Fault tracing 473Warning messagesNote: The list also contains events that only appear in the Event log.Code(hex) Warning Cause What to doA2A1 Current calibration Current offset and gainmeasurement calibration willoccur at next start.Informative warning. (See parameter99.13 ID run requested.)A2B1 Overcurrent Output current has exceededinternal fault limit.Check motor load.Check acceleration times in parametergroup 23 Speed reference ramp (speedcontrol), 26 Torque reference chain(torque control) or 28 Frequencyreference chain (frequency control). Alsocheck parameters 46.01 Speed scaling,46.02 Frequency scaling and 46.03Torque scaling.Check motor and motor cable (includingphasing and delta/star connection).Check there are no contactors openingand closing in motor cable.Check that the start-up data in parametergroup 99 corresponds to the motor ratingplate.Check that there are no power factorcorrection capacitors or surge absorbersin motor cable.Check encoder cable (includingphasing).A2B3 Earth leakage Drive has detected loadunbalance typically due toearth fault in motor or motorcable.Check there are no power factorcorrection capacitors or surge absorbersin motor cable.Check for an earth fault in motor or motorcables by measuring the insulationresistances of motor and motor cable.Try running the motor in scalar controlmode if allowed. (See parameter 99.04Motor control mode.)If no earth fault can be detected, contactyour local ABB representative.A2B4 Short circuit Short-circuit in motor cable(s)or motor.Check motor and motor cable for cablingerrors.Check there are no power factorcorrection capacitors or surge absorbersin motor cable.A2BA IGBT overload Excessive IGBT junction tocase temperature. Thiswarning protects the IGBT(s)and can be activated by a shortcircuit 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.
