ABB ACS480 Troubleshooting Manual page 9

08 Fault tracing
Code
Warning / Aux. code
(hex)
A6A7 System time not set
A6B0 User lock is open
A6D1 FBA A parameter
conflict
A6E5 AI parametrization
A6E6 ULC configuration
A780 Motor stall
Programmable warning:
31.24 Stall function
A792 Brake resistor wiring
Cause
System time is not set. Timed
functions cannot be used and
fault log dates are not correct.
The user lock is open.
The drive does not have a
functionality requested by a
PLC, or requested functionality
has not been activated.
The current/voltage hardware
setting of an analog input does
not correspond to parameter
settings.
User load curve configuration
error.
0000 Speed points inconsistent.
0001 Frequency points inconsistent.
0002 Underload point above
overload point.
0003 Overload point below
underload point.
Motor is operating in stall
region because of e.g.
excessive load or insufficient
motor power.
Brake resistor short circuit or
brake chopper control fault.
For drive frames R6 or larger.
What to do
Set the system time manually or connect
the panel to the drive to synchronize the
clock. If basic panel is used, synchronize
the clock through the EFB or a fieldbus
module.
Set parameter 34.10 Timed functions
enable to Disabled to disable the timed
functions if they are not used.
Close the user lock by entering an invalid
pass code in parameter
code. See section User lock
Check PLC programming.
Check settings of parameter groups
Fieldbus adapter (FBA).
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 unit 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 the auxiliary code (format XXXX
ZZZZ). "ZZZZ" indicates the problem
(see actions for each code below).
Check that each speed point (parameters
37.11...37.15) has a higher value than
the previous point.
Check that each frequency point
(37.20...37.16) has a higher value than
the previous point.
Check that each overload point
(37.31...37.35) has a higher value than
the corresponding underload point
(37.21...37.25).
Check motor load and drive ratings.
Check fault function parameters.
Check brake chopper and brake resistor
connection.
Ensure brake resistor is not damaged.
96.02 Pass
(page 151).
50