This is a very common mistake people make. You are actually better off storing your wine in a higher than ideal temperature at stable conditions rather than using a conventional air conditioner.

Why?

Firstly a conventional air conditioner chills and recycles air into the cellar dropping its temperature by around 15 degrees C. This cold air landing on your precious wine shocks it every time it cycles. It is just as bad for the wine as heat is. This is not what happens in a cave. A cave maintains constant stable conditions. Our Fondis Winemaster machines simulate cave conditions with a very soft form of temperature control not shocking the wine with very cold air. 

The air off a conventional air conditioner also overly dries the air dropping the humidity in the cellar and drying the corks causing shrinkage which in turn leads to leakage and spoilage of your wine.

The other main reason why a conventional air conditioner is no good is that wine under cork breathes through the cork and releases acidic vapors into the air which in turn gets blown over the gas cooling evaporator coil causing gas leaks. All of our Fondis Winemaster cellar conditioners have three special protective coatings on the cooling coils that protects against gas leaks from acidic pitting of the refrigeration system .