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Invacare IRC5PO2 Oxygen Equipment User Manual

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SECTION 22—TIMING

Part No 1148070 73 Perfecto

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™

SECTION 22—TIMING

ƽ DANGER

Topreventelectricalshock,ALWAYSdisconnectconcentratorfromelectricaloutlet

beforeservicing.

Useextremecarewhenmakingadjustmentstothetimingswitch.DONOTallow

screwdriveroryourhandstocontacttheP. C. Boardwhenunitispluggedinand/oron.

Turnunitoffandunplugbeforeadjustingtimingswitch.Electricalshockispossible.

Toaccommodatethevaryingtoleranceswhenreplacingcomponents,anadjustabletimer

isusedtocontroltheshifttimeofthepressureequalization(P.E.)valve.The SensO

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board

allowsforautomatic(microprocessorcontrolled)adjustmentsoftheP.E.shifttimes.Non‐

SensO

2



boardsallowformanualadjustment.

Autotuning

ƽ WARNING

DONOTpushtheautotunebuttonwhilepoweringup.Otherwise,thefactorysettings

willbeerased.

NOTE:Forthisprocedure,refertoFIGURE 22.1onpage 74.

1. Turnpoweroff()andunplugtheunit.

2. Removecabinet.RefertoRemovingCabinetonpage 23.

3. Plugtheunitinandturnthepoweron().

4. LocatetheP.C.board.

5. Waitforthemainvalveshifttoindicateoneofthefollowing:

•IftheP.C. boardisnew,thefrontpanelREDindicatorlightwillslowlyblink,

indicatingautotunehasinitiated.

•IftheP.C. boardisused

andhasperformedautotuningbefore,pressandrelease

thesmallpushbuttonontheP.C. board.ThefrontpanelREDindicatorlightwill

slowlyblink,indicatingtheunitisautotuningandautomaticallyadjustingtheP.E.

valvetiming.

6. Settheoutputflowto5.0L/min.

7. TheGREEN(onboard)diagnosticlightwillflashthecurrentvalueoftheP.E.valve

timingnumber.

8. PlacethecoverbackontheunitbutDONOTinstallthecoverscrews.Lettheunitrun

untilautotuningiscompleted.

9. Whenautotuningiscomplete,theREDfrontpanelindicatorlightwillchangefroma

slowblinkingtoaflashingofthefinalP.E.valvetimingnumber.

/O

I

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