Service Manual
Vela
Ventilator Systems
L1534 Revision B December 2004
Revision History
Date Revision Pages Changes
Marc h 2002 X1 All Initi al Dr aft
April 20 02 X2 All Added Eng i neerin g Drawings ,
Theory of O peration, C ali br ati on
an d PM proc e d ures
Ju ne 200 2 X3 All Added Extende d Fun ction s an d
UVT Test Scr e ens. A dd ed E rror
Codes.
August 20 02 A All Fina l rev ie w & en gi ne eri n g
rel ease. Modif i ed OVP,
Calib r ati o n and scree ns.
Decem ber 20 0 4 B 39 Repl ac ed Fi gure 3.1 3 U mbr el l a
Check Valv e with Figur e 3. 13
Umbr el la Chec k Valve (P/N
21 95 0)
L1534 Revision B December 2004
Service Manual 3
Warranty
THE Ve la v enti lator systems are warranted to be fre e from d efects in m aterial an d w orkm a nship an d to
meet th e pu bli s he d spec ific ati ons f or two ( 2) year s or 8,0 00 ho urs, whic h ev er occ urs fir st. The tur bi ne
on ly is w arr anted to be fr ee fr om d efects in materia l or w or kmanship f or fi ve (5) y ea r s or 40,00 0 hours
whichever o ccurs first.
The liability of VIASYS Healthcare, Cr itical Care Division, (r eferr ed to as the Company) under this
warr anty is li mi ted to r ep lac in g, repai r in g or issui n g cre dit, a t the di scret io n of the Com p an y, for parts
that bec ome d efecti ve or fai l to me et pub lis h ed s pe cific ati o ns d uri ng the w arranty p eri o d; the C om pa ny
wil l n ot be li ab l e u nd er thi s w a rranty un less ( A) the C om pa n y is pr ompt ly n otifi ed in writi n g by Buy er
up on discov ery of def ects or f ail ur e to me et pu bl ishe d spec ificat io ns; (B) t he defectiv e u n it or p art is
retur ne d to th e Com p any, tra n sportati on c ha r ges prep ai d by Buyer; (C) th e def ectiv e u nit or part is
rece iv ed by th e Com pa ny for ad justm e nt no l ater th an f our we eks fo ll owin g the last day o f the w arra nty
perio d; and (D) the Com pa ny’ s exa mi natio n of suc h u nit or part sha ll disc l ose, to its sati s f actio n, that
such d efects or fail ures ha ve n ot be e n caus e d by misu se, n eg lect, impr op er in stallat io n, un authoriz ed
repair, alteration or accident.
Any auth or izat i on of the Com pa ny for rep air or alt er atio n b y the Bu yer mus t be i n writ in g to prevent
voidi ng the warr anty. In no ev ent s ha ll th e Compa ny be li a b le to the Buye r for los s of pr ofi t s, loss of
use, con se qu e ntia l d am ag e o r dam a ges of any kind ba se d up on a claim f o r bre ac h of w ar r anty, ot he r
than the purch ase price of an y def ectiv e pr o duct cov ere d here un d er.
The Com pa ny warr anties as h ere in an d abo v e set forth sh al l not be e nl arg e d, dim in is he d o r affecte d
by, a nd no ob li gatio n or l ia bi lit y sha ll arise or grow o ut of the ren derin g of technic al a dv ice or serv ic e by
the C om pa ny o r its agents in c on ne ctio n w ith the B uye r's or d er of the prod u cts furni sh ed h ere un d er.
Limitation of Liabilities
This warr anty do es n ot co ver normal mai nte na nc e suc h a s cle an in g, a dj us t ment or lu bri c ation an d
up datin g of eq ui pment parts. This warr anty sha ll be v oi d a n d shal l n ot ap pl y if the eq ui pm ent is us ed
with a cce ssor ie s or p ar ts n ot ma nu factu r ed b y the Company or au thor ized fo r use in writing b y the
Com p any or if the eq ui pment i s not m ai ntai n e d in accord a nc e wit h th e pres cribed s ch ed ul e of
mainte na nc e.
The warr anty st ated ab ov e sh all exte n d for a peri o d of FIVE (5) ye ars from date of sh ip ment or 40,0 00
ho urs of use, w hic he ver occur s first, with th e followin g ex ce ptions:
1. Com p on ents fo r monitor in g of physical v ari ab les s uc h as temper at ure, pre ssur e, or flo w a r e
warr anted for n in ety (9 0) days from date of receipt.
2. Elast om eric c o mpon ents an d other p arts or c ompo ne nts su bj ect to d eter io r ation, ov er w hi ch the
Com p any ha s no control, ar e warr anted for s ixty (60) days fr om d ate of recei pt.
3. Internal batteri es ar e warrant ed for ni nety (9 0) days from th e date of rece i pt.
The for e go in g i s in l ie u of a ny warr anty, expr essed or impli e d, inc lu di n g, wi thout lim itati on, any warr anty
of merc ha nt ab i lity, exc e pt as to title, an d ca n be ame n de d o nly in writi ng b y a d uly authori zed
repr es entative of the Comp an y.
L1534 Revision B December 2004
4 Vela Ventilator s
Contents
Revision History..............................................................................................................2
Warranty....................................................................................................................... ..................3
Limitation of Liabilities...................................................................................................... ............................ 3
Notices ........................................................................................................................ ...... 9
Copyright Notice ............................................................................................................... ............. 9
Trademark N o t i c e s . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ............ 9
EMC Notice ..................................................................................................................... ................ 9
MRI Notice..................................................................................................................... ............... 10
Intended Us e Notice ............................................................................................................ ........ 10
Regulatory Notice .............................................................................................................. .......... 10
IEC Classifi cation ........................................................................................................................ 10
Declaration of Conformity Notice ............................................................................................... 10
Safety Information......................................................................................................... 11
Terms ............................................................................................................................................11
Warnings ....................................................................................................................... ............... 11
Cautions ....................................................................................................................... ................ 12
Equipment Symbols ...................................................................................................... 13
Chapter 1 Introduction.................................................................................................15
General Inst ructions ........................................................................................................... .........15
Recommended Tools & Equipm ent............................................................................................15
Recommended Maintena nce Schedu les.................................................................................... 16
Schedules .................................................................................................................................................. 16
Chapter 2 Theory of Operation..................................................................................... 17
General Device Description ........................................................................................................ 17
Pneumatic System Overview ...................................................................................................... 17
Flow Deliver y System ........................................................................................................... ..................... 17
Exhalation System .............................................................................................................. ....................... 17
Safety System ........................................................................................................................................... 18
Inspirat ory Hol d V a l v e . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ....................... 18
Oxygen Blending S ystem............................................................................................................ 18
Electronic Ov e r v i e w . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ..........18
L1534 Revision B December 2004
Service Manual 5
User int erface module (UIM) .................................................................................................... ................. 18
Power System................................................................................................................... ........................ 20
Main Controll er System ............................................................................................................................. 20
The Watchdog Timer and Hardware F au l t . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ....... 21
Exhalation System .............................................................................................................. ....................... 21
Flow Deliver y System ........................................................................................................... ..................... 21
Oxygen Blending Syst em.......................................................................................................................... 22
Chapter 3 Disassemb ly & Assembly.......................................................................... 23
General Instructions and Warn ings ........................................................................................... 23
Required Tools................................................................................................................. ........... 24
Disassembly and Reassembly Procedures............................................................................... 24
Power Cable .................................................................................................................... .......................... 24
Top Cover Part number 15893.................................................................................................... .............. 25
Battery Tray Part Number 10633 ................................................................................................. .............. 26
PCMCIA Cards................................................................................................................... .......... 28
Left Pa nel..................................................................................................................... ................ 28
Right Panel Containing the Power PCB P/N 15894 .................................................................. 29
Front Panel Pa rt numbe r 15869 .................................................................................................. 32
Parts List – Front Panel Part Numb er 15869..................................................................................... ........ 33
Main PCB (on Front Panel) P/N 52130....................................................................................... 34
Flow Sensor PCB assembly P/ N 15991..................................................................................... 37
Exhalation Valve Assembly P/N 15871...................................................................................... 38
Inspiratory Hold Solenoid and Check Valve Assem bly P/N 10346.......................................... 39
Manifold Base assembl y ............................................................................................................. 40
Oxygen Sensor part numbe r 15972 ........................................................................................... 43
Rear Panel part number 1 5892 ................................................................................................... 44
Turbine and Muffl er Assembly ................................................................................................... 47
Over Pressure Relie f Valve assem bly....................................................................................... 48
Turbine Motor Driver PCB part number 71597 ..........................................................................49
Muffler/Filter Assembli es part num ber 10364 ........................................................................... 50
Removal........................................................................................................................ ............................ 50
Blender Assembly Part N umber 15895 ...................................................................................... 51
Fan Assembly part number 15500............................................................................................. 53
Chapter 4 Operational Verification and Calibration............................................... 55
L1534 Revision B December 2004
6 Vela Ventilator s
Operational Verifi cation Testing ............................................................................................... .. 55
Lamp Test .................................................................................................................................................. 56
Switch Test.................................................................................................................... ............................ 56
Alarm Test ..................................................................................................................... ............................ 57
Filter Test .................................................................................................................... ...............................57
Leak Test ................................................................................................................................................... 58
Exit............................................................................................................................................................. 58
Extended Fu n c t i o n s . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ........ 59
Events......................................................................................................................... ...............................60
Transducer Data................................................................................................................ ........................ 61
Transducer T e sts............................................................................................................... ........................ 62
Version Information............................................................................................................ ....................... 64
Date & Time .................................................................................................................... ........................... 65
FiO2 Calibration ............................................................................................................... .......................... 66
Vent ilator Setup ............................................................................................................... .......................... 66
Low Min Volu me Off.................................................................................................................................. 67
Locks Disabled ................................................................................................................. ......................... 68
FiO2 Monitor Disabled .......................................................................................................... ..................... 68
Altitude Ad just ment............................................................................................................ ........................ 69
Language Selection...................................................................................................................................70
Verification test s .......................................................................................................................... 71
Vela Ventilator Performance Ch ecklist ...................................................................................... 73
Calibra tion .................................................................................................................... ................ 75
Test Set-up.................................................................................................................... ............................ 75
Power Up Verifica tion/Service Veri fication Tests ....................................................................................... 75
Exhalation Pressu re Transducer ................................................................................................. .............. 77
Turbine Pressure Transducer .................................................................................................... ................ 78
Exhalation Flow Tran sducer Calibration ......................................................................................... ........... 80
Oxygen Pressure Trans ducer Calibration......................................................................................... .........81
Regulat or ca libration:................................................................................................................................. 83
Oxygen Sensor Calibration ...................................................................................................... ... 86
Chapter 5 Maintenance & T roubleshooting ............................................................... 89
Routine Maintenance Procedures.............................................................................................. 89
Replacing the softwar e PCMCIA cards.....................................................................................................89
Replacing the exte rnal A/C fuses. .............................................................................................. ............... 90
L1534 Revision B December 2004
Service Manual 7
The Annual 5000 hour P. M. Procedure ...................................................................................... 91
Replacing the ambi ent air filter............................................................................................... ................... 91
Replacing the f an fi lter ....................................................................................................... ........................ 91
Replacing the filter, ret aining ring & ch eck valve on the low pres O2 fitting.............................................. 92
Replacing the filter, ret aini ng ring and check valve on the hi pressu re fitting ............................................92
Replacing t he muffler and muffler filter assemblies............................................................................ ....... 93
Replacing the left pa nel w/powe r PCB. .......................................................................................... ........... 95
Troubleshoo ting ................................................................................................................ .......... 96
If The Ventilator Does not Turn ON ............................................................................................. .............. 96
Reviewing the Trans ducer Wavef orms..................................................................................... 97
Appendix A Contact & Ordering Informatio n ............................................................ 99
How to Call for S upport ........................................................................................................ ...... 99
Ordering Part s ................................................................................................................. .......... 100
Appendix B Diagrams & Schem atics ........................................................................ 101
Appendix C Specifications ........................................................................................105
Oxygen Supply .......................................................................................................................... 105
High Pressure Connect or ........................................................................................................ ................ 105
Low Pressure Connector ......................................................................................................................... 105
Electrical Supply .............................................................................................................. .........105
AC Power Supply ................................................................................................................ .................... 105
DC Power Supply ................................................................................................................ .................... 105
Data Input / Output ............................................................................................................ ........ 106
Analog Inputs.......................................................................................................................................... 106
Analog Ou t puts ................................................................................................................. ....................... 106
Digital Comm unication.......................................................................................................... ................... 107
Print er ........................................................................................................................ .............................. 107
Remote Nurse Call .............................................................................................................. .................... 107
Video O utput ................................................................................................................... ........................ 107
Atmospheric & Environm ental Specifi cations ........................................................................ 107
Temperature and Humidity....................................................................................................... ............... 107
Barometric Pressure ............................................................................................................ .................... 108
Physical Dimensions ............................................................................................................ .... 108
Overall Size ................................................................................................................... .......................... 108
Weight......................................................................................................................... ............................ 108
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8 Vela Ventilator s
Appendix D Service Event Cod es .............................................................................. 109
Appendix E Error Messag es ............................................... Error! Bookmark not defined.
Glossary .......................................................................................................................112
Index .......................................................................................................................... ... 114
L1534 Revision B December 2004
9 Vela Ventilator s
Notices
Copyright Notice
Copyright © 2001 VIA SYS Healthcare, Cr it ic al Care Div ision, Calif ornia.
This work is pr otect ed un der Title 17 of th e U.S. Co de an d is the s ol e pr o perty of the Company. N o p ar t
of this docume nt may be c op i ed or other wis e reprod uce d, or stored in an y electro nic inf ormat io n
retrieval system, except as s pecifically per mitted under U.S. Copyright law, without the prior written
conse nt of the Comp any. For more inf orm ati on, c ontact:
World Headquarter s European Office
11 00 B ir d Ce nt er Dri ve Rem br an dtl aa n 1b
Palm Sprin gs, CA 9 22 6 2-8 09 9 37 23 BG Bilt ho ven
U.S.A. P.O. Box 2 99, 37 20 AG Biltho ven
Phone: (7 60 ) 778 -7200 Th e Ne ther land s
(8 00 ) 328-4139 Phone: (3 1) 3 0 2 289 71 1
Fa x: (7 60 ) 778-7274 Fa x: (3 1) 3 0 2 286 24 4
www.Vi asys Crit ical Care.com
Trademar k Notices
Vela
is a registered trademark of VIASYS Healt hcare, Critical Care Division in the U.S. and some
other co untrie s . All oth er bran d n ames and p r od uct n am es ment io ne d i n this m an u al are trademarks,
registered tr ad emar ks, or trad e n ames of the ir res pect ive ho ld ers.
EMC Notice
This eq ui pmen t gen er ates, u s es, a nd c an ra di ate radi o fre q ue ncy en ergy. If not install e d an d us e d in
accord an ce with the instr ucti o ns in this m a nu al, e lectromag netic interfere n ce ma y res ult. The
eq ui pment h as been te sted a nd fo u nd to c o mply with the li mits set forth in EN6 06 0 1-1-2 for Me dical
Prod ucts. The s e limits p r ovide reas onable p r ot ection agains t e lectro m agnetic inte rfe r enc e when
op erated in th e inte nd e d use enviro nm ents descri be d i n this man u al.
The ventilat or has be e n tested to conform to the fol lo wi n g specific ati ons:
MIL- STD-46 1D:1 99 3, MIL-STD-46 2D:199 3, EN55011 :1 99 1 , IEC 10 00-4- 2:19 94, IEC 100 0-4-3:1 9 94,
IEC 100 0-4-4:1 99 4, IEC 1 0 00-4-5:19 94, QUA SI-STATIC:199 3
This ventilat or is als o d esi g ne d a nd m an ufa c t ured to compl y with the s afet y req uir ements of IEC 601-1,
IEC 601-2-12, CAN/ CSA- C22 . 2 No. 60 1.1-M90, a n d U L 2 6 01-1.
L1534 Revision B December 2004
10 Vela Ventilator s
MRI Notice
This eq ui pmen t conta in s el ectr oma g netic compon ents who se operati on c an be affecte d by inte nse
el ectrom a gn eti c fiel ds.
Do not o p erat e the ve nti lat or in a M RI en vir o nme nt or i n th e vici nity of hi gh -freq ue ncy s ur gic al
di at he rmy equ ip ment, de fibrillato rs , o r short-wave th erapy e qu ipme nt. Ele c tromag netic int erferen ce
could disru pt the operati on of the v entil ator.
Intended Use Notice
Th e Ve la Ven t ila to rs ar e de sign ed to p r ov ide ve nt ila t or support fo r the critica l care ma nage ment o f
infa nt, p ed iatric or adult patie n t s with c om pro mise d l un g fu n ctio n. They ar e inte nd e d to pr ovide
cont in uo us res pir atory s up p or t in a n in stituti o na l h ea lth c are env iro nm ent. They should only be
operated by properly trained clinical pe rsonnel, under the direction of a physi cian.
Regulator y Notice
Federa l law restricts the sal e of this devic e except by or on order of a phys ici an.
IEC Classification
Type of Equipment: Medica l Eq uipment, Class 1 typ e B
Adult/Pe di atric/ I nfant Lu ng Ventilator
Declaration of Conformity Notice
Th is me dical eq uipm en t co mplie s with the Medical Device Directive,
93/42/E EC, an d the f oll o wi ng Tech nical St a n dards, to w hi ch
Conformity is d ecl ared:
EN60601 -1
EN60601 -1 -2
ISO 90 01, E N 4600 1
EU Notified Body:
BSI (Reg. No. 0086)
Traden ame s:
Vela
If you hav e a quest ion regarding th e Declar at ion of Conf ormity for this pr oduct, please c ontact VIASYS
Healt hcare, Cri t ical Care D ivisio n at th e num ber given in A p pe nd ix A.
L1534 Revision B December 2004
Service Manual Fron t Ma tter 11
Safety Information
Plea se re view the following safet y informat ion prior to operating the ventilator. Attempt ing to
op erate the ve ntilator witho ut fully un d ersta n di ng its features and functions may result i n u nsafe
op er at ing condition s.
Warn in gs a n d Ca uti ons which are ge neral to the use of the vent il ator un de r all c ircumstan ces ar e
inclu de d i n this secti on. So m e War ni ngs an d Cautio ns ar e also i nserted w ithi n th e ma nu al w h ere they
ar e mo st meaningfu l.
Notes are also locate d thr ou g ho ut the m a nu al to prov id e add itio n al i nform ation relat ed to spec ific
features.
If you h av e a q uest io n re ga rd i ng th e i nstall ati on, s et up, op e r ation, or m ai nt en an ce of the vent il ator,
cont act VAS Y S He alt hcare C ustom er C ar e as sho wn i n A p pe nd ix A, C ontact & Ord eri ng Inform ation.
Terms
WARNI NGS id entify c o nd iti ons or pr actic e s that coul d res ult i n ser io us adverse r eact io ns or
potential s afety haz ards.
CAUTIONS id entify c o nd iti ons or pr actic e s that coul d res ult i n d amag e to the v e ntilator or oth er
eq ui pment.
NOTES id entify s u pp le ment al infor ma t ion t o h el p you better un de rst an d h ow the v e ntilator
work s.
Warnings
Warning s and Cau t io ns appea r thro ug hout this ma nual whe r e the y ar e re le vant. Th e Warnin gs an d
Cauti ons l isted her e app ly ge neral ly a ny tim e you operate t he v entil ator.
• The Vel a Ve nti l ator is int en de d for us e by a tr ai ne d practiti o ner un de r the d irecti o n of a
qu al ified phys i cia n.
• When th e ve nti lator is co n nect ed to a pati ent, a traine d hea lt h car e pr ofession al sho ul d b e in
atten d ance at all ti mes to re a ct to an al arm or other i n dicat io ns of a probl em.
• Alar m loudne ss must be set ab ov e ambien t so un d in or de r to be hear d.
• Always have a n alt ern ate me ans of ve ntilati on ava il ab le w he ne ver th e ve ntilator i s in us e.
