SECTION 3—SAFETY INSPECTION/TROUBLESHOOTING
27
Troubleshooting - Motor/Gearbox/Brake
Joystick erratic or does not respond as
desired.
Damaged motor coupling.
Electrical malfunction.
Controller programmed improperly.
Inspect motor coupling. Refer to Replacing the
SSD Motor or Gearbox Only on page 40.
Contact Invacare for service.
Check programming. See electronics manual.
Wheelchair does not respond to
commands.
Joystick error.
Calibrate joystick.
Check programming.
Check "INPUT TYPE": Programming Menu.
Check joystick throw: DIAGNOSTICS menu.
Re-Calibrate Joystick.
Check Drive Lock Out status.
Check motor brake engagement.
Try different Joystick.
Power indicator off - even after recharging. Electrical malfunction.
Contact Invacare for service.
SYMPTOM
PROBABLE CAUSE
SOLUTIONS
Motor makes a clicking noise.
Bad gearbox, chipped or worn
gears.
bad bearings.
Replace gearbox.
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 .5-5
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 starts up again.
Current Rollback.
Stop driving the wheelchair and , with the
power on, let electronics cool.
Wheelchair will not drive with power on
(E09 or E10).
Check motor locks.
Engage motor locks to drive wheelchair.
Swap out motor leads. Using a programmer,
check for error codes.
NOTE: WHEELCHAIRS WITH G-TRAC
ONLY - Before swapping motor leads for
troubleshooting purposes, use the
programmer to turn off G-trac in all drives.
Motor chatters or runs erratically, or only
one motor turns.
Damaged connector or worn
brushes.
Bad motor or gear box.
Commutator bars expanded.
Water or oil in motor.
Ohm out motors. Check brushes and
replace brushes if necessary. Replace motor
if high reading is present. Normal reading is
.5-5 Ohms. 4 Pole ONLY.
Inspect commutator bars for expansion
from getting to hot. Replace motor.
Rotate gearbox by hand.
Controller malfunction.
Check for error codes with programmer.
Refer to the MK6i Electronics Programming
Guide, part number 1141471.
SYMPTOM
PROBABLE CAUSE
SOLUTIONS
