Invacare Pronto M91 Service Manual

SECTION 3—SAFETY INSPECTION/TROUBLESHOOTING
Part No. 1125038 29 Pronto® M91™and M94™
Motor/Gearbox/Brake
Battery indicator flashes the charge
level is low - immediately after
recharge.
Battery failure.
Malfunctioning battery charger.
Electrical malfunction.
Check batteries for shorted cell.
Replace if necessary.
Contact Dealer/Invacare for Service.
Contact Dealer/Invacare for Service.
Battery indicator flashes the charge
level is low - too soon after being
recharged.
Batteries not charged.
Weak batteries.
Have charger checked.
Replace batteries if necessary.
Contact Dealer/Invacare for Service.
Motor “chatters” or runs irregular. Electrical malfunction. Contact Dealer/Invacare for Service.
Joystick erratic or does not respond
as desired.
Damaged motor coupling.
Electrical malfunction.
Controller programmed
improperly.
Contact Dealer/Invacare for Service.
Contact Dealer/Invacare for Service.
Contact Dealer/Invacare to have
controller reprogrammed.
Wheelchair does not respond to
commands.
Poor battery terminal
connection.
Have terminals cleaned.
Power indicator Off - even after
recharging.
Electrical malfunction. Contact Dealer/Invacare for Service.
SYMPTOM PROBABLE CAUSE SOLUTIONS
Motor makes a
clicking noise.
Bad coupler between motor and
gearbox or bad bearings.
Replace coupler.
If bearings are bad, replace motor.
Raised commutator plate inside of
motor.
Ohm out motor and replace motor if high reading
is present. Normal reading is 0.2-5 Ohms.
Grinding noise or
motor is locking up.
Bad gearbox.
Bad coupler between motor and
gearbox or bad bearings. Bad gears.
Replace gearbox.
Replace coupler.
If bearings are bad, replace motor.
Motors stall and
start up again.
Current rollback. Stop driving and allow electronics cool.
Wheelchair will not
drive with power
on (E09 or E10).
Check motor locks. Engage motor locks to drive wheelchair.
Motor chatters or
runs erratically, or
only one motor
turns.
Damaged connector or worn
brushes.
Bad motor or gear box.
Ohm out motors. Check brushes and replace
brushes if necessary. Replace motor if high reading
is present. Normal reading is 0-5 Ohms.
Controller malfunction. Check for error codes with programmer. Refer to
electronics manual, part number 1114808.
SYMPTOM PROBABLE CAUSE SOLUTIONS

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"