Invacare Storm4 Service Manual page 16

Invacare® Storm4 Series
Problem
Mobility device
judders in drive mode
Mobility device pulls
to left or right
Error message does
not go out
Motors stop and start
again
Motor runs but loses
power
Motors stop and do
not start again
16
Other symptoms Possible cause
None
Batteries defective
(unstable voltage)
Drive motor(s)
defective
None
Drive motors running
asymmetrically
Tire visibly dented Not enough air in tire
None
Bad connections
Motor brake defective
None
Voltage decline
None
High motor load allows
power module to lower
voltage
None
High motor load allows
power module to lower
voltage
None
Fuse burnt out
None
Motor defective
None Power module
defective
Documentation
Solution
See 6.9.15 Removing
Replace batteries
batteries, page 46
Replace motor(s) See6.6.1 Replacing
drive unit, page 22 and
6.6.3 Replacing drive
unit (Storm4 X-plore),
page 23
Replace carbon brushes See 6.6.4 Replacing
or rotating motor/
gearbox unit sealing
ring (SSD motor), page
24
Change programming See 6.9.12 Updating
to synchronise motors software, page 45
Check air pressure, See 6.9.11 Drive
replace inner tube program selection
and/or valve if after component
replacement, page
necessary.
45
Check all connecting See 6.9.19 Cables, page
cables. 48
Measure internal
resistance of brakes,
replace motor if
defective.
Stop driving and allow
controls to cool down.
Stop driving and allow
controls to cool down.
Leave mobility device
switched on and let
power module operate.
Charge batteries
overnight with mobility
device switched on.
Check cabling and See 6.9.19 Cables,
replace fuse page 48 and 6.9.18
Main fuse, page 47
Check carbon brushes See 6.6.4 Replacing
and replace if or rotating motor/
necessary gearbox unit sealing
ring (SSD motor), page
24
Measure internal
resistance of motor,
replace motor if
defective.
Replace power module See 6.9.2 Replacing
LiNX power module
bracket, page 42
or 6.9.3 Replacing
True Trac Plus power
module, page 42
1533060-M