Invacare Storm4 Series Service Manual page 17

Problem
Error message does
not go out
Motors stop and start
again
Motor runs but loses
power
Motors stop and do
not start again
Motors lose power
while driving
Motor judders or runs
irregularly, or only
one motor runs
Motors do not run
1555830-C
Other symptoms Possible cause
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
None
Bad connections
None
Carbon brushes worn
Bearing defective
Collector defective
None Bad connections
Fuse burnt out
Batteries defective
Wiring to power
module or remote
defective
Documentation
Solution
Check all connecting See 6.10.6 Cable
cables. Routing, page 48
Measure internal See 6.7.1 Replacing
resistance of brakes, Drive Unit, page 23
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 wiring and See 6.10.6 Cable
replace fuse Routing, page 48 and
6.10.5 Main Fuse,
page 46
Check carbon brushes See 6.7.2 Replacing
and replace if Carbon Brushes, page
necessary 24
Measure internal See 6.7.1 Replacing
resistance of motor, Drive Unit, page 23
replace motor if
defective.
Replace power module See 6.9.3 Replacing
Power Module, page
41
Switch mobility device See 6.10.6 Cable
off, wait 10 seconds, Routing, page 48
switch mobility device
on again. Check all
wiring.
Check carbon brushes See 6.7.2 Replacing
and replace if Carbon Brushes, page
necessary 24
Replace motor See 6.7.1 Replacing
Drive Unit, page 23
Measure internal See 6.7.1 Replacing
resistance of motor, Drive Unit, page 23
replace motor if
defective
Check all wiring See 6.10.6 Cable
Routing, page 48
Check wiring and See 6.10.6 Cable
replace fuse Routing, page 48 and
6.10.5 Main Fuse,
page 46
Replace batteries See 6.10 Batteries,
page 44
Check wiring See 6.10.6 Cable
Routing, page 48
Service
17