SECTION 2—SAFETY INSPECTION/TROUBLESHOOTING
17
Motor chatters or
runs erratically, or
only one motor
turns.
Damaged connector or worn
brushes.
Bad motor.
Ohm out motors. Replace motor if high reading is
present. Normal reading is 0-5 Ohms.Refer to
Electro-Mechanical Parking Brake Test on
page 22.
Controller malfunction.
Check for error codes with programmer. Refer to
electronics manual provided.
Wheelchair veers
to the left or right
when driving on
level surface.
Uneven tire pressure.
Motors out of balance.
Inflate tires.
Replace tires if worn.
Use programmer to balance motors.
E09/E10 error code
will not go away.
Bad motor connection.
Bad brake coil.
Check all connections. Ohm out each brake coil.
Normal reading is 45-50 Ohms. Refer to Elec-
tro-Mechanical Parking Brake Test on page 22.
Excessive clicking
coming from
motor.
Bad bearing in motor.
Replace motor.
Loose wheel hardware.
Tighten hardware, (use removable Loctite™ on
hardware). Follow torque settings in this manual.
Motor stutters.
Poor connection or worn drive
cylinder.
Check drive cylinders and replace if necessary.
Motor fails to start
after initial installa-
tion.
Battery voltage is too low.
Bad connection.
Check batteries and recharge if necessary.
Check connector.
Only one (1) drive
wheel turns.
One (1) motor is disengaged.
Electrical malfunction.
Engage motor engagement handle.
Replace motor.
Joystick erratic or
does not respond
as desired.
Electrical malfunction.
Controller programmed improperly.
Replace joystick.
Reprogram controller. Refer to electronics man-
ual provided.
Wheelchair does
not respond to
commands.
Poor battery terminal connection.
Clean the battery terminal connectors.
Motor is running
then fails to restart
when stopped.
Heavy load on the motors forcing
controller into the current rollback
mode.
Leave power ON and allow controller to count
down, and recharge the wheelchair overnight with
power ON.
Blown fuse in battery wiring
harness.
Replace battery wiring harness.
Damaged Motor
Replace brushes if necessary, or replace motor if
internal damage is determined.
Ohm out motor to check for possible internal
damage (worn out brushes may be possible).
Refer to Electro-Mechanical Parking Brake Test
on page 22.
Controller power stage board or
relays may be damaged.
Replace controller or send to Invacare for repair.
SYMPTOM
PROBABLE CAUSE
SOLUTIONS