Sanyo MLS-3751L, MLS-3751, MLS-3781, MLS-3781L Service Manual

I FILE No.

SERVICE MANUAL High-pressureSleamSlerilizer

Labo

Autoclave

MODEL NO.

MLS-37S1

Ll3781

L

Photo:

MLS-3751

L

INDEX

~--

ITEM NAME PLATE

•

Model

No.indication

R""N,r:; LABEL

+Model

No.

and

rated

power

supply

voltage

are

indicated

here.

Model No.

Rated

Voltage Plug

MLS·3751L AC 120V
MLS·3751L

AC230V

MLS·3781L

AC230V

MLS·3781L

AC230V

Productcord

No.

131699501
131699502
131699401
131699402

1.

Safety Precautions

in

Servicing Work

....................................................

·············1

2.

Specifications

......................................................

·········································2

3.

Outside Dimensions

...............................•...........•...........•...........................

3"""4

4.

Names of

Parts

and Operations

......................................................

··············5-6

5.

Construction and Functions

.......................................................................

7

..........

10

6.

Piping Diagram

and

Wiring Diagram

...........•...........•...........•..................

·····11~12

7.

Process Flow

and

Operations

..................................................................

··13~21

8.

About Various Modes .. · .. · .. · .. · .. · .. · .. · .. · .. · .. · .. · .. · .. · .. · .. · .. · ..

····

.. · .. ·

....

· .. · .. · .. ·· .. 22

..........

27

9.

Temperature

and

Pressure Adjustment and Checking

....................................

··28

..........

32

10. Thermistor Temperature Characteristics /
Altitude.

Atmospheric Pressure and Boiling Point

in

Standard

Atmosphere················

33

11. Circuit Diagram

......................................................

······································34

12. Troubleshooting

......................................................

································35~44

13. Disassembling Procedure

.............•...........•...........•...........•......................

··45~50

14. Instruction Manual .. · .. · .. · .. · .. · .. · .. · .. · .. · .. · .. · .. · .. · .. ·

..

· .. · .. · .. ·

..

· .. · .. ·

....

· .. · .. · .. ·· ..

51

..........

63

15.

Parts

List

.......................................................•...........•......................

··64~71

16. Instruction Manual

of

Works for Optional Parts

···

.. · .. · .. · .. · .. · .. · .. · .. ·

....

· .. · .. · .. ·· .. 72

..........

79

REFERENCE No. SM6610004

1. Safety Precautions in Servicing Work

Please

read

the "Safety Precautions" section carefully to prevent any accidents during service repair

and

provide a safe product .

• Loss

or

damage which

may

result from failing to heed these precautions and degree

of

their urgency, the precaution

have

been

classified ioto the

three

categories

&Danger

This

indication

shows

the

content

of

the

result

in

the

death

or

serious

injure

of

the

operator

or

other

persons.

&Warning

This iodicates a potentially hazardous sitoation arisiog from the mishandliog

or

mis-operation

of

the unit which,

if

not

avoided, could result

io

the death orserious iojury

of

the operator

or

other

persons.

&Caution

This iodicates a potentially hazardous sitoation arisiog from the mishandliog

or

mis-operation

of

the unit which,

if

not

avoided,

may

result

io

mioor iojury

of

the operator

or

other persons

and property damage .

• The figure sign classifies the contents that must

be heeded,

and

is explaioed. (The followiog sign is an example.)

6.

1bis symbol calls

attention

to a danger,

warning

or

caution,

so please

take

care.

0

This symbol calls attention to

an

action which the operator is prohibited from performiog,

so

take

care

.

•

This symbol calls attention to an action which

must

be

performed

or

which the operator is

iostructed to perform, so

tske

care.

&

Warning

Always

unplug

thc;unit

when

carrying

out

inspection

or

repairs.

• Do

not

damage

or

change

the

power

cord . This

may

lead

C

• Always

unplug

the

unit

from.

the

outlet

when

assembling,

6)

to electric shocks

or

fire.Placing heavy objects on

the

disassembling.

inspecting,

or

replacing

parts.Failure

to

power

cord,

heating.

or

pulling

it

could

result

in

damage.

PI_pull

0lIl:

a

observe

the

above

could

lead

to electric

shock.

or

injury.

Pl""='

fUIlPly

phi'

Always

return

the

wiring

to

its

original

condition

after

carrying

• Do not splice

the

power

cord,

plug

it

into

an

extension

out

inspection

or

repairs

on

the

unit.

cord.

or

use

it

with

multiple

plugs

in a single

outlet.

&

•

Tighten

the

lead

holden so

that

the

lead

wires

do

not

6)

Failure

to

observe

the

above

could

result:in

electric

touch

revolving

parts,

high-temperature

parts,

shocks,

heating

'"

fue.

high-pressure

parts,

or

edges (sides)

of

parts.

Contact

could

lead

to

ma1fimctions,

electric

shock,

or

tire.

~

Take sufficient care

of

electric shocks.

0

• Always

replace

damaged

or

worn

power

cord

or

lead

•

Take

sufficient

care

of

electric

shocks

from

the

charged

wires.Failure

to

observe

the

above

could

result

in

electric

c.utiowl

of

1111

parts

'"

lead temllnals.

shock,

beating

or

tire.

electric:

shock

Always use specified

parts

when repairing.

0

•

Parts

marked

with

it

are

safety

parts.

These

parts

are

0

•

Confirm

that

there

is

no

dust

and

that

the

plug

is

secure,

inserting

it

all

the

way

in.

Dust

or

bad

connection

could

important

in

maintaining

safety.

While

replacing,

always

result

in

electric shock

or

tire.

use

the

specified

parts.

0

•

When

repajring,

always

use

the

part

listed

on

service

parts

table

for

the

appropriate

model

and

appropriate

tools.

Also,

under

no

circumstances

are

modifications

to

the

unit

to

be

carried

out.

Failun:

to

observe

the

above

could

result

in

electric

shock,

heating

or

fire.

&

Caution

Beware

of

burns

due

to high

_perature.

&

•

Measure

the

insulation

resistance

after

repe:irs

and

@

con:fum

that

is at least

5M

(1

.

•

Take

care,

as

after

operation

the

chamber

door,

chamber,

A

problem

in

the

insulation

can

lead

to

electronic

and

piping sections

are

extremely

hot.

shock.

_,_

Always

wear

gloves

when

repejring

or

inspecting.

&

• Confirm

that

the

position

of

attached

parts,

condition

&

of

the

wiring,

and

soldering,

or

crimp

connections

are

• Use gloves

to

avoid

injury

from.

the

edge

ofmeta11ic

normal.An

abnormality

can

lead

to

heating,

:fire

or

surface.

electric

shock.

-1-

2.

Specifications

Product

Designation

Labo

Autoclave

(High-pressure

Steam Sterilizer)

Model

Designation

MlS-3751/3751 l

MlS-3781/3781l

120V unit: 120VAC ( 50/60Hz

),

15.BA 220V unit: 220VAC ( 50/60Hz),

lB.2A

Power

supply

220V unit: 220VAC

(50/60Hz),

9.1A 230V unit: 230VAC

(50/60Hz),

17.4A

230V unit: 230VAC ( 50/60Hz

),

B.7

A

Power

Consumption

1.9kW ( 120V

only),

2kW

4kW

External

Dimensions

47B(W) x 632(D) x 74B(H) mm 47B(W) x 632(D) x 965(H) mm

Weight

Approx.

61

kg Approx.

71

kg

Internal

Capacity

57l

BOl

Effective

Internal

Capacity

50l

75l

Chamber

Dimensions

370 (dia.) x 415(D) 370 (dia.) x630(D)

(Effective depth including

cover:

463)

mm

(Effective depth including

cover:

6BB)

mm

Chamber

Material

SUS304 (Austenitic stainless steel)

Sterilization

Temperature

115°C - 135°C

Melting

Temperature

60°C - 114°C

Heat-retention

Temperature

45°C - 60°C

Thermometer

Thermistor, digital display (25°C - 141°C)

Safety

Valve Releasing Pressure

240kPa (34.Bpsi, 2.4bar)

Pressure

Gauge

Range

-0.1

- 0.4 MPa

Sterilization

1 min. - 5 hrs.

Melting

1 min. - 5 hrs.

Timer

Heat-retent

72 hrs. fixed

Timer

1 week (Designation: Year, month, day, hour and minute)

Exhaust

Tank

2 liter Polyethylene tank

Warning

and

Safety

Functions

Pressure safety valve, overheat prevention device, dry-scorch prevention,

cover interlock, excessive pressure prevention, earth leakage breaker

Sound

Pressure

level

Max. 75dB (A)

Stainless

steel

baskets -Large:

1,

small: 1 Stainless

steel

baskets -Large:

2,

small:

1

Accessories

Drain hose: 1

Exhaust

tank

(1),

exhaust

tank

at

rear

side

(1),

tank

mounting

bracket

(1)

and

tip-resistant

metals

(2)

Object temperature sensor, external temperature sensor,

printer, stainless

steel basket (large), stainless steel basket (small),

Optional

Accessories

punching basket, sterilization can

·Please consult us about the model number, price, delivery date, etc.
including other optional accessories than shown as above .

• The specifications may be subject to change for improvement without prior notice.

-2-

I

Front

Side

I

478

75

~

t-

l

~J

~

\

~

-

c-

D

~

r-

'-

100

II

=W

100

r~

I

:a

1

~

l::

1159

420
678

Lateral

Side

I

<1~

1

\

1

1

632

I

1

1

\

I

I

1

o

I.

=

===

=

===

=

===

===

ill

·

;..c:1

1c::::::J1

·

---,

=

.

=

=

=

.

·

. .

II}

~

g

426

71

66

607

673
689

766

~

9

~

'"

""

""

•

eN

-..j

0'1

......

r

o

c::

en

c:

CD

g

3

CD

:::J

C/I

c)"

:::J

C/I

~

3

3

~

o

c

......

en

0..

CD

o

3

CD

:::J

en

o

:::J

en

I

Front

Side

I

75

..--

\

D

Lateral

Side

I

-4~

1;-1

632

I

I
I

•

['II

=

===

=

===

=

===

===

1!1

·

1c:::::J1

·

r""

'--

-..J

~9

=

.

=

=

=

.

·

.

.

~~

~

426

171

66

607

673

689

766

<=>

~

o.n

...,

...,

•

w

-..j

00

......

r

o

c::

!if

c:

CD

g

3

CD

::::I

CJl

c)'

::::I

CJl

4.

Names of Parts and Operations

Rear.lde

»

~"

=

'8

~

~

~

~~=~~2r~~~~pno~'~U~~~~IW~~~+-

______________________

+-

__

~

~

Steam

is

discharged

through

this port

if

pressure

in

the

chamber

rises

abnonnally.

••

•

•

Control panel

•

MOVIIbie

handl.

•

Used for unlocking the cover. •

The

covar

can

be

unlock8d

by

../

- 1- -.....

____

-.

