ABB ACS560 Quick Installation And Start-Up Manual page 114

114 Diagnostics
Code Warning/Aux code
(hex) (aux code visible
only on assistant
control panel and
drive composer)
A7A1 Mechanical brake
closing failed
A7A5 Mechanical brake
opening not allowed
EN
A7AC I/O Module internal
HI
error
AFF5 Override new start
required
AFF8 Motor heating active
AFFE Override active
A780 Motor stall (Program-
mable warning: 31.24
Stall function)
A783 Motor overload
A784 Motor disconnect
A791 Brake resistor
A792 Brake resistor wiring
A793 BR excess temperat-
ure
1 - Resistance value too low
2 - Thermal time constant not given
Cause
Mechanical brake control warn-
ing.
Open conditions of mechanical
brake cannot be fulfilled.
Calibration data is not stored in
the I/O module. Analog signals
are not working with full accur-
acy.
Override new start required
Pre-heating is being performed
Override active warning.
Motor is operating in stall region.
Motor current is too high.
All three output phases are dis-
connected from motor.
Brake resistor fault.
Brake resistor short circuit or
fault in brake chopper.
Brake resistor temperature ex-
ceeded warning limit.
3 - maximum continuous power not given
What to do
Check mechanical brake connection. Check
mechanical brake settings in parameter
group 44 Mechanical brake control. Check
that acknowledgment signal matches the
actual status of the brake.
Check mechanical brake settings in paramet-
er group 44 Mechanical brake control.
Check that the acknowledgment signal (if
used) matches the actual status of the
brake.
Replace I/O module.
The safe torque off function was active and
has been reset while in Override. A new
start signal is required in order to start the
drive again.
Informative warning. Motor pre-heating is
active. Current specified by parameter 21.16
Pre-heating time delay is being passed
through the motor.
Informative warning. See parameter 70.02
Override enable.
Check motor load, drive ratings and fault
function parameters.
Check for overloaded motor
Adjust the parameters used for the motor
overload function. (35.51...35.53, 35.55,
35.56).
Check if parameter 95.26 enables the use
of a motor disconnect switch. If not, check
the following:
• All switches between drive and motor are
closed.
• All cables between drive and motor are
connected and secured.
If no issue was detected and drive output
was actually connected to motor, contact
ABB.
Check brake resistor.
Check brake chopper and brake resistor
connections.
Stop the drive. Let resistor cool down. Check
resistor overload protection function settings,
warning limits, resistor dimensioning and
braking cycle limits.