What it means
A49941 reports that the protective breaker for the anti-condensation heating has tripped. The message is output via the signal source assigned to binector input p6577[29] of the Control Unit, the input the manual lists under the circuit monitoring functions. Depending on how the drive is configured, the same condition can also be raised as fault F49941 instead of this alarm.
Why it appears
- The protective breaker in the anti-condensation heating circuit has tripped.
What to check
- Check the anti-condensation heating circuit.
- Trace the signal source wired to binector input p6577[29] of the Control Unit, since this is the path over which the tripped-breaker status reaches the drive.
Parameters the manual names
- p6577 — BI: Circuit monitoring functions signal source. Index [29] of this binector input is the signal source through which this message is output at the Control Unit, so this is where the breaker-status signal behind A49941 is assigned.
Acknowledging and restarting
As an alarm, A49941 requires no acknowledgement: it clears itself once the anti-condensation heating circuit is intact again and the protective breaker is no longer tripped. If the drive is configured to output the same condition as fault F49941 instead, the drive executes the shutting-down reaction set for the affected drive object, and the fault can be acknowledged immediately once the circuit has been checked and the breaker reset.
The same on every family
Every manual that describes A49941 gives it the same reaction, acknowledgement and message class.
| Drive family | Reaction | Acknowledge | Message class | Component | Manual |
|---|---|---|---|---|---|
| S120, S150 | NONE | NONE | External measured value / signal state outside the permissible range (16) | Control Unit (CU) | SINAMICS S120, S150 List Manual · p. 3297 |
The drives this code lives on
A49941 is described for S120, S150. These are the converters of those families in our catalogue — price on request.
Questions technicians ask
What does SINAMICS alarm A49941 mean?
It means the protective breaker for the anti-condensation heating has tripped. The Control Unit receives this status through the signal source at binector input p6577[29].
How do I fix and reset alarm A49941?
Check the anti-condensation heating circuit and put the protective breaker back into service. As an alarm, A49941 needs no acknowledgement and disappears by itself once the condition is gone.
Can A49941 also appear as a fault?
Yes. Depending on the drive configuration, the same condition can be issued as fault F49941; the drive then executes the shutting-down reaction configured for the drive object and the fault is acknowledged immediately.
Which parameter belongs to A49941?
p6577 — BI: Circuit monitoring functions signal source. Index [29] of this binector input is the signal source through which the message is output at the Control Unit.
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 A49xxx group · SINAMICS manuals · Siemens manuals