What it means
The drive raises this alarm when the alarm threshold for the overtemperature of the rectifier has been reached. How the power unit responds to the overheating is set in p0290. The alarm works as an early warning: if the temperature of the rectifier increases by an additional 5 K, the drive triggers fault F30037. Depending on the drive's configuration, the same condition can also be issued with no reaction (N).
Why it appears
- The alarm threshold for the overtemperature of the rectifier has been reached.
- For the G115D and G120C the manual prints only a short table entry for this alarm, with the check question
Has the cooling failed?
, and refers to A05006 for the cause.
What to check
- Check whether the ambient temperature is within the defined limit values.
- Check whether the load conditions and the load duty cycle have been appropriately dimensioned.
- Check whether the fan has failed, and check its direction of rotation.
- Check whether a phase of the line supply has failed.
- Check whether an arm of the supply (incoming) rectifier is defective.
Parameters the manual names
- p0290 (Power unit overload response / PU overl response) — set here how the power unit responds when the rectifier overtemperature alarm is raised.
Acknowledging and restarting
This alarm requires no acknowledgement and the drive takes no automatic action in response to it. The behaviour on overheating itself follows the setting in p0290; if the rectifier temperature rises by a further 5 K, the drive escalates to fault F30037.
What differs between the drive families
Straight from the manuals' own fields — A05004 is not described identically everywhere.
| Drive family | Reaction | Acknowledge | Message class | Component | Manual |
|---|---|---|---|---|---|
| S120, S150 | NONE | NONE | Power electronics faulted (5) | Power Module | SINAMICS S120, S150 List Manual · p. 2747 |
| G130, G150 | NONE | NONE | Power electronics faulted (5) | Power Module | SINAMICS G130, G150 List Manual · p. 1519 |
| G120 | NONE | NONE | Power electronics faulted (5) | — | SINAMICS G120 · p. 868 |
| G120XA | NONE | NONE | — | — | SINAMICS G120XA PN converter · p. 1118 |
| G115D | — | — | — | — | SINAMICS G115D distributed drive · p. 393 |
| G120C | — | — | — | — | SINAMICS G120C Converters · p. 384 |
The drives this code lives on
A05004 is described for G115D, G120, G120C, G120XA, G130, G150, S120, S150. These are the converters of those families in our catalogue — price on request.
Questions technicians ask
What does SINAMICS alarm A05004 mean?
The alarm threshold for the overtemperature of the rectifier has been reached. The response is set in p0290, and if the temperature rises by a further 5 K the drive triggers fault F30037.
Does A05004 have to be acknowledged?
No. The drive takes no automatic action in response to this alarm and no acknowledgement is required.
What should I check when A05004 appears?
Check the ambient temperature against its defined limits, whether load and duty cycle are appropriately dimensioned, whether the fan has failed and turns in the right direction, whether a line supply phase has failed, and whether an arm of the supply rectifier is defective.
Why does the G120C manual give no causes for A05004?
On the G115D and G120C the manual prints only a short table entry for this alarm, asks whether the cooling has failed, and refers to A05006 for the cause.
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 A05xxx group · SINAMICS manuals · Siemens manuals