Traduzione in corso passo 4
As you can see here, the fuse was blown. The filament is broken internally.
Since this was the case, the fuse was replaced. The tachometer returned to normal function indicating that the fuse was the problem.
If the fuse continues to blow, the OVP relay may need to be replaced. If the fuse is not blow, you may need to test and/or replace the OVP relay.