What it means
F01250 is raised by the Control Unit (CU) when reading the read-only data of its EEPROM — the CU-EEPROM — fails. The manuals for G115D, G120, G120C, G120XA, G130, G150, S120 and S150 all describe the code the same way, so the fault always points at the CU itself. In the short fault tables of the G120C and G115D manuals the same code is listed under the title 'CU hardware fault'.
Why it appears
- An error occurred when the CU read the read-only data of its EEPROM (CU-EEPROM). This is the only cause the manuals name for F01250.
What to check
- Carry out a POWER ON: switch the converter off and then on again. The manuals list this as the first remedy, and it is also the acknowledgement that clears F01250.
- If F01250 occurs again after the power cycle, replace the Control Unit. No parameter change, wiring check or other on-site measure is described for this fault.
Reading the message value
- The drive stores the fault value in r0949; interpret the value as a decimal number.
- The manuals do not decode this value:
Only for internal Siemens troubleshooting.
There is therefore no bit assignment that you could evaluate on site.
Parameters the manual names
- r0949 — displays the fault value of F01250, to be read as a decimal number; because it is only for internal Siemens troubleshooting, you do not need it to clear the fault.
Acknowledging and restarting
F01250 is acknowledged with a POWER ON — switch the converter off and then on again; this is the only acknowledgement the manuals give for the fault. If the fault returns after the power cycle, the remaining remedy is to replace the Control Unit.
What differs between the drive families
Straight from the manuals' own fields — F01250 is not described identically everywhere.
| Drive family | Reaction | Acknowledge | Message class | Component | Manual |
|---|---|---|---|---|---|
| S120, S150 | NONE (OFF2) | POWER ON | Hardware/software error (1) | Control Unit (CU) | SINAMICS S120, S150 List Manual · p. 2584 |
| G130, G150 | NONE (OFF2) | POWER ON | Hardware/software error (1) | Control Unit (CU) | SINAMICS G130, G150 List Manual · p. 1396 |
| G120 | NONE (OFF2) | POWER ON | Hardware/software error (1) | — | SINAMICS G120 · p. 832 |
| G120XA | NONE (OFF2) | POWER ON | — | — | SINAMICS G120XA PN converter · p. 1109 |
| G120C | — | — | — | — | SINAMICS G120C Converters · p. 382 |
| G115D | — | — | — | — | SINAMICS G115D distributed drive · p. 392 |
The drives this code lives on
F01250 is described for G115D, G120, G120C, 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 F01250 mean?
The Control Unit detected an error while reading the read-only data of its EEPROM (CU-EEPROM). The same cause is printed for G115D, G120, G120C, G120XA, G130, G150, S120 and S150.
How do I clear fault F01250?
Carry out a POWER ON — switch the converter off and on again. If the fault comes back, replace the Control Unit.
What is the fault value of F01250 in r0949?
It is a decimal number that the manuals leave undecoded, noting that it is only for internal Siemens troubleshooting, so there is nothing to evaluate on site.
Do I have to replace the Control Unit because of F01250?
Not immediately. The first remedy is a POWER ON; replacement of the Control Unit is only the second step if the fault occurs again.
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 F01xxx group · SINAMICS manuals · Siemens manuals