Siemens F7403 fault code meaning
Siemens / F7403
Series: V90
DC bus voltage lower limit reached
servo drive
Meaning: DC bus voltage monitoring is valid, and the DC bus voltage lower limit has been reached in the "Run" status. Disable DC bus voltage monitoring.
Possible causes
Source: SINAMICS V90 PROFINET, SIMOTICS S-1FL6 Operating Instructions P371