Pioneer Air Conditioner WYS012A-20 Wall Mount Ductless Inverter+ Mini Split Heat Pump, 12000 BTU-110/120V

I hate people telling me what I can't do. I want to live in a society that is always trying to help others do everything, from medical help to "holier than thou" HVAC work. Programmers have put open source software into everything like TVs, refrigerators, thermostats, electrical grids, airplanes, and everything else digital. Why can all other professions have the same sharing attitude?I decided to install this myself in a small, 720 square foot decently well insulated home. This was my first time ever working with HVAC and so far it seems to have worked great. It cools off beautifully.The first thing I have to say is that the instructions are written very well. The only part that seemed understated was the head unit wiring. It's not hard but I didn't find the instructions clear on my particular model.I had trouble pumping a vacuum during my "tests" before install. I didn't even come close to tightening the copper properly. The instructions warned several times about "over tightening". I waaay under tightened. With the proper torch with a torch wrench, I had no problems. I pulled a vacuum, waited for a half hour, and filled the system with refrigerate as directed by the instructions. It worked great.Running the copper lines is the most difficult and nervous part. I was very careful, and I recommend two people help with this.The instructions are great. But there are a few things that caught me by surprise:- The indoor unit just clings onto the bracket. If feels strange, but it looks great.- The drain line seems a little short still.- It came with a small bag of "plastic" something and I have no idea what that is for. The instruction made no mention.My local discount tool place sells torch wrenches for $20 and crow foot wrench heads. You need a large head ( I believe 1") for the large line. The only place I can find that sells those is Amazon. Search for Crowfoot Wrench Set. Should run about $20. ***You need this!*** Since the heat pump mode operates at a high pressure, it's very important that it's properly tightened.- AC Refrigeration Pump (can be bought on Amazon for about $130)- Mini Split adapter fitting. (the pump is usually a different size then minisplit) ($15)-Torch Wrench ($20)-Crow Foot Wrench Set ($20) *You need this*- HVAC flaring Kit ($35)- Hole Saw ($20)- Pipe cutter (for copper) ($10)- Condenser bracket/Mounting bracket or pad ($45)- Line cover kit ($45)- Electrical AC disconnect ($10)- Electrical wire- Pipe sealant suitable for HVAC lines. ($8)So your'e looking at around $350 if you were to buy all the extra tools and parts yourself. The electrical, with a shutoff by the unit costs about $30 for all the parts and wiring.I've been running it on "eco" mode and it keeps the place cool on 100 degree days. I can easily get the house down to 67 if I crank the system on high.And that's it! I'm happy so far, seems very well engineered.

I had some concerns about using this air conditioner on a mobile trailer. Those concerns have been laid to rest. I am happy to say it has worked perfectly. The install went smoothly using the direction provided. The quality of the product is top notch.When I started looking into using this I had some question so I'm going to answer them in case anyone had the same question.1. How loud is this unit?Answer: You can't even hear it run unless the room is dead silent. It is literally the quietest air conditioner I have ever heard. Even the lightest sleeper will never noticed when this thing comes on at night.2. How many amps does it use?This was my biggest question since I was using a inverter generator to power it. At it's maximum it uses 10.5 amps. My generator has a screen with amps and volts on it. The best part about this air conditioner is that there is not spike when the unit comes on. When first started it uses about 4 amps. As the compressor speeds up the amps used slowly go up until it maxes out. With most air conditioning units there is a big spike when the unit kicks on and that requires you to have a much larger generator to handle the surge when it starts. Not this one.3. Will the compressor vibrate a lot while running?I mounted this on a platform on the back of my trailer so I had a concern that the outdoor condenser unit would vibrate and transfer noise into the trailer. It absolutely does not. This thing runs so damn smooth that you can barely feel it running if you put your hand directly on the unit. You can tell this is a quity product the minute you fire it up. I actually got scared at first because I didn't think it was working. That's how quiet it is.I hope this review helps other who are thinking of using this for a tiny house or other trailer application. I wouldn't hesitate to purchase it again. I have even had people comment that they will be buying one when their current A/C goes out. Great product. High quality.

