Invacare TDX SP2 Service Manual page 43

Problem
Error message does
not disappear
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
1532486-L
Other symptoms Possible cause
None
Bad connections
Motor brake defective
None
Voltage decline
None
High motor load allows
power module to lower
the voltage
None High motor load allows
power module to lower
the voltage
None
Fuse burnt out
None
Motor defective
None Power module
defective
None Bad connections
None
Carbon brushes worn
(only applies for
motors without lifetime
brushes)
Clutch(es) defective
Bearing defective
Collector defective
Documentation
Solution
Check all connecting See 6.7.15 Checking
cables cable, page 38.
See 5.2 Testing motor
Measure internal
brake, page 11
resistance of brakes,
replace motor if and 6.4.7 Replacing
defective motor/gearbox unit,
page 23.
Stop driving and allow
electronics to cool
down
Stop driving and allow
electronics 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 6.7.15 Checking
replace fuse cable, page 38 and
6.7.13 Checking and
replacing main fuse,
page 37.
Check carbon brushes See 6.4.5 Replacing
and replace if carbon brushes, page
necessary 22.
Measure internal See 5.1 Testing
resistance of motor, motor, page 11
and 6.4.7 Replacing
replace motor if
motor/gearbox unit,
defective
page 23.
Replace power module See 6.7.1 Replacing
power module, page 31.
Switch mobility device See 6.7.15 Checking
off, wait 10 seconds, cable, page 38.
switch mobility device
on again. Check all
cabling.
Check carbon brushes See 6.4.5 Replacing
and replace if carbon brushes, page
necessary (only applies 22.
for motors without
lifetime brushes)
Replace clutch See 6.4.7 Replacing
motor/gearbox unit,
page 23.
Replace motor See 6.4.7 Replacing
motor/gearbox unit,
page 23.
Measure internal See 5.1 Testing
motor, page 11
resistance of motor,
and6.4.7 Replacing
replace motor if
defective motor/gearbox unit,
page 23.
Troubleshooting
43