Hitachi CV-SG90 Service Manual

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SERVICE MANUAL

CV-SG90

VC No.0236E

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 :AC240V, 50-60Hz 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 Dimensions :330mm(L)x255mm(W)x214mm(H)

VACUUM CLEANER

SEPTEMBER 2004 Hitachi Home &Life Solutions,lnc.

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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 dust 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 dust 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 four tapping screws 4x16 can be taken out.

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

････1

Ion Air Turbine Brush

･････････････････････････････････1

Telescopic Extension Pipe

･････････････････････････････1

Crevice nozzle

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

Carrying Handle

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

C pedal

Cord reel assembly

four tapping screws 4x16

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

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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 ion air turbine brush

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

Insert a blade of cutter between the roller shaft cover and lower case of ion air turbine brush

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

of cutter not to be broken.) Detach the roller shaft and roller ass'y(F) from the ion air turbine brush. Insert a roller shaft into new roller ass'y(F) and install it into lower case of ion air turbine brush.

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 ion air turbine brush 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.

Seal ring Stopper ring

Control panel handset

Knob

Hose

Claws

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3.How to empty the dust case

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.

Note :

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

unplug the cleaner from the mains socket.

Dust case

Max line

 

Dust case

Dust

Open button for lid of dust collection case

The lid of dust case

Open the dust case cover while pressing the front side of cleaner body, and lift out the dust case from cleaner right above.

Mesh filter

Remove tiny dust from the mesh filter.

Maintenance brush

 

Pleated black filter

90°

Mesh filter

max.

How to dispose of the dust

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 turn the dust case downward, otherwise it may

cause dust scattered.

¡Move the dust removal lever on right and left by ten

times. Request : ¡If the suction power would be weak, please move the

dust removal lever several times more. At the maintenance of pleated black filter,

1) Open the pleated black filter to the angle of 90 degree.

2) Remove the filter downward with keeping opened. When you reinstall it, put the filter by contrary way of removal.

Transparent case cover

Open button for lid of dust collection case

Front side of cleaner body

Maintenance of pleated black filter

¡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. Caution :

¡When dust is put to the pleated black filter, remove it away

from the filter with attached maintenance brush.

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

Request : ¡When you reattach the maintenance brush

to original position, set it firmly according

to the procedure 1)

2).

Notes : ¡If the ion air turbine brush sucks some sharp items such as pieces of broken glass, pins, take care not to

touch them.

Remove the dust around mesh filter with attached maintenance brush.

Pleated black filter

Dust removal lever

Remove filter

Back side

 

Dust case

Dust case inlet

 



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How to empty dust case

Dust case

Set the dust case not to make any gap between the lid of the dust case and cleaner body.

Body

 



Carrying handle

Transparent case cover

Close the lid of dust case until the button clicks.

Caution : ¡Be sure to set the dust case and each filter, and operate the

cleaner. Otherwise motor noise level will be increased. And also some dust enter the motor, it may cause motor failure.

Note : ¡Please be careful not to be put your fingers between the top

cover and dust case.

¡In case that the base of cyclone chamber is not set correctly,

the top cover may not be closed. Close it until the button clicks.

The lid of dust case

Install the dust case to original position firmly.

Close the top cover until the button clicks while pressing down the carrying handle.

Warning :

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

Filter maintenance sign

¡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.

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.

  

Click

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Maintenance

The base of cyclone chamber

Press the button

 

The base of cyclone chamber

 

Inside mesh filter Urethane filter

Pleated black filter



Warning :

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

Remove the dust putting on each filter.

Reinstall the lid of dust case and base of cyclone chamber into dust case.

Detach the washable HEPA clean filter while pulling the knob of the filter, and remove dust with attached maintenance brush.

Reinstall the washable HEPA clean filter into dust case.

1) Press the button and remove the base of cyclone chamber.

2) Remove tiny dust around inside mesh

filter with attached maintenance brush.

Inside mesh filter

Remove tiny dust from the mesh filter.

Open the lid of dust case, and remove dust with attached maintenance brush.

Wash and rub the urethane filter well with water until the water is clear, and lay it out flat to dry naturally.

¡You can clean the filter by

taking it out.

¡It can take a long time for the

urethane filter to dry up, so please use a replacement one alternately.

Set the base of cyclone chamber until it clicks while aligning the ▼ mark of the base of cyclone chamber to the ▼ mark of the dust case.

Caution : ¡In case that the base of cyclone chamber is not set into the

dust case correctly, the attached maintenance brush may be taken off.

Caution : ¡Be sure to set the washable HEPA clean filter and operate the

cleaner because the filter is useful for protection of motor.

¡Do not scrub it strongly, otherwise it may cause filter damage.

Reinstall the dust case into cleaner body.

Request : ¡Maintenance for washable HEPA clean filter is required once a month to keep suction power. The

maintenance timing depends on types of dust and number of cleaning times. Caution : ¡Be sure to set the dust case and each filter, and operate the cleaner. Otherwise motor noise level will be

increased. And also some dust enter the motor, it may cause motor failure.

Back side

Maintenance brush

Washable HEPA clean filter

Knob

Washable HEPA clean filter

Urethane filter

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

Remove the dust case and empty the dust.

Request : ¡Clean filters according to ‘How to empty the dust case’.

Pleated black filter

The base of cyclone chamber



合わせ位置



抗菌サイクロン室キャップ

Click

mark

 

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Maintenance

Inside mesh filter

Mesh filter

Urethane filter

When you feel ‘weak suction power even though after maintenance’ and ‘dirtiness of filters’, wash each filter with water.

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

Dust case

Pleated black filter

¡You can clean the filter

by taking it out.

Washable HEPA

clean filter

¡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.

Dust case

Mesh filter

Pleated black filter

¡As for the dust stopped

at the bottom of pleated black filter and washable HEPA clean filter, open the pleat and wash away the dust with water.

Notes : ¡After washing the filters with water, please dr y 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.

¡Be sure to set the dust case and each filter, and operate the cleaner. Otherwise motor noise level

will be increased. And also some dust enter the motor, it may cause motor failure.

¡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.

Urethane filter

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.

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.

Remove tiny dust from the mesh filter.

Inside mesh filter

The base of cyclone chamber

Washable HEPA clean filter

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5. Final test

(1)After reassembly,run the cleaner for at least 15 minutes without joining the hose 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.

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.

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