Samsung WF7450SAV, WF7450NAW Service manual

WASHING MACHINE DRUM TYPE

BASIC : WF-F1061

MODEL NAME : WF7450SAV

WF7450NAW

MODEL CODE : WF7450SAV/YLP

WF7450SAV/YLR

WF7450SAV/YLW

WF7450NAW/YLW

WF7450NAW/YLR

SERVICE

PRODUCT IMAGE THE FEATURE OF PRODUCT

1. QUICK WASH

2. DELAY START

3. HAND WASH

4. SILVER NANO(OPTION)

5. CERAMIC HEATER(OPTION)

Manual

Refer to the service manual in the itself (http://itself.sec.samsung.co.kr/) for the more information.

CONTENTS

1. PRECAUTIONS

1-1. SAFE PRECAUTIONS .......................................................................................................................................... 1

1-2. PRECAUTIONS UPON INSTALLATION ................................................................................................................ 2

2. THE FEATURE OF PRODUCT

2-1. SPECIFICATIONS .................................................................................................................................................. 5

2-2. OVERVIEW OF THE WASHING MACHINE .......................................................................................................... 6

2-3. THE COMPARATIVE SPECIFICATIONS OF PRODUCT ...................................................................................... 7

2-4. ACCESSORY AND OPTION SPECIFICATIONS ................................................................................................... 8

3. PRODUCT SPECIFICATIONS

3-1. OVERVIEW OF THE CONTROL PANEL ............................................................................................................... 9

3-2. PROGRAMME CHART ........................................................................................................................................ 10

3-3. MAIN FUNCTION .................................................................................................................................................12

3-4. TECHNICAL POINT ............................................................................................................................................. 15

3-5. DESIGNATION OF MAIN COMPONENTS .......................................................................................................... 18

4. ALIGNMENT AND ADJUSTMENTS

4-1. GENERAL ERROR FUNCTION ........................................................................................................................... 20

4-2. TEST MODE ......................................................................................................................................................... 22

5. ASSEMBLY AND DISASSEMBLY

5-1. TOOLS FOR DISASSEMBLY AND ASSEMBLY ..................................................................................................23

5-2. ASSEMBLY AND DISASSEMBLY ........................................................................................................................ 24

6. TROUBLE DIAGNOSIS

6-1. TROUBLE DIAGNOSIS ........................................................................................................................................ 33

6-2. PROBLEM CHECKING AND METHOD OF PCB ................................................................................................. 35

6-3. DETAILED DIAGNOSIS .......................................................................................................................................41

7. EXPLODED VIEWS AND PARTS LIST

7-1. EXPLODED VIEWS OF TOP(FRONT) ................................................................................................................ 42

7-2. EXPLODED VIEWS OF TUB ............................................................................................................................... 43

7-3. EXPLODED VIEWS OF CASE ............................................................................................................................ 44

7-4. PARTS LIST .........................................................................................................................................................45

CONTENTS

8. BLOCK DIAGRAM ...................................................................................................................................48

9. WIRING DIAGRAM

9-1. PCB ASSY’ LAYOUT ............................................................................................................................................ 49

9-2.CONNECTOR & RELAY TERMINALS DESCRIPTION (MAIN PCB) .................................................................... 50

9-3.CONNECTOR & RELAY TERMINALS DESCRIPTION (AG-KIT PBA OPTION) ................................................. 51

10. SCHEMATIC-DIAGRAM

10-1. ROLD (WF7450SAV) .......................................................................................................................................... 52

11. PCB CIRCUIT DIAGRAM

11-1. PCB CIRCUIT DIAGRAM ................................................................................................................................... 53

11-2. PCB CIRCUIT DIAGRAM (AG-KIT OPTION) .................................................................................................... 54

12. CIRCUIT DESCRIPTION

12-1. OVERALL SYSTEM ........................................................................................................................................... 55

12-2. AC INPUT & POWER CIRCUIT ......................................................................................................................... 56

12-3. DRIVING SYSTEM CIRCUIT ............................................................................................................................ 57

12-4. MOTOR CIRCUIT .............................................................................................................................................. 58

12-5. SENSOR DETECTION CIRCUIT ...................................................................................................................... 59

12-6. MOTOR TACHO INPUT SYSTEM .................................................................................................................... 60

12-7. SILVER NANO SYSTEM (OPTION) .................................................................................................................. 61

13. REFERENCE INFORMATION

13-1. MODEL NAME ................................................................................................................................................... 62

13-2. TERMINOLOGY ................................................................................................................................................. 63

13-3. FABRIC CARE CHART ......................................................................................................................................64

13-4. ELECTRICAL WARNINGS ................................................................................................................................. 64

13-5. Q & A ..................................................................................................................................................................65

1. Precautions

1-1. Safe Precautions

1. Do not allow the customer to repair the product. It may cause personal injury or product damage when the unit is serviced by unqualiﬁ ed personnel.

