DOWNLOAD LG WF-759G Service Manual ↓ Size: 9.1 MB | Pages: 62 in PDF or view online for FREE

Model
WF-759G
Pages
62
Size
9.1 MB
Type
PDF
Document
Service Manual
Brand
Device
Washing Machine
File
wf-759g.pdf
Date

LG WF-759G Service Manual ▷ View online

42
4-6. TEST RUNNING WITHOUT WATER
1) METHOD TO USE QC TEST MODE
EX-LARGE
LARGE
MEDIUM
SMALL
8
4
2
1
8
4
2
1
8
4
2
1
FUZZY
ECONOMY
JEAN
WOOL
TURBO(SOAK) , Speedy soak
WASH
RINSE
SPIN
8
4
2
1
EX-LARGE
LARGE
MEDIUM
SMALL
8
4
2
1
8
4
2
1
FUZZY
ECONOMY
JEAN
WOOL
TURBO(SOAK), Speedy soak
WASH
RINSE
SPIN
• To use the CHECK PROGRAM (QC TEST MODE), press PROCESS key, and PROGRAM key at the
same time and then the POWER switch on without depositing any laundry.
NO CHECK METHOD
LED INDICATOR
CHECK ITEM
1
2
3
4
5
6
7
8
Initial state
Press once
Press twice
Press 3 times
Press 4 times
Press 5 times
Press 6 times
Press 7 times
• After laundry amount detecting,
LED indicates laundry amount
and WATER LEVEL.
• Pump model: MEDIUM water
level Led ON.
• Non-pump model:water level
MEDIUM water level Led OFF.
• All LED on.
• After 2~3 seconds water level
frequency is displayed on LED.
• Laundry amount test.
• After checking laundry amount, motor
is on. (Left & Right)
• Cold water
• Hot water.
• Drain motor is 1st state is play.
• If lid is opened door error display.
(wash and spin LED blinks)
• Drain motor is 2nd state.(Only WF-T Series)
• Drain pump is on.
• AUTO off switch.
• WATER LEVEL FREQUENCY & LAUNDRY AMOUNT ARE DISPLAY BY THE LED (WATER LEVEL,
PROCESS, PROGRAM)
Ex) Water level check ; Frequency : 26.7 KHz
Ex) Laundry amount ; Water level : MEDIUM
Pulse : 25
43
4-7. TROUBLE SHOOTING AGAINST COMMON WASHING PROBLEMS
Many washing problems involve poor soil & stain removal, residues of lint and scum,
and fabric damage. For satisfactory washing results, follow these instructions.
WASH PROBLEM
Possible Causes
Problems
Solutions & Preventive Measures
• Use correct amount of detergent for load size, amount of soil
and water hardness.
• Use warm or hot water for normal soil.
Different water temperature may be required according to soil
type. 
(refer to page 12)
• Reduce load size.
• Wash with Jean or Soak(Turbo) & Jean wash cycle for heavy
soiled laundry.
• Separate heavily soiled items from lightly soiled ones.
• Pretreat stain and heavy soil according to directions shown on
page 11.
• Rub the stain with bar soap. Wash.
• Do not overfill fabric softener dispenser and do not pour liquid
fabric softener directly onto fabric. 
See page 14 for more instructions.
• Keep the recommendations against Scrud(waxy buildup). (refer
to scrud page14.)
• Use correct amount of detergent for load size, amount of soil
and water hardness.
• To restore discolored load of whites, use rust remover safe for
fabric.
• Install nonprecipitating water softener or an iron filter in your
water supply system for an ongoing problem.
• Before washing, run water for a few minutes to clear lines.
• Wash lint givers eg towels, flannelette sheets, separately from lint
collectors eg synthetic fabrics and remove tissues in pockets
before wash. See page 11 for sorting and caring before loading.
• Do not overload the washer
• Do not overload the washer.
• Some detergents need to be pre-dissolved, check the detergent
instructions. Try pre-dissolving the detergent.
• Increase water temperature using hot water safe for fabric.
• Use proper amount of detergent.
• Never pour chlorine bleach directly on fabric. 
See page 13 for adding liquid bleach.
• Fasten zippers, hooks, and buckles.
• Remove objects in pockets. See page 11 for caring before
loading.
• Do not overload the washer.
Poor soil
removal
• Not enough detergent
• Wash water temperature
too low.
• Overloading the washer
• Incorrect wash cycle
• Incorrect sorting
• Do not pretreat stain
• Undiluted fabric softener
dispensed directly onto
fabric
• A buildup caused by the
interaction of fabric
softener and detergent can
flake off and mark clothes
• Not enough detergent
• Iron or manganese in
water supply, water pipes,
or water heater
• Incorrect sorting
• Tissues left in pocket
• Overloading the washer
• Overloading the washer
• Undissolved detergent
• Use too much detergent
• Incorrect use of chlorine
bleach.
• Unfastened zippers,
hooks, buckles
• Ribs, tears and broken
threads
• Overloading the washer
• Degradation of fabric
Blue Stains
Holes, tears,
