Based on standard documentation for this model, the manual typically covers: Machine Setup
often list original physical manuals for sale, which sometimes include original purchase invoices. Key Instructions typically found in the manual: Needle Selection: manual sigma modelo 161 pdf
A: The manual states this is a "Ground-When-Locked" error. You likely have a blown fuse in the alarm's backup battery line (Position 4 on the harness). Based on standard documentation for this model, the
According to traditional instructional guidelines for Sigma and similar vintage machines: manual sigma modelo 161 pdf