Cool air from heat pump
HVA Tech, yah, one outside compressor hooked to three indoor whatever they are called. (as you can see, I'm no DIYer beyond changing a light bulb or something like that. Haven't tried running it with the other two units shut off. I'll try that in the morning when it will be cooler outside. (Now 50 degrees out there and holding at 70 in the house.
Plumber, See above comment about my knowledge of DIY. The installer has done a number of these and the literature he gave me says they have models for 2, 3 and 4 port. Don't know where to find my model number but it should be a 3MXSJVJU. The owner of the company has been out twice to look at it and he talked to the company that makes them and had me pushing buttons and telling him the number of beeps I was getting. Then he said it appeared that the electrician had switched a couple of wires. He went out and swapped them but it didn't seem to change anything. Don't know if he switched them back.