LG WT5680HVA / WT5680HWA Service Manual ▷ View online
29
1) SAFETY CAUTION
• The main power board assembly has exposed live 120 VAC and live DC voltages. Use care when disconnecting
connectors during troubleshooting and testing. (Wear electrostatic discharge gloves when handling the board.
• Unplug the power when handling the board assembly. (Wear electrostatic discharge gloves when handling the
board. Store the board in an ESD [ElectroStatic Discharge] plastic bag.)
2) SERVICE MODE
The washer must be empty and the controls must be plugged in and turned off.
• Press the POWER button: then press and hold the Wash Temp. and Soil Level buttons. The buzzer will sound
twice.
• Press the Start/Pause button to advane to the subsequent test mode step.
4-3. TEST RUNNING WITHOUT WATER
Number of times the
START/PAUSE
button is pressed
Check Point
Display Status
None
Main program version
T1 and main program version
1 time
Display program version
T2 and display program version
2 time
None
T3
3 time
Inlet valve for bleach detergent turnson. (Cold Water)
A and water level frequency (1~10 Level)
4 time
⁕ On :67~33 (26.7kHz~23.3kHz)Inlet valve for softener
dispenser turnson. (Hot water)
⁕ The meaning of 67~33 number is26.7kHz~23.3kHz
reallyB and water level frequency (1~10 Level)
5 time
Inlet valve for J-dispenser turns on.(Cold Water)
C and water level frequency (1~10 Level)
6 time
Heater check (on heater model)
T4 and the coefficient of flood sensing
7 time
Heater check (on heater model)
T5 and alpha RPM
8 time
Drain pump and agitate (pulsator) check
T6 and water level frequency
9 time
Load sensing Check
T7 and the coefficient of load sensing
10 time
Agitate (tub) check
T8 and RPM
11 time
Spin Check
T9 and RPM
12 time
Off
• Unlocks the door
• Turns off all LED
None
30
Many washing problems involve poor soil and stain removal, residues of lint and scum, and fabric damage. For
satisfactory washing results, follow these instructions.
Use ONLY powdered or liquid HE (High Effificiency) detergents. Do NOT use flakes scraped from a soap
cake or bar, flakes, soap ribbons (available in some markets,) detergent tablets, plastic pouches, magic
laundry balls, or anything other than powdered or liquid HE detergent products. Do not use soap of any kind.
Do not use other types of detergent or soap products, such as hand soap, dishwashng liquid, or any others.
4-4. TROUBLESHOOTING BY COMMON WASHING PROBLEMS
WASHING PROBLEM
Problems
Poor soil
removal
Blue Stains
Black or gray
marks on
clothes
Yellow or
brown rust
stains
Lint
Residue or
Detergent
Holes, tears,
or snags
Possible Causes
· Insufficient detergent
· Wash water temperature too low
· Incorrect wash cycle
· Laundry missorted
· Stains not properly pretreated
· 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
· Excessive detergent
· Incorrect use of chlorine bleach.
· Unfastened zippers, hooks,
buckles
· Ribs, tears and broken threads
· Overloading the washer
· Degradation of fabric
Solutions and 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 10)
Reduce load size.
Wash with heavy or soak & heavy 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 15.
Pretreat the stain with detergent or a stain removal agent.
Do not overfill fabric softener dispenser and do not pour liquid fabric
softener directly onto fabric.
See page 13 for more instructions.
Keep the recommendations against scum (waxy buildup).
Use correct amount of detergent for load size, soil level,
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.
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 11 for adding liquid bleach.
Fasten zippers, hooks, and buckles.
Remove objects in pockets. See page 9 for caring before loading.
Do not overload the washer.
4-5. TROUBLESHOOTING SUMMARY
31
Pin1: Rx Pin2:
Tx
Pin3: Smps2_5v Pin4: GN
D
Pin5: Standby Pin6: Smps2_13v Pin7: Boot
76.5 kΩ
50.6 kΩ
23.6 kΩ
16.6 kΩ
7.5 kΩ
5.6 kΩ
ret
ae
H
A
WT5170H*/WT5680H* doesn’t have part
.
B
A
B
WT5070CW / WT5075CW dosen’t have part
.
4-6. TROUBLESHOOTING WITH ERROR CODE
32
Trouble
Check
Counterplan
IE
1. Verify the valve is open and water is on.
2. Check the filter on inlet valve whether
clogged with foreign material or not.
3. Check the connector of valve and RD6 on PCBA.
4. Check the testmode (Testmode 3)
5. Check the valve resistance. (0.8-1.2 kΩ)
1. Turn the tap on.
2. Clean or replace the filter
3. Reconnect or repair the connector
4. Replace the PCBA
5. Replace the inlet valve assembly.
OE
1. Check the test mode (Testmode 6)
2. Check the connector of PCBA or pump or
connection connector
3. Check the connection from PCB to pump by tester
4. Check the pump SPEC (resistance of the coil is
10-20 Ω) and input voltage on working (120V±5%)
1. Replace the PCBA
2. Reconnect or repair the connector
3. Replace harness
4. Replace pump
dE
1. Connect other doorlock switch and check the lid
sensing by magnet
1. Replace the doorlock switch or PCBA
dL
1. Check the doorlock switch trying locking
2. Check the balance of the lid.
1. If trying, replace the doorlock switch.
Or not trying replace the PCBA
2. Replace the door or set the balance
FE
1. Check the Water level
(1) Power on and run
(2) Press the SPIN SPEED & DELAY WASH
2. Check the valve
1. If segment is displayed under 10,
replace the PCBA
2. Replace the valve
tE
1. Check the connector of PCBA (YL2) or thermistor
or connection connector
2. Check the cutted connection from PCB to
thermister by tester
1. Reconnect or repair the connector
2. Replace harness
PE
1. Check the Presure Sensor (21~23 Ω ±10%) and
connection
2. Check the Connector (BL6)
1. Reconnect or repair the connector
LE
1. Check the connector of PCBA (YL3, BL6) or
motor connector or connection connector
2. Check the magnet for Rotor
3. Check the Rotor Resistance (YL3) 5 to 15 Ω
(U-V, V-W, W-V :U=1, V=2, W=3)
1. Reconnect or repair the connector
2. Replace the rotor.
3. Replace the stator.
LE1
1. Check Foreign objects, such as coins, pins, clips,
etc., being caught between the wash plate and the
inner basket.
1. Turn off the washer and then press the
Power button.
2. Press the spin speed button without
selecting a cycle to drain and spin the load.
3. When the spin is complete, remove the
clothes and then find and remove any
objects caught in the wash plate.
No Power
1. Check the fuse for noise filter and PCBA by tester
2. Check the IPM
-. Check the Short between top switch
Heatsink and YL3 pin by Tester
1. If the beep sounds, the fuse is OK.
If no beep, change the noise filter, including
the fuse.
2. If beep sound, replace the PCBA.
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