Hi and Merry Christmas to all

I work for a company in Mozambique that does air conditioning work.

At 2 diferent sites we are facing the same problem:

in the server rooms, normal wall split units were installed and the users run them all the time at 16ºC. The sution line, although well insulated with armaflex is always condensating, creating drops on ceiling. We replaced the inslation but it is still doing the same thing.

Is this a insulation problem of the piping or can be related with the fact that the ac split units are runing at 16ºC?