Fault tracing 349
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 brake
chopper or 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
Sensor type mismatch. 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.
A4A1 IGBT overtemperature Estimated drive IGBT
temperature is excessive.
Check ambient conditions.
Check air flow and fan operation.
Check heatsink fins for dust pick-up.
Check motor power against drive power.
Code
(hex)
Warning / Aux. code Cause What to do
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