Аннотация:Using incoherent multiple Andreev reflection effect spectroscopy, the gap structure of superconducting (K0.8Na0.2)0.8Fe1.6Se2 (the 122-Se family) and the temperature evolution of the features caused by Andreev transport in I(V) and dI(V)/dV curves of planar SnS-contacts formed in this compound: the Andreev excess current I^A_{exc}(T) at eV >> 2Δ and the Andreev zero-bias conductance G^A_{ZBC}(T) are studied for the first time. The magnitude of the superconducting order parameter Δ(0) ≈ 5.3 meV is determined. The possibility of describing the obtained results within the available theoretical models is discussed.