Schneider Electric Altivar 312 Variable Frequency Drive

This alarm is displayed on the remote terminal when a button has been held down for an extended period (more than 10 seconds), or if the keypad is disconnected. It suggests a physical issue with the terminal's buttons, or a faulty connection of the keypad itself, which can prevent proper input.

This fault indicates that the drive's current configuration is inconsistent or has become corrupted, possibly due to the addition or removal of an option card without proper reconfiguration. An inconsistent configuration can lead to unpredictable drive behavior or prevent it from operating correctly, posing a risk to the application.

This fault occurs when a configuration loaded into the drive, typically via a serial link, is inconsistent or corrupt. This means the drive cannot properly interpret or apply the loaded settings, which will prevent it from functioning correctly and could lead to operational errors.

This fault indicates a detected communication problem on the CANopen network. It means the drive is unable to send or receive data from other devices on the bus, leading to loss of control or monitoring via CANopen.

This error occurs on the remote display terminal, indicating a communication timeout (50 ms) after 20 attempts to establish or maintain communication with the drive. This typically points to a faulty connection between the terminal and the drive, or incorrect communication settings, leading to a loss of display functionality and control.

This is a generic fault code displayed on the remote terminal, indicating an unspecified internal error detected within its CPU or associated components. It typically signifies a hardware malfunction or a critical internal processing error that prevents normal operation of the terminal.

This read-only fault code indicates a communication problem on an installed option card (e.g., a communication card). The exact nature of the fault depends on the specific network card. It means the drive cannot communicate correctly over the specified network, leading to a loss of external control, monitoring, or parameter access via that network.

This fault indicates a problem with the drive's internal capacitor precharge circuit, typically related to the precharge relay control or a damaged precharge resistor. The precharge circuit is vital for safely charging the DC bus capacitors upon power-up. If unresolved, the drive cannot power up correctly and will remain inoperable.

An internal memory fault has been detected within the drive's EEPROM. The EEPROM stores critical parameters and settings for the drive's operation. This fault suggests potential data corruption or a hardware issue with the memory chip. Unresolved, this can lead to loss of settings, unpredictable behavior, or drive failure.

An external fault has been triggered, typically by a digital input signal from an external safety device or process interlock. This indicates a condition outside the drive's internal control that requires attention, such as an emergency stop, a limit switch activation, or another process safety interlock. The drive will stop operation to ensure safety.

This is a severe internal hardware fault where the drive cannot identify its own rating. This indicates a critical issue within the drive's core electronics or firmware. If left unresolved, the drive cannot operate safely or correctly and may be permanently damaged.

This internal fault indicates an issue with the Human Machine Interface (HMI) card, such as it not being recognized, being incompatible, or the display being absent. While the drive might still be functional, the lack of a working HMI prevents local monitoring, parameter adjustment, and control, hindering operation and troubleshooting.

This internal fault indicates an issue with the drive's internal EEPROM memory. Similar to EEF, this points to potential data corruption or a hardware failure within the non-volatile memory storing operational parameters. Such a fault can compromise drive stability, lead to incorrect settings, or cause operational failure.

This internal fault signifies a problem with the drive's industrial-grade EEPROM. This specific memory component is critical for robust and reliable operation, storing industrial-specific configurations and data. A fault here indicates a serious internal hardware issue that can compromise drive stability and data integrity, leading to operational failure.

This fault occurs when the drive detects a loss of the 4-20 mA analog input signal, which is typically used for speed reference or feedback. This usually means a broken wire, a disconnected sensor, or a faulty analog signal source, causing the drive to lose its command reference and potentially stop or operate incorrectly. It can also be referred to as APL (4-20mA Loss).

This fault indicates that the current drawn by the motor has exceeded the drive's maximum permissible limit. Common causes include incorrect drive or motor parameters, excessive mechanical load, or a mechanical locking of the driven equipment. An overcurrent condition can quickly damage both the motor windings and the drive's output power stage (IGBTs).