• The op erat or s ho ul d n ot tou c h the el ectric al conn ectors of the v entil ator or acce ssor ie s, a nd
th e patie nt simu ltane ou sly.
• Due to poss ib l e expl osio n ha zard, the ventil ator s ho ul d n ot be u se d i n the pres en ce of
flamm ab le an e stheti cs.
• An a ud ib le al ar m indicates an an omal ous c o n diti on an d sho u ld nev er g o u n he ed e d.
• Anti-sta tic or e l ectrica l ly conductive hose s or tu bi ng sho u ld not be used with in th e pat ient
circuit.
• If a mech a nic al or el ectric al pr ob lem is rec o g niz ed whil e run ni ng th e Op er a t ional V erif icati on
Tests, or whi le op eratin g the ventilat or, the v entilat or must be rem ove d fro m use an d r efe rred
to qu al ifi ed personn el for servi cin g. Usin g an in op erative v e n t ilator may r es ult i n p atie nt i nj ury.
L1534 Revision B December 2004
12 Vela Ventilator s
• When a low ga s sup pl y al arm occurs, the oxyge n conc entrat io n d eli vered to the pati ent w il l
differ from that set on the O2 control setting.
• A sour ce ga s fail ur e wi ll cha n ge th e FIO2 an d may r es ult i n pati e nt in jury.
• The function in g of thi s e qu ip ment may be a dverse ly affected by th e operation of other
eq ui pm ent nearb y, su ch as h i gh frequen cy su rgical (dia th er my) eq ui pm en t, def ib rilla t or s,
short-wave th e r apy eq ui pme n t, “w alkie-t alk ie s,” or c el lu la r p ho ne s.
• Water in th e air sup ply c a n ca use malf un ction of thi s e qu ip ment.
• Do not block o r re strict the Oxygen bleed port lo ca te d on the instru ment ba ck pan el.
Equipmen t malfu nction ma y result.
• Electric sho ck haz ar d - Do no t remove any of th e ven t ila t or co ve rs o r panels. Re fe r al l
servicing to an authorized VIASYS Healthc ar e serv ic e tec hnician.
• A protectiv e gr ou nd c o nn ectio n by way of the gro un di ng c o n duct or i n the p ow er cor d is
essential f or sa fe op er ation. U po n l oss of prot ectiv e gr ou nd, all c on d uctive parts inc lu di ng
knobs an d co nt rols that may app ear t o b e in s ul ate d, ca n ren der an el ectric shock. To avoi d
el ectric al sho c k, plu g th e pow er cor d i nto a pr op erly wired rece ptacl e, us e on ly th e pow er cord
suppl ie d w ith the v entil ator, and m ak e sur e t he po wer c or d is in go o d cond ition.
Cautions
The following cautions apply any ti me yo u work with the ventilator.
• When re pl acin g fus es, ensure that ne w fus e s are of the s a me type a nd v al ue as th ose b ei ng
replaced. Incorrect fuses ca n caus e dam ag e to th e ve ntilat or.
• A batte ry th at is fully drain e d (i.e. vo id of an y charg e) ma y cause dam ag e t o the ve ntilator and
sh ou ld be rep l aced .
• All a ccessor y e qu ipme nt that i s con n ected to the v entilat or must co mply w ith
CSA/IEC601/UL2601.
• To avoi d dam a ge to the eq ui p ment, cle an th e air filter r eg ul arly.
The following cautions apply when cleani ng the ventilator or when sterilizing ventilator
ac ce s sorie s.
• Do not ster il ize the ve nti lat or. The inter n al co mpon ents are not c ompati bl e with st eri liz ati o n
tech ni qu es.
• Do not gas st er iliz e or steam autoc lav e tubing adapters or c o nnector s in pl ace. The t ubing wil l,
over time, tak e the sh a pe of the ad apter, causing po or con nect io n a nd po ssib le le aks.
• DO NOT submerge th e ve ntilator or p our c le an in g li q ui ds over or into the vent il ator.
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Service Manual Fron t Ma tter 13
Equipment Symbols
The foll owin g symbols m ay be refer ence d o n the ventilat or or in ac com p anyin g docu mentat ion
Symbol Source/Compl iance Meaning
Sy mbol #0 3-02 IEC 60878 Indic at es ATTENT ION, c onsult ACC O MPANYING DOCUMENTS
Sy mbol #5 016 IE C 60417 This symbol indicates a FUSE.
Sy mbol #5 034 IE C 60417
Sy mbol #0 1-36 IEC 60878
This symbol i ndicates INPUT.
Sy mbol #5 035 IE C 60417
Sy mbol #0 1-37 IEC 60878
This symbol i ndicates O U TPUT
Sy mbol #5 019 IE C 60417
Sy mbol #0 1-20 IEC 60878
This symbol indicates protective EARTH (g round).
Sy mbol #5 021 IE C 60417
Sy mbol # 0 1-2 4 IE C 60878
This symbol indicates the EQ UIPOTENTIAL connection used to
connect various parts of the equipment or of a system to the same
potential, not ne cessarily being t he earth (ground) potential (e.g., for
local bonding).
Sy mbol # 5 33 3 IE C 60417
Sy mbol #0 2-03 IE C 60878
This symbol indicates TYPE BH equipment, which indicates equipment
that provides a particular degree of protection against electric shock,
particularly with regards to allowable leakage cur r ent and reliabilit y of
the protective earth connection.
Sy mbol #5 032 IE C 60417
Sy mbol #0 1-14 IE C 30878
This symbol indicates the equipment is suitable for alternating current.
Sy mbol# 5 049 IE C 60417
This Symbol ind i cates the ON condition for a part of the equipment.
When pressed the ventilator will operate from the MAINS voltage (if
connected) or internal or external batteries if the b attery charge is
within operating specifications.
Sy mbol #5 007 IE C 60417
Sy mbol #0 1-01 IE C 60878
Indic ates ON (Power)
Sy mbol #5 008 IE C 60417
Sy mbol #0 1-02 IE C 60878
Indicates OFF (Power)
ACCEPT
Sy mbol #0 651 IS O 7000
Horizontal return with line feed. I ndicates ACCEPT entered values for
a specific fie ld.
CANCE L
Graphic al Symbol in
general us e i nter n ationally
for “ D O NOT”
This symbol indicates CANCEL. Do not accept entered values. The
ventilator contin ues to operate at previous settin gs.
Sy mbol #5 467 IE C 60417
Pressing the but ton with this symbol will FREEZE the current display.
Sy mbol #5 569 IE C 60417 This symbol indicates a CONTROL LOCK.
L1534 Revision B December 2004
14 Vela Ventilator s
Symbol Source/Compl iance Meaning
VIASYS Healthcar e symbol This symbol represents a NEBULIZER.
Sy mbol #5 319 IE C 60417
This symbol indicates ALARM SI LENCE
Sy mbol #5 307 IE C 60417
This symbol i ndicates ALARM RESET
VIASYS Healthcar e symbol Increase OXYGEN
VIASYS Healthcar e symbol Indicates VARIA BLE ORIFICE FLOW SENSOR
Sy mbol #5 031 IE C 60417
This symbol indicates DIRECT C URREN T (DC )
Sy mbol #5 546 IE C 60417 This symbol indicates the INTERNAL BATTERY STATUS display
VIASYS Healthcar e symbol This symbol indicates INSPIRATORY HOLD
VIASYS Healthcar e symbol
This symbol i ndicates EXPIRATORY HOLD
VIASYS Healthcar e symbol This symbol indicates MANUAL BREATH
L1534 Revision B December 2004
Chapter 1 Introduction
General Instructions
When d isasse mbl in g or asse mblin g th e Ve l a, refer t o the p ne um atic sc he matic, tubi ng di agram, an d the
wirin g di a gram show n in Ap pe nd ix B and the ap propr iat e sc hem atics and a ssem bly drawi ngs f or e ach
assembly. The illustratio ns s h own i n this m a nu al are for ref ere nc e only, c u rrent revisio ns of thes e
di agrams an d schemat ics ar e ava il ab le to qu alifie d pers on n el from VIASYS He alt hcare, Critic al Care
Division, Technical S upport.
Always ta ke st an dard ES D precauti on s whe n w orki ng on V el a ventilator systems.
Ensure the v en t ilator is d isc on nect ed fr om the AC po wer s u pp ly b efor e p er f ormi ng an d repa irs or
mainte na nc e. Whe n you rem ove an y of the ventil ator covers or p an els, i m mediat ely disc on ne ct the
inter n al battery “q ui ck re le as e ” c on ne ctor (s e e figure 3.1) be fore w ork in g on the ve ntilator.
Recommended Tools & Equipment
Note
Before using any test equipment [electronic or pneumat ic] for calibration procedures, the accuracy of the
instruments must be verified by a testing laboratory. T he laboratory master test instruments must be traceable to
the NIST (National Institute of Standards Technology) or equivalent.
When variances exist between th e indicated and actual values, the calibration cur ves [provided for each
instrument by the testing laborat ory] must be used to es tablish th e actual correct values. This certification
procedure should be performed at least once every six months. More frequent c ertification may be required
based on usage.
Lo ng & sh ort P hil ip s screw drivers
Flat bla de d scr ewdriver
¼” Nut Dirver
5/ 16” Nu t Driver
7/8” N ut Dri ver
11/32 ” Nut Dr iv el
Digital Volt Meter
Tack p ul ler or Ne ed le no se d pli ers
Diagona l cu tte rs
1 ” a nd ¾ ” o pe n ende d wr en ch es
Pressur e Ma no meter (cm H2 O and ps ig)
Adult Test Lung P/N 33754
Adult Patien t Circuit P/N 10 684
Varia bl e Orifice Flo w Se ns or assembly P/N 15 97 2
Valve Bo dy P/N 20 00 5
Ta pe red nipp le P/N 0 0680
Hex nut P/N 0082 2
Regu lat or P/N 67 54
1/8” ID Tu bi n g tee P/N 00 3 58 D (10pk)
1/8” ID s ili co ne tubi ng P/ N 04 02 9 X (5 0ft)
L1534 Revision B December 2004
16 Vela Ventilator s
Recommended Mainte nance Schedules
Schedules
Every 500 hours , the f an an d amb ie nt air filt ers sho ul d b e c le an ed an d rep lac ed if ne cess ary.
Every 5000 hours , VIASY S recomme n ds that the fo ll owin g Prev entiv e Ma inte n ance proc ed ure be
perform ed (s ee cha pter 4 for instructio ns). This proc e dure i ncl ud es:
• Repl ac eme nt o f the fan fi lter, t he amb ie nt a ir filt er, th e co ne filters i n th e hig h & lo w pressu re
gas in lets an d the turbi n e mufflers/fi lter.
• Perform verific atio n pr oc ed ur es d escrib ed in Ch apter 4
• Calib r ati o n of the tra ns du cer s & solen oi ds if necessary.
Every 10,000 hours or e very two ye ars, whi che ver occurs soon er, the i nt ern al oxyge n s ensor sho ul d
be rep lac e d.
Mainte na nc e on the Vel a s ho ul d o nly be c ar rie d out by a tr ai ne d and auth oriz ed s erv ice t ech ni ci an.
VIASYS Healthcare will make available t o qualified technicians, service m anuals and such item s as
circu it dia gra m s, comp o ne nt parts l ists, cali brati o n instructions an d other i nform ati on to a ssist in re pa ir
of thos e parts of the v entil ator des ig nated b y the m an ufact urer as re p air a bl e item s.
The dr a wi ngs, di agrams an d schemat ics i ncl ud ed in th is m a nu al are for ref ere nc e only an d may be
up dated s e parately from this manu al aft er p ub lic ati on. For current revisi o ns of all documentation,
co nt act VIASYS Health ca re Tech Sup p or t a t th e numbers p r ovid ed in Appen dix A.
L1534 Revision B December 2004
Chapter 2 Theory of Operation
General Device Description
The Vela Ventilator uses a rev olutionary tur bine gas deliv ery system with sophist icated m i cropr oc essor
contr ol. Its Graph ica l Us er Int erfac e provid e s sup p ort for p ed iatric to adu lt pati ents. The Vela can
de liv er cl in icall y adv a nce d mo des of ve ntilati on lik e Pres sure Su pp ort a n d can be po w ere d wit h a n
internal battery or AC power f or an mo re exte ns ive patien t rang e.
Pneumatic System Overview
The Vela ventilator pneumatic system is elec tromec ha nical and is c om pris ed of four major subs ystems,
each containing sev er al c omponents. Thes e systems are t h e flow deliver y system, the ex halation
system, the saf ety system and the inspirat ory hold v alv e. Indiv idual subsy s t ems are discussed in detail
be lo w.
Flow Delivery System
This electrom echanical system controls all inspirat ory flow to the patie nt. The syst em delivers flow to
satisfy criteri a f or ma ny b r e ath types, i ncl u di n g vo lum e c ontroll e d, pre ssur e controll e d, an d pressure
supported. The system c omprises a turbine, differential pr essure transduc er, 2 auto- zer o valv es , and an
optica l e nco d er spe ed tr ansd u cer. When a b r eath is i niti ate d, the c ontrol le r controls th e spe ed of the
turbi n e to ac hi eve t he req uir e d flow rate.
The spe ed an d differential pr e ssur e tran sd uc er si gn als f unct io n as c ontrol i np uts to e ns ur e that th e
prope r flow rate is d el iv ere d even whe n b ack pres sure vari e s. Periodica lly, the auto z ero valv es activ ate
to refer e nce bo th sid es of the differ entia l pre ssur e tran sd uc er to ambi e nt p r essure. The offset is
recor d ed by th e co ntroll er, a n d is u se d as a corre ction for futur e pr essure measur ements . This
compensates for long term and temperature drift. Materials ex posed to patient gases include
com patibl e p la stics, al umin u m, an d plated stee l.
Exhalation System
The exhalation system c ontrols the flow of gas from the p ati ent’s lu n gs duri ng th e exh al ati on ph as e of a
breath. Th is e l ectrom ec ha ni c al s ubsystem i s mad e u p of a n exha lat io n valve, a fl ow tr an sducer, a
differ entia l pre ssur e tran sd uc er, an air wa y p r essure tr ansd ucer, an d thr ee auto z er o sole no id v alv es.
During exhalation, the outflow of gases is regulated by the exhalat i on valv e to achieve the set PEEP.
The exh al ati on valv e is c om pr ise d of an e le ctromag netic li ne ar actuator ope r ating ag ai nst a mech an ical
po pp et/se at. The gas fl o w travels t hro ug h the flo w transd uc er. The fl ow tr ansd ucer is a v ari ab le orific e
type an d cre at es a differ entia l press ur e pr op ortio n al to fl ow. This diff erenti al pr essur e is t r ansmitte d to
the d ifferential pres sure trans ducer, w hic h converts the pre ssur e si gn al to an el ectric al si gn al. The
contr ol ler uses this si g na l for fl ow tri gg eri n g a nd to m o nitor e xha le d tida l vo l ume. Th e airw ay pr essure
trans du cer r ea ds pressure in the e xh al ati on leg of the patie nt circuit. This signa l is used as a fe e db ack
sign al fo r co nt ro lling PEEP, p r essu re cont ro l, pr essu re suppo rt, a n d variou s pr es su re mon ito rs.
Periodically, the auto zero valves activate to refe r en ce the differe nti al a n d airway pressur e tran sd uc ers
to ambi ent p r e ssur e. The offset is rec or de d by th e co ntroll e r , and is us e d as a n offs et for future
pressure measurements. This compensat es f or long term and tem perature drift. Materials exposed to
patie nt ga ses i ncl ud e c ompati bl e pl astics, al uminu m, an d st ainle ss steel.
L1534 Revision B December 2004
18 Vela Ventilator s
Safety System
The mechanical safety system ens ur es that the pa tient ca n breath spont aneous ly from room air and
that th e patie nt press ur e is l im ited t o a m aximum pres et val u e in t he event of a ve nti lat or malf unct io n.
This mechanical system c onsists of a pres sure relief v alv e and a sub ambient relief valve. In the ev ent
of a ve nti lat or malf unct io n th a t results in hi gh press ur e, the pres sure is l imi ted b y a re li ef valv e. The
relief va lv e co n sists of a us er-ad justab le, spri ng-lo ad e d p op pet a ctin g a g ai nst a s eat.
In the event the ve ntilator f ail s to de liv er a b r eath, the patie nt may i ns pir e sponta n eo usl y by dr awin g
room air thro ug h the s u b am bi ent reli ef va lve.
Materia ls ex p o sed to p atie nt gas are al umin um, comp atible rub ber, an d co mpat ib le pl astics.
Inspiratory Hold Valve
The i ns pir atory hol d valv e is a n el ectrome ch an ica l so le n oi d valv e. If activ ate d, the i ns pir atory ho ld
valv e blocks flow between the flow deliv ery system and the patient. This valve is activ ate during
inspir atory ho ld and maxim um ins pir atory pressur e ma ne uv ers. Mat eri als expos ed to p ati ent g as es are
al uminu m a nd com patibl e ru b ber an d plastic.
Oxygen Blending System
The optional oxygen bl ending system is made up of an O2 Inle t Trans duce r, five solenoid valv es, five
flow orifices, a n in let fi lter, an d a n acc um ul at or. Whe n a breath is in itiat ed, the tur bi ne dr a ws mix e d gas
from th e acc u mulator. Filt er ed air is draw n into t he accum ul ator thro ug h the fi lter. Oxyg en is supp li ed
to th e accu mula to r throug h the soleno ids and o r ifices. Th e co nt ro lle r opens a n d clo s es the valves a s
re qu ired to supply the correct amo u nt of oxy ge n to s atisfy t he O 2 setti ng a nd th e flow de mand. Th e
signa l from th e O2 inlet pr essure tr ansd ucer is us ed to com pe ns ate d deli v ere d O2 fo r O2 inlet pressure
variati ons. S ur f aces ex pose d to pat ie nt gas are c on struct e d from c om patibl e pl astics, pl ated ste el, and
al uminu m.
Ther e is a ls o a n o ptio n al o xygen inl et p ort, w hic h all ows fo r low - flo w titratio n of ox yg en int o the ga s
output of th is d evice.
Electronic Over view
The Vela ventilator electronic system is compris ed of sever al s ubsystems, each containing numerous
com po ne nts. T hese subsyste ms are the G UI System, th e Pow er System, the M ai n C ontroll er Syst em,
and the Exhalation and Flow Deliv ery syst ems. Individual subsystems ar e discussed in detail.
User interface module (UIM)
The UIM c o nsists of a 1 0.4- in ch, 800x6 00 ac tive matrix L C D wit h a n a na l og resistive t ou ch scr ee n
over la y, a back light in verter, a set of m em br an e key pan els , an optic al encod er, a nd a Co ntrol PCB.
Software an d the to uc h scr ee n provide a set of cont ext sen sitiv e soft keys. The m embra n e p an el
prov id es a set of hard ( perm a ne nt) key s for de dicate d functio ns. Se lect in g the function with a s oft key
an d adj usti ng the s etting u si n g the optical e n cod er c ha ng es a parameter. The par am eter is acc epted or
ca nceled b y pr essing th e appro pr ia te memb ra ne key.
L1534 Revision B December 2004
Service Manual Theory of Op eration 19
LCD & TOUCHSCREEN
(1 & 2 )
24VDC
DC-DC
CONVERTERS
CONTROL PCB
(7 )
5V
5V, PRN PO RT
3.3V, DI G LOGIC
MEMBRANE P ANEL WITH
EMBE DDED LE D' S
BACK LI GHT INVERTER
(6)
DI GITAL
DI GI TAL
HI GH S PEE D
SERIAL
(3 & 4)
(5)
UNIVE RSA L S ERI AL B US (FUTURE)
PRI NTER
RS232
RS232
RS232 (MIB )
(CRT)
TOUCH
S CREE N
BA CK LIGHT AC VO LTAGE
F i g u re 1 -- User Interfac e D esig n Mo dule Block Diagra m
The UIM perfor ms all ve ntilator control functions, gas c al cu l ations, mon itoring an d us er int erfac e
functi o ns. The UIM us es a Gr ap hical User In terface (GUI) vi a the activ e m a trix SVGA L CD and res istive
touc h scr ee n to provide s yste m and pati ent i nform ati on to the user an d to all ow the us er to modify
vent il ator settings. The Mo nit o r MCU ha nd les all us er int erfa ce requ ire me nt s, incl u di ng up datin g the
active matrix liquid crystal disp l ay (LCD), m o nitor in g th e me mbra n e key p a d, an al o g res ist ive to uc h
scre en, a n d o p t ical en co der f o r activity. Th e Monitor M CU a lso performs all the i np ut/o utput funct io ns of
the UIM, i nc lu d in g RS- 23 2, pri nter, vide o out put, and IE EE 10 73 M e dical I nform ati on B us (MIB).
