What it means
F33122 is raised when the drive detects a hardware fault inside the Sensor Module that evaluates Encoder 3. The manuals describe the same event from two angles: as an internal Sensor Module hardware fault, and as a fault in the internal reference voltage of the ASICs used for encoder 3. In both readings it is an internal supply-voltage problem in the evaluation electronics, not a fault of the encoder signal itself.
Why it appears
- An internal hardware fault was detected in the Sensor Module for Encoder 3.
- The internal reference voltage of the ASICs used for encoder 3 is faulty.
What to check
- Read the fault value in r0949 (decimal) to see which internal voltage condition the Sensor Module reported — the three possible values are listed below.
- The remedy the manual gives is to replace the motor with DRIVE-CLiQ or the appropriate Sensor Module. No other corrective action is described.
Reading the message value
- 1 — reference voltage error
- 2 — internal undervoltage
- 3 — internal overvoltage
Parameters the manual names
- r0949 — holds the fault value for this code; read it in decimal to tell which of the three internal voltage errors (1, 2 or 3) the Sensor Module detected.
Acknowledging and restarting
Once the faulty DRIVE-CLiQ motor or Sensor Module has been replaced, acknowledge the fault on the operator panel or in the commissioning tool; the drive can then be restarted.
The same on every family
Every manual that describes F33122 gives it the same reaction, acknowledgement and message class.
| Drive family | Reaction | Acknowledge | Message class | Component | Manual |
|---|---|---|---|---|---|
| S120, S150 | OFF1 | IMMEDIATELY | Supply voltage fault (undervoltage) (3) | Sensor Module Encoder 3 | SINAMICS S120, S150 List Manual · p. 3140 |
| G130, G150 | OFF1 | IMMEDIATELY | Supply voltage fault (undervoltage) (3) | Sensor Module Encoder 3 | SINAMICS G130, G150 List Manual · p. 1815 |
The drives this code lives on
F33122 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 fault F33122 mean on a SINAMICS drive?
It reports a hardware fault inside the Sensor Module for Encoder 3 — the internal reference voltage of the ASICs that evaluate this encoder is faulty.
How do I clear fault F33122?
The manual gives a single remedy: replace the motor with DRIVE-CLiQ or the appropriate Sensor Module, then acknowledge the fault and restart the drive.
What does the fault value of F33122 in r0949 tell me?
Interpreted in decimal, it names the internal voltage condition: 1 means reference voltage error, 2 means internal undervoltage, 3 means internal overvoltage.
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 F33xxx group · SINAMICS manuals · Siemens manuals