Exhaust

tank

,---J~

on

the

rear

side

pressing this handle down and

~

I "

pulling

toward

you.

~

j:

-

l:

:::;;:;;;::

';'7

V

~/t

11C;;;;;~;;;;;C~0YII~r;;;;;;;;,,"~

r

---=c-::::-----,I

~r-~~

~

C'

0 -l /

~

CQllllllr

to shut the chamber tight.

~

It

is

lined

with

silicon

rubber

Handle

pecking.

Use

for

opening/closing

the

~

cover.

II

@

G~p

P

.....

UNa.ua.

Indicates the pressure inside

the

chamber.

mn

~

I

~

!

..

. LrJ

oH)~-~c-::~r'lch

~

Exhaust tank

~

-

If

.,

...

f-Co-nd-e-'n."e"."'."'tea=m"e"m"';H'-ed--+-J.~

.l;

"",J]

J •

~

v

R"""""

thO

""",r to

",nnee!

th.

from the chamber. _ . V

optional

printer to

the

product.

-•• -

......

JI---C~~

Tankcua

Encases the exhaust tank.

Exhau.thOH

Sends

steam and air in the

chamber

to

the exhaust tank.

" :

~J-</

C

==~~~==~

--

Rtfr~4

•

.

'Ii

C

••

tar

Exhu.t

valve

Manually

opening/cloeing

valve

uaed

for

draining

heating

water

from

Ihe

Ohamber.

Drain outlet

Packing.

'\

~.~!

..

!

Hose in

tank

Ii.

~

f-::-------'====----c-

+---t+

,,"

f+-

; .f!

~

Converts steam discharged \ p
from the chamber Into

water.

~

Heating

water

III

drained

from

the

Ohamber

Ihrough

this

outlet.

Connecl:

the

included

drain

hoee

to

drain

heating

water.

-5-

Control panel

II

Cover lock lamp

Indica\N

hi

_ tim., rem

....

ing

Indica\N

hi

nlu.

of the currvnt

U~

""

wIIIIn

opI~on.aart.

tm.,

llerilizdon

qd8,

exhawt

proce

.

with

•

flitbring

bar.

with

..

COlIer locked.

!D,

cautionary

m~

.rror

mMIIIIgIIl,

dIIte IIIId

voice

~id.

,bulla" .

Mltting.

WhIll1

the optlona'

obfect

Indicates Iha

_18cIed

lblrilizRliDn

tlImperlltUre

.,".or

I,

In.lalled

I

cycle with • Iii limp.

and

thl'

object templll'&lure

button

'-

preMed,

the

I~

IIglU

Indica\N

hi

currtlnt

...,.ratu

...

,

up and

the llerlllzatlon tllTlllr

II

controlled

by

!he

~rature

of

llerilizdon

Nt

I8mpendur.,

,lamp

obfMD

to

be

.....

lIzed.

mIIlting MI

temperature,

IIIhBUII:

IIIIrling

templill1llUre,

date,

hourimllUlM

and

voice guide LIghts

up

wh8l'l the chamber

'-

MIttIng.

Intemally

undlr

prusure.

Thlllllmp Ilghtl

up

whln

thll

button

'-

pl'UMd.

I

.

IBB

I

fo

:

v

-

~

~

BAtI'tD

.

..

IBBB

lo, •

~

-

~

~

,-

~~

~

''';

.:-:

Timer I

s_

thallma untiliha

liar!

of

' bUtton

Model No.

r

operation.

Indates

changa

01

MIllIngs

and

MIllIngs

01

CUlTlll'lt

op8l'llllDn

on

Stop I

II1II

digital

dilplays'lnd

II.

Stope

operdon

and

cancelli

lJMd

Ibr IlItIIng

and

dlRnglng the

tilnllr

Htting.

and hINd-l'lMntion.

sIIIr1llz1lllon

tempM'atul1l,

sItIr1llz1lllon

1m.,

nwllng

I8mpllllLlure, rnellng

Ima,

hINt-

lJMd

In

engage

the

cooling

modi!

....

ntion

tamperw.tul'8,

1IIChI.u.t

Start button

I8mperalure, sIIIrt timer and

clnlng

IIXhaulilng.

..,.ust

rate.

StarIti

opaIW.tlon

and

IIm

..

_

operation.

Time I

Current Ilmlli5

DlICUld

on

SIIIIIca

.ny

013

progran-.1IIId

<4-

clgital dllplay

I.

cydIII

(toIII1

121111111c101ll).

-6-

5.

Construction and Functions

_

Names

of parts

and

functions are

common

to Series

3751

U3781

L.

The

photo

shows

Model

MLS-3781

L.

.

Part

name

may

be

I I list

when

you

place

an

order.

1

2

3

4

7

-

,

No. Part Name Function

1

Pressure gauge Bourdon tube pressure gauge for displaying pressure

in

the chamber

2

Tank

Tank

for exhausting air

in

the chamber

3

Front panel Front side frame constituting the appearance of the temperature

detector

4 Richt side

Danel

Constitutina the richt side appearance

of

the unit cover

5 Side

panel.

R Right side frame constituting the appearance

of

the unit

6

Left side panel Constitutin the left side appearance

of

the unit cover

7

Side

panel,

L Left side frame constituting the appearance

of

the unit

8

Safety valve cover Plate to block steam

blOW'ing

out when the safety valve

is

actuated

9

Back side

Danel

Richt side frame constitutina the appearance of the unit

10 Handle, frame

Handle for moving the unit

-7-

1

13

12

14

2

15

11

16

17

Right Side

No. Part Name Function

11

Valve

assembly,

1/28 Manual valve for draining the water for heating the chamber inside

12

Fan

motor Air

blowin~

fan for coolina the chamber

13

Chamber set Chamber to seal

UD

steam

and

Derform

sterilization

14

Chassis Base plate

to

fIX

the arrangement component parts and support

them

15

Caster Caster for moving the

unit.

4 casters are

used.

Equipped with lock

function

16

Pressure sensor Semiconductor sensor for detecting the pressure in the chamber

17

Thermistor assembly Sensor for temperature detection

-8-

18

19

II

-9-

20

21

22

23

24

25

26

(The

operational

unit

body

is

in

this

unit.)

i i

27

28

No. Part Name Function

27

Packina,

chamber

Fitted to the

lid

by

sealine oackina for sealing

the

chamber

28

Lid

set, chamber Chamber

see

line

lid

which

can

be ooened

and

closed

Quicklv

29

Heater cover stand

on

which sterilization object to

be

put

In

the chamber

Is

placed

30

Packing,

panel

Packing

to

seal the gab between

the

dlamber and the

panel

31

Sheathed heater set Heat source heater

to

generate sterilizing steam

32

Lock

shaft.

Part for locking to seal

and

fix the chamber

and

the

cover

33

Panel

Panel

to vertically oartition the chamber

and

the

cover

34

Circuit breaker Electric pert to shut down the power supply circuit

in

case

of

an

over-current

in

the

unit

-10

-

6. Piping Diagram and Wiring Diagram

•

Piping

Diagram

HOSE

EXHAUST

I

JOIN'[ L R1I4 x G1I4

FLARED

SAFETY

VALVE

AS~

(560)

r::V~

PIPE

AS~

SAFETY

VAlVE

HOSE

TANK

/ \

.~

JOINT,

ORIFICE

(\)1.8

HEATER

AS~

ELECTROMAGNETIC

VALVE

NC

PIPE,

EXHAUST

PIPE

ASSf,

PIPE

COOLING

rs

PRESSURE

GAUGE

'"

SENSOR,

PRSSURE

NSK -BAOI

OB -092

HOSE,

IN

TANK

PRESSUR

GAUGE,

350P

PIPE

ASSf,

PRESSURE

SENSOR

JOINT T VACUUM

JOINT T CHAMBER

TANK,

MLS -3781

VALVE,

VC12B1-F

VALVE

ASSY

DRAIN

3781

PIPE

ASSY,FREX

.l250

-

11

-

•

Wiring

Diagram

51:

Rl

81:

OJ

16

C

51:R2

81:

Q2

3 1

aRCUIT

3 1

BREAKER

10

C

51:Rl

L,J

81

:Ql

I

11iERMOSTAT

(MANUAL

RE1IIRN)

=

P

---D

lIiERMO

HEATER

J

HEATER

DD
DD

CN10l D DS -PCB

OS

CN103rl~~=

SClENDID

CN201

Il=~SPPCB

,,JL,',f)"D7S1CE

P,C.O.

Am,

DISPlAY

3781

U=:::J

L----D

ltj

I

n--------n1

PIISSURE

LOCK

SHMT

~SP

S"""R

cd

SW

un

n

;;

lli®l:'":.ECT

TEMP

Q

81'~'

~

e!

SENSOR

,--------~

I

PS

51:'

IDl'TIDNJ

-

3

14

~13

J.d

13

r!d 1

gmj

LCNlLJ

LOOfiJ

~

~

3

mt

1

EXHAUST

VALVE

51:W

0--0

n-

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51

in

the figure shows MLS-3751

L,

and

81

shows MLS-3781 L

-

12-

2A

37S1L(12OV),3781L(23OV

ENTElA):

Cl7811N1RA

one!

MOOEl5:

(3781

CE

7.

Process Flow and Operations

(OOperations and displays

I Operations and Process!

Digital Display I

Digital Display

II

Turn

ON

the

power.

Boiling point setting temperature

is

Bar display "--

-"

is displayed for the

displayed for the first 4

sec.

Thereafter,

f--

first 4

sec.

Thereafter, the display

the display changes

to

stand-by display. changes

to

stand-by display.

STAND-BY

~

Setting temperature

is

displayed.

f--

Setting time

and

cycle are displayed

However,

The

temperature

in

the alternately. However, the water heating

I

chamber is displayed by pressing the temperature is displayed

by

pressing the

" ... " +

"T"

buttons at the same time. If

" ..... + " ..... buttons at the same time.

If

Put sterilizing object

the temperature

is

lower than

25"C,

"La"

the temperature

is

lower than

25"C,

"La"

and

close the cover.

is

disolaved.

is

disolaved.

I

Press the start

button.

"COVER

LOCK

" lights

up

and

the process monitors flicker.

HEAT

f--

Temparature

in

the chamber

is

f--

Nothing is displayed. However, the water heating
temperature is

displayed

by

pressing the ~ ...

~

+ "

....

displayed. However, if the temperature

buttons at the same tima.

If

the temperature is lower

is lower

than

25"C,

"La"

is

displayed.

than

25"C.

·Lo~

is displayed.

STERI

(MELT

)

Temperature

in

the chamber

is

Kemalnlng

smnllzatlon

orne

IS

CISPISyeC.

However,

r--

displayed.

r--

the water heating temperature is displayed

by

pressing

the""'~

+ ..... ~ buttons at the same time.

I

EXHAUST

Temperature

in

the chamber

is

NOlmng

IS

cisplaye~.

nowever,

me

WSIer eaung

r--

displayed.

r--

temperature is displayed

by

pressing

the"

..... +

..

