u/Current-Natural-7508

There is a small vent in my bathroom, but nothing happens when I turn on the switch beside the light that would traditionally turn on the bathroom fan. I submitted a maintenance request and the property company told me that the fan should be on a timer that might be in a closet. Lo and behold, I found this in our hall closet. I cannot, however, seem to get it to do anything, even in the on position. How do I use this thing to start my bathroom fan?