Samsung WA48H7400AP User manual

WASHING MACHINE (TOP-LOADING) CONTENTS
SERVICEManual
WASHING MACHINE
TOP-LOADING TYPE
Basic Name : WA48H7400AP
(WA-7000HA PJT)
Basic Code : WA45H7000AP/A2
Model Name : WA50M7450AP
WA50M7450AW
(WA-7400M PJT)
Model Code : WA50M7450AP/A4
WA50M7450AW/A4
1. Safety Instructions
2.FeaturesandSpecications
3. Disassembly and Reassembly
4. Troubleshooting
5. PCB Diagram
6. Wiring Diagram
7. Reference

CONTENTS
1. Safety instructions...................................................................1
1-1. Safety instructions for service engineers ...............................................1
2. FeaturesandSpecications ...........................................................5
2-1. Features........................................................................5
2-2. Specications ....................................................................6
2-3. Detail features ...................................................................7
2-4. Optionsspecications .............................................................8
3. Disassembly and Reassembly .........................................................9
3-1. Tools for disassembly and reassembly ................................................9
3-2. Standard disassembly drawings ....................................................10
4. Troubleshooting ....................................................................19
4-1. Error modes ....................................................................19
4-2. Corrective actions for each error code................................................23
4-3. The installation for leveling.........................................................27
5. PCB diagram.......................................................................28
5-1. Main PCB .....................................................................28
5-2. Detailed Manual for Connector and Relay Terminal Part - Main PCB ........................29
5-3. Sub PCB ......................................................................30
5-4. Detailed Manual for Connector Terminal Part - Sub PCB .................................31
6. Wiring diagram .....................................................................31
6-1. Wiring diagram .................................................................31
7. Reference .........................................................................32
7-1. Model Number Naming Rules ......................................................32

Safety Instructions _ 1
1. SAFETY INSTRUCTIONS
1-1. SAFETY INSTRUCTIONS FOR SERVICE ENGINEERS
► Besuretoobservethefollowinginstructionstooperatetheproductcorrectlyandsafelytopreventpossibleaccidents
and hazards while servicing.
► Twotypesofsafetysymbols,WarningandCaution,areusedinthesafetyinstructions.
WARNING Hazards or unsafe practices that may result in severe personal injury or death.
CAUTION Hazards or unsafe practices that may result in minor personal injury or property damage.
BEFORE SERVICING
• (When servicing electrical parts or harnesses) Make sure to disconnect the power plug before servicing.
4Failing to do so may result in a risk of electric shock.
• Do not allow consumers to connect several appliances to a single power outlet at the
same time.
4 Thereisariskofreduetooverheating.
• Whenremovingthepowercord,makesuretoholdthepowerplugwhenpullingtheplug
from the outlet.
4 Failingtodosomaydamagetheplugandresultinreorelectricshock.
• Whenthewashingmachineisnotbeingused,makesuretodisconnectthepowerplug
from the power outlet.
4 Failingtodosomayresultinelectricshockorreduetolightning.
• Donotplaceorusegasoline,thinners,alcohol,orotherammableorexplosivesubstancesnearthewashing
machine.
4 Thereisariskofexplosionandrecausedfromelectricsparks.
WARNING

