Yobit has many wallets on "maintenance", simply means they do not allow you to cash in/out. These are mostly PoS coins where they stake them for themselves without paying out the rewards, like IFLT, PIVX, others.
So can IFLT withdraw/depos be done on Yoshit?
Good question. Sometimes I remember they used to cycle the wallets, so if you send a deposit, it might show up in a month.