So glad I finally bought this model. It made a huge difference.For years, I had a portable (roll-around) AC unit in my garage work area. It was loud, in the way, and due to its design was sucking air out of the room that it was chilling, pumping hot air out a huge pipe to exhaust the heat. A few months ago, I replaced that with this split AC/heat pump system. I use it to maintain the temperature in a two-car garage workshop. This workspace was insulated as much as possible, so the roll-around unit could keep up, but it struggled.This one does so silently. No matter what the temperature is outside, it keep the inside the desired temperature. The inside head unit is almost dead silent. The outside compressor portion is quiet as can be as well. During the hot Texas summer, it has no problem keeping up, and now during the cold winter nights, it's maintaining the warmth in the room equally well. I'm very impressed. Plus, the entire room feels the same temperature, which wasn't possible with the previous device.Easily controlled with a remote control, I can make the occasional adjustment if need be. I love it. Installation took a few hours, as I had to drill holes through the brick walls of my home.I have zero complaints.

I bought 2 of the Pioneer 12k BTU units for my 5th wheel that I have permanently installed on some property in the high desert. The basement AC in the 5th wheel died. I could not find anyone to come out and work on the AC. No AC companies in town would work on a 5th wheel, and the RV guys wouldn't come out to work on it either. They would only work on it in the shop.So, I realized I would either have to skip another summer or order new ACs. The problem was, as previously mentioned, the AC companies wouldn't work on a 5th wheel, and the RV guys wouldn't come out to work on it. Between that and money being tight, I realized I might have to figure this out myself. I have never worked on HVAC stuff, had no real plumbing experience, but I do know electrical - at least enough to not burn the house down. One out of 3 ain't bad.I researched my options and found that a mini split would be best for my situation. I landed on the Pioneer after I read the reviews and watched a lot of YouTube vids to see which ones would be in my installation skill set...or at least close.The 2 units arrived in several boxes, not too heavy that I couldn't lift them all myself (one at a time of course). I installed them in my 5th wheel over a period of about 2 weekends - there was a hiccup in the time frame for a missing part - a VERY important part - the adapter for using the vacuum pump on the system. Research that and don't forget to get it! It's the "Wadoy R410a Adapter for Mini Split HVAC System 5/16" Female Quick Couplers x 1/4" Male Flare." The part is on Amazon for $9.58. I would have certainly paid 10-15 more bucks to have the whole kit needed to finish the job. The lack of the inclusion of that very simple part is a contributing factor to my 4 star v 5 star decision.I finished the job JUST before it got really hot - well, mostly finished. I still have to do the moldings over the external hoses. The problem is that it got TOO HOT to work. Temps have been at 105-108, and I just can't work in that heat. Call me a baby if you want - I call it old. :)Also, don't forget I installed TWO of them. That's twice as much work for those of you who weren't following along. ;)I have a 5th wheel with an upper bedroom/bath combo (bed is a slide out), and a kitchen/living area with 2 opposing slides. I installed the blower units inside the coach across from the bed on the curb side wall, and the other on the rear wall of the unit. The compressor unit was outside to the rear of the coach, and the other parallel to the side of the trailer near the landing gear.The install was pretty simple. I ran into some issues with the hoses being hard to bend without kinking them. I had some twists and turns that were difficult to work through, but I did it without damaging the pipes. I found the connectors inside the unit for the power to be inadequate. They felt cheap and I worried about being too forceful with them. The instructions were written well enough to understand them and it made the install easy.We have now been through 2 really hot weekends. Highs were 105-108. This 5th wheel sits out in the middle of the desert with NO shade. We get some shade in the early evening when the sun sets over some hills, but that's about it. These AC units work fantastic. My bedroom area held the preset temp of 75 degrees on the hottest day, and the living area was kept a comfortable 80 degrees. The turbo mode worked very nicely, as did the follow me feature. I did not like that the remotes were IR and not RF. They need line of sight and can be a little finicky. Also, the remotes are not specific to the unit. Should you somehow go line of sight to two of the units, that could change the settings on both. This is another of the factors that kept the score from 5 stars, and really the biggest. Switch to dedicated RF remotes, Pioneer! ;)These units have performed beyond my expectations. They're quick to cool down the room, they're quiet as can be, and they blow some COLD air. It will be great to be able to visit our property this summer. Last year we couldn't use the 5th wheel due to the lack of AC. I couldn't stand to be in there for more than a few minutes at a time. It would be 110 outside and 120 inside. Yuck!Now, it's icy coldness. Next, it's the electric bill. We'll see how it goes!!!Update 5/4/19:We made it through the entire summer last year using the Pioneer air conditioners. They performed flawlessly. With temperatures nearing a 120ﾟ the inside of the 5th wheel was nice and cool. We also used the machines for heat in the winter time although I don't feel that they perform as well as my Eden Pure space heaters.We're moving into another summer and I look forward to another season of icy coldness.

