empty?
※ It is very important to determine the cause of any noise or defect in order to repair the problem correctly the first time.
Not leveled.
Laundry is
unbalanced.
unbalanced.
The pulsator rotates
initially, then the
inner
tub rotates.
initially, then the
inner
tub rotates.
Yes
Incorrect installation.
Defective clutch.
Oneor more of the
suspension rods is
defective.
suspension rods is
defective.
Level the washer.
Rearrange items in the tub
for a more even distribution.
for a more even distribution.
Replace the clutch spring ot
the clutch assembly, as
necessary.
the clutch assembly, as
necessary.
Replace all four suspension
rods as a set. Be sure to get
the rods in the correct
positions.
rods as a set. Be sure to get
the rods in the correct
positions.
13) Power turns ON or OFF by itself.
When, what, and how to check
Result of Check
Possible Cause
How to repair
Input voltage
1. This is usually caused by a spike or
surge on the main power input to the
house.
house.
Noise on the power line.
If the issue persists, contact
the local power provider.
the local power provider.
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