.....

buttons

at

the

same

time.

1""---------

_._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._----

Elapsed keep-warm time is

displayed_

However, the

Temperature

in

the chamber

is

water heating temperature is displayed by pressing

KEEP

WARM

f-- f--

the

tt

... w +

~

... u buttons at the same

time_

By pressing

displayed.

the

ttRESERV"

+ ~ .... at the same

Ume,

the elapsed

keep-warm time is displayed

in

minute_

STERI/KEEP

WARM

MELT/KEEP

WARM

----------

--------------------------------------------------------------------------------------------------------

Bar

display"

" is displayed. However, the

Temperature

in

the chamber

is

water heating temperature is displayed

by

COMPLETE

r--

displayed. However, if the temperature

r--

pressing the

....

" + MT" buttons at the same

is lower

than

25"C,

"La"

is

displayed.

time.

If

the temperature is lower than 25"C,

"Le"

is

displayed.

I

"COVER

LOCK

"goes out

and

the

all

process monitors light

up

and

the "COMPLETE"

I

flickers.

pen

me

cover ana

take out sterilized

obiectCs).

Setting temperature is displayed_ However,

Setting time and

cycle are displayed

I

the temperature in the chamber is displayed

alternately_

However, the water heating

~

by pressing the

...

" + MT" buttons at the

temperature is

displayed by pressing the

...

D +

STAND-BY

same time.

If

the temperature is lower than

f--

"T-

buttons

at

the same

time_

If

the

25"C,

"Lo"

is

displayed.

temperature is lower than 25"C, "Lo· is

displayed.

-

13-

• Liqyid Sterilization

(]-1

1-2

and

1-3)

~ ~

~

•

~

~ ~

"",-

Heatilll

Airpurp=

Heatilll

Sterilization Coolilll

Corq,letion

powLIW.

Lid

!ION

'I

'I

,

'I

, ,

'I

"".

--

....

Boiling point

R""chi..-

Udapen

IS.--

'"

...

-.

SteriliZlltionutl:imll

Te

Sterilization

settinlte~

-

------

---

------

f-----

Imin.

~

OFF

at boiling

Exhaustsettinlte~.

-

f-------

---

------

r...J!.Ol!!!;+7'C

__

---------

-=n

A

.....

_

---------t

BoilinlPoint-

------

---

------

f-----

---

---------

65"C-

------

--- ---

-

f-----

---

---------

--------1-_

,

~

i

.'

---------

....

---__

i

,,"

--,

."

...

"

..............

"

;,

0""'"-

r-.

~f-----

---

---------

--------~~

HeaterTriack

••

•

•••

Heater relay

Exhault

valve

(NO

Handesolenoid

(Unlocked bypower-ON)

F~

...,

ShortBeep

~

..

~.,(1";m

••

Speaker

~

~"

...

;

Dilital

c:isplay

1

...

,-

I"

Temp.

in

Chamber (Displayed

lit

hillher

than

25'C)

Dilital

c:isplay

2

"',-

Rllmainilll starilizatian

i

,~

I

!

!

Processmonitor

H..ti"lll

H

..

ting2

Sterilization

""

Exh.uat

1

~

Corq,Iet;ion

~

"',-

,

...

,-

"',-

>

-

1'0)

.....-

"tI

.,

o

n

CD

1/1
1/1

-to

0'

:E

n

:::r

\II

.,

....

Temp.

Press.

nStorilization/Koep

Warm

(2-1

2-2

and

2-3)

1

'I

Lid

OIOM

Start

•

Heatin

'I

Boilinl

point

• •

Heatin

,

'I

Reaohinl

set.

temp.

• •

Sterilization

Cooli

Compllftion

,

,

,

'I

Lid

open

Ster1IIZ11tloneettlme

Sterilization

settingtemp.

---

--------------- ---------------

----------------

==

••••••••••••••••••••••••••••••••••••.

~:~~

•••••••••••••••••••••

·.~\~==:7~'~h~,:.===!1-

__

_

--

i"---------I--

i

/

----~

~~

~

~

""

....

;........... i

,~

ot.I'.

--1------

__

.+

__

._.L

---------------

-----------

------------------------

------------------i----"r-t-----'--+---1

HeaterTriack

Heater

relay

Exhaust

valve

(NO)

Handesolenoid

(Unlocked

bypower-ON)

Fon

••

••••

i

••••

Stand-by

,

___________

~

__

.k_.'~~~~~~.i~~~i:~~~·~~~~~~~~~~~~~~~~~

..

~~~~~~~

Digital

display

1 I

...

---

...

-"-

...

...;.r=--;--'TV'-----"T"-----"T"---"T"--T ...

...;.-.

_;"_"'"""

__

._'~(D_;

..

i-'

...

;...d_"_h

..

;;..._'_"_._"_25""..;.)

...,-...,--------...,----~

..

T

....

----..;.-~"

k"

i"(1'''m~

It

Stand-by

>

Digital

diSPlay21

.....

__

...

...;."~

...

...;.r-_"l

I

Process

monitor

Heatl1'll'2

. nemaininl

sterilization

,,-

Starlllzation

Exhaust

1

Keep-wann

elapsed

Stand-by

>

time

I"

KellJlwann

Comph!ll:lon

• Melting/Keep

Warm

(3-1

3 - 2

and

3-3>

When

the

mettlna:

temp

....

ture

II

Ht

at

hl&her

than

l05"C, flXhault. aperatlan II performed for 8

mlm..t

boIllna:

pHrt

+ 5"C

.fter

heatlna:.

• •

•

""-

He.tinl

Meltinl

1

'1

,

m,.--

T.

p~

pJr_.

Lid

clo..

Start

~lhina:

ss.--

'"

'"

....

Meltinl

Ht

time

Meltingsettingtemp.

--

----------------

-------

----------------

Keep-wannsettingtime

---

---------------

--------

---_.-

----_._-

---_._-----_._-----_._-----_._---

".

r----------

0

....

--

-----

---

...............

J-.--

---_._-----_._-----_._-----_._---

Hem:erTrieck

••••••

Heater relay

Exhaust valve (NO)

Handesolenoid

(Unlocked bypower-ON)

Fon

....

ShortB.ep

Speaker

.~

•

."dBo,P

•

Coolinl

,

~

"',

-----------

~

....

•

•

"',,-

Completion

,

'I

Lid

open

72 hra.

------_._-----_._-----_._--

-

r-

r-------

--

•••••

~

....

lieP(lOtim

..

>

Digital display 1

""-

T.....,.

in

Chaniler (Displayed

at

hilher

then

25"C)

Digital display2

""-

RemIIininl

meltina:

time Koap-warrn elapsed time

Proc8samonitor

I

HtNrtina:l W Meltinl

Elchauat

1

It

"'''-

W

Completion

•

""-

,

""-

>

""-

>

.Instrument

Sterilization (4=1

4-2

and

4=3)

• • • • • •

--

Heating

Air

pu

....

H..ti

Sterilization

~Ietion

T.""

--

.,L

lJd~

:!..

'I

,

'I

,

Boiling

point

Reaohing

,

'I

Udopen

Press.

--

a<

...

-.

Sterilization_time

Sterilizationsettingtemp. ------------------

-------

----------------

---------------

---------.,.,l-

i

________

_\....

OFF::ilinr

/i

point

+1"C

:

BoilinSpont---

---------------

--------

)---------

....

/'

....

~

: "

/ '

....

OM.,

-+---+-+--,--£'.

~~~.

;:--+---------------

.....

"'!----+---.-I

HeaterTriack

Heater

relay

Exhaust

valve

(NC)

Handesolenoid

(Unlocked bypower-ON)

Speaker

••

:

....

~

..

,

~.ep('Otim",

•

--

,

Digital display 1

1'--~-;;;;;~-.;;;,r--'II'----...,-----...,--~T.~m~'.,;;;"~c~

..

~""~w~(D~;-;;;;~.~d~.~'~h;;"',W~"";;;;"~"~"~};..._

...

-----T"----,/T

.......

---;;;;;~-~--.>"

I

~Ietion

--

>

Digital display 2 St:.nd-by k

momalnlna:

sten

IlAtion

1'-----;-1-

:

,-

....

,---_.1....-""''',',....

....

Heatinl'

']

Heatinl

2

~

Sterilization

']

Processmonitor

Exhaust

,

Exhaust 2

(3)Descriptions of process operation

G)Set the exhaust tank to the unit.

Fill the exhaust tank with water up to the "LOW" level and set the tank to the unit.

~Turn

"ION"

the power switch.

For the first 4 sec., the boiling point setting temperatura is displayed on the IDigital Display

II

and the bar

display "--

-"

appears on the IDigital Display

III

' and then the set temperature, set time

or

the cycle is
displayed.
Press down the

handlij

and pull the Imovable handleltoward you to open the cover. Fill the chamber with

water until the end

of

the water level metal

of

the heater cover is immersed

in

the water. Put object(s) to be

sterilized in the attached stainless-steel basket, set

it

in the chamber and close the cover.

@Heating process (Process monitor lamp: "Heating" flickers.)

After checking the detail of the cycle and settings, press the ISTART buttonl. Then, "Beep Beep" sound is
heard and the power to the

~terilization

heate~

is

turned ON to heat the heating water and generate steam.

At this time, the air

in

the chamber is driven out by steam. The steam at that time is discharged into the

exhaust tank where it is condensed to water.

Also, excess steam which could not be condensed enough

flows into the back side exhaust tank at the back side

of

the unit.

After the

completion

of

air exhausting process, closing

of

the

c-x-;h:-:a-us-:-;t-v-::a~lvCle

fills the chamber with steam

and raises the pressure. After starting, the

COVER LOCK lam lights up and the cover can not be opened

due to interlock function.

@Sterilization process (Process monitor lamp: "Sterilization" flickers.)

When the temperature in the chamber reaches the sterilization temperature, the Isterilization

time~

starts

working. During sterilization, the tern erature in the chamber

is

detected by the lateral thermistor

(THI)

and

the power

supply to the sterilization heate is controlled by microcomputer. The temperature can be set

every

i'C

between 115'C and 135'C.

When the set

sterilization time elapses, the sterilization process ends and goes to the next exhaust process.

@Melting process (Process monitor lamp: "Melting" flickers.)

This process is for melting culture medium, etc. The temperature

in

the chamber is detected by the lateral

thermistor (TH

I)

and the power supply to the

~terilization

heate~

is controlled by microcomputer. The

temperature can be set every

I'C

between 60·C and 114"C.

@Exhaust process (Process monitor lamp: "Exhaust" flickers.)

<For INSUMENT STERI>

By shutting down the power supply to the

~terilization

heate~

and opening the lexhaust valvij, steam

in

the

chamber is discharged into the exhaust tank to perform

cooling.
This process is to be performed when the sterilization object is instrument, etc.
<For other than

INSUMENT STERI>

Shut

down the power supply to the

~terilization

heate~

and keep the lexhaust valve

~Iosed

so that the

temperature

in

the chamber

is

cooled naturally. When the tern erature

in

the chamber lowers down to the

preset exhaust temperature

(initial value

or

boiling pint), th exhaust valv opens.

