Mini split Wiring help please

Hello,
I built an addition and installed a Mitisbishi Mini split system, 9,000 BTU, 3/4 Ton.
I'm familar with wiring concepts, but I have to admit I'm a bit perplexed at the wiring instructions included with the unit.
I have a 14/2 wire connecting to the Outdoor compresser and connecting the outdoor to the indoor is something I'm confused about.
The instructions show basically four lines, S1, S2, S3 and a ground wire going between the two units. I'm not clear if I should be using 2 separate wires here and I can't understand how a 14/2 wire can hook up to 4 different connectors.
The instructions go on to say that I need to use AWG22 wire for teh 12-24V DC. What's even more confusing is that it's saying S1 and S2 should be 208/230V AC 1 phase, 60V, but then it goes on to say that S2 (again) and S3 should be DC12-24V....
How can S2 be both? What exact sort of wire(s) should I be using between the two units? Any help would be huge! Thanks
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Aside from all the replies in here, the correct wire to use between the outdoor and indoor unit is 14/5 and is available from the supply house where you bought the unit. If not, Johnstone carries it. Yes, 14 guage, 5 conductor wire. It is made for this application and meets code as well as manufacturer's specification (which sometimes is the code).
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