Well if the Yobit ZEIT wallet is in maintenance then no you can't currently withdraw those coins to another exchange until YoBit fix their wallet issues. The only other option to get your ZEIT coins out of there is to sell them and then buy Doge coins and then transfer those Doge over to Cryptopia to then buy ZEIT coins from there. I say Doge as you should save in fees and also the transfer would be a lot quicker then using BTC as BTC transactions are taking forever to confirm right now even if people are paying a higher fee.