Vacon NX User Manual page 143

FAULT TRACING
Fault
Fault
code
25 Microprocessor
watchdog fault
26 Startup prevented Start-up of the drive has been prevented.
29 Thermistor fault
30 Safe Disable
warning
31 IGBT temperature
(hardware)
34 CAN bus
communication
35 Application
36 Control unit
37 Device changed
(same type)
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Table 55. Fault codes
Possible cause
- faulty operation
- component failure
Subcodes:
S1 = CPU watchdog timer
S2 = ASIC reset
Subcodes:
S1 = Prevention of accidental start-up.
S2 = Appears if START command is ON,
when returning to READY STATE after
Safe Disable has been active.
S30 = Appears if START command is ON
after system software has been
downloaded, after application has been
downloaded or application has been
changed.
The thermistor input of option board has
detected increase of the motor tempera-
ture.
Subcodes:
S1 =Thermistor input activated on
OPT-AF board
S2 = Special application
Safe disable inputs SD1 and SD2 are acti-
vated through the option board OPT-AF.
IGBT Inverter Bridge overtemperature
protection has detected too high a short-
term overload current.
Sent message not acknowledged.
Problem in application software.
NXS Control Unit can not control NXP
Power Unit and vice versa.
Option board or power unit changed.
New device of same type and rating.
Subcodes:
S1 = Control board
S2 = Control unit
S3 = Power board
S4 = Power unit
S5 = Adapter board and slot
vacon • 141
Correcting measures
Reset the fault and restart.
Should the fault re-occur,
contact your distributor.
Cancel prevention of start-up
if this can be done safely.
Check motor cooling and
loading.
Check thermistor connection
(If thermistor input of the
option board is not in use it
has to be short circuited).
Contact your distributor.
Check loading.
Check motor size.
Ensure that there is another
device on the bus with the
same configuration.
Contact your distributor. If
you are application
programmer check the
application program.
Change control unit.
Reset. Device is ready for
use.
Old parameter settings will
be used.
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