LG F1021ND / F1021ND5 Service Manual ▷ View online
21
NO WATER SUPPLY
Is the water supply shut-off?
Is the tap opened?
Open the tap.
NO
YES
NO
Water level frequency below 240?
Check the chamber (Air)
and the tube clogged
with impurity.
NO
YES
Is the inlet valve filter clogged with
impurity?
impurity?
Is resistance of the inlet valve connector
between the 2 to 8 k
Ω
?
Clean the filter.
NO
YES
Check the voltage between each
terminals of inlet Valve is 220 - 240V~.
(Refer to 7-2 TEST MODE)
Replace the inlet valve.
Replace PWB assembly
YES
NO
NO
DETERGENT DOES NOT FLOW IN
Is water supplied?
Refer to solution
NO INLET
YES
NO
Are receptacles correctly connected to
the terminals of inlet valve?
Check the wiring on the
dispenser.
dispenser.
YES
NO
Is detergent put in the correct
compartment of the drawer?
Is the detergent caked or hardened?
Clean the drawer.
Put the detergent in the
correct position
correct position
PRE+MAIN
MAIN WASH
: Detergent
YES
YES
NO
max
SOFTENER
MAIN
WASH
PRE-
WASH
option (HOT)
option (HOT)
22
SOFTENER DOES NOT FLOW IN
ABNORMAL SOUND
Is water supplied?
Are receptacles correctly connected to
the terminals of inlet valve?
the terminals of inlet valve?
Refer to
NO WATER SUPPLY
Check the wiring on the
dispenser.
YES
YES
NO
Is softener put in the correct
compartment of drawer?
Put it in the correct
compartment.
NO
Is the softner cap clogged?
NO
Clean the cap and
drawer.
drawer.
YES
YES
Is the motor bolt loosened?
Is there friction noise from the motor?
Fix the bolt tightly.
Replace the STATOR
assembly or ROTOR
assembly.
assembly or ROTOR
assembly.
NO
YES
YES
option (HOT)
23
HEATING WITHOUT WATER
Water level frequency 252 or more?
Water level frequency between
230~245~?
Replace the sensor
(pressure)
YES
NO
Checking voltage between two
[Yellow(RD), Black(YL)]pins as press
the power button is the voltage
220 - 240V~ in without water condition
Replace the PWB
assembly
YES
DRAIN MALFUNCTIONING
Is the drain hose twisted or frozen?
Repair drain hose
NO
YES
Is the impeller of the drain pump clogged?
Remove foreign
material.
material.
NO
YES
Is the connector disconnected,
disassembled?
disassembled?
Is the coil of drain pump cut-off?
(resistance of coil is 90~160
Ω
)
When checking voltage between
connectors ( , ) on spinning, is the
voltage 220 - 240V~ as the figure?
Replace the pump
assembly
Replace the PWB
assembly (Main)
Reconnect or repair the
connector
connector
NO
NO
YES
NO
YES
1
2
AC 220~240V
PWB ASSEMBLY (MAIN)
PWB ASSEMBLY (MAIN)
24
WASH HEATER TROUBLE
When checking the voltage between
connector ( , ) the PWB assembly
(Main) during cotton 95°C washing ,Is
the voltage 220 - 240V ~ ?
After power off,is the resistance of wire
(RED-YELLOW) connectors between
10
(RED-YELLOW) connectors between
10
Ω
to 30
Ω
?
After power off and the heater terminal
is disconnected, is the resistance
10 to 30
is disconnected, is the resistance
10 to 30
Ω
?
Replace the PWB
assembly (Main)
Normal
Replace the
heater assembly
YES
NO
NO
YES
NO
HEATING CONTINUOUSLY ABOVE
THE SETTING WATER TEMPERATURE
When disconnect the connector (1) on
the PWB assembly (Main) is the
resistance of the Red connectors [
(BL/WH), (SBL)] between 2.5k
Ω
to
180k
Ω
(105°C
0°C
When checking thermistor on the tub,
is the thermistor loosened above 2mm
from the rubber?
Replace the thermistor
(6322FR2046C)
Push the thermistor
tightly to the rubber.
YES
NO
YES
220-240V~
PWB ASSEMBLY (MAIN)
1
2
3
RED
YELLOW
1
2
3
4
3
4
(1)
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