Error CodecriticalHardware
F30021 Output short-circuit
In system: Siemens Drive Faults
F30021 indicates output short-circuit in Siemens Drive Faults. Use this page to confirm root cause before replacement actions.
Technical Details
Fault ClassHardware
Default ReactionDrive trip and output inhibited
AcknowledgeAfter root cause correction and verification
Drive ObjectSiemens Drive Faults
Possible Causes
1Motor cable short
HIGH likelihoodValidate this cause with diagnostic values and wiring/mechanical inspection before replacing parts.
2Motor winding failure
MEDIUM likelihoodValidate this cause with diagnostic values and wiring/mechanical inspection before replacing parts.
Step-by-Step Solution
1
Action 1
Disconnect motor cable and retry
Details
- Record measured values before and after this action
2
Action 2
Test insulation resistance
Details
- Record measured values before and after this action
Diagnostic Parameters
| Parameter | Description | Value/Unit |
|---|---|---|
| r0056 | Power stage status | State |
| r0949 | Fault value | Code-specific |
Prevention Tips
Record baseline operating values after commissioning and compare during maintenance.
Review wiring torque, grounding, and cabinet conditions during planned shutdown.
Apply parameter change control to reduce repeat faults after service activities.
Frequently Asked Questions
Structured fault troubleshooting workflow for maintenance teams