SERVICE MANUAL
Invacare
®
- STORM
4
MAX
28
PROBLEM
OTHER
SYMPTOMS
POSSIBLE
CAUSE
SOLUTION
Documentation
Motors stop
and start
again
None
Voltage decline
Stop journey and
allow electronics to
cool down.
Motor runs
but loses
power
None
High motor load
allows the power
module to lower
the voltage.
Stop journey and
allow electronics to
cool down.
Motors stop
and do not
start again
None
High motor load
allows the power
module to lower
the voltage.
Leave mobility aid
switched on and
let the power
module operate.
Charge batteries
overnight with
mobility aid
switched on.
None
Fuse burnt out
Check cabling and
replace fuse
See chapters 8.6 and 8.5
None
Motor defective
Check carbon
brushes and
replace if
necessary
See chapter 8.11.2.
Replacing the
motor
See chapter 8.11.1
None
Power module
defective
Replace power
module
See chapter 8.2.2.
Motors lose
power
during
journey
None
Bad connections Switch mobility aid
off, wait 10
seconds, switch
mobility aid on
again. Check all
cabling.
See chapter 8.6.
Motor
judders or
runs
irregularly,
or only one
motor runs
None
Carbon brushes
worn
Check carbon
brushes and
replace if
necessary
See chapter 8.11.2.
Bearing
defective
Replacing the
motor
See chapter 8.11.1.
Collector
defective
Replacing the
motor
See chapter 8.11.1