What it means
A49923 reports that a protective breaker for the terminal strip in the 24 V circuit has tripped. The message is output via the signal source of binector input p6577[6] of the Control Unit — the input the manual assigns to the circuit monitoring functions. As an alarm it needs no acknowledgment and does not force the drive to change state; depending on the configuration, the same condition can also be issued as fault F49923, in which case the drive objects react with OFF1 and the fault must be acknowledged IMMEDIATELY.
Why it appears
- The protective breaker for the terminal strip's 24 V circuit has tripped.
What to check
- Check the terminal strip for the 24 V circuit.
Parameters the manual names
- p6577 (BI: Circuit monitoring functions signal source) — this alarm is output via index [6] of this signal source at the Control Unit; the interconnection stored there is the one through which the tripped terminal-strip 24 V protective breaker is reported.
Acknowledging and restarting
As an alarm, A49923 requires no acknowledgment. If the condition is configured to appear as a fault instead, the drive objects react with OFF1 and acknowledgment is IMMEDIATELY — the fault can be acknowledged directly.
The same on every family
Every manual that describes A49923 gives it the same reaction, acknowledgement and message class.
| Drive family | Reaction | Acknowledge | Message class | Component | Manual |
|---|---|---|---|---|---|
| S120, S150 | NONE | NONE | General drive fault (19) | None | SINAMICS S120, S150 List Manual · p. 3293 |
The drives this code lives on
A49923 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 A49923 mean?
It reports that a protective breaker for the terminal strip in the 24 V circuit has tripped. The message is output via the signal source of binector input p6577[6] of the Control Unit.
Does A49923 have to be acknowledged?
No — as an alarm it requires no acknowledgment. If the same condition is issued as a fault, acknowledgment is IMMEDIATELY.
How do I clear A49923?
The remedy is to check the terminal strip for the 24 V circuit, because the protective breaker for that circuit has tripped.
What happens if A49923 appears as a fault instead of an alarm?
The drive objects then react with OFF1 and the fault must be acknowledged IMMEDIATELY.
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