Vacon NX All-in-One Application

A hardware trip (S1) has detected excessively high current (>4 times nominal current) in the motor cable, potentially due to a sudden heavy load, a short circuit in the motor cables, or an incorrectly matched motor. Other subcodes (S3, S4) indicate current controller supervision issues or an exceeded user-configured limit.

An input line phase is missing, indicating a loss of one or more phases in the AC supply to the drive. This could be due to an open circuit in the supply cabling, a blown fuse, or a power distribution issue. Operating with a missing phase can damage the drive's input rectifier.

The drive's current measurement system detects no current flowing in one of the motor phases. This typically signifies an open circuit in the motor's power path, potentially due to a disconnected motor cable, a break in the motor winding, or a faulty connection at the motor or drive terminals. This can lead to the motor operating unevenly or failing to run.

This fault indicates an issue with the dynamic braking circuit. Possible causes include the absence of a brake resistor, a physical break in the brake resistor element, or a malfunction within the brake chopper itself. This condition prevents the drive from effectively dissipating regenerative energy generated by the motor during deceleration.

The temperature within the power unit heatsink or on the power board has fallen below safe operating limits, specifically below -10 °C (14 °F). This extremely cold condition can affect the performance and lifespan of electronic components.

The heatsink temperature of the power unit has exceeded safe operating limits, specifically over 90 °C (194 °F), or 77 °C (170.6 °F) for NX_6 and FR6 series. An alarm triggers when the temperature surpasses 85 °C (185 °F), or 72 °C (161.6 °F). This indicates inadequate cooling or excessive internal heat generation, which can lead to component damage.

The motor has stalled, meaning it is commanded to run but is not rotating, or its speed is significantly below commanded speed due to excessive load. This can result from mechanical binding, an overloaded application, or an issue within the motor itself. Sustained stalling can cause severe motor overheating and damage.

The motor's temperature has exceeded its safe operating limits, primarily due to an excessively heavy load on the motor. This fault can also occur if the drive's internal temperature model parameters are incorrectly configured for the specific motor. Continuous operation at high temperatures significantly degrades motor winding insulation and can lead to premature failure.

The motor underload protection has tripped, indicating that the motor's current draw is significantly lower than expected given its operating conditions and commanded speed. This typically suggests a loss of mechanical load, a broken coupling, or an issue with the driven equipment. Running under severe underload can sometimes lead to inefficient operation or potential runaway conditions in certain applications.

A hardware trip (S1) has detected the DC-link voltage exceeding its safe limits. This can be caused by a deceleration time that is too short, high voltage spikes on the input power supply, or a rapid Start/Stop sequence. Subcode S2 indicates issues with overvoltage control supervision.

This fault indicates an internal operation malfunction or a defective component within the drive's microprocessor system. It suggests an issue with the drive's core control logic or hardware, potentially leading to unstable operation.

This fault occurs when the drive's start-up sequence is prevented, often because a run request signal is active (ON) while a new application program is being downloaded or immediately after. This prevents unintended motor operation during configuration.

The option board's thermistor input has detected an increase in motor temperature, indicating potential overheating. This can also be triggered by a faulty thermistor connection or if the input is left open when not in use.

The drive's current measurement system has detected that the sum of the motor phase currents is not zero, indicating a leakage current to earth. This is typically caused by an insulation malfunction in the motor cables or within the motor windings itself, posing a risk of electrical shock or further equipment damage.

This fault indicates that the Safe Disable input on the OPTAF board has opened, activating the safe torque off function. This is a safety feature to prevent unintended motor startup or operation.

The IGBT Inverter Bridge's over-temperature protection has activated, indicating excessively high short-term overload current. This typically points to the motor drawing too much current, potentially due to incorrect sizing or heavy load conditions, causing the inverter's power semiconductors to overheat.

This fault indicates that a message sent on the CAN bus was not acknowledged by any other device. This typically points to an issue with the bus configuration, a missing device, or an addressing conflict.

This fault indicates a problem with the encoder signals, with subcodes specifying whether channel A (1), channel B (2), or both channels (3) of Encoder 1 are missing. Other causes include reversed encoder direction (4) or a missing encoder board (5). This directly impacts speed and position feedback for the drive.

