Samsung Potomac-PJT WF393 Assembly instructions

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HA Repair Guide
Front-Load Washer
Potomac-PJT
WF393/WF395/WF405

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•Vibration
•Noise
Vibration
& Noise
•Water Leakage
Leakage
•Water Supply
•No Power
Improper
Operation
•Error-Mode
Error-
mode
•Test mode / Diagnosis
•Circuit Diagram / PBA
Appendix
Potomac-PJT Repair Guide
[ WF393/WF395/WF405]

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#1. Symptom : Vibration & Noise
1-1. Schematic diagram of Repair
Check-1
Step of Cause
Check-2
Tip
Code
Block
# 1
# 2
# 3
Set-Vibration
1.Spin-basket defect
Leg condition check
Ball-balancer oil-leakage
Weight-Balance
coupling
Spin-Basket
concentration
1-1
Balancer
Weight
Spin
concentra
tion
2.Damper defect
Diagnosis of Tub
movement noise
Hanger-Spring
separation
Damper separation
Loosening of Damper
coupling
1-2
Damper
Hanger
3.Unstable place
for installation
Floor moisture
environment
Installation in low-temp
environment
Dryer Pair installation
narrow
Rear hose interference
Floor shaking
1-3
Place of
installatio
n
Installatio
n environ
ment
4. Installation defect
Leg level installation
check
Non-Slip Pad Unattached
Moving Pad/Pan-Drain
1-3
Level
installatio
n
Non-Slip
Sheet
Installatio
n
Spin-Noise
1.Shaft & Frame
Rotor friction during
spinning mode
Tub Bearing rust
Frame friction
1-4
Motor
-Rotor
Tub-
Bearing
Frame
2.Motor defect
Spin-mode Stator check
Diagnosis of motor Coil
Hall sensor check
1-5
Motor
-Stator
Hall-S/S
3.Pump-Drain defect
Pump-Case Damage
Fixing bolt loosened
Foreign substance in
pump
Impeller Damage
1-6
Pump-
Case
Impeller
Foreign
Substanc
e
4.Wrong usage of
product
User uses moisture-
proof cloth
Wash little amount
Spin course only
1-7
Moisture-
proof
cloth
5.Product inherent
characteristics
Resonance RPM band
shaking
Shaking at the beginning
Tub Ball Noise
1-7
Resonanc
e
phenome
non
Balancer
Chassis
Project
Basic Model
Type
Drum
Potomac
WF393/395/405
Front-Load / Power Foam

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Step 1
①Check deformation of Leg of Frame bottom.
- Leg-bottom Rubber is damaged.
- Right angle is not maintained due to Leg Bolt
deformation.
②Adjust level installation of leg & inspect place
of installation.
- Refer to Level Product Installation Guide Tip 1-3.
Step 2
①Check Spin mode.
- Press Soil+Signal+Power to enter the
Test mode.
- Turn knob and select “SPn” to start.
- Check if Spin reaches Extra-High LED.
②Check Unbalance Test.
- Run Spin Test with 300g placed on one side
unbalanced.
※ 300g – 2 Towels OR Jig for this purpose only
- Check for abnormal noise & Set moving.
Step 3
①Oil leakage of Balancer
- Rotate Spin-Basket to check frictional noise
between balls.
※ If the frictional noise is dull, it is regarded as OK.
②Abrasion of Weight-Balancer
- Check if Weight-Balancer shakes.
- Gap is created if the screw head of fixing bolt wears
out.
- Couple more OR replace it.
③Check the concentration of Spin-Basket.
- Check if Spin-Basket moves up and down.
- Check if Spin-Basket vibrates due to broken fixing
bolt.
※ After SVC, explain to the customer how to use it.
①Check the use condition of Customer.
- Check if moisture-proof cloth is used.
: Water–Proof Sheet, Mats, clothing
Check Point Spin-Basket / Check the user environment condition.
Tip 1-1. Frame & Spin-Basket Abnormality

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Step 1
①Check Tub for abnormal noise.
- Shake the Tub back and forth to check where the
noise is coming from.
②Hanger Spring connection & Grease application
condition
- Check if grease is properly applied between
Hanger Spring and Hanger Guide friction part.
Step 2
①Check if Damper is separated or unassembled.
- If the bolts connecting damper
- If the dampers are rusted or not fastening,
☞replace.
②Check the condition of loosening of Damper
connection.
- The shape of connected part of Bottom-Plate is
defective, and thus it does not rotate properly.
- It does not rotate properly because it was
connected too much in the assembling process.
☞When it does not rotate properly, “Dda-dda-dda”
noise is generated due to friction between Damper &
Bottom-Plate. Thus, do as in ③.
③What to do when Damper connection is
loosened.
- Add Nut M10.
- Product Name: Nut-Hexagon (6021-001588)
※ Damper connecting force : 250 ~ 350kgf.㎠
Check Point Check the operating condition of Damper.
Tip 1-2. Damper & Hanger Abnormality

