Fault codeF7901
The motor has overspeeded, exceeding the maximum permissible speed set by the system. The manual's first action is: “['• Check and correct the maximum speed (p1082).\n• Check if there are any peaks of actual speed. If the value of the peak is especially large, contact the hotline.']”
- Model
- Siemens SINAMICS V90, SIMOTICS S-1FL6
- Display shows
- Motor overspeed (F7901)
- Type
- Fault code
- Source
- Manual p. 298
What F7901 means
Motor overspeed p. 298
Common causes
- The maximum permissible speed has been exceeded. p. 298
What to do
- ['• Check and correct the maximum speed (p1082).\n• Check if there are any peaks of actual speed. If the value of the peak is especially large, contact the hotline.'] p. 298
Before you service the product, read the safety instructions in the manual p. 2.
If F7901 is still not resolved
- Contact service / dealer for assistance p. 2 “Qualified Personnel The product/system described in this documentation may be operated only by personnel qualified for the specific task in accordance with the relevant documentation, in particular its warning notices and safety instructions.”
- Contact service / dealer for assistance p. 13 “NOTICE Property damage due to loose power connections Insufficient tightening torques or vibration can result in loose power connections. This can result in damage due to fire, device defects or malfunctions.”
This page summarises what the manufacturer’s manual says about F7901; each statement links to the page it comes from, and quoted lines are copied word for word. It is not a substitute for the manual or for a qualified installer. ManualLib is not affiliated with Siemens. Found a mistake? Report an error.