ABB ACS880 Firmware Manual page 598

598 Fault tracing
Code
Fault
(hex)
7184 Brake resistor wiring
7191 BC short circuit
7192 BC IGBT excess
temperature
71A2 Mechanical brake
closing failed
Programmable fault:
Brake fault function
71A3 Mechanical brake
opening failed
Programmable fault:
Brake fault function
Cause
Brake resistor short circuit or
brake chopper control fault.
Short circuit in brake chopper
IGBT.
Brake chopper IGBT
temperature has exceeded
internal fault limit.
Mechanical brake control fault.
Activated e.g. if brake
acknowledgement is not as
44.17
expected during brake closing.
Mechanical brake control fault.
Activated e.g. if brake
acknowledgement is not as
44.17
expected during brake
opening.
What to do
Check brake chopper and brake resistor
connection.
Ensure brake resistor is not damaged.
After correcting the cause of the fault,
reboot the control unit (using parameter
96.08 Control board boot) or by cycling
power.
Ensure brake resistor is connected and
not damaged.
Check the electrical specifications of the
brake resistor against the Hardware
manual.
Replace brake chopper (if replaceable).
After correcting the cause of the fault,
reboot the control unit (using parameter
96.08 Control board boot) or by cycling
power.
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 (parameter group
Brake chopper).
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.
43