2. Disconnect power to the appliance before servicing. Be aware of the possibilities of an electric shock.

3. Do not use multi-plug. Power outlet may be overloaded causing the socket to overheat.

4. Check for any damage on power plug or power outlet. Replace it immediately if it has problem. (It may cause an electric shock or ﬁ re)

5. Make sure to earth the product. May cause electric shock.

6. Do not clean the product with water. May cause electric shock / ﬁ re or shorten product life.

7. The wiring harness should be free from moisture and connected properly during serving. It should be proof against any external force.

8. Remove any dust or dirt in the product, wiring section and connections during servicing. Protect against possibilities of ﬁ re due to tracking etc.

9. Check for any water trace on electrical parts, harness, etc. Replace the parts or wipe dry the water.

10.Check the assembled status of the parts after servicing. Check if the product is assembled in the same status as before servicing.

11.Be sure not to pull on the power cord but to unplug it by holding the plug. Beware of possibility of electric shock or ﬁ re when the power cord is damaged.

12.Unplug the power plug from the outlet when the washing machine is not used. Beware of possibility of electric shock or ﬁ re while lightening.

13.Do not use or put ﬂ ammable materials (including gasoline, alcohol, thinner etc) around the washing machine. Flammable materials may spark an explosion or ﬁ re.

14.Do not put a water containing bowl or wet laundry on the washing machine. It may cause an electric shock or ﬁ re, or shorten the product life when its water penetrates into the washing machine.

15.Do not install the washing machine in a place where it is exposed to snow or rain etc. It may cause an electric shock or ﬁ re and shorten the product life.

16.Do not press control buttons with pointed objects such as pins, needles, etc. It may cause an electric shock or other problems.

17.Check the washing machine is leveled horizontally on the ﬂ oor and is installed properly. Vibration may shorten the product life.

18.Make sure to use connectors when connecting wires. If wires are connected without connectors, it may cause a tracking ﬁ re.

19.When the washing machine is to be laid down for servicing, put a pad on the ﬂ oor and lay the product on its side slowly. If the wash machine is laid on its front, internal components may be damaged by the tub.

1-2. Precautions upon Installation

■ How to Remove Shipping Bolts

■ Precautions before Installation

1. Remove the screws by using the supplied spanner.

3. Fill the holes with the supplied plastic caps.

2. Remove the shipping bolts from the back of the unit.

4. Keep the shipping bolts and screws for future use.

The unit is quite heavy. So, make sure to have 2 or more personnel move it.

Install the unit at a place with a wall outlet easily accessible.

Make sure that the unit stands on a ﬁ rm and leveled ﬂ oor.

Keep the unit away from places in which it is freezing, especially in winter.

keep it away from direct sunlight or high humidity, and install it in a place with good ventilation.

Keep the unit away from heat appliances such as a heater.

■ Grounding

Ć Make sure to ground the unit to prevent electric leak- age or shock.

Ć With a grounded receptacle It does not need an additional grounding.

■ Water Drainage

Ć Hook the drain hose over the Wash Basin or Laundry Tub or plug the end of the drain hose into the Standpipe.

- Hook the drain hose over the Wash Basin or Laundry Tub or plug the end of the drain hose into the Standpipe.

- The outlet end of the drain hose must be at least 60-90 cm above the base of the machine.

Ć Seal the drain pipe connections.

- If not, it may cause water leakage.

Ć Prevent water from siphoning away.

- If the end of the drain hose is put in water, it could siphon away water during washing. So, make sure that the end of the drain hose is not put in water.

 Note: Caution must always be exercised to avoid collapsing or damaging the drain hose. For best performance the drain hose should not be restricted in any way, through elbows, couplings or excessive lengths.

utionon

■ How to Level the Unit

1.Select an installation place. Install the unit with 10cm or more clearance from its surrounding walls.

2.Check if the unit is leveled. If the unit wabbles, adjust the leveling legs.

3.Adjust the leveling legs.

The 4 leveling legs should touch the

ﬂ oor all together.

After adjusting the leveling bolt, tighten the

lock nut by turning it clockwise.

When the unit is not leveled

Lift up the unit a little bit and adjust the shortest. Turn the leveling bolt counter clockwise as shown in the picture above (The leveling leg gets longer.)

Lock Nut

Leveling Bolt

Spanner

Flat Head Screwdriver

uti

Tighten the lock nut after

the leveling. If not, it

could generate vibrations &

noises.

