ABB ACS560 - Page 147

What to doCauseWarning/Aux
code (aux code
visible only on
assistant con-
trol panel and
drive composer)
Code
(hex)
Check mechanical brake connec-
tion.
Status of mechanical
brake acknowledgment is
not as expected during
brake open.
Mechanical
brake opening
failed
A7A2
Check mechanical brake settings in
parameter group 44 Mechanical
brake control.
Check that acknowledgment signal
matches the actual status of brake.
Check the status of fieldbus com-
munication and cable connections.
Cyclical communication
between drive and field-
bus adapter module A or
between PLC and fieldbus
adapter module A is lost.
FBA A communic-
ation
A7C1
Check the status of the fieldbus
master and cable connections to
the EIA-485/X5 terminals 29, 30 and
31 on the control unit.
Communication lost in
embedded fieldbus (EFB).
EFB comm lossA7CE
Check PC tool or control panel con-
nection. Disconnect and reconnect
the control panel.
Communication lost
between control panel or
PC tools and drive.
Panel lossA7EE
Replace the drive cooling fan. Para-
meter 05.04 Fan on-time counter
shows the running time of the
cooling fan.
Maintenance timer limit
exceeded.
Cooling fanA88F
Check the signal level, input wiring,
and the defined limits.
Analog signal is beyond
limits.
AI supervisionA8A0
0003 – AI2 less minimum0001 – AI1 less minimum
0004 – AI2 greater maximum0002 – AI1 greater maximum
Change the control board or stop
using the relay output.
The relay has changed
states more than the re-
commended number of
times.
RO life warningA8A1
0003 – Relay output 30001 – Relay output 1
0002 – Relay output 2
Diagnostics 147
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