Fault tracing 417
A6E5 AI parametrization The current/voltage hardware
setting of an analog input does
not correspond to parameter
settings.
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.
A6E6 ULC configuration User load curve configuration
error.
Check the auxiliary code (format XXXX
ZZZZ). “ZZZZ” indicates the problem
(see actions for each code below).
0000 Speed points inconsistent. Check that each speed point (parameters
37.11…37.15) has a higher value than
the previous point.
0002 Underload point above
overload point.
Check that each overload point
(37.31…37.35) has a higher value than
the corresponding underload point
(37.21…37.25).
0003 Overload point below
underload point.
AFFE Override active Override active warning. Informative warning. See parameter
70.02 Override enable.
A780 Motor stall
(Programmable
warning: 31.24 Stall
function)
Motor is operating in stall
region.
Check motor load, drive ratings and fault
function parameters.
A783 Motor overload Motor current is too high. Check for overloaded motor
Adjust the parameters used for the motor
overload function. (35.51…35.53, 35.55,
35.56)
A791 Brake resistor Brake resistor fault. Check brake resistor.
A792 Brake resistor wiring Brake resistor short circuit or
fault in brake chopper.
Check brake chopper and brake resistor
connections.
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.
Code
(hex)
Warning / Aux. code
(aux code visible only
on assistant control
panel and drive
composer)
Cause What to do
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