Cause : Defective capacitor(s) in at least one phase of line filter comes when a change in the line filter capacitance was detected in at least one line phase. The voltages and phase currents of the line filter, measured using a Voltage Sensing Module (VSM), indicate a deviation of the filter capacitances from the value parameterized in p0221.

• A change or a defect of the line filter capacitors results in a shift of the resonant frequencies and can result in severe damage to the drive system.

- check the parameterized value of the filter capacitance (p0221).

- check the correct wiring of the Voltage Sensing Module (VSM): Differential voltages u12 and u23 must be present at the 100 V/690 V inputs of the VSM; the phase currents of the line filter must be connected to the 10 V inputs through a current - voltage converter.

- check the alarm limits for the permissible filter capacitance deviation (p3676).

- check the scaling of the line supply voltage measurement using the VSM (p3660).

- check the scaling of the filter current measurement using the VSM (p3670).

- check the line filter capacitors and if required, replace the line filter.