Fault tracing 569Firmware warning 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.)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 heat sink fins for dust pick-up.Check motor power against drive power.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 may overload the brakechopper or resistor.Check the supply voltage.With A3A1 or A3A2 on parallel-connected inverter modules, the auxiliarycode indicates the affected module. Theformat of the code is 0000X XX00, where“XXX” specifies the channel on the BCUcontrol unit.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.A480 Motor cable overload Calculated motor cabletemperature has exceededwarning limit.Check the settings of parameters 35.61and 35.62.Check the dimensioning of the motorcable in regard to required load.A490 Incorrect temperaturesensor setupSensor type mismatch Check the settings of temperature sourceparameters 35.11 and 35.21 against91.21 and 91.24.Faulty wiring between anencoder interface module andthe temperature sensor.Check the wiring of the sensor.The auxiliary code identifies the interfacemodule. (0 = Module 1, 1 = Module 2).
