How can I repair leak from air conditioner condensation?

The evaporator coil is very cold, which causes water to condense on it's surface, like how water condenses on the outside of a cold soda can. The water runs to a drain pan at the bottom of the coil and then flows outside your home via a drain pipe. Perhaps you have a clogged drain pipe? If so you should get it fixed immediately.

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There are many reasons why an ac unit does not work properly: its temperature control may be set too high or too low; it may have lost some or all of its refrigerant because of a leak in the system; its compressor pump may have stopped working properly; etc.

If you cannot see anything obviously "set wrong" the best advice anyone should give you is to call a licensed Heating, Ventilation and Air Conditioning (HVAC) technician to advise you and/or fix it for you.

If the problem really is as simple as you describe - that you're getting excess condensation so you have to empty the collector pans every 10 minutes - it may not cost much to fix.