I am a builder and I have a home with multiple Daikin units in it. After several years of operation they have all in a relativly short period of time developed leaks in the cooling coils and the outdoor units. My HVAC guy is saying that they appear to be rotting from the inside out. Speaking with Daikin they think that moisture was present inside the system and this over time has caused acid build up that has caused the leaks. This seems odd to me - my HVAC guys says no way no way no way moisture got inside. If this happend to one unit I could see but all (5) seems like something is up. Note that they are not connected in any way they are all seperate. Does anyone have any idea what my issue is? Has anyone heard of this anyplace else? Any help would be greatly appricaited.