Schneider Electric ALTIVAR 28 Variable Speed Drive

This fault indicates an internal hardware failure within the drive controller itself. It is a critical error preventing normal operation and typically points to a component malfunction that cannot be resolved through software or external adjustments.

This fault indicates an internal malfunction within the drive controller, potentially stemming from environmental electromagnetic interference or an improper connection/disconnection of the local control option while powered. Ignoring this can result in total drive failure and loss of control.

This fault indicates an overcurrent condition in the drive controller, often caused by a ramp that is too short, excessive inertia or load, or a mechanical obstruction affecting the motor. If unresolved, this can lead to severe damage to the motor or the drive's power components.

This fault indicates that the drive controller's internal temperature or its I²t thermal model has exceeded safe operating limits, leading to an overheat condition. Continuous operation in this state will cause irreversible damage to the drive's sensitive electronic components.

This fault signifies that the motor's I²t thermal protection has tripped due to a prolonged overload condition, indicating excessive current draw over an extended period. Sustained motor overload will lead to winding insulation breakdown and permanent motor damage.

This fault indicates a loss of one or more phases in the connection between the drive controller's output and the motor. This condition can lead to single-phasing of the motor, causing excessive current in the remaining windings and potential motor damage or overheating.

This fault occurs when the DC bus voltage within the drive controller is too high, either during steady-state operation or acceleration, usually caused by an excessively high incoming line voltage. High DC bus voltage can stress and damage the drive's internal capacitors and power semiconductors.

This fault occurs when the DC bus voltage rises above its safe limit during motor deceleration, typically due to kinetic energy being regenerated back to the drive from a sudden stop or an overhauling load. Without proper energy dissipation, this can damage the drive's DC bus components.

This fault indicates a loss of one or more phases in the incoming AC line supply to the drive controller, often caused by incorrect wiring, a blown input fuse, or a transient power fault. Operating a three-phase drive on a single-phase supply can also trigger this. Prolonged operation with missing phases can damage the drive's input rectifier.

This fault signals a short-circuit or ground fault condition detected at the output of the drive controller or within the motor windings. This is a critical fault that can cause immediate and significant damage to the drive's output stage if not addressed.

This fault signifies an issue with the serial communication link to the drive controller, such as an incorrect connection or a break in communication. This prevents the drive from receiving commands or sending status information via the serial interface.

This fault indicates that the input voltage supplied to the drive controller is too low, possibly due to a transient voltage dip, a persistent low line voltage, or a damaged internal component like a load resistor. Undervoltage can cause erratic drive behavior, loss of motor control, and potential component stress.

This fault occurs during the auto-tuning process, signifying an incompatibility with the connected motor, such as a special motor type or incorrect power sizing relative to the drive. This prevents the drive from accurately optimizing its control parameters, leading to suboptimal performance.