Cocoon CWS 4000 User manual

COCOON

TM

Essential care before, during and after surgery.

Convective Warming Machine

PS

CE

Model

CWS

4000

SERVICE

MANUAL

Distributed

by

CARE

ESSENTIALS

PTY LTD

National

International

Unit

62, 170

Forster

Road

Phone

03

9562

7713

Phone

+61

3

9562

7713

Designed

&

Me Waverley

Vic 3149

Australia

Fax

03

9562

7714

Fax

+61

3

9562

7714

manufactured

Email

queries@careessentials com.au

in Australia.

Web

www.careessentials

comau

Copyright © 2003

Care Essentials Pty Lid

CONTENTS

IN

O

O

2

2.

OPERATION.

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21.

UnitSetup..........

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4

2.2

Getting

Stared

nm

eneret

esserne

5

2.3.

Unit

Operation Procedure

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24

Symbols

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6

3.

SAFETY

PRÉCAUTIONS

iii

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3.2.

Warmnnd

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7

3.3.

Caution.................................................

111

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34.

Electromagnetic

Interference..........................

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7

4.

PREVENTATIVE

MAINTENANCE

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4.2.

Electrical Safety

Inspection

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4.3.

Performance

Inspection

111111

ининининнни

9

4.4.

Temperature Limit Thermostat Test Procedure

…............................................

10

4.5.

Filter

Replacement

iii

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12

5.

TROUBLESHOOTING…

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13

5.1.

Warming Blanket Will Not Inflate irei

13

5.2.

Standby

Indicator

Will Not

Light

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13

53.

EguipmentRepairs..............................................

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13

6.

SCHEMATIC

DIAGRAM DESCRIPTION

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6.1.

Control

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6.2.

Sensor

Board

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6.3...

System

Block

Diagram.................

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15

7.

BOARD COMPONENT LEGENDS .Nt

16

7.1.

Control Board...

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7.2.

Sensor

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8.

SCHEMATIC

DIAGRAMS

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18

8.1.

Control

Board

Schematic

Diagram … … …

18

8.2.

Sensor

Board

Schenmatic

Diagram ....................

19

8.3.

System

Block

Diagram

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20

INC li

21

9.1.

General

Assembly

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9.2.

Control Board...

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9.3.

Sensor

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10.

WARRANTY

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11.

SPECIFICATIONS............................................

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12.

APPROVALS

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25

Care Essentials

CWS4000 Cocoon Warming System Service Manual

1.INTRODUCTION

It is a	pre-requisite for		all	persons		skilled in	servicing medical devices		to understand the
information		contained	in	this	Manual. Read		and	understand this Manual and the		Operator
Manual	and	all precautions			prior	to servicing	the	Cocoon Convective	Warming	System.

When	used	with Care	Essentials patient warming blankets, the Care Essentials			CWS4000
provides a		continuous	method of warming patients and is intended	for	preventing	and		treating
hypothermia. The Cocoon Convective Warming System consists of				a	CWS4000	and	a	warming
blanket.	A	connecting	hose conducts heated air from the CWS4000	to	the warming		blanket.

Figure 1 Convective Warming System

Care

Essentials recommend that a program of

regular

routine

maintenance,

electrical

safety

and

performance inspections be instituted for

the

CWS4000

as

described

in

Section 4

below.

The

CWS4000

is

a

mains-powered, microprocessor-controlled

device that delivers a continuous

flow

of

temperature-controlled

air

through

a

flexible

hose

to

the

warming

blanket.

The

temperature

of

the

air delivered to the blanket

can

be

set

to

one of six settings:

ambient,

34°C,

37°C,

40°C,

43°C,

or 46°C.

When

a

temperature

of

46°C

is

selected, the

setting

automatically

drops

to

43°C

after

10

minutes.

The

CWS4000

will

not

cool

the

air delivered

to the

blanket

below

the

ambient

temperature

of the

room.

