ABB ACS880 Firmware Manual page 357

Code
Warning
(hex)
A79C BC IGBT excess
temperature
A7A1 Mechanical brake
closing failed
Programmable warning:
44.17 Brake fault function
A7A2 Mechanical brake
opening failed
Programmable warning:
44.17 Brake fault function
A7A5 Mechanical brake
opening not allowed
Programmable warning:
44.17 Brake fault function
A7AA FIO-11 AI
parametrization
A7AB Extension I/O
configuration failure
A7B0 Motor speed feedback
Programmable warning:
90.45 Motor feedback fault
Cause
Brake chopper IGBT
temperature has exceeded
internal warning limit.
Status of mechanical brake
acknowledgement is not as
expected during brake close.
Status of mechanical brake
acknowledgement is not as
expected during brake open.
Open conditions of mechanical
brake cannot be fulfilled (for
example, brake has been
prevented from opening by
parameter 44.11 Keep brake
closed).
The hardware current/voltage
setting of an analog input (on
an FIO-11 I/O extension
module) does not correspond
to parameter settings.
The I/O extension module
types and locations specified
by parameters do not match
the detected configuration.
No motor speed feedback is
received.
Fault tracing 357
What to do
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.
Check mechanical brake connection.
Check mechanical brake settings in
parameter group 44 Mechanical brake
control.
Check that acknowledgement signal
matches actual status of brake.
Check mechanical brake connection.
Check mechanical brake settings in
parameter group 44 Mechanical brake
control.
Check that acknowledgement signal
matches actual status of brake.
Check mechanical brake settings in
parameter group 44 Mechanical brake
control (especially 44.11 Keep brake
closed).
Check that acknowledgement signal (if
used) matches actual status of brake.
Adjust either the setting on the FIO-11
module or parameter 14.30/15.30/16.30.
(The hardware switch settings detected
by the control program are shown in
parameters 14.29, 15.29
Note: Control board reboot (either by
cycling the power or through parameter
96.08 Control board boot) is required to
validate any changes in the hardware
settings.
Check the event log for an auxiliary code.
The code indicates which I/O extension
module is affected.
Check the type and location settings of
the modules (parameters 14.01, 14.02,
15.01, 15.02, 16.01 and 16.02).
Check that the modules are properly
installed.
Check the event log for an auxiliary code.
See appropriate actions for each code
below.
and 16.29.)