ABB ACS880 Firmware Manual page 173

Code Warning
(hex)
AE6C Semiconductor
temperature
AE6D DDCS controller
comm loss
Programmable
warning: 160.59
DDCS controller
comm loss action
AE73 Fan
AE74 Current diff 12 pulse
AE75 SD card
Cause
Diode temperature is
excessive due to eg. module
overload or fan failure.
(Control program generates
first a warning, then a fault.)
DDCS (fiber optic)
communication between the
supply unit and external
controller is lost.
Cooling fan stuck or
disconnected.
The DC busbar currents of 12-
pulse diode supply unit differ
too much (27% of nominal by
default).
Error related to SD card used
to store data.
1 No SD card
2 SD card write-protected
3 SD card unreadable
Fault tracing 173
What to do
Check ambient conditions.
Check air flow and fan operation.
Check heat sink fins for dust pick-up.
Check motor power against diode
supply unit power.
Check the auxiliary code to identify the
diode supply unit (15: single diode
supply unit or the first parallel-
connected diode supply unit, 16: the
second parallel-connected diode
supply unit).
Check status of controller. See the
user documentation of the controller.
Check settings of parameter group
160 DDCS communication.
Check cable connections. If necessary,
replace cables.
Check the setting of parameter
HW options word 1, bit 13.
Check the auxiliary code to identify the
fan. Code 0 denotes main fan 1. Other
codes (format XYZ): "X" specifies state
code (1: ID run, 2: normal). "Y" specifies
the index of the converter unit
connected to control unit (0...n). "Z"
specifies the index of the fan (1: Main
fan 1, 2: Main fan 2, 3: Main fan 3, 4:
Auxiliary fan 1, 5: Auxiliary fan 2, 6:
Auxiliary fan 3, 7: Filter fan 1, 8: Filter
fan 2, 9: Filter fan 3).
Note that modules are coded starting
from 0. For example, the code 101
means that Main fan 1 of module 1
(connected to control unit channel
V1T/V1R) has faulted during its ID run.
Check fan operation and connection.
Replace fan if faulty.
Check the DC fuses of DxT modules.
Check that there are no loose
connections in DC busbar.
Check that the inductances of the
windings are equal.
Contact your local ABB representative
if the limit needs to be changed.
Check the auxiliary code. See actions
for each code below.
Insert a compatible, writable
microSDHC memory card into the UMU
memory unit.
195.20