Disclaimer: This article is for informational purposes. Always refer to the official Siemens documentation for your specific drive model.
: The drive hasn't performed a "stationary measurement" to learn the internal resistance and characteristics of the motor. Siemens Drive Fault Code 7902
Remember: Never reset F7902 repeatedly without investigation. Each trip is a clue. Listen to your drive, inspect your machine, and let the fault code guide you to the root cause. Disclaimer: This article is for informational purposes
Ensure (Flying Restart) is active if the motor might already be spinning when started. 2. Check the Mechanical Load Remember: Never reset F7902 repeatedly without investigation
A: No – it’s a protective trip. The drive shuts off IGBTs to prevent overheating. However, repeated tripping without fixing the cause may stress mechanical components.
Based on your diagnosis above, implement the following fixes.