Air is

drawn

into

the

rear of

the

CWS4000

and

passes

through

a bacteriological HEPA filter. The

CWS4000

includes

a

number of

under-

and

over-temperature

prevention

systems

and

in

a

temperature fault condition it automatically shuts down and signals an alarm.

This

Manual

presents all

the relevant service

information

for

the

Care

Essentials

CWS4000

Cocoon Warming System. This information is

provided

as

a

service

to

engineering and technical

personnel.

This

information

is

intended

for the

fair purposes

of

operation

and

maintenance

of

the

CWS4000.

It is provided

as Commercial-In-Confidence

material

to

the

Care

Essentials

Distributor

or

CWS4000

owner

and

shall

not

be

made

available

to any

other

organization

or

person without

the specific

written

permission

of Care

Essentials.

Revision |

13 June 2006

Page 2

Care

Essentials

CWS4000

Cocoon

Warming

System Service

Manual

While

every

attempt

has

been

made

to

ensure

this

Manual

is accurate

and

complete,

no

responsibility

is taken

for

any

errors

or

omissions.

Care Essentials has

a policy of

continuous

product improvement

and

product specifications

and component types

are

subject

to

change

without

notice.

If you, as a user of this manual, have any relevant comments or questions about the CWS4000

or this Manual, your communication with Care Essentials would be welcomed. Our contact details are located on the first page of this Manual.

Revision |

13 June 2006

Page 3

Care Essentials

CWS4000 Cocoon Warming System Service Manual

2.OPERATION

2.1.Unit Setup

The

CWS4000 may be

placed

on

the

floor,

mounted

on

the

foot of the bed

using the

foldout

brackets,

or

clamped

to

an

IV

pole

using

the

IV

pole

clamp.

When

using

an

IV

pole,

do not

mount the

CWS4000

higher

than

1 metre

or

it could

tip

over.

Do

not place

the

CWS4000

ona

bed

surface.

Note

that

if

the

CWS4000

is

placed

on

the

floor, increased

levels

of dust and

lint

could

reduce

filter

life.

IV Pole Clamp

maximum

Figure 4 Pole mounting height limit

Revision I

13 June 2006

Page 4

Care	Essentials		CWS4000 Cocoon Warming System Service	Manual
			F
		Output Temperature
		Seiection	Indicators
			|
			Symbols
			See	section	2.4
			Fault	Alarm	Indicator
Standby	Indicator		Filter	Status	Indicator
		A+
Standby Button
Ambient	Temperature		Output temperature
Output		Button	selection	buttons
Ambient		Temperature
	Output Indicator

Figure 5 Operator control panel

2.2.Getting Started

Plug

the

mains

cable

into

a conventional,

properly

earthed 240

Volt

10

Amp

mains

power

socket-outlet and switch it on. The green Standby

indicator

(B)

will

illuminate and

the

CWS4000

will

beep

when

power

is

connected.

Ensure

that

air

is not

prevented

from

entering the

inlet slots

at

the

sides

by blankets or

other

objects.

Remove

the warming

blanket from

its

packaging.

Unfold

the

warming

blanket

and

place

it over

the

patient.

Connect

the

air delivery

hose

to the warming

blanket

by

pushing

the plastic

fitting

into

the

air

inlet

port.

2.3.Unit Operation Procedure

Select the desired temperature on the control panel pressing either one of

the

Output

temperature selection buttons (E) or Ambient Temperature Output Button (C). The

appropriate green or yellow light

(D

or

F)

will

indicate

the

selected

temperature

setting.

Another

temperature

may

be

selected

at

any time.

The

air

temperature

surrounding

the

patient

will

vary

at

each

setting,

depending

upon

ambient

air

temperature

and

the

quality

of

the

insulating

blanket

or

sheet

that

is

used

over

the

warming

blanket. When

using

the

34°C,

37°C,

40°C,

43°C,

or 46°C temperature settings, place your

hand

under

the

warming

blanket

to

confirm

that

the

CWS4000

is

supplying

warm

air.

Place a

sheet or blanket over the

inflated

warming

bianket

to

maximize

the

efficiency

and

minimize

the

heat

loss

from

the

system.