Com mu nic ati o n betw ee n the Co ntrol a nd M on itor M CU’s is acco mplis he d via an 8 bit du a l port S RAM.
Liquid Crystal Display
The l iq ui d cryst al dis pl ay (LCD) provid es g r a p hic al an d dig ita l fee db ack to th e cli ni ci an. The pane l is a
10.4 ” SVGA, 8 00x6 00 pixel, active matrix LCD. The LCD is used to i mp lement the grap hi c al u ser
interf ac e (GUI) . It provides all of the ad just ab l e controls a nd al arms, as well as di sp lays wa veform s,
lo ops, di gital mon itors an d ala r m status in r e al tim e.
L1534 Revision B December 2004
20 Vela Ventilator s
Touch Screen
The touc h scr e en is a 1 0.4 ” a na lo g res istive over la y on a p i ece of gl ass, w hic h is pl aced over an LCD
scre en. The touch s cre en an d the LCD toge ther pr ov id e a set of soft ware conf ig urabl e s o ft keys. The
softw are en ab l es the key s to be c ontext sen sitiv e. The touc h scree n h as a reso lutio n of 1 02 4x 10 24.
Phys ically, th e touc h scr ee n consists of tw o op po si ng trans parent r esistive lay ers se p arat ed by
insul ati ng s pa c ers. To uchin g t he scre en bri n gs th e two op p osi ng layers int o el ectri ca l con t act. The Y
coor di n ate is d eterm in ed by a pp lyi ng a vo lta ge from to p to botto m on the t op resistive layer. This
creat es a volt a ge gradi ent across th is layer. The poi nt of c o ntact form s a v olta g e di vi der, which i s re ad
by th e ana lo g-t o-dig ital c o nver ter. The X c oordi nate is d eter min ed by a p ply in g a v olta g e from l eft to
rig ht on t he bottom res istive l a yer. Ag ai n this creat es a v olt a ge gradi ent and the po int of cont act forms a
divid er, w hic h i s rea d w ith a n an al og-to- di git al converter.
Membrane Panel
The mem bra ne pane l provide s a set of p erm a ne nt d ed icated keys, w hic h ena bl e control o f venti lat or
functi o ns. The mem bra n e p an el a ls o pr ovide s visu al displ ay usi ng emb e dd ed lig ht em ittin g di o des
(LED s). The m embra ne pa n el cons ists of me mbra n e sw itch es, w hic h are r ea d by t he m o nitor CPU. T he
switc hes f orm a matri x of ro w s and co lu mns. A key clos ure causes an int er r upt to th e mon itor CP U,
which r es po nd s by scan ni ng the k ey matrix t o d eterm in e whic h ke y has bee n pr essed.
Light Emitting Diodes (Leds)
Som e of th e membra ne k eys requir e LED’ s to indi cate w he n the key i s act ive. The LED’ s are
emb e dd ed int o the me mbra ne pane ls.
Optical Encoder
The optic al en c od er a ll ows s et t ings to b e mo dified. The setti ng is select ed by pr essin g a s oft key o n th e
LCD and th e n mod ifi ed by turni ng th e optic al enc od er (data dial) to c ha n ge the va lu e. When th e
enco der i s rota ted two puls e st reams ar e gen erat ed, p h ase A an d B. Wh en the enc od er is turned
cloc kwise, phase A le ad s B by 9 0 de gr ee s. When th e d ire ction is coun te r cloc kwise, phase B le ad s A
by 9 0 d egre es. The e lectro nic s use s the ph a se i nform ati on to driv e an u p- do wn co unter, which i s re ad
by th e mo nit or CPU. The optic al e nc od er is n ot int errupt-dr iv en an d therefor e must be po ll e d by the
monitor CPU.
Back Light Inverter
The back li ght i nverter co nv ert s 5 VDC int o th e hig h freq u en cy AC v olta g e nec essary to p ow er the LC D
back light, whic h is u se d to illuminate the LCD.
Power System
The Pow er Sys t em cond iti ons an d co ntrols e l ectric al en ergy from th e AC lin e in p ut an d the inter na l
battery. When en ergy is a va il ab le fro m th e AC li ne, the ventilator o perat es from this s o urce, an d als o
rech ar ges t he i nter na l b attery. Whe n AC l in e po wer is n ot av ail a bl e, the po wer system draws energy
from th e int ern al battery. T he po wer s ystem uses e nergy ef ficie nt DC-to-D C conv erter techn ol og y to
convert e n erg y from the AC li ne or battery to appropri ate v o ltag es an d cur r ents to su pp ly po wer t o
vent il ator compon ents an d sys tems.
Main Controller System
The Mai n C ontroller Sy stem is com pris ed of three Pre ssur e Trans ducers, an A na lo g-t o-Digit al
Conv erter, tw o Dig ita l-to-A n al og Conv erters, the In put-Output Processor, Solen oi d V alv e s, an d the
Watchd og and Ha rd ware Fault Monito rs.
L1534 Revision B December 2004
Service Manual Theory of Op eration 21
One of the pressur e tran sd uc ers me as ur es the patie nt circu it pressure. Thi s pres sure is an input to the
contr ol ler. A dif f erentia l pr essure tr ansd ucer measur es th e pres sure across the tur bi ne. T his pres sure is
also a n i np ut to the co ntroll er. A secon d d ifferential pressur e transducer is used to m ea su r e the fl o w at
the o utl et of th e ex ha lat io n valve. Th is pr essure is al so an inp ut to the co n t roller.
Analo g to di git al c onverter s a r e us ed to cha ng e th e ana lo g press ur e si gn als i nto m e asur ed bi nary
num eri c valu es for use by th e micropr oc ess o r in th e co ntroll er.
Digita l to A na lo g conv erters ar e us ed to chan ge th e bin ary n umeric comma nds ge n erat ed by th e
micropro ce ssor in the con t rolle r in to analog si g na ls whic h dr ive th e tur bi n e and ex ha lat io n valv e.
The Input-Output Processor is a sma ll mi croc ontroll er w hi ch, under s oftwar e co ntrol, pe rfo r ms sever al
repetitiv e tas ks such as generating the refr es h signals for the display system, cycling t he A-to-D
convert ers thr o ug h a pattern o f meas ureme nt s from the multipl e si g na l sour ces, and s ca nn in g the
contr ol panel for pressed buttons. Suc h repetitive ta sks are ther eby off loaded from t he M ain Process or.
Solen oi d V alv e s and Va lv e Dri vers (i nclu di ng the A uto Zero valv es) are empl oyed o n th e Circuit
Pressur e tran s ducer an d o n the Tu rb in e Diff erenti al Pr essu re Transd uc er. These va lv es a llo w the
contr ol ler software to c om p en sate for lo ng te rm drift and te mper at ure i n du ced z er o shift in the pressure
trans du cers by peri o dical ly rechecki ng the z ero pressur e re ad in gs. Sim il ar sol en oi d valv e s are
emp lo ye d i n th e Oxyg e n Bl en di ng System. T he v alv e driv er s for the A uto Zero an d Blen der v alv es are
similar.
The Mai n Pro c essor is a 38 6- type CPU whic h co ntrols a ll ventilat or fu nctio ns. All us er sett ings for
al arms, contr ol s, ventilat io n mod e, waveform , and m o nitori e d d ata ar e sto r ed here and ar e combi n ed
with me asur e d pres sure, flo w, an d sp e ed data to ca us e the ventil ator to function. The alg orithms,
formula e, a nd contr ol functio n s whi ch defin e vent il ator be ha vior are c ontai ne d i n the soft ware pr ogram
execut ed by th e CP U.
The Watchdog Timer and Hardware Fault
Monitors sh ut do wn the v entil ator if a m alf u n cito n is d ete cted. The W atchd og Tim er c on si sts of two
timers an d a P AL co ntain in g a state mac hi n e. The Ma i n C ontroll er C PU must co mmun i cate with a state
machi ne at int e rvals withi n a ti me w in do w set by the t wo tim ers. The CP U must obta in a key from the
PAL an d se n d the correct ad d r ess a n d d ata resp o nse ba ck to the st ate ma chine at each i nterv al. If the
resp o nse is inc orrect, or com e s at an inval id t ime, the Watc h do g shuts d o w n the CPU an d forces th e
vent il ator har d ware to a s afe state. The Har dw are F au lt Monitors che ck the status of th e pow er su p pli es
to the v entil ator electornics. If any is out of the sa f e oper ati o ng range, the v enti lat or w ill s h ut down and
ca nnot b e made to oper at e until the fa ult is co rrected .
Exhalation System
The electrical portion of the ex halation system is com prised of the Exhalat i on V alv e Dr iv er Circuitry.
The dr iv er co n verts the low volta g e si gn al o utp ut by a D-to-A co nvert er i nto a controll e d c onst ant
curre nt w hic h energizes the l in ear s ol en oi d p ositi o ner i n th e exhal ati on v al v e.
Flow Delivery System
The ele ctrical portion of the flo w d eliv ery s ystem is c om pris e d of a 3 Ph as e Brus hl ess Mot or Dri ver, a n d
an O ptic al S pe ed Tr ansd ucer.
The 3 Phas e Br ushle ss D C M otor Driv er co n verts the low volta g e si gn al o utp ut by a D-to-A co nvert er
into t hre e co ntr oll e d curr ents which en er gize the thr ee m oto r ph ases a nd c ause the motor to creat e a
torq ue, r esu lti n g in motor r otat io n. The to rq ue generated is a function of curr ent, and theref ore of the
contr ol v olt ag e from th e D-to- A con vert er. The s pe e d of rotatio n is m o nitor ed by th e optic al S pe ed
Transd ucer. Th e transd uc er outp uts a tra in o f puls es with a freq ue ncy prop ortion al to the r otation al
spee d of th e motor. Th is p uls e trai n is a co nt rol fe ed b ack in put to th e controll er.
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22 Vela Ventilator s
Oxygen Blending System
The electrical portion of the optional oxygen bl ending system is made up of a saf ety solenoid, a
pres sure re g ul ator s et to 40 PSI, an O2 Inlet Transdu ce r, five Solen o id Valves, on e Nebu lize r so le no id ,
an d the dri ver circu itry for the sol en oi d valv e s.
The Oxyge n In l et Pressure Trans d ucer me a sures the inco ming g as pressure s o th at O2 de liv ery c an be
com pe ns ate d for in let pres sure fluct uatio ns.
The Sol en oi d Valv es are en e r gized an d de e nergize d und er softwar e control b y the M ai n contr ol ler to
suppl y the corr ect am ou nt of oxyge n to s atis f y the curr e nt O2 setti ng an d curre nt gas flo w d eman d.
The dr iv er circuitry tra nsl ates the bin ary lo gic sig na ls pres en ted b y the co ntroll er to lar ger voltag e and
cu rren t s su itab le fo r en ergizing th e So leno id Valves.
L1534 Revision B December 2004
Chapter 3 Disassembly & Assembly
General Instructions and Warnings
When p erform i ng th e proc ed u r es in this ch ap ter, re fe r to th e Ve la wiring and tu bing diag rams.
Refere nc e co pi es of th es e are loc ate d in Ap p en dix B of this manu al. E nsure that y ou foll o w the se safety
warn in gs and precau tio n s:
F i g u re 3.1 Battery Dis co n n ect Molex Co nnector
WARNING
Always disc o n nect th e mai n power c a bl e be f ore r emovi ng the instr ument cover a nd disc on ne ct the
battery o nce th e top c ov er and batte ry tray ha ve been re moved to p r even t in ju ry an d/ or da mage to the
VELA V e ntilator System (s ee fig ure 3.1).
CAUTION
Th e Ve la con t ains ESD suscep tible componen ts. Ensu re you a r e p r op er ly g r ou nded bef or e perfo r ming
any s erv ice or mainte na nc e pr oced ures a nd store E SD sus ceptib le el ectri cal com po ne nt s in a n a nti-static bag to prevent da mage to the component.
Note
When the batteries are disconne cted, the system will automatica ll y re-set the battery status memory and will
initiate an 18-ho ur re-charge cycle upon re-connect. During th is p eriod, the red DC status light will remain on.
If the DC status light remains lit after the initial c harging period has expired, cont act VIASYS tech support as
described in Appendix A for a replacement battery.
Note
Do not cut the main harness tie wraps since the entire harness is regarded as on e component.
Note
The terms left and right refer to a view from the front of the unit looking towards the rear.
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24 Vela Ventilator s
Required Tools
Lo ng & sh ort P hil ip s screw drivers
Flat bla de d scr ewdriver
¼” Nut Dirver
5/ 16” Nu t Driver
7/8” N ut Dri ver
11/32 ” Nut Dr iv er
Digital Volt Meter
Tack p ul ler or Ne ed le no se d pli ers
Diagona l cu tte rs
1 ” a nd ¾ ” o pe n ende d wr en ch es
Disassembly and Reas sembly Procedures
To perform a complet e d isa ss emb ly of the unit, fol lo w al l of the ste ps i n e a ch rem oval section, in the
order pres ente d in t his c ha pte r. To reas sem b le th e unit, fol lo w al l of the ste ps i n e ach inst all ati on
section, st arting with the last co mpon en t and finishing with th e power ca ble insta l la tion instru ctions.
Power Cab le
Figure 3 . 2 P ow er Ca ble Connect or w ith Guard
Removal
1. Rem ov e th e (2)Phi lli ps pa n- h ea d scr ews in the to p porti on of the po wer c ab le gu ard at the r ear of
the u nit (s ee fi gure 3.2)
2. Remove the gua rd an d unplug th e power ca ble.
Installation
1. Plug th e pow er cab le i nto the rear of the un it.
2. Instal l the pow er ca bl e gua r d with t he (2) Ph i lli ps p a n-h ea d scre ws i n the t op porti o n.
L1534 Revision B December 2004
Service Manual Disassembly & Reassembly Pr ocedures 25
Top Cover Part number 15893
Removal
1. Rem ov e th e po wer cab le.
2. Remove the (3) Ph illip s pan -hea d scre ws in th e up per rea r o f th e fron t pane l (if p r es ent ).
3. Rem ov e th e (4) Phil li ps p a n-h ea d scr ews in the back pan el.
4. Rem ov e th e (3) screw s from t he botto m of each s id e of th e vent il ator (if pr esent).
Note
The configuration of the screws securing the cover will depend on the model of Vela that you are working with.
5. When all screws have been removed, slide the top cover towards t he rear of the unit and lift off.
CAUTION
The SVGA outp ut ribbon cable lies directly bene ath the top co ver assembly running from the front of the Vela to
the rear. It can be damaged if care is not taken when removing the cover. Make sure that the cover clears this
cable before slid ing it back.
Installation
1. Instal l the top c over by sl id in g it tow ard th e front of th e unit, over the s id e r ail s, an d sna p i nto p la ce.
2. Instal l the (4) P hil li ps p a n-h ea d screws i n th e back pa n el.
3. Do not re -install the (3 ) Ph illips p a n- head scre ws in the upper rea r o f the front pan el if p r esent.
Th ey hav e been re move d from la te r ve rsions o f th e Ve la .
4. Instal l the pow er ca bl e.
Cover mo unting s c rews
on re ar of ins tr um ent
F i g u re 3.3 Cov e r As sembl y fro m the rear
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26 Vela Ventilator s
Battery Tray Part Number 10633
Removal
1. Rem ov e th e po wer cab le an d t op c ov er.
2. Rem ov e th e (4) Phil li ps p a n-h ea d scr ews in the battery tray.
3. Lift the battery tray out of the un it.
4. Disc on n ect th e batter ies fr om the w hit e Mo le x DC p ow er c o nn ector (s e e fi gure 3.4
Tab
F i g u re 3.4 L arg e w hite Mo lex b atter y d i sco n n ect
To rele ase c o n nect or, push in lock in g tabs
To attac h p us h unti l lo cking ta bs e ng a ge.
Note
When the batteries are disconne cted, the system will automatica ll y re-set the battery status memory and will
initiate an 18-ho ur re-charge cycle upon re-connect. During th is p eriod, the red DC status light will remain on.
If the DC status light remains lit after the initial ch arging period has expired, conta ct VIASYS tech support as
described in Appendix A for a replacement battery.
Installation
1. Conn ect the white M ol ex DC po wer c o nn ector.
2. Ensure the M ol ex co n nect or is pus he d do wn i nto th e unit be hi nd th e muffler tube s and ins t all th e
battery tray. The tray is c orr ec tly inst al le d wh en th e wire s run tow ar ds the rear of the un it.
3. Secure the battery tray to t he l eft & rig ht pa nels with (4 ) Phillips pa n- head scre ws.
4. Instal l the top c over an d r e-conn ect th e pow e r cab le an d the power c ab le g uard.
Battery Tray Parts List
Item Part number Des c ription Qty U M
1 21363 Tray, battery 1 Ea
2 52000-0019 0 Grommet 11/16 id 0 Ea
3 21543 Battery 12v, 2.7 Ahr, ni-m h 4 Ea
4 15719 Cable assy, battery tray 1 Ea
5 2 0 7 42 Bracket, capac i t o r 2 E a
6 21068 Foam pa d, capacito r bracket 2 Ea
7 64084 Cap a cito r ele c t 0.1f 63vdc 1 Ea
8 04383 Washe r , lock int #6 4 Ea
9 07212 Nut, 6-32 x .0 93 depth 8 Ea
1 0 0 5 0 38 Ti e , s t r a p 4 Ea
11 08231 Mounting b r ac ket, cable tie 2 Ea
1 2 0 7 8 03 Cable t i e 2 E a
14 09349x Tape, adh-2 s,2" x .045" 0 Ft
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Service Manual Disassembly & Reassembly Pr ocedures 27
F i g u re 3.5 Batter y T ra y a n d large cap acitor asse mbly
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28 Vela Ventilator s
PCMCIA Cards
The PCMCIA c ard is lo cated insi de the un it. It conta ins the Vela soft ware.
Card re le as e
butto n
F i g u re 3.6 PCMCI A Card in p l ace
Removal
1. Rem ov e th e po wer cab le, to p cover, an d batt ery tray.
2. Push in t he button u n der the card to rel e ase. (see fig ure 3.6)
3. Gentl y slid e the car d o ut of it s socket.
Install ation
1. Sli de th e card i nto th e so cket i n the dir ecti on of the arro w pri nte d on the car d.
2. Click car d i nto pl ace.
3. Instal l the batte ry tray, top c ov er, an d po wer cable.
Left Panel
The l eft pa n el i s structur al on l y and has no c ompo ne nts att ach e d to it.
Removal
1. Rem ov e th e po wer cab le, to p cover, an d batt ery tray.
2. Rem ov e th e (2) Phil li ps c ou nt ersi nk scr ews at the rear of th e pan el.
3. Rem ov e th e (1) Phil li ps c ou nt ersi nk scr ew in the upp er fro nt of the p a ne l.
4. Lift o ut the left pa ne l.
Installation
1. Sli de th e fro nt of the l eft pan e l behi n d the li p on th e fro nt p a ne l a nd ali g n the back of th e pan el with
the re ar pa ne l ed ge.
2. Instal l the (2) P hil li ps c ou nters ink scr e ws i n the r ear of the r i ght p a ne l.
3. Instal l the (1) Philli ps c ou nter sink s cre w in the up per fr ont of the ri g ht pa n el.
4. Instal l the batte ry tray, top c ov er, an d po wer cable.
L1534 Revision B December 2004
Service Manual Disassembly & Reassembly Pr ocedures 29
Right Panel Containing the Power PCB P/N 15894
Note
The internal battery fuse is lo cated on the power PCB. Call Viasys if this fuse nee ds replacing.