This process

is

performed when the sterilization object is liquid such as culture medium, etc. The

sterilization object is prevented from spilling out due to burst boiling.

(l)Keep-warm process (Process monitor lamp: "Keep Work" flickers.)

The temperature

of

sterilization object such as melted culture medium

or

sterilized culture medium can be

set and maintained every

I·C

between 45"C and 60·C and the sterilization object can be kept warm for 72

hours. (The keep-warm process can be

completed by pressing the

!lTOP

buttonl.) The temperature in the

chamber

is

detected by the lateral thermistor (TH

I)

and the power supply to the Isterilization

heate~

is

controlled by microcomputer.

@Completion process

<LIQUID STERI cycle/INSTRUMENT STERI cycle> (Process monitor lamp: "Completion" flickers.)
When the temperature

in

the chamber lowers down to a certain level, the buzzer sound "Beep" is issued ten

times, and the bar

display"---"

appears on the IDigital Display

III

to inform the completion

of

operation.

<Sterilization/Keep-warm

cycle·

Melting/Keep-warm cycle> (Process monitor lamp: "Completion" flickers.)

After the

completion

of

keep-warm cycle, the buzzer sound "Beep" is issued ten times, and the bar display

"---"

appears on thel Digital Display

III

to inform the completion

of

operation.

-

18-

(4)Descriptions of safety device actuation

eCaution

sions

Caution

Sian

Disolav

Condition

Cause/Checkina/Remedv

Lid

Cover

is not closed comDletelv. Press down the handle by force.

When the

START button is pressed, the Press the START button after the temperature in

Hot

temperature

in

the

chamber

is

higher

than

the

the

chamber

has

lowered.

nreset temnerature.
Due to bending

or

clogging

of

the exhaust hose,

Pull put the exhaust tank and correct

HOSE abnormal pressure was detected more than 7

the bending

of

hose. Check the exhaust circun

times

durin"

heatin"

for anv cloaaino.

(j)Operation

is started without opening the

cover

(j)()nce open the

cover

and start the operation.

door

immediately after power-ON.

®Replace

the lock shaft detection switch.

®Trouble with the lock shaft detection switch

eError

sians

Enror

Sian

Disolav

Condition

Cause/CheckinaiRemedv

El

Lateral thermistor (TH1)

Lower than 21"C

Smin.

after the

bottom

' Check the thermistor (TH1).

Open

thermistor becomes 90·C. ' Check the thermistor (TH1) connector.

E2 Bottom thermistor (TH3)

Lower than

21'C

for

2min. after starting , Check the thermistor (TH3).

Open

and 2 min

elapsing.

' Check the thermistor (TH3) connector.

E3

Lateral thermistor (TH1)

Higher than

139'C

' Check the thermistor (TH1).

Abnormal temp.

' Check the Triack.

E4

Object

temp.

sensor

Higher than 140'C

' Check the thermistor (TH2).

(TH2)

Abnormal temp.

' Check whether or not the tip

of

the

object temp. sensor

lips

down into

the

heater

unit.

E5 Bottom thermistor (TH3)

• Higher than 110'C in heating

I,

• Check the thermistor (TH3).

Abnonnal

tamp

keep-warm process.

•

Check

whether

or

not

the

exhaust

port

• Higher than 120'C in heating 2,

is blocked with sterilization object.

exhaust

process.

•

Isn't

the

amount

of

heating

water

• Higher than 140'C

in

heating 3, heating

reduced

and

isn't

the

chamber

is

4,

sterilization

process.

heated wnhout water?

•

Or,

higher than

set

temp.+30·C •

Check

for

leakage

of

steam

or

water.

E6

Unlocking

of

the

movable

The detection switch is not turned OFF

•

Doesn't the lock pin catch?

handle

is

impossible.

even

when

the

power

supply

to

the

• Check the

cover

swoch.

solenoid

is

turned

ON

and

the

solenoid

is

unlocked.

E7 Locking

of

the movable

•

The detection switch is not turned ON • Doesn't the lock pin catch?

handle' cover

is

even when the power supply to the

• Check the

cover

swnch.

impossible.

solenoid is turned OFF and the

• Check the lock shaft switch.

solenoid

is

locked.

• Lid detection switch is turned OFF

during

operation.

•

Lock

shaft

detection

switch

is

turned

OFF durina oDeration.

E8

Abnormally high

•

Pressure

in

the

chamber

is

higher

than

• Sterilization object which makes the

pressure

about O.33MPa. exhaust difficult.

•

Pressure

in

the

chamber

is

O.04MPa

•

Exhaust

circuit

is

clogged.

higher

than

the

saturated

steam

• Exhaust port is blocked with the

pressure

in

the

temperature

of

the

sterilization

bag.

lateral

thermistor

at

heating 4 and

sterilization

processes.

•

Deep

sterilization

can

is

used.

E9

Low

pressure

•

Pressure

in

the

chamber

is

O.04MPa

• Shortage

of

heating water.

lower

than

the

saturated

steam

•

Exhaust

circuit

is

blocked.

pressure

in

the

temperature

of

the

lateral

thermistor

at

heating 3 ,heating

4

and

sterilization

processes.

El0

EEPROM communication

Nothing

can

be

read

out

or

written

from

• Check and replace PCB.

error

or

on EEPROM.

-

19-

-Hard

limiter
When the temperature in the chamber which was detected by the lateral thermistor (TH1) rises to higher
than

140'C, the Triack and the relay control circuit is controlled directly by TH1 temperature detection and

the power

supply to the heater is shut down.

This circuit is not

controlled via micro-computer and it is reset automatically when the temperature lowers.

(Actuated

in

all processes.)

-

Pressure

safety

valve

This valve opens to exhaust steam in the chamber and prevent abnormal pressure rise so that the pressure

in

the chamber should not exceed O.25MPa.

(5) Functions of specific parts and cautions

<Deaver

interlock

This is a safety device to prevent the user from opening the cover by mistake when the pressure in the

chamber is higher than the atmospheric pressure.
In order to check seating tightness between the lid and the chamber, micro-switches are mounted to their
lock shafts.

Also, 1 micro-switch is mounted for detection

of

the position

of

the solenoid

for

the movable handle lock and

2 micro-switches to the

lid for detection

of

lid open/close status.

-When

the cover is closed, the 2 micro-switches mounted to the lock shaft and the lid detects that the

solenoid is in the specified position, and "Beep" sound is issued and the operation turns to stand-by status.

-When the START button is pressed, the live solenoid becomes non-live and the end

of

the solenoid enters

the

hole

of

the movable handle. By so doing, the movable handle is fixed and at the same time, the

micro-switch is pushed by the end

of

the solenoid and the position

of

solenoid is detected to start the

operation.

(Cautions)

If the START button is pressed with the cover lock being incomplete, the caution sign

"Lid'"

appears on the digital display

of

the control panel and the buzzer sounds. This is to inform that the

lid is not closed up to the normal position. Therefore, the cover handle must be pushed down until

the buzzer sound "Short Beep" is heard .

• When the "Lid'" display appears, the following causes are taken account.

• Handle is not pushed down completely.
Since

the temperature in the chamber is high, repulsive force (force to open the lid)

of

the

chamber

lid packing is too strong to push down the handle .

• The chamber lid packing is removed and the lid bites a part

of

it.

®About

the

"door"

display

Lock shaft is closed when the cover is open (detection switch "ON"), the lock shaft opens once as the cover
closes (detection switch "OFF"), and it closes again (detection switch "ON") when the cover closes.
In

order to detect adherence to ON

of

the lock shaft switch, it is checked by microcomputer that the lock

shaft opens and then closes (detection switch turns OFF and ON.), and

if

it was not detected that the switch

is

OFF,

"door" is displayed.

(Cautions)

If the START button is pressed without opening the lid immediately after the power is turned ON,
the "door" display appears, but this is not due to any trouble. Close the cover once and then press
the

START button to start the operation.

-

20-

@Back side exhaust tank

When the water temperature in the exhaust lank rises

to

make it impossible to condense steam to water,
the steam is exhausted into the back side exhaust lank.
It is the back side exhaust lank that recovers the steam.

(Cautions)

When connecting the exhaust hose to the back side exhaust lank, be sure to insert it so that its end
reaches near the bottom of the back side exhaust lank.
The water

in

the back side exhaust lank returns from the back side exhaust lank to the exhaust

lank.

In

case of incomplete connection of hose, water remains

in

back side exhaust lank and the

water may

splash

in

all directions

in

the exhaust process.

@Thermostat

This is the final safety device to prevent abnormal temperature rise due

to

heating

of

empty chamber by

heater. The power

supply is shut down when this device works. The thermoslat is

of

manual reset type. The

actuating temperature is

145°C±5°C.

The thermoslat is mounted to the bottom of the chamber.

To

reset

it,

remove the unit side panel and the

reset button must be pressed

directly.

(Caution)

Since the thermoslat can not be rest at a high temperature, rest it when the chamber is cooled well.

@Chamber lid packing

Timing

of

the chamber lid packing replacement is 1 year as slandard. If deterioration of the edge, hardening,

remarkable deformation

or

lowering of elasticity is found, it must be replaced.
When replacing, tum OFF the power supply and then remove the chamber lid packing from the chamber
lid.
Make sure that no foreign matters such as dirt, etc. are sticking

to

the new lid packing and the lid before

mounting the packing

to

the chamber lid.

-21-

8.

About Various Modes

Models MLS-3751 U3781 L are equipped with the following modes. As for the detail, refer to the pages

of

respective modes.

Setting mode: Display

of

processing frequency,

history

of

errors, etc. and settings. etc.

Test mode:

Display

of

temperature and pressure in the chamber, adjustment

of

thermistors,

pressure sensors, etc.

Demonstration mode:

Display

of

actual operation status and demonstration

of

operation, etc.

-How

to enter into the setting mode

1.

Tum

ON

the power switch.

2.

When the

".A.

"+

"SET/CONFIRM" buttons are pressed for

about

2 sec. while pressing the "START" button, "Short Beep

x

3"

sound is heard and at the same time the decimal point

on

the Digital Display I flickers. (See the right figure.)

3.

After the status has become such as

in

2, when the "START"

button is pressed within 5 sec. while pressing the

".A."+

"T"

buttons, "Beep· sound is heard, and at the same time the
mode becomes the setting mode and

model name and speech

language are displayed.

-How

to cancel the setting mode

flicker

"c

sterilization

1-

1

When the power switch

is

turned

OFF,

the setting mode

is

cancelled.

Or,

when the "STOP" button

is

pressed to enter into the test mode and the operation

in

the "How to cancel the test mode·

is

performed,

the setting mode reset to the

normal mode.

-How

to enter into the test mode

A.

