BS-100/4 LOOP SCANNER ERROR FAULT

Good day.
I would like to seek help maybe you encounter this fault in your fire alarm system. My fire alarm system is autronica BS100 DYFI. There is a fault appear on the panel everyday during automatic system scan. It said “Loop scanner error” in Loop 00. And as i read in fault message in user manual the reason is loop not connected. But when i testing all detector connected to loop 00 all are working properly.
Hoping someone could help me and i really appreaciate it.
Thank you so much,