Removal
1. Rem ov e th e po wer cab le, to p cover, an d batt ery tray.
2. Rem ov e th e (2) Phil li ps c ou nt ersi nk scr ews from the right si de of the r ear p an el.
3. Rem ov e th e (1) Phil li ps c ou nt ersi nk scr ew in the upp er fro nt of the ri ght pa ne l.
4. Rem ov e th e (1) Phil li ps p a n-h ea d scr ew i n th e low er ce nter of the ri g ht pa n el.
5. Gentl y lift o ut the pa ne l a nd the po wer PCB. Lay th e pa ne l flat and m ak e the fo ll owin g
discon ne ctions:
Ref on Pwr
PCB
Conn ector Des c Conn ection made
Cable Assy
P/Number
J1 26-pin ribbon cable to J2 on main PCB P/N 15494
J2 3-pin to fan assembly
J5 14-pin to J5 on main PCB (in main harness)
J6 10-pin to P2 on turbine motor driver PCB
J7 small 2-pin to main power switch
J300 large 2-pin to battery DC po wer (in main harness)
J400 4-pin quick disconnect to SVGA PCB
P1-L/N AC line in to power (black-power, white-ne utral) P/N 15890
to ground lug (ground)
Note
Do NOT re move the connector from J4 of the power PCB.
Installation
Make the f oll o win g con n ecti o ns to th e Po w e r PCB.
Ref on Pwr
PCB
Conn ector Des c Conn ection made
Cable Assy
P/Number
J1 26-pin ribbon cable from J2 on main PCB P/N 15494
J2 3-pin from fan assembly
J5 14-pin from J5 on main PCB (in main harness)
J6 10-pin from P2 on turbi ne motor driver PCB
J7 small 2-pin from main power switch
J300 large 2-pin from battery DC power (in main harness)
J400 4-pin quick disconnect from SVGA PCB
P1-L/N AC line in to power (black-power, white-ne utral) P/N 15890
from ground lug (ground)
WARNING
Ensure that the power c ab le s are corr ectly con ne cte d to prevent i nj ury a n d/or d am a ge to the unit.
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30 Vela Ventilator s
CAUTION
Ensure that J 5 is pi n ne d pr op erly s inc e an i n corre ct co nn ec tion c o ul d dam ag e th e pow er PCB.
6. Sli de th e rig ht pa ne l i nto th e front pa ne l, en s uri ng th at it res t s on th e botto m rail.
7. Instal l the (1) P hil li ps p a n-h ea d screw i n th e l ow er ce nter of the p a ne l.
8. Instal l the (1) P hil li ps c ou nters ink screw in the uppe r fron t o f th e pane l.
9. Instal l the (2) P hil li ps c ou nters ink scr e ws i n the sid e of th e r ear pa ne l.
10. Instal l the batte ry tray, top c ov er, an d po wer cable.
Note
The Vela right panel assembly with the power board attached is supplied as a sin gle complete assembly part
number 15894. Do not attempt to disassemble o r to replace individual component s.
L1534 Revision B December 2004
Service Manual Disassembly & Reassembly Pr ocedures 31
Figure 3 . 7 Ri ght Panel and Po w er PCB
L1534 Revision B December 2004
32 Vela Ventilator s
Front Panel Part number 15869
Removal
1. Rem ov e th e po wer cab le, to p cover, battery tr ay, right p a ne l , and left p an el .
2. Disc on n ect th e foll owin g from the mai n PCB:
JP2 40-pi n ribb o n c ab le to JP1 on th e SVGA o ut PCB
J301 12-pi n to J3 01 on th e blen der PCB P/N 1 54 97
Note
Disconnect the video cable from JP2 on the main PC B rather than from JP1 on the SVGA out PCB.
3. Disc on n ect th e gre en oxyge n ne bu liz er tu be.
4. Rem ov e th e (2) Phil li ps p a n-h ea d scr ews be hi nd th e fro nt p an el at the l o w er left a n d ri ght.
5. Disc on n ect th e 1/8 ” si lic on e tube # 4 from P2 an d #5 from P 1 o n the ex ha l atio n d ifferential
trans du cer, an d #1 from th e t urb in e.
6. Disc on n ect th e 1/16 ” s il ico n e tub es from t he common (fr ont) ports of th e tur bi ne outlet a ut o-zer o
solen oi d (to the ma in tu bi n g har ne ss), the turbin e i nl et aut o-zer o s ol en oi d (to the tur bi n e), and the
air way pressur e a uto-z er o so l en oi d (Nafi an tub e to th e ex h al atio n v alv e recept acle).
7. Disc on n ect th e foll owin g from the mai n PCB:
J4 8-pin to J1 o n th e FIO2 mo nit ori ng PCB
J900 2-pin (al arm l ou d ness) to al arm potentiom eter
J701 5-pin to turb in e optic enc od er an d therm istor
J4 01 4- pin to e x ha la tion valve
U719 fib er op tic to re ar pa ne l co nn ecto r
J5 14- pi n to J5 on power PCB
J3 02 2- pin to in sp ira t or y ho ld soleno id on ma nifold base
J2 26- pi n to J1 on power PCB P/N 1549 4
J9 05 3- pin to J2 on remote a l ar m (nur se ca ll) PCB
AL901 (h ar d- wired ) 2- pr on g to a l ar m ca ble co nnector
Installation
1. Conn ect the gree n ox yg en ne bu liz er tu be.
2. Conn ect the fol lowin g to t he m ai n PCB:
J401 4-pin from ex ha lat io n valve
J701 5-pin from tur bi ne op tic en co der an d thermistor
U719 fib er op tic fro m rea r pane l co nn ecto r
J5 14-pi n from J5 on power P CB
J2 26-pi n from J1 on po wer PCB P/N 154 94
J905 3-pin from J2 on rem ote a lar m (nurse call) P CB
3. Sli de th e fro nt pa ne l i nto p la c e and s ec ure the (2) Phill ips panh ea d scr e ws beh in d th e front pa ne l
at the l o wer l eft and rig ht.
4. Conn ect the fol lowin g to t he m ai n PCB:
J302 2-pin from in sp irator y ho ld s ol en oi d on man ifol d b ase
J4 8-pin from J1 on the FIO2 mon itor in g PCB
J301 12-pi n from J3 01 o n the bl en der PCB P/N 154 97
AL901 (h ar d- wired ) 2- pr on g fro m a l ar m cable conn ecto r
J900 2-pin al arm l ou dn ess cab le fro m al a r m potentiom et er
L1534 Revision B December 2004
Service Manual Disassembly & Reassembly Pr ocedures 33
5. Conn ect the 1/16 ” s ili co ne tub es to the co m mon (fr ont) ports of the turbi n e outlet auto-zero
so le no id (from the ma in tu bing harness), the tu rb ine in let a uto-z er o sol e n oi d (from the turbi ne), an d
the a irw ay pres sure auto-zero solen oi d (Nafi a n tub e from the exh al ati on v al ve rec e ptac le).
6. Conn ect the 1/8 ” silic on e tu be # 4 to P2 a n d # 5 to P1 o n the exhal ati on diffe renti al tr ansd u cer, a nd
#1 to the turbine.
7. Conn ect the fol lowin g to t he m ai n PCB:
JP2 40-pi n ribb o n c ab le from JP 1 on th e SVGA out P CB
Note
Ensure that the fiber optic cable runs under the turbine muffler, that the tubing runs over the nebulizer line and is not
pinched in betw een the front and base panels, a nd that the cabl e from J701 is se curely connecte d to the turbine.
Parts List – Front Panel Part Number 15869
Item Part Number Part Description Qty U/M
1 21374 PANEL, FRONT 1 EA
2 52130 PCBA, MAIN 1 EA
3 53002-16206 SCREW, 6-32 X 3/8 STL ZN PL T PPH PNH 12 EA*
4 52000 PCBA, VELA VI DEO (SVG A PCB) 1 EA
5 15532 IC, PAL, PROGRAMMED 1 EA
6 15868 DISPLAY MODULE ASSY 1 EA
11 21368 BEZEL, DISPLAY 1 EA
12 80435 SWITCH, MEM BRANE 1 EA
15 44027 NUT, 4- 40,LOCKING, HEX, STEEL 2 EA*
16 71046 NUT, 1/4- 28, E-KEPS 1 EA*
21 66100 TOUCHSCREE N, 10.4" RESISTIVE" 1 EA
23 52000-01177 TAPE FOAM .025 THK .31 WIDE TWO SIDE D 0 RL*
25 56060-30011 OPTICAL ENCODER 1 EA
26 52000-00475 NUT HEX 1 EA*
27 53027-13802 WASHER, LOCK 3/8 1 EA*
28 20415 CONN, FTG 1/8 TUBE TAPER 1 EA
29 15991 CONN ASSY, FLOW SENSOR BHD, VELA 1 EA
30 15961 CABLE ASSY, FLOW SENSOR - MAIN BOARD 1 EA
31 15962 CABLE ASSY, VIDEO BOA RD TO POWER 1 EA
32 15963 CABLE ASSY, VIDEO BOA RD TO MAIN BO ARD 1 EA
33 21560 KNOB, SPINNER-1.50 1 EA
34 53002-46204 SCR 6-32X1/4 SS PPH PNH 4 EA*
35 10632 TUBING ASSY, 1/8 X 1/16 3 EA
* Commonly found hardware ite ms are not supplied by VIASYS Healthcare.
L1534 Revision B December 2004
34 Vela Ventilator s
Figure 3 . 8 Fro n t pa nel w ith main PCB
Main PCB (on Front Panel) P/N 52130
Removal
1. Rem ov e th e po wer cab le, to p cover, battery tr ay, right p a ne l , left pa ne l, an d front pa ne l.
2. Disc on n ect th e foll owin g from the mai n PCB:
J801 20-pi n to J8 01 on th e flow se nsor PC B (in harne ss)
J1 210 5- pin (g ray top, g r ee n) to th e flow senso r PCB (in P/N 1596 1 har ness)
J3 10-pi n to the fl ow s e n sor PCB (in P/N 159 61 harn e ss)
J1 211 5- pin (b lu e wire-top ) to th e SVGA PCB
J1 5-pin ( ora n ge wire) to SVGA P CB (pos iti on wire o n 2
nd
pi n from r ig ht)
J1 5-pin (gray-left) to SVGA P CB
J6 01 5- pin to SVGA PCB
3. Lo os en (7) Ph il lip s pan-he a d s crew s o n the m ai n PCB.
4. Lift the main PCB out of the front panel.
Installation
1. Posit io n th e mai n PCB onto the st an doffs in the fro nt p an el.
2. Tight en (7) Phil lip s pan-he a d s crew s o n the m ai n PCB.
L1534 Revision B December 2004
Service Manual Disassembly & Reassembly Pr ocedures 35
3. Conn ect the fol lowin g to t he m ai n PCB:
J801 20-pi n from J8 01 o n the flow s e nsor PCB (in har ness)
J1 210 5- pin (g ray top, g r ee n) fro m the flow se ns or PCB (in P/N 1596 1 har nes s)
J3 10-pi n from th e flo w s ensor P CB (in P/N 159 61 harness)
J1 211 5- pin (b lu e wire-top ) fro m the SVGA PCB
J1 5-pin ( ora n ge wire) from SVGA P C B (po siti on wire o n 2
nd
pin from right)
J1 5-pin (gray-left) from SVGA P C B
J6 01 5- pin fro m SVGA PCB
Note
The J1 position on the main PCB is lo cated abo ve the J601 con nector and acce pts two 5-pin connectors; the
connector with one wire above the connector with three wires.
4. Instal l the front pane l, left p an el, right p a ne l, batter y tray, to p cov er, and p ow er ca bl e.
L1534 Revision B December 2004
36 Vela Ventilator s
Figure 3 . 9 Fro n t Pa nel w i ri ng dia g ra m
L1534 Revision B December 2004
Service Manual Disassembly & Reassembly Pr ocedures 37
Flow Sensor PCB assembly P/N 15991
Figure 3. 10 Flow Se nsor PCB as sembl y
Removal
1. Rem ov e th e po wer cab le, to p cover, battery tr ay, right panel, left panel, fron t p anel, an d main PCB.
2. Disconnect the (2 ) 1 / 16” ID tub es to th e ma in tu bing harn ess.
3. Disc on n ect th e foll owin g from the fl ow s en sor PCB:
J1 6-pin ( gre y) to mai n P CB P/N 159 61
4. Rem ov e th e (2) 1/4 ” n uts o n t he fl ow s e nsor PCB.
5. Lift off the flow sensor PCB.
Installation
1. Posit io n th e flo w sens or PCB onto the two stan doffs.
2. Instal l the (2) 1 / 4” nuts on the flow se nsor PC B.
3. Conn ect the fol lowin g to t he fl ow s en sor P C B:
J1 6-pin ( gre y) from th e ma in PCB P/N 159 61
4. Conn ect the (2) 1/16” I D tub e s from the mai n tub in g h ar ne ss, # 2 and #3 ( with a black li n e o n it).
5. Instal l the ma in PCB, front pa ne l, left p an el, ri g ht pa n el, bat t ery tray, to p cover, an d pow er ca bl e.
L1534 Revision B December 2004
38 Vela Ventilator s
Exhalation Valve Assembly P/N 15871
Dryer tube
Figure 3 . 11 Exhala tion Va l ve Asse mbly
Removal
1. Rem ov e th e po wer cab le, to p cover, battery tr ay, right p a ne l , left pa ne l, an d front pa ne l.
2. Disc on n ect th e foll owin g from the FIO2 mon it ori ng P CB:
J2 2-pin (cle ar co nn.) to oxyge n s ensor
J3 2- pin (b lu e conn.) to o xyg en in le t so le no id on blen de r a s se mbly
J4 2-pin (red c o nn .) to ne b uli zer s ol en oi d assem bl y on up per r e ar of bl en der
3. Rem ov e (2 P hi lli ps p a n-h ea d scre ws on th e valve cover.
4. Lift o ut the exhal atio n v alv e assem bly.
Installation
1. Ensure the dryer tub e is s ec u rely attac he d to the ni pp le on the ex h al atio n valv e assembl y.
2. Seat th e valv e onto the st an d offs, with t he P CB towar ds the insi de of the un it.
3. Instal l the va lv e cov er u si ng (2) Philli ps pa nh ea d scr ews.
4. Conn ect the fol lowin g to t he FI O2 monit ori ng PCB:
J2 2-pin (cle ar co nn.) from oxyg en s ensor
J3 2-pin ( bl ue c o n n.) from oxyg en inl et sol e no id on bl en der assem bly
J4 2-pin (red c o nn .) from n eb ul ize r sol en oi d a ssembly on up p er rear of bl e nd er
5. Instal l the front pane l, left p an el, right p a ne l, batter y tray, to p cov er, and p ow er ca bl e.
L1534 Revision B December 2004
Service Manual Disassembly & Reassembly Pr ocedures 39
Inspirator y Hold Solenoid and Check Valve Assembly P/N 11382
Removal
1. Rem ov e th e po wer cab le, to p cover, battery tr ay, a nd
le ft pa ne l.
2. If th e front panel is in stal led, d iscon ne ct the cable from
J302 on the main PCB.
3. Rem ov e (2) Ph ill ips pa n- he ad scre ws and lift out the
so le no id .
4. Lift o ut the s pri ng an d ch eck v alv e as sem bl y.
Fi gure 3.12 Inspiratory Hold Solen o id
Installation
F i g u re 3.13 Umbrella check val ve (P/N 21 950)
1. Plac e the sp ri n g (P/N 2 1 97 1) i nto th e ce nter of the c he ck va lve (P/ N 2 19 50 ) .
2. Sli p the sol e no i d over th e spr i ng using the g ui de an d se at into p la ce.
3. Instal l (2) P hi ll i ps pan-h ea d s crew s.
4. If th e front panel is in stal led, conn ect the cable from J302 on the main PCB.
5. Install the left panel, battery tr ay, top cov er, an d pow er c ab l e.
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40 Vela Ventilator s
Manifold Base assembly
Replace three o-r i ngs
Nut se cu ri ng O2
s ensorl
F i g u re 3.14 Man i fo ld b ase assembly (ea rly mod el Vela u n i ts o n l y) ,
bottom panel & O2 hose removed
O2 s ensor pl ac ed
horiz on tal ly for ea s y
access from re ar of
v entil ator
F i g u re 3.15 Man i fo ld Base asse mbly show ing ho rizontal O2 cell for eas y re moval.
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Service Manual Disassembly & Reassembly Pr ocedures 41
Removal
1. Rem ov e th e po wer cab le, to p cover, an d
battery tray.
2. Carefu lly tur n t he un it ont o its side.
3. Rem ov e (2) Ph ill ips c o untersink screws t hat
hold the safety check valve gua rd , and re move
the g u ard.
4. Rem ov e (4) r u bb er fe et.
5. If the left panel is inst al led, remov e (3) Phi lli ps
pa n-he ad sc re ws o n th e left side of the bottom
pa ne l, and if th e front pa ne l is insta ll ed,
remo ve (2) Ph il lip s pan-he a d s crew s at th e
front of th e bott om p an el.
F i g u re 3.15 Remo val of saf et y ch eck val ve gu ard
6. Rem ov e (7) Ph ill ips pa n- he ad scre ws on th e outsid e of th e botto m pan el.
7. Gentl y rem ov e the bottom pa n el.
8. Remove the thre e visib l e o - ring s fro m the un der side o f the un it, p ar t nu mber 3001 8, 30023 and
04 35 8s ee fi g ur e 3.X.
9. Pull off the oxyge n d iffus er tube from th e nip pl e a nd rem ov e it from th e ch an ne l b as e, se e fig ure
3.15
F i g u re 3.16 Remo vi n g the O2 di ffuser tube
Installation
1. Carefu lly tur n t he un it up si de do wn.
2. Attach the curv ed porti o n of th e oxy g en diffus er tub e to th e n ip pl e a nd push into pl ac e. Plac e the
rema in in g porti on of the tu b e i nsi de the c ha n ne l b ase in th e un dersi de of th e unit.
3. Insert th e thr ee o-rin gs- int o th e und ersi d e of the u nit, n oti ng that e ach o-rin g h as a differ e nt sh ap e.
4. Ensure that a ll thre e o-r in gs are in pl ac e and positi on th e bot t om p an el over the thr ee sc re w hol es
at the front.
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42 Vela Ventilator s
5. Instal l (7) P hi lli ps p an h ea d screws on the bo ttom pa n el.
6. If the left p an el is inst al le d, in s t all (3) Ph il li ps pa n-he ad sc re ws o n th e left sid e of th e botto m pa ne l,
an d if the front pa ne l is i nst all ed, i nstall ( 2) Phil li ps p a n-h ea d screws at the front of th e bot t om
pa ne l.
7. Install (4) r ubber feet.
8. Instal l the saf ety check va lv e gu ard with (2) Philli ps c ou nter sink s cre ws.
9. With the unit upright, install the battery tra y, top c ov er, an d po wer c a bl e.
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Service Manual Disassembly & Reassembly Pr ocedures 43
Oxygen Sensor part number 15972
For early model Vela units do the following:
Removal
1. Rem ov e th e po wer cab le, to p cover, battery tr ay, left pa ne l, an d bottom pa ne l.
2. Turn th e unit o n its si de.
3. Rem ov e th e 1” mou nti ng nut f r om the ma nif o ld b as e (se e fi g ure 3.14) a nd p ull t he s en sor fr om the
manifold.
Note
To rem ov e the O2 sens or only wh en c om pl ete di sassembl y is n ot req uir e d, simp ly gr as p the s en sor in
pl ace an d unsc rew fro m the r e tain in g nut l eavin g the nut i n p l ace in th e bas e .
Installation
1. Ensure the o-ring is in stalle d i nto th e ox yg en sen or.
2. With the unit on its si de, pl ac e the s e nsor in to the m an ifo ld and install the 1” mo u ntin g n u t.
3. Install the bottom panel, left panel, ba ttery tr ay, top cov er, an d pow er c ab l e.
For later model Vela units (usually 1400 series or later) do the following:
Removal
On the bottom rear of the V el a, un scre w th e EMI shi el d con t ainin g th e foa m amb ie nt a ir filter an d lift out
the s hi el d a nd filter to g eth er.
