LG 48842800 Service Manual ▷ View online
16
7. TEST MODE
7-1. SAFETY CAUTION
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 SPIN SPEED and SOIL LEVEL 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
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 softener turns on.
Inlet valve for bleach turns on.
Tumble counterclockwise.
Heater turns on for 3 sec.
Drain pump turns on.
Power off and unlock the door.
rpm (40~50)
600 rpm
1100 rpm
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 (40~50)
Water temperature
Water level frequency (25~65)
Turn off all lamps.
The digits indicate the water level frequency ( x.1 kHz ).
For example, if the display indicate 241,
the water level frequency is 241 x 0.1kHz = 24.1kHz.
For example, if the display indicate 241,
the water level frequency is 241 x 0.1kHz = 24.1kHz.
Number of times the
Start/Pausebutton is pressed
Check Point
Display Status
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.
17
8. TROUBLESHOOTING
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 (2 level) 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 (over 8 level).
If is displayed, the drain pump will operate to the
drain water automatically.
drain water automatically.
8-1. SAFETY CAUTION
8-2. ERROR MODE SUMMERY
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.
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.
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.
18
ERROR
SYMPTOM
CAUSE
OVER
CURRENT
ERROR
8
LOCKED
MOTOR
ERROR
9
EEPROM
ERROR
POWER
FAILURE
10
11
• MAIN PWB ASSEMBLY is out of order.
• Winding in the STATOR ASSEMBLY is short-circuited.
• EEPROM is out of order.
Displayed only when the START / PAUSE button is first
pressed in the Load Test Mode.
• After the power supply is stopped while washing machine is
working, the power is supplied rapidly.
• 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.
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.
19
8-3. TROUBLESHOOTING SUMMARY
Remark
Result
(tolerance
T
est
Points
(1)
to
(2)
5%)
At 77
℉
(25
℃
)
At 86
℉
(30
℃
)
At 122
℉
(50
℃
)
At 158
℉
(70
℃
)
At 194
℉
(90
℃
)
At 212
℉
(100
℃
)
50 k
Ω
39.2 k
Ω
15.2 k
Ω
6.6 k
Ω
3.1 k
Ω
2.2 k
Ω
Motor
Hall Sensor
RD
Pin1: U
Pin2: V
Pin3: W
NA
Pin1: +
Pin2: Hb
Pin3: Ha
Pin4: GND
Door Switch
WH Pin1: PTC
RD
Pin2: PTC
Result
T
est Points
60~120
Ω
Infinity
120 V
ac
Remark
At 77
℉
(25
℃
)
At 77
℉
(25
℃
)
V
oltage Input
(2) to (4)
(3) to (4)
(4) to (5)
(2) to (4)
Result
T
est Points
0
Ω
0
Ω
WH Pin1 to RD Pin3
WH Pin3 to RD Pin1
Heater
X71(WH) pin2: V
ac (input)
X133(BK) pin2 : Heater (input)
WH
pin1 : V
ac (output)
W
ash thermistor
Thermistor
Pin1: W
ash thermistor
Result
T
est Points
5~15
Ω
5~15
Ω
5~15
Ω
Pin1 to Pin2
Pin2 to Pin3
Pin3 to Pin1
Pin1 to Pin2 :
0.8-1.2k
Ω
W
ash Heater :
12~18
Ω
Drain Pump :
10~20
Ω
Inlet V
alve
NA_
Pin3: Main wash
BL3
BL4
Pin1: Common
Pin2: Pre wash
Pin3: Bleach
Pin4: Hot valve
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
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
Ω
1k
1k
5%
Click on the first or last page to see other 48842800 service manuals if exist.