Hudson WA400 Assembly instructions

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HA Repair Guide
Top-Load Washer
Hudson-PJT
WA400/422/456

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•Vibration
•Noise
Vibration
& Noise
•Water Leakage
Leakage
•Water Supply
•No Power
Improper
Operation
•Error mode
•Test mode / Diagnosis
Power &
Error
•Circuit Diagram / PBA
Appendix
Hudson-PJT Repair Guide
[ WA400/422/456]

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#1. Symptom : Vibration & Noise
1-1. Schematic Diagram of Repair
Check-1
Cause
Check-2
Tip
Code
Block
# 1
# 2
# 3
Spin-Vibration
1.Spin-basket defect
Spin friction abrasion
Concentricity Check (4mm↓)
Curing part burst
Spin-Nut loosening check
1-1
Spin-
Basket
Spin-Nut
+Clutch
Moisture-
proof
cloth
2.Damper defect
Tub moving inclination
check
Grease/Parts check
Low-temp installation
environment
1-2
Damper
Moisture-
proof
cloth
Low-
Temp
Environm
ent
3. Unstable installation
place
Floor moisture environment
Low-temp environment
installation
Dryer Pair installation
narrow
Rear hose interference
Floor shaking
1-3
Installatio
n place
Install
Environm
ent
4.Unstable installation of
product
Leg level installation check
Non-Slip Pad not attached
Moving Pad/Pan-Drain
1-3
Level
installatio
n
Non-Slip
Sheet
Install
Product Noise
1.Pump-Drain defect
Pump-Case damage
Fixing bolt loosening
Foreign substance in Pump
Impeller damage
1-4
Pump-
Case
Impeller
Foreign
Substanc
e
2.Clutch,Motor defect
Spin-mode PBA Check
Abnormal noise diagnosis
Motor friction Check
1-5
Main-PBA
(IPM)
Hall-S/S
Motor
3.MEMS Sensor defect
Error Mode Check -8E1
Voltage Check
Loose Terminal Check
4-11
Main-PBA
MEMS
Harness
4.Customer misunderstan
ding NDF
Customer use moisture-
proof cloth
Washing a little amount
Spin-only course used
Not using the Net only for
bedding
1-6
Moisture-
proof
cloth
Washing
of Little
Amount
Not using
for-
special-
use net
5. Product inherent
feature
Resonance RPM frequency
shaking
Shaking at the beginning
Sound of Tub water
(Add salt water to Balancer)
1-6
Resonance
Phenomen
on
Balancer
Chassis
Project
Basic Model
Type
Top-Load
Hudson
WA400/422/456
Tub With Pump / Tact Button

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Step 1
①Spin-Basket Exterior Damage Check
- Check the friction phenomenon at the top.
- Check the opening of Wrapper bottom.
※ If exterior damage or friction phenomenon occurs
as in the photo, replace the Spin-Basket & Tub-
Cover.
Step 2
①Spin Mode Check
- Turn knob and select SPN to start.
- Check if the max RPM is reached. (800rpm ±10%)
②Unbalance Test Check
- Run Spin Test with Unbalance 400g placed on one
side.
※ 400g – about 3 towels OR Jig for this purpose
only
- Check for abnormal noise & Set moving.
③If noise or operation does not seem normal, check
Step #3.
Step 3
①Spin-Basket Concentricity Check
- Turn the Spin-Basket based on 9 o’ clock direction
and measure the deviation.
- If it shakes more than 5mm, it is defect.
②Spin–Nut Loosening Check
- When Shaken, the Spin-Basket shakes.
- If the spot of Spin-Nut fastening is inclined to one
side, it is defect.
=> Spin-Basket concentricity defect & Spin-Nut
connection defect
- Replace the Spin-Basket & Spin-Nut.
- Check the customer usage condition and explain to
the customer how to.
※ Explain to the customer after SVC.
①Check the customer usage condition.
- Check if moisture-proof cloth is used and explain
not to use it.
: Water–Proof Sheet, Mats, clothing
Check Point Check the condition of Spin-Basket / usage environment.
Tip 1-1. Spin-Basket Abnormality
※ Press and hold Spin+Soil
and push the power button
=> Test Mode

