I am going to a building tomorrow with carrier CCN controls.2 story building, fan powered VAV's. The system was installed around 1991.
Someone decided to cut 2 zone sensors out of the wall. ( construction job) They rewired the sensors to the wire. Now the hole building has no A/C.
My boss is giving me the software and a laptop tomorrow morning for the job. I dont have much DDC experience. I dont now where to start. Could they have shorted some of the mother boards?