LG WD1316AD7 Service Manual ▷ View online
33
Softener
cap
ABNORMAL SOUND
LIQUID DETERGENT/SOFTENER DOES NOT FLOW IN
Secure the bolt.
Replace the STATOR
ASSEMBLY or ROTOR
ASSEMBLY.
Refer to
NO WATER SUPPLY
Check the wiring on the
dispenser.
Put it in the correct
compa rtment.
Clean the Cap and
Container.
Is the motor bolt loosened?
Is there friction noise coming from the motor?
Is water supplied?
Are the plugs correctly connected to the terminals of
the INLET VALVE ASSEMBLY?
Is liquid detergent/softener/bleach put in the correct
compar tment of the drawer?
Is the liquid detergent/softener/bleach cap clogged?
34
Replace the
SENSOR SWITCH
ASSEMBLY.
When pressing WASH/RINSE and SOIL LEVEL at
the same time after draining, is the water level
frequency 255?
When pressing WASH/RINSE and SOIL LEVEL
buttons at the same time while washing, is the water
level frequency between 230 - 243 ?
Replace the MAIN PWB
ASSEMBLY.
Check the voltage between two pins while pressing
the POWER button. Is the voltage 220-240 V AC?
Repair the DRAIN HOSE
ASSEMBLY.
Is the drain hose twisted or frozen?
Remove foreign material.
Is the impeller of the drain pump clogged?
Reconnect or repair the
connector
Is the connector disconnected, disassembled?
Replace the DRAIN
PUMP ASSEMBLY.
Is the coil of the drain pump too high or low?
(resistance of the coil is 10-20 Ω)
Replace the MAIN PWB
ASSEMBLY.
When checking voltage between connectors during
spin, is the voltage 220 V AC as in the figure?
HEATING WITHOUT WATER
DRAIN MALFUNCTION
35
9. COMPONENT TESTING INFORMATION
9-1. FILTER ASSEMBLY (LINE FILTER)
When Resistance (Ohm) checking the Component, be sure to turn the power off,
and do voltage discharge sufficiently.
WARNING
Wiring
diagram
Circuit in the MAIN PWB / Wiring Diagram
Vac
MAIN PWB
ASSEMBLY
FUSE
RD1
WH1
LI
L2
I
C
I
R
C2
C3
3
2
1
3
2
1
Test
points
and
Result
and
Result
Test Points
Result
WH (1) to RD (3)
WH (3) to RD (1)
WH (3) to RD (1)
0 Ω
0 Ω
0 Ω
(3)
(1)
WH1
(3)
(1) RD1
36
9-2. DOOR LOCK SWITCH ASSEMBLY
Wiring
diagram
Circuit in the MAIN PWB / Wiring Diagram
MAIN PWB
Vdc
Vac
MICOM
12V
4 1
3 2
4 1
3 2
Relay
Relay
NA4
1
2
3
4
1
2
3
4
2
3
4
PT
C
PT
C
Door switch
SO
LENO
ID
ID
5
YL
BL
RD
BK
AC
Common
terminal
of valve
Function
The door lock switch assembly consists of a heating PTC, a bimetal,
a protection PTC, and a solenoid. It locks the door during the wash cycle.
1.Operation for door closing
- After the system turns on, PTC heating starts up through terminals 2 and
4 authorizing the power on.
- After PTC heating starts up and before solenoid operation is driven,
force the system to the off position through CAM.
Door close
- Authorizing one impulse through terminal 3~4 (PTC & solenoid) will
make the door locked.
- Door lock is detected when switches in terminal 4~5 are set closed.
CAM rotation will forcibly clear off the connection.
The maximum, allowable number of impulse authorizations is 2.
Upon the third authorization of the impulse, the position of CAM goes
back to the door-open position.
- Authorizing the impulse occurs in 4.5 seconds upon input for max
performance and two authorization processes are allowed at most.
Normal operation period of PTC heating: 1.5 – 5 seconds.
(Defects from the development process.)
2.Operation for door opening
- With a temporary stop, door automatically opens by CAM rotations after
authorizing the impulse from the terminal, 3 ~ 4 and the power turns
off – maximum of 3 times of the authorizing period.
- Upon the fourth authorization of the impulse, the position of CAM goes
back to the door-close position.
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