DOWNLOAD LG 41472 Service Manual ↓ Size: 10.52 MB | Pages: 60 in PDF or view online for FREE

Model
41472
Pages
60
Size
10.52 MB
Type
PDF
Document
Service Manual
Brand
Device
Washing Machine
File
41472.pdf
Date

LG 41472 Service Manual ▷ View online

7. TEST MODE
20
7-1. SAFETY CAUTION
There's built-in AC 110V 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. 
7-2. LOAD TEST MODE.
The washer must be empty and the controls must be in the off state. 
1. Press the SPIN SPEED and SOIL LEVEL buttons simultaneously.
2. Press the POWER       button, while the above condition. Then buzzer will sound twice.
3. Press the Steam button.
4. Press the START/PAUSE      button repeatedly to cycle through the test modes.
7-3. HOW TO CHECK THE WATER LEVEL FREQUENCY
Press the WASH/RINSE and DELAY S
button simultaneously.
The digits indicate the water level frequency ( x.1 kHz ).
So, for example a display indicating 241: a Water level frequency of 241 x.1 kHz
=  24.1 kHz
None 
1 time 
2 times 
3 times 
4 times 
5 times 
6 times 
7 times 
8 times 
9 times 
10 times
11 times
Turns on all lamps and locks the door.
Tumble clockwise.
Low speed Spin.
High speed Spin.
It will be take about 2minits to be
high speed spin
Inlet valve for prewash turns on.
Inlet valve for main wash turns on.
Inlet valve for hot water turns on.
Inlet valve for bleach turns on.
Tumble counterclockwise.
Heater turns on for 3 seconds.
Drain pump turns on.
off
LOAD TEST MODE
rpm (42~50)
rpm (35~45)
rpm (110~117)
Water level frequency (0~255)
Water level frequency (0~255)
Water level frequency (0~255)
Water level frequency (0~255)
rpm (42~50)
Water temperature
Water level (0-255)
-
Number of times the
Start/Pause button is pressed
Check Point
Display Status
NOTES:
RPM < 220 : RPM = display / RPM > 200 : RPM = display X 10
WATER LEVEL : o255 = empty / o248 = normal / o255 = tub clean
None 
1 time 
2 times 
3 times 
4 times 
5 times 
6 times 
7 times 
8 times 
9 times 
10 times 
11 times 
12 times 
13 times 
14 times
Turns on all lamps.
Tumble clockwise.
Low speed Spin.
High speed Spin.
Inlet valve for prewash turns on.
Inlet valve for main wash turns on.
Inlet valve for Hot water turns on.
Inlet valve for bleach turns on.
Inlet valve for steam turns on.
Tumble counterclockwise.
Heater turns on for 3 seconds.
Circulation pump turns on.
Drain pump turns on.
Steam water level sensor operates.
Steam Heater turns on for 1.2 sec.
LOAD TEST MODE
rpm (42~50)
rpm (35~45)
rpm (110~117)
Water level frequency (0~255)
Water level frequency (0~255)
Water level frequency (0~255)
Water level frequency (0~255)
Water level frequency (0~255)
rpm (42~50)
Water temperature
Water level frequency (0~255)
Water level frequency (0~255)
AG tub water level frequency (0~255)
Number of times the
Start/Pause button is pressed
Check Point
Display Status
15 times
Vibration sensor check
16 times
off
- None error (bs0)
- Main vibration error (bs1)
- Display vibation error (bs2)
- Both error (bs3)
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. 
21
8. TROUBLESHOOTING
8-1. SAFETY CAUTION
8-2. ERROR MODE SUMMERY
ERROR
SYMPTOM
CAUSE
WATER INLET
ERROR
1
UNBALANCE 
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.
• The load is too small.
• 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
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 
,
,
if the error is not resolved within 20 sec., or the in case of other errors,
if the error is not resolved within 4 min., power will be turned off automatically and the error code will
blink. But in the case of 
, power will not be turned off.
22
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. 
• 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.
• 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 QC Test Mode.
• The washer experienced a power failure.
2 3
CIRCUIT DIAGRAM
8-3. TROUBLESHOOTING SUMMARY
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