Danfoss VLT AutomationDrive

The drive's internal serial port failed to initialize during start-up or operation. This indicates a communication issue within the drive's control system.

The control card voltage on terminal 50 is less than 10 V, indicating an overload on the 10 V supply. This can be caused by a short circuit in a connected potentiometer or incorrect wiring of the potentiometer.

This warning/alarm appears if programmed in parameter 6-01 Live Zero Timeout Function. It indicates that the signal on one of the analog inputs is less than 50% of its programmed minimum value, typically caused by broken wiring or a faulty signal-sending device.

No motor is connected to the output of the frequency converter. This indicates an open circuit condition on the motor output terminals.

A phase is missing on the supply side, or the mains voltage imbalance is too high. This message can also appear if there is a fault in the input rectifier. Options for handling this are programmed in parameter 14-12 Function at Mains Imbalance.

The DC-link voltage is higher than the drive's high-voltage warning limit, which depends on the drive voltage rating. The unit remains active at this warning state, but continued high voltage could lead to an overvoltage trip.

The DC-link voltage is lower than the drive's low-voltage warning limit, which depends on the drive voltage rating. The unit remains active at this warning state, but a further drop could lead to an undervoltage trip.

If the DC-link voltage exceeds a specific limit, the frequency converter will trip after a certain time delay. This typically occurs due to regenerative energy from the motor during deceleration or an issue with the mains supply.

If the DC-link voltage drops below the undervoltage limit, the drive checks for a 24 V DC back-up supply. If no back-up is connected, the drive trips after a fixed time delay, which varies by unit size. This usually indicates an issue with the mains supply.

The frequency converter has been operating at more than 100% overload for an excessive period and is about to trip. A warning is issued at 98% overload, and a trip (alarm) occurs at 100%. The frequency converter cannot be reset until the internal thermal counter drops below 90%.

The electronic thermal protection (ETR) indicates the motor is too hot. The drive issues a warning or alarm when the internal counter exceeds 90% (depending on parameter 1-90) and trips when it reaches 100%, typically due to prolonged operation above 100% overload.

The motor thermistor either indicates an overtemperature condition or has become disconnected. The drive can be configured to issue a warning or an alarm based on the setting in parameter 1-90 Motor Thermal Protection.

The motor or generator torque has exceeded the configured limit defined in parameter 4-16 Torque Limit Motor Mode or parameter 4-17 Torque Limit Generator Mode. Parameter 14-25 Trip Delay at Torque Limit can elevate this condition from a warning to an alarm after a set delay.

The inverter peak current limit, approximately 200% of the rated current, has been exceeded. This warning typically lasts about 1.5 seconds before the frequency converter trips and issues an alarm. Common causes include shock loading, rapid acceleration with high-inertia loads, or issues during kinetic back-up.

There is a current leakage from the output phase to ground, which could be located in the cable between the frequency converter and the motor, or within the motor itself. The drive's current transducers detect this by measuring a significant deviation between the output and input currents.

A fitted option card is not fully operational or compatible with the present control card hardware or software version. This incompatibility prevents the drive from functioning correctly with the installed option.

A short-circuit condition is detected either in the motor windings or within the motor wiring connecting to the frequency converter. This poses a significant risk of damage to the drive and motor if not resolved.

No communication is detected from the control word source to the frequency converter. This warning is active only when parameter 8-04 Control Word Timeout Function is not set to [0] Off. If set to [5] Stop and trip, the drive will ramp down to a stop and issue an alarm.

The temperature sensor connected to the drive's input is either not detected, improperly connected, or providing an invalid signal. This prevents the drive from accurately monitoring temperature.

A parameter has been configured with a value that falls outside its acceptable range. The specific parameter number is typically displayed on the drive's LCP, indicating an invalid setting.

This warning/alarm indicates an issue with the hoist mechanical brake control. A value of '0' means the torque reference was not reached before the timeout set by parameter 2-27 Torque Ramp Up Time. A value of '1' means the expected brake feedback was not received before the timeout set by parameter 2-23 Activate Brake Delay or parameter 2-25 Brake Release Time.

The drive's protective function has detected an issue with the internal fan, indicating it is not running or improperly mounted. For DC fans, this occurs if no feedback is received from its sensor when commanded to run. For AC fans, the voltage supply is monitored.

The drive's protective function has detected an issue with the external fan, indicating it is not running or improperly mounted. For DC fans, this occurs if no feedback is received from its sensor when commanded to run. For AC fans, the voltage supply is monitored.

The brake resistor is monitored during operation. If a short circuit occurs, the brake function is disabled and the warning appears. The frequency converter is still operational, but without the brake function.

The power transmitted to the brake resistor, calculated as an average over the last 120 seconds, exceeds 90% of its capacity. If option [2] Trip is selected in parameter 2-13 Brake Power Monitoring, the frequency converter trips when dissipated braking power reaches 100%.

An option alarm is received, specific to the option. This is most likely caused by a power-up or a communication fault affecting the option card.

