What it means
A35803 is a Terminal Module message on SINAMICS S120 and S150; the manuals print it as TM: Memory test
. It is raised when an error occurs on the Terminal Module while its memory test is running. Depending on how the drive is configured, the same condition can also be output as a fault (F) or signalled without any reaction (N); as an alarm it triggers no automatic reaction of the drive.
Why it appears
- An error has occurred inside the Terminal Module during its memory test.
What to check
- Check whether the permissible ambient temperature for the Terminal Module is being maintained.
- Replace the Terminal Module.
Acknowledging and restarting
The alarm does not have to be acknowledged. If the drive is configured so that the same condition appears as a fault, it is acknowledged IMMEDIATELY (POWER ON)
once the Terminal Module has been checked or replaced; the drive takes no automatic action in any variant.
The same on every family
Every manual that describes A35803 gives it the same reaction, acknowledgement and message class.
| Drive family | Reaction | Acknowledge | Message class | Component | Manual |
|---|---|---|---|---|---|
| S120, S150 | NONE | NONE | Hardware/software error (1) | Terminal Module (TM) | SINAMICS S120, S150 List Manual · p. 3233 |
The drives this code lives on
A35803 is described for S120, S150. These are the converters of those families in our catalogue — price on request.
Questions technicians ask
What does alarm A35803 mean on a SINAMICS S120 or S150?
It reports that an error occurred during the memory test on a Terminal Module (TM), for example a TM15, TM17 or TM41. As an alarm it takes no automatic action on the drive.
How do I fix A35803?
Check first that the ambient temperature at the Terminal Module is within the permissible range. If the memory-test error persists, the remedy is to replace the Terminal Module.
Does A35803 need to be acknowledged?
No — as an alarm it does not have to be acknowledged. If the same condition is configured as a fault, it is acknowledged IMMEDIATELY (POWER ON).
Why does A35803 keep coming back?
The Terminal Module is failing its memory test again. If the ambient temperature is within the permissible range and the message still returns, replace the Terminal Module.
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 A35xxx group · SINAMICS manuals · Siemens manuals