Looking at the keg beer remote cooler, firstly see if you can see where the water is coming from. If it is leaking generally from the bottom of the machine, you need to send for your local technician.
If however you see the water is running out of a tube, which is situated, on one of the sides of the machine near the top, then this is perfectly normal. This water is meant to escape from the machine as overflow, due to the continual cycling of the ice within the unit.
Also some small amounts of water on or around the top of the remote can be expected, and is the result of condensation on the python. If in doubt it is always best to send for your local technician.