The ornamental design for a controller for air-conditioner, as shown and described.
FIG. 1 is a perspective view of a controller for air-conditioner showing my new design;
FIG. 2 is a front view thereof;
FIG. 3 is a rear view thereof;
FIG. 4 is a plan view thereof;
FIG. 5 is a bottom view thereof;
FIG. 6 is a left side view thereof;
FIG. 7 is a right side view thereof; and,
FIG. 8 is a cross sectional view thereof taken along line 8-8 in FIG. 2 wherein the broken lines shown are for illustrative purposes only and form no part of the claimed design. FIG. 8 is included for the purpose of showing external surface contours which may not be clear from the remaining illustrations. Any features of internal construction shown are incidental and form no part of the claimed design.