What it means
A05002 is the alarm Power unit: Air intake overtemperature
. It is raised when the air intake temperature at the power unit reaches the alarm threshold; for air-cooled power units that threshold is 42 °C, with a hysteresis of 2 K. In the G120 and G120XA manuals the cause text is expressly limited to chassis power units. What the power unit does once the threshold is reached is set in p0290. The manuals state the escalation verbatim: If the air intake temperature increases by an additional 13 K, then fault F30035 is output.
Depending on how the drive is configured, the same condition can also be signalled with no reaction (N).
Why it appears
- The alarm threshold for the air intake overtemperature has been reached at the power unit.
- For air-cooled power units the threshold is 42 °C with a hysteresis of 2 K; the G120 and G120XA manuals scope this to chassis power units.
What to check
- Check whether the ambient temperature is within the defined limit values.
- Check whether the fan has failed — and check its direction of rotation.
- On the G115D and G120C the manuals condense the entry to a single question: are the load conditions and duty cycle configured accordingly?
Parameters the manual names
- p0290 (Power unit overload response / PU overl response) — set here how the power unit responds when the air intake overtemperature alarm threshold is reached.
Acknowledging and restarting
The drive triggers no reaction to this alarm and no acknowledgement is required, so there is nothing to reset at the panel; the overtemperature response itself follows p0290. What matters is dealing with the temperature while it is still only an alarm: if the air intake temperature climbs a further 13 K, the drive outputs fault F30035. The manual's checklist — ambient temperature within the defined limit values, fan and its direction of rotation — is how the condition is dealt with.
What differs between the drive families
Straight from the manuals' own fields — A05002 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. 2746 |
| 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 | — | — | 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
A05002 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 temperature triggers alarm A05002?
On air-cooled power units the alarm threshold for the air intake temperature is 42 °C, with a hysteresis of 2 K. What the drive does at that threshold is set in p0290.
Does A05002 have to be acknowledged?
No. The drive triggers no reaction to this alarm and no acknowledgement is required; it warns that the intake air has reached the threshold.
What happens if the air intake temperature keeps rising after A05002?
If it rises by a further 13 K, the drive outputs fault F30035.
What should I check for A05002?
Whether the ambient temperature is within the defined limit values, and whether the fan has failed — including its direction of rotation. On the G115D and G120C the manuals also ask whether the load conditions and duty cycle are configured accordingly.
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