2. THE FEATURE OF PRODUCT

2-1. SPECIFICATIONS

WASH TYPE FRONT LOADING TYPE

MODEL NAME WF7450SAV,WF7450NAW

DIMENSION

WATER PRESSURE 50 kPa ~ 800 kPa

WEIGHT

WASH and SPIN CAPACITY 4.5 kg (DRY LAUNDRY)

WASHING AND HEATING

SPIN

PUMPING 34 W

WATER CONSUMPTION 43ℓ(STANDARD COURSE)

SPIN REVOLUTION

PACKAGE Wt

MODEL WF7450SAV,WF7450NAW rpm 1000 PAPER 2.5kg PLASTIC 1.0kg

PANEL CONTROL

NET W 598mm X D 400mm X H 844mm

GROSS W 668mm X D 530mm X H 890mm

NET 55 kg

GROSS 58 kg

220V 1900W

240V 2200W MODEL WF7450SAV,WF7450NAW 220~240V 230W

COVER TOP

DRAWER

DOOR GLASS

BASE COVER

DEBRIS FILTER

DRAIN HOSE

POWER PLUG

ADJUSTABLE LEG

EMERGENCY DRAIN TUB

2-2. OVERVIEW OF THE WASHING MACHINE

CONTROL PANEL

SSY-DOOR

DRAWER

WATER SUPPLY VALVE

AG-KIT PCB

SENSOR PRESSURE

TUB

ADJUSTABLE LEG

DRAIN HOSE

ASSY PUMP

POWER CORD

BUFFER SPRING

WEIGHT-BALANCE

PULLEY

BELT

MOTOR

SHOCK ABSORBER

2-3. THE COMPARATIVE SPECIFICATIONS OF PRODUCT

THE COMPARATIVE SPECIFICATIONS OF PRODUCT˄ϔ˅

Item 4.5kg Old (4.5kg)

Model Name WF7450SAV WF-F1061

Capacity (Washing) 4.5kg 4.5kg

Drum Capacity 43ℓ 43ℓ

Washing Motor HXGP2I HXGP2I

Supply/Drain All temperatures /Drain pump Cold /Drain pump

Balancer Weight Weight

SIZE(W*D*H) 598*400*844 598*400*844

THE COMPARATIVE SPECIFICATIONS OF PRODUCT˄Ѡ˅

4.5kg

Model Name

Water-level Control O O

Add Laundry X X

Exterior Replacement

Part Name

WF7450SAV WF7450NAW

Function

Speciﬁ cations

Design

Cover Door

FRAME FRONT

SILVER WHITE

2-4. ACCESSORY AND OPTION SPECIFICATIONS

ITEM DESCRIPTION CODE-NO. Q’TY REMARK

HOSE-WATER(C) DC62-10289C 1

BOLT-SPANER DC60-40146A 1

CAP-FIXER DC61-10688A 5

CAP-FIXER DC67-00208A 1

HOSE-HANGER DC62-10278A 1

3. PRODUCT SPECIFICATIONS

3-1. OVERVIEW OF THE CONTROL PANEL

ķǂǂǂǂǂǂǂǂǂĸǂĹǂĺǂĻǂǂļǂĽǂľǂǂĿ

1. Detergent dispenser

2. Display panel Displays wash cycle and error messages. During execution of the program, the program indicator blinks.

3. Program selection button Press the button repeatedly to select one of the eight available wash button. Cotton Synthetics Wool Rinse+Spin Baby cotton Handwash Quickwash Spin.

4. Temperature selection button Press the button repeatedly to cycle through the available water temperature options. (Cold water 30 C 40 C 60 C 95 C). When pressing this button during washing, you can see the selected temperature in the diaplay panel.

5. Spin selection button Press the button repeatedly to cycle through the available water temperature options.

WF7450SAV,WF7450NAW Rinse hold,No spin,400,800,1000rpm

No spin The laundry remains in the drum without being spin after the ﬁ nal drain. Rinse hold The laundry remains soaking in the ﬁ nal rinse water. Before the laundry can be unloaded, either “Drain” or the “Spin” program must be run.

6. Function selection button Press the button repeatedly to cycle through the available partial wash options. Prewash Rinse+ Rinse Hold Ag+.

7. Delay start selection button Press the button repeatedly to rotate between the retarded start options avaiable. (from 3 hours to 24 hours, in 1 hour increments.)

3-1. OVERVIEW OF THE CONTROL PANEL

8. Start/Pause selection button Press to pause and restart programs. Press the start/pause button before adding laundry. This can only be selected within 5 minutes of the start.

