In the present work the $Y(4260)$ resonance is considered as a weakly bound state of a pseudoscalar $D$ and an axial $D_1$ charm meson. We consider the two-body decay $Y(4260)\to Z_c(3900{)}^{\pm }+{\pi }^{\mp }$, where $Z_c(3900{)}^{\pm }$ is treated as hadron molecule as well. Moreover we compute the $Y(4260)$ decay modes $J/\psi {\pi }^{+}{\pi }^{-}$, recently observed by the BESIII Collaboration, and $\psi (2S){\pi }^{+}{\pi }^{-}$. In the last process both the contact diagram with $D{D}_1\to \psi (nS){\pi }^{+}{\pi }^{-}$ and the resonance diagram with $D{D}_1\to Z_c(3900{)}^{\pm }+{\pi }^{\mp }\to \psi (nS){\pi }^{+}{\pi }^{-}$ are taken into account.

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