The O2 se nsor is visi bl e on th e left . Usi n g nee dl e n os e pl ie rs, disc on n ect the O 2 filter c o n nect or. Pu ll
firmly straight back on th e O2 sensor to remove.
Installation
Seat th e ne w O2 filter an d r e -con n ect.
Repl ac e the E MI shi el d containi n g the f oam amb ie nt a ir filte r and re- attac h the scr ews sec uri ng it i n
pl ace.
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44 Vela Ventilator s
Rear Panel part number 15892
Removal
1. Rem ov e th e po wer cab le, to p cover, battery tray, right p a ne l , and left p an el .
2. With the unit upri ght, disc on n ect the f oll o wi n g from the tur bi ne m otor driver PCB:
P2 10-pi n to mai n P CB and po wer PCB via m ai n h arn e ss
3. Cut the two ti e wraps that hol d the ma in ha rn ess a n d the tie wrap th at ho ld s the ble nd er c a bl e to
the tur bi ne.
4. Turn th e unit o n its si de.
5. Rem ov e (3) Ph ill ips pa n- he ad scre ws on th e rear pa ne l.
6. Sli de th e fiber optic cabl e fro m unde r the tur bi ne m uffler as sem bly.
7. Rem ov e th e rear pan el fr om the man ifo ld ba se.
Installation
1. Carefu lly pl ace the unit on its side a nd run th e fib er o ptic c a bl e und er the muffler t ub es.
2. Direct the bl en der ni pp le on the rear pa n el t hro ug h the hol e in t he m an ifo l d b ase.
3. Instal l (3) P hi ll i ps pan-h ea d s crew s o n the r ear pa ne l, ens uri ng th at th e ble nd er n ip pl e is cent ered.
4. With the unit upri ght, i nstall th e ble nd er ca bl e tie wrap to th e turbin e, and i nstall th e tw o tie wr aps
th at hold the ma in harness on to th e tie mounts, n ot in g tha t th e tie wra p s ar e position ed wh er e the
wires all run parallel.
5. Conn ect the fol lowin g to t he tu rbi ne m otor dri ver PCB:
P2 10-pi n from main P CB and pow er PC B via m ai n h ar ness
6. In stal l the le ft pa ne l, rig ht panel, ba tte ry tra y, top cove r, and p o wer ca ble.
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Service Manual Disassembly & Reassembly Pr ocedures 45
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46 Vela Ventilator s
F i g u re 3.17 Rea r Panel vi ew s
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Service Manual Disassembly & Reassembly Pr ocedures 47
Turbine and Muffler Assembly
Removal
1. Rem ov e th e po wer cab le,
top c over, battery tray, rig ht
pa ne l, le ft pane l, an d
bl en der.
2. If th e front panel is in stal led,
disc o nn ect th e cable from
J701 on the main PCB,
disc o nn ect th e gre en
oxyg en nebu lize r tube , an d
disc o nn ect th e blen der
cable.
3. If instal le d, us e a 3/4"
wrenc h to rem ove the hi gh
an d l ow pres su re oxyg en
fittings from the rear of the
un it, noti n g tha t the hi g h
pressure fitting is located
ab ov e the low pressure
fitting (see figure 3.18).
F i g u re 3.18 T urb in e & Muffle r ass embl y
4. Rem ov e (5) Ph ill ips pa n- he ad scre ws.
5. Disc on n ect th e gray s ili co ne i ntake a nd outp ut
el bo ws by g ently p ull in g them out from the m uffler
tubes.
6. Lift the assem b ly off the ma nif ol d b ase.
7. Gentl y p ull up the el bo ws to re move.
Installation
1. Insert the elbows int o the manifold base.
2. Set the turb in e an d muffl er as sem bly onto the
manifold.
3. Instal l (5) P hi lli ps p an-h ea d s crew s.
F i g u re 3.19 Hig h & low p ressure
O2 fittings on b ack p an el
4. If remov ed duri ng th is pr oc ed ure, use a 3/4 " wrenc h to i nstall th e hig h a nd low pres sure oxygen
fitting s to the rear of the un it, noti n g that th e hi gh pres sure f itting is l oc ate d above t he lo w pressure
fitting.
5. Conn ect the gray si lic on e i nta ke a nd output el bo ws by inse rting them int o the muffler t ub es. Push
once i n th e ce n t er of each el b ow to prop erly seat.
6. If th e front panel is in stal led, conn ect the cable to J701 on the main PCB, co nn ect the gr ee n
oxyge n n eb ul iz er tub e, a nd c o nn ect the ble n der c ab le.
7. Instal l the ble n der, l eft pa n el, rig ht pa n el, bat t ery tray, to p cover, an d pow er ca bl e.
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48 Vela Ventilator s
Over Pressure Relief Valve assembly
F i g u re 3.20 O ve r Pre ssu r e Relief Val ve ass embl y w i th o -ring
Removal
1. Rem ov e th e po wer cab le, to p cover, battery tr ay, right p a ne l , left pa ne l, an d front pa ne l.
2. Use a flat scre wdr iver t o pry t he v alv e from its location at the front left side of the manifold base.
3. Rem ov e th e o-ri ng (P/N 089 63 ).
4. Using a flat screwdriver in th e middl e sl ot, unscre w the ad ju ster in t he m id dl e of th e va lve and
remo ve th e tw o o-ri n gs (P/N 30 00 5 i n th e relief v alv e po pp et an d P/N 30 0 17 on th e bras s ad just er).
Installation
1. Instal l the two o-rings ( P/N 3 0 00 5 i n the r el ie f valv e pop pet an d P/N 30 01 7 on the brass a dj uster).
2. Sli de th e ho usi ng over the po pp et and scre w clockwis e i nto the h o usi ng, ti g hte ni ng with a flat
scre wdr iver.
3. Sli de th e valv e into pl ac e in t h e ma nif ol d b as e, en surin g th a t the adj ustme nt scre w is i n t he notc h.
CAUTION
Do not a dj ust the scre w in t he reli ef va lve, s i nce it must be f actory c al ibr ated.
4. Push u ntil th e valv e is s e ated into pl ace.
5. Instal l the front pane l, left p an el, right p a ne l, batter y tray, to p cov er, and p ow er ca bl e.
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Service Manual Disassembly & Reassembly Pr ocedures 49
Turbine Motor Driver PCB part number 71597
Removal
1. Rem ov e th e po wer cab le, to p cover, battery tr ay, right p a ne l .
2. Disc on n ect th e foll owin g from the tur bi ne motor dri ver P CB:
P1 8-pin to the tur bi n e
P2 10-pi n to J6 o n th e po wer P CB
3. Rem ov e th e (2) keps scr e ws.
4. Lift off the PCB .
Note
Do not remove t he turbine from t he turbine muffler assembly. They are supplied complete.
Installation
1. Posit io n th e tur bi ne m otor driver PCB on the rig ht sid e of th e turbin e assembly, on to p of the filt er
ho ld er, with th e board tow ard the turbi n e.
2. Instal l (2) k eps screw s.
3. Conn ect the fol lowin g to t he tu rbi ne m otor dri ver PCB:
P1 8-pin from th e turbin e
P2 10-pi n from J6 on the po wer PCB
4. Instal l the rig ht pa ne l, battery tr ay, top cov er, an d pow er c ab l e.
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50 Vela Ventilator s
Muffler/Filter Assembli es part number 10364
Removal
1. Rem ov e th e po wer cab le, to p cover,
battery tray, and left panel.
2. Rem ov e (6) Ph ill ips pa n- he ad scre ws on
the filter co ver.
Figure 3.21
3. Rem ov e th e cover an d the two o-r in gs (P/ N
30 02 0).
Figure 3.22
O-rings P/N 30 02 0
4. Use needle -nosed pl ie rs to pull ou t bo th the le ft
an d right filter assembli es. The rig ht as sem bl y
has t he fi lter s o ck
Figure 3.23
Installation
1. Insert the muffler (out put) into the left tube (see
picture) an d the soc k filter ( in put) i nto th e rig ht tub e.
The rig ht an d l eft muffler/fi lter asse mbli es ar e so ld
to ge ther a s par t n um ber 10365 .
2. Install tw o o-rings (P/N 30 0 20).
3. Install the cover usin g (6) Philli ps pa n-he ad
screws.
4. Install the left panel, b attery tray, top c ov e r, and
po wer c a bl e.
Figure 3.24
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Service Manual Disassembly & Reassembly Pr ocedures 51
Blender Assembly Part Number 15895
Removal
1. Rem ov e th e po wer cab le, to p cover, battery tr ay, a nd ri g ht p an el.
2. If the rea r p an e l is i nstall ed, remove the hi gh an d l ow pres su re oxyg en fittin gs from the r ea r pane l
using a 3/4" wr ench, noti ng th at the hi gh pressur e fittin g is l ocated ab ov e the lo w pressur e fittin g.
3. If the rea r p an e l is i nstall ed, d i sconn ect the 40-p in ri b bo n c a bl e from the SVGA o ut PCB.
4. If th e front panel is in stal led, d iscon ne ct the g r ee n oxyg en ne bu lize r tub e.
5. Disc on n ect th e foll owin g from the b le n der P C B:
J3 01 , 12 -pin conn ecto r to J 3 01 on th e mai n
PCB
6. Rem ov e th e bo ttom strip ambi ent a ir i nl et filte r
by pin c hi ng and pulling it ou t.
F i g u re 3.25 Amb i ent air filter
7. Rem ov e (3) Ph ill ips pa n- he ad scre ws on th e rig ht sid e of th e rear pa n el.
8. Use ne e dl e-n o sed pl iers t o di sconn ect the oxygen diffus er t ub e as y o u remove the bl en der
assembly.
9. If the ex ha latio n valve assem bly is in stalle d, disc o nn ect th e foll owin g from t he FIO2 P CB:
J3 2- pin (b lu e conn.) to o xyg en in le t so le no id on blen de r a s se mbly
J4 2-pin (red c o nn .) to ne b uli zer s ol en oi d assem bl y on up per r e ar of bl en der
Installation
1. If the ex ha latio n valve assem bly is in stalle d, conn ect the f oll owin g to the FIO2 PCB:
J3 2-pin ( bl ue c o n n.) from oxyg en inl et sol e no id on bl en der assem bly
J4 2-pin (red c o nn .) from n eb ul ize r sol en oi d a ssembly on up p er rear of bl e nd er
2. Posit io n th e blen der assem bl y ins id e th e uni t.
3. Use needle -nosed pl ie rs to fee d the oxygen d iffu se r tub e thro ug h th e ho le in the rea r panel and
co nnect it to the b l en de r nipple .
4. Instal l (3) P hi ll i ps pan-h ea d s crew s o n the r i ght si d e of th e rear pa n el.
5. Instal l the botto m strip ambient a ir inle t filte r .
6. Conn ect the fol lowin g to t he bl en der PCB:
30 1 12-pi n from J3 01 o n the m ai n PC B
7. If th e front panel is in stal led, conn ect the gr ee n oxyg en nebu lize r tube.
8. If the rea r p an e l is i nstall ed, c o nn ect the 40-p i n ribb on c ab le to the S VGA o ut PCB.
9. If the rea r p an e l is i nstall ed, i n stall t he hi gh a nd lo w pressur e oxy g en fitting s to the rear pa ne l us in g
a 3/4 " wren ch, notin g that th e hi gh pres sure f itting is l oc ate d above t he lo w pressure fittin g .
10. Instal l the rig ht pa ne l, battery tr ay, top cov er, an d pow er c ab l e.
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52 Vela Ventilator s
Figure 3 . 26 Bl ende r Assem bly
L1534 Revision B December 2004
Service Manual Disassembly & Reassembly Pr ocedures 53
Fan Assembly part number 15500
Fan
EMI Shield Filter h ol d er Filter Filter Grid
Figure 3 . 27 Fa n Assembly blo w ou t
Removal
1. Rem ov e th e po wer cab le, to p cover, an d batt ery tray.
2. Use a 5/16 ” nu t driver t o rem o ve th e insi de n uts a nd a sh ort (# 2) Philli ps sc rew driv er to r e move the
(4) Ph ill ip s pa n-h ea d outsi d e screw s on the fan a ssembly.
3. Rem ov e th e fan and E SD shi el d from th e i n side of th e unit, and the fi lter g r id fro m the r ea r of the
unit.
4. Disc on n ect th e fan ca bl e fro m J2 o n the po w er PCB.
Installation
1. Plac e the fan filter i nsi de the e xtern al fa n cov er. Ali gn with 4 attac hm ent h ol es, and ho ld it aga in st
the rear pa ne l.
2. Hold th e ES D shiel d to th e i n side of th e rear pane l wit h th e copp er co ntact strips touc hi ng the re ar
pa ne l.
3. Plac e the fan onto th e ES D sh iel d with the label to the in side of the unit and the wire at the bottom.
4. Use a 5/16 ” nu t driver t o in stall the nuts fro m the i nsi d e a nd a sh ort (# 2) Ph ill ips s cre wdriv er to
inst all the (4) Phil li ps p a n-h ea d machi n e screws onto th e fan asse mbly from the outsi de.
5. Conn ect the fan ca bl e to J2 o n the po w er PCB.
6. Instal l the batte ry tray, top c ov er, an d po wer cable.
L1534 Revision B December 2004
54 Vela Ventilator s
L1534 Revision B December 2004
Chapter 4 Operational Verification and
Calibration
Operational Verification Testing
Prior to usin g the V el a venti la t or on a new p atie nt the fol lo win g checks sh ou ld be c arri e d out to e ns ure
optimum performance. V erification testing should always be performed “off patient”.
WARNING
Disc on n ect pat ie nt from the ventilat or b efor e performing v er ificat ion testing.
Note
All personnel pe rforming prevent ive maintenance and product rep air must be trained and certified by VIASYS
Healthcare to service the product
Note
If any portion of the following performance check fails, and you are unable to correct the problem, contact your
VIASYS Healthcare Certified Service Technician.
First perform the User Verification T ests (UVTs) . To access the UVTs, do the following’
1. After di scon ne ctin g the patie n t, turn the venti lator OFF (i.e., STAND BY).
2. Press an d hol d the Acce pt button.
3. While hol di ng the Accept button, turn th e ve ntilator ON. Co ntinu e to h ol d the butto n unti l the
vent il ator complete s the P o wer On Se lf Tests (POST).
4. Rel e as e the Acce pt b utto n whe n th e UVT men u a pp e ars in the scr ee n. The Aud ib le Al ar m
soun ds. Pres s Alarm Reset b utton t o cl ear.
F i g u re 4.1 UVT Startup Screen
5. Press t he Patient Removed touc h scr ee n icon, the UVT test sel ecti on scree n disp la ys (s ee
figur e 4.2).
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56 Vela Ventilator s
F i g u re 4 2 Th e UVT Screen with the Main screen in Serv i c e mod e
6. Press t he ap pr opriat e tou ch screen ic o n to b eg in a test.
Lamp Test
Run thi s test to chec k the fr on t lamp s to ma k e sur e th ey ar e function in g prop erly.
1. Press t he LampTest to uc h sc reen ic on to start the test. The ve ntilator ill u min ates al l fron t pan el
LED s.
2. Press t he LampTest to uc h sc reen ic on ag ai n to tur n the LEDs off and exit the test.
Switch Test
Run thi s test to chec k the fr on t pan el m em br an e sw itch es to mak e s ure th ey ar e worki n g pro pe r ly.
1. Press t he SWI T CH TEST icon.
2. Press each me mbra n e sw itch contr ol i n turn. Watch for t he n ame of the c o n t rol to a p pe ar i n the
mess ag e bar a t the bottom lef t of the touch s creen a s follo w s:
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Service Manual Chapter 4 O p er ational Tes t in g and Calibrati o n 57
3. Press t he SWI T CH TEST icon again to exit t he test.
Alarm Test
Run thi s test to chec k the au di bl e alarm.
1. Press t he Al ar m Te st touch screen icon to st art the te st. The aud ib le al ar m soun ds.
2. Press t he Al ar m Te st tou ch screen ic o n a ga i n to sile nc e the audi bl e alarm an d ex it the t es t.
Filter Test
Run thi s test to chec k the diffe renti al pressur e acr oss th e turbi ne inl et filt er. A high d ifferen t ial pres sure
may i nd ic ate a dirty or occlu de d filter.
1. Press t he Filter Test t ouch sc reen ic on. Th e turbi ne accel e rates fl ow t o 1 4 0 lp m and c he c ks the
differ entia l pre ssur e to ma ke sure it is withi n ran ge. At the en d of the test, the ve nti lat or displ ays
a pass or fail m ess ag e. If the test p ass es, the foll owin g me s sag e ap pe ars:
x.x Passed
where x.x is th e av erag e turbi ne differ entia l pressure a n d P ind ic ates the t est pass ed.
If the test fails, the fo ll owin g mess ag e app e ar s:
x.x Failed
where x.x is th e av erag e turbi ne differ entia l pressure a n d F indic ates the t est fai le d:
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58 Vela Ventilator s
2. If the test fails, check the rotat i on of the turb ine inlet filter to make sure that the seam is
horizonta lly ori ented an d run t he te st ag ai n. If the te st fai ls aga in, contact a Bird Certif ie d Servic e
Technician.
Leak T est
Note
This test should be performed with all circuit accessories install ed (e.g., humidifier, water t r aps, and so on.)
Make sure al co nnections are secure and all ope nings occluded before beginning the test.
Run this test to make sure the patient breath i ng c ircuit is n ot lea ki ng.
1. Attach a one-lit er test l un g (P/ N 3 37 54) at th e patie nt breathi ng c ircuit wy e.
2. Press t he Leak Test to uc h scr ee n icon to ru n the test. Th e test b eg ins by increas in g th e
pres sure i n th e pati ent breath i ng c ircuit to 6 0 cmH 2O. The ventilat or th en d isp lays the f oll owin g
mess ag es in s eq ue nc e:
Le ak te st re quested
Le ak test i n pr ogress
3. The ventilat or the n w aits 10 s eco n ds and m easur es th e cir cuit pr essur e a ga in. If the differenc e
bet ween th e sta r ting and ending me asur em en ts is le ss than or e qual to 6 cmH2 O, the te st
passes an d the venti lat or disp l ays th e fol lo wi ng m ess ag e:
xx.x Pass ed
where x x.x is t he en di ng m e a sureme nt.
4. Otherwise, if th e diff erenc e is more tha n 6 c mH2O, th e test fails an d the ventilat or disp la ys the
followin g mess ag e:
xx.x Failed
5. If the test fai ls, check a ll con n ecti ons t o mak e sur e th ere ar e no le aks an d repeat the test.
6. It the test fai ls ag ai n, refer to Chapter 5, for tr ou bl es ho oti ng proc ed ur es
Exit
To exit the UV Ts press t he EXIT touc h screen ico n.
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Service Manual Chapter 4 O p er ational Tes t in g and Calibrati o n 59
Extended Functions
The Ext en d ed Functio ns me n u may be acce ssed via the U VT Test Sel ect scree n as d es crib ed in th e
prev io us s ecti o n. Pres s the E XTENDED FUNCTIONS icon from the UVT scre en.
Figure 4. 3 Ac ces si ng the E xte nde d Functions Sc re en from the UVT menu
You ca n also a ccess t he exte nd ed funct io ns scre en v ia the Scre en s me nu durin g norm al op eratio n.
Press t he scre en displ ay are a on the top ce n t er of the t ouch scree n to activ ate Scre en S el ect menu.
Figure 4 . 4 Ac ces si ng the E xte nde d Functions s creen from the Sc re en Se le ct me nu
Press t he EXT ENDED FU NCTIONS touch screen ic o n to d i splay the Extend ed F unct io n s scre en.