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Step 1
①Check if Tub moves up and down.
- If the surrounding temperature is below zero at the
time of installation, explain to the customer that it
is inappropriate for the product installation.
②Check if there is noise.
- If Damper does not return or press when checking
abnormal noise & up-and-down movement, check
Step #2.
Step 2
①Check damper parts & the condition of grease
application.
- Check for the loosening of Damper inside.
: Sponge inside is damaged or omitted.
- Check the grease on Damper. Maintain Damper
smooth. Replace the Damper.
②Check if Damper is damaged.
- Replace the Damper.
- Check the usage condition of customer and provide
guidance.
※ Explain to the customer after SVC.
①Check the customer usage condition.
- Check if moisture-proof cloth is used and explain
not to use it.
: Water–Proof Sheet, Mats, clothing
Check Point Check the condition of Damper operation.
Tip 1-2. Damper Abnormality

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Step 1
①Check the frictional relationship with the
surroundings when installing.
- Install a pair of dryers attached. If frame is shaking
during spinning mode, interference noise is
generated.
②Friction occurs due to unstable shaping of water
supply/drain hose
- Prevent friction between water supply/drain hose and
product or wall.
③Floor is shaking, which makes the product move.
Case#1 –Levelness defect due to floor damage.
Case#2 –Shaking due to old laundry room
floor(lumber).
=> It is recommended to contact the installer and request
for re-installation such that it does not influence on
the vibration.
Step 2
①Check the condition of levelness of product
installation.
- For the left and right of product, check the level at
the top of Lid-T/C.
- For the front and rear of product, check the level on
the side of product.
※ When checking the left-and-right level of the product,
Tub is inclined to one side due to tension of Drain-
hose. (During water supply, it is in the right place.)
※ For level installation, adjust Leg to be attached to the
floor.
②Noise from Set on slippery floor (Tile, Moisture)
- Attach Non-Slip Pad to both front legs on the floor.
- Install the front legs of product to be located on the
Non-Slip Pad.
③Inappropriate material of leg for the floor
Case#1 Pan Drain Friction Noise
Case#2 Use paper for floor protection on the Leg
bottom.
=> It is recommended to contact the installer and request
for re-installation such that it does not influence on
the vibration.
Check Point Check the installation place & the condition of unstable installation.
Tip 1-3. Install Place & Unstable Install Abnormality

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Step 1
①Mechanical Friction Noise
- When pump drain is operating,
it vibrates a little. If drain parts such as
drain hose are near other parts, it may
cause mechanical friction noise.
Step 2
①Foreign materials in Pump Drain
- Open debris filter and check there are
foreign materials such as coins, pins etc.
- Check pump drain impeller is broken.
②If there is noise or operation is not smooth,
check Step #3.
Step 3
①Pump Drain
- If pump drain is defective,
it may cause noise during drain cycle.
In this case, replace pump drain.
②Small foreign materials
- When water is draining through drain hose,
small foreign materials could drain with
water because there is no filter.
So, it can make a little bit of noise but it is
not a problem
=> Replace the Pump-Drain.
Check Point Check the condition of Pump-Drain.
Tip 1-4. Pump-Drain Abnormality

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Step 1
①Check for the breakage of wire of washing
motor.
- Separate the Cover-Panel from product.
- Separate the 9Pin housing to measure the
Female terminal.
- Motor Coil Measurement
※ 3 phases of Coil R<->S<->T : 9.8±2Ω
※ Resistance changes due to influence by
Magnetic of Rotor.
②If coil value open defect, check the terminal pin
and replace the stator.
Step 2
①Check the operation of washing motor.
- Turn the power on and start the normal course.
- When weight-sensing is operating, check the
frictional noise of washing motor while Motor-L /
Motor-R is rotating.
②When there is abnormal noise or Rotor
constraint, replace the Rotor.
Step 3
①Check for Clutch noise during spinning mode.
- Press and hold Spin+Soil, while pushing the
power button. =>Test Mode
- Adjust knob and select SPN to start.
- Check if max RPM is reached. (800rpm ±10%)
②If noise is generated from Clutch, disassemble
the Rotor and check for abrasion.
- Disassemble the Rotor.
- Check for the abrasion of Gear of Clutch-Boss
assembly.
=> Replace deformed Clutch Lever and damaged Gear.
Check Point Check the condition of Clutch & Motor operation.
Tip 1-5. Clutch & Motor Abnormality
①②
③
①②
③
④

