Fault tracing 255Warning messagesCode(hex)Warning Cause What to doA2A1 Current calibration Current measurementcalibration will occur at nextstart.Informative warning.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,46.01 Speed scaling and 46.03 Torquescaling.Check motor and motor cable (includingphasing and delta/star connection).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.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.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.A3A1 DC link overvoltage Intermediate circuit DC voltagetoo high (when the drive isstopped).Check the supply voltage setting(parameter 95.01 Supply voltage). Notethat the wrong setting of the parametermay cause the motor to rushuncontrollably, or the overloading of thebrake chopper or resistor.Check the supply voltage.If the problem persists, contact your localABB representative.A3A2 DC link undervoltage Intermediate circuit DC voltagetoo low (when the drive isstopped).A3AA DC not charged The voltage of the intermediateDC circuit has not yet risen tooperating level.A3C1 DC voltage difference Difference in DC voltagesbetween parallel-connectedinverter modules.Contact your local ABB representative.
