Siman 528

Yom tov does not require eruvei chatzerot or shitufei mevo'ot, for hotza'ah was permitted on yom tov. And even though there is one who says that it would be proper to do so even on yom tov, regarding carrying something for which there is no need at all—as I wrote in siman 518—the custom is not so. And only on Erev Pesach, when they set an eruv for the entire year, would it be proper to mention yom tov as well, as I wrote there. And if it happened that one set an eruv for yom tov, it is effective for Shabbat as well (Magen Avraham subsection 1). However, eruvei techumin are required for yom tov just as for Shabbat. And above in siman 416 it was explained regarding techumin on a yom tov adjacent to Shabbat what its law is, whether one must specifically set an eruv for both of them or not. See there.

A Yom Tov that falls on the eve of Shabbat – one may not establish an eruv with it, neither eruvei chatzerot nor eruvei techumin, as it appears like one who is repairing something. And there is one who wishes to say that if he placed an eruv tavshilin – it is permitted, for behold, all needs of Shabbat are performed on it (Hagahot Ashri). And there are those who disagree (Ran, chapter two), for this is not related to eruv tavshilin, and our teacher, the Rema, ruled accordingly. However, one may establish an eruv on condition during the two days of Yom Tov of the Diaspora, when they fall on Thursday and Friday and he remembered on the first day, according to the condition of the eruv tavshilin in the previous siman. And this is regarding eruvei chatzerot, but eruvei techumin even with a condition is forbidden, because this is like acquiring a place of residence on Yom Tov and it is forbidden.