ABB ACS880 N5700 Series - Page 565

What to doCause
Event name /
Aux. code
Code
(hex)
Check that braking cycle meets
allowed limits.
Check brake chopper and brake
resistor connection.
Brake resistor short circuit or brake
chopper control fault.
Brake resistor
wiring
7184
Ensure brake resistor is not damaged.
After correcting the cause of the fault,
reboot the control unit (using
parameter 96.8 Control board boot)
or by cycling power.
Ensure brake resistor is connected and
not damaged.
Short circuit in brake chopper IGBT.BC short
circuit
7191
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 96.8 Control board boot)
or by cycling power.
Let chopper cool down.Brake chopper IGBT temperature has
exceeded internal fault limit.
BC IGBT
excess
temperature
7192
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
43 Brake chopper).
Check that braking cycle meets
allowed limits.
Check that drive supply AC voltage is
not excessive.
Check mechanical brake connection.Mechanical brake control fault.Mech brake
closing failed
71A2
Check mechanical brake settings in
parameter group 44 Mechanical brake
control.
Activated eg. if brake
acknowledgement is not as expected
during brake closing.
Check that acknowledgement signal
matches actual status of brake.
Check mechanical brake connection.Mechanical brake control fault.Mech brake
opening failed
71A3
Check mechanical brake settings in
parameter group 44 Mechanical brake
control.
Activated eg. if brake
acknowledgement is not as expected
during brake opening.
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
Mech brk
opening not
allowed
71A5
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.
In an encoderless application, the
brake is kept closed by a brake close
request (either from parameter 44.12
Fault tracing 565