How can I get my fan oven to heat again?

The electricity tripped, switched it back on, fan oven not heating, tried several times to push the buttons, still no heat, although the normal oven heats ok. What do you suggest, I do not have a manual in English, I live in Portugal, please advise, would be grateful.

Built in Wall Oven, Zanussi, Model ZOB 891X, Nos; on oven unit:
4512784 994971147 655508 - Linea 08