ABB ACS880 Firmware Manual page 674

674 Fault tracing
Code Event name /
(hex) Aux. code
A4B1 Excess
temperature
difference
A4F6 IGBT
temperature
A580 PU
communication
Cause
High temperature difference between
the IGBTs of different phases.
Drive IGBT temperature is excessive.
Communication errors detected
between the drive control unit and the
power unit.
What to do
Check motor power against drive
power.
See A5EA Measurement circuit
temperature (page 675).
Check the motor cabling.
Check cooling of drive module(s).
Check the auxiliary code (format XXXY
YYZZ). "XXX" indicates the source of
difference (0: Single module,
difference between phase IGBTs, 1:
parallelconnected modules,
minimum-maximum difference
between all IGBTs of all modules, 2:
parallel-connected modules,
minimum-maximum difference
between auxiliary power supply
boards). With parallel-connected
modules, "Y YY" specifies through
which BCU control unit channel the
highest temperature was measured.
"ZZ" specifies the phase (0: single
module, 1: U-phase [parallel
connection], 2: V-phase [parallel
connection], 3: W-phase [parallel
connection]).
Check ambient conditions.
Check air flow and fan operation.
Check heatsink fins for dust pick-up.
Check motor power against drive
power.
Check the connections between the
drive control unit and the power unit.
Check the auxiliary code (format XXXY
YYZZ). With parallel-connected
modules, "Y YY" specifies the affected
BCU control unit channel (0:
broadcast). "ZZ" specifies the error
source (8: Transmission errors in PSL
link [see "XXX"], 9: Transmitter FIFO
warning limit hit). "XXX" specifies the
transmission error direction and
detailed warning code (0:
Rx/communication error, 1:
Tx/Reed-Solomon symbol error, 2:
Tx/no synchronization error, 3:
Tx/Reed-Solomon decoder failures, 4:
Tx/Manchester coding errors).
Read the PSL2 data log. In Drive
Composer pro, check the time stamp
of the A580 fault. Load the log with
the same date and time. When the file
opens, click "Show fault log".
Check the power unit hardware.