Vacon 100 FLOW Application Guide

The frequency converter has detected a motor current exceeding 4 times the nominal current (I_H). This condition can result from a sudden heavy load increase, a short circuit in the motor cables, or an unsuitable motor for the drive. Subcodes indicate hardware trip, current cutter, or current controller supervision.

One of the input line phases is missing. This detection can be via phase supervision diode supply or an active front end. This usually points to an issue with the incoming power supply or its connection.

Current measurement has detected that there is no current flowing in one of the motor phases. This indicates a break in the circuit to the motor, either in the motor cable itself or within the motor windings.

This fault indicates that either no brake resistor is installed, the installed brake resistor is broken, or there is a failure within the brake chopper unit itself. This prevents proper dissipation of regenerative energy.

The heatsink temperature of the frequency converter is measured to be below –10°C. This indicates an unusually cold ambient operating environment.

The heatsink temperature of the frequency converter has exceeded 90°C, after a warning issued at 85°C. Subcodes indicate if the measurement itself or an internal thermistor is the source of the detection. This suggests insufficient cooling or excessive internal heat generation.

The motor stall protection has tripped. This occurs when the motor is unable to rotate or maintain speed under load, possibly due to a mechanical obstruction, excessive load, or insufficient motor torque.

The frequency converter's internal motor temperature model has detected overheating of the motor. This typically occurs when the motor is overloaded for an extended period, causing its temperature to rise excessively.

The motor underload protection has tripped. This indicates that the motor is operating with significantly less load than expected, potentially due to a broken mechanical connection, loss of fluid in a pump, or other load-related issues.

This is a warning (not a fault trip) indicating an unbalance between power modules in paralleled units. Subcodes specify if the unbalance is in current or DC-Voltage.

The DC-link voltage has exceeded its predefined limits. Common causes include a deceleration time setting that is too short, or high overvoltage spikes present in the incoming supply voltage. Subcodes specify if it's a hardware trip or overvoltage control supervision.

A parameter save fault has occurred, indicating an issue with storing data to or retrieving data from the EEPROM. This can be due to faulty operation or a component failure within the EEPROM memory.

The values displayed on the frequency converter's internal counters are incorrect. This suggests an issue with the internal counting mechanism or data integrity.

The microprocessor watchdog has tripped, indicating a fault in the microprocessor's operation. This is typically caused by faulty internal operation or a component failure.

The start-up of the drive has been prevented. This can be due to active safety interlocks, specific parameter settings, or external control signals inhibiting operation.

The thermistor input on an option board has detected too high a motor temperature, or the input itself is improperly terminated. This protects the motor from overheating.

Current measurement has detected that the sum of the motor phase currents is not zero. This indicates an insulation failure in the motor cables or within the motor windings themselves, causing current to flow to ground.

The IGBT Inverter Bridge hardware overtemperature protection has detected an excessively high short-term overload current. This typically occurs under heavy transient loads or with incorrect motor sizing.

The cooling fan of the frequency converter does not start when an ON command is given. This will lead to insufficient cooling and potential overtemperature conditions.

A message sent on the CAN bus was not acknowledged, indicating a communication issue. This could be due to an inactive device on the bus or a mismatch in configuration.

A problem has occurred within the application software running on the frequency converter. This indicates an issue with the custom programming or logic.

An option board or power unit has been changed to a new device of the same type and rating. Old parameter settings will continue to be used.

An option board of the same type has been added to the frequency converter. The existing board settings will be used.

An option board has been removed from the frequency converter. The functionality associated with that device is no longer available.

An unknown option board or drive component has been detected. Subcodes indicate issues like an unknown device, a power unit type mismatch in parallel systems, or incompatible software/control unit versions.

The IGBT Inverter Bridge overtemperature protection has detected an excessively high short-term overload current. This typically occurs under heavy transient loads or with incorrect motor sizing.

The brake resistor has exceeded its safe operating temperature limit. This indicates that the resistor is dissipating too much energy, possibly due to excessive braking, incorrect resistance value, or insufficient cooling.

A problem has been detected in the encoder signals. Subcodes pinpoint specific issues such as missing channel A or B signals, both channels missing, encoder reversed, missing encoder board, serial communication fault, channel A/B mismatch, resolver/motor pole pair mismatch, or missed start angle.

An option board or power unit has been changed to a new device of a different type or rating than the previously installed one. This requires parameter re-configuration for the new device.

An option board of a different type has been added to the frequency converter. This new device requires its specific parameters to be set.

A division by zero error has occurred within the application program running on the frequency converter. This indicates a mathematical error in the custom logic.

The charging switch is detected as open when a START command has been given. This points to either faulty operation of the switch or a component failure within the charging circuit of the frequency converter.

The current at an analogue input, configured for a 4-20 mA signal range, is measured to be below 4 mA. This typically indicates a broken or loose control cable or a failure of the signal source providing the current.

A digital input fault has occurred, meaning a fault signal has been received from an external source connected to a digital input. This indicates an issue in the external system monitored by the drive.

The communication link between the control keypad and the frequency converter is broken. This prevents control and monitoring via the keypad.

The data connection between the fieldbus Master and the fieldbus board in the frequency converter is broken. This disrupts communication and control via the fieldbus network.

Indicates a defective option board or an issue with the slot into which an option board is inserted. This can affect the functionality provided by the option board.

The temperature limit values set for the PT100 option board parameters have been exceeded. This indicates an overtemperature condition on the PT100 board itself or its connected sensors.

A stop signal has been received from an option board, indicating that an external emergency stop circuit has been activated. This typically means an external safety device or system has initiated a shutdown.

This fault has various potential causes, including a defective internal component or a short-circuit or overload in the brake resistor. This fault cannot be reset from the keypad and requires immediate power attention.

Indicates a component failure or faulty operation within the frequency converter system. Subcodes provide more specific details such as motor voltage feedback issues, ASIC trip, VaconBus disturbance, charging switch problems, or power unit communication errors.

The DC-link voltage has fallen below the voltage limits defined in Table 37. The most probable cause is a supply voltage that is too low, or an internal frequency converter fault. Subcodes specify if the DC-link was too low during run, no data from power unit, or undervoltage control supervision.