In

stand-by display

Enter into the setting mode according to the procedure

in

the
"How to enter into the setting mode" and press the "STOP"
button. Then, "Beep" sound

is

heard and at the same the
mode changes to the test mode. The difference from the
normal mode is such that the decimal point

on

the Digital

Display I lights up. (See the right figure.)

B.

In

operation

When the procedure

in

the "How to enter into the setting

mode" is performed during operation, "Beep· sound

is

heard

and at the same time the mode changes to the test mode.

-How

to cancel the test mode

Flicker

Light-up

Sterilization

I

51e

.lizati~

12

1

0:2'1

"c

Time

When the power switch

is

turned

OFF,

the test mode

is

cancelled.

Or,

when the "START" button is pressed

for about 2 sac.

while pressing the

".A."+

"SET/CONFIRM" buttons, "Short Beep

X3"

sound

is

heard and

at the same time the test mode returns to the normal mode.

-How

to enter into the demonstration mode

1.

Turn

ON

the power switch.

2.

Start the reservation operation.

3.

When the "Cycle selection" + "STOP" buttons is pressed within 5 sec. after starting the reservation
operation, "Beep Beep Beep· sound

is

heard and at the same time the stand-by

is

displayed and the

mode changes to the demonstration mode.

-How

to cancel the demonstration mode

When the power switch

is

tumed

OFF,

the demonstration mode is cancelled.

-

22-

(1)About the setting

mode

In

the selling mode, product infonmation, factory setting, processing frequency, history

of

errors, boiling point

setting, exhaust setting, address, option

I,

option 2 and channel display frequency setting and checking can be

perfonmed.

II

Mode

(j)Product

infonmation

I~FactOry

setting

@Processing

frequency

I@HistOry

of

errors

@Boiling point

setting

I@AirpUrge

IClJAddress

I@OPtion

1

I@OPtion2

@)CH

display

frequency

II

II

Operation

When the

"SELECT"
button is pressed,
the mode progress

(j)

.... ~ •••

@)

....

(j).

II

-

23-

I

Display

II

3

18

'

Preset model

name

and

speech

language

is

I""""--==--"""""-:=::::-idisplayed.

E

9

(In

factory.

English

has

been

n

sel

for 3751

or

3781.)

:::~[:::L~:~~r~:I'CLr"

is displayed.

F'_',-,L""",-,L"""......,=alProcesSing

frequency

o is displayed.

'------""""

...

IE

01

History of errors

is

I:!.

"""~

___

--''''''''''.

displayed.

bP

100

RPe;

8 1

SR

0

OP

,

1FbO

OP2

FFbO

Preset boiling point is
displayed.

(In

factory,

boiling point has

been

set at 1 00"(;.)

Preset

air

purge

time

and

heater

OFF

temperature

are

displayed.

(In

factory,

they

have

been

set 8 min.

and

7"C,

respectively.)

[ H

3000:

Preset

CH

frequency is

displayed.

(In

factory,

he

frequency has

been

set at

3000

imes.)

(2) About sub-mode

(j»roduct

information

II

Mode

II II

Operation

II II

Display

II

IQ)Model

name

and

speech

language

3

18

'

"3781"

or

"3751"

is

displayed.

"JPn"

or

r

.......

E

...i-

n

"""'"-_

g

~·Eng.

is

displayed.

display

!

Preparation date
display

(Note)

!

3 ersion display

(Note)

!

Time button

Time button

Time button

2

0 0

1

"200703.

13"

is

displayed.

