These notes are in *addition* to our "How to install CoolBot to a window AC". Basically the set up is exactly the same -- all air conditioners have the same parts. But sometimes pieces on mini-splits are in slightly different locations. So read the window AC set up instructions and then scan through these notes and it will be easier to set up.
**Before you install the Mini-split, look for the a/c thermostat and secondary thermostat, it's a lot easier when it's not mounted on the wall.
- You still stick our FIN sensor into the front fins on the mini-split (just like with the window units)-- but if you have a freeze up problem, then watch how the ice forms and move the sensor to where the ice first starts to form.
Start with the fins sensor near the bottom of the fins, close to the center of the AC. If you see ice forming elsewhere that is where the fins sensor should be placed.
Be really careful about sticking the FIN sensor in the fins, because they can get SLICED on the sharp fins -- so open up a spot in the fins with a screwdriver or pen or pencil and then carefully insert the sensor into that spot, and then gently push the fins back around the sensor so it doesn't fall out.
Just as with a window unit, you only want to push the tip end of the sensor into the fins about 1/4-1/3 of an inch so the tip is full in the fins, but not sticking out the back side of the fins at all.
If you have to change the location of the sensor), it's VERY easy to "bend the fins" back into place after you pull the sensor out.
- Finding the ROOM sensor on the air conditioner is sometimes a bit harder with mini-splits than it is with window units. On window units it's right in the middle of the fins, but on mini-splits it's often on the top back side and it's a bit short.
Sometimes it's hidden inside the plastic casing away from the fins or even just a nub on the board. If you have trouble finding yours (the installer should know where the temperature sensor is located.) Contact us after you've looked really well if you still can't find it and your installer can't point it out to you.
- SECONDARY SENSORS: This is also the same as with window units. It is covered in #3 of our instructions. Some mini-splits have TWO sensors. If you see multiple secondary sensors, just remove the one that is lowest and let it hang (don't attach it to the aluminum foil like I say to do in the instructions, that is unnecessary).
They are attached to coolant pipes and easy to find if you have them. In our instructions for window units I say that the sensors are put into COPPER CUPS attached the the coolant pipes. That's true with some brands of mini-splits, but more often I've seen that they are attached to the coolant pipes with plastic "wire ties".
You might not even have one! But if you hook it up and it's not getting very cold, or it's happening VERY slowly then it's worth looking to see if you do. That's it!