Fault 7 DC link
Subfault: 7.1 Description: DC link overvoltage | ||
|---|---|---|
| Response: Output stage inhibit + line contactor unchanged + module bus response "Critical" | |
Cause | Measure | |
Maximum permitted DC link voltage limit exceeded and output stage inhibited by hardware. | – Extend the deceleration ramps. – Check the supply cable to the braking resistor. – Check the technical data of the braking resistor. | |
Subfault: 7.4 Description: DC link undervoltage | ||
|---|---|---|
| Response: Output stage inhibit + open line contactor + module bus response "Critical" | |
Cause | Measure | |
DC link voltage exceeded lower limit and output stage inhibited by hardware. | – Reduce the dynamic load change from regenerative operation to motoring operation. – Check previous error, e.g. line phase failure or supply system off in motor mode. | |
Subfault: 7.9 Description: Short circuit | ||
|---|---|---|
| Response: Output stage inhibit + open line contactor + module bus response "Critical" | |
Cause | Measure | |
Short circuit in the DC link. | Check the DC link busbar. | |
Subfault: 7.10 Description: Precharging timeout | ||
|---|---|---|
| Response: Output stage inhibit + open line contactor + module bus response "Critical" | |
Cause | Measure | |
Capacitive load too high in the DC link. | Check the project planning. | |
