Error CodecriticalThermal
F30005 Power unit overtemperature
In system: Siemens Drive Faults
F30005 indicates power unit overtemperature in Siemens Drive Faults. Use this page to confirm root cause before replacement actions.
Technical Details
Fault ClassThermal
Default ReactionDrive trip and output inhibited
AcknowledgeAfter root cause correction and verification
Drive ObjectSiemens Drive Faults
Possible Causes
1Blocked airflow
HIGH likelihoodValidate this cause with diagnostic values and wiring/mechanical inspection before replacing parts.
2Fan degradation
MEDIUM likelihoodValidate this cause with diagnostic values and wiring/mechanical inspection before replacing parts.
Step-by-Step Solution
1
Action 1
Clean heat sink channel
Details
- Record measured values before and after this action
2
Action 2
Replace cooling fan if needed
Details
- Record measured values before and after this action
Diagnostic Parameters
| Parameter | Description | Value/Unit |
|---|---|---|
| r0068 | Power unit temperature | deg C |
| 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