Fault codeF7800
No power unit is detected or its parameters cannot be read. The manual's first action is: “• Carry out a POWER ON (power off/on) for all components. • Change the module.”
- Model
- Siemens SINAMICS V90, SIMOTICS S-1FL6
- Display shows
- Drive: No power unit present (F7800)
- Type
- Fault code
- Source
- Manual p. 297
What F7800 means
Drive: No power unit present p. 297
Common causes
- The power unit parameters cannot be read or no parameters are stored in the power unit. p. 297
What to do
- • Carry out a POWER ON (power off/on) for all components. • Change the module. p. 297
Before you service the product, read the safety instructions in the manual p. 2.
If F7800 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 F7800; 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.