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60 Vela Ventilator s
Figure 4 . 1 Ex te nde d Functi ons s creen me nu
Events
To access the Events list, press th e Events scre en icon
F i g u re 4.2 Press the Events to u ch screen ico n
A list of chronolog ical even ts disp la ys with the la te st ev en t at the to p as sho w n in figu re 4. 11
F i g u re 4.3 T he Events scre en
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Service Manual Chapter 4 O p er ational Tes t in g and Calibrati o n 61
Transducer Data
Press t he Tran sdu cer Data screen ic on.
F i g u re 4.4 Press the Transdu cer Data scr een ico n
Th e Tran sd ucer Se le ction scre en displays.
F i g u re 4.5 Transdu cer data selectio n scr e en
From h ere y o u can s et the an al og data disp l ay as sociat ed with ea ch trans ducer. For exa mpl e, if you
pres s the SET ANALOG 0 scree n icon as s h own i n figure 4. X, the follo wi n g opti on s di sp la y in a drop
do wn m e nu.
Exhl Flow Diff Press
Exha la tion Flow
Turbine Flow
Tu rb ine Speed
Figure 4 . 6 Tra n sduc er da ta s el ect ion opti ons
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62 Vela Ventilator s
In this examp le , the transd uc e r asso ci ated with An al og 0 is set to d isp la y Turbin e Spe ed.
Set e ach an al o g valu e to on e of the tra ns du c ers i n the dr op do wn m e nu. Pr ess EXIT to r e turn to th e
Extend ed F unction s scree n.
For instructi o n s on ho w to vie w this data as a disp laye d wa veform, see Chapter 5, M ai nte na nc e &
Trou bl esho oti n g.
Transducer Tests
To access th e t r ansd ucer t est scre en pres s the Tr ansd ucer Tests scre e n ic on.
F i g u re 4.7 Press transdu ce r tests ico n
The tra ns du cer tests scre en a pp ears wit h ic o ns for th e Tur bi ne Differ entia l, Exhal atio n D iffere nti al a n d
Circuit Pr essur e tran sd uc ers.
F i g u re 4.8 Transdu cer test scre en
Press t he Turbi ne Differ entia l (TURB DIFF) s creen ic o n.
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Service Manual Chapter 4 O p er ational Tes t in g and Calibrati o n 63
Figure 4 9 Press TURB DIFF icon
The foll owin g mess ag es ap p ear i n s eq ue nc e in t he m ess a ge area at th e botto m left of the to uc h
screen.
Turb Diff Pressure Xdcr T est – Requested
Turb Diff Pressure Xdcr T est – In Progess
Turb Diff: XXX Passed ( wh ere X XX is th e trans du cer r ea di ng within ran ge)
Or
Turb Diff: XXX Failed (wh ere X XX is th e trans du cer r ea di ng O UT of rang e)
Press t he Exh a lati on Differ e nti al Pr essure (E XHL DIFF) screen icon.
The foll owin g mess ag es ap p ear i n s eq ue nc e in t he m ess a ge area at th e botto m left of the to uc h
screen.
Exhl Diff Pressure Xdcr T est – Requested
Exhl Diff Pressure Xdcr T est – In Progess
Exhl Diff: XXX Passed (wher e XXX is the transduc er reading within range)
Or
Exhl Diff: XXX Failed (wh ere X XX is th e trans du cer r ea di ng O UT of rang e)
Press t he Circ uit Pr essure (CIRC PRESS) s creen ic on.
The foll owin g mess ag es ap p ear i n s eq ue nc e in t he m ess a ge area at th e botto m left of the to uc h
screen.
Circ Pressure Xdcr Test – Requested
Circ Pressure Xdcr Test – In Progess
Circ Press: XXX Passed (wher e XXX is the transduc er reading within range)
Or
Circ Press: XXX Failed (w h ere X XX is th e trans du cer r ea di ng O UT of rang e)
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64 Vela Ventilator s
Version Information
To access th e softw are v ersi o n inf orm ation screen, press t h e VERSION INFO screen icon .
F i g u re 4.10 Press th e Versio n Info icon
The Versi o ns s creen, sh o wi ng the ver si ons of all s oftwa r e i n stall e d on the machi ne, d is pl ays.
Note
The version information shown in figure 4.X is an exampl e only. Your machine will have different versions of
software depending on the date of sale and the updates loaded.
Figure 4 1 1 Sa mple Ve rs ion informa tion s cree n
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Service Manual Chapter 4 O p er ational Tes t in g and Calibrati o n 65
Date & Time
The date an d time can be s et an d the ve ntilat or hours of us e (Ho ur Met er) can be v ie we d b y pres si ng
the D ate/Ti me scre en ico n.
F i g u re 4.12 Press D ate/T ime ico n
F i g u re 4.13 Date/Time and Ho u r Meter sc reen
To adju st the d ate a n d time, s el ect by pres si ng th e touc h sc reen d irect ly ov er the c o ntrol to b e a dj usted
(see fig ure 4.X) .
F i g u re 4.14 Select the mon th co n tro l
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66 Vela Ventilator s
Adjust by turn i ng th e Data Di al cl ockwis e to incr ea se, or c o unter cl ockwis e to decr ease, the v al ue.
F i g u re 4.15 Data Dial
FiO2 Calibration
See t he Cali br ation secti on of this Cha pter.
Ventilator Setup
To access th e vent il ator setu p opti on s, pre ss the V ent S etu p scree n ico n.
F i g u re 4.16 Press Ven t Setu p ico n
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Service Manual Chapter 4 O p er ational Tes t in g and Calibrati o n 67
F i g u re 4.17 Ven tilator Setu p Screen
Low Min Volume Off
Ther e are two r an ge s p ossibl e for the L o w Minute Vo lu me A l arm. The y ar e OFF to 99.9 lit ers a nd 0.1
to 99.9 liters. The L o w Min Vol Off Dis ab le/ Enabl e scr e en icon, allo ws y o u to togg le between the tw o
ra ng es.
F i g u re 4.18 L ow Min Vol Off Enabled
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68 Vela Ventilator s
Locks Disabled
Toggles the control Locks on and off.
F i g u re 4.19 L ocks Enable/Disab le
FiO2 Monitor Disabled
Disab les or E n ab les t he FiO 2 Monitor F unct i on.
F i g u re 4.20 Mon i to r en able/d isab le
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Service Manual Chapter 4 O p er ational Tes t in g and Calibrati o n 69
Altitude Adjustment
All ows for a dj u stment of altitu de in fe et or m eters ab ov e se a leve l.
F i g u re 4.21 Al titu d e feet/meters
The Altitude s c r ee n icon tog gl es betw ee n Fe et an d Meters
an d the se lect i on is refl ecte d i n the co ntrol la be l (se e figur e
4.22)
Figure 4 . 22 Al tutude i n Me te rs
To adju st the v al ue, s el ect the control,
then adjust using the data dial.
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70 Vela Ventilator s
Language Selection
A choic e of 5 lan gu a ges is av ail a bl e (se e figure 4.23). Se le ct a lang u ag e by pr essin g th e appropri ate
scre en ico n. P r ess EXIT to l e ave t he V entil a t or Setup scre e n a nd retur n to the Ext en de d F unct io ns
screen
Figure 4 . 23 Ex it Ventilator Setup
Press E XIT ag ai n to ex it the Speci al Fu nctions me nu
F i g u re 4.24 Exit Special Fu nction s
The ventilat or wil l b eg in op er ation at prev io usly sel ect ed s ettings.
Set u p th e pati ent a n d ventilat or operati on al settin gs per the instructio ns y our Operator’s Manu al.
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Service Manual Chapter 4 O p er ational Tes t in g and Calibrati o n 71
Verification tests
1. Befor e attach in g the V el a to a ne w pati ent, pe r form th e fol lo win g Operati on al v erific ati on c hecks.
2. Turn on the Ve la, choose New Patient and Accept. This w ill retur n al l sett ings to the defaults.
3. To check mon itor p erform a nce, allow the ventilator to o p erat e for tw o mi nutes. Vie w th e
monitore d pa rame te rs. The values should app ea r a s fo llows:
Parameter Value
Minute volume 6 L+ 1.2 L
Tidal Volume 500 ml + 100 ml
I:E Ratio 1:6.1 + 10%
Breath Rate 12 bpm + 2 bpm
PIP Should equal m anometer display + 5 cmH2O
MAP N/A
PEEP 5 cmH2O + 2 c mH2O
Inspiratory Time 0.68 seconds + . 05 seconds
3. Check the alar ms as foll ows:
a. Power Fai l Che ck
i. Rem ov e th e po wer cord fr om the wall. Th e ve ntilator sho ul d do th e foll owin g:
1. Switch to battery power.
2. Soun d th e aud i bl e alarm.
3. Turn th e AC P ow er So urce i n dicator OFF.
4. Displ ay the BA TTERY ON me ssage in th e al arm win do w.
5. LED for int ernal batt ery w ill li ght.
ii. Press t he A lar m Reset b utto n to clear the alarm.
iii. Plug the AC power c ord back into the w al l socket.
b. High Pressure Limit Ch eck
i. Lo wer t he H ig h Press ure A lar m settin g to 5 cmH2O be lo w the P ea k Ins pir atory
Pressur e (PIP). When t he ventilat or cycles to inspiration and the high pr essure
limit i s vi ol ated, the h ig h pr essure al arm sho u ld occur. W he n this hap p ens t he
vent il ator sho ul d:
6. Immed iat ely c y cle into the expirator y p hase.
7. Soun d th e aud i bl e alarm.
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72 Vela Ventilator s
8. Displ ay the HI GH PRES mes sag e i n th e ala r m wi nd ow.
ii. Return th e Hig h Pre ssur e Al a r m settin g to 5 cmH 2O above PIP, an d press the
Alarm Reset b utton t o cl ear t he al arm.
This complet es the performan ce ch eck. Th e followin g Ventil ator P erform a n ce Che cklist may be use d to
document each Performance Ch eck for your records.
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Service Manual Chapter 4 O p er ational Tes t in g and Calibrati o n 73
Vela Ventilator Performance Checklist
This checkli st i s for us e duri n g the Vel a Op e r ation al V erifi c atio n Proc ed ur e.
Seria l Number __ ______ _____ __ Ho ur s_ _____ ________ Da te __ _____ _____ _
Verification Steps:
Verification Ste p Check & I n itial
1. Insp ect the ve n t ilator a nd c om po ne nts for ap pe aranc e a nd clean li ne ss.
Confirm th e Ex ha latio n valve, di ap hragm, an d air int ake fi lte r and test lun g s
are c orr ectly in stall e d. Wipe the ventil ator clea n if n ee d ed using a cloth
moiste ned with a n app ro ved clea ning solu tion .
2. Enter the U ser Verifi catio n Test (UVT). Press the P atie nt Remove d touch
screen icon.
3. Test the al arm volum e. Adj us t as req uir e d.
4. Conf irm the p r op er fun ctio n ing o f the front pa ne l lamps and L EDs.
5. Confirm th e prop er fu nction in g of the me mbran e sw itch es.
6. Complete t he internal filte r performan ce check.
7. Check the pati ent bre athi n g circuit on t he v e ntilator an d co nd uct a le ak te st.
Make sure all need ed component s ar e firmly atta ch ed in th e circuit.
8. Exit the UVT and c on d uct per f orma nc e test.
Set the p aram eters to t he fo ll owin g rec ommen de d settings:
Mode
A/C
Inspiratory Pause
OFF
Tidal Volu me 50 0ml
Sigh
OFF
Peak Flow
60 lpm Square Waveform
OFF
Breath Rate
12 bpm
Bias Flow
10 lpm
PEEP/CPAP
5 cmH2O
Altit ude
Curr ent
Sensitivity
OFF
Inspiratory Time 0.3 s ec
Pressure Support
OFF
Terminat ion Se nsitivit y
25 %
Pressure Contr o l
OFF
Variable Time Terminati on
3.0 s ec
% O2 21
Flow Ter m inat ion
OFF
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74 Vela Ventilator s
Set the var ia bl e al arm control s as follo ws:
Alarm Co nt ro l Sett ing
High Pressure PIP plus 5 cm H2O
Low Pressur e PIP minus 10 c mH2O
Lo w Mi nute Vo lum e 4 Lit ers
High Breath Rate 16 bpm
Apnea Interval 20 secs
Verification Ste p Check & I n itial
9. After at least two min utes of op eratio n co m pare the disp la yed r ea di n gs to the
following:
Display Reading
Minute V ol um e 6L +/- 1.2 L
Tida l Vo lume 50 0ml +/-100ml
I:E Rati o 1:6.1 +/-1 0 %
Breath Rate 12 bpm +/-2 bpm
PIP Equa l to Manome t er +/- 5
MAP NA
PEEP 5 cmH2O +/-2 cmH20
Inspirat ory Tim e 0.68 sec +/-0. 5 sec
Verification Ste p Check & I n itial
10. Ch eck alar ms
A. Power Fail Check
B. High Pressure Limit Check
Signatur e: _____________________________________________________
Procedure Complete
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Service Manual Chapter 4 O p er ational Tes t in g and Calibrati o n 75
Calibration
Note
All personnel pe rforming prevent ive maintenance and product rep air must be trained and certified by VIASYS
Healthcare to service the product
Test Set-up
Figure 4.34 Callibration setup #1
To c ali bration por t
To pr es s ure mano meter
(0 to 60cmH2O)
High press ure g as
s ourc e (wall or bot tled)
with 0-50 ps ig re g ulat or
attac h ed
To c ali bration por t
To pr es s ure mano meter
O-60 ps ig
F i g u re4.35 Calibration setu p #2
Power Up Verification/Service Verificatio n Tests
1. Rem ov e th e top cov er and battery tra y a s described in Chap te r 3 .
2. Locate DIP Sw itch 1 on the M ai n PCB A o n the r ear of the f r ont p a ne l. Pla ce it i n the O N positi on,
as sh o wn i n fi g ure 3.
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76 Vela Ventilator s
11
PAL P/N 15532
TBIR D
TM
1995
BIRD C 1995
TURBINE EEPROM
S/N: XXXXXXXXXXXX
PT 500 PT 501
P1 P1 P2 P2
8
7
6
5
4
3
2
1
ON
3. Conn ect the Vel a to a prope r l y gro un d ed A C sourc e. Tur n on po wer t o th e unit.
F i g u re 4.36 Main PCB
P1 P2 P1 P2
Zer
o
Pea k
/ Conti nuou
s
5 lp m
O
2(%)/ N 2
180 lp m
Ai r
20 l p m
O
2 (%)/ N2O
Hi g h
Ra nge
GAS FLO W RATE
3 lite r s
O
2(%)/ N 2
3 lite r s
Ai r
M i nute
O
2(%)/ N 2O
Rat e
BPM
in s p ir at o r y
e xp irat o ry
I: E
Rat i o
Lo
wFl o
w Ran g
e
Hi g
hFlo
w Ran g
e
VOLUME RATE/TIME
Cl ean ,
dry gas
only 5
lp m max
.
Cl ean , d ry
gas onl
y180
lp m max
.
0
Res e
t
Ent e
r
F
2
F
1
4 ps i
max d i ffer e n ti
al
P-P
+
P-P
+
100 p s i
max di f f e r e nt i
al
Lo
w Pr e ssu r
e Ran g
e
Hi g
h Pr e ssu r
e Ran g
e
GAS PRESSURE
20
cmH2O
250
cmH2O
185 mm
Hg
20
psi
100
psi
5170
mmHg
Hi g h
Ra nge
Low
Ra nge
5 lp m
O
2 (%)/ N 2
5 lp m
Ai r
5 lp m
O
2 (%)/ N2O
Low
Ra nge
6 5 4
789
Ov e rran g
e
Mea su r e me
nt
Mod
e
Unde r r a ng
e
T
T
15
psi ma
x
100
psi ma
x
123
PRE SSU RE
MANOMET ER
P/ N 33903
Attach to the
t r a n sducer n eedi n g
ca li br atio n
Turbi ne
Di ffer ent i al
T r ansduc er
Ex hal at i on
Flow
T r ans duc er
Exhalation
Pressu re
Tr ans ducer
ON
1 234 5678
F i g u re 4.37 L ocation o f transd u cers
4. The ventilat or performs its Po wer On Se lf Te st. When the s elf-test i s com p lete, th e scr ee n disp lays
“fl at ” w aveform s an d the ve ntilator make s no attempt to d eli v er a b r e ath. Thi s in dicates t hat you are
in a “Serv ic e ” mode
5. The au di bl e al arm sh o ul d soun d, pr ess the al arm reset b ut t on to s il ence alarm.
6. Press t he MAI N ico n at the to p of the tou ch
screen
7. The SVT TEST SELE CT screen displ ays.
8. Press CALI BRATION to acc e ss the
trans du cer c al i bratio n scre e n (see fig ure 4.7)
F i g u re 4.38 SVT T est Select Screen
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Service Manual Chapter 4 O p er ational Tes t in g and Calibrati o n 77
F i g u re 4.39 Calibration selectio n screen
Exhalation Pressure Transducer
1. Press t he EXH PRESS XDCR touc h screen icon fr om the CALIBRATION SELECT Scr een. The
EXH L PRESS CALIB scre en displ ays s ho wi ng both pressu res as “Pe nd in g ” a nd with t he
instr ucti on “A p ply 0 cmH 2O a nd pres s b utto n ”.
F i g u re 4.40 Exh alation Pressu re T ransdu cer Calibration screen #1
2. Disc on n ect tu b in g from th e ex ha latio n pr essu re tra nsd uc er befor e conti nu in g wit h th e proc ed ure
(see fig ure 4.6 for loc ati on of the trans du cer s ).With no t ub in g attach ed to the exhal ati on p r essure
trans du cer, press the P RESS URE APPLIED touc h scree n i con for zer o c a librati on.
3. When the calibra t ion is co mple te , the screen le gend change s to read “App ly 60 cmH2 O, Press
Butto n ” a nd th e zer o pr essur e valu e now sa ys “OK ” wit h a n A/D v al ue ad de d.
F i g u re 4.41 Exh alation Pressu re T ransdu cer Calibration screen #2
5. Attach the cali brati o n set up s ho wn in fi gure 1 to the Exhal a tion Pr essur e Trans d ucer p ort (see
figur e 4 f or l oc atio n).
6. Turn th e cali br ation syr in ge h an dl e cl ockwis e to gen er ate p ositi ve pres sure.
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78 Vela Ventilator s
7. When the pres sure m a nometer reads 60 cmH2O +/- 0.6 c mH2O, pres s the P RESSURE APPLIED
touc h scr ee n icon.
F i g u re 4.42 Exh alation Pressu re T ransdu cer Calibration screen #3
8. When the calibration is c o m pleted, the scr een displays OK for both calibrat ions. SAVE
CALIBRATION and CA NCE L CALIBRATION. Press SAV E CALIBRATION to save and return to
the tra ns ducer calibr ati on s el e ction scree n.
CAUTION
Make sure that your pneumatic connection is to the Exhalation Pr essure transducer before applying 60 cmH2O
pressure. If the 60.0 cmH2O pre ssure is inad vertently applied to the Exhalation Differential (Flow) tr ansducer it
will perman ently damage the transducer.
Turbine Pressu re Transducer
1. From the CA LI BRATION SE LECT screen, pr ess TURB PRESS XDCR.
2. The first Turbi n e Pre ssur e c ali brati o n scree n displ ays s ho wi ng both ca li brat ion pressur es as
pe nd in g an d with the l e ge nd “App ly 0 c mH 2 O an d press b utton ”.
F i g u re 4.43 Tu rb in e Pressure Z ero calib ration screen # 1
2. Disc on n ect tu b in g from th e tra nsd uc er befor e conti n ui ng with the proce du r e. Se e fig ur e 4. 6 for
locati on of the t r ansd ucers
3. With no tu bi ng attac he d to th e turbi ne pr essu re tra nsd uc er, pres s the PRE SSURE APP LI ED touch
scre en ico n for zero c al ibr ati o n.
4. The scr ee n l e g en d cha ng es t o re ad “A p ply 6 0 cmH 2O, Press Butto n ” a n d the stat us of th e zer o
calibr ati on lin e no w read s “O K ” w ith a rec ord ed A/ D va lu e.
