Vacon NXP/C AC Drive

The input line phase supervision has detected that one or more input line phases are missing. Subcodes in T.14 can specify if the issue relates to diode supply (S1) or active front end (S2) phase supervision. This prevents proper charging of the DC bus and operation of the drive.

The current measurement system has detected that there is no current flowing in one of the motor phases. This typically indicates an open circuit condition in the motor cables or within the motor windings, which can lead to motor damage or uncontrolled operation.

This fault indicates a problem with the braking system, specifically that no brake resistor is installed, the installed brake resistor is broken (open circuit), or there is an internal failure within the brake chopper itself. The drive cannot dissipate regenerative energy during deceleration without a functioning brake resistor and chopper.

The heatsink temperature of the frequency converter has fallen below –10 °C. Operating the drive outside its specified temperature range can impact component performance and lifespan.

The heatsink temperature of the frequency converter has exceeded 90 °C (a warning is issued at 85 °C). Subcodes in T.14 indicate the measurement source (S1 = Measurement, S2 = Internal thermistor). Prolonged operation at high temperatures can cause irreversible damage to the drive's internal components.

The motor stall protection has tripped, indicating that the motor has either stopped or is operating at a very low speed under a load that exceeds its capacity. This condition can lead to motor overheating and mechanical damage.

The frequency converter's internal motor temperature model has detected overheating in the motor, typically due to prolonged overload. Continued operation under this condition will damage motor windings and insulation.

The motor underload protection has tripped, indicating that the motor is operating with significantly less load than expected or specified. This can be due to a disconnected load, broken component in the mechanical system, or incorrect parameter settings.

A problem has been detected in the encoder signals, which are crucial for speed and position control. Subcodes in T.14 provide specifics like missing channels A (S1) or B (S2), both channels missing (S3), reversed encoder (S4), missing encoder board (S5), serial communication fault (S6), channel A/B mismatch (S7), resolver/motor pole pair mismatch (S8), or missed start angle (S9). This can lead to loss of accurate motor control.

This fault indicates a component failure or faulty operation within the frequency converter system. Subcodes in T.14 provide more specific information, such as issues with motor voltage feedback (S1), ASIC trip (S4), VaconBus disturbance (S5), charging switch (S6, S7), power unit communication (S9, S10, S11), or lack of power to the driver card (S8). If not resolved, it indicates an internal hardware or communication issue.

The DC-link voltage has fallen below the voltage limits defined in Table 37. This is most likely caused by a low or interrupted supply voltage. Subcodes in T.14 (S1, S2, S3) can indicate if the DC-link was too low during run, no data was received from the power unit, or undervoltage control supervision tripped. A persistent undervoltage condition can prevent the drive from operating or restarting.