Siemens A30257 fault code meaning
Siemens / A30257
Series: G200
Power unit: I2t overload (DC
converter
Meaning: The alarm threshold for overload of power unit I2t on the DC side has been exceeded. The output current and output frequency are reduced according to the selected overload response. Reducing the output current cannot sufficiently alleviate power unit overheat, so the temperature continues to rise to the power unit overload trip threshold, triggering fault F30258. See also: r0036 (Power unit overload) System messages 14.3 Faults and alarms SINAMICS G200 converter 766 Operating Instructions, 06/2026, FW V6.7, A5E54053464B AA
Possible causes
Source: SINAMICS G200 converter P768
Series: G210, G210X
"I2t (DC)"
converter
Meaning:
Possible causes
Source: SINAMICS G210 converter P934; SINAMICS G210X converter P801
Series: G220
Power unit: I2t overload (DC
converter
Meaning: The overload alarm threshold for power unit I2t on the DC side has been exceeded. Depending on the selected overload response, the output current and output frequency are reduced. Reducing the output current cannot sufficiently alleviate power unit overheat, so the temperature continues to rise to the power unit overload trip threshold and fault F30258 occurs. See also: r0036 (Power unit overload)
Possible causes
Source: SINAMICS G220 Converter P1465
Series: S200
Power unit: I2t overload (DC
servo drive
Meaning: The overload alarm threshold for power unit I2t on the DC side has been exceeded. Depending on the selected overload response, the output current and output frequency are reduced. Reducing the output current cannot sufficiently alleviate power unit overheat, so the temperature continues to rise to the power unit overload trip threshold and fault F30258 occurs. See also: r0036 (Power unit overload)
Possible causes
Source: SINAMICS S200 Compact_SIMOTICS S-1FL2 and S-1FL1 P537
Series: S210
Power unit: overload I2t (DC
servo drive
Meaning: The alarm threshold for overload of power unit I2t on the DC side has been exceeded. Depending on the selected overload response, the output current and output frequency are reduced. Reducing the output current does not sufficiently alleviate power unit overheating, so the temperature continues to rise to the power unit overload trip threshold and fault F30258 occurs.
Possible causes
Source: SINAMICS S210_SIMOTICS S-1FK2 and S-1FT2 P1366
Series: S220
Power unit: I2t overload (DC
converter
Meaning: The alarm threshold for I2t overload of the power unit on the DC side has been exceeded. The output current and output frequency are reduced according to the selected overload response. Reducing the output current cannot sufficiently alleviate power unit overheating, so the temperature continues to rise to the power unit overload trip threshold and fault F30258 occurs. See also: r0036
Possible causes
Source: SINAMICS S220 converter P2483