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SECTION 3—SAFETY INSPECTION/TROUBLESHOOTING
At’m and At’m QT 22 Part No. 1125078
Motor/Gearbox/Brake
SYMPTOM PROBABLE CAUSE SOLUTIONS
Erratic perfor-
mance of wheel-
chair (driving uphill,
increase in braking
distance).
Low tire pressure. Inflate tires to the proper tire pressure.
Wheelchair will not
drive.
Low tire pressure.
Motor engagement handles are dis-
engaged.
Batteries require charging.
Charger plugged in.
Circuit breaker tripped.
Inflate tires to the proper tire pressure.
Engage motor engagement handles.
Charge batteries. Make sure the setting on the
charger is correct.
Unplug charger from wall outlet before operating
the wheelchair.
Press the reset button. Refer to Resetting the Cir-
cuit Breaker on page 54.
Motors stall and
start up again.
Current rollback. Stop driving and let electronics cool.
Motor “chatters”
or runs irregularly.
Electrical malfunction. Contact Invacare.
Only one drive
wheel turns.
Electrical malfunction.
One motor is disengaged.
Contact Invacare for service.
Engage motor engagement handle.
Joystick erratic or
does not respond
as desired.
Electrical malfunction.
Controller programmed improperly.
Contact Invacare for service.
Reprogram controller (Refer to electronics man-
ual supplied with wheelchair).
Wheelchair does
not respond to
commands.
Poor battery terminal connection. Have terminals cleaned.
Power indicator off
- even after
recharging.
Electrical malfunction. Contact Invacare for service.