Hi Paul
No you cannot 'overide' the timers, but you can push the button just like anyone else.
But why would you want to run the air con for more than two hours in one go anyway?
If you feel the need to hide up in the apartment/villa and run the air con for hours on end, then Turkey in high season may not be the place for you.
The people who install the timers might be able to help you more
Regards
Colin and Denise