Invacare Storm 4 Series, Service Manual

Page: 22 / 102

Invacare® Storm⁴ Series
Problem Other symptoms Possible cause Solution
Documentation
Batteries defective
(unstable voltage) Replace batteries
See 6.10.4 Removing
Batteries, page 75
Replace motor(s) See 6.6.1 Replacing
Motor-Gearbox
Unit, page 27
and
6.6.4 Replacing
Motor-Gearbox Unit
(Storm
4
X-plore), page
30
Mobility device
judders in drive mode
None
Drive motor(s)
defective
Replace carbon
brushes See 6.6.3 Replacing
or Rotating
Motor-Gearbox Unit
Sealing Ring (SSD
Motor), page 29
Mobility device pulls
to left or right
None Drive motors running
asymmetrically
Change programming
to synchronise motors See 6.9.13 Updating
software, page 66
Tyre visibly dented Not enough air in tyre Check air pressure,
replace inner tube
and/or valve if
necessary. See 6.9.12 Drive
program selection
after component
replacement, page 66
Error message does
not clear
None
Bad connections Check all connecting
cables. See 6.9.15 Cables,
page 68
Motor brake defective Measure internal
resistance of brakes,
replace motor if
defective.
Motors stop and start
again
None
Voltage decline Stop driving and allow
controls to cool down.
Motor runs but loses
power None High motor load
allows power module
to lower voltage Stop driving and allow
controls to cool down.
Motors stop and do
not start again None High motor load
allows power module
to lower voltage Leave mobility device
switched on and
let power module
operate. Charge
batteries overnight
with mobility device
switched on.
None
Fuse burnt out Check cabling and
replace fuse See 6.9.15 Cables,
page 68 and 6.9.14
Main Fuse, page 67
Motor defective Check carbon brushes
and replace if
necessary See 6.6.3 Replacing
or Rotating
Motor-Gearbox Unit
Sealing Ring (SSD
Motor), page 29
None
Measure internal
resistance of motor,
replace motor if
defective.
None Power module
defective Replace power module See 6.9.2 Replacing
LiNX power module
bracket, page 60
or 6.9.3 Replacing
True Trac Plus power
module, page 60
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