ABB ACS880 Firmware Manual page 680

680 Fault tracing
Code Event name /
(hex) Aux. code
A782 FEN
temperature
A783 Motor
overload
A791 Brake resistor
A793 BR excess
temperature
A794 BR data
0000 0001
0000 0002
0000 0003
A797 Speed
feedback
configuration
Cause
• 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.
Motor current is too high.
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.
Resistance value too low.
Thermal time constant not given.
Maximum continuous power not
given.
Speed feedback configuration has
changed.
What to do
• Check that parameter
Temperature 1 source
Temperature 2 source
corresponds to actual encoder
interface installation.
Check the settings of parameters
91.21 and 91.24. Check that the
corresponding module is
activated in parameters
91.11...91.14. Use parameter
Encoder parameter refresh
validate any changes in the
settings.
• FEN-01 does not support
temperature measurement with
KTY sensor. Use PTC sensor or
other encoder interface module.
Check for overloaded motor.
Adjust the parameters used for the
motor overload function (35.51...35.53)
and 35.55...35.56.
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
43 Brake chopper).
Check warning limit setting,
parameter 43.12 Brake resistor
warning limit.
Check that the resistor has been
dimensioned correctly.
Check that braking cycle meets
allowed limits.
One or more of the resistor data
settings (parameters 43.8...43.10) is
incorrect.
The parameter is specified by the
auxiliary code.
Check value of 43.10.
Check value of 43.8.
Check value of 43.9.
Check the auxiliary code (format XXYY
ZZZZ). "XX" specifies the number of
the encoder interface module (01:
91.11/91.12, 02: 91.13/91.14, "YY"
specifies the encoder (01:
1 configuration, 02: 93 Encoder 2
35.11
/ 35.21
setting
91.10
to
92 Encoder