9. On/Off button Press once to turn the washing machine on, press again to turn the washing machine off. If the washing machine power is left on for longer than 10 minutes without any buttons being touched, The power automatically turns off.

What is the “Child Lock” function

-If you press the “Child Lock” button (rinse+spin) longer than 2 sec during operation, this function is selected.

-If once this function is selected, no change can be done until the end of laundry.

-Press the “Child Lock” button (rinse+spin) longer than 2 sec to cancel the function. Note: Check out the Child Lock button ﬁ rst when no button is activate while the washing machine is working.

3-2. PROGRAMME CHART

PROGRAM

Cotton

Colour Syn-

thetics Wool Hand-

wash Quick

PROGRAM Cotton Colour

Synthetics

Wool Handwash Quick

Max load

(kg)

WF7602SAV

WF7600NAW

6.0 5.2 4.5 95 1200 1000

6.0 5.2 4.5 60 1200 1000

3.0 2.5 2.5 60 800 800

2.0 1.5 1.5 40 400 400 - √

3.0 2.0 2.0 60 1200 1000 - √

WF7520SAV

Averagely or lightly soiled cottons, bed linen, table linen, underwear, towels, shirts, etc. Averagely or lightly soiled cottons, bed linen, table linen, underwear, towels, shirts, etc. Averagely or lightly soiled blouses, shirts, etc., Made of polyester(diolen, trevira), polyamide (perlon, nylon)

or other similar blends. Only machine washable woolens with pure new wool label. Very light wash couse like hand wash. Lightly solied cottons or linen blouses, shirts, dark coloured terry cloth, colourd linen articles, jeans, etc.

WF7450SAV

WF7450NAW

Max

temp

(ć)

Spin Speed

(MAX)rpm

WF7602SAV

Type of WASH

WF7600NAW

WF7520SAV WF7450SAV

WF7450NAW

wash

Detergent

And additives

Pre

wash

γ γ

ender

√

De-

soft-

lay

start

γγ γγ

γγ

γγ γγ

γγ

Cycle

Time (min)

126

1. Programme with prewash lasts approx. 15 minutes longer.

2. The programme duration data has been measured under the conditions speciﬁ ed in Standard IEC 456.

3. Consumption in individual homes may differ from the values given in the table due to variations in the pressure and temperature of the water supply, the load and the type of laundry.

3-3. MAIN FUNCTION

1) Auto power S/W off function

● After power on, the auto power S/W off function automatically switches power off for you if you do not

press selection button for 10 minutes.

● After selecting the function, the auto power S/W off function automatically switches power off for you if

you do not press start/pause button for 10 minutes.

● until 5 minutes past, After ﬁ nishing the last function, the auto power S/W off function automatically

switches power off for you if you do not re-select the course button or manual button.

2) Door open function

● Door just can be opened at water level 24.05 KHz over, water temperature 55ć below, motor off, if

power is off door is not opened (only auto-door model).

● If door is open during the operating, all operating is halted, and door error message will be displayed

(2-digit panel displays “dE” 4-digit panel displays “door”) and error melody will coming out .

● Door open error can be cleared by closing the door. the operating keeps going on.

3) Rinse hold function

● If rinse hold function selected, the operating is ﬁ nished , the machine do not drain the water after last

rinse.

4) No spin function

● If no spin function selected, the operating is ﬁ nished after last rinse.

5) Drain function

● Drain function is over, after pumping out the water for 2 minutes , without motor rotating.

6) Pre-washing function

● Pre-washing function can be selected ,when you choice the following mode; cotton, coloreds, syn.

thetics, delicates, baby cotton, baby coloreds, baby delicates, baby stains.

● Water level/reverse time is the same with the selected course.

● Pre-washing takes about 16 minutes.

7) Power-out compensation function

● If power is out on selected process, the process before power out is stored to EEPROM, once power is

back the process before power out continues.



● When power is back, washing process starts from the process at the point of the power out, rinse/drain process starts from the initial process.

POWER-OUT COMPENSATION FUNCTION PROCESS

START WASHING

POWER OUT

SAVE DATA to EEPROM

POWER BACK

MICOM RESTORE

RINSE/DRAIN

START

SAVE DATA

to EEPROM

RINSE/DRAIN

PROCESS

POWER OUT

POWER BACK

MICOM RESTORE

FINISH

8) Fuzzy washing function (weight-sensing)

● After ﬁ nishing initial water supply, when the fall of the water level needs supplementary water supply, Sensing function perceives the weight with the supplementary water supply numbers and starts to

work. Under the course of Cotton, or Coloureds, if the supplementary water supply numbers become over 2 times the function is going at default condition ( high water level ), if 1 time that is going at middle level, if 0 below low water level, heating hours and rinse hours depend on the above data.

