Hitachi CV-SF8BS Service Manual

SERVICE MANUAL

CVSF8BS

No. 0177

SPECIFICATIONS AND PARTS ARE SUBJECT TO CHANGE FOR IMPROVEMENT

CONTENTS

1.Attachments ･････････････････････････････2

2.Replacement instructions

･･････････････････2

3.How to empty the dust case

･･･････････････4

4.Maintenance

････････････････････････････5

5.Final test

････････････････････････････････8

6.General instructions for
operation and maintenance

････････････････8

7.Parts list

････････････････････････････････9

8.Construction diagram and

connection diagram

･･････････････････････11

SPECIFICATIONS

Rated voltage :AC230V, 50Hz
Rated input :900W, MAX 1000W
Motor :Commutator motor
Fan :Turbo type 1 stage
Speed :39,000rpm
Insulation class of materials :Class E
Weight(Without attachment) :3.6kg(7.9lbs)
Dimensions :330mm(L)x255mm(W)x208mm(H)

VACUUM CLEANER

JUNE 2003 Hitachi Home & Life Solutions, lnc.

-2-

1. Attachments

2. Replacement Instructions

2.1 How to replace the power control board assembly, motor assembly and lead wire
assembly (include triac PWB assembly).

(1)Open the transparent case cover while pressing the button of dust case, and lift out the dust case

from cleaner body.

(2)Take off three tapping screws 4x20(7)(8)and two tapping screws 4x12(9), then the upper case

assembly can be removed.

(3)Take out the power control board assembly(13), motor assembly(18) and lead wire assembly(16)

from the lower case .

(4)Release the triac PWB assembly by taking off the lower case.

2.2 How to replace the power cord

(1)Open the transparent case cover while pressing the button of dust case,and lift out the dust case

from cleaner body.

(2)Take off three tapping screws 4x20(7)(8) and two tapping screws 4x12(9), then the upper case

assembly can be removed.
(3)Take out the cord reel assembly from the lower case .
(4)After rotate the cord reel assembly anticlockwise several times by pushing the C pedal to release prewind

of cord reel, take of a tamper proof screw 4x16 and three tapping screws 4x16 can be taken out.

Hose ass'y (With control panel handset and joint pipe)

････1

Rug & floor nozzle

･･･････････････････････････････････1

Extension pipe

･･････････････････････････････････････1

Crevice nozzle

･･････････････････････････････････････1

C pedal

Cord reel assembly

Tamper proof screw 4x16

Three tapping screws 4x16

(5)Pass the power cord through the upper case assembly and cord inlet.

(6)After assembly, wind a spring 5 times before set.

Upper case assembly

Cord inlet

-3-

2.3 How to replace the dust indicator assembly

(1)Take off the inner case(15) can be removed.
(2)Take out the dust indicator assembly.

2.4 How to disassemble the rug and floor tool

(1)How to replace roller ass'y(F)

Insert a blade of cutter between the roller shaft cover and lower case of rug & floor nozzle

(2positions, both edges off the rug & foolr nozzle), cut the projection of roller ass'y cover(F). And
detach the roller shaft cover(F) from the rug &floor nozzle with a screwdriver. (When you
maintenance the roller ass'y, please settle the rug & floor nozzle firmly, and be careful the blade of

cutter not to be broken.)
Detach the roller shaft and roller ass'y(F) from the rug & flooer nozzle.
Insert a roller shaft into new roller ass'y(F) and install it into lower case of rug & flooer nozzle.

Please assemble the roller shaft while facing flat face toward inside.
Push the roller shaft inside and put the roller shaft cover on it.Assure that the roller ass'y dosen't

take off from the rug & floor nozzle while pulling it with your fingers.

(2)How to replace roller ass'y(R)

Undo the screw and the roller shaft cover, and take off the wasted roller ass'y(R).
Replace to new roller ass'y(R), return the roller shaft cover to original position and screw it.

2.5 How to replace the hose

(1)You can separate the control panel handset from the hose.
(2)Pull the hose pressing two claws clicked into the holes on both sides of the control panel handset.
(3)Remove the seal ring and the stopper ring from the hose end by turning the seal ring (left-handed

screw).

(4)As to removing the joint pipe assembly(40) from the other side's hose end, do it as same as the

control panel handset removal.