This fault occurs when an option board or the main power unit has been replaced with a device of a different type or power rating. The drive detects a mismatch in hardware configuration, requiring re-parameterization to ensure correct operation.

This fault is triggered when an option board of a different type has been added to the drive. The drive's system recognizes new hardware that requires configuration, causing a mismatch until parameters are updated.

This fault indicates that a division by zero error has occurred within the drive's application program during execution. This signifies a mathematical instability or an incorrect calculation in the custom application code.

This fault indicates that the internal charging switch is detected as open when a START command is issued to the drive. This could be due to an operational malfunction or a defective component within the charging circuit, preventing the DC bus from charging properly.

The analog input configured for a 4-20 mA signal range is receiving a current signal below 4mA. This suggests a problem in the current loop, such as a broken or loose control cable, or a failure of the signal source itself, preventing accurate control or feedback.

This fault indicates that a digital input configured as an external fault trigger has been activated. The fault originates from an external device connected to the drive, signaling a critical condition outside the drive's internal diagnostics.

This fault signifies a defective communication link between the drive and its control panel or NCDrive software. This prevents command input, monitoring, and parameter adjustments from the user interface.

This fault indicates a defective data connection between the fieldbus master and the drive's fieldbus option board. This prevents the drive from receiving commands or transmitting data via the fieldbus network, disrupting integrated control.

This fault points to a defective option board or an issue with the slot into which the board is installed. This hardware malfunction can prevent proper function of expansion modules.

The drive has detected that a monitored temperature has exceeded its programmed limit. Possible causes include a disconnected temperature sensor, a short circuit in the sensor wiring, or an actual excessive temperature rise in the equipment.

The motor identification run has failed. This can occur if the run command was removed prematurely during the process, the motor is not properly connected to the AC drive, or if there is mechanical load present on the motor shaft during the identification procedure.

This fault occurs when the actual status of the mechanical brake does not match the drive's control signal. This mismatch indicates a problem with the brake mechanism itself or its feedback system, potentially leading to uncontrolled movement or inability to stop.

Communication between the Master and Follower drives has been lost via SystemBus or CAN. This indicates a broken communication link, preventing coordinated operation between the units.

An emergency stop signal has been received from an option board, immediately halting drive operation for safety reasons. This indicates that the emergency stop circuit has been activated, requiring investigation into its status.

This fault indicates a failure in the coolant circulation system of a liquid-cooled drive. This can lead to overheating if not addressed, as the drive relies on the external cooling system for heat dissipation.

The measured motor speed deviates significantly from the commanded speed reference. For Permanent Magnet Synchronous (PMS) motors, this can also indicate that the motor has exceeded its pull-out torque, leading to loss of synchronization.

The drive's run enable signal is currently in a low state, preventing the drive from starting or continuing operation. This signal is typically controlled by external safety interlocks or control logic.

An emergency stop command has been received either through a digital input or via the fieldbus network. This safety mechanism instantly halts the drive and requires a system reset before further operation is permitted.

This fault indicates that the drive's main input power switch is open, preventing power from reaching the drive. This typically refers to the external disconnect switch or circuit breaker supplying the drive.

This fault indicates an internal issue such as a defective component or a short-circuit/overload in the brake resistor circuit. If accompanied by Fault 1 (Overcurrent), it suggests a problem with the motor cable or the motor itself, leading to saturation conditions within the drive's output stage.

This fault has been triggered by a digital input, as configured by parameter P2.2.7.33, indicating a problem within the active filter unit. This requires investigation of the active filter's operational status and inputs.

This fault code is generated when the drive is configured in a Master Follower function and one or more of the connected follower drives experience a fault condition. This drive reports the fault state of another drive in the system. The root cause lies within the specific follower drive that tripped to fault.

This fault indicates a general system malfunction or a defective internal component. Subcodes provide more specific details, such as issues with the charging switch (S7), lack of power to the driver card (S8), or communication problems within the power unit for transmission (S9), trip signals (S10), or measurement data (S11).

The DC-link voltage is lower than its operational limits during run, specifically subcode S1 indicates the DC-link is too low. This condition can be caused by an insufficient supply voltage, an internal AC drive fault, a defective input fuse, or an external charge switch that is not closed. Subcodes S2 (No data from power unit) and S3 (Undervoltage control supervision) also relate to general undervoltage conditions.