OTIS GEN 2

Please see attached photos. The F5 fuse is blowing intermittently. Have replaced the battery but the fuse still blows.

Do you have any additional ideas as to what may be causing the fuse to blow?

Probably a power failure caused it. Might be an IGBT on drive. IGBT when busted gets circuit shorted

Checked also that the line of f5 is not grounded