This warning/alarm is active when the supply voltage to the drive is lost. It is only issued if parameter 14-10 Mains Failure is not configured to [0] No function.

There is a significant current imbalance detected between the power units of the drive. This indicates an unequal load distribution or an issue with one of the power phases.

A general internal fault has occurred within the drive. A specific sub-code number, as defined in Table 6.5, is shown to provide more detail about the nature of the internal issue.

No feedback is received from the heat sink temperature sensor, meaning the IGBT thermal sensor signal is unavailable on the power card. The problem could stem from the power card, gatedrive card, or the ribbon cable connecting them.

The digital output terminal 27 is experiencing an overload condition. This is likely due to excessive current draw from the connected load or a short-circuit, potentially damaging the output circuitry.

The digital output terminal 29 is experiencing an overload condition. This is likely due to excessive current draw from the connected load or a short-circuit, potentially damaging the output circuitry.

A digital output on either terminal X30/6 or X30/7 (on MCB 101) is overloaded. This indicates excessive current draw from the connected load or a short-circuit on one of these terminals.

The data stored in the power EEPROM (Electrically Erasable Programmable Read-Only Memory) is either corrupted, unreadable, or outdated. This can compromise the drive's ability to operate correctly by affecting stored parameters or configuration.

A general internal fault has occurred within a specific range of internal error codes. This indicates an unspecified internal hardware or software malfunction that requires specialized attention.

A parameter has been configured with a value that falls outside its acceptable minimum or maximum range. This prevents the drive from operating correctly and can lead to unexpected behavior.

A general internal fault has occurred within a specific range of internal error codes. This indicates an unspecified internal hardware or software malfunction that requires specialized attention.

The software installed on the option card in slot A is outdated. This can lead to compatibility problems, missing functionalities, or unstable operation with the main drive software.

The software installed on the option card in slot B is outdated. This can lead to compatibility problems, missing functionalities, or unstable operation with the main drive software.

The software installed on the option card in slot C1 is outdated. This can lead to compatibility problems, missing functionalities, or unstable operation with the main drive software.

The software installed on the option card in slot A is not compatible or permitted for use with the current drive configuration. This prevents proper integration and functionality of the option.

The software installed on the option card in slot B is not compatible or permitted for use with the current drive configuration. This prevents proper integration and functionality of the option.

The software installed on the option card in slot C1 is not compatible or permitted for use with the current drive configuration. This prevents proper integration and functionality of the option.

A general internal fault has occurred within a specific range of internal error codes. This indicates an unspecified internal hardware or software malfunction that requires specialized attention.

The digital signal processor (DSP) has undergone an unexpected hardware reset. This could be due to a transient power issue, an internal watchdog timer, or a deeper hardware malfunction.

Parameters calculated or derived for the motor were not successfully transferred to the digital signal processor. This can lead to incorrect motor control, poor performance, or instability.

Essential power data failed to transfer correctly to the digital signal processor during drive power-up. This indicates a potential internal communication or data integrity issue that prevents proper initialization.

The digital signal processor (DSP) received an excessive number of unknown SPI (Serial Peripheral Interface) telegrams. This fault code can also indicate an MCO (Motor Control Option) power-up issue, potentially caused by poor EMC protection or improper grounding.

An error occurred during the copying of data in RAM (Random Access Memory). This suggests a memory integrity problem or a transient issue within the drive's internal data handling.

An incompatible software version (48.3X or newer) is being used with an older MK1 control card. This mismatch prevents proper operation and requires a hardware upgrade.

An internal issue or critical incompatibility necessitates the replacement of the control card. This fault indicates a problem beyond typical troubleshooting, often related to hardware failure.

The Local Control Panel (LCP) internal software stack has overflowed. This indicates a potential software or processing issue within the LCP, possibly due to complex operations or a firmware bug.

The serial port buffer has overflowed, indicating that data is being received faster than it can be processed. This can lead to loss of communication or corrupted data.

The USB port buffer has overflowed, indicating that data is being received faster than it can be processed. This can lead to loss of communication or corrupted data for USB connections.

A parameter has been configured with a value that falls outside its acceptable minimum or maximum range within a specific internal code range. This prevents the drive from operating correctly and can lead to unexpected behavior.

The hardware of the option card installed in slot A is incompatible with the control board hardware. This prevents proper integration and function of the option, requiring a compatible replacement.

The hardware of the option card installed in slot B is incompatible with the control board hardware. This prevents proper integration and function of the option, requiring a compatible replacement.

The hardware of the option card installed in slot C0 is incompatible with the control board hardware. This prevents proper integration and function of the option, requiring a compatible replacement.

The hardware of the option card installed in slot C1 is incompatible with the control board hardware. This prevents proper integration and function of the option, requiring a compatible replacement.

A general internal fault has occurred within a specific range of internal error codes. This indicates an unspecified internal hardware or software malfunction that requires specialized attention.