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Step 1
①Explain to the customer.
- Check the customer usage condition.
- Check if he/she uses moisture-proof cloth and tell
them not to use it.
: Water–Proof Sheet, Mats, clothing
②Unbalance vibration due to laundry inclined to one
side.
Case#1 –Inclination occurs due to washing small
amount or excessive amount.
Case#2 –Inclination occurs due to using spin-only
course.
Case#3 –When washing bedding, bedding net is not
used.
=> Check the customer usage condition and explain
how to use it correctly.
Step 2
①Resonance phenomenon occurs in the rising
section during spinning mode.
- Hudson Resonant Frequency : 200~450rpm section
- In the resonant frequency, Tub moves.
※ The resonance phenomenon occurs in the rpm
rising section at the beginning for spinning, which
is normal.
②The sound of water is generated when shaking
tub.
- Explain that the sound comes from salt water which
is the center of gravity in the Balancer and that it is
normal.
※ If there is no water sound in the Balancer when
checking the Tub, it is defect. Thus, replace the
Spin-Basket.
=> Explain that it is one of the characteristics created
while designing the product.
Check Point Explain the NDF and the product characteristics.
Tip 1-6. Explanation of NDF & Product Characteristics
Salt-Water

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#2. Symptom : Water Leakage
2-1. Schematic Diagram of Repair
Check-1
Cause
Check-2
Tip
Code
Block
# 1
# 2
# 3
Water Supply
1. Water Supply
Hose Connection
Tool over-connection
loose
Packing omitted
Y-Joint Seal water
leakage
Cold-water-only
installation
Wall-attached
installation
2-1
Water
Supply
Hose
Water
Supply
Valve
Y-Joint
2.Water-V/V
Leakage
Foreign substance
enters pipe
End of water supply
valve damaged
Body damage
Bad packing assembly
Freeze in the winter
2-2
Water
Supply
Valve
Water
Supply
Hose
Piping
3. Detergent
Drawer Leakage
Nozzle spray angle
Bleach overflow
Water pressure /
Inclined installation
Too much laundry
input
2-3
Install
Condition
-slope
-water
pressure
-filter
Nozzle
Washing
Amount
4.Tub-related
leakage
Water level hose
damage
Aquajet overflow
Tub Crack
Damage by coin
2-4
Tub
Coin
5.Pump leakage
Pump-Drain hose
Pump-Case
Drain hose
2-5
Pump-
Case
Drain-
Hose
Installation/
NDF
1. Install & NDF
Waste water
backward-flow
Continuous drainage
Drops a little
2-6
Drain
Hose
Clamp
Pulsator
Chassis
Project
Basic Model
Type
Top-Load
Hudson
WA400/422/456
Tub With Pump / Tact Button

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Step 1
①Over-connection of water supply hose using a tool
- The screw-head of water supply valve is loose due to
abrasion.
- Leakage occurs in the scratched part of the end of
water supply valve.
Step 2
①Water Supply Hose Unit Check
- Water leaks due to loose caulking.
- Check the water pressure: Shall not exceed max of
8kgf.㎠.
②Check for defect in installed sub-material unit.
- Check if internal Packing-Seal is omitted or worn out.
- Check for water leakage of Y-Joint Unit.
: Apply more Seal Taping to the water-supply-related
parts.
③If water leaks due to installation condition outside the
product, check Step#3.
Step 3
①Hose is bent during installation.
- Water leaks due to hose bending and friction caused
by the installation of product rear close to the wall.
- It is recommended that the gap between the product
rear and the wall be maintained at 6in(152㎜).
②Water leaks due to backward-flow when installing
cold-water-only.
- Water leakage due to backward-flow phenomenon of
internal Drawer.
- Error occurs during hot water course; and thus explain
to the customer to install both hot and cold water.
※ Explain to the customer after SVC.
=> It is recommended that the installer re-install it such
that it does not influence on water leakage and
vibration.
Check Point Check the condition of Water-Hose.
Tip 2-1. Water-Hose & Connection Abnormality

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Step 1
①Check if the Filter of water supply hose is
clogged by foreign substance.
- Separate the Filter with a tool.
②Check for the clogging and clean the Filter.
- Clean it regularly to prevent accumulation of
foreign substance.
- Prevent the water leakage caused by valve.
Step 2
①Check the exterior of water supply valve unit.
- Check if the screw-head is worn out due to over-
connection of water supply hose using a tool.
- Check for the scratch at the end of water supply
valve in the process of installation.
②Check for the water leakage part of water supply
valve.
- Water leaks due to continuous water supply
because foreign substance enters inside.
- Water leaks due to damaged body of water
supply valve.
- Water leaks due to bad Packing connection.
③If noise or operation is not normal, check Step #3.
Step 3
①Water Suply Valve Body Damage
- The body of water supply valve is damaged due
to cold temperatures.
※ Explain to the customer after SVC.
Explain to the customer to re-install the product
such that it is not influenced by cold
temperatures
Check Point Check the Water-V/V & Connection.
Tip 2-2. Water-V/V & Connection Abnormality

