ABB ACS880 Firmware Manual page 683

Code Event name /
(hex) Aux. code
A79C BC IGBT
excess
temperature
A7A1 Mechanical
brake closing
failed
A7A2 Mechanical
brake opening
failed
A7A5 Mechanical
brake opening
not allowed
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
The hardware current/voltage setting
of an analog input (on an I/O
extension module) does not
correspond to parameter settings.
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
43.6...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
control.
Check that acknowledgement signal
matches actual status of brake.
Check mechanical brake connection.
Check mechanical brake settings in
parameter group
control.
Check that acknowledgement signal
matches actual status of brake.
Check mechanical brake settings in
parameter group
control (especially
closed). 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
module 1, 02:
2, 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.
Fault tracing 683
44 Mechanical brake
44 Mechanical brake
44 Mechanical brake
44.11 Keep brake
14 I/O extension
15 I/O extension module
3). "YY"