Fault
code
Fault ID
Fault name
Possible cause
How to correct the fault
30
520
Safety diagnostics
The STO inputs have a dif-
ferent status.
Do a check of the external safety
switch. Do a check of the input
connection and cable of the safety
switch.
Reset the drive and restart.
If the fault occurs again, ask
instructions from your nearest dis-
tributor.
521
Safety diagnostics
A malfunction in the ATEX
thermistor diagnostic. There
is no connection in the ATEX
thermistor input.
Reset the drive and restart.
If the fault occurs again, change
the option board.
522
Safety diagnostics
A short-circuit in the con-
nection of the ATEX ther-
mistor input.
Do a check of the ATEX thermistor
input connection.
Do a check of the external ATEX
connection.
Do a check of the external ATEX
thermistor.
523
Safety diagnostics
A problem occured in the
internal safety circuit.
Reset the drive and restart.
If the fault occurs again, ask
instructions from your nearest dis-
tributor.
524
Safety diagnostics
An overvoltage in the safety
option board
Reset the drive and restart.
If the fault occurs again, ask
instructions from your nearest dis-
tributor.
525
Safety diagnostics
An undervoltage in the
safety option board
Reset the drive and restart.
If the fault occurs again, ask
instructions from your nearest dis-
tributor.
526
Safety diagnostics
An internal malfunction in
the safety option board CPU
or in the memory handling
Reset the drive and restart.
If the fault occurs again, ask
instructions from your nearest dis-
tributor.
527
Safety diagnostics
An internal malfunction in
the safety function
Reset the drive and restart.
If the fault occurs again, ask
instructions from your nearest dis-
tributor.
530
Safe torque off
An emergency stop was
connected or some other
STO operation was activa-
ted.
When the STO function is activated,
the drive is in safe state.
FAULT TRACING
VACON · 343
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