DOWNLOAD LG 41532 Service Manual ↓ Size: 22.57 MB | Pages: 59 in PDF or view online for FREE

Model
41532
Pages
59
Size
22.57 MB
Type
PDF
Document
Service Manual
Brand
Device
Washing Machine
File
41532.pdf
Date

LG 41532 Service Manual ▷ View online

26
DRAIN ERROR
Is                     displayed?
Check the connectors at the
main PCB and the drain
pump.  Are the connectors
loose or disconnected?
Reconnect or
repair
the connector.
Yes
Circulation pump
Yes
Drain pump
Connection connector
No
No
When you press both
WASH TEMP button and
DELAY START button
simultaneously, is the
water level <250?
Proceed to next step at right
Check the air
dome and
pressure hose
for clogging.
Check the
pressure
switch.  See
test #2.
Measure the resistance of
the drain pump motor.  Is
the resistance between 10
and 20
Ω ?
(Refer to 9-4 Pump motor
assembly.)
Replace the
DRAIN PUMP
ASSEMBLY.
Yes
Yes
Check the voltage between
the main PCB connectors
NA4-1 BN and BL3-1 BK.  Is
the voltage 120 VAC ± 5%?
TO TURN ON THE DRAIN PUMP:
1. Turn on the washer
2. Press the SPIN SPEED button to select LOW
speed.
3. Press the START/PAUSE button.
The drain pump will be energized for several
minutes at the beginning of the spin cycle.
ALWAYS CHECK FOR EXTERNAL CAUSES
Kinked or clogged drain hose
Frozen drain hose
Foreign objects clogging the drain pump filter
Foreign objects caught in pump impeller
Replace the
MAIN PWB
ASSEMBLY.
No
No
27
HEATING ERROR
Is                 displayed?
Check the connectors at the
main PCB, the heater and the
thermistor.  Are the
connectors loose or
disconnected?
Reconnect or
repair
the connector.
Yes
Yes
Check the resistance of the
heater.  Is the resistance
between 12Ω and 18Ω ? 
(Refer to 9-6 Heater
assembly.)
Proceed to next step at right
Replace the
HEATER
ASSEMBLY.
No
Yes
No
Check the thermistor
resistance.  Is the resistance
correct according to the
chart?
(Refer to 9-7 thermistor
assembly.)
Replace the
THERMISTOR
ASSEMBLY.
Yes
No
Are the thermistor terminals
dry and free of corrosion?
[Note]
The temperature sensing circuits on the main
PCB are very simple, consisting only of resistors
and capacitors.  Problems with wiring or
connections in the thermistor circuit are the
most likely cause for this error.  Be sure to
check ALL connections and wiring thoroughly.
The main PCB should only be replaces as a last
resort, as it is unlikely to be the cause.
Replace the
THERMISTOR
ASSEMBLY.
Yes
Steam generator heater
Wash heater
Is the connector connected to
thermistor disconnected or
disassembled?
Reconnect or
repair
the connector.
Yes
No
Steam generator thermistor
Wash thermistor
28
LOCKED MOTOR ERROR
Is                 displayed?
Check the connectors at the
main PCB and the main
motor.  Are the connectors
loose or disconnected?
Main PCB connectors RD3
and NA4
Motor connectors to stator and
hall sensor
Reconnect
the connector.
(connector /
wire / motor )
Replace
the ROTOR.
Yes
Yes
Motor Drive
Is rotor magnet cracked?
Magnet
Hall sensor
Motor Drive Hall Sensor
- part of wire
- part of motor
Motor
Yes
Yes
Yes
Replace
the STATOR.
Check the resistance of the
stator winding from the main
PCB connector RD3.  Is the
resistance between each
pair or wires between 5  and
15 ? (Measure pins 1-2, 1-3
and 2-3.) 
No
Replace
the Hall
sensor.
Is hall sensor out of
order? 
(Refer to 9-3
Stator assembly/Hall
sensor.)
Yes
No
Replace the
MAIN PWB
ASSEMBLY.
Check the IPM in the
controller.
No
29
DOOR OPEN ERROR
Is                 displayed?
Yes
Check the connectors at the
main PCB and the door
switch.  Are the connectors
loose or disconnected?
Reconnect or
repair
the connector
No
Yes
Can you hear the door latch
attempting to lock the door
at the beginning of the cycle
or diagnostic mode?
Is the spring in the door
latch hook on the door
strong and tight?
Replace the
PCB
ASSEMBLY.
Replace gasket
or hinge.
Remove foreign
objects.
No
No
If tested off the stator using
the diagram above ohm
check the resistors from pin
5 to pin 1 & pin 2. Does
either test show an open
(infinity) the hall sensor?
(You should measure
approximately 10,000 ohms
from pin 5 to pin 1 and
10,000 ohms from pin 5 to
pin) 
Replace the
DOOR
SWITCH
ASSEMBLY.
No
Yes
Yes
Is the door closing properly?
Is the gasket damaged and
interfering with the door or
latch?  Are there foreign
objects caught in the door?
Is the hinge damaged? 
Prceed to next step at right
Replace
Door
Assembly
Yes
No
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