ABB ACS880 Firmware Manual page 356

356 Fault tracing
Code
Warning
(hex)
A6E5 AI parametrization
A780 Motor stall
Programmable warning:
31.24 Stall function
A781 Motor fan
Programmable warning:
35.106 DOL starter event
type
A782 FEN temperature
A791 Brake resistor
A793 BR excess
temperature
A794 BR data
A797 Speed feedback
configuration
A79B BC short circuit
Cause
The current/voltage hardware
setting of an analog input does
not correspond to parameter
settings.
Motor is operating in stall
region because of e.g.
excessive load or insufficient
motor power.
No feedback received from
external fan.
Error in temperature
measurement when
temperature sensor (KTY or
PTC) connected to encoder
interface FEN-xx is used.
Error in temperature
measurement when KTY
sensor connected to encoder
interface FEN-01 is used.
Brake resistor broken or not
connected.
Brake resistor temperature has
exceeded warning limit defined
by parameter 43.12 Brake
resistor warning limit.
Brake resistor data has not
been given.
Speed feedback configuration
has changed.
Short circuit in brake chopper
IGBT
What to do
Check the event log for an auxiliary code.
The code identifies the analog input
whose settings are in conflict.
Adjust either the hardware setting (on the
drive control unit) or parameter
12.15/12.25.
Note: Control board reboot (either by
cycling the power or through parameter
96.08 Control board boot) is required to
validate any changes in the hardware
settings.
Check motor load and drive ratings.
Check fault function parameters.
Check external fan (or other equipment
controlled) by the logic.
Check settings of parameters
35.100...35.106.
Check that parameter 35.11 Temperature
1 source / 35.21 Temperature 2 source
setting corresponds to actual encoder
interface installation.
FEN-01 does not support temperature
measurement with KTY sensor. Use PTC
sensor or other encoder interface
module.
Check that a brake resistor has been
connected.
Check the condition of the brake resistor.
Stop drive. Let resistor cool down.
Check resistor overload protection
function settings (parameter group
Brake chopper).
Check warning limit setting, parameter
43.12 Brake resistor warning
Check that the resistor has been
dimensioned correctly.
Check that braking cycle meets allowed
limits.
Check the resistor data settings
(parameters 43.08...43.10).
Use parameter 91.10 Encoder parameter
refresh) to validate any changes in the
settings.
Replace brake chopper if external. Drives
with internal choppers will need to be
returned to ABB.
Ensure brake resistor is connected and
not damaged.
43
limit.