Fault tracing 569
Warning messages
Note: The list also contains events that only appear in the Event log.
Code
(hex)
Warning Cause What to do
A2A1 Current calibration Current offset and gain
measurement calibration will
occur at next start.
Informative warning. (See parameter
99.13 ID run requested.)
A2B1 Overcurrent Output current has exceeded
internal fault limit.
Check motor load.
Check acceleration times in parameter
group 23 Speed reference ramp (speed
control), 26 Torque reference chain
(torque control) or 28 Frequency
reference chain (frequency control). Also
check parameters 46.01 Speed scaling,
46.02 Frequency scaling and 46.03
To rqu e scal ing .
Check motor and motor cable (including
phasing and delta/star connection).
Check there are no contactors opening
and closing in motor cable.
Check that the start-up data in parameter
group 99 corresponds to the motor rating
plate.
Check that there are no power factor
correction capacitors or surge absorbers
in motor cable.
Check encoder cable (including
phasing).
Check the auxiliary code (format XXXY
YYZZ). With parallel-connected inverter
modules, “Y YY” specifies through which
BCU control unit channel the fault was
received. “ZZ” indicates the phase that
triggered the fault (0: No detailed
information available, 1: U-phase, 2: V-
phase, 4: W-phase, 3/5/6/7: multiple
phases).
A2B3 Earth leakage
Programmable fault: 31.20
Earth fault
Drive has detected load
unbalance typically due to
earth fault in motor or motor
cable.
Check there are no power factor
correction capacitors or surge absorbers
in motor cable.
Check for an earth fault in motor or motor
cables by measuring the insulation
resistances of motor and motor cable.
Try running the motor in scalar control
mode if allowed. (See parameter 99.04
Motor control mode.)
If no earth fault can be detected, contact
your local ABB representative.
A2B4 Short circuit Short-circuit in motor cable(s)
or motor.
Check motor and motor cable for cabling
errors.
Check there are no power factor
correction capacitors or surge absorbers
in motor cable.
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