Why would condensation be dripping from where the gas/refrigerant lines go into my Trane air hanler (split system; air handler is right horizontal)? System appear to be working fine, but am concerned about moisture coming from somewhere other than drip pan or condensation pipe. System is new.

Blocked condensation drain tube.

Double check the drain line may be it stuck up or you can check the insulation of the piping may be it need to re-insulation.