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Service Manual Chapter 4 O p er ational Tes t in g and Calibrati o n 79
F i g u re 4.44 Tu rb in e Pressure 60 cmH 2O calibration screen #2
5. Attach the cali brati o n set up s ho wn in fi gure 1 (av ai la bl e as a kit from VIA S YS Healt hc are) to the
port P2 o n th e turbin e pressur e tran sd uc er (s ee fi gure 4.6 for loc atio n).
6. Turn th e cali br ation syr in ge h an dl e cl ockwis e to gen er ate p ositi ve pres sure.
7. When the pres sure m a nometer reads 60 cmH2O +/- 0.6 c m H2O, press t he P RESSURE APPLIED
touc h scr ee n icon.
8. The scr ee n displ ays OK for b oth pr essur es an d SAVE CA LIBRATIO N an d CA NCE L
CALIBRATION. Press SAVE CALIBRATION to sav e a nd re turn to th e tra n sdu cer c al ibr ati on
selection s creen.
F i g u re 4.45 Tu rb in e Pressure 60 cmH 2O calibration screen #3
9. Reco nn ect tubi ng to the port a fter cal ibr ati on.
CAUTION
Make sure that your pneumatic connection is to the Turbine Differential transducer before applying 60 cmH2O
pressure. If the 60.0 cmH2O pre ssure is inad vertently app lied to t he Exhalation Differential (Flow) Transducer it
will be permanently damaged an d require replacement..
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80 Vela Ventilator s
Exhalation Flow Transducer Calibration
1. From the CA LI BRATION SE LECT screen, pr ess EX L FLOW XDCR. The first Exhalation
Differ entia l Pre ssur e (Flo w) cali br ation scr ee n disp lays.
F i g u re 4.46 Exh alation Differ en tial Pressu r e (Flo w ) screen #1
2. Disc on n ect tu b in g from th e tra nsd uc er befor e conti n ui ng with the proce du r e. Se e fig ur e 4. 6 for
locati on of the t r ansd ucers
3. With no tubing attache d to th e transducer, pr ess the PR ESSURE APP LIED tou ch scr e en ico n for
zero cal ibr ati on .
4. When th e ca li b r ation is c om pl ete, th e statu s of the z ero pr e ssur e li ne rea d s “OK ” an d an A/D valu e
is re co rded . The screen lege nd cha nges to re ad “A pp ly 3 cmH2 O, Press Button . ”
F i g u re 4.47 Exh alation Differ en tial Pressu r e (Flo w ) screen #2
5. Attach the cali brati o n set up s ho wn in fi gure 1 to the Exhal a tion Differ e ntial (Flow) Tr ansd ucer po rt
P2 (s ee fi gure 4.6 for l oc ati on ).
6. Turn th e cali br ation syr in ge h an dl e cl ockwis e to gen er ate p ositi ve pres sure.
7. When the pres sure m a nometer reads 3 cm H2O +/- 0.6 c m H2O, press t he P RESSURE APPLIED
touc h scr ee n icon.
8. When th e ca li b r ation is c om pl ete, th e statu s of the z ero pr e ssur e li ne rea d s “OK ” an d an A/D valu e
is rec orded. The screen displays SAVE CALI BRATION and CANCE L CA LI BRATION. Press SA VE
CALIBRATION to sav e a nd re turn to th e tra n sdu cer c al ibr ati on s el ecti on s c r ee n.
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Service Manual Chapter 4 O p er ational Tes t in g and Calibrati o n 81
F i g u re 4.48 Exh alation Differ en tial Pressu r e (Flo w ) screen #3
9. Rem ov e cali br ation setu p fro m exh al ati on di fferent ia l pressure (fl ow) tr ansducer port an d reco n nect
tubi n g b efor e c ontin ui ng.
Oxygen Pressu re Transducer Calibration
1. From th e CA LI BRATION SE L ECT scre e n, press O2 PRESS. The Oxyge n Pre ssur e Tra nsd uc er
Calibra t ion scre e n #1 appears.
F i g u re 4.49 O2 Pres sure c alibration scree n #1
2. With no tubing attac hed to the Vela, pr ess the PRE SSURE APPLIE D touch screen ic on for zer o
calibr ati on.
4. When th e ca li b r ation is c om pl ete, th e statu s of the z ero pr e ssur e li ne rea d s “OK ” an d an A/D valu e
is re co rded (see figu re 4. 19 ). Th e scre e n lege nd change s to rea d “A pp ly 50 cmH2 O, Press Button . ”
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82 Vela Ventilator s
F i g u re 4.50 O2 Pres sure c alibration scree n #2
5. Attach the cali brati o n set up tub e to th e
ne bu liz er port on th e fro nt of t he V el a (s ee
figur e 4.20 ).
6. Press t he N e b uli zer mem bra ne butto n on th e
front panel t o open the solenoid.
7. Apply gas from the hig h pr essure gas s o urce
at 50 psig pr es sure.
8. When th e pres sure m a no meter read s 50
psig, pr ess the PRESSURE APPLIED touch
screen icon.
9. When th e ca li b r ation is c om pl ete, th e statu s
of the 50 psi g pres sure li n e r ea ds “OK” and
an A/ D va lu e is record ed (s ee figur e
4.21).Th e screen displ ays S A VE CALIBRATIO N and
CANCE L CA LI BRATION. Press SA VE CALIBRATION to
save a nd retur n to th e transd ucer cal ibr ati on
selection scr een. Figure 4 . 51 Ne bulize r port on t h e Ve la
F i g u re 4.52 O2 Pres sure c alibration scree n #3
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Service Manual Chapter 4 O p er ational Tes t in g and Calibrati o n 83
Regulator calibration:
High press ure g as
s ourc e (wall or bot tled)
with 0-50 ps ig re g ulat or
attac h ed
Connec t to hig h
pres s ure in let on r ear
of Ve la
To Pre ssure
Manom eter 0-60 p si g
Meas ur e pres s ure at
Nebuliz er p ort o n Vela
Figure 4 . 53 Ca libration s et up f o r Re gulat or Calibration
1. Enter the SVT mode a s d etai l ed in th is pr oc e dure then pres s the MAI N ic o n. From th e
CALIBRATION SELE CT screen, press t he S O LENOI D tou c h scree n ic on to e nter th e so l en oi d
mode.
2. Conn ect g as sourc e to th e hi gh-pr essu re po rt on th e rear pan el (see fi g ur e 1 8). Usi n g a 0-50 psig
regul ator, ap pl y 50 psig g as pr essure. In tur n, press the O2-0, O2-1, and O2-2 s ol en oi d t ouch
screen icons.
3. Using a ca li brat ed m an om eter , meas ure t he pres sure at th e Ne bu liz er port on th e fro nt of t he
vent il ator for e ach s ol e no id (s ee fi gure 17). It must read 40 psig +/- 1. Ad ju st the in te rn al
ad justm e nt re g ul ator to achie v e the c orr ect pressure at the N eb ul izer port (see fi gure 4.22 )
High Pres s ure
O2 Port
F i g u re 4.54 Vela Rear Pan el
3. Perform the O perati on al V erif icatio n Proc e d ure descri be d i n this ch apter once the ca li br ation is
complete. .
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84 Vela Ventilator s
Note
All personnel pe rforming prevent ive maintenance and product rep air must be trained and certified by VIASYS
Healthcare to service the product
F i g u re 4.56 In tern al adju stmen t reg u l ator location
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Service Manual Chapter 4 O p er ational Tes t in g and Calibrati o n 85
Figure 4 . 57 Lo cat ion of O2 Ble nde r so le noids
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86 Vela Ventilator s
Oxygen Sensor Calibration
From th e Sp ecial Fu nction s men u, press the FIO2 MON CALIBRATIO N touch s cre en icon
Figure 4 . 58 Sp eci al Func ti on s me nu,
The foll owin g screen w il l a pp e ar.
Figure4. 59 FiO2 Se nsor Calibra tion Ambien t Ai r
Attach 10 0 % O 2 at 5 0p si g to the hi gh-pr essu re in let on th e r ear of the V el a.
Press t he STA RT AMB CA LI BRATION touch screen ic on. The machine w ill take 3-5 minutes to
perform the cal ibr ation and the fol lowing sc r een w ill appear whi le t he c ali bration is in progres s.
F i g u re 4.60 Amb i ent Calibration in p rogress.
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Service Manual Chapter 4 O p er ational Tes t in g and Calibrati o n 87
When cali brati on is com pl ete, the fol lo wi n g screen w il l a pp e ar sh owin g the ne w am bi e nt val ue.
F i g u re 4.61 Amb i ent calib ration co mplete show ing n ew va lu e
Press t he STA RT 100% CALI BRATION touch screen ic on. The cali br ation will t ake 3- 5 minutes during
which time the followin g scr ee n wi ll ap pe ar.
F i g u re 4.62 100 % F IO2 calibration in pro gres s
When th e ca li b r ation is c om pl ete the fo llowing screen will ap pe ar .
F i g u re 4.63 F IO2 calib ration co mplete, n ew v alu es sh o w ing.
If the calibr ati o n va lu es ar e ac cept ab le, pres s EXIT to exit th e ca li brati o n se qu en ce.
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88 Vela Ventilator s
L1534 Revision B December 2004
Chapter 5 Maintenance & Troubleshooting
Routine Maintenance Procedures
Replacing the software PCMCIA cards
Occasio na l sof t ware u pgrad e s may re q uir e r ep lac ement of the i nter na l PC MCIA card th at driv es th e
Vela. This i s e asi ly ac cess by remov in g th e scre ws hol di ng the ve nti lat or cover an d slid in g the c ov er off
tow ards t he re ar as s ho w n in figur e 5.1.
F i g u re 5.1 Slide co ve r to w ard s rear
CAUTION
The SVGA Outp ut ribbon cable lies directly bene ath the top cover assembly running from the front of the Vela to
the rear. It can be damaged if care is not taken when removing the cover. Make sure that the cover clears this
cable before slid ing it back.
The card is located towards the front of the Vela beneath the righ t p anel. To re pl ace the card, refer to
figur e 5.2 and do th e foll owin g:
Card ej ect b utto n
F i g u re 5.2 PCMCI A c ard s in p l ace
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90 Vela Ventilator s
Note
If a new version of software is installed, it can ta ke up to two minutes for the software to download to the
ventilator. During this time the ventilator is inope ra tive and the audible alarm will sound. The ventil ator will
resume normal operation once the download is complete.
1. Press t he protr ud in g b utto n ben eath the car d to e ject.
2. To instal l, mak e sur e th e arr o w on the car d i s pointin g u p th en push the ca rd int o th e
applicable slot until it clicks int o plac e.
WARNING
It is essent ial when working insid e the ventilator t o protect against static discharge , which can dam age the
ventilator and ca use it to become inoperative. AL WAYS take stan dard ESD preca utions before removing the
ventilator cover .
Replacing the externa l A/C fuses.
Rem ov e th e po wer cord prote ctive c ov er. Un pl ug th e
A/C power cord.
F i g u re 5.3 Remove the pow er co rd g u ard
Th e AC po wer modu le is a univer sa l mo du le fo r A/C
voltag es from 10 0-24 0 volts. Usi ng a flat bl a de d
scre wdr iver, pr y op en the c ov er. Usi n g the s ame
scre wdr iver, l o osen a n d p ull o ut the red fu se ho ld er as
show n in fi g ure 5.4.
Rem ov e th e fuses from both sides of the fus e h ol der
an d repl ac e wit h fus es P/N 71 61 2(ava il ab le f r om
VIASYS Healthcare c ust omer support.
F i g u re 5.4 Pry o u t th e fu se h o l d er
WARNING
It is important that the fuses are replaced with the same type and value as those removed. Failure to do so can
result in ventilat or malfunction.
L1534 Revision B December 2004
Service Manual Chapter 5 Main tena nce & Troubleshooting 91
To insert th e fuse h ol der c o ntaini ng th e ne w fuses, m ak e sure
the 4 m eta l tab s are fa ci ng up as shown i n fi gure 5.5 and
caref ul ly pus h the fu se ho ld er in to the A/C po wer modu le until it
seats
F i g u re 5.5 Insert fuse ho l d er w ith metal tab s sh ow ing
The Annual 5000 hour P.M. Procedure
Replacing the ambient air filter.
The Am bi e nt Air Filter i s lo cated at the r ear o f the ve ntilator be lo w the rear pa ne l. It is a hi gh-de ns ity
foam i ns ert. To rem ov e it, pi nch an d pul l a way fr om the ventilat or as s h o wn i n fi gure 5.6 . The filter wil l
lift out. R ep la c e wit h a cl e an filter. To p rev e nt the entry of dust i nto the v e ntilator, pr ess t he fi lter i n
ar ou nd the edges to ensu re a sn ug fit.
Figure 5 . 6 Re move high density foa m ambien t ai r fIlter
Replacing the fan filter
Pop out t he fa n filter ret ai ni ng gri d, usi n g screwdr iver.
Pinc h & pu ll ou t the foa m filte r (see fi gure 5.7)
To instal l a n e w filter, c aref ul l y pl ace t he ne w filter ov er
the fan hou si n g and pl ace t h e retain in g gr i d back onto
the fan hou si n g. Ch eck t o ma ke sure th er e ar e no
creases or fol d s in the foam fil t er as this will reduce its
effici en cy a nd cou ld allo w co ntam in ants int o the
vent il ator bo dy. Push t he reta i ni ng gri d u ntil a ll fo ur
“tabs ” c lick int o place.
Figure 5 . 7 Pin ch and remove foa m fan filter
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92 Vela Ventilator s
Replacing the filter, retaining ring & check
valve on the low pres O2 fitting
Using a ¾ i nc h open-en d ed w r ench, unscrew the l ow-pres sure oxyg en fitting fr om t he back pan el as sh o wn i n
figur e 5.8.
F i g u re 5.8 Unscrew the lo w p ressure O2 fi tting
Rem ov e th e white c o ne fi lter an d disl od g e & remov e th e white Delri n
re ta in ing ring (u se needle nose p l ie rs if ne eded) .
Using ne e dl e n ose pl iers, th e bl ack d uck bi ll e d check v alv e shoul d c ome
out e as ily.
Figure 5.9 W hite Delrin retaining w ash er
and duck bille d check val ve
To re pl ace, pl a ce the black du ck bi ll ed c he ck valv e an d in sert it into the fitting. Tap l ig htly w ith th e end
of a scr ewdrive r to mak e sur e it is se ated th e n pl ac e the Del r in ret ai ni ng rin g over it with th e “lip ” fac in g
into t he V el a a s sho w n in fi g u r e X.X. Pla ce t he ne w co n e fil t er onto the De lrin r in g a nd p u sh gently u ntil
you are s ur e it has s e ated cor r ectly. R ep la c e t he fitting and tighten down with t he ¾ inch wrench.
Replacing the filter, retaining ring and check
valve on the hi pressure fitting
Using a ¾ i nc h open-en d ed w r ench, unscrew the tw o-pi ece hi gh-pr e ssur e oxy g en fi tting. R em ove the w hit e
cone filter, the white Delr in washer & the bl ac k duc k
bil le d c heck va l ve as de scribe d a bove.
F i g u re 5.9 Unscrew the h i gh p ressure O2 fittin g
Instal l the blac k che ck va lv e an d ma ke s ur e it is se ated. Install t he
white Delr in washer wit h the li p dow n as s h o wn i n fi gure 5.1 0.
Plac e the cone filte r on the delrin washer and pus h gent ly to se at.
Repl ac e and ti ghten do wn th e fitting wit h a ¾ inc h o p en-e nd ed
wrench.
F i g u re 5.10 Installin g the Delrin Wash er
L1534 Revision B December 2004
Service Manual Chapter 5 Main tena nce & Troubleshooting 93
Replacing the muffler and muffler filter assemblies
Note
Always tak e prec a utio ns agains t s ta ti c dis c harge when work ing wit h th e
v entil ator. Reta in all hardware f or re-ass embly .
From th e back pa ne l, remov e the p o wer cord guard by
unscrewi ng the two ret ai ni ng s crew s as s ho w n in fi g ure
5.11. Un pl u g th e pow er cor d. Figure 5.11 Re movi ng the power cord guar d
Unscrew the screws holding on the Vela cover. Slide cover towards the rear of the machine and off.
F i g u re 5.12 Slid e co ve r off to w ard s th e rear
Rem ov e th e 4 scre ws se curin g the battery tr ay & lift it, and the att ach e d la rge c ap ac itor a ssem bly out.
Le an the batte r y tray a nd c ap acit or ass em bl y agai nst the left side of the V el a w hil e yo u d iscon nect th e
lar ge white M ol ex DC p ow er c on ne ctor. S et the c om pl ete a s sem bly aside.
Note
When the batteries are disconne cted, the system will automatica ll y re-set the battery status memory and will
initiate an 18-ho ur re-charge cycle upon re-connect. During th is p eriod, the red DC status light will remain on.
If the DC status light remains lit after the initial c harging period has expired, cont act VIASYS tech support as
described in Appendix A for a replacement battery.
Rem ov e th e rig ht pa n el. Th ere are tw o scr ews in the rear of the v entilat or, one i n the front top and on e
on th e l ow er l ef t side in th e ce nter.
Pull the panel out from the rear first, then ease to the back & tilt out. Lay the assembly flat. The
Mufflers are no w acc ess ib le.
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94 Vela Ventilator s
Replacing the muffler/filter assemblies.
To rem ov e & replac e the muff lers and filter, first ease out the two
sili co ne el bo ws from the muffl er assem bly fr ont p a ne l.
Lo os en th e 6 s crew s o n the front p lat e,
& remove the fr ont p lat e. R e move a nd
replac e the tw o bla ck o-rin gs on the
fro nt pane l.
Silicon e Elbow
Using ne e dl e n ose pl iers, fir ml y gras p the me tal
grid inside the R side muffler/f ilter assy. Pull
firmly towards you and the muffler/filter should
slide out. Repeat wit h t he left side muffler.
You wi ll see th at on ly th e Rig ht sid e m uffler has a filt er attached,
the L side has wire muffler only.
L1534 Revision B December 2004
Service Manual Chapter 5 Main tena nce & Troubleshooting 95
To instal l the n ew filt er/m uffler
assembli es, p u sh the left si d e
muffler (wit h no filter) firmly in and
make sur e it is push ed all the way
into t he ho usin g. Insert the right
side muffler wit h the filter, ensure
that th e se am on th e filt er lay s
horizonta lly an d press h om e.
Repl ac e the fr o nt cov er with th e
ne w O-rings an d reattac h wit h six
screws.
Instal l the two sili co ne el bo ws into th e muffler
cover a nd push in t he c enter to mak e sur e
they are s eate d.
Replacing the left panel w/power PCB.
1. Le an the ri g ht pa ne l u p to th e Vel a, sli de in the front then p ush in th e rear. Reatt ach the scre ws
on th e rear (2), front (1) an d at the lo w er e dg e of th e rig ht side (1).
2. To instal l the b attery tray, r e-a ttach th e l arg e white Mol ex co nn ector an d make s ur e it la ys
between the m uffler el bows as you replace the batte r y tray onto the Vela. This will ensure that
ther e is e n ou g h spac e for th e larg e cap acit o r a ttached to the Battery tray. Re-attach the 4
screws ho ld in g the batte ry tray in place . Re co nn ect the ribbon cable.
3. Sli de th e cove r in p lac e from t he rear an d pu sh the top fr ont edge hom e un der the l ip. Attach the
screws.
4. Reattach the power cord a n d re-attach t he p ow er cor d guard wit h the two screws.
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96 Vela Ventilator s
Troubleshooting
If The Ventilator Does not Turn ON
If you turn the po wer s witc h ON a nd th e ON in dicato r d oe s not i ll umi nate , perfor m the trou bl es ho oti ng
proc e dures given in Tabl e 5.1 .
Table 5.1
Trou bleshooting Po wer-Up Proble m s
PROBLEM POSSIBLE CAUSE ACTION
Ventilator plugg ed into an AC
source but does not power up.
No power at AC outlet, or the
AC/DC select switch is in the A LT
PWR SOURCE position, or the AC
Line Voltage switch is set to the
wrong voltage.