2

1

4

3

2

1

Control panel handset

Claws Seal ring Stopper ring

Claws

-4-

1) Empty the dust case before the dust reaches the
max line. If you continue using the cleaner with a full
dust case, the suction power will be decreased.

2) Empty the dust case periodically.

3) When emptying the dust case also remove the dust
around the filters.

1

Open the dust case cover while pressing
the button of dust case, and lift out the
dust case from cleaner body.

2

Put the dust case into a big vinyl bag, and press the open button in the bag.

Notes :
¡When you lift out the dust case from cleaner

body, be careful not to press the open button
of the dust case.

¡Do not lift out the dust case from the body

while the cleaner is in use.

¡The dust case should be kept upright when

removing it from the body to prevent dust
spillage.

How to Dispose of the Dust

Note :

¡Before you empty the dust case, be sure to turn off the power and

unplug the cleaner from the mains socket.

¡Turn the dust case downward and push the open button on the lid of the dust case to release

dust into a vinyl bag.

¡To remove stubborn dust adhesion inside the dust case, pat the side of dust case.
¡Dust around the mesh filter and under the mesh filter can be removed with tissue paper and

an old toothbrush.

Notes :
¡Some types of dust may cause the suction power to become weak before max line is reached, in that

case, empty the dust and clean the filters.

¡If the rug & floor nozzle sucks some sharp items such as pieces of broken glass, pins, take care not to

touch them.

6

3.How to Empty the Dust Case

Max line

Dust
case

Dust case

Open button
for lid of dust
collection case

Button for the
dust case

Transparent
case cover

Dust
case

Open button
for lid of dust
collection case

Tissue
paper

Dust

The lid of dust case

Under mesh
filter

mesh
filter

The lid of
dust case

-5-

4.Maintenance

3

Close the lid of dust case until the button clicks.

5

Close the top cover until the button clicks.

Note :

¡Please be careful not to be put your fingers between the

top cover and dust case.

When the orange indicator appears in the window continuously, the cleaner requires emptying.
Check the dust indicator by lifting suction tool from the floor and removing the crevice nozzle when it
is used.

Note :

¡If the cleaner is used in such a condition that the orange indicator appears in the window, air to the motor

will be reduced and the motor will eventually burn out.

¡When suction power is weak, the operation noise level is higher and the filter maintenance sign

operates, the dust case should be emptied and the filters cleaned (inside mesh filter and under
mesh filter).

Filter Maintenance Sign

How to Empty Dust Case

Warning :

Before maintaining, the mains plug should be removed from the mains socket.

4

Push the dust case into the
cleaner body firmly so that there
is not a gap between the lid of the
dust case and cleaner body.

Click

Dust case

Lid of dust case

Dust case Body

Transparent
case cover

Click

-6-

Maintenance

Dust Case Filters
(The filters are washable.)

1

Remove the dust case and empty the dust.

4

2

1) Turn the dust case upside-down, press the
button with thumb,

2) Remove the cyclone chamber by pulling the
base of cyclone chamber with two fingers
(the forefinger and the middle finger).

3) Remove the dust around the inside mesh
filter. (The mesh filter is washable.)

3

Open the lid of the dust case and remove the
mesh filter, you can wash the mesh filter,
urethane filter, black filter and under mesh
filter with water.

1

2

4

Return the lid of dust case to the
original position until it clicks and put
the base of cyclone chamber on the
dust case. Align the

「｣

mark of the

base of cyclone chamber to the

‖｣

mark of the dust case.

5

Install the dust case into cleaner
body.

5

Note :

¡Be sure to set each filter in its correct position firmly, otherwise suction

power will be decreased.

HEPA clean filter (Required maintenance once a month)
(The HEPA clean filter is not washable.)

1

Remove the HEPA clean filter from the
dust case as shown in the illustration.

2

Remove dust around HEPA clean
filter by patting it gently.

3

Reinstall the HEPA clean filter into
dust case with grips facing the upward.

Notes :

¡Only pat the filter gently. If you pat it strongly, its shape may be changed and this will cause dust leakage.
¡Do not use a brush with hard bristles , it may cause damage to the filter.
¡Make sure that the HEPA clean filter is seated correctly. Otherwise you cannot install the dust case correctly.

If you use the cleaner without HEPA clean filter, it will eventually cause motor failure.

