ABB ACS860 - Page 348

348 Fault tracing
A491 External temperature
1
(Editable message text)
Measured temperature 1 has
exceeded warning limit.
Check the value of parameter 35.02
Measured temperature 1.
Check the cooling of the motor (or other
equipment whose temperature is being
measured).
Check the value of 35.13 Temperature 1
warning limit.
A492 External temperature
2
(Editable message text)
Measured temperature 2 has
exceeded warning limit.
Check the value of parameter 35.03
Measured temperature 2.
Check the cooling of the motor (or other
equipment whose temperature is being
measured).
Check the value of 35.23 Temperature 2
warning limit.
A4A0 Control board
temperature
Control unit temperature is
excessive.
Check the auxiliary code. See actions for
each code below.
(none) Temperature above warning
limit
Check ambient conditions.
Check air flow and fan operation.
Check heatsink fins for dust pick-up.
1 Thermistor broken Contact an ABB service representative
for control unit replacement.
A4A9 Cooling Drive module temperature is
excessive.
Check ambient temperature. If it exceeds
40 °C, 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.
A4B0 Excess temperature Power unit temperature is
excessive.
Check ambient conditions.
Check air flow and fan operation.
Check the setting of 31.36 Aux fan fault
function (if present).
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
(sensor connected to INT board X10), 7:
PCB compartment fan or power supply
board, 8: du/dt filter or temperature
switch (XT) (sensor connected to INT
board X7), 9: Sensor connected to INT
board X6, 0FA: Ambient temperature).
Code
(hex)
Warning Cause What to do