Bought this unit in mid October of 2019. The weather got super cold too fast for me to install because I worked 9 months straight, 12 hour days, 6am to 6pm and that doesn't leave me feeling motivated or with a lot of daylight to install this thing. Early 2020 I was able to start this as the days were staying brighter later. I followed the install manual to the letter and later had my coworker vac the lines down and open the service ports. After trying this unit for about 20 minutes (fan spinning, compressor never kicked on) the unit began smoking. I quickly pulled the local disconnect and my coworker thought maybe that I had not wired the unit up correctly. This wasn't my first wiring rodeo, but there is always a chance I missed something. Turns out it was all setup correctly. So begins the 5 week email chain (including pictures, etc) back and forth with Parker davis (pioneers parent company) and the communication was abysmal. The guy I was going back and forth with said my email went to his trash bin for some reason. He then said he woyld send me a new pcm board. A month went by with no communication and I contacted him again asking if everything was still a go on the new board. He responded with "yes, the board was on back order and it should be arriving to you within the week.Board arrived. The screw holes were chewed up like they had pulled the board from a used unit (back ordered?) and there were rub marks along the metal on the casing. I installed the new board and we were off to the races. I fired it up and hoped for no smoke. It worked this time, well i mean it didn't smoke this time. The outdoor fan kicked on and went inside. The air seemed cool coming out of the fan, but it was actually just circulating the room temperature air. I tried it in heat mode, the fan reversed and started spinning the other direction (as it is supposed to). The indoor unit fan never turned on, or if it did, it was so slow that I couldn't notice.Called a service tech to come out. He checked all the things that I checked before finally calling tech support. After about an hour of troubleshooting, the tech and the tech support tech deduced that the 4 way valve isn't working properly. So now, i have a new 4 way part on its way for a unit that has never run correctly from day one. The hvac tech said "i can come back and braise this on for you, but it will be a little expensive." I asked about warranty and he said "they will warranty parts, but not service." Less than a year old and I am paying for replacement parts to be installed on a defective unit? Last pioneer I ever deal with. Super disappointed.Fast forward to October of 2020: called customer service and please with them that their product hasn't worked from day one. Asked if there was anything they could do. They checked with their supervisor and offered me a new outdoor unit for around $200 shipped. I accepted and it was delivered in reasonable time. I installed the unit and it works great. It is pretty warm here now and at 77 degrees set point, my garage feels comfortable on hot days. In the winter, I want it to run pretty low. Just cold enough that my outdoor fridge doesn't freeze over. The lowest set point is 62 degrees. So it runs non stop in the winter, but the fridge didn't freeze. Had no issue with snow getting in the way of the outdoor unit and it never had any faults. Ran right through cold and hot temps

Can't wait to test the A/C. So far it works very well on heat. It's so quiet I forget it's on.The only improvement I would make is to give an option for a "turbo" fan speed to move the air quickly for a short time. Otherwise the fan works just fine.Unlike resistive elements, this takes a few minutes to generate heat while the compressor develops pressure. Also, being a heat pump, there is a limit to the total heat output. I live in inland SoCal so it doesn't get super cold so I'll never be able to test the limits of the heat. This summer will be the test of the A/C cycle as we are sure to get several 100+° days. I'll check back with you all then.The remote is a little tricky at first. RTFM and you'll figure out that there are many functions your unit doesn't have but once you get it, it works really well. Also it has excellent range and really doesn't have to point straight at the unit but it does have to have "line of sight" to communicate as it works by infrared. So don't hide it under your pillow ;-)P.S. Thanks to all who included install notes in the reviews. Just match wire for wire and forget about what colors may or may not mean. It's easy.P.P.S. Make sure and have a qualified A/C tech evacuate the line set before releasing the refrigerant. It only cost me $75 and it took about 40 minutes including testing. You can shortcut the process but you will shorten the life and efficiency of the unit.

