What it means
A01009 is the alarm CU: Control module overtemperature. The drive raises it when the temperature of the control module (Control Unit) has exceeded the specified limit value; the temperature being monitored is r0037[0], the Control Unit temperature. The message concerns the Control Unit (CU) itself. Depending on how the converter is configured, the same condition can also be output without a reaction (as N).
Why it appears
- The temperature of the control module (Control Unit), which the drive reads as r0037[0], has exceeded the specified limit value. All the manuals that describe A01009 give this same cause, with no further contributing conditions listed.
What to check
- Read the Control Unit temperature in r0037 (index 0) — this is the value that has exceeded the limit.
- Check the air intake for the Control Unit.
- Check the Control Unit fan.
Parameters the manual names
- r0037 — Control Unit temperature (CU temp): read index 0 here to see the temperature this alarm evaluates and to watch it fall back below the limit value.
Acknowledging and restarting
Nothing has to be acknowledged, and the drive takes no protective action on this message. The alarm is withdrawn automatically once the temperature has fallen below the limit value again — the same applies when the condition is output as N. Once the air intake and fan have been checked and r0037[0] drops, A01009 disappears by itself.
What differs between the drive families
Straight from the manuals' own fields — A01009 is not described identically everywhere.
| Drive family | Reaction | Acknowledge | Message class | Component | Manual |
|---|---|---|---|---|---|
| G130, G150 | NONE | NONE | Overtemperature of the electronic components (6) | Control Unit (CU) | SINAMICS G130, G150 List Manual · p. 1372 |
| S120, S150 | NONE | NONE | Overtemperature of the electronic components (6) | Control Unit (CU) | SINAMICS S120, S150 List Manual · p. 2558 |
| G120 | — | NONE | Overtemperature of the electronic components (6) | — | SINAMICS G120 · p. 820 |
| G120XA | NONE | NONE | — | — | SINAMICS G120XA PN converter · p. 1098 |
The drives this code lives on
A01009 is described for G120, 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 A01009 mean?
It signals that the temperature of the Control Unit, which the drive monitors as r0037[0], has exceeded the specified limit value. Depending on the configuration, the condition can also be output without a reaction (as N).
How do I fix A01009?
Check the air intake for the Control Unit and check the Control Unit fan. Once the temperature in r0037[0] falls back below the limit, the alarm is withdrawn automatically.
Does A01009 have to be acknowledged or reset?
No. The alarm is automatically withdrawn once the Control Unit temperature has fallen below the limit value again.
Where can I read the Control Unit temperature?
In parameter r0037, the Control Unit temperature. Index 0 is the value the drive evaluates for this alarm.
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 A01xxx group · SINAMICS manuals · Siemens manuals