Siemens A07904 fault code meaning
Siemens / A07904
Series: G120-CU250S-2
External armature short circuit: Contactor feedback "closed" missing
converter
Meaning: After the contactor closed, the "Closed" feedback signal (p1235) (r1239.1 = 1) was not received within the monitoring time (p1236).
Possible causes
Source: SINAMICS G120, Control Unit CU250S-2 P1416
Series: S110
External armature short circuit: Contactor feedback "closed" missing
servo drive
Meaning: After the contactor closed, the "Closed" feedback signal (p1235) (r1239.1 = 1) was not received within the monitoring time (p1236).
Possible causes
Source: SINAMICS S110 P1051