Maybe manualslib.com will have the PDF manual.
SOURCE: please i need a programming manual for KEB COMBIVERT F4 INVERTER
For some time internal battery & main battery line disconnect you.so automatic reset.
SOURCE: F5 KEB inverter nop problem
If using bus communications (Can, ProFi, Mod, ext), there may be a communications command (Software signal) that is not being provided. Hardware and software enable signal required to obtain LS.
Possible that the terminal on the control card is bad due to miss connection or signals outside of the rated value.
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