When our sister was talking about installing a ductless mini split in her beach house by himself, I thought she was crazy. She was getting a more than three zone ductless mini split which I thought looked like a lot of work. She diagnosed everything in addition to got the first zone hooked up along with the power. She was surprised when she turned it on in addition to it didn’t seem to be working correctly. She said she was sure that you could operate the ductless mini split without having the rest of the zones hooked up just yet. I thought that didn’t sound right so I looked into it myself. When I looked into it in addition to found her particular make in addition to model, I l acquired that it was possible to install just a couple of zones instead of all of them. If you choose to go that route, I don’t think you can add another zone at a later time, although I could be wrong about that. I suppose you would be able to but you might have to add extra refrigerant to the lines. It was a close call because I think she could have ruined her condenser for sure. It even said on the condenser not to run the unit without opening all the refrigerant lines, including the master line which she overlooked. All the videos she watched were for units that were single zone, but the multi zones were a little uncommon with that master valve. She ended up installing the rest of the zones which was a lot of work, in addition to then she had perfectly cool air from all the units when she finally opened all the refrigerant lines. She thanked me for looking out for him, although I still worry that her component could be injured. I also know her warranty is void because she is not an HVAC professional.