Problem
Cause
Solution
Programming of Motor
Load Compensation is not
correct
Check programming and
make corrections if needed.
Check with manufacturer
for correct value.
Wheelchair veers to one
side
Programming of Load
Compensation is not
correct.
Check programming and
make corrections if needed.
Motors are not "balanced"
Check motor rpm. See
motor label for correct
value.
Tyre pressure or tyre size
left and right are different
Check tyre pressure and
tyre size (diameter).
Suspension "hardness" left
and right are different.
Check suspensions and
make sure left and right
side have identical
suspension rates.
Carrier is not "in balance"
due to mechanical flaws
Check for loose bolts,
cracked or worn frame
parts. Check height of
carrier left and right.
User weight is not in the
center of the wheelchair
Check position of user, see
if position can be improved.
If not possible use veer
compensation in program
to correct the steering.
Chair stops intermittently
High Voltage due to
overcharging or driving
down slopes with full
batteries (regenerative
braking). Check battery
voltage, drive down slope
at lower speed.
Worn carbon brushes
Check brushes, replace if
needed.
Speed Limit due to micro
switch
Check functioning of micro-
switch. Due to vibrations or
shocks it can temporarily
switch to Slowdown mode.
Castor wheels "wobble" at
higher speed
Tyre pressure too high.
Check tyre pressure and
decrease if needed. See
user manual for correct
value.
Too little load on the castor
wheels.
Modify seating setup if
possible or decrease tyre
pressure.
Troubleshooting
38
Service manual - Alex
