ABB ACS880-104

Fault tracing 599
71A3 Mechanical brake
opening failed
Programmable fault: 44.17
Brake fault function
Mechanical brake control fault.
Activated eg. if brake
acknowledgement is not as
expected during brake
opening.
Check mechanical brake connection.
Check mechanical brake settings in
parameter group 44 Mechanical brake
control.
Check that acknowledgement signal
matches actual status of brake.
71A5 Mechanical brake
opening not allowed
Programmable fault: 44.17
Brake fault function
Open conditions of mechanical
brake cannot be fulfilled (for
example, brake has been
prevented from opening by
parameter 44.11 Keep brake
closed).
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.
In an encoderless application,
the brake is kept closed by a
brake close request (either
from parameter 44.12 Brake
close request or from an
FSO-xx safety functions
module) against a modulating
drive for longer than 5
seconds.
Check the source signal selected by
parameter 44.12 Brake close request.
Check the safety circuits connected to
the FSO-xx safety functions module.
71B1 Motor fan
Programmable fault:
35.106 DOL starter event
type
No feedback received from
external fan.
Check external fan (or other equipment
controlled) by the logic.
Check settings of parameters
35.100…35.106.
7301 Motor speed feedback
Programmable fault: 90.45
Motor feedback fault
No motor speed feedback
received.
See A7B0 Motor speed feedback (page
580).
7310 Overspeed Motor is turning faster than
highest allowed speed due to
incorrectly set
minimum/maximum speed,
insufficient braking torque or
changes in load when using
torque reference.
Check minimum/maximum speed
settings, parameters 30.11 Minimum
speed and 30.12 Maximum speed.
Check adequacy of motor braking torque.
Check applicability of torque control.
Check need for brake chopper and
resistor(s).
Incorrect estimated speed. Check the status of motor current
measurement.
Perform a Normal, Advanced or
Advanced Standstill ID run instead of, for
example, a Reduced or Standstill ID run.
See parameter 99.13 ID run requested
(page 497).
7380 Encoder internal Internal fault. Contact your local ABB representative.
7381 Encoder
Programmable fault: 90.45
Motor feedback fault
Encoder feedback fault. See A7E1 Encoder (page 581).
73A0 Speed feedback
configuration
Speed feedback configuration
incorrect.
See A797 Speed feedback configuration
(page 577).
Code
(hex)
Fault Cause What to do