If after the sale you are not going to won any other assets in Spain, it is advisable to close the Spanish account and collect any balance in the same. With the PoA your solicitor can arrange this as well.
If you are keeping the account open (because you own other properties in Spain or you wish to keep it open) then it is convenient to cancel all direct debits for the utilities / local rates / community fees, to avid that you receive any future bill in the event that the buyer does not make the necessary changes at the relevant bodies.
In any case it is compulsory to inform the community of owners of the sale (and provide them a copy of the sale Deed) and also inform the council/cadaster of the sale (although the Notary usually does this).
On completion, from the sale price, it is usual that the following amounts are held: