LG WF-D70VBA / WF-D70WSA / WF-D80VBA / WF-D80WSA Service Manual ▷ View online
12. Maintenance Guide
12-1.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.
damage. For satisfactory washing results, follow these instructions.
WASH PROBLEM
Problems
Possible causes
Solution& Preventive Measures
Poor soil removal
● Not enough detergent
● Wash water temperature
too low
● Overloading the washer
● Incorrect wash cycle
● Incorrect sorting
● Do not pretreat stain
● Wash water temperature
too low
● Overloading the washer
● Incorrect wash cycle
● Incorrect sorting
● Do not pretreat stain
● 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.
type.
● Reduce load size
● Wash with POWER cycle for heavy soiled laundry
● Separate heavily soiled items from lightly soiled ones.
● Wash with POWER cycle for heavy soiled laundry
● Separate heavily soiled items from lightly soiled ones.
Blue, Gray or Brown
stains
stains
●Undiluted fabric softener
dispensed directly onto
fabric
fabric
● Rub the stain with bar soap. Wash.
● Do not overfill fabric softener dispenser and do not pour
● Do not overfill fabric softener dispenser and do not pour
liquid fabric directly onto fabric.
Black or gray marks
on clothes
on clothes
● A buildup caused by the
interaction of fabric
softener and Detergent
can flake off and mark
clothes.
softener and Detergent
can flake off and mark
clothes.
● Not enough detergent
● Use correct amount of detergent for load size, amount of
soil and water hardness.
Yellow or brown rust
stains
stains
● Iron or manganese in
water supply, water pipes
● Not enough detergent
water supply, water pipes
● Not enough detergent
●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.
lines.
Lint
● Incorrect sorting
● Tissues left in pocket
● overloading the washer
● Tissues left in pocket
● overloading the washer
● Wash lint givers eg towels, flannelette sheets, separately
from lint collectors eg synthetic fabrics。
● Remove tissues in pockets before wash. See attentions
for sorting and caring before loading.
● Do not overload the washer
Residue or detergent
● Overloading the washer
●Undissolved detergent
● Use too much Detergent
●Undissolved detergent
● Use too much Detergent
● Do not overload the washer。
● Some Detergents need to be pre-dissolved, check the
● Some Detergents need to be pre-dissolved, check the
Detergent instructions. Try pre-dissolving the
Detergent in warm water.
Detergent in warm water.
● Increase Water Temperature using HOT water safe for
fabric.
● Use proper amount of Detergent.
fabric.
● Use proper amount of Detergent.
Holes, tears, or snags ● Incorrect use of chlorine
bleach
● Unfastened zippers,
● Unfastened zippers,
hooks, buckles
● Ribs, tears and broken
threads
threads
● Never pour chlorine bleach directly on fabric。
● Fasten zippers, hooks, and buckles。
● Fasten zippers, hooks, and buckles。
● Overloading the washer
● Degradation of fabric
● Degradation of fabric
● Remove objects in pockets。
● Do not overload the washer.
● Do not overload the washer.
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12-2. How to diagnose and maintain according to symptoms
1) Power Failure
Where, what and how
Check results
Possible
reasons
Solution measures
Power
Yes
Electric
problems
1. Check if the socket is in poor
contact.
Replace plugs
Normal
None
2. measure voltage
0V
Power
supply
Contact Power Supply Bureau
<1Ω
None
Washer harness
1. Measure power cord resistance with
plug short-circuit
Infinite
Power cord
cracks
Replace power cord
2. Check if all the connectors are
connected properly.
Separation of M and
F connectors
Poor contact
Connect again
3. Check all wire resistance
Infinite
Harness
cracks
Replace harness
<0.5Ω
None
>1Ω
Poor contact
Replace power cord
10-14V
None
Replace transformer
Electrical appliance
0V
Coil cracks
Replace filter
1.check if the fuse is damaged
Yes
Bad fuse
Replace filter
PC board
Replace PC board if all
appliances are not damaged.
It must be that PC board damage if
problems are not mentioned above.
15% higher than
standard voltage.
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2) Display problem
Where, what and how
Check results
Possible reasons
Solution measures
Main voltage
1. measure main voltage
Less than 85% of normal
voltage
Low voltage
Because of low voltage
supply.
Please
use
transformer if voltage is
keeping low.
2. measure external insert
row voltage if main
voltage is normal.
Less than 85% of normal
voltage
Wire is too small or there
are
too
many
connections on insert
row.
Use transformer
PC board
1. LED damage
2. LED drive circuit
damage
3. Chips damage
PC board damage
Replace PC board
3) Restart during working
Where, what and how
Check results
Possible reasons
Solution measures
Main voltage
1. measure plug voltage
during working
Less than 80% of normal
voltage
Main voltage is too low or
wire size is too small.
Because of low voltage
supply and please use
suitable wire.
2. restart fault repeats
during special periods
Temporary voltage surge
Because of environmental
condition(high-frequenc
y voltage around)
3. check if there is voltage
change.(such as flashing
lights)
Because of power supply
environment
PC board
Replace PC board
1. It must be PC board
fault if there is no
main voltage fault.
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