Budburma, I faced this some time ago. When the manufacturer could not or would not tell me the direction of the fuses, I used a meter to find the side of the fuse with the least resistance to the hot pin of the IEC. I figured that the direction of the fuse was from this side to the other. One manufacturer suggested that most designers used this convention.
It is still a pain to do but better than to have to switch each fuse and listen and on and on.
It is still a pain to do but better than to have to switch each fuse and listen and on and on.