For full technical specs and other Information, please refer to the pdhvac website. Pioneer's newest WYS series wall mount mini split ductless Inverter+ air conditioning and heat pump system allows heating or cooling any contiguous area, quietly, effectively and efficiently. Pioneer brand WYS series ductless split heat pump is a DC Inverter driven system with variable speed compressor, providing very high efficiency levels. Included wireless remote digital controller allows the users easily select among the 4 operating modes; cooling, heating, dehumidification and ventilation. Additionally, an automatic switch-over mode is available for totally automatic operation through its onboard computer. A timer function allows the user to set the system to start or stop running at a certain time. Night mode function automatically adopts the temperature settings to the naturally changing body temperature levels during the night. Auto restart function memorizes all settings in case of a temporary power failure and restarts the system to continue running the same way after the power is reconnected. An optional Cloud programmable wireless Internet remote access function is also available. Smart buyers choose Pioneer brand DC Inverter+ split systems for their top quality, reliability and performance, available at extremely affordable prices.
Cooling capacity: 12,000 BTU/H with 19.5 SEER efficiency
Heating capacity: 12,000 BTU/H with 9.5 HSPF efficiency
Voltage: 110~120V, 60Hz, 1Ph
Complete system set including: indoor (fan coil) section, outdoor (condenser) section, wireless remote controller with optional Wi-Fi, 16 ft. L line set with other installation accessories
Unsurpassed support hotline covering installation, use, troubleshooting, warranty and parts issues
Same or next day shipping via freight carriers to anywhere in the continental US for arrivals within 3-10 days
Pioneer is the best choice for pros and homeowners with the highest ratings for consumer satisfaction
Certified by: ETL, AHRI, DOE for safety, performance and efficiency
WYS product family is available in different capacities from 9,000 BTU/hr to 36,000 BTU/hr for various residential and light commercial applications
Built with the latest technologies using pulse width modulation driven DC inverter compressor and variable speed DC inverter fan motors for high performance and low power consumption
R410A pre-charged outdoor unit, accommodating line lengths up to 25 ft. long
Auto cool,Defrost,Fan only option,Overload protection,Programmable,Sleep setting,Wifi,Wireless remote control
Minimum Outdoor Temperature (F)
Number of cool settings
Number of Fan Speeds
Warranty / Certifications
Certifications and Listings
AHRI Certified,ETL Listed,ISO Certified
Five year parts warranty covering all components, upon proper registration after installation.
Seasonal Energy Efficiency Ratio (SEER)
Questions & Answers
Typical questions asked about products:
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out of 459 reviews
83% recommend this product
Showing 1-10 of 459 reviews
Aug 26, 2021
P1 and E1 error codes after 2 years.
Operated perfectly up until this past Monday. Unit no longer cools to desired setting. A tech from A.B. May came out and found that the unit had a singed system board. $800 just for the board. May also need freon.
May 27, 2021
Great performing and quiet unit. Temp control could be a little less lazy.
I DIY installed this one. It was overall pretty straightforward but it definitely is a more advanced skill level. I have a background in automotive a/c so I own a vacuum pump and understood what to do. I also had to reflare the lines because on the indoor unit side, the lengths are uneven so you don't have both connections at the same place, which makes sense because it would make it hard to stuff into a lineset cover if they were both at the same spot. The problem is that the lineset was backwards from the lines coming from the air handler. For example, the air handler had a short suction line and a long discharge line. The lineset should have a long suction line and a short discharge line so everything meets up. Well the lineset had the long discharge line so the suction line wouldn't meet. That was dumb, but fortunately I have the correct flaring tool so I was able to correct it. Also took a few feet off the other side for the condenser unit since I didn't need quite 16 ft and didn't want to do something like coil the line behind the unit.
As far as performance. It's fantastic. I installed it in early spring and we had some chilly days so I actually got to use the heating function first. It heats well but we're talking about days in the high 30's/ low 40's. One word of note is that for the heating function. you kinda have to use the follow-me function on the remote because without it, it senses indoor temp from the air intake at the top of the unit. Hot air rises. See the problem? The heat it's producing rises to the top of the room and makes it think the room is warmer than it is, ending the heating cycle before the actual room is heated.
