DOWNLOAD LG 29478 Service Manual ↓ Size: 11.88 MB | Pages: 55 in PDF or view online for FREE

Model
29478
Pages
55
Size
11.88 MB
Type
PDF
Document
Service Manual
Brand
Device
Washing Machine
File
29478.pdf
Date

LG 29478 Service Manual ▷ View online

29
None
1 time
2 time
3 time
4 time
5 time
6 time
7 time
8 time
9 time
10 time
11 time
Main Program Version
Display Program Version
None
Inlet valve for Bleach Detergent turns 
on. (Cold Water)
✽ On :67~33(26.7kHz~23.3kHz)
Inlet valve for Softener Dispenser turns
on. (Hot Water)
Inlet valve for J-Dispenser turns on.
(Cold Water)
Heater check (on heater model)
Wave force check
Drain pump and Agitate (Pulsator) check
Agitate (Tub) check
High speed spin
Off
. Unlocks the door
. Turns off all LED
T1 and Main Program Version
T2 and Display Program Version
T3
A and Water level frequency (1~10 Level)
✽ The meaning of 67~33 number is
26.7kHz~23.3kHz really
B and Water level frequency (1~10Level)
C and Water level frequency (1~10Level)
T4 and the coefficient of flood sensing
T5 and the coefficient of load sensing
T6 and Water level frequency
T7 and the coefficient of load sensing
T8 and RPM
None
Number of times the
START/PAUSE
button is pressed
Check Point
Display Status
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) QC TEST MODE 
The washer must be empty and the controls must be plugged in and turned off.
• Press the POWER button to turn on.
• Press the display LCD for 3 seconds. Follow the picture.
• While the above condition. Then buzzer will sound twice and Display change to QC Test mode.
4-3. TEST RUNNING WITHOUT WATER
< Press the ‘Prefs’ button >
< Press the display LCD for 3 seconds >
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.
NOTE: NEVER use bar soap in the washing machine.
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 Scrud (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.
·Wash lint-producing items, like flannel sheets, towels, and the
like separately from dark fabrics and fabrics that tend to collect
lint. Remove all items, including tissues and papers, from the
pockets of items to be washed. See page 9 for sorting
information. 
·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.
4-4. TROUBLESHOOTING BY COMMON WASHING PROBLEMS
4-5. TROUBLESHOOTING SUMMARY
31
Heater
4-6. TROUBLE SHOOTING WITH ERROR
32
Trouble
IE
OE
dE
dL
FE
tE
PE
LE
No Power
1. Check the tap turned 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 resister (0.8-1.2 k
Ω)
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. Connect other Doorlock SW and check the Lid
sensing by magnet
1. Check the Doorlock SW trying locking
2. Check the balance of the lid.
1. Check the Water level 
(1) Power on and run 
(2) Press the SPIN SPEED & DELAY WASH
2. Check the valve
1. Check the connector of PCBA(YL2) or Termister 
or connection connector
2. Check the cutted connection from PCB to 
Termister by tester
1. Check the Presure Sensor(21~23 
Ω ±10%) and
connection
2. Check the Connector(BL6)
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 
(U-V, V-W, W-V :U=1, V=2, W=3)
1. Check the Fuse for Noise Filter and PCBA by Tester
2. Check the IPM 
-. Check the Short between Top SW 
Heatsink and YL3 pin by Tester
Check
counterplan
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.
1. Replace the PCBA
2. Reconnect or repair the connector
3. Replace Harness
4. Replace Pump
1. Replace the Doorlock SW or PCBA
1. If trying, replace the Doorlock SW. Or 
not trying replace the PCBA
2. Replace the door or set the balance
1. If segment is displayed under 10, 
replace the PCBA
2. Replace the valve
1. Reconnect or repair the connector
2. Replace Harness
1. Reconnect or repair the connector
1. Reconnect or repair the connector
2. Replace the ROTOR
3. Replace
4. the STATOR
1. If beep sound, Fuse is ok. but no beep
change the Component included fuse
2. If beep sound, replace the PCBA
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