Invacare Pronto M91 Service Manual

SECTION 3—SAFETY INSPECTION/TROUBLESHOOTING
Part No. 1125038 33 Pronto® M91™and M94™
Field Load Test
NOTE:Forthisprocedure,refertoFIGURE 3.1onpage34.
NOTE:Thefollowingtestcanalsobeperformedthroughthecontrollerofthewheelchairalong
witharemoteprogrammer.Refertotheelectronicsmanualsuppliedwitheachwheelchair.
Oldbatterieslosetheirabilitytostoreandreleasepower,duetoincreasedinternal
resistance.Thismeansthatasyoutrytotakepowerfromthebattery,someofthatpower
isusedupintheprocessofpassingthroughthebattery,resultinginlessvoltageatthe
posts.Themorepowerdrawn,thelowerthevoltageavailable.Whenthislostvoltage
dropstheoutput1.0voltsunderload(2.5forapair),replacethebatteries.
Tospotthisproblem,testbatteriesunderload.
Useadigitalvoltmetertocheckbatterychargelevelatthechargerconnector.Itislocated
onthejoystick.
NOTE:READtheseinstructionsCAREFULLYandthemanufacturer’sinstructionsonthe
digitalvoltmeterbeforeusingthedigitalvoltmeter.
NOTE:InvacarerecommendsthatONLYaqualifiedtechnicianperformthistest.
1. EnsurethatpowerisOFF.
2. Makesurebatteryisfullycharged.Anextremelydischargedbatterywillexhibitthe
samesymptomsasabadone.
3. Removethefootrestsfromthewheelchair.
4. Connectthevoltmeterleadstothechargerportonthewheelchairasshownin
FIGURE 3.1onpage34.Mostdigitalvoltmetersarenotaffectedbypolarity,however,
analogmeters(meterswithswingingneedles)canbeandshouldbeusedcarefully.
Agoodmeterreadingshouldbe25.5to26VDC.
 WARNING
When performing STEPS 5 and 6, ensure feet are clear from casters and wall
otherwise injury may occur.
5. Sitinwheelchairandplacefeetagainstawall,workbenchorotherstationaryobject.
6. TurnthepowerONandcarefullypushthejoystickforward,tryingtodrivethe
wheelchairthroughthestationaryobject.
NOTE:Thisputsaheavyloadonthebatteriesastheytrytopushthroughthestationaryobject.
If
thewheelsspin,havetwoindividuals(oneoneacharm)applyasmuchdownwardpressureas
possibleonthearmsofthewheelchair.
7. Readthemeterwhilethemotorsarestraining,nolongerthan3to4seconds,to
determinethevoltageunderload.
NOTE:Ifthevoltagedropsmore
than2.5voltsfr omapairoffullychargedbatterieswhileunder
load,theyshouldbereplacedregardlessoftheunloadedvoltages.

Invacare Pronto M91 Specifications

Power and Performance

maximum speed	6.5 mph / 4.5 mph
incline capability	9˚
weight capacity	300 lb. (400 lb. option)

Wheel and Caster Sizes

front casters	6" x 2"
drive wheels	14" x 3"
rear casters	6" x 2"

Weight and Dimensions

length with footboard up	39"
length with footboard down	40" - 42"
width excluding joystick	25.9"
height	37" - 48"
seat width	18" - 22"
seat depth	16" - 20"
overall height	37" - 40"
back height	18"
seat-to-floor height	21" - 23"
weight with batteries	273 lb.
weight without batteries	199 lb.
wheelchair mass	275 lb.
turning radius front	19.5"
turning radius rear	21.5"
ground clearance	3.25"