2 _ Safety Instructions
WHILE SERVICING
• Checkifthepowerplugandoutletaredamaged,attened,cutorotherwisedegraded.
4 Iffaulty,replaceitimmediately.
Failingtodosomayresultinelectricshockorre.
• Completelyremoveanydustorforeignmaterialfromthehousing,wiringandconnectionparts.
4 Thiswillpreventariskofreduetotrackingandelectricalhazard..
• Whenconnectingwires,makesuretoconnectthemusingtherelevantconnectorsandcheckthattheyare
completely properly.
4 Iftapeisusedinsteadoftheconnectors,itmaycausereduetotracking.
• Make sure to discharge the PBApower terminals before starting the service.
4Failing to do so may result in a high voltage electric shock.
• Whenreplacingtheheater,makesuretofastenthenutafterensuringthatitisinsertedintothebracket-heater.
4 Ifnotinsertedintothebracket-heater,ittouchesthedrumandcausesnoiseandelectricleakage.
AFTER SERVICING
• Check the wiring.
4Ensure that no wire touches a rotating part or a sharpened part of the electrical harness.
• Check for any water leakage.
4Perform a test run for the washing machine using the standard course and check whether there is any water
leakagethroughtheoorsectionorthepipes.
• Do not allow consumers to repair or service any part of the washing machine
themselves.
4This may result in personal injury and shorten the product lifetime.
• Ifitseemsthatgroundingisneededduetowaterormoisture,makesuretorun
grounding wires.
(Checkthegroundingofthepoweroutlet,andadditionallygroundittoametallicwater
pipe.)
4Failing to do so may result in electric shock due to electric leakage.
[Running a grounding wire]
- Twist a grounding wire (copper wire) two or three times around the tap.
- Ifyouconnectthegroundingwiretoacopperplate,buryit75cmundertheearthina
place with a lot of moisture.
 Donotconnectthegroundingwiretoagaspipe,plasticwaterpipeortelephone
wire.Thereisariskofelectricshockorexplosion.
Grounding
terminal
75 cm
Copperplate
WARNING
WARNING

Safety Instructions _ 3
BEFORE SERVICING
• Do not sprinkle water onto the washing machine directly when cleaning it.
4 Thismayresultinelectricshockorre,andmayshortentheproductlifetime.
• Do not place any containers with water on the washing machine.
4 Ifthewaterisspilled,itmayresultinelectricshockorre.Thiswillalsoshortenthe
product lifetime.
• Donotinstallthewashingmachineinalocationexposedtosnoworrain.
4 Thismayresultinelectricshockorre,andshortentheproductlifetime.
• Do not press a control button using a sharp tool or object.
4This may result in electric shock or damage to the product.
WHILE SERVICING
• Whenwiringaharness,makesuretosealitcompletelysonoliquidcanenter.
4 Makesurethattheydonotbreakwhenforceisexerted.
• Checkifthereisanyresiduethatshowsthatliquidenteredtheelectricpartsorharnesses.
4 Ifanyliquidhasenteredintoapart,replaceitorcompletelyremoveanyremainingmoisturefromit.
• Ifyouneedtoplacethewashingmachineonitsbackforservicingpurposes,placeasupport(s)ontheoorandlayit
downcarefullysoitssideisontheoor.
4Do not lay it down on its front. This may result in the inside tub damaging parts.
CAUTION
CAUTION

4 _ Safety Instructions
AFTER SERVICING
• Check the assembled status of the parts.
4 Nowisagoodtimetoinspectyourwork.Reviewallconnectionsandwiring,includingmountinghardware.
• Check the insulation resistance.
4Disconnect the power cord from the power outlet and measure the insulation resistance between the power plug
andthegroundingwireofthewashingmachine.Thevaluemustbegreaterthan10MΩwhenmeasuredwitha
500V DC Megger
• Checkwhetherthewashingmachineisleveltheoorwithrespecttotheoriginalposition
of the washing machine prior to service.
By doing this now will reduce for the need of customer dissatisfaction and redo call.
4Vibrations can shorten the lifetime of the product.
CAUTION

FeaturesandSpecications_5
2. FEATURES AND SPECIFICATIONS
2-1. FEATURES
Features Description
The Great Capacity • Even bulky garments and blankets get super clean. The Great capacity
leavesenoughroomforamorethorough,cleanerwash.
DD Motor
• The power to handle anything! Our direct-drive inverter motor delivers power
righttothewashertubfromavariablespeed,reversiblemotor.Beltless
direct-drivemotorgeneratesahigherspinspeedformoree󰀨ective,quiet
operation.Thewasheralsohasfewermovingparts,meaningfewerrepairs.
Mist Shower • Aseparatenozzlehasbeenadoptedthatsprayswaterequallysothatthe
rinsecycleise󰀨ectiveevenwithasmallamountofwater.
VRT®
(Vibration Reduction Technology) • ThisSamsungwasherperformssmoothlyattopspinspeeds,minimizing noise and vibration.
Self Clean
(Tub Cleaning cycle)
• Clean your drum with one button! This Pure Cycle is specially designed to
removedetergentresidue&dirtbulidupinthetub,withouttheneedfor
special chemical detergents.
EZ-Closed Lid • The door is designed to close softly and prevent users from being injured
Smart Care • Samsung’sSmartCare,anautomaticerror-monitoringsystem,detectsand
diagnosesproblemsatanearlystageandprovidesquickandeasysolutions.

