What it means
F06909 is the Braking Module internal Vce fault: in the power unit, the monitoring of the collector-emitter voltage (U_ce) of the power semiconductor that controls the braking resistor has responded. The manual notes that under certain circumstances this fault is also output if a braking resistor is not connected and the energy is fed back into the Braking Module.
Why it appears
- A short circuit at the braking resistor terminals.
- A defective power semiconductor in the braking resistor control.
- No braking resistor connected: under certain circumstances the fault is then also output, because the energy is fed back into the Braking Module.
What to check
- Connect a braking resistor if none is fitted — the fault can also be output when no braking resistor is connected.
- Check the braking resistor connection.
- Check the braking resistor itself; a short circuit at the braking resistor terminals is one of the possible causes.
- Carry out a POWER ON (switch-off/switch-on).
- Replace the unit if the fault still occurs afterwards.
Parameters the manual names
- r3689 — the manual's 'See also' reference for this fault: a BO signal named Digital Braking Module Uce fault (Dig BM Uce fault). Read it to confirm the Uce fault condition of the digital Braking Module monitoring.
Acknowledging and restarting
The fault must be acknowledged immediately before the drive can be restarted. Once the braking resistor and its connection have been checked, carry out a POWER ON (switch-off/switch-on) as the remedy prescribes. If the fault returns after these steps, replace the unit.
The same on every family
Every manual that describes F06909 gives it the same reaction, acknowledgement and message class.
| Drive family | Reaction | Acknowledge | Message class | Component | Manual |
|---|---|---|---|---|---|
| S120, S150 | OFF2 | IMMEDIATELY | Braking Module faulted (14) | None | SINAMICS S120, S150 List Manual · p. 2775 |
| G130, G150 | OFF2 | IMMEDIATELY | Braking Module faulted (14) | None | SINAMICS G130, G150 List Manual · p. 1533 |
The drives this code lives on
F06909 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 SINAMICS fault F06909 mean?
It is the Braking Module internal Vce fault — the monitoring of the collector-emitter voltage (U_ce) of the power semiconductor that controls the braking resistor has responded in the power unit.
Can F06909 occur when no braking resistor is connected?
Yes. Under certain circumstances the fault is also output if no braking resistor is connected and the energy is fed back into the Braking Module, which is why connecting a braking resistor is the first remedy step.
How is F06909 cleared and the drive restarted?
Connect and check the braking resistor and its connection, then carry out a POWER ON (switch-off/switch-on) and acknowledge the fault immediately. If the fault persists, the unit must be replaced.
Which parameter belongs to F06909?
r3689, the Digital Braking Module Uce fault signal, which the manual lists as a 'See also' reference for this fault.
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 F06xxx group · SINAMICS manuals · Siemens manuals