(March

13,

~~~~"""'"--3~2007)

or

fen

is

O 3

'

operated.

•

U

E

"VEr 1.19"

is

r displayed.

f---

....

":-I.-""

.. ,=-'-g=l

(Version

1.

19)

"Model name can be changed by pressing

the·

...

·or

"T"

button during

CD

the model name and speech

language display.

"Speech language

can be changed by pressing the ·SET/CONFIRM" button and

the"

...

·or

"T"

button

during

CD

the model name and speech language display. When the "SET/CONFIRM" buttons are

pressed again. the

model name can be changed ...

"When the

·START" button is pressed while pressing the ·SET/CONFIRM" button, the content

of

the

change is written in

non-volatile memory.

"When the

"TIME· button is pressed, the mode changes

in

the order

CD-+®-+@-+CD"".

"When the "OBJECT

TEMp·

button is pressed during the product information display, all the LEOs are

light up.

«Note»

® Preparation date and @ Version display are altered depending on the specification charge.

~actory

setting

"When the "START" button is pressed while pressing the "SET/CONFIRM" button, the alarm sound ·Beep

Beep Beep" is issued, and the setting is defaulted to the factory setting. When the "START" button is
pressed again

while pnessing "SET/CONFIRM" button, the setting is defaulted to factory setting.

The

following items

ane

subject to the factory setting:

(1

)Setting values for each cycle (sterilization temperature, sterilization time, etc.)
(2)Error information and frequency
(3)processing fnequency
(4)Boiling point and air purge settings
(S)Address
(6)CH

display fnequency

-

24-

@Processing

frequency

Total frequency

In the process frequency display, the total frequency

of

all cycles

and the processing frequency

of

each cycle are displayed.

•

Each time when the "TIME" button is pressed, the processing

frequency of each

cycle are displayed.

R

··ALL" stands for the total frequency, and

"cSl"

for LlQUD STERI,

"cS2"

for STERI KEEP WARM, "cS3" for MERT/KEEP WARM

and

"cS4" for INSTRUMENT STERI, respectively. C cle-wise

Processing

frequency

·When

the "START" button is pressed while pressing the

·SET/CINFIRM" buttons, the total processing frequency and
operation frequency

of

each cycle are cleared.

C S ,

"--r--I~Cycl~e---.J1

1"""''--'' ...... _..0.....,=1

L-

___

--=''-'''O.....,H

~~c:~~

I

@Hlstory

of

errors

Error No., error code and error occurring process No. are displayed.

The latest error data is displayed in the first place.

•

The error No. is changed by pressing

the"

...

·or

....

" button and

the history

of

errors can be checked.

The error No. can be recorded for 8 in number

at

the maximum.
If more than 9 errors occur, the oldest error is deleted and new
error is recorded instead.

E

6

t

·When

the "START" button is pressed while pressing the

·SET/CONFIRM" button, the error data is deleted.
(Total

errors are not deleted.)

I Error code I

.Error

Codes.

2

+-t

Error

No. I

04--

Error

occurring

process

No.

1 :

Lateral

thermistor

(TH1)

Open

2 :

Bottom

thermistor

(TH3)

Open

6 :

Movable

handle

Unlock

impossible

7 :

Movable

handle

and

lid

Lock

impossible

3:

Lateral

thermistor

Abnormal

temperature

8:

Abnormally

high

pressure

4 : Object temperature sensor

(TH2)

Abnormal

temperat

9:

Low

pressure

5:

Bottom

thermistor

Abnormal

temperatura

10:

EEPROM

communication

error

<

Error

occurring

process Nos.>

Process

No

Error

Occurring

Process

Description

Process

No

0

Stand-by

6

1

Reservation

7

2

Heating 1

Up

to

90"C

8

3

Heating 2

From

90<>C

to

boiling

poin1

9

4

Exhaust

10

5

Heating 3

THl

temp. rises

up

to

11

the

preset temp.

@Boiling

Poing

setting

Change the boiling point temperature according to the altitude

of

the place for installation by pressing

the"

...

·or

.....

button.

·When the 'START" button is pressed while pressing the

·SET/CONFIRM" button, the content

of

the change is written in

the

non-volatile memory.

(The

boiling temperature has been set at 100"C in the factory.)

Error

Occurring

Process

Description

Heating 4

TH2 temp. rises

up

to

the preset temp.

SterilizationlMelting

Cooling 1

Down

to

boiling

point

Cooling 2

Before

cooling point

Keep warm
Completion

bP

,

~OH

Set

temperature

I

• When setting the boiling point, refer to the table (P

__

)

of

the altitude and atmospheric pressure in the

standard atmosphere and the

boiling point of water.

-

25-

@Exhaust

setting

-Heater OFF temperature can be changed by pressing

the"

."

or

"T"

button.

(Heater

ON

temperature is fixed at the boiling point temp.+1

"C.)

-When

the"

."or

"T"

button is pressed while pressing the

"SET/CONFIRM" button, the exhaust time can be changed.

-When the "START" button is pressed while pressing the
"SET/CONFIRM" button, the content

of

the change is written

in

the non-volatile memory.

<!lAddress

-Address can be changed by pressing

the"

."or

"T"

button.

This address is used for connection

of

the MTR system.

-When the "START" button is pressed while pressing the
"SET/CONFIRM" button, the content

of

the change is written

in

the non-volatile memory.

@Option

1

-Change bit is selected by pressing

the"

• "or

"T"

button.

-Preset

value can be changed by pressing the "TIMER" button

-When the "START" button is pressed while pressing the
"SET/CONFIRM" button, the content

of

the change is written

in

the non-volatile memory.

@Optlon

2

-Change bit is selected by pressing

the"

• "or

"T"

button.

-Preset

value can be changed by pressing the "TIMER" button

-When the "START" button is pressed while pressing the
"SET/CONFIRM" button, the content

of

the change is written

in

the non-volatile memory.

@lCH

display

ferquency

CH

display frequency is set. (CH is displayed when the total
processing frequency exceeds the CH display frequency.)
4 kinds

of

frequency

of

1000

..

2000

..

3000 (Factory setting)

..

9999.4 can be selected.

-

When the

"T"

button is pressed, the frequency decreases and

when

the"."

button is pressed, the frequency increases.

-When the "START" button is pressed while pressing the
"SET/CONFIRM" button, the content

of

the change is written

in

the non-volatile memory.

«Note»

Do

not set 9999.

-

26-

RP[j1

B 1

Heater

OFF

temp.

SR

o

OP

,

lFbO

i

I

Change

bit I

I

Preset

value I

OP2

FFbO

i

11..)-_---,

I

Preset

value

I I

Change

bit I

[H

3000

(3) Functions

of

test

mode

1.

Minute temperature display

When displaying the current temperature, the
value after the decimal point is also displayed.

2. Expansion

of

temperature setting range

Temperature can be set from

20"C to 150"C.

Error is prohibited by the sterilization limiter.

1

Displays

112.3"C.

Set value can be changed even after heating process.

3. Remaining time

display in exhaust process

Exhaust remaining time is

displayed on the Digital Display

II.

(in min.)

4. Pressure/Saturated steam pressure

display

1-

, L

I

By pressing the "TIMER" button, the current pressure is the Digital Display

I.

(in kPa)

5. Forced exhaust

12°31

I

By pressing the "A" and 'STOP" buttons at the same time during stand-by, the exhaust valve opens.

The forced exhaust can be

cancelled by pressing the "STOP" button.

6.

TImer 60-time speed operation

While the "TIMER" and the "SET/CONFIRM" button at the same time, the reservation timer, process
timer and

sterilization timer operate in 60-time speed. (It is preferable to perfonn the exhaust fast.)

7.

sterilization process starUcompletion signal output

Buzzer sounds at the start and

completion

of

the sterilization process.

(4)Functions

of

demonstration mode

1.

Power is not supplied to the heater.

2. Process timer and

sterilization timer operate

in

60-time speed.

3. When the power is

supplied to the heater, the temperature on the Digital Display rises automatically.

4. When the power is not

supplied to the heater, the temperature

on

the Digital Display lowers automatically.

(For safety sake, however, the temperature does not

lower than the actual temperature

of

TH1.)

5. Pressure

Abnonnal is not detected.

-

27-

9.Temperature and Pressure Adjustment and Checking

(1)Adjustment

of

thermistors

The temperatures

of

the lateral thermistor, object temperature sensor and botlom thermistor can be

corrected manually. The temperature

of

the lateral thermistor has been corrected in the factory in advance.

Use the displays

if

the correction

of

temperature is necessary for validation,etc. The correction

of

temperature is performed

at

3 points, namely, 105"C, 121"C and 135"C.

For prevention

of

heating without water, check the heating water amount.

*Instrument

to

be

prepared*

Thermometer that has been calibrated by temperature recording meter, etc.

Since the temperature

is

corrected

on

the

basis

of the temperature indicated

by

the thermometer, prepare

an

accurate

thermometer.

The

correction of

temperature

is

performed

as

minute

as

0.1

OC.

II

Operation

I

Enter into the test

mode.

I

+

Select the instrument sterilization
cycle and set the sterilization

temp.

to 105'C

and

set the

sterilization time

at

1 hour.

t

Press

the

START

button

I

Reaching 105'C

The correction

of

temperature is

displayed only while the TIMER

button is pressed. When the
SELECT button is pressed while

pressing

it,

the

display changes

in

the order

of

-Lateral

sensor-

Object temp.

sensor-Bottom

sensor-Press. sensor. Select

the thermistor which you want

to

adjust.

+

Press

the • ......

or·

A" button

while pressing the TIMER button,
and adjust the temperature so

that it becomes the

same

temperature as the value

indicated

on

the

thennometer.

+

When

the START button

is

pressed

while pressing the

TIMER

button.

the corrected

value is written in.

Description

II

ISet the cycle, sterilization temp. I

land time.

l

:like~

in

the normal operation,

heating,

I

and

exhaust

processes

are

rmed.

and

sterilization process

ISelect the thermistor you want

to

I

ladjust.

(See

the right figure.) I

I

Adjust at

105"C.

(Correction)

Adjust at 1

05"C.

(Writing-in)

-

28-

I

II

Display

~

EXSmple

of

normal

diliPlay

1 +

NO" I

tO

5E

I~

0:

,y

l

LEFT

I

Release.

~

r

TIMER

I L button

Example

of

'-==

.....

1.

oom>cIIon

Lateral thermistor

Press.

Obj

••

, '.mp.

wi

SELECT

button

I

sensor

NO"

I

to

YB

loc

TIMERI

3

00

1

Bottan

thermistor

~

SELECT button I

NO"

I

to

6

'S

loe

~

3)

00

1

EXHAUST: lateral thermistor 3 :

105"c

TIMER: Object temp. sensor 4 :

121"c

LEFT: Bottom thermistor 5 :

135"c

II

1

Press

the

SET

LCONF I RII

button

to

set

the

sterilization

temp.

at

121''c.

Reaching

121

Perform

the

121"C

correction

in

the

same manner

as

the

correction

at 1

05"C.

Press

the

SET

LCONF I RII

button

to

set

the

sterilization

temp.

at

135"C.

Reaching

135

Perform

the

1350C

correction

in

the

same manner

as

the

correction

at

105"C.

Set

the

sterilization

temp.

"C

and

sterilization

process

Adjust

the

temp.

to

121

"C

after

going

to

the

121

etc

sterilization.

Set

the

sterilization

temp.

"C

and

sterilization

process

Adjust

the

temp.

to

135"C

after

going

to

the

135"C

sterilization.

-

29-

Example

of

the

lateral

thermistor

correction

display

(in

121"C

correction)

NO"

I

[2

IE

loc

""'""1

11

02

1

(2)

Adjustment

of

pressure sensors

Pressure correction

of

the pressure sensor can be performed manually.

Pressure correction is performed

at

2 points, namely, in the status with the lid being opened and at 135

