ABB ACS880 - Page 683

What to doCause
Event name /
Aux. code
Code
(hex)
Let chopper cool down.Brake chopper IGBT temperature has
exceeded internal warning limit.
BC IGBT
excess
temperature
A79C
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.Status of mechanical brake
acknowledgement is not as expected
during brake close.
Mechanical
brake closing
failed
A7A1
Check mechanical brake settings in
parameter group 44 Mechanical brake
control.
Check that acknowledgement signal
matches actual status of brake.
Check mechanical brake connection.Status of mechanical brake
acknowledgement is not as expected
during brake open.
Mechanical
brake opening
failed
A7A2
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
Open conditions of mechanical brake
cannot be fulfilled (for example, brake
Mechanical
brake opening
not allowed
A7A5
control (especially 44.11 Keep brake
closed).
has been prevented from opening by
parameter 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 hardware current/voltage setting
of an analog input (on an I/O
Extension AI
parameterization
A7AA
the I/O extension module (01:extension module) does not
correspond to parameter settings. parameter group 14 I/O extension
module 1, 02: 15 I/O extension module
2, 03: 16 I/O extension module 3). “YY”
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