What it means
F37024 is raised by the thermal model of the HF Damping Module when the temperature difference between the heat sink and the chip exceeds the permissible limit value. The drive switches off in response and the motor coasts to a standstill; the fault must be acknowledged before the drive can start again.
Why it appears
- The permissible load duty cycle was not maintained.
- Insufficient cooling, for example a fan failure.
- Overload.
- Ambient temperature too high.
- Pulse frequency too high.
What to check
- Adapt the load duty cycle so that the permissible duty cycle is maintained.
- 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 it is set higher than the rated pulse frequency.
Parameters the manual names
- r0037 — displays the temperature values (Control Unit temperature / CU temp); the manual cross-references this parameter for F37024, so read it while you check cooling, load and ambient temperature.
Acknowledging and restarting
Clear the fault by acknowledging it in the way the acknowledgment entry printed above the page requires; the drive will not restart until the fault has been acknowledged. Before restarting, remove the cause — restore the cooling, bring the ambient temperature back into the permissible range, check the motor load and the pulse frequency, and adapt the load duty cycle if it was exceeded.
The same on every family
Every manual that describes F37024 gives it the same reaction, acknowledgement and message class.
| Drive family | Reaction | Acknowledge | Message class | Component | Manual |
|---|---|---|---|---|---|
| S120, S150 | OFF2 | IMMEDIATELY | Power electronics faulted (5) | None | SINAMICS S120, S150 List Manual · p. 3262 |
The drives this code lives on
F37024 is described for S120, S150. These are the converters of those families in our catalogue — price on request.
Questions technicians ask
What does fault F37024 mean on a SINAMICS drive?
It is an HF Damping Module fault: the thermal model has measured a temperature difference between heat sink and chip above the permissible limit value. The drive switches off, the motor coasts, and the fault must be acknowledged.
Why does F37024 occur?
Typical causes are a load duty cycle outside the permissible cycle, insufficient cooling or fan failure, overload, ambient temperature too high, or a pulse frequency set too high.
How do I fix fault F37024?
Check that the fan is running and that the fan elements are intact, verify that the ambient temperature is in the permissible range, check the motor load, and reduce the pulse frequency if it exceeds the rated pulse frequency. Adapt the load duty cycle so it stays permissible.
Which parameter helps with F37024?
r0037, which shows the temperature values (Control Unit temperature / CU temp). The manual references it for this fault, so use it to follow the temperatures while checking the cooling and load.
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 F37xxx group · SINAMICS manuals · Siemens manuals