Mesh
filter

Lid of the dust case

Mesh filter
Urethane filter
Black filter

Under mesh filter

The base of
cyclone chamber

Cyclone chamber

3

Dust case

Under mesh
filter

Black filter

1

2

Inside mesh
filter

The base of
cyclone

chamber

Press the
button

Urethane filter

Click

Dust case

Lid of the dust case

HEPA clean
filter

Knob

The base
of cyclone
chamber

▲mark

合わせ位置


HEPA clean
filter

-7-

How to wash filters with water

Notes :
¡After washing the filters with water, please dry up them naturally and install them in their correct

positions. Do not use wet filters, as this may damage your cleaner and render it unsafe.

¡Do not wash the filters with hard hairbrush, do not wash the mesh filter vigorously, it may damage

the filter.

¡Do not wash the filters with detergent, bleach, benzene, thinner and alcohol, do not wash them in a

washing machine. And also do not dry the filters with hair dryer, otherwise we can not guarantee the
cleaner performance and quality.

Remove the mesh filter, the urethane filter and the cyclone chamber from the dust case,
and wash them with water. After drying the filters completely, fit them in their correct
positions and use the cleaner.

Mesh filter, urethane filter

¡Gently wash the mesh filter with water and an old toothbrush.
¡Wash and rub the urethane filter well with water until the water is clear, and lay it out flat to dry

naturally.

¡It can take a long time for the urethane filter to dry up, so please use a replacement one alternately.

Inside mesh filter

¡Gently wash the inside mesh filter of cyclone chamber

with water and an old toothbrush.

Maintenance for cleaner body

Unplug the cleaner from the mains and wipe the body
with a soft cloth slightly moistened with water.

Note :
¡Do not wash the cleaner with benzene, thinner and

detergent, it may cause colour change and transformation.

Black filter, under mesh filter and dust case

¡Gently wash the under mesh filter and black filter with

water and an old toothbrush.

Notes :
¡When suction power is weak, even though all the filters have been cleaned in the dust case and dust

has been removed from the HEPA clean filter, the filters will need to be replaced. When you need to
replace the filters, these should be purchase from a Hitachi dealer.

¡Replacement of HEPA clean filter is required every 4 years.

Maintenance

Mesh
filter

Urethane
filter

Mesh
filter

Inside mesh
filter

The base of
cyclone

chamber

Urethane
filter

Dust case

Under mesh
filter

Black filter

-8-

5. Final Test

(1)After reassembly,run the cleaner for at least 15 minutes without joining the hose to its main body and

be certain that there is no abnomal vibration.

(2)Measure the insulation resistance between the power supply plug and the metal surface by 500V DC

insulation resistance tester and be certain that the insulation resistance is not less than 10M ohm.

6.

General Instructions for Operation and Maintenance

(1)Always disconnect cord from electrical outlet before servicing the cleaner.
(2)Do not pick up matches, fireplace ashes or smoking material with the vacuum cleaner as a possible

fire hazard may result.
(3)Avoid picking up sharp objects. They may damage the vacuum cleaner.
(4)Do not use the cleaner to pick up wet dirt, and avoid using it in a wet and moist place as moisture

may damage the motor and other mechanical parts.
(5)Do not block the air flow. Any blockages or obstructions to the nozzle, hose, etc. or the exhaust air

outlet can cause loss of power and motor overheating.
(6)Do not run the cleaner over cord. It may damage insulation.
(7)Avoid cleaning the swich and receptacle parts with wet cloth and splashing water on it as moisture

may cause a short circuit.
(8)Your vacuum cleaner is not a toy. Do not allow children to play with it. Do not leave the vacuum

cleaner connected to an electrical outlet unattended.
¡Warning: Electric shock could occur if used outdoors or on wet surfaces.

THE UPDATED PARTS LIST

FOR THIS MODEL IS

AVAILABLE ON ESTA

-11-

8. CONSTRUCTION DIAGRAM AND CONNECTION DIAGRAM

13

11

8

1

9

10

6

12

14

24

7

7

26

25

23

34

33

38

37

35

41

36

39

37

38

39

40

31

32

28

29

16

15

21

20

27

19

22

43

17

18

13

2

24

4

42

20

18

30

5

3

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International Sales Division

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