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 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 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.
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.
32 311 Fan cooling The fan speed does not
agree to the speed refer-
ence accurately, but the
drive operates correctly.
This fault shows only in the
MR7 and in the drives that
larger than MR7.
Reset the fault and restart the
drive. Clean or replace the fan.
312 Fan cooling The fan life time (that is,
50,000 h) is complete.
Replace the fan and reset the life
time counter of the fan.
33 320 Fire mode enabled The Fire mode of the drive is
enabled. The protections of
the drive are not used.
This alarm is reset automat-
ically when Fire mode is dis-
abled.
Do a check of the parameter set-
tings and the signals. Some of the
protections of the drive are disa-
bled.
VACON · 372 FAULT TRACING
11
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