What it means
The temperature at the heat sink of the power unit has reached the alarm threshold for overtemperature at the AC inverter. The converter does not trip on this alarm: the response it takes instead is set in p0290. If the heat sink temperature keeps rising and exceeds the value set in p0292[0], the drive outputs fault F30004 — the G130 and G150 manuals express this escalation as a further temperature rise of 5 K rather than an exceedance of p0292[0]. Depending on the converter configuration, the same condition can also be output with no reaction (N). G115D and G120C list the message only in their short tables, there titled “Power Module overtemperature”, without causes or remedies of their own.
Why it appears
- The heat sink of the inverter power unit has reached the overtemperature alarm threshold.
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 cooling has failed.
Parameters the manual names
- p0290 (power unit overload response): sets how the drive responds once this heat sink overtemperature alarm threshold is reached — check this response setting when the alarm appears.
- p0292 (power unit temperature alarm threshold): the value in p0292[0] is the heat sink temperature whose exceedance turns this alarm into fault F30004; on G130 and G150 the escalation is described as a further rise of 5 K.
Acknowledging and restarting
No acknowledgment is required: the drive outputs this alarm without an automatic shutdown reaction, so there is nothing to reset at the operator panel. Work through the checks above to remove the overheating condition. If the heat sink temperature continues to rise beyond p0292[0] — by a further 5 K on G130 and G150 — the drive outputs fault F30004, which is covered on its own page.
What differs between the drive families
Straight from the manuals' own fields — A05000 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. 2745 |
| G130, G150 | NONE | NONE | Power electronics faulted (5) | Power Module | SINAMICS G130, G150 List Manual · p. 1518 |
| G120 | NONE | NONE | Power electronics faulted (5) | — | SINAMICS G120 · p. 868 |
| G120XA | NONE | NONE | — | — | SINAMICS G120XA PN converter · p. 1117 |
| G115D | — | — | — | — | SINAMICS G115D distributed drive · p. 393 |
| G120C | — | — | — | — | SINAMICS G120C Converters · p. 384 |
The drives this code lives on
A05000 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 alarm A05000 mean on a SINAMICS drive?
That the temperature at the inverter heat sink has reached the overtemperature alarm threshold. The drive does not trip; the response it takes is set in p0290.
Does A05000 have to be acknowledged?
No. The alarm comes with no reaction and no acknowledgment requirement, so there is nothing to reset at the panel — you remove the overheating cause instead.
When does A05000 become the fault F30004?
When the heat sink temperature exceeds the value set in p0292[0]. The G130 and G150 manuals describe the same escalation as a further temperature rise of 5 K.
What should I check for A05000?
In this order: ambient temperature against its limit values, load conditions and load duty cycle against the dimensioning, and whether the cooling has failed.
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