I assume rather than just letting us all know your aircon is leaking, you are looking for some guidance on why that may be happening.
It would help people assist you if you could give a bit more information. Such things as model, age and if it is leaking during operation or only when it rains may get more of a response.
As I am not very technically minded, I would suggest you take it to a local repairer, after contacting the manufacturer of the unit to find one local to Townsville.
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Regards Ian
Chaos, mayhem, confusion. Good my job here is done
If you are saying that water drips down over the outside of your van when it is operating, this is normal. Its just condensation off the condenser, same thing happens at home, except your home aircon has a drain pipe for the condensate, and you don't see it.