ABB +N5600 Firmware Instructions page 579

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 Extension AI
parameterization
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 I/O extension module) does
not correspond to parameter
settings.
Fault tracing 579
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.
Check the auxiliary code (format
XX00 00YY). "XX" specifies the number
of the I/O extension module (01:
parameter group 14 I/O extension
module 1, 02: 15 I/O extension module
03: 16 I/O extension module
specifies the analog input on the module.
For example, in case of I/O extension
module 1, analog input AI1 (auxiliary
code 0000 0101), the hardware
current/voltage setting on the module is
shown by parameter 14.29. The
corresponding parameter setting is
14.30. Adjust either the hardware setting
on the module or the parameter to solve
the mismatch.
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.
2,
3). "YY"