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.

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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 is loose due to
over-connection.
Packing omission
Y-Joint Seal leakage
Cold water alone
installation
Wall-attached
installation
2-1
Water
supply
hose
Water
supply
valve
Y-Joint
2.Water-V/V
leakage
Foreign substance
enters pipe.
Nozzle-Connector
Body damage
Packing assembly bad
Freezing in the winter
2-2
Water
supply
valve
Water
supply
hose
Pipe
Water Leakage
1. Detergent
drawer leakage
Wrong powder used
Hose
separation/friction
Detergent drawer does
not open/close
smoothly.
2-3
Nozzle
Detergent
2.Tub-related
leakage
Heater assembled
wrong
Tub damage
Diaphragm leakage
User wrong usage
2-4
Tub
Heater
Diaphrag
m
3.Pump leakage
Pump-Drain hose
Pump-Case
Drain hose
Handle-Filter
2-5
Pump-
Case
Drain-
Hose
Installation/
NDF
1. Install & NDF
Dirty water flows
backward
Continuous drainage
2-6
Water
supply
hose
Clamp
Chassis
Project
Basic Model
Type
Drum
Potomac
WF393/395/405
Front-Load / Power Foam

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Step 1
①Check the exterior of water supply valve unit.
- Check if screw head is worn out due to over-
connection using water supply hose tool.
- Check if the end of water supply valve is scratched
in the installation process.
Step 2
①Check the water supply hose unit.
- Water leaks due to loose Caulking.
- Water pressure check: Shall not exceed 8kgf.㎠max.
②Check if sub-material unit installed is defective.
- Check if internal Packing-Seal is omitted or worn
out.
- Check if water leaks from Y-Joint unit.
: Apply more Seal Taping to water-supply parts.
③If water leaks due to installation environment outside
the product, check out Step 3.
Step 3
①Hose is bent during installation.
- Since the product rear is too close to the wall, hose
is bent and friction occurs. Thus, water leaks.
- 6 in(152mm) is recommended for the distance
between the product rear and the wall is
recommended.
※ Explain to the customer after SVC.
=> Install it again such that it does not influence water
leakage and explain how to use it.
Check Point Check the condition of Water-Hose.
Tip 2-1. Water-Hose & Connection Abnormality

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Step 1
①Check if water supply hose filter is clogged.
- Separate the filter with a tool.
②Filter-clogging check & cleaning
- Clean it regularly to prevent the accumulation of
foreign substance.
- Prevent the water leakage caused by oil-filled valve.
※ When foreign substance enters through pipe, clean
the pipe and recommend to the customer that
another filter be installed.
Step 2
①Check if water leaks from Nozzle-Connector.
- The valve preventing backward-flow is damaged by
outside impact. Thus, check the water leakage.
- Water leaks a little due to separation of internal
Packing.
②Check for water-leaking part of water supply valve.
- Water leaks due to continuous water supply
because foreign substance enters inside.
- Water supply valve body is damaged; and thus
water leaks.
- Packing is not connected properly, and thus water
leaks.
③If the noise or operation is not normal, check step #3.
Step 3
①Water supply valve Body Damage
- Body of water supply valve is damaged due to
outside air in the winter.
※ Explain to the customer after SVC.
Re-install it such that it is not influenced by outside
air in the winter and explain to the customer how
to use it.
Check Point Check the condition of Water-V/V & connection.
Tip 2-2. Water-V/V & Connection Abnormality

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Step 1
①Check if water supply valve filter is clogged.
- Reduction in flow velocity results in clogging
from detergent residue.
②Detergent Leakage-Point
- Check if powder is used in liquid-detergent
drawer.
- Detergent dispenser is clogged due to using too
much powder, which causes front water leakage.
③Explain to the customer regarding detergent.
Step 2
①Check if hose is separated from Nozzle
connecting part.
- Check if it is separated when hand-pulled.
- Make connection after washing the oil substance
out the hose.
②Abrasion of detergent U-trap hose
- Make the hose ring connecting part located at
the end.
③Check for jamming phenomenon when
opening/closing detergent drawer.
- When jamming occurs during opening/closing,
Siphon phenomenon of fabric softener occurs
due to impact.
- Check if rear projection is separated and insert
Hook.
Check Point Check the condition of Detergent & Bleach.
Tip 2-3. Detergent & Bleach Abnormality
※ Detergent residue
due to powder input
※ Clogging due to
Too much Powder

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Step 1
①Check if water leaks from the Heater.
- Water leakage due to unconnected heater
- Water leaks a little due to incomplete heater
connection.
☞Connection Spec : Shall maintain 4~8mm.
If washing heater is not assembled properly,
water leaks from bottom as soon as water
is supplied.
Check it and if needed, re-assemble it
tightening the nut with M10 tool.
②Check for water leakage due to tub damage.
Step 2
①Check for the water leakage of Diaphragm.
- Adhesion reduces due to one-sided
connection of Diaphragm.
②Order of Door water leakage check
. Check if the rear shipping bolts are
removed.
. Check after running 3 cycles in normal
course.
. Remove wire from the front Diaphragm and
re-assemble.
Step 3
①Water leaks from the Diaphragm of Door
bottom.
Case#1 –Water leaks due to hair & lint.
Case#2 –Damage due to pet dog & sharp
accessories
Case#3 –Jamming when laundry is put in.
②Check the customer usage condition and
explain how to use it.
Check Point Check the condition of Tub & Diaphragm.
Tip 2-4. Tub Abnormality
※ Clean hair. ※ Clean Door-Glass.
※ Water leakage
Due to unassembled
Heater.

