Fault 20 Device monitoring

Response: Output stage inhibit + open line contactor + module bus response "Critical"

System state: Fault acknowledgment with CPU reset

Cause

Measure

Internal electronics supply voltage or externally connected DC 24 V standby supply voltage outside permitted voltage range.

Check the voltage level of the external DC 24 V standby supply voltage and check for correct connection. If required, correct.

– Acknowledge the fault.

– If the fault occurs repeatedly, replace the device. For further support, contact SEW‑EURODRIVE Service.

Response: Output stage inhibit + open line contactor + module bus response "Critical"

Cause

Measure

Fault in the device hardware.

– Acknowledge the fault.

– If the fault occurs repeatedly, replace the device. For further support, contact SEW‑EURODRIVE Service.

Response: Warning + line contactor unchanged + module bus response "Warning" with self-reset

Cause

Measure

Fan function impaired.

Check the fan for proper functioning.

Response: Output stage inhibit + line contactor unchanged + module bus response "Critical"

Cause

Measure

Fan defective.

Contact SEW‑EURODRIVE Service.

Response: Output stage inhibit + line contactor unchanged + module bus response "Critical"

Cause

Measure

Supply voltage of fan missing.

Check the connection or establish a connection.

Response: Output stage inhibit + line contactor unchanged + module bus response "Critical"

Cause

Measure

Internal fuse or reverse polarity protection defective.

Contact SEW‑EURODRIVE Service.

Response: Output stage inhibit + line contactor unchanged + module bus response "Standard"

Cause

Measure

Fault in the device hardware. Power section does not provide temperature data.

– Acknowledge the fault.

– If the fault occurs repeatedly, replace the device. For further support, contact SEW‑EURODRIVE Service.