The issue is the placement of the units. There are two viable options:
- Place it in the kitchen (as shown in yellow).
- Place it in the living room (as shown in orange).
Aesthetically, it would be better to place it in the kitchen as the outer unit would sit in the distant corner of the balcony. However, that corner gets a direct sunshine in the afternoon, whereas the other side is already quite in a shadow in the afternoon. (Note that the outer unit should sit on the balcony floor and not be suspended as there's thick thermal insulation which should be touched as little as possible.)
My question is: how much does the direct sunshine decrease the AC efficiency?