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Step 1
①Hose Between Tub & Pump Drain
- Check for the connection of hose drain
connecting tub and pump drain.
- Check if water leaks due to damaged Hose
Drain.
②Pump-Case Damage
- Check for the connection
between tub & pump.
- Check if water leaks from pump of Case
- All hoses connecting to pump should
be checked.
③Drain-Hose Damage
- Check if there are holes on drain hose.
- Check for any leaks in the drain hose.
☞Check for the environment which causes
drain hose friction due to appliance vibration
at the rear.
Step 2
①Check if there is leakage at the debris filter
and the drain cap.
②Check parting lines and crack on pump case.
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 deep into the pipe of
product which is installed in the basement.
Thus, waste water discharged from first floor
flows back into the product.
③As in photo, distance 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
①Drain filter is not assembled properly when
opening/closing it.
②Sand & tiny foreign substance, etc. in laundry
accumulate in drain filter; thus, water is not
drained.
③Water leaks when opening/closing the Handle-
Filter because it is not assembled properly.
☞Explain how to assemble filter when
opening/closing it for cleaning.
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 pipe.
※ Filter assembled wrong

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#3. Symptom : Improper Operation
3-1. Schematic Diagram of Repair
Check-1
Step
Check-2
Tip
Code
Block
# 1
# 2
# 3
No -
Operation
1. No power
Power-Cord breaks.
Fuse breaks.
EMI-Filter breaks.
Main-Harness defect
3-1
Power-
Cord
EMI-Filter
Harness
2. No-Spin
Moisture-proof cloth
usage condition
Laundry recommended
use
Loose motor terminal
Hall sensor Pulse check
3-2
Laundry
Motor
Hall
Sensor
Washing
feature
1. No Water supply
Wall-attached installation
Water supply valve check
Wrong installation of
Cold/Hot water
Clean foreign substance
in Pipe filter
3-3
Water
supply
hose
installation
Filter
Water
supply
valve
2. Weight sensing
defect
Weight sensing course
Motor unit constraint
Laundry
3-4
Washing
motor
Hall센서
PBA
3. Water level
sensing defect
Water level hose
Puncture
Water level hose
clogging
Water level sensor
breaks.
Water level frequency
check
3-5
Water
level
hose
Water
level
sensor
Detergent
feature
1. Detergent residue
Water remains.
Detergent residue
Gel, highly-enriched
detergent
3-6
Detergent
Rinse
Bleach
2. Course water
supply check
Detergent, softener,
Bleach
Fast time Down check
3-7
PBA
Water-
V/V
Chassis
Project
Basic Model
Type
Drum
Potomac
WF393/395/405
Front-Load / Power Foam

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Step 1
①No-Power does not turn on.
- Measure the electric power of socket and
check if it is the rated one.
Step 2
①Measure the voltages of both ends of EMI-
Filter.
☞Input voltage measurement - AC120V NG :
Replace the Power-Cord.
☞Output voltage measurement - AC120V NG :
Replace the EMI-Filter.
Step 3
①Check AC power supplied to Main PBA.
- Measure AC voltages of Power Relay#1-d②
(WHT) & CN#6-①(BLU) terminals: AC 120V
☞OK -> Replace PBA.
☞NG -> Check the voltage of Sub PBA.
①Check DC power supplied to Sub-PBA.
- Measure AC voltages of CN#7-⑤(ORG) &
CN#7-⑥(BLK) terminals: AC 120V
☞OK -> Replace the Harness.
☞NG -> Replace the Sub PBA.
Check Point Check the condition of Power Cord/Fuse/EMI-Filter.
Tip 3-1. No Power Abnormality
※ Input voltage
measurement
※ Output voltage
measurement

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Step 1
※ Explain to NDF customers how to use it.
- Check the wrong usage condition of laundry
and explain the recommended use.
- Do not use Water–Proof Sheet, Mats, and
clothing.
Step 2
①Check if Motor Wire Pin
- photo of pin which had fallen out added
- Must check for contact fail due to opening of
Pin in the terminal.
②Hall sensor check
- Check of ⓑ(RED)/ⓒ(BLU) and ⓓ-GND(ORG)
☞The Voltage : approximately 0~1.2v Pulse
※ Rotor the slow turning by manually
Check Point Check the user usage/install condition for Unbalance and the motor condition.
Tip 3-2. No-Spin Abnormality
ⓓ
ⓐ
※ⓑ/ⓒ:0↔1.2v
.
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.