The ornamental design for an airconditionercover, as shown and described.
FIG. 1 is a perspective front and side view showing my new design;
FIG. 2 is a front view of FIG. 1;
FIG. 3 is a top view of FIG. 1;
FIG. 4 is a rear view showing of FIG. 1; and,
FIG. 5 is a side view of FIG. 1.
The broken lines are included for the purpose of illustrating environmental structure and form no part of the claimed designs used in FIGS. 1-5. The elements of the claim are shown separated for ease and clarity of illustration. The mesh representation included in FIGS. 1, 2 and 4, continues over the entire surface of the figures shown.