The internal timer will automatically decrease the temperature setting from

46°C to 43°C

after

10

minutes. This timer can be reset

by

momentarily selecting

another

setting

and

then

re-selecting

46°C.

Switch the unit off by pressing the Standby

Button

(A).

The

green

Standby

indicator

(B)

will

illuminate

when the

unit

is

off.

The

unit

will

automatically

switch

off

in

an

alarm condition and the green Standby indicator

(B)

will

illuminate

together

with

the red

Fault

Alarm

indicator

(H).

In the

event

the

Fault

Alarm

Revision |

13 June 2006

Page 5

Care Essentials

CWS4000 Cocoon Warming System Service Manual

indicator

(H)

illuminates,

disconnect

the

CWS4000

from

the patient

and from the

mains

power

supply

and

have

it serviced by trained

personnel.

The Filter Status indicator (G) provides

the user

with

information

on

remaining

filter life.

This

indicator is

interpreted

as

follows:

Indication

Description

Steady

green

indicator

Filter

status

normal

Steady

orange

indicator

|

Filter

life

has

reached 950

hours

Flashing

orange

indicator |

Filter life has reached 990 hours

Steady

red

indicator

Filter

life

has

exceeded

1000

hours and

requires replacing

2.4.Symbols

The following symbols are used on the CWS4000:

Attention: consult accompanying documents

Dangerous voltage

A		Type BF	applied	part
16°C -	29°C	Ambient	operating	temperature range, indoor use only

Revision |

13 June 2006

Page 6

Care Essentials

CWS4000 Cocoon Warming System Service Manual

3.SAFETY PRECAUTIONS

Review the following safety precautions prior to servicing the CWS4000.

3.1.Danger

e Explosive hazard. Do not use in the presence of flammable anaesthetic agents. e Risk of electric shock. Disconnect mains power before servicing the CWS4000.

3.2.Warning

e

Ensure that

no

direct

or

indirect

contact

is made

between the patient and

the communications

connector

located on

the rear of

the

CWS4000.

e

The

CWS4000

must

only

be

opened

or serviced by qualified personnel such as certified

biomedical

electronics

technicians or certified clinical engineers familiar with repair practices

for

servicing

medical

devices,

and

in

accordance with the Service

Manual. Damage to the

CWS4000

or

malfunction

could otherwise

result.

eEnsure the CWS4000 is subjected to the specified routine electrical safety and performance inspections.

e Inthe event of excess fluid contact with the CWS4000 it is recommended that the unit be disconnected from the mains power supply and checked by qualified personnel.

e Use only in accordance with Operator Manual instructions.

3.3.Caution

e	Operate the	CWS4000	only in the specified supply			voltage	range	and environmental
	conditions and as detailed in Section			11	below.
ο	When using	an IV pole,	do not mount	the	CWS4000	higher	than	1 metre or it could tip over.

eThe 46°C setting is not recommended for patients who are non-responsive or with impaired circulation.

e It is	not recommended that the unit be operated after the filter has exceeded the specified
life	period.

3.4.Electromagnetic Interference

The

CWS4000

has

been

designed

to

comply

with

IEC

601-1-2:2004

(Medical

electrical

equipment — Part 1: General

requirements for safety. 2. Collateral standard: electromagnetic

compatibility

—

Requirements

and

tests) but

this

does

not guarantee

that other

equipment

in the

vicinity will not be affected

by

the

electromagnetic

emissions

from

the

CWS4000. Similarly,

other equipment in

the

vicinity

may

affect

the

operation

of the

CWS4000.

It is

recommended

that

all

equipment

used

near

the CWS4000

comply

with the

relevant

electromagnetic compatibility requirements for that equipment and to

check before use that no

interference

is

evident

or

disruptive.

Increasing

the

distance

between

offending

devices,

and

keeping interconnecting

leads

as

short

as

possible

will

help

reduce

the

effect.

Revision |

13 June 2006

Page 7