What it means
F30025 “Power unit: Chip overtemperature” reports that the chip temperature of the semiconductor in the power unit has exceeded the permissible limit value. The manuals for the G120, G120XA, G130, G150, S120 and S150 describe this fault identically. When it trips, the drive coasts down (OFF2), and the message value records how far the chip sits above the heat sink temperature.
Why it appears
- The permissible load duty cycle was not maintained.
- Insufficient cooling, for example a fan failure.
- Overload.
- The ambient temperature is too high.
- The pulse frequency is too high.
What to check
- Adapt the load duty cycle.
- Check whether the fan is running.
- Check the fan elements.
- Check whether the ambient temperature is in the permissible range.
- Check the motor load.
- Reduce the pulse frequency if this is higher than the rated pulse frequency.
Reading the message value
Message value %1 carries the fault value, which the drive also stores in r0949. Interpret it as a decimal number:
- Temperature difference between the heat sink and chip [0.01 °C]
Parameters the manual names
- r0949 — read it as a decimal to see the fault value for this trip: the temperature difference between the heat sink and chip, given in 0.01 °C.
- r0037 — named under “See also” for this fault; the parameter chapter defines it as the Control Unit temperature (CU temp).
Acknowledging and restarting
The drive coasts down (OFF2) and stays stopped until the fault has been acknowledged. Acknowledging is deliberately tied to the temperature: This fault can only be acknowledged after the alarm threshold for alarm A05001 has been undershot.
Let the power unit cool until the A05001 alarm threshold is undershot, then acknowledge the fault and restart the drive.
What differs between the drive families
Straight from the manuals' own fields — F30025 is not described identically everywhere.
| Drive family | Reaction | Acknowledge | Message class | Component | Manual |
|---|---|---|---|---|---|
| S120, S150 | — | — | Power electronics faulted (5) | Power Module | SINAMICS S120, S150 List Manual · p. 2946 |
| G130, G150 | OFF2 | IMMEDIATELY | Power electronics faulted (5) | Power Module | SINAMICS G130, G150 List Manual · p. 1657 |
| G120 | OFF2 | IMMEDIATELY | Power electronics faulted (5) | — | SINAMICS G120 · p. 909 |
| G120XA | OFF2 | IMMEDIATELY | — | — | SINAMICS G120XA PN converter · p. 1156 |
The drives this code lives on
F30025 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 fault F30025 mean on a SINAMICS drive?
The chip temperature of the semiconductor in the power unit has exceeded the permissible limit value. The drive coasts down (OFF2) and stores the temperature difference between heat sink and chip in r0949.
Why can I not acknowledge F30025?
The drive only accepts acknowledgement after the alarm threshold for alarm A05001 has been undershot. Wait until the chip has cooled below that threshold, then acknowledge the fault.
How do I read the F30025 fault value?
Open r0949 and interpret the value as a decimal number. It shows the temperature difference between the heat sink and the chip, given in 0.01 °C.
How do I fix F30025?
Adapt the load duty cycle, check that the fan is running and check the fan elements, verify the ambient temperature is in the permissible range, check the motor load, and reduce the pulse frequency if it is above the rated pulse frequency.
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