Fault
code
Fault ID Fault name Possible cause How to correct the fault
26 250 Startup prevented It is not possible to do a
startup of the drive. When
the Run request is ON, a
new software (a firmware or
an application), a parameter
setting or other file that
effects the operation of the
drive, is loaded to the drive.
Reset the fault and stop the drive.
Load the software and start the
drive.
29 280 Atex thermistor The ATEX thermistor tells
that there is an overtemper-
ature.
Reset the fault. Do a check of the
thermistor and its connections.
30 290 Safe Off The safe off signal A does
not let you to set the drive to
the READY state.
Reset the fault and restart the
drive.
Do a check of the signals from the
control board to the power unit and
the D connector.291 Safe Off The safe off signal B does
not let you to set the drive to
the READY state.
500 Safety configuration The safety configuration
switch was installed.
Remove the safety configuration
switch from the control board.
501 Safety configuration There are too many STO
option boards. It is possible
to have only 1.
Keep 1 of the STO option boards.
Remove the others. See the safety
manual.
502 Safety configuration The STO option board was
installed in an incorrect slot.
Put the STO option board into the
correct slot. See the safety man-
ual.
503 Safety configuration There is no safety configura-
tion switch on the control
board.
Install the safety configuration
switch on the control board. See
the safety manual.
504 Safety configuration The safety configuration
switch was installed incor-
rectly on the control board.
Install the safety configuration
switch into the correct position on
the control board. See the safety
manual.
505 Safety configuration The safety configuration
switch was installed incor-
rectly on the STO option
board.
Do a check of the installation of the
safety configuration switch on the
STO option board. See the safety
manual.
506 Safety configuration There is no communication
with the STO option board.
Do a check of the installation of the
STO option board. See the safety
manual.
507 Safety configuration The STO option board is not
compatible with the hard-
ware.
Reset the drive and restart it. If the
fault occurs again, ask instructions
from your nearest distributor.
FAULT TRACING VACON · 371
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