What it means
A37044 is the alarm the HF Damping Module raises for an overvoltage on its 24 V power supply: the supply voltage has exceeded the 32.0 V threshold. Depending on the drive's configuration, the same condition can also be raised as a fault instead of an alarm. The related message A37041 covers the opposite case, a 24 V undervoltage alarm, and is described on its own page.
Why it appears
- There is a fault in the 24 V power supply that feeds the HF Damping Module.
- The 24 V supply voltage rose above the 32.0 V threshold.
What to check
- Check the 24 V DC voltage supply of the HF Damping Module.
Acknowledging and restarting
As an alarm, the message does not have to be acknowledged. For the fault variant the manual prints the note HF Damping Module Reaction upon F: NONE (OFF1, OFF2, OFF3) Acknowl. upon F: IMMEDIATELY (POWER ON)
— the fault can be acknowledged immediately, and a POWER ON also removes it.
The same on every family
Every manual that describes A37044 gives it the same reaction, acknowledgement and message class.
| Drive family | Reaction | Acknowledge | Message class | Component | Manual |
|---|---|---|---|---|---|
| S120, S150 | NONE | NONE | Supply voltage fault (overvoltage) (3) | None | SINAMICS S120, S150 List Manual · p. 3265 |
The drives this code lives on
A37044 is described for S120, S150. These are the converters of those families in our catalogue — price on request.
Questions technicians ask
What does A37044 mean on a SINAMICS drive?
It is the HF Damping Module alarm for a 24 V overvoltage: the module's 24 V power supply has exceeded the 32.0 V threshold.
What should I check for A37044?
Check the 24 V DC voltage supply of the HF Damping Module — the cause is a fault in that supply.
Does A37044 have to be acknowledged?
Not as an alarm. If the condition is raised as a fault, it can be acknowledged immediately, and a POWER ON also removes it.
Which drives report A37044?
The message is described for SINAMICS S120 and S150 with the HF Damping Module.
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 A37xxx group · SINAMICS manuals · Siemens manuals