ECO PRE mode is selected, the process going on at default condition.

Washing hours

Cotton Coloureds

Rinse water level

High Default Default Default

Middle Default-20 min Default-10min 23.80KHZ

Low Default-30 min Default-15min 24.10KHZ

ĆAfter sensing weight, above hours is decreased from above default hours

9) Bubble - detecting function At the each condition of washing&dehydrating , rinse&dehydrating , hydrating, bubble -detecting function works, this function works 5times normally, if the function detects bubbles at 6 times , the bubble-detecting function

stops and go on to the next process.

● The bubble-detecting function during washing & dehydrating to rinse & dehydrating after 2 times instant dehydrating and before main dehydrating, if the water level is under 24.50KHZ, Bubble → Detecting function thinks there are bubbles and add the bubbles-removing rinse, needing hours are above hours and 8 Min 40 sec. → The bubble-detecting function during single hydrating process after 2 times instant dehydrating and before main dehydrating , if the water level is 24.50KHZ below or during main dehydrating, water level data is 24.50KHZ below Bubble-detecting function thinks there are bubbles and add the bubbles-removing rinse 1 times, needing hours are above hours and 5 min 50 sec.

Bubble-detecting function operating process

18 sec

laundry scattering

draining &reverse

50 sec

unbalance

detecting range

500rpm

220rpm

bubble detection

(default water level 24.50KHZ below)

10) Unbalance detecting & laundry balance positioning system ķ Just before the hydrating process and just after reversal rotation for balancing laundry position, this function is carried out ĸThe initial 6 sec is the period of reversal rotation for balancing laundry position , Drum rotates 50rpm for initial 6 sec Ĺ Next 12 sec, the rotation increases the speed from 50 rpm to 95 rpm slowly ĺ During the next 8 sec, drum rotates at the speed of 95 rpm, the sensor decides the degree of laundry unbalance with TACHO data which is attached to motor Ļ If the degree of unbalanced laundry is over 6 times to default value, laundry balancing system carryies out feed back process 3 times.

Unbalance detecting & laundry balance positioning system

410rpm

500rpm

220rpm

9sec

laundry scattering

unbalance

detecting range

95rpm

11) R.P.M control The rotating motor enables the magnetics( i.e generator) to generate magnetic ﬂ ux in proportion to

r.p.m, magnetic ﬂ ux induced by coil sensor in the opposite side produces the wave like the ﬁ gure below to dΦ/dt and via rectangular wave generating circuit, the waves reaches MICOM and micom controls r.p.m with the pulse, count and cycle inputted by program.

V (VOLT)

T (HOUR)

3-4. TECHNICAL POINT

1) Motor on/off time at each course

unit:sec

Course

Cotton 13 4 13 4 50 Coloureds 12 8 12 8 50 Synthetics 10 5 10 5 50 Delicates 5 10 5 10 50 Wool 2 48 2 48 50 Handwash 258258 50 Quick 22 4 22 4 50 Bed Linen 10 10 10 10 50 Heavy Soil 12 8 12 8 50 Baby Cotton 12 8 12 8 50 Daily Wash 12 8 12 8 50

Model

Cw Off Ccw Off

Washing

Motor r.p.m

2) Final dehydrating r.p.m at each course

Model

Course Cotton 1000

Colour 1000

Synthetics 800

Wool 400

Handwash 400

Quick 1000

Ć You can change the r.p.m to the above a table by use spin button under no spin situation.

WF7450SAV,WF7450NAW

unit:rpm

3) The water supply control at each process cycle

Model

Process cycle Pre Washing Cold water 5L/min

Washing Cold water 10L/min + (Hot water 10L/min) Rinse Cold water 10L/min Final rinse Cold water 10L/min + Cold water 5L/min

WF7450SAV,WF7450NAW

4) The water level data at each course

Course

Cotton

Colour

Synthetics

Wool

Handwash

Quick

Model

Washing 23.80 24.30 24.10 Rinse 23.20 24.20 24.00 Washing 23.80 24.30 24.10 Rinse 23.20 24.20 24.00 Washing 23.00 24.00 23.70 Rinse 22.80 24.20 23.90 Washing 22.80 24.00 23.80 Rinse 22.30 23.80 23.35 Washing 22.80 24.00 23.80 Rinse 22.30 23.80 23.35 Washing 23.80 24.30 24.10 Rinse 23.20 24.20 24.00

Default water level

(kHz)

Supplementary water

START (kHz)

unit:Khz

Supplementary water

End (kHz)

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