What it means
A34807 is an alarm from the Voltage Sensing Module (VSM): the module reports that a timeout has occurred in its internal sequence control. Both manuals that describe this code — for G130, G150 and for S120, S150 — name the VSM as the affected component and give the same cause, so the message is described once here. Depending on the drive's configuration, the same condition can also be issued as a fault (F) or with no reaction (N).
Why it appears
- The sequence control inside the Voltage Sensing Module (VSM) has run into a timeout — the module reports the error itself, and no further cause is given.
What to check
- Replace the Voltage Sensing Module (VSM). The manuals name this as the only remedy for A34807; no measurement, inspection or setting is described.
Acknowledging and restarting
When the condition appears as a fault (F), POWER ON acknowledges it immediately; the manuals describe no other reset action for this message.
The same on every family
Every manual that describes A34807 gives it the same reaction, acknowledgement and message class.
| Drive family | Reaction | Acknowledge | Message class | Component | Manual |
|---|---|---|---|---|---|
| G130, G150 | NONE | NONE | Hardware/software error (1) | Voltage Sensing Module (VSM) | SINAMICS G130, G150 List Manual · p. 1856 |
| S120, S150 | NONE | NONE | Hardware/software error (1) | Voltage Sensing Module (VSM) | SINAMICS S120, S150 List Manual · p. 3186 |
The drives this code lives on
A34807 is described for G130, G150, S120, S150. These are the converters of those families in our catalogue — price on request.
Questions technicians ask
What does A34807 mean on a SINAMICS drive?
It is an alarm from the Voltage Sensing Module (VSM) reporting a timeout in its internal sequence control. It occurs on G130, G150, S120 and S150.
How do I fix alarm A34807?
The manuals list exactly one remedy: replace the Voltage Sensing Module (VSM). No checks, measurements or parameters are described for this message.
Can A34807 also appear as a fault?
Yes — depending on the drive's configuration, the same condition is also issued as a fault (F) or with no reaction (N). As a fault it is acknowledged immediately with POWER ON.
Is there a parameter to reset A34807?
No. The entries for this code name no parameter; the only remedy given is replacing the VSM.
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 A34xxx group · SINAMICS manuals · Siemens manuals