6_FeaturesandSpecications
2-2. SPECIFICATIONS
TYPE TOP LOADING WASHER
DIMENSION
(Inches / cm)
A. Height 43.9″/111.5cm
B. Width 27.0″/68.6cm
C. Height with Door open 58.1″/147.6cm
D. Depth 29.3″/74.4cm
WATER PRESSURE 20~116psi (137~800kPa)
WEIGHT 64kg (141.1 lb)
CAPACITY 5.0cu.ft
POWER
CONSUMPTION
WASHING 120V 700W
SPIN 120V 400W
DRAIN 120V 80W
SPIN REVOLUTION 800rpm
C
B
A
D

FeaturesandSpecications_7
2-3. DETAIL FEATURES
Grade WA50M7450A*/A4 WA48H7400AP/A2
Image
Main Spec.
Capacity(DOE) 5.0 4.8
AquaJetTM No Yes
Smart Care Yes Yes
Diamond interior drum Yes Yes
Self Clean Yes Yes
Washing Cycles 11 11
Internal Heater - -
VRT®Yes Yes
Pulsator material STS STS
Maxrpm
(Maxspinspeed) 800 1,100
Mist Shower Yes Yes
Motor DD DD
Design
Color Inox/Neat White Neat White
Main display 18:88 18:88
JogDial Chrome Chrome
LED color Ice-blue Ice-blue
Door Lid TC Tempered Tinted glass Tempered Tinted glass
Easy door Yes Yes
Top Cover Steel(EGI) + Painting Steel(EGI) + Painting
Energy
MEF (cf/kWh/cycle) 2.06 2.66
WF (gal/cycle/cf) 4.30 3.70
EnergyGuide
(kWh/year) 160 165

8_FeaturesandSpecications
2-4. OPTIONS SPECIFICATIONS
Item Item Name Code No. Remark
HANGER-HOSE DC61-00224A Default
USER MANUAL DC68-03776E Default
CABLE TIE 6501-000121 Default
ASSY CAP V.W DC97-18313A Default
Note
• CustomercanpurchaseWatersupply,drainhosesandassylegsupportfromaservicecenter.

Disassembly and Reassembly _ 9
3. DISASSEMBLY AND REASSEMBLY
3-1. TOOLS FOR DISASSEMBLY AND REASSEMBLY
Tool Type Remarks
Boxdriver 10mm
17mm
Tub(16),Fixerscrew(5),Motor(1),Balance(5)
Damper(2),Damper(friction1)
Double-ended
spanner 10mm
17mm
Replacedbyboxdriver
Leg
Vice pliers ATool for protecting empty turning of bolt or
abrasionfromusingboxdriver
For disassembly of Spin drum
Others
(screwdriver,nipper,
long nose pliers) Common tools for servicing
JIGfortheASSYSPIN
BASKET

10 _ Disassembly and Reassembly
3-2. STANDARD DISASSEMBLY DRAWINGS
► Thisisastandarddisassemblydiagramandmaydifferfromtheactualproduct.
Use this material as a reference when disassembling and reassembling the product.
Part Figure Description
Sub and Main PCB
Assembly
1. Remove the 6 screws holding the control
panel assembly.
2. Separate the both hooks. (Left and Right)
3. Separate the cover panel upward.
 Ifitisdi󰀩culttodisassemble,usethe(-)
driver to disassemble hooks.
(Be careful damage of hooks.)
4. Remove the 2 screws holding the control
panel assembly and turn the panel over.
5. Pull the Encoder-Knob to separate it and
thenremovethe4xingscrews.
 WhenreassemblingthePCB,takecare
that you do not damage the control-panel
xinghook.AfterreplacingthesubPCB,
check the key operation.
6. Separate the cover pcb(m) and the wires
connected to the main PBA.
 Afterreassemblingthehousing,check
if the wires are properly connected.
When disassembling and reassembling
thehousing,takecarethatyoudonot
damage the part.

