ABB ACS480 Troubleshooting Manual page 14

Code
Warning / Aux. code
(hex)
AFF8 Motor heating active
B5A0 STO event
Programmable event:
31.22 STO indication
run/stop
D501 No more available
PFC motors
D502 All motors interlocked
D503 VSD controlled PFC
motor interlocked
Cause
Pre-heating is being performed Informative warning.
Safe torque off function is
active, ie. safety circuit
signal(s) connected to
connector STO is lost.
No more PFC motors can be
started because they can be
interlocked or in the Hand
mode.
All the motors in the PFC
system are interlocked.
The motor connected to the
drive is interlocked
(unavailable).
Fault tracing 13
What to do
Motor pre-heating is active. Current
specified by parameter 21.16 Pre-
heating current is being passed through
the motor.
Informative warning.
Check safety circuit connections. For
more information, see chapter The Safe
torque off function in the Hardware
manual of the drive and description of
parameter 31.22 STO indication run/stop
(page 244).
Check that there are no interlocked PFC
motors, see parameters: 76.81...76.84.
If all motors are in use, the PFC system
is not adequately dimensioned to handle
the demand.
Check that there are no interlocked PFC
motors, see parameters 76.81...76.84.
Motor connected to the drive is
interlocked and thus cannot be started.
Remove the corresponding interlock to
start the drive controlled PFC motor. See
parameters 76.81...76.84.