What it means
F30903 is raised by the power unit when communications fail on its I2C bus: the power unit can no longer correctly talk to an EEPROM or to an analog/digital converter inside it. The message value of the fault is the fault value, which the drive also holds in r0949; interpret it hexadecimal to find out which of the two cases applies. The same code is described for G120, G120XA, G130, G150, S120 and S150 with an identical cause and remedy.
Why it appears
- Communications error with an EEPROM or an analog/digital converter in the power unit.
- The fault value (r0949, interpret hexadecimal) tells which situation the drive has detected: 80000000 hex is an internal software error, 00000001 hex ... 0000FFFF hex is a module fault.
What to check
- Read the fault value in r0949 and interpret it hexadecimal.
- If the fault value is 80000000 hex (internal software error): upgrade the firmware to a later version.
- If the fault value is 00000001 hex ... 0000FFFF hex (module fault): replace the module.
Reading the message value
- The drive stores the fault value in r0949 and also outputs it as the message value of F30903; interpret it hexadecimal.
- 80000000 hex — internal software error.
- 00000001 hex ... 0000FFFF hex — module fault.
Parameters the manual names
- r0949 — fault value: read the value here, interpreted hexadecimal, to decide whether F30903 calls for a firmware upgrade (80000000 hex) or for replacing the module (00000001 hex ... 0000FFFF hex).
Acknowledging and restarting
F30903 must be acknowledged immediately. Depending on the drive object, the drive is either switched off when the fault occurs or keeps running; in either case it will not return to service until the fault has been acknowledged and the cause it indicates has been remedied.
What differs between the drive families
Straight from the manuals' own fields — F30903 is not described identically everywhere.
| Drive family | Reaction | Acknowledge | Message class | Component | Manual |
|---|---|---|---|---|---|
| S120, S150 | Infeed: NONE (OFF1, OFF2) Servo: NONE (IASC/DCBRK, OFF1, OFF2, OFF3, STOP2) Vector: NONE (IASC/DCBRK, OFF1, OFF2, OFF3, STOP2) | IMMEDIATELY | Hardware/software error (1) | Power Module | SINAMICS S120, S150 List Manual · p. 3023 |
| G130, G150 | Vector: NONE (IASC/DCBRK, OFF1, OFF2, OFF3, STOP2) Infeed: NONE (OFF1, OFF2) | IMMEDIATELY | Hardware/software error (1) | Power Module | SINAMICS G130, G150 List Manual · p. 1714 |
| G120 | OFF2 (IASC/DCBRK, NONE, OFF1, OFF3, STOP2) | IMMEDIATELY | Hardware/software error (1) | — | SINAMICS G120 · p. 932 |
| G120XA | OFF2 (IASC/DCBRK, NONE, OFF1, OFF3, STOP2) | IMMEDIATELY | — | — | SINAMICS G120XA PN converter · p. 1166 |
The drives this code lives on
F30903 is described for G120, G120XA, G130, G150, S120, S150. These are the converters of those families in our catalogue — price on request.
Questions technicians ask
What does SINAMICS fault F30903 mean?
The power unit reports a communications error on its I2C bus, with an EEPROM or an analog/digital converter. The fault value in r0949 distinguishes an internal software error (80000000 hex) from a module fault (00000001 hex ... 0000FFFF hex).
How do I clear fault F30903?
Read the fault value in r0949 hexadecimal: for 80000000 hex upgrade the firmware to a later version, for 00000001 hex ... 0000FFFF hex replace the module. Acknowledge the fault immediately afterwards.
Where can I read the fault value of F30903?
In r0949. Interpret the value hexadecimal, as the manual specifies, to decide between the two remedies.
Codes next to this one
Source
Written from Siemens' own List Manuals and operating instructions; every number, designation and parameter on this page is checked against them before publication.
All SINAMICS codes: fault and alarm codes · the F30xxx group · SINAMICS manuals · Siemens manuals