ABB ACS560 Quick Installation And Start-Up Manual page 115

Code Warning/Aux code
(hex) (aux code visible
only on assistant
control panel and
drive composer)
A794 BR data
A79C BC IGBT excess
temperature
A7AB Built in/Extension I/O
configuration failure
A7A2 Mechanical brake
opening failed
A7C1 FBA A communica-
tion
A7CE EFB comm loss
A7EE Panel loss
A88F Cooling fan
A8A0 AI supervision
0001 – AI1 less minimum
0002 – AI1 greater maximum
A8A1 RO life warning
0001 – Relay output 1
0002 – Relay output 2
A8A2 RO toggle warning
0001 – Relay output 1
0002 – Relay output 2
A8B0 Signal supervision 1
Cause
No brake resistor data.
Brake chopper IGBT temperat-
ure exceeded internal warning
limit.
The I/O built in/extension module
is not connected to the device
properly.
Status of mechanical brake ac-
knowledgment is not as expec-
ted during brake open.
Cyclical communication between
drive and fieldbus adapter mod-
ule A or between PLC and field-
bus adapter module A is lost.
Communication lost in embed-
ded fieldbus (EFB).
Communication lost between
control panel or PC tools and
drive.
Maintenance timer limit ex-
ceeded.
Analog signal is beyond limits.
0003 – AI2 less minimum
0004 – AI2 greater maximum
The relay has changed states
more than the recommended
number of times.
0003 – Relay output 3
The relay output is changing
states faster than recommended.
0003 – Relay output 3
Warning generated by the signal
supervision function 1.
Diagnostics 115
What to do
Check resistor data settings.
Let chopper cool down. Check ambient
temperature, cooling fan, air flow, cabinet
cooling, resistor overload protection function
settings, chopper resistor value, braking
cycle and supply voltage.
Make sure that the I/O built in/extension
module is connected to the device.
Check mechanical brake connection.
Check mechanical brake settings in paramet-
er group 44 Mechanical brake control.
Check that acknowledgment signal matches
the actual status of brake.
Check the status of fieldbus communication
and cable connections.
Check the status of the fieldbus master and
cable connections to the EIA-485/X5 termin-
als 29, 30 and 31 on the control unit.
Check PC tool or control panel connection.
Disconnect and reconnect the control panel.
Replace the drive cooling fan. Parameter
05.04 Fan on-time counter shows the run-
ning time of the cooling fan.
Check the signal level, input wiring, and the
defined limits.
Change the control board or stop using the
relay output.
Replace the signal connected to the relay
output source with a less frequently chan-
ging signal.
Check the source of the warning (parameter
32.07 Supervision 1 signal).
EN
HI