ABB ACS880-17 - Page 508

508 Fault tracing
A781 Motor fan
Programmable warning:
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.
A782 FEN temperature Error in temperature
measurement when
temperature sensor (KTY or
PTC) connected to encoder
interface FEN-xx is used.
Check that parameter 35.11 Temperature
1 source / 35.21 Temperature 2 source
setting 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 91.10
Encoder parameter refresh to validate
any changes in the settings.
Error in temperature
measurement when KTY
sensor connected to encoder
interface FEN-01 is used.
FEN-01 does not support temperature
measurement with KTY sensor. Use PTC
sensor or other encoder interface
module.
A783 Motor overload
Programmable warning:
35.56 Motor overload
action
Motor current is too high. Check for overloaded motor.
Adjust the parameters used for the motor
overload function (35.51…35.53) and
35.55…35.56.
A791 Brake resistor Brake resistor broken or not
connected.
Check that a brake resistor has been
connected.
Check the condition of the brake resistor.
A793 BR excess
temperature
Brake resistor temperature has
exceeded warning limit defined
by parameter 43.12 Brake
resistor warning limit.
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.
A794 BR data Brake resistor data has not
been given.
One or more of the resistor data settings
(parameters 43.08…43.10) is incorrect.
The parameter is specified by the
auxiliary code.
0000 0001 Resistance value too low. Check value of 43.10.
0000 0002 Thermal time constant not
given.
Check value of 43.08.
0000 0003 Maximum continuous power
not given.
Check value of 43.09.
A797 Speed feedback
configuration
Speed feedback configuration
has changed.
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: 92 Encoder 1
configuration, 02: 93 Encoder 2
configuration). “ZZZZ” indicates the
problem (see actions for each code
below).
Code
(hex)
Warning Cause What to do