LG WM2487HWM 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.
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 Start/Pause button repeatedly to cycle through the test modes.
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 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 WASH button simultaneously.
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
15 times
Turns on all lamps and locks the door.
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 steam turns on.
Inlet valve for bleach turns on.
Tumble counterclockwise.
Heater turns on for 3 sec.
Circulation pump turns on.
Drain pump turns on.
Water level Sensor for Steam
Steam Heater turns on for 1.2 sec.
Off
rpm (42~50)
rpm (55~65)
rpm (125~135)
Water level frequency (25~65)
Water level frequency (25~65)
Water level frequency (25~65)
Water level frequency (25~65)
Water level frequency (25~65)
rpm (42~50)
Water temperature
Water level frequency (25~65)
Water level frequency (25~65)
Water level frequency of TSG(0~255)
TSG temperature
-
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
Number of times the
Start/Pause button is pressed
Check Point
Display Status
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.
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
IMBALANCE
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.
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.
• 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
• 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
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
blink. But in the case of
, power will not be turned off.
22
ERROR SYMPTOM
CAUSE
• The connector (3-pin, male, white) in the MOTOR
HARNESS is not connected to the connector
(3-pin, female, white) of STATOR ASSEMBLY.
(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.
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).
circuited).
• The hall sensor is out of order/defective.
8
9
LOCKED
MOTOR
ERROR
• The washer experienced a power failure.
POWER
FAILURE
• EEPROM is out of order.
※ Displayed only when the START/PAUSE button is first
pressed in the QC Test Mode.
10
EEPROM
ERROR
23
8-3. TROUBLESHOOTING SUMMARY
Remark
Result
(tolerance
5%)
At 86
℉
(30
℃
)
At 104
℉
(40
℃
)
At 140
℉
(60
℃
)
At 158
℉
(70
℃
)
At 203
℉
(95
℃
)
At 221
℉
(105
℃
)
39.5 k
Ω
26.1 k
Ω
12.1 k
Ω
8.5 k
Ω
3.8 k
Ω
2.8 k
Ω
Remarks
Result
(tolerance
5%)
At 86
℉
(30
℃
)
At 104
℉
(40
℃
)
At 140
℉
(60
℃
)
At 158
℉
(70
℃
)
At 203
℉
(95
℃
)
At 221
℉
(105
℃
)
At 241
℉
(1
16
℃
)
At 266
℉
(130
℃
)
At 293
℉
(145
℃
)
At 320
℉
(160
℃
)
At 356
℉
(180
℃
)
39.5 k
Ω
26.1 k
Ω
12.1 k
Ω
8.5 k
Ω
3.8 k
Ω
2.8 k
Ω
2.1 k
Ω
1.4 k
Ω
1.0 k
Ω
0.7 k
Ω
0.4 k
Ω
Lamp
RD Pin1 to Pin3: 16.5 V
Thermistor
Pin4: W
ash thermistor
Motor
Hall Sensor
RD
Pin1: U
Pin2: V
Pin3: W
NA
Pin1: +
Pin2: Hb
Pin3: Ha
Pin4: GND
Door Switch
NA
Pin1: PTC
Pin2: PTC
Inlet V
alve
NA_
Pin3: Main wash
BL3
BL4
Pin1: Common
Pin2: Pre wash
Pin3: Bleach
Pin4: Hot valve
Result
T
est Points
8~12 k
Ω
8~12 k
Ω
10~15 Vdc
10 Vdc
10 Vdc
Remark
V
oltage Input
Pulsing Signal
Pulsing Signal
Pin1 to Pin2
Pin1 to Pin3
Pin1 to Pin4
Pin2 to Pin4
Pin3 to Pin4
Result
T
est Points
700-1500
Ω
60-90
Ω
Infinity
120 V
a
c
Remark
At 77
℉
(25
℃
)
At 77
℉
(25
℃
)
V
oltage Input
Pin2 to Pin4
Pin3 to Pin4
Pin4 to Pin5
Pin2 to Pin4
steam generator
Result
T
est Points
0
Ω
0
Ω
0
Ω
0
Ω
WH Pin1 to RD Pin3
WH Pin3 to RD Pin1
YL
Pin1 to WH Pin3
YL
Pin2 to WH Pin1
Heater:
12 -18
Pin1 to Pin2:
0.8~1.2
Heater
BL, BK, pin1: V
ac (input)
BL, pin2
: steam generator
heater (input)
BK,
pin2: wash heater (input)
pin2: steam generator/
YL,
wash heater (output)
pin4: V
ac (output)
Ω
Ω
AG Sensor
YL,
pin1: GND
pin2: S
pin4: L
Pump
BL3 Pin3: Circulation pump
BL4 Pin1: Drain pump
BL4, pin1 to BL3 pin3
1. Pump running: 120V
5%
2. Stopped Motor/Pump: 0~1V
Result
T
est Points
10-20
Ω
18-30
Ω
(1) to (2)
(1) to (2)
Result
T
est Points
5~15
Ω
5~15
Ω
5~15
Ω
Pin1 to Pin2
Pin2 to Pin3
Pin3 to Pin1
Steam generator Thermistor
W
ash thermistor
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