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Step 1
①Check if there are any shipping bolts
on the back of washer.
Shipping bolts should be removed & kept.
②When installing, check the frictional relationship
with the surroundings.
- Install a pair of dryers together, causing
interferential noise when the Frame shakes
during spinning mode.
③Check the installation levelness & Floor-moving
phenomenon.
Case #1 - The levelness, which is measured with
levelness-measuring apparatus, is poor.
Case #2 –It shakes due to old floor (lumber) of
laundry room.
☞Re-installation is recommended so that it does not
influence on vibration.
Step 2
①Check if pedestal is installed properly.
- In case of old pedestal, check if all bolts
connecting washer and pedestal are
tightened properly.
②Condition of levelness of Leg installation
- If the rubber of legs is damaged, replace it.
- Lower leg is better for vibration.
Shorten the leg height and lock up the legs
after adjustment.
- Check if washer inclines to one side and
level washer again with adjustment of legs.
③Environment with slippery floor (Tile, Moisture)
- Attach on-Slip Pad.
④Material which is inappropriate for Leg floor
according to rules.
Case#1 Frictional noise of Pan Drain
Case#2 Use floor protection as sub-material for the
Leg bottom.
☞Re-installation is recommended so that it does
not influence on vibration.
Check Point Check the installation place and stability condition.
Tip 1-3. Installation Place & Installation Stability Abnormality
※ Pedestal Damage
Case
※ Installation
Error Case

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Step 1
①Assembly Bolt of Washing Motor
- Check the assembly status of the bolt.
If the bolt is loose, tighten it.
②When there is abnormal noise, have the
Rotor disassembled for checking.
- When the weight sensor is operating, check
for frictional noise of washing motor while
Motor-L / Motor-R is rotating.
- Remove iron foreign substance, if any,
absorbed by Rotor Magnetic.
Step 2
①Jet Engine noise during spinning mode
- Push Soil+Signal+Power to enter the Test
mode.
- Turn knob and select “SPn” to start.
- Check if Extra-High LED of Spin is reached.
☞If the tub is rotating empty without load,
check the roaring sound during high-speed
rotation.
②In the case of abnormal noise or Bearing
abnormality, replace Tub-back.
Step 3
①Check frictional noise between parts of
Frame.
- Shake the Tub back and forth to check where
the noise is coming from.
②Inspect the main parts from which noise is
generated.
- Add sponge to frictional part of Frame-Front.
☞Add more sponge to noise-generating part.
Check Point Check the operating condition of shafting.
Tip 1-4. Shafting Abnormality

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Step 1
①Rotor with your hand and check the gap
- If the gap is not the same as in the photo
right,
- it could cause noise during the spin cycle
②Check if Motor Wire Pin fell out
- photo of pin which had fallen out added
- Must check regarding contact fail caused by
the opening of Pin inside the terminal.
Step 2
①Check of Resistance motor (U-V-W).
☞The Resistance : approximately 11Ω
②Check the Hall Sensor.
- Check of ⓐ-VCC(PNK) and ⓓ-GND(ORG)
☞The Voltage : approximately 5.0V
- Check of ⓑ-U(RED)/ⓒ-V(BLU) and ⓓ-
GND(ORG)
☞The Voltage : approximately 0~1.2v Pulse
※ Rotor the slow turning by manually
☞Replace the Motor
Check Point Check the operating condition of Motor.
Tip 1-5. Motor Abnormality
ⓓ
ⓐ
※ⓑ/ⓒ:0↔1.2v
.

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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.
②Check pump drain impeller is broken.
Step 3
①Check if the fixing part of Pump-Case is loosened.
- Check if the two bolts fixing Frame-Plate bottom
are loosened.
- Check if the fixing part of Pump-Case front is
loosened.
☞Assemble the Pump-Case again.
②One assembly part of Pump-Case front is loosened.
- Frictional noise is generated due to vibrating up
and down.
☞Assemble Pump-Case again.
Check Point Check the condition of Pump-Drain.
Tip 1-6. Pump Noise Abnormality

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Step 1
※ Explain to NDF customer.
- Check the wrong usage condition of laundry
and explain recommended usage.
- Do not use Water–Proof Sheet, Mats and
clothing.
Step 2
①Resonance phenomenon occurs in the rising
section during spinning mode.
- Resonance Frequency: 200~450rpm section
- In the resonance frequency, Tub moves.
※ It is a resonance phenomenon occurring in
the rpm rising section for water extraction at
the beginning, which is normal.
②Ball friction occurs when Spin-Basket
rotates in low speed.
- Explain that the frictional noise from the Ball,
which is the center of gravity in the Balancer,
is normal.
※ If the Ball in the Balancer makes strong
frictional noise while checking Tub, then it
means that the oil is leaking. Thus, replace
Spin-Basket.
Check Point Explain the NDF and product characteristics.
Tip 1-7. Explanation of NDF and product characteristics
Step 1 : Small Loads Case
: If loading the laundry whose weight is 1kg ±
0.5kg, it is easily inclined to one side.
☞Add more laundry to make it normal.
Step 2 : Unbalance of laundry
: Stop using Water–Proof Sheet, Mats and clothing.
☞Do not input the laundry listed above, since
water does not drain during high-speed spinning
mode, causing unbalance problems.
Step 3 : Unbalance of bedding, carpet, and etc.
: Bedding should be washed alone less than 3.5kg.
☞Solution: Roll up the bedding before putting
into washer.
※ Do not wash Cotton bedding, wool bedding
and mink blanket.