For cooling we've had a few days in the 90's already and it has absolutely no issue cooling my entire 800sqft first floor without breaking a sweat. There is one issue that is somewhat annoying, in that it either overcools or undercools depending on what it feels like. Usually by 2 degrees. If I have it set to 77F, it will allow cooling to as low as 75F (even with follow me enabled). Or sometimes if it's satisfied and it turns the compressor off it will sometimes let the temp get as high as 79F before it starts cooling again. This 4F swing may not seem like a lot but I can definitely feel it. The unit knows what the temp is because this is what its reporting via it's own app. I have a Midea (yes this Pioneer unit is manufactured by Midea. Everything is) inverter window-ac which is very similar in operation to this mini split and it does the exact same thing. This is just how they have their temperature controlled strategy programmed.
A few more notes for the nerdy or anyone deep into home automation. There is an optional wifi dongle available for it for control through the Midea app. I actually already had two of these dongles because 2 other window a/c's I have came with them (also both manufactured by Midea). They're OSK103 dongles. I plugged it into the Pioneer and it works. Here's where it gets interesting. Despite what it looks like it's not a USB stick rather it's a serial UART connection. There's an open source project that allows you to use a software package called ESPHome on ESP8266/32 wifi microcontrollers that allow you to bypass the Midea app altogether and use it in Home Assistant. I tried it and it actually works great. Through some automation programming I should be able to work around the above mentioned temp control issues by shutting the unit off if it starts acting dumb and overcooling the room.
15 people found this helpful
Mar 1, 2021
This is an amazing mini split, and the price is fantastic. If you have a little DIY abilities, j...
This is an amazing mini split, and the price is fantastic. If you have a little DIY abilities, just watch a video setup and thoroughly read the instructions and you should be good to go. Make sure you pick up a vacuum pump and manifold. One thing I wish I purchased was a pipe bender, I used the coil springs and it was a lot of work. Also, grab a disconnect box, and a AC pad.
6 people found this helpful
Dec 4, 2020
1 person found this helpful
Nov 14, 2020
I installed this unit this summer in my garage. It...
I installed this unit this summer in my garage. It is roughly 1000sqf and it cools it very well even in the 100 degree heat. Now that temperatures are dropping, I’m able to keep an ambient temperature at all times. Very quiet, and easy to install. I did have to hire an electrician do the electrical portion. Very pleased with it so far.
7 people found this helpful
Aug 4, 2020
The unit is extremely quiet and seems efficient. While the directions are a little lacking, the ...
The unit is extremely quiet and seems efficient. While the directions are a little lacking, the installation is relatively straightforward. The only reason I didn't give it five stars, is in comparison to the 3rd generation Mr Cool in our garage the Mr cool has more features and the installation kit a little nicer. I would buy this again.
6 people found this helpful
Jul 30, 2020
Simple ice cold silence unit
Simple ice cold silence unit
2 people found this helpful
Jul 17, 2020
Installed a month ago by myself in an area above the garage in our house that gets very hot due t...
Installed a month ago by myself in an area above the garage in our house that gets very hot due to solar heating in the sunny Colorado summer. Previously we had both a window ac and a floor ac units which were loud and cumbersome and less effective. This mini split is almost silent and keeps the 600 sq foot area very comfortable. I have been keeping in set on 75, fan set on AUTO and it rarely runs above the lowest fan setting to keep the area cool in the 90* degree temps we've been having lately.
Installation is straight forward, care is required in working with the copper lines and a small vacuum pump is required to evacuate the lines once connected, but the condenser unit is precharged with all the refrigerant needed. I added a conduit kit to cover the exterior lines.
Everything else required was included in the kit, well packaged and instructions are pretty thorough. The folks at our local Home Depot are very helpful and knowledgable here in Boulder Colorado.
12 people found this helpful
Jul 14, 2020
Some knowing reoccurring to do yourself So far it pass my expectation I been working for a month ...
Some knowing reoccurring to do yourself So far it pass my expectation I been working for a month now and it working great. I'll update in a year Thanks
5 people found this helpful
Jun 10, 2020
Runs way quite than any window units I've owned.. Easier to install than expected. I was nervou...
Runs way quite than any window units I've owned.. Easier to install than expected. I was nervous about opening the ports letting the coolant into the line and it leaking out, but it was fine. Only issue was the installing of the diconnect using 3/4 " flex conduit and the unit only accepted 1/2 ". I am planning on buying a 24k or bigger for larger room with a loft.
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