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Step 2
①It scatters outside according to the angle of
Nozzle.
- Adjust it if the angle of assembly is warped.
- Waterjet scatters to Burr of the plane inside
Nozzle. -> Replace.
②Bleach Leakage-Point
- Apply Bond to Section A-A’.
- Replace the Case-Bleach(U).
③Detergent Leakage-Point
- Check if powder is mistakenly used in drawer
for Liquid detergent.
Step 3
※ Detergent & Bleach backflows out of Tub.
①Check the water pressure environment to
maintain the appropriate pressure.
: Shall maintain the water pressure at 1kgf.㎠or
over.
: Clean the Filter of water supply valve regularly.
②Laundry input
- If too much laundry is input, it scatters during
water supply or circulation(cycle) pumping.
- It is recommended that laundry net be used
for the laundry which tends to move to the top,
such as bedding, etc.
③Check the level installation condition of product.
- If the product inclines to the rear side, it is
vulnerable to Detergent leakage.
Check Point Check the condition of Detergent & Bleach.
Tip 2-3. Detergent & Bleach Abnormality
Leakage-Point Section A-A’
OK

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Step 1
①Check for the water leakage phenomenon of
water level hose.
- Water level hose inserting part damage
②Water level hose separation or assembly
omitted.
③Re-assemble the water level hose and apply
Bond.
- Assemble the Clamp.
Step 2
①When aquajet is working, check for the
overflow.
- Check if internal packing is omitted.
- Replace the screw fixing Tub-Cover top with
more improved sample.
②Check for the water leakage part of tub.
- Water leaks due to Cap trap welding.
- Crack caused by unmelted injection at the Tub
bottom.
Step 3
①Tub below 100mm point damage
- Damage usually occurs at the point 100mm
below the tub during high-speed spinning
mode due to coin and foreign substance in the
laundry.
②Check the customer usage condition and
explain to the customer how to use it
properly.
- Explain how to remove coin and foreign
substance in the laundry.
Check Point Check the condition of Tub & Aquajet.
Tip 2-4. Tub Abnormality

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Step 1
①The structure of Pump-Case Tub bottom
connection is damaged or separated.
- Structure of Pump-Case assembly at the Tub
bottom
(Portion produced before Dec 10, 2012)
②Replace the damaged Pump-Case and fix
wire.
- Insert the taping into hook of wire.
- Bind it with Cable Tie, since the wire
separates and breaks due to continuous
vibration.
Step 2
①Check for the water leakage of Drain-
Hose(o).
- If water droplet forms, check for crack or
tearing.
- Replace the Drain-Hose(o).
②Check for the water leakage of Pump.
- Check the water leakage phenomenon of
Pump.
- Replace the Assy of Pump-Case.
③Check for the water leakage of Pin-Hole and
binding part of drain hose.
Check Point Check the condition of Pump & Hose.
Tip 2-5. Pump Connection Abnormality

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Step 1
①Waste water flows back into the washer.
②Drain hose is installed to deep in the stand
pipe in a basement. Thus, waste water
discharged from first floor flows back into
the product.
③As in photo, place the drain hose so that drain
hose may not go back to the upper part of
U-trap.
Step 2
①Water drains during washing mode.
②If drain hose is installed after loosening the
fixing part, then water drains continuously.
③As in the warning label, re-install it without
disassembling the drain hose fixing part.
Then, explain how to use it.
Step 3
①If water drop falls little by little even after
washing mode ends,
②Explain to the customer that the water
remaining in the detergent drawer drops due
to impact when disassembling it.
Check Point Check the condition of Install & NDF.
Tip 2-6. Install & NDF Connection Abnormality
Re-install the drain hose which
flows back to the U-Trap of pipe.

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#3. Symptom : Water Supply & Drain
3-1. Schematic Diagram of Repair
Check-1
Cause
Check-2
Tip
Code
Block
# 1
# 2
# 3
Power
Supply
1.No power
Power-Cord
breakage
Fuse breakage
EMI-Filter breakage
Main-Harness defect
3-1
Power-
Cord
EMI-Filter
Harness
Water Supply
Fail
1. Water Supply
Fail
Install close to wall
Water valve check
Cold/Hot water
switched
Clean foreign
substance in pipe
filter
Valve coil resistance
PBA applied voltage
3-2
Installatio
n
Valve
Damage
PBA
2. Weight
sensing defect
Weight sensing
reduce
Motor unit
constraint
Load
3-3
Washing
Motor
Hall
Sensor
PBA
3.Water level
sensing defect
Water level hose
Punk
Water level hose
clogged
Water level sensor
wire breakage
Water level
frequency check
3-4
Water
level
hose
Water
level
sensor
Detergent
Drawer
Residue
1. Detergent residue
If water remains
If detergent remains
Gel-type or highly-
enriched detergent
3-5
Detergent
Rinse
Bleach
Drain Fail
1. Pump check
Nd Error check
Pump-Case damage
Pump Wire breakage
Drain hose clogged
with foreign
substance
3-6
Pump
damage
Wire brea
kage
Foreign
substance
clogging
Chassis
Project
Basic Model
Type
Top-Load
Hudson
WA400/422/456
Tub With Pump / Tact Button

