Troubleshooting - Battery - Invacare Pronto M91 Service Manual

SYMPTOM
Heavy load on the motors forcing
controller into the current rollback
mode.
Blown fuse in battery wiring
harness.
Motor is running
Damaged Motor
then fails to restart
when stopped.
Controller power stage board or
relays may be damaged.
Controller senses heavy load and
Motor runs but has entered the current rollback
loses power. mode.
Bad connection on wheelchair.
Wheelchair loses all
power while
driving.

Troubleshooting - Battery

SYMPTOM
Blown battery fuse or damaged cables.
Batteries won't
charge.
Batteries sat discharged too long.
One or both batteries may be bad (if
Short Charge Time
batteries charge up to soon).
Bad connection or blown fuse. Check
Joystick connection.
No power to
Batteries are dead.
wheelchair motors.
Loose battery connections
Corroded battery Possible water, salt, or urine
wiring connections. damage.
E14 Error code. Low Voltage
Part No. 1125038
SECTION 3—SAFETY INSPECTION/TROUBLESHOOTING
PROBABLE CAUSE
PROBABLE CAUSE
25
SOLUTIONS
Leave power ON and allow controller to count
down, and recharge the wheelchair overnight with
power ON.
Replace battery wiring harness.
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).
Replace controller or send to Invacare for repair.
Stop driving and let electronics cool.
Leave power ON and allow controller to count
down, and recharge the wheelchair overnight with
power ON.
Turn power "OFF", wait 10 seconds and turn
power back "ON".
Check joystick connection.
Check battery connection and fuses.
SOLUTIONS
Check cables for damage or replace battery wiring
harness.
Replace batteries
Check each battery and replace if needed.
Check all connections and housings for damage. If
you have a blown fuse, a new battery wiring har-
ness must be purchased.
Check battery voltage and replace if necessary.
Check battery cable connections, may have
vibrated loose when driving on rough terrain.
Replace battery wiring harness.
Recharge or replace battery.
® ™
Pronto M91 and M94