Fault tracing 397
A79C
BC IGBT excess
temperature
Brake chopper IGBT
temperature has exceeded
internal warning limit.
Let chopper cool down.
Check for excessive ambient
temperature.
Check for cooling fan failure.
Check for obstructions in the air flow.
Check the dimensioning and cooling of
the cabinet.
Check resistor overload protection
function settings (parameters
43.06
…
43.10
).
Check minimum allowed resistor value
for the chopper being used.
Check that braking cycle meets allowed
limits.
Check that drive supply AC voltage is not
excessive.
A7AB Extension I/O
configuration failure
The I/O module is not
connected to the device or
parameterization conflict with
currently connected I/O-
module.
For example, if the drive is
connected to an I/O & Modbus
module and removed later, the
drive displays a warning if
connection between any of the
parameter and the configured
digital/analog output signal is
lost.
Make sure that the I/O module is
connected to the device and no
parameters are connected to non-
existing I/O parameters.
A7C1
FBA A communication
Programmable warning:
50.02
FBA A comm loss
func
Cyclical communication
between drive and fieldbus
adapter module A or between
PLC and fieldbus adapter
module A is lost.
Check status of fieldbus communication.
See user documentation of fieldbus
interface.
Check settings of parameter groups
50
Fieldbus adapter (FBA)
,
51 FBA A
settings
,
52 FBA A data in
and
53 FBA A
data out
.
Check cable connections.
Check if communication master is able to
communicate.
A7CE EFB comm loss
Programmable warning:
58.14
Communication loss
action
Communication break in
embedded fieldbus (EFB)
communication.
Check the status of the fieldbus master
(online/offline/error etc.).
Check cable connections to the
EIA-485/X5 terminals 29, 30 and 31 on
the control unit.
A7E1
Encoder
Programmable warning:
90.45
Motor feedback fault
Encoder error.
Check the auxiliary code. See below for
actions.
0001
Cable fault.
Check the encoder cable connection.
If the encoder was working previously,
check the encoder, encoder cable, and
encoder interface module for damage.
Code
(hex)
Warning / Aux. code
Cause
What to do
ACS380 FW.book Page 397 Friday, May 4, 2018 4:18 PM
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