DC.

For prevention

of

heating without water, check the heating water amount.

II

Operation

II

II

Description

II

II

Display

II

I

Enter

into

the

test

mode

.

..

Fix

the 2 shafts

found at the back

side

of

the cover

by

tape,

etc.

and

set

it

to

ON status.

t

Close

the

lid

once

and

then open

it.

..

Press

the START button

with

the

cover

being

opened.

The

correction

of

pressure

is

displayed only while the

reservation button

is

oressed.

When

the

cycle

selection

button is pressed

while

pressing

it,

the

display

changes in

the

order

of

-Lateral

sensor-Object

temp.

sensor-Bottom

sensor-

Press.

sensor.

Select the

pressure

correction

display.

Press

the

~or

"a" button

while

pressing

the

reservation

buttu

I

and

adjust

the

pressure

so

that the pressure display

valu

becomes

'P. 0'.

When

the

START

button is

pressed

while

pressing

the

reservatm

buttu

i,

the

corrected

value

is

written

in.

Press

the

STOP

butIpn

and

remove the

tape

from

the

shaft.

I

For

adjusting

the

pressure

when

the

pressure

is

0 (cover 'Open').

Selection

of

the pressure

correction

display

(See

the

right figure.)

Pressure

adjustment

(Correction)

Pressure

adjustment

(Writing-in)

-

30-

Normal display

Release.

Raserv.

Press.

button

Example

of

]

nannal display

Cycle selection

button

~

Lateral

thermistor

correction

display

(

Cycle

selection

button

1

I Object

temp.

correction display

[ Cycle selection J

button

Bottom

thermistor

correction

display

Example

of

pressure

Cycle selection J

correction display

button

'-

e.

1

rn

(j

\

]

/ \

Pressure display value

Corrected value

Select

the

instrument sterilization

cycle

and

set the sterilization

temperature at 135'C

and

the

sterilization time at

30

min.

Close

the cover

and

press the

STRAT

~.

Set the cycle, sterilization temp.
and

time.

OC

and

sterilization process

Reaching

135

Press the

"V"or

",6."

button

while pressing the

SET lCONFIRM button

and

adjust the pressure

so

that the

pressure

display

becomes

same

as

the

value

on

the pressure

gauge

of

the

product.

When

the

START

button

is

pressed While pressing the

SET

/DISPLA

Y button I the

corrected

value

is

written

in.

Pressure adjustment

(Correction)

(See

the

Mght

figure.)

The pressure gauge

of

the

product shows the pressure

in

MPa

and

the pressure display

value

in

kPa.

Pressure adjustment

(WMting-in)

-31-

Nonmal

display

Release.

SET/COFIRM

Press

Example

of

pressure

correction

display

button

Pressure

Corrected

display value value

(3)01ecklna

the

safety

valve

operation

'Checking procedure

of

the safety velve operation

I. Enter into

the

telt

mo'"

As

for

the

.ntwirllllMlthod. _

ttl.

PIIP

d.scribirc

th.

wit

mod

•.

2.

S.I.ct

the

in.tn.n.nt

.t.iliution

cycI

..

..t

th •

.twiliution

w~nrtlnl

.t

140"C

.nd

the

.u.riliution

tim.

at

10

min . ..,d

ltart

th.

opwGon.

3.

Wh.n th

........

It

p

___

is

owr. th •

..r.ty

wI¥.

i

••

ctu.t.d

at.bout

l4O"C1O.2tlMP.

to

b.lch.w.m

from

th,

*k

IIidI.

4. Wh,n

th,

QOI'Ifimation

if;

cornplmd

.•

.t

the

ltlriliz.tion

temp,r.tu

...

at 135'C

..,d

th,

.t.ilization

tim,

.t

1

min.

5.

Wh,n

th,

proeM,

i.

complil'tlld thelL,,"

the

,xhaLllt prac

...

IftIr

ttl.

complfiion

of

the

ItlriliDiion

pl'OCOlu.

tum

OFF

th,

~

to

oomplm

the

confimlltion.

(4)Conformatlon

of

the

THl

and TH3

temperature.

When

the

'''''and

.....

butlDns 818 pnIIIslKI

at

the same time,

the

TH1

temperature

ill displayed

on

the Digital Display I end

the

TH3temperature

ill displayed

on

the Digital Display

II.

-

32-

-~-

NOW

12
12

I

"

I
I

I

10. Thermistor Temperature Characteristics /
Altitude,Atmospheric Pressure and Boiling Point in standard Atmosphere

-Thermistor

temperature

characteristics

Th1·Th3

Standard Standard

Temp.

"C

Resistance

Temp.

"C

Resistance

Value M? Value k?

-10 9.71

30

1085

-5

7.17 35 854
0 5.33 40 676
5 4.01 45 539

10 3.03 50 433

15 2.32 55 349
20 1.78 60 283
25 1.39 65

231

Standard Standard

Temp.

"C

Resistance Temp.

"C

Resistance

Value

k?

Value

k?

70 189.2 110 45.3t
75 155.9 115 38.6f
80 129 120 33.04
85 107.3 125 28.34
90 89.57 130 24.35

95 75.12 135 21.0f
100 63.26 140 18.2
105 53.48 145 15.84

-

Altitude,

atmospheric

pressure

and

The

Boiling

point

of

water

in

standard

atmosphere

Altitude

Atmospheric Pressu

..

Altitude

Atmospheric

Pressu.. I Boil!n_!!

Point

(hPa)

(nmHg)

(

"C)

(m)

(hPa)

(nmHg)

-382 1060 795.0 101.27 1900 805.2 603.9

-300 1049.0 786.7 100.99 2000 795.0 596.3

-200 1037. 777.8 100.66 2100 785.4 589.1

-100

1025.2 768.9 100.33 2200 775.8 581.9

o 1013. 760.0 100.00 2300 766.2 574.7

100 1001.4 751.1 99.67 2400 756.6 567.5
200 989.5 742.2 99.34 2500 746.9 560.2
300 977.6 733.3 99.01 2600 737. 553.3
400 966. 724.6 98.67 2700 728.5 546.4
500 954. 716.1 98.34 2800 719.3 539.5

61

943. 707.5 l8. 2900 7' 532.'

~.

MO

5

320

47 .

825.

46

..

815. .5

l4.)5

4000

,.4

46

..

• Environmental conditions for

use

of equipment

Atmospheric pressure

701.1

- 1013.3hPa

(

"C)

93.72

93.39

93.06

92.73

92.40

92.07

91.74

91.41

91.08

90.75

!7.

-As

for the conversion of the atmospheric pressure(hPa(mba)

and

mmHg), see the following formula:

1 mmHg=13.5951 X980.665X1 O"'hPa(mba)

-As

for the calculation of the boiling point, see the following formula:

Boiling point =100+0.0367(P-760)-0.000023(P-760)2
P:

mmHg

-

33-

11.Citcuit Diagram

CD

I

~

:1

=

~

t~

®

I

I

0)"

22OV123OV

·

"

"

•

·

--

·

,

®

--

I

-

I

I

EMCPCB

Current

fuaa

x 2

'5OV

SA

I

I

AC

power

IlUpply

~

datecIIon

circuit

;M

'!'i'

Voltage

drop

detection

cirtlUit

Sterilization

heater

1900W

: 3751 L(12OV)

2000W : 3751,3751

L(230V)

"~

400OW:3781,3781L

nnnn

limiter

_

uuuu

~o--

=

@ ®

-*-iY

-

-

Heater detection

Main

relay

ITriKk~""'"

I

circuit

control

circuit

circuli

MlcrocompulBr

abno

CD

Power

cord

@Triac

®

Tanninal

block

0)

Power transfonner

®

Power

switch

®

Protective grounding

®

Power

relay

@Coil

----j

Ud

switch

Fan

I

Display·Operation

--1

Ud_h

I

,-

PCB

'-""<ow

TH1

TH3

Fan

control

I

circuit

I

5

kef'

I I

Lateral

temp.

I I

Low

temp.

pea

sensor sensor

IComm~onll

Sound

II

T

__

II

To~"""~

Circuit

circuit

d'cult

circuit

"''''''

...

12V

DCpower

E'!

5V

detection

circuit

all

Hard

limiter h

I I I

7

·

"

"

•

·

·

,

>A

IlUpply

circuli

-'!.5V

I

L~

OV

CommutaUon

circuit

.-

-

~

I,

S<>Ieoo;d

III

Sol~'"

wlw

.-

.-

=1

Co~=on

control

circuit

control

circuit

-

DC88V

1

8:23OV

4

:22OV

3 :200V

2:

OV

6:

120V

3:

110V

2:

OV

I I

I SolenoKj I I

~:st

I

I

Microcomputer & Control Section

I I I

1

Commutation

circuit

1

ComrTMJtation

circuit

Commutation

1

circuit

Lid

detection

I I

PrMeure

dIlecIion

11

Tamp.

dllectlon

circuit

circuit

circuit

Control PCB

l '-""<

"'all,

I

delecllon

SY!Ich

I

~

'-""<

"all,

I I P

....

,..

I I

Objed

tomp_

Printer

del8clion

swim

sensor

sensor

0 n

Option

ptio

TH'

tenninal

12.Troubleshooting

is

not

when

the

is

turned

ON.

Checking point

by

tea

..

,

Check the conductivity

F

....

• od<el

of

housing set

(1)

main power billa

•.

If

the

breaker

Is

OFF, tum

nON.

(2) Check the power cord for any breakage.

If broken, replace

the

power

cord.

(1)

i

the

P0'NW5Upply.

Tum OFF

the

main

power supply

and

turn

ON

the power

switch of the

unit,

and check the conductivity.

If

not

conductive, replace

tha

power switch.

(2) Check the lead wire for removal

or

looseness.

ENTERA

(or

CE).

;

Check tha

lead

wire for breakaga .

-

35-

(2)

iIIILid"

appears on the

dsplay

and

procesl

doe.

not

start.

1) Check the 2 shafts mounted

to

the

nd.

Push the shafts to make sure that

they

slide

In

and

out

smoothly.

Shafts

If the shafts

do

not slide smoothly,

2) Check the position of the both lock

shah.

Lock

shafts

(1) Check the springs lItted to the shalls.

(2) Apply

grease

to the shaft sliding perl

When the

cover

is

opened,

(1) Check

if

the shalls are

in

due position

On

just

about vertical position).

(2)

Check

if

the lock shafts open when pushlld outward and

they

retum to the original position by spring force when

relaased.

If they can not move normally,

(1) Remove

any

foreign matter which

is

pinched and

jams

the

.hall

(2) Replace the spring, etc. If

In

trouble.

(3) Apply

grease

to the shaft sliding perl

-

36-

Between Black 1

and

2

Between

Black 3 and White 1

Detection switch

Socket

of

the

housing

H1:

Conductivity checking
positions

• Detection switch 1

Between

Black 1

and

2

• Detection switch 2

Between While 1

and

Black 3

• Wire Nos. are
Indicated

on

the

connectors.

i.,.,,;~

awIlch

Is

not conductive

housing

set

M.

;

lead wire

for

breakage.

housing set

OS.

-

37-

ON,

replace the

replace the

Check.

the

connection.

Check that the housings in the same color

are

connected.

(3)

"___

..,.,..,..

on

the

_ even when

the

cover

Is

closed.

1)

Check the Items 2) and

3)

of

"L.Jd"

appears on the display Correct

Kif

In

trouble.

and

does not start

2)

Check. the conductivity the switch when the both lock shafts Since the switch is turned OFF when

the

lock shafts open, the

switch

Is

not conductive.

If

the

switch

is conductive, rwplace the housing

set

M.

(5) _

is

not

..

""....

to

tho

twater.

1) Check the exhaust hose.

Check.

if the hose is bent

or

clogged in the product when

exhaust 'lank

Is

Installed. Correct

Kif

bent

or

clogged.

2)

Check the hose

in

the exhaust tank. Check

if

the hose is bent

or

clogged.

Correct

Kif

bent

or

clogged.

3)

Check

if

the exhaust hole

i,

blocked with

any

sterilization Remove it

if

the exhaust hole

is

blocked.

otfect

or

sterilization bag.

-

38-

Check the resistance

value

bet¥Men the

terminal block 1 and
relay- 6.

1 and

D.

,,-f- Press hera.

(8) ''!me"

"-"""

on tho

_.

(1) Since does not operate

in

spite that the voltage

is applied, replace the exhaust valve.

If

the voltage is

OV,

(1) Check the connection of

the

housing set W

or

V.

(2) Replace the "PCB set,

controlTH

set".

7.6Qfor

3751

L (12OV),

13.2Qfor

3781L

26.5Qfor

3751L (230V) and 3751.

If

not,

replace the heeler.

(1)

C;;eck.1~'

~)",;"g"'

.. "'b'y I 3781

CE

for connection

and

breakage.

(2) Replace the

relay.

''''''''

OV.

(1) Check the housing assemblyB120 3751 or 8220 3781

or

8230 3781

for

conneclion

or

breakage.

(2) Replace the

Triac.

(3) Replace the "PCB set,

controlTH

set".

chamber.

It can

be

restored

If

a "Click" sound Is heard.

Check the Item.

1)

- "') of

·Power

is not not

.upplied

to the

If

any trouble, correct

it

heeler."

-

39-

(7) Steam leaks

from

the periphery

of

the chal'l"tter.

1) Check the

chamber

lid packing and

the

chamber hard

top

(1) Clean the contact pari of

the

packing

and

chambertop.

(8) Steam leaks

from

pipe and joint.

(2) Clean the contact pari of

the

packing

and

chamber

lid.

(3) If the

chamber

lid packing

Is

deter1orated, replace

It.

1) Check the heater mounting

pari

(lower side

of

the

chamber)

If

nuts

are

Iooeened, retighten them.

for

steam

leakage.

Checking positions

2) Check

the

pipe connection (1)

If

the

connection Is loosened, retighten

It.

2 If

the

hose band is loosened, lace it.

(St)

Open

error

(E1) occ