Try connecting to a known good AC
power source. Make sure the AC/DC
switch is in the A C position. Make
sure, the voltage setting of the
ventilator match es the voltage of your
power source. Check the fuse
assembly if the ventilator still doe s not
power up, Contact your Bird Products
Certified Service Technician. Ch eck
the DC voltage output supply fro m
transformer at J 9. Check DC voltage
at J3. Black is gr ound. Red is 5 volts
DC and Yellow is 14.7 to 20 DC. If
voltage is not pr esent, replace Power
Supply PCB.
Ventilator attach ed to alternate
external DC power source but
does not power up.
If the external source is a battery,
the battery may not be charged, or
the AC/DC select switch may be in
the AC position.
Plug the ventilat or into a known good
AC source, or to a known good
battery and see if it powers up. If
using a 12VDC power source, set the
AC/DC select switch to the ALT PWR
SOURCE position. Check the fuse
assembly. If the ventilator still do es
not power up, contact your Bird
Products Certified Service
Technician. Che ck DC voltage at J3.
Black is ground. Red is 5 volts D C
and Yellow is 14 .7 to 20 DC. If
voltage is not pr esent, replace Power
Supply PCB.
L1534 Revision B December 2004
Service Manual Chapter 5 Main tena nce & Troubleshooting 97
Reviewing the Transducer Wavefor m s
To re view th e trans du ce r wave fo rms se t in Ch ap te r 4, in nor mal op er at ional mod e pr es s the tou c h
scre en imm ed i ately ov er th e wavefor m h ea di ng displ ay on the MAIN s cre en.
F i g u re 5.13 Select w a vefo rm d i splay ed
A scrolli ng dr o p d ow n me n u dis pl ays all the poss ib le wave form ch oices. To scro ll thr o u gh th e cho ice s
use t he Data D ial.
Figure 5 . 14 Drop d ow n me nu
From th e ch oices disp la ye d, sel ect the tr ansducer you wish to revi ew ( in this case, tra nsd ucer 0) an d
pres s the Acce pt mem br an e b utton.
F i g u re 5.15 Selectin g Xducr
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98 Vela Ventilator s
The wav eform immedi ately ch an ge s to disp la y the si g na l associ ated w ith the s el ected transd uc er (in
this c ase it is Turbine Speed).
F i g u re 5.16 T urb in e Speed w a vefo r m d i spla yed
L1534 Revision B December 2004
Appendix A Contact & Ordering Information
How to Call for Support
To get he lp on performin g any of the pr ev enti ve ma int en a nc e ro utines, o r to re qu est servi ce on your
vent ilator, cont act VIASYS Healthcare Customer Care:
Technical Support
Hour s: 7: 00 AM to 3: 30 PM (PST) Mond ay th roug h Friday
Phone: (7 60 ) 778 -720 0
Fax: (760) 778-7377
VIASYS H ealthcare Customer Care Helpline
Hours: 24 ho urs, se ve n days a week
Phone: (8 00 ) 934 -247 3 (From within the US)
Fax: (760) 778-7377
VIASYS Healthcare Critical Care
11 00 B ir d Ce nt er Dri ve
Palm Spring s, CA 92 262-809 9
U.S.A.
Phone: (7 60 ) 778-720 0
(800) 328-4139
Fax: (760) 778-7274
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100 Vela Ventilator s
Ordering Parts
To obtai n Vel a vent il ator parts cont act cust o mer se rvic e at:
Customer Service:
Hours: 7:00 Am to 3:30 PM (PST)
Monday thro ugh Friday
Phone: (8 00 ) 328 -413 9
(760) 778-7200
Fax: (760) 778-7274
L1534 Revision B December 2004
Appendix B Diagrams & Schematics
Wiring Diagram
Tubing Diagram
Pneumatic Schematic
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102 Vela Ventilator s
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Service Manual Appendix A Contac t & Orderin g In format io n 103
L1534 Revision B December 2004
104 Vela Ventilator s
L1534 Revision B December 2004
Appendix C Specifications
Oxygen Supply
High Pressure Connector
Pressu re Range : 40 to 85 psig (Sup ply Oxygen)
Temper ature: 10 to 40
o
C (50 to 1 0 4
o
F)
Humidity: Dew Point o f ga s shou ld be 1 . 7
o
C (3
o
F) bel o w the ambi ent t emper ature
(minimum)
Minimum Flow: 80 LPM at 20 p sig
Inlet Fitting: CGA DISS-type body, No. 1240
Low Pressure Connector
Pressu re Range : 0 to 0 . 5 p s ig (Sup ply Oxygen)
Maximum Flow: 80 LPM
Inlet Fitting: ¼ inch tapered
Electri cal Supply
AC Power Supply
The ventilat or op erates w ith in spec ific ati on w he n con nect ed to the foll owin g AC po wer s u pp li es:
Nomina l Vo lta g e Range Freq ue ncy Rang e
10 0 VA C (85 to 11 0 VA C) 47 to 65 Hz
12 0 VA C (102 to 1 3 2 VA C) 55 to 65 Hz
23 0 VA C (196 TO 253 V AC) 47 to 65 Hz
24 0 VA C (204 TO 264 V AC) 47 to 65 Hz
DC Power Supply
The ventilat or can also o p era te from a 48 V DC p ow er s ource (i nterna l b at t ery).
Internal Battery:
The ventilat or op erates w ith in spec ific ati on for a pproximat e ly 3 h o urs w ith a fresh, full y ch arged battery
un der moderat e loa d. Maxi m um ch ar ge ti m e for a fu ll cha r ge is 8 to 12 h ours.
L1534 Revision B December 2004
106 Vela Ventilator s
Data Input / Output
Analog Inputs
The ventilat or prov id es up to 8 programm a bl e ch an n els for an al og s ig n al i np uts. Eac h c ha nn el s h all be
scal a bl e for th e inp ut rang es s pecifi ed.
Rang es: 0 to 1 V DC
0 to 5 V DC
0 to 10 VDC
Resol uti on: 0.25 mV (for 0 to 1 VD C )
1.37 mV (for 0 to 5 VD C )
2.5 mV (for 0 to 10 V D C)
Analog Outputs
The ventilat or prov id es 4 sign als at the an al o g o utp ut co nn e ctor:
1. Airway Press ure, P AW:
Rang e: -60 to 14 0 cm H 2
O
Scal e: 1 cmH 2
O/25 mV
Accuracy: ± 50 mV or ± 5% o f re a di ng, which ev er is gr eater
Zero Offset: 1.5 V DC at 0 cmH 2
O
2. Flow
Insp iratory/Exp irator y :
When select e d , the ve ntilator prov id es a co nt in uo us a n al og voltag e repr es entative of i nsp irator y
flow m in us expiratory flow.
Rang e: -3 00 to 200 L P M (Adu lt)
Scal e Factor: 1 LP M / 10 mV (Ad ult)
1 LP M / 25 mV (Pe di atric)
1 LP M / 50 mV (Ne on ate)
Accuracy: ± 10 % of re ad i ng or ± 30 mV, whic h eve r is g r eater
Zero Offset: 3.0 V DC at 0 LPM
Machi ne:
When select e d the ve nti lat or prov id es a co nt in uo us a n al og voltag e repr es entative of ma c hi ne
de liv ered fl ow.
Rang e: 0 to 200 LPM (Ad ult)
Scal e Factor: 1 LP M / 25 mV (Ad ult)
1 LP M / 50 mV (Pe di atric)
1 LP M / 100 mV (Ne on ate)
Accuracy: ± 10 % of re ad i ng or ± 30 mV, whic h eve r is g r eater
Zero Offset: None
L1534 Revision B December 2004
Service Manual Appendix B Specifications 107
3. Volume:
Rang e: -1.0 0 to 4.00 L (Ad ult)
Scal e Factor: 1 L / V (Ad ult)
1 mL / 5 mV (Pediatric)
1 mL / 10 mV (Neo na te )
Accuracy: ± 1 0 % of re ad i ng or ± 30 mV, whic h eve r is g r eater
Zero Offset: 1.000 V DC
4. Brea th Phase
The ventilat or prov id es a co nt in uo us a n al og voltag e repr es entative of bre ath p h ase (I ns pir atio n = 5
VDC, Expiration = 0 VDC).
Digital Communication
The ventilat or is con struct ed with on e RS -2 32 port for bi- di r ection al commun icat io n of dat a.
CAUTION
This is a non-operational port. Do not make conn ection.
Printer
The ventilat or is con struct ed with a sta nd ar d 25- pi n femal e Centronics p ar all el pri nter port.
CAUTION
This is a non-operational port. Do not make conn ection.
Remote Nurse Call
The ventilat or has a mo d ul ar jack co nfigur ed to interf ac e wit h ext ern al sy stems that ar e ei ther w ire d for
norm al ly op en (N.O., clos e on alar m) or normally clos ed (N.C., op e n o n al arm) si g na ls.
Video Output
The ventilat or is con struct ed with a vide o ou t put con nect or.
CAUTION
This is a non-operational port. Do not make conn ection.
Atmospheric & Environmental Specifications
Temperature and Hu midity
Storag e
Tenperature: −20 to 60
o
C (−4 to 14 0
o
F)
Humidity: 10 to 95 % R H non-con de ns in g
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108 Vela Ventilator s
Operating
Temper atire 5 to 40
o
C (41 to 1 04
o
F)
Hum id ity 15 to 95 % R H non-con de ns in g
Barometric Pressure
76 0 to 54 5 mm Hg
Physical Dimensions
Overall Size
13 ” W x 14 .5” D x 12” H
Weight
< 38 l bs.
L1534 Revision B December 2004
Appendix D Service Event Codes
CODE DESCRIPTION
1 MSP got an unr e c ognized packet from IOP
2 IOP did not r emove the high priorit y packet last sent to it
3 IOP did not send the event packet in time
4 MSP detected a checksum er ror in a high priori ty packet
5 MSP detected too many checksum er ro rs in lo pr iori ty communications
6 MSP unknown breath phase
7 MSP unknown mode
8 MSP unknown breath typ e
9 An msp task didn’t run. Detected by the backgnd ta sk.
10 userint task got an invalid enumeration for a switch or an alarm
11 Servos detected an invalid servo type
1 2 TEPRO M detected checksum er ror in tur bine eeprom
13 All required queues we re not active on powe r up
14 A queued "pass around" message did not get back
15 A queued "pass around" message was responded b y the wrong task
16 The queue of IO P messages was full
17 Turbine out of control, flo w para m eter
18 Turbine out of control, speed par a m eter
19 Turbine out of control, exhl pressure param eter
20 Turbine out of control, turb pressure param eter
21 Indicates a problem wi th the spee d encoder
22 Indicates a problem wi th the tur bine differential pr essure transduce r
23 The turbine is running in reverse
24 The O2 sensor is disconnected
25 Ambient air reading is too low
26 The 100 % cal A/D reading is too low
27 The A/D readings never stabilized during a calibration
28-39 UNUSED
40 MSP code ran awa y, hit runa wa y trap, CPU can't r ecover
41 MSP addressed a nonresponsive memor y/dev ice or a none xistant memory/ device
42 IOP did not interr upt MSP wi thin 2.1ms
43 MSP undefined interrupt err or
44 MSP invalid opcode error
45 MSP spurrious interrupt erro r
46 MSP divide by z ero interrupt
47 MSP parity e rror
4 8 U N U S E D
49 MSP watchd og p al error
50 MSP BACKG ND task found a ROM checksum error
51 MSP INTO instru ction executed, o v erflow flag was set
52 MSP GP fault
53 MSP Stack fault
54 MSP Bound err o r
55 MSP task MSG tried to enqueue a message, but the message queue was full
56 MSP configuration key was rem oved or changed
57-59 UNUSED
60 MSP discovered that there was no cal data
61 Transducer f ault occurred
62 User svt calibration failed
63 User interface could not use settings from non-volatile ram
64 Vent power ed-up
65 Self reset occurred
66 Turbine S/N in eeprom doesn 't m atch teprom
67 AC powe r alarm occurred
68 External battery alarm occurred
69 Internal batte r y medium alarm occurred
L1534 Revision B December 2004
110 Vela Ventilator s
70-199 UNUSED
200 MSP POST: CPU command failure
201 MSP POST: CPU timer failure
202 MSP POST: Internal RAM failure
203 MSP POST: Ext ernal DPRAM failure
204 MSP PO ST: Program Memo ry C hecksum calcu l ation failure
205 IOP e xecuted unused code space
206 IOP Background checksum test fa iled
2 0 7 I OP c h e c k s u m
2 0 8 I OP c h e c k s u m
209 IOP e xternal 32k sram failure
210 Three consecutive exhalat ion pressure mismatches
211 Three consecutive exhal ation flow mismatches
212 Three consecutive turbine pressure mismatches
213 Three consecutive internal batter y charge mismatches
214 Three consecutive external batte r y charge mismat ches
215 Three consecutive oxygen pres mismatches
216 Three consecutive temperatu re mi smatches
217 Three consecutive exhalat ion valve DAC mismatches
218 Three consecutive turbine DAC mismatches
219 Three consecutive 48 vo lt supply mismatches
220 Three consecutive O2 m onitor voltage mismatches
221 Three consecutive internal refe ren c e voltage mism atches
222-229 UNUSED
230 IOC OMM: No se rvo data for t he DACs written to memory
231 IOC OMM: A/D data not ret rieved from memor y
232 IOC OMM: Incorrect checksum
233 IOC OMM: Illegal command
234 IOC OMM: Incorr ect packet size
235 IOC OMM: Incorr ect command ha ndler called
236 IOC OMM: Para meter was out of range
237 IOC OMM: IOP did not receive an MSP packet for ov er 100 ms
238 No MSP sync wi t hin 2sec of IOP post finished
239-247 UNUSED
248 IOP discovered a fan failure
249 IOP discovered a fan failure condition has ended
250 Three consecutive IOP discovered DAC loop-back f ailure
251 IOP discovered p ower supply over -temp
252 IOP discovered DAC loop-back is ok
253 IOP discovered p ower supply is ok
L1534 Revision B December 2004
Operat ors Ma nu al Appendix D Ev ent Codes 111
L1534 Revision B December 2004
Glossary
Breath Int erval Elaps ed time fr om the start of on e breath to t he st art of the next.
Pres et An o pe r at or se t ventilat or par ameter.
Trigg er Value at w hic h the v entilat or in itiat es del ivery of a br eath as a res ult of
measur ed p ati ent eff ort.
BTPS Body Tem pera t ure at A mb ie nt Press ure, S at urat ed.
ATPD Ambi e nt Temp erature, Am bi e nt Pressure, Dr y.
Dem a nd Fl ow The flow ge nerated by the ve ntilator to me et the pati ent’s fl ow dem a nd
in or d er to mai ntai n PE EP at the pres et leve l.
PEEP Posit ive E n d Expir atory Pres s ure.
AC Alter natin g Cur rent (mai ns e le ctricity).
Bias Flo w A contin uo us fl ow thro ug h the pati ent breath i ng c ircuit.
Bpm Bre aths per m i nute.
Breath P eri od The l en gth of time b etw ee n mach in e-i nit iat ed bre aths. De pe nds on the
Breath Rate setting.
Breath R ate The num b er of breaths de liv er ed in a m in ute.
BTPD Body Tem pera t ure at A mb ie nt Press ure, Dry
Button A push button switch used t o toggle a function on or off.
cmH 2O Centim eters of water pressure .
Controls Any butto n, to u ch scr ee n icon, switch, or kn o b that all o ws y ou to
modify the ven t ila to r’s behavior.
Event An a no ma lo us condit io n that occurs durin g ve ntilator op er ati on.
Flow The r ate at w hi ch gas is de liv ered. Me as ured in liter s per min ute (l pm).
Indi cato rs A visual el eme nt sh owin g ope r ation al stat us.
L Liters. A unit of volume.
LED Li ght Emittin g Diod e
L/min Liters per minute. A unit of flow.
Mode An o pe r ati n g state of the ventil ator th at deter min es th e all o wabl e
breath types.
Monitor ed P ar ameter A me asur e d valu e disp laye d i n the scre en.
O2 Oxygen
Patient Breathi ng Circuit The tubi ng that prov id es th e ventilat ory i nterface betwee n th e patie nt
an d ve nti lat or.
Paw Airw ay Pr essur e. Me asur e d i n cmH2O at the exhal ati on v al v e.
L1534 Revision B December 2004
Service Manual 113
PEEP See Positiv e E nd Expirat ory Pressur e.
PIP Peak Inspir atory Press ure . S hows the high est circuit pr essu re to
occur d uri ng in spirati on as measur e d at th e exha lat io n valv e . The
disp la y is updated a t the end o f in sp ira t io n. PIP is not up date d fo r
sp on tane ou s bre at hs.
Pplat Platea u Pr essu re. Me asur e d d uri ng an In sp ir atory Hold m an euver.
Used to c alc ul ate Stat ic C om pli a nce. ( Cst).
PSIG Pounds pe r squ ar e in ch gauge . 1 PSIG = .07 b ar
Sigh Breath A Vol um e C ontrolle d mac hi n e bre ath havin g a tid al v ol um e equa l to
on e-an d-a-h alf times ( 15 0 % of ) the cu rrent tid al v ol ume s etti ng.
User Verif icatio n Tests (U VT) A gro u p of test s to ch eck v entilator p erformance pri or to c o nn ecting
the v entilat or to a pati ent.
WOB Patient Wor k o f Breathi ng i. e. a me as ure of P atie nt Effort.
L1534 Revision B December 2004
114 Vela Ventilator s
Index
A
AC power · 71
active matrix LCD · 18
alarm window · 71, 72
alar ms check · 71
B
back light i n verter · 18, 20
battery status · 23
battery tray · 26
breath rate · 71
breathing circuit · 5 8
C
calibrat i on curves · 15
co mp lete disassem b ly of the unit · 24
customer service · 100
D
dam p ener gasket · 39
DC power connector · 26
DC voltage · 96
differential pressure · 17
disconnect the battery · 23
display · 71
drawings, diagrams and schem atics · 16
E
electronic · 18
ESD susceptible electrical co mponents · 23
exhalation s y stem · 17, 21
exhalation valve assemb ly · 38
external battery · 71
F
filter check · 57
filters · 16
flow delivery sy stem · 21
Flow Delivery S y stem · 17
flow sensor PCB · 37
G
green oxy g en nebulizer tub e · 32
H
high and low pressure oxygen fittings · 47
high pressure · 71
high pressure lim it · 71
I
inspirator y h ol d solenoid · 39
inspirator y h ol d valve · 18
inspirator y ti me · 71
intake and ou tput elbows · 47
J
J1 position on the main P CB · 35
L
leak test · 58
left panel · 28
light em itting diodes · 20
liquid cr y stal display · 19
M
main controller system · 20
maintenance schedules · 16
manifold base asse mbly · 40
L1534 Revision B December 2004
Service Manual 115
manomet er · 71
MAP · 71
memb rane key panels · 18
memb rane panel · 20
monitor perform ance · 71
monitored parameters · 71
mu ffler (output) · 5 0
N
NIST · 15
O
O2 sensor · 43
optical encoder · 18, 20
over pressure relief valve a ssemb ly · 48
oxy g en blendi ng s y stem · 18, 22
oxy g en diffuser tube · 41
P
PCMCIA card · 28
peak inspiratory pressure · 71
PEEP · 71
performance checklist · 73
PIP · 71, 72
pneum atic system · 17
power cable guard · 2 4
power fail check · 71
power PCB · 29
power sy stem · 20
power-on prob lem s · 96
R
rear panel · 44
resistive touch screen overlay · 18
right and left mu ffl er/filter assemblies · 50
S
safety check valve guard · 42
safety system · 18
service c alls · 99
sock filter (input) · 50
SVGA output ribbon cable · 25
switch check · 56
T
the main PCB · 34
three o-rings · 41
three visible o-rings · 41
tidal volum e · 71
tools & equip ment · 15
touch screen · 20
transform er · 96
turbine & m u ffler asse mbl y · 47
turbine gas delivery s y stem · 17
turbine m o tor driver PCB: · 49
U
UIM · 18, 19
umbrella valve · 39
W
watchdog timer · 21
L1534 Revision B December 2004
