Notice the last diagram I sent, it is a simple AC unit outdoors and only has the Yellow and the Common 24 volt wires going to the condensing unit outdoors,
this is what you require to run the heat pump outdoors
Carriers energize the reversing valve in the cool mode, so for heat you don't need the reversing valve energized.
If you have ever get AC mode in the heat mode, simply reverse the Orange wire from O to B, opposite of what it was is.thats the Orange wire going to the condensing unit in the top diagram showing red white yellow and common to the condensing unit in the heat pump example.
So just for now all we care about is getting Yellow and Common to the compressor contactor outdoors.
You need to remove the thermostat from the wall and connect red to yellow at the thermostat's wires, indoors.
Now go outside and see if the contactors sucked in,or better yet have somebody helping you by going outside with a cell phone.
Please do not take this the wrong way,the knowledge required to do the job safely far exceeds the knowledge required to read and follow a diagram.
24v Control wiring while harmless looking and wont shock you, can cause bad things to happen if connected incorrectly.You could damage equipment.
I suggest if changing a thermostat,to check the function of each wire BEFORE you energize a direct short & burn your $thermostat and transformer.
Get an alligator clip lead and clip a 2 amp fuse to the hot lead and test each circuit by connecting "R" to each of the circuits/wires.If the fuse blows instantly then you found the common 24v wire or a shorted circuit/ component.
An assistant is helpful for verifying each function on the outdoor unit,the reversing valve and contactor.
You have the same terminals in 3 places, tstat, air handler, condensing unit.
Red to Red to Red, White to White etc.
All you need to get heat is Red to the Yellow and the Green at the Tstat.
If you walk outside and manually depressed the contactor the unit will be in heat mode, as your units reversing valve is energized in cool mode
So if you have yellow and common going to the compressor contactor outside and the fan running inside (which is Red to Green at stat)
You will have the heat mode!
feel the larger copper tube going into the home, it should be red hot.
The red and white and orange going outside you should worry about after getting the condensing unit running, as it needs to run in heat and cool modes.