Invacare Pronto M50 Service Manual page 26

SECTION 3—SAFETY INSPECTION/TROUBLESHOOTING
SYMPTOM
Damaged connector or worn
brushes.
Bad motor or gear box.
Motor chatters or
runs erratically, or
only one motor
Motor release lever is disengaged.
turns.
Controller malfunction.
Wheelchair veers Uneven tire pressure.
to the left or right Motors out of balance.
when driving on
level surface.
Bad seal around drive shaft.
Gearbox is leaking Loose hardware.
Fluid.
Bad bearing in motor or gearbox.
Excessive clicking
coming from
Loose wheel hardware.
motor/gearbox.
Rough driving. Gearbox shaft movement or bent
shaft.
Poor connection or worn brushes.
Motor Stutters.
Battery voltage is too low.
Motor Fails to start
Bad Connection.
after initial
Brake Disengaged.
installation.
Pronto® Series
PROBABLE CAUSE
26
SOLUTIONS
Ohm out motors. Check brushes and replace
brushes if necessary. Replace motor/gearbox if
high reading is present. Normal reading is 0-5
Ohms. Refer to Motor Testing on page 31,
Replacing Motor Brushes on page 116 or
Removing/Installing the Motor on page 112.
Engage motor release levers. Refer to
Engaging/Disengaging Motor Release Lever on
page 114.
Check for error codes with programmer. Refer to
electronics manual.
Inflate tires.
Replace tires if worn.
Use programmer to balance motors.
If seal is bad, replace motor/gearbox. Remove
motor brushes and inspect for grease
contamination. Replace motor/gearbox if
contamination is found. Refer to Replacing Motor
Brushes on page 116 or Removing/Installing the
Motor on page 112.
If loose hardware is found retighten hardware.
Replace motor/gearbox. Refer to
Removing/Installing the Motor on page 112.
Tighten hardware, (use removable Loctite™on
hardware). Follow torque settings in this manual.
Replace motor/gearbox. Refer to
Removing/Installing the Motor on page 112.
Check DCL connectors. Check brushes and
replace if necessary. Refer to Replacing Motor
Brushes on page 116.
Check batteries and recharge if necessary. Refer
to Charging Batteries on page 104.
Check connector.
Engage brake.
Part No. 1125075