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Recently went to trouble shoot the air conditioners at one of the places my daughter works. Installed last fall, but not used until this spring. None of them (12 of them, individual units) was working...
None of them had any refrigerant charge. How's that again? Further sleuthing found... every single one had a pipe joint which hadn't been soldered. Same joint on every single unit.
So much for robotic assembly, eh wot?
Soldered up and recharged. Fingers crossed for tomorrow morning...
Building superintendent/caretaker, 7200 sq. ft. historic house museum with dependencies in New England.
Hoffman Equipped System (all original except boiler), Weil-Mclain 580, 2.75 gph Carlin, Vapourstat 0.5 -- 6.0 ounces per square inch