Product works nice, is quiet, almost very quiet at about 20 dBA, and was straight forward installing it. It took me about 2 days to do it, accommodating the work at it with weather and my busy schedule.Books are good, and have some room for improvement.The outside unit do not have full adapters for High pressure, low pressure measurement, and that will make difficult in the future to control and maintenance for the right amount of refrigerant liquid/agent . Reducing the price by emptying the initially hidden content inside, is not a good practice and I felt frustrated. I will not return the product for this, I hope I may cheat it in the future if some refill might be needed, but would be nice to have all the temperature points and pressure points put in place by the manufacturer, just to connect the service instrumentation directly, and match the manufacturer's data, otherwise that may look fake, or inflated for commercial reasons.Recommendation to manufacturer and seller - put these in place with clear instructions and clear charts...it's the company's prestige!The higher diameter tube, was medium low quality, stiff and difficult to bend without tools, prone to kinks, and the flare sealant proved useful, in spite that at good quality tubing flares have to seal easily; so we got one leak that required some work to eliminate it, with some refrigerant loss from the tubing.Finally everything worked out well and for the moment is functional. The heavy weather did not come yet where to prove its capability in extreme temperatures come yet, as to give a very accurate review.

In total I have purchased 5 of these units through Amazon. They came on a big pallet and were boxed perfectly. They are an amazing deal. I opened up one unit because I thought it was bad. In reality I had a bad neutral wire in the romex wire I ran and the unit was fine. I was very impressed with the components. The wall unit looks very nice. We have a Mitsubishi Mr. Slim at work and its very industrial looking. I think the Pioneer in much better looking and I love the way the LED display shines threw the plastic becoming invisible when you don't want it. It's very quite and sips electricity. I replaced an old central air system with these units and the difference is unbelievable. I went from over a 120 kWh to just above 80 kWh for a day. In my opinion the best thing is being able to cool the bed room at night independently from the rest of the house.Now let's talk about installing these units. (This is just to give you an idea of what it required. It's not a guide.)Apart from the obvious stuff here is some of the things you should plan for.1st. You need to install a breaker for each unit. You absolutely should not do this if you don't know what you are doing.2nd. You need to run the romex wiring to each unit. Your local building codes need to be followed.3rd. You will need a disconnect box at each unit. I got mine at the local big box store. I have seen them as low as 8 bucks. I also bought a whip (flexible shielded wire that goes between the disconnect box and the outside unit) for about $9 each.4th. A bracket or concrete pad to mount the outside unit. I made my brackets myself with some hardware and angle stock from the local metal yard.5th. You need to cut a 2 inch hole through the side of your house. For my wood house I used a hole saw kit from H.F. If you have concrete or brick you may have to rent the tools to cut the hole.6th. Install the line set between the inside and outside units. If you want to cut the lines to the correct size you will need a pipe cutter and a 45 degree flaring tool. I bought this one: "The Rothenberger 222601 Universal Flaring Tool "If you have never done this before watch some YouTube and practice a little.Connecting the copper lines is a critical step. If your system leaks it's most likely one of you connections. I would highly recommend some sealant for your connections. I used this one:"Nylog Gasket/Thread Sealant "Pioneer also sells there own brand of sealent on their website. Be very carful bending the lines. Don't make the bend all in one spot spread it out.7th. You will need to Vacuum out the system to get all the air out of the lines. You will need some AC gauges and a vacuum pump. I got a very nice set a H.F. for about 45 bucks with a 20% off coupon. I also got an adapter for 410A Freon.410A freon adapter: "Yellow Jacket"Vacuum pump: "ZENY vacuum pump"In conclusion this review is for the air conditioning units themselves. Some of the other reviews may have better info in regards to the manufacturer and support.