Disassembly and Reassembly _ 11
Part Figure Description
Water Valve
1. Afterseparatingthecontrolpanel,separate
the water-valve housing.
2. Removethe3xingscrews.
3. Remove the wire-harness and release the 2
clamps connecting the hoses.
 Whenreleasingtheclamps,takecare
that you do not tear the hoses.

12 _ Disassembly and Reassembly
Part Figure Description
Door Assembly 1. Remove the 2 inlay tapes.
2. Remove the 4 screws holding the door
lid TC and separate the door.

Disassembly and Reassembly _ 13
Part Figure Description
Top Cover Assembly
/ Door Switch
1. Remove the 2 screws from the cover
plate.
2. Separate the control panel assembly.
3. SeparatetheAssyValveWater,themain
PBA,theAssySensorPressureandthe
lterEMIhousing.
Separate the housing to prevent
stress and damage to the wire-
harness.
4. Separatethemainwireharness,the
pressureswitchhoseclip,Grounding
screw .
5. Release the bleach hose clamp.
6. Separate the top cover assembly by
lifting and pushing ahead the top part of
the assembly.
7. you can check the door switch If turn the
Top cover upside down.
Sensor Pressure
Switch
1. Disassemble the control panel assembly.
2. Separate the pressure switch housing.
3. Beforeseparatingthehose,releasethe
clip.
 Whenreleasingtheclip,takecare
that you do not tear the hose.

14 _ Disassembly and Reassembly
Part Figure Description
Drain-Pump
1. Separate the back cover
2. Separate 2 clamps.
3. Remove the 13 screws in base.
4. Remove the 3 screws
5 screws are separated by ‘+’ shape hand
driver.
Thermistor 1. Remove the 2 screws.

Disassembly and Reassembly _ 15
Part Figure Description
Clutch Assembly
(continued)
1. Separate the top cover assembly by
lifting and pushing ahead the top part of
the assembly
2. Remove the 2 screws holding the panel
control Separate all the wires connected
to the housing.
3. Removethe4screwsxingthetub-
cover and separate the tub-cover.
4. Separate the pulsator-cap by inserting
the tip of a (-) screwdriver between the
pulsator-cap and the pulsator and then
liftingthescrewdriverup(↑).
5. Remove the bolt holding the pulsator
with a 10mm wrench.

16 _ Disassembly and Reassembly
Part Figure Description
Clutch Assembly
(continued)
6. Remove the shaft with the jig wrench.
- Release the nut in a clockwise direction.
- Fasten the nut in a counterclockwise
direction.
7. Place the main body so that the front
frame faces upward and remove the 4
bolts holding the saddle with a 10mm
wrench.
When you place the washer on
theoor,takecarethatyoudonot
damage or scratch the product.
8. Remove the bolt holding the DD-motor
housing with a 17mm wrench and then
remove the motor housing.
9. Remove the 6 bolts holding the DD-
motor with a 10mm wrench.

Disassembly and Reassembly _ 17
Part Figure Description
Clutch Assembly
(continued)
10.Separate the 2 marked housings and
then remove the DD-motor.
11. Press the hook to separate the housing.
12.Separate the slide guide and the
coupling by pulling them forward.
Disassemble the coupling and the
spring.

18 _ Disassembly and Reassembly
Part Figure Description
13.Removetheallscrewsxingtheclutch
assembly and then separate the clutch
assembly.
Reassembly procedures are in the reverse order of dissasembly procedures.