ABB ACS880 Series Firmware Manual page 475

Code
Warning
(hex)
A4A1 IGBT overtemperature Estimated drive IGBT
A4A9 Cooling
A4B0 Excess temperature
A4B1 Excess temperature
difference
A4B2 PCB space cooling
A4F6 IGBT temperature
Cause
1 Thermistor broken
temperature is excessive.
Drive module temperature is
excessive.
Power unit module
temperature is excessive.
High temperature difference
between the IGBTs of different
phases.
Temperature difference
between ambient and drive
module PCB space is
excessive.
Drive IGBT temperature is
excessive.
Fault tracing 475
What to do
Contact an ABB service representative
for control unit replacement.
Check ambient conditions.
Check air flow and fan operation.
Check heatsink fins for dust pick-up.
Check motor power against drive power.
Check ambient temperature. If it exceeds
40 °C (104 °F), ensure that load current
does not exceed derated load capacity of
drive. See appropriate Hardware manual.
Check drive module cooling air flow and
fan operation.
Check inside of cabinet and heatsink of
drive module for dust pick-up. Clean
whenever necessary.
Check ambient conditions.
Check air flow and fan operation.
Check heatsink fins for dust pick-up.
Check motor power against drive power.
Check the auxiliary code (format XXXY
YYZZ). "Y YY" specifies through which
BCU control unit channel the fault was
received. "ZZ" specifies the location (1:
U-phase, 2: V-phase, 3: W-phase, 4: INT
board, 5: Brake chopper, 6: Air inlet, 7:
Power supply board, 8: du/dt filter (R8i)
or temperature switch (XT), 0FA:
Ambient temperature).
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: parallel-
connected modules, minimum-maximum
difference between all IGBTs of all
modules). With parallel-connected
modules, "Y YY" specifies through which
BCU control unit channel the fault was
received. "ZZ" specifies the phase (0:
single module, 1: U-phase [parallel
connection], 2: W-phase [parallel
connection], 3: W-phase [parallel
connection]).
Check the cooling fan inside the PCB
space.
With parallel-connected modules, check
the auxiliary code (format XXXY YYZZ).
"Y YY" specifies through which BCU
control unit channel the fault was
received.
Check ambient conditions.
Check air flow and fan operation.
Check heatsink fins for dust pick-up.
Check motor power against drive power.