Vacon 20 Compact

The frequency converter has detected a motor current exceeding four times the nominal current (>4*IN) in the motor cable. This condition typically results from a sudden heavy increase in motor load, a short circuit in the motor cables, or the use of an unsuitable motor for the application, posing a risk of damage to the motor or drive.

The DC-link voltage within the frequency converter has exceeded its internal safety limit. This commonly occurs when the motor regenerates energy back to the drive, especially if the deceleration time is set too short. High overvoltage peaks in the mains supply can also contribute to this fault.

The current measurement system has detected an excessive leakage current to ground during startup. This is a strong indication of an insulation failure, either in the motor cables connecting the drive to the motor or within the motor windings themselves.

A general system fault has occurred, indicating a possible component failure or faulty operation within the frequency converter. When this fault appears, it is crucial to consult the fault history for a specific subcode (Id xxx) to pinpoint the exact nature of the internal issue (e.g., Watchdog reset, SW stack overflow, HW stack overflow, Misalignment, Illegal op, PLL lost lock / Low CPU voltage, EEPROM Device, EEPROM Queue full, MPI communication dead or CRC errors, CPU load).

The DC-link voltage has dropped below the internal safety limit of the frequency converter. The most common causes include a supply voltage that is too low, or a power outage. In some cases, it could also indicate an internal fault within the frequency converter.

The current measurement system has detected an absence of current in one of the motor phases. This typically signifies an open circuit condition, which could be caused by a broken motor cable, a loose connection, or an internal fault within the motor windings.

The heat sink temperature of the frequency converter has fallen below -10 °C. This indicates that the ambient operating temperature is too low for the drive to function correctly or safely.

The frequency converter's heat sink is overheated, signifying insufficient cooling. Potential causes include blocked cooling airflow, high ambient temperature, accumulation of dust on the heatsink, or a switching frequency that is set too high in relation to the ambient conditions and motor load.

The motor stall protection has tripped, indicating that the motor is unable to rotate freely or maintain its commanded speed due to excessive load. This suggests a mechanical obstruction or an overload condition that prevents the motor from achieving motion.

The frequency converter's internal motor temperature model has detected that the motor is overheating. This fault primarily indicates that the motor is operating under an overload condition.

The motor underload protection has tripped, meaning the motor is drawing significantly less current than expected for its operation. This can indicate mechanical issues such as broken belts, disconnected couplings, or a process issue like a dry pump in fluid applications.

This fault indicates a parameter save error, suggesting a faulty operation or a component failure within the EEPROM memory. This may lead to corrupted or lost drive configuration settings.

This fault is triggered by faulty operation or a component failure within the microcontroller, indicating an unexpected halt or error in the drive's internal control processes.

The drive has detected that a magnetized motor is already rotating when a start command is issued. This is particularly relevant for Permanent Magnet (PM) motors which generate back electromotive force even when unpowered, making them appear 'active' during startup.

The thermistor input of an option board has detected an increase in the motor temperature beyond set limits, or there is an issue with the thermistor connection itself. This fault indicates a risk of motor overheating.

This fault signifies a problem with internal communication within the frequency converter, which can be caused by ambient electromagnetic interference or a defective hardware component.

The drive's internal application software is not operating correctly, indicating a potential software glitch or an incorrect configuration.

An overtemperature alarm is issued when the Insulated Gate Bipolar Transistor (IGBT) switch temperature within the drive exceeds 110 °C. This indicates excessive heat generation in the power stage, often due to heavy loading, an improperly sized motor, or inadequate cooling.

This fault indicates that the current at an analogue input (configured for a 4-20mA range) is below 4mA, or the voltage at an analogue input (configured for a 2-10V range) is below 2V. This typically points to a broken or loose control cable or a failure of the signal source device.

A digital input that has been configured as an external fault input has become active. This means an external device connected to this input has signaled a fault condition to the frequency converter.

This fault occurs when the control place is set to the keypad, but the optional door panel has been disconnected. It indicates a physical connection or communication issue between the optional board and the main control API.

The data connection between the fieldbus Master controller and the fieldbus interface of the drive has been interrupted or broken. This results in a loss of communication with the higher-level control system.

This fault indicates that the connection between an optional board and the main API (control unit) has been broken. This could be due to an improperly seated option board, a faulty slot, or a damaged board itself.

This fault occurs when both the run forward and run backward commands are simultaneously active (high) via the digital input signals. This is a conflicting command input that prevents proper motor operation.

The motor identification run procedure has failed to complete successfully. Common reasons include the run command being removed before the identification process finished, the motor not being properly connected to the frequency converter, or a mechanical load being present on the motor shaft during the run.

This fault indicates that an over low or over high temperature condition has been detected by the OPTBH option board's temperature inputs. It means a monitored temperature has exceeded its defined threshold, as set by parameters P13.26 and P13.27.