This fault indicates that the internal temperature of the drive has exceeded its safe operating threshold. Common causes include inadequate cooling due to blocked ventilation, a faulty cooling fan, high ambient temperatures, or sustained operation at current levels close to the drive's maximum rating. Persistent overheating can lead to premature failure of internal components.

This fault indicates that the motor is drawing excessive current, exceeding its thermal protection limits. This can be caused by a mechanical overload on the motor or incorrect configuration of the motor's thermal current parameter (ItH) or stator resistance (rSC). Prolonged operation under overload can lead to motor winding damage or premature failure.

This fault signifies a loss of one or more phases in the power supply to the motor from the drive's output. Common causes include loose or broken motor connections, an open output contactor, or incorrect motor sizing/connection resulting in current instability. Operating with a phase loss can lead to motor overheating, reduced efficiency, and eventual failure.

This fault indicates that the incoming line voltage supply to the drive has exceeded the drive's maximum permissible limits. This can be due to an inherently high supply voltage or transient disturbances on the line. Sustained overvoltage can lead to damage to the drive's input rectifier and DC bus components.

The DC bus voltage inside the drive has exceeded its safe operating limit. This is most commonly caused by regenerative energy from the motor, particularly during rapid deceleration of high-inertia loads, or by an excessively high incoming line voltage. Unresolved overvoltage can lead to damage to the drive's internal power components.

This fault occurs when one or more phases of the incoming power supply to the drive are lost or are significantly unbalanced, typically detected when the drive is under load. Potential causes include blown input fuses, incorrect wiring (e.g., 3-phase drive on a single-phase supply), or an unbalanced line. Operating with input phase loss can damage the drive's input rectifier and lead to erratic performance.

This fault indicates an electrical short circuit between motor phases, from a phase to ground, or a significant ground leakage current at the drive's output. This is an extremely dangerous condition that can cause severe damage to the drive's output transistors (IGBTs) if not immediately resolved, potentially leading to drive destruction.

This fault signals an interruption in communication on the Modbus bus, preventing the drive from exchanging data with a Modbus master or remote display terminal. Causes often include physical bus issues or a disconnected remote display terminal when HMI command is enabled. This results in a loss of external control, monitoring, or parameter access.

The motor speed has exceeded its commanded or permissible limit, often due to an unstable control loop, an excessive regenerative load, or a mechanical runaway condition. This fault is critical as it can lead to mechanical damage to the driven equipment, create safety hazards, and result in a complete loss of control over the motor.

This fault indicates that the incoming line supply voltage to the drive has dropped below its safe operating threshold, or there is an internal issue with the drive's precharge resistor. This can be caused by insufficient line supply, transient voltage dips, or a damaged internal component. An undervoltage condition will cause the drive to trip to protect its internal circuitry and ensure stable operation.

This fault indicates an issue with the motor's brake control, either because the brake release current was not reached or the brake engage frequency threshold was not properly set while brake control was assigned. This can prevent the motor from starting or stopping correctly, leading to potential mechanical damage or uncontrolled movement.

This error signifies that the remote display terminal detects an incompatibility between its own brand/model and that of the connected drive. This typically means the remote terminal is not designed to work with the specific drive model, preventing proper communication and operation.

This error indicates that the remote display terminal has detected an internal Random Access Memory (RAM) anomaly. This points to a critical internal hardware malfunction within the display terminal's temporary data storage. The terminal's ability to process and display information will be impaired.

This error indicates that the remote display terminal has detected an internal Read-Only Memory (ROM) anomaly, typically identified by a checksum calculation failure. This points to a critical internal hardware malfunction within the display terminal's firmware storage. The terminal's basic functionality may be compromised.

This fault indicates that the drive's auto-tuning process was unsuccessful, preventing the drive from accurately measuring and optimizing motor parameters. This can occur if motor parameters are incorrectly entered, the process is interrupted, or there are issues with the motor wiring. Without successful auto-tuning, the drive's motor control performance may be suboptimal or lead to operational issues.