.... , at

the lateral

thermistor

(TH1).

Abnonnal tern

erature

rise

of

the

lateral

thermistor

E3

occurs.

1) Check

the

connector connection (1) Check

if

the

socket

is

inserted completely.

2 Check

the

lead wire for brea 8.

2) Check the resistance value

of

the

lateral thermistor (THl) Remove

the

connectors from

the

"PCB

_,

control

Checking points
bvtester

completion" and check

the

resistanoe value beiw8en the

terminals of connector side.

Resistance

range (90 -

Ilot):About

SO.O-

41.60)

3 Trouble with the "PCB set, conIroI

TH

set. Re lace

the

"PCB aet, control

TH

set".

(10) Abnormal

t.

.ratur.

of

the

ob".ct

t.m

.rat

.....

s.nsor

(TH2) (E4.occurs.)

1) Check

the

resistance value

If

the

object temperature sensor Remove

the

connectors from

the

"PCB set, control

Checking

points

bv

.....

2 Trouble with the "PCB

set

control

TH

set"

completion" and check

the

resistance value between the

terminals of connector side.

Resistance

range (90 -

Ilot):About

SO.O

-41.60)

Re ace

the

"PCB control

TH

set".

-

40-

(11) Abnonnal

teQJerature

of

the

bottom

thennlstor

(TH3) (E5 occurs.)

1 Check

the

heBlin water amount

in

the

chamb...

If the heati water

In

the

chamber

is d

....

Bled, re enish

it

2 Check.

the

nem

of

"steam leaks from I e and oint."

Re

Ir the

steam

leakl

rl

.,

....

+- SolenoId

Between White 2 and 3

connection.

Housing set

DS

Detection switch

Conductivity

checking

posilions

• DetecUon switch 1
Between White 2

.oo

3

* Wire Nos.

are

indicated

on

the

connectors.

I

(1) Check connector insertion of the housing set

X+

U(3751)

or

D + T(3781).

If

not completely Inserted,

correct

n.

(2)

Check

the resistance value between the terminals

of

the

solenoid.
Range

of

resistance value: 160 -

1852

In

cue

of

short-an::uit

or

breakage, replace the solenoid.

(3) Check.

If

the

lock pin

Is

caught. Apply grease.

incomplete

short-circuited

with

housing

set DS.

lever

being retumed, replace the

-

41

-

Movable handle and lid lock is

not

BeIw'I!Ien

White 1

and

Black 3

r

Checking position

Detecllon switch

Conductivity checking
poanlons

• Detection switch 1

Between Black 1
and 2

• Detection switch 2
Between

WhKe

1

and Black 3

• Wire Nos. are
Indicated

on

the

connect0r5

;

for engagement

of

the lid.

If

not caught,

(1)

Remove

any foreign matter, which maybe

sticking.

(2)

If

the

lock

shall retum spring

is

weakened, replace

it

(3)

If

the

lock

shaft

does

not

move

smoothly, apply grease.

Check

the condudivity of

the

switch

when

is

closed. If

no

conductivity,

(1) Adjust the switch mounting

poaition.

(2) If

no

conductivity

is

found ever when the lever is pushed,

replace the housing set

M.

If

no

conductivity,

(1) Adjust

the switch mounting position.

(2)

If

no

conductivity

Is

found ever when the lever

Is

pushed,

replace the housing set

OS.

-

42-

4)

Check

the

housing aet.

5 Trouble with the "PCB

set,

conlrOl

TH

ser

e Trouble with the "PCB s dis la

'--

+- Pressure

sensor

(15) Pressure

is

low. (E9 occurs.)

Check the housing set Y(3751)

or

(3781), housing set

X+U(3751)

or

D+T(3781)

fo~

connection and breakage. If

Incomplete connecUon

or

breaKaae Is found, correct

n.

Re

ace

the

"PCB set, control

TH

set".

Re lace the "PCB set,

dis

I

..

nSOl'".

I 1) Check

the

Items 2)

and

3)

of

"Abnormally high pressure". I If

any

trouble

Is

found, correct

It.

(18) Data can

not

be read

from

and

written

in memory. (E10 occurs.)

I 1) Trouble with the "PCB set, conlrOl

TH

set. I

Replaoethe

"PCB set, control

TH

set".

,l,.....,.-

Voltage (DC)

p,...

+-

Voltage

(Ae)

Checking point

Checking point

which connects

incompl&la

(2) Check

the

voltage between "+V" and

of

the

power

supply unit to make sure that

about

W is outputted. If not,

raplace

the

po'W'8I"

supply unn.

,correct

it.

-

43-

(18)

No

sound Is Issued.

1) Check the lKlund setting.

2) Check the resistance value

of

the

speaker.

Checking

point

by

tester

3)

Check the housing set.

4) Trouble with the "PCB set, control TH set"

If

it

is

set

at

sound waming mode, change the lKlund volume

to

~Loud"

or "Medium"

to

check that the sound is issued, and

tell the customer that the sound Is not

luued

In

sound warning

mode duri

normal 0 eration.

Check that the resislance value at the both ends

of

connector

isabout8Q.

If

short-circuit

or

wire breakage

Is

found, replace the speaker.

Check the

housing set X+U(3751)

or

D+T(3781)

for

incompleted connection and wire breakage. If any trouble

is

found, correct it.

Replace the

~PCB

set, control TH set".

Date

and

time

~a~

re~re

~.~

e~t~.------I~Oal~~~r"~"'!"'!'"!'''h\li'"'iiiOiiTW.Tci8diLl

If

lowar than

Ie pushi ng

the

-

44-

13. Disassembling Procedure

..

ThIo

p/'IcIII)t

1n

....

1Igurw

.....

,iPIIf)

....

MocIaI

MLS-37B1L

which

may

dif'fwtcrn

....

Model

MLS-3751Llnh

m.mber~Ia'IMS

.

&'CAUTION

&'CAUTlON

WIwI , 1M

.... . ....

&

_ •.

.

...............

~

lie

produr:t,

~

.I s

OA.

ncJt

lie

PIOM:t.

De

..-e

w unpkig the

""-"",,,,,

.L

GOld

hili

..

will

kl9111

~

by

ftrp

......

edgiI.

w.r

(1)

~

tM

pacldnl;

fIf

the

churDer

CD

IJiarnaurf: the paddng

of

....

chember.

(~.-1

)

&.

CAUTION

CheQ the coating

of

adhMiYe before

..

mounting

••

pply adhutve (KE-44T) If

""'0'«1. Apply the

adh

..

~

to

all

over the

edge

gf'OCMt

. (See FiII.-2) (Drying time: 12

hou ... l

(J) DlIftIOIIItInc

the

PC-bovd

uaentiy

101'

control (Flg.-8)

CD

DIk:onnec:t

....

connectors connedecllo

l'Ie

PC-boiIrd

auembly

for

amtrd.

I%l

Dismount the board from the boerd mounting

lpaoerl

.

Packi

"g

of

...

-

(4)

DI~tlna

the

PCB

aneriJly

for

EYC

(FiII.-6)

CD

DiK:onnect the connectonJ connllded

to

l'Ie

PCB

....

mbly

for

EMC

.

[

~~

5'

I%l

DisIllOUli the

board

frtliTl

the boerd mounting SpllCeri.

- 45 -

(I)

Dlsmol6ltln.

the

ct-ah

valve

auentlly

(Flg

•.

-7

end-8)

(])

Disconnect the connectors connected

to

the

drain valve

aaembly.

®

I...oOIIIIn

the

hose

band end disconnect it.

<3l

Remove

the orifice 1.8 joint.

® Dismount

the

solenoid vai'M set together with

the T chamber joinL

(I)

Dlsmol6ltlnc

the

..

athad

hntar

<D

Tum

the tube counl8rclockMae

to

move

it.

®

Remove

the

~r

winsa,

loosen

the

mounting

nutl

end dismount the healer from the

chember.

(See

Flgs.-9 and -10.)

(7) Dlsmol6ltln.

the

lateral

thennlrior

(TH1)(Fig.-11)

<D

L.ooNn

the thermistor mounting

BCI'8WI

and dismount

the

thermistor end rubber ring.

(I)

Dlsmol6ltln.

the

bottom

thannlrior

(THS)(Fig.-12)

<D

I...oOIIIIn

the thermistor mounting nuls and di.mount

the

thermistor end rubber ring.

(I)

Dlsmol6ltlnc

the

SV

camp.

valve

...

.,-DIy

(FIg.-13)

~~§:

<D

Loosen the mounting nut

to

dismount the

SV

compo

valva assembly.

-

46-

; I

(10) Dismounting

the

pressure sensor (Fig-14)

CD

Cut

off

the binding band and dismount the

connectors from

the

board.

® Loosen

the

mounting nut and dismount

the

pressure sensor.

(11) Dlsmountln.

the

front

panel (Fig.-15)

CD

Make sure that the chamber is not filled with water.

(%l

Tum

the

lever of

the

water

drain

to

·Open-.

@ Remove

the

8 front panel mounting screws.

® Dismount

the

front panel, paying attention to

the

switch cover.

(12) Dlsmountln.

the

lock

shaft

switch

(M Housing assembly) (Figs.-16 and

-17)

CD

Disconnect

the

connectors connected

to

the

switch.

(%)

Remove each 1

saew

which ftxes

the

switch.

;«CWhen

dismounting the switch,

pay

attention

not to

allow a tool

or

finger(s) to hit the

ectuator

of

the

micro-switch. Otherwise, the

(13) Dismounting

the

pressure gauge (Figs.-18 and -19)

CD

Remove

the

cap nut for piping of

the

pressure gauge.

(%)

Remove

the

saews

(3 pes.) which

fIX

the pressure

gauge.

Cap

nut

*

Pay

attention not

to

lose

the

O-ring (P5)

which is

inserted between

the

pressure gauge and

the

pipe. Also, do not tighten the cap

nut

too much

(14) Dismountin.

the

breaker

(Fig.-20)

CD

Remove

the

4 wires.

(%)

Remove the 2 breaker mounting screws.

-

47-

*·0· shows

the

saew

position.

s .......

(15) Dismounting

the

fan

motor

(Fig.-21)

CD

Remove

the

power

supply connectors which are connected.

(2)

Remove the 2 motor mounting screws.

(16)

Dismounting

the

chllJTi)er

cover

plate

(Figs.-22

and

-23)

CD

Remove

the 12 cover chamber lid

mounting

screws.

(2

screws are found

at

the

back

side.)

(17) Dismounting

the

..,e.ke.

(Figs.-24 and -25)

<D

Remove

the 1 speaker cover plate

mounting

screw.

(%)

Remove

the

plastic lugs and dismount

the

speaker.

(18)

Dlsmountlna:

the top

plate

CD

Remove

the 6

mounting

screws

at the back

side.

(Fig.-26)

(%)

Remove the 4 screws

at

the both sides. (Fig.-27)

(19)

Dlsmountlna:

the

operation

body

CD

Remove

the 6

handle

cover

mounting

screws.

(Fig.-28)

(%)

Remove

the

2 mounting screws

at

the

back side. (Fig.-28)

(The

mounting

screw at the right

side

is tightened together

with

the speaker.)

@ Remove

the

3 mounting screws

at

the

top plate side. (Fig.-29)

@

Since

the

wires

are

connected,

tum

them

over

on

the top

plate.

@

Remove

the connectors which

are

connected.

Screw

* If

the

body

is

opened

with

the

wires

being

connected

to

it.

wires of the

speaker.

etc.

may

be

broken.

Pay

attention to

the

-

48-

screw

position.

.....

iIt)

CD

FWnove

the 5 board coni.

cover_

mounting

sa'eWII.

(FIg.-30)

CZl

RemCMil

the

5 display

P~aard

•

...."bly

mounting

8CI8W1I.

(Fill.-31)

(J)

Remove

the

plastic

lup.

(FIII.-31)

(21) R

••

1CMnc

the

braD

~

(J)

RfImcwe

the 2 tnb

Igt*"*'ll-

.-III

cIiImounl

the

bi'ab

upper I'iand bIwJtat.

(Flg . ..32)

!%l

L.Doaen

and nirT10Ye

the

2 brake mounting

Icrewt;. (Flg .

..33)

(n)

Rernr:mn.

the

rW1t

and

left

t'*w;.

IDf"Inp

(J)

RMIoYe

the

heIoagoIlIIlCI'WIIlI'I'IictI

lad:

Ow

spdngL

(See

Aga.-34 .-III

35

.)

I%l

RernCMiI!tIe"

hind

bracIwt

iIPI1nII

mounIIng

right

and

IIrft

~.

(J)

Remove

the

I'eanhaft

look

ring.

!&)

Fully open

IhIlkllUid

pullout th

.....

1'

ltuttt.

(J)

Remove

!tie " top

..

1tIng

.,....

mcu'ltftg

~

(F1g.-38)

(2)

PuI 0I.t

the

bush tom the ....... oedor. (Fig.-38)

(Jl

RfIrnoye

the 2 look

st.lllCllYale

pl.

mounting

8CI8WS.

(FIII.-37)

®

Mlllumly

unlock the lock shaft and dismount

theloc:k

sl'lRl't

actlYa

pi..

.

(FIQ.-37)

($)

FWnove

the "

KI'8WS

at the batI

8idee

d

!hi

hIncII

support plele

...mbt;

.

(Ag

.-3B)

-

49-

~

Ranowt

the

04

....

Ibid

Ib1I

pate

mounting....-.

(Rg

.-38)

C%l

RarrIclw.IM 2 solenoid

mounIng

a.cr-.

.

(Flg . ...tO)

!II

CUt

011'

the binding

bene!.

(Flg.

CO)

!II:

When

dismounting the eoIenoid menuelly,

p.y

.tt.nUon not

to

allow tool

and

ftngar(l) Ie

hit tha aoillnoid switch

actuator.

Otherwillll,

tIMI

ec:tJator may

be

1WFTIOWd

.

(M)

DbmcurtInI

the

....

Md

twttch

and

lei

twitch

(Ie

'-II,..

.....

1')

(Flg.

....

1)

cr>

Ranowt

the

1

....

00

IWIt!;h mounting

1ICI8W.

(%l

RemOlll'e

the

2

aaews

of

each

of

the

IWItch

ftttIng

plate.

C!l

Ramova aad11 lid switch mounting

Icr.w.

tal

Cut

orr

1M

binding band.

!II:

'It'hen diImounting

the

....

00

awik::l'l

a'ld lid

bOik:h.

~

ata.ntIon not to allow

\001

and tngar(1)

to

~

the

aoIenoid

B'IIII'i1UI

Jduator.

othIII

....

,

the

actuar

may

IM_nowel

-

50-