or snags
Black or gray
marks on
clothes
Yellow or
brown rust
stains
Lint
Residue or
detergent
44
4-8. TROUBLE SHOOTING METHODS ACCORDING TO ERROR MESSAGE
For more detailed information for trouble shooting refer to page 40 to 51. 
ERROR DECISION
CAUSE FOR ERROR
BASIS
OCCURRENCE
REMEDY
ERROR
• Water level does not
rise to the set level
in 40 minutes.
• Wash and rinse 
LED blink.
• Water is not
completely drained
in 10 minutes.
• Rinse and spin 
LED blink.
• Laundry unbalance
during spin.
• Wash, Rinse and
Spin LED blink.
• In the second QC
Mode the following
message is displayed.
• All of process LED
blinks.
• LID is opened in the
course of
intermittent spin,
normal spin or
processing
reservation.
• Wash and Spin 
LED blink.
• SIGNAL
continuously ringing.
• BALL PRESSURE
SENSOR is off.
• All water level 
LED blinks.
• AUTO OFF relay is
out of order.
WATER
SUPPLY
& INLET
VALVE.
DRAINAGE
UNBALANCE
OVER
FLOODING
ERROR
DOOR
OPEN
BALL
PRESSURE
SENSOR
AUTO
OFF
• Water faucet is closed?
• Water supply is interrupted.
• Inlet V/V is clogged with dirts.
• Connector has bad contact to
the inlet valve.
• Yellow(YL) 2 pin connector has
bad contact to the P.W.B ASM.
• Is the drain hose located
properly?
• Drain hose is folded or clogged
due to freeze or dirts.
• Bad Drain Motor part or  2 pin
connector to the P.W.B ASM has
bad connection.
• Laundry in the INNER TUB is
filled unevenly.
• Washer is tilted.
• Is the CONNECTOR of Ball
pressure sensor disconnected
or badly touched?
• Check INLET valve
• Lid is opened during intermittent
spin or normal spin?
• Lid is opened while processing
reservation?
• Is placed magnetic in Lid-B 
• Connector the BALL
PRESSURE SENSOR  or
BLUE(BL) 3 pin connector to
P.W.B ASM has bad connection.
• BALL PRESSURE SENSOR is bad.
(In the initial state of QC TEST
MODE, the number on the
DISPLAY is less than 63 or
more than 70)
• BLUE(BL) 1pin connector to
P.W.B ASM has bad connection.
• Open water faucet.
• Wait until water supply is
resumed.
• Clean or replace filter.
• Correct the connector contact.
• Same as above.
• Put the hose lower.
• Unclog the drain hose.
• Replace Drain Motor or correct
the connector contact.
• Try to fill laundry uniformly in the
inner tub.
• Adjust the leg.
• Check B.P SENSOR
CONNECTOR or replace B.P
sensor
• Closed the lid.
• Closed the lid.
• Change the Lid-B.
• Correct the connector contact.
• Replace BALL PRESSURE
SENSOR.
• Correct the connector contact.
• Change PWB ASM.
45
4-9.  HOW TO DIAGNOSE AND REPAIR BY SYMPTOM
1) Washer is not energized.
Where, what & how to check?
Result of Check Possible Cause
How to repair & settle
Household Power supply
1. Check whether connection between
the plug and the electrical is poor
2.  Measure voltage of the electrical.
Wiring of the Washer
1. Measure resistance between both 
ends of the power supply cord with 
both the plug pins short-circuited.
2. Check whether every connector in 
the bundle of connectors has a 
good connection.
3. Check resistance of every wire to 
find out a open wire.
Electrical component
1. Check resistance with  power relay 
switch turned on
2. Check the secondary voltage of the 
transfomer.
3. Measure resistance to check 
whether the T.P of the motor is 
blown out.
4. Check whether the fuse is open.
Controller
If there are no defects in the above, 
it should be defect of the controller.
If supply voltage is 120% higher than
rating the varistar in the controller may
be broken. Check supply voltage.
Poor
Around rating
0V
Less than 1
Male & female
connectors
separated
Less than 0.5
More than 1.0
10~14V
0V
motor is hot
Open
Over 120%
voltage than 
rating check
Defect of the 
electrical
No defect
Defect of household
power supply
No defect
Open circuit of the
power supply cord
Poor connection.
Wire is opened.
No defect
Poor contact
No defect
Coil is open
T.P blown out
Defect of the fuse
Change the electrical.
Call for power supply 
company
Change the power 
supply cord.
Remove the cause to 
give strain and 
reconnect them.
Change the lead wire.
Change the Auto Off 
Switch
Change the
transfomerformer.
Remove cause to 
overload the motor
Change the fuse.
CAUTION
Check the fuse rating
AC100~127V:125V 12A
AC220~240V:250V   6A
Change the controller
if all the electrical parts 
have no defects.
Page of 62
Display

Click on the first or last page to see other WF-759G service manuals if exist.