ABB ACS860 - Page 354

354 Fault tracing
0008 Speed feedback configuration
has changed.
Use parameter 91.10 Encoder parameter
refresh to validate any changes in the
settings.
0009 No encoders configured to
encoder module
Configure the encoder in group 92
Encoder 1 configuration.
A798 Encoder option comm
loss
Encoder feedback not used as
actual feedback, or measured
motor feedback lost (and
parameter 90.45/90.55 is set to
Warning).
Check that the encoder is selected as
feedback source in parameter 90.41 or
90.51.
Check that the encoder interface module
is properly seated in its slot.
Check that the encoder interface module
or slot connectors are not damaged. To
pinpoint the problem, try installing the
module into a different slot.
0001 Failed answer to encoder
configuration message.
Contact your local ABB representative.
0002 Failed answer to adapter
watchdog disable message.
Contact your local ABB representative.
0003 Failed answer to adapter
watchdog enable message.
Contact your local ABB representative.
0004 Failed answer to adapter
configuration message.
Contact your local ABB representative.
0005 Too many failed answers inline
to speed and position
messages.
Contact your local ABB representative.
0006 DDCS driver failed. Contact your local ABB representative.
A79B BC short circuit Short circuit in brake chopper
IGBT
Replace brake chopper if external. Drives
with internal choppers will need to be
returned to ABB.
Ensure brake resistor is connected and
not damaged.
A79C BC IGBT excess
temperature
Brake chopper IGBT
temperature has exceeded
internal warning limit.
Let chopper cool down.
Check for excessive ambient
temperature.
Check for cooling fan failure.
Check for obstructions in the air flow.
Check the dimensioning and cooling of
the cabinet.
Check resistor overload protection
function settings (parameters
43.06…43.10).
Check minimum allowed resistor value
for the chopper being used.
Check that braking cycle meets allowed
limits.
Check that drive supply AC voltage is not
excessive.
A7A1 Mechanical brake
closing failed
Programmable warning:
44.17 Brake fault function
Status of mechanical brake
acknowledgement is not as
expected during brake close.
Check mechanical brake connection.
Check mechanical brake settings in
parameter group 44 Mechanical brake
control.
Check that acknowledgement signal
matches actual status of brake.
Code
(hex)
Warning Cause What to do