What it means
Alarm A49927 reports that the protective breaker in the fan circuit of the auxiliary fan has tripped. The message belongs to the drive's circuit monitoring functions: the Control Unit picks it up via the signal source of binector input p6577[14], and no message value is supplied with it. Depending on how the drive is configured, the same condition can also be output as fault F49927.
Why it appears
- The protective breaker that monitors the fan circuit of the auxiliary fan has tripped.
What to check
- Check the auxiliary fan.
Parameters the manual names
- p6577 — BI: Circuit monitoring functions signal source. This alarm is issued via the signal source of binector input p6577[14] of the Control Unit, so this is the interconnection through which the message reaches the drive.
Acknowledging and restarting
Output as an alarm, A49927 does not have to be acknowledged. If the drive is configured to raise the same condition as fault F49927 instead, the drive object is switched off with OFF1 (the manual lists deviating reaction settings for the individual drive object types) and the fault must be acknowledged IMMEDIATELY before the drive can be restarted.
The same on every family
Every manual that describes A49927 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. 3294 |
The drives this code lives on
A49927 is described for S120, S150. These are the converters of those families in our catalogue — price on request.
Questions technicians ask
What does alarm A49927 mean on a SINAMICS S120 or S150?
It reports that the protective breaker in the fan circuit of the auxiliary fan has tripped. The Control Unit receives the message via the signal source of binector input p6577[14].
How do I acknowledge or reset A49927?
As an alarm it needs no acknowledgement and clears itself. If the drive is configured to output the condition as fault F49927 instead, the drive object trips to OFF1 and the fault must be acknowledged IMMEDIATELY.
What should I check when A49927 appears?
The remedy is to check the auxiliary fan, because the protective breaker in its fan circuit has tripped.
Can A49927 also appear as a fault?
Yes. Depending on the drive configuration, the same condition can be output as fault F49927; the reaction is then OFF1 by default, with deviating settings possible per drive object type.
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