Fault-code and solution database

A protective trip that occurs when the drive output current exceeds the hardware limit. Usually caused by a motor cable short circuit, ground fault or an overly fast acceleration ramp.

Occurs when the DC-link voltage exceeds the upper limit. Most often caused by regenerative energy from the motor during deceleration that cannot be dissipated.

Raised when the drive detects loss or severe imbalance on one of the input (mains) phases. DC-link ripple increases.

Occurs when the DC-link voltage drops below the lower limit. Triggered by supply sag, phase loss or rectifier/capacitor issues.

A safety fault raised when the Safe Torque Off (STO) circuit detects a mismatch between its two channels or a hardware failure.

Occurs when communication between the drive and the control panel (HMI) is lost. Usually due to the panel connection or cable.

A fault raised when the power unit detects overcurrent. A motor cable short, too-fast ramp or wrong motor parameters can trigger it.

Occurs when the DC-link voltage exceeds the upper threshold. Usually from fast deceleration and undissipated regenerative energy.

Occurs when the DC-link voltage drops below the lower threshold. Triggered by supply sag, phase loss or capacitor ageing.

Occurs when the heatsink temperature exceeds the limit. Poor cooling, a clogged fan or high ambient temperature are the main causes.

Raised when the motor thermal model or sensor (PTC/KTY/PT1000) reports overtemperature. Caused by overload or poor motor cooling.

Raised when loss of one input phase is detected. DC-link ripple increases and the rectifier is stressed.

Occurs when the drive detects overcurrent during acceleration. Too-short accel time or high current from the motor/cable are typical causes.

Occurs when the DC bus voltage exceeds the limit. Fast deceleration and regenerative energy are the main causes.

Occurs when the DC bus drops below the lower limit. Supply sag, phase loss or capacitor ageing are triggers.

Occurs when the heatsink temperature exceeds the limit. Fan failure, dust or high ambient temperature are the main causes.

Raised when leakage current to ground is detected on the output. Motor/cable insulation breakdown is the main cause.

The drive trips protectively when current exceeds the allowed overload curve. Increased mechanical load or wrong sizing is the cause.

Occurs when the drive output current suddenly exceeds the limit. Short accel, mechanical jam or motor/cable issues trigger it.

Raised when a phase-to-phase or phase-to-ground short is detected on the output. Motor/cable or output stage related.

Occurs when the mains (input) voltage exceeds the allowed upper limit. Weak grids or reactive-compensation issues trigger it.

Occurs when the drive heatsink exceeds the limit. Fan, airflow or ambient temperature are the main causes.

Raised when the motor thermal protection reports overload. Increased mechanical load or wrong motor-current setting is the cause.

Occurs when output current exceeds the limit during acceleration. Short accel time or high motor/cable current is typical.

Occurs when the DC bus exceeds the upper limit. Fast deceleration and regenerative energy are the main causes.

Occurs when the main-circuit voltage drops too low. Supply sag, phase loss or capacitor ageing is the cause.

Raised when the electronic thermal relay calculates motor overheating. Mechanical load or wrong current setting is the cause.

Occurs when the drive's own overload curve is exceeded. Sustained high current or wrong sizing is the cause.

Occurs when output current exceeds the hardware limit. Motor/cable short, short ramp or output-stage failure trigger it.

Occurs when the DC bus exceeds the upper limit. Fast deceleration and regenerative energy are the main causes.

Occurs when the DC bus drops below the lower limit. Supply sag, phase loss or capacitor ageing is the cause.

Raised when the heatsink temperature reaches the pre-alarm level. Fan, airflow or ambient temperature is the cause.

Raised when electronic thermal protection calculates motor overload. Mechanical load or wrong motor-current setting is the cause.

Occurs when the drive output current exceeds the peak limit. Short ramp, mechanical impact or motor/cable issues trigger it.

Occurs when the DC-link voltage exceeds the upper limit. Fast deceleration and regenerative energy are the main causes.

Occurs when the DC-link drops below the lower limit. Supply sag, phase loss or capacitor ageing is the cause.

Raised when loss or severe imbalance of an input phase is detected. DC-link ripple increases.

Occurs when the drive's thermal overload curve (above 100%) is exceeded. Sustained high current or wrong sizing is the cause.