ABB ACQ580 - Page 345

Fault tracing 341
A2B4 Short circuit Short-circuit in motor cable(s)
or motor.
Check motor and motor cable for
cabling errors.
Check motor and motor cable
(including phasing and delta/star
connection).
Check for an earth fault in motor or
motor cables by measuring the
insulation resistances of motor and
motor cable. See chapter Electrical
installation, section Checking the
insulation of the assembly in the
Hardware manual of the drive.
Check there are no power factor
correction capacitors or surge
absorbers in motor cable.
A2BA IGBT overload Excessive IGBT junction to
case temperature. This
warning protects the IGBT(s)
and can be activated by a short
circuit in the motor cable.
Check motor cable.
Check ambient conditions.
Check air flow and fan operation.
Check heatsink fins for dust pick-up.
Check motor power against drive
power.
A3A1 DC link overvoltage Intermediate circuit DC voltage
too high (when the drive is
stopped).
Check the supply voltage setting
(parameter 95.01 Supply voltage). Note
that the wrong setting of the parameter
may cause the motor to rush
uncontrollably, or may overload the
resistor.
Check the supply voltage.
If the problem persists, contact your
local ABB representative.
A3A2 DC link undervoltage Intermediate circuit DC voltage
too low (when the drive is
stopped).
A3AA DC not charged The voltage of the intermediate
DC circuit has not yet risen to
operating level.
A490 Incorrect temperature
sensor setup
Temperature cannot be
supervised due to incorrect
adapter setup.
Check the settings of temperature
source parameters 35.11 and 35.21.
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 board temperature is
too high.
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 board replacement.
Code
(hex)
Warning / Aux. code Cause What to do