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Step 1
①Unit does not come on.
- Measure the power of socket and check if it is rated.
②Check the Power-Cord.
- Terminal deformation
- Check if the exterior is corroded.
Step 2
①Check for an open fuse.
- Replace the fuse if it is open
- Replace it with the rated capacity.
②Check for the wire breakage defect in EMI-Filter.
- Check for the contact fail due to reverse insertion
of Housing.
- Check if the terminal pin is pushed back.
- Check if the internal wire is broken.
③Measure the voltages of both ends of the EMI-
Filter.
☞Maintain the voltage of 120V –If NG, replace the
wire.
☞Maintain the voltage of 120V –If OK, check Step #3.
Step 3
①Check the AC power supplied to PBA.
②Blue↔White of CN1: Check if it maintains the voltage
of 120V.
☞Maintain the voltage of 120V –If OK, replace the
PBA.
☞Maintain the voltage of 120V –If NG, replace the
wire.
Check Point Check the condition of Power Cord/Fuse/EMI-Filter.
Tip 3-1. No Power Abnormality

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Step 1
①Check if water supply fails due to hose bent during
installation.
- Water supply fails due to hose bending and friction
caused by the close-to-wall installation of the
product rear.
②If the filter is clogged due to pipe problem or
water quality problem,
- Separate the filter with a tool.
- Clean the Filter with a brush.
Step 2
①Check the condition of water supply valve
connection.
- Check if the terminal pin is pushed back.
- Check if Harness wire is broken.
②Check the exterior of valve.
- The solenoid does not sit flush on the valve body.
- Crack in the valve body.
③Check the resistance of both ends of water supply
valve.
☞Maintain the coil resistance at 1.0㏀-> If O.L,
replace the valve.
Step 3
①Check the power supplied from PBA.
- Press and hold Spin+Soil, while pressing the power
button=> Test Mode
- Turn knob to select tS mode.
- Push Temp 4 times to work the valve.
- Turn on all the LED lights to measure the power
supply of water supply valve.
②Check the applied voltage of both ends of the
water supply valve.
☞Maintain the supplied voltage of valve at 120V. If
NG, replace the PBA.
Check Point Check the Water-Hose / Water Supply Valve / Install Condition.
Tip 3-2. Water Supply Fail Abnormality

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Step 1
①Check the water level by sensing weight with empty tub.
- Normal Course: approx. 80mm
- Other Course or Soil-Level : approx. 100mm
②Explain to the customer how to use it.
- Explain that either Other course or Soil is recommended
because they correct the water level based on the
absorption power of load.
Step 2
①Wrong weight-sensing due to washing motor stator
defect
- Separate the Cover-Panel from product.
- Separate the 9Pin housing to measure the Female
terminal.
- Motor Coil Resistance
☞3-phases of Coil U↔V↔W : 9.8±2Ω
- If coil value open defect, check the terminal pin.
②Incorrect weight-sensing due to the abnormality of
Washing motor rotor.
- Constraint occurs during operation because the
surrounding iron powder enters due to the magnetism
of Rotor-Magnetic. Thus, wrong water level is sensed.
③Incorrect weight-sensing due to defect in Hall Sensor
characteristics
- Check of ⓐ-VCC(RED)
☞The Voltage : approximately 5.0V
- Check of ⓑ-U(BLU) / ⓒ-V(ORG)
☞The Voltage : approximately 0~1v Pulse
※ Rotor slow turning by manually
※ ⓓ-GND(GRN) –Contact to (-)Black Tester
☞Replace the Main PCB
Step 3
①Check the Wash Motor Supply Voltage of PCB
- Pin #1 / #2 / #3 of CN3 = DC 145v
(GND CN1 Black)
☞Replace the PBA
Check Point Check the condition of Motor weight-sensing.
Tip 3-3. Weight-Sensing Abnormality
①②
CN3 1-U 2-V 3-
W
Normal course
Other course
③
0↔1v
④
ⓓⓐ
ⓓ
ⓐ