For information on disassembling the indoor unit of your WYS system, open the PDF instructions in the article.

<p id="isPasted">For information on disassembling the indoor unit of your WYS system<span style="font-size: 16px;">, use these PDF instructions:</span></p><div class="fr-deletable gorgias-file-attachment__wrapper" contenteditable="false"><div><i class="material-icons">attach_file</i> <a class="gorgias-file-attachment__anchor-name" href="https://attachments.gorgias.help/Q9r0k7BYaV2vg13y/hc/9JWjXVxG8m6DvMqm/2025060212-4dba8935-fa22-438f-bc24-eaf4e27e7ac8-wys%20series%20pioneer%20mini%20split%20indoor%20air%20handler%20-%20disassembly%20guide.pdf" target="_blank" rel="noopener noreferrer">WYS Series Pioneer Mini Split Indoor Air Handler - Disassembly Guide.pdf</a> <span class="gorgias-file-attachment__span-size">1.3MB</span></div><i class="material-icons gorgias-file-attachment__close-icon">close</i></div><p><img src="https://attachments.gorgias.help/Q9r0k7BYaV2vg13y/hc/9JWjXVxG8m6DvMqm/2025060212-5fe14223-b160-4ea4-9257-d977e6421a62-a22505ff-cea8-4068-a545-7dce9a6cc251.png" id="isPasted" class="fr-fic fr-dib" style="width: 400px;"></p><p>In addition to the PDF instructions, you can use this video tutorial to learn how to open the inside unit and replace the fan motor:</p><p><span contenteditable="false" draggable="true" class="fr-video fr-deletable fr-rv fr-fvc fr-dvb fr-draggable"><iframe width="100%" src="https://www.youtube.com/embed/6IE7u6bfJZE?&amp;wmode=opaque&amp;rel=0" frameborder="0" allowfullscreen class="fr-draggable"><span class="fr-mk" style="display: none;">&#xA0;</span><span class="fr-mk" style="display: none;">&#xA0;</span></iframe></span></p><p><br></p>

Disassemble the WYS system inside unit

For information on disassembling the outside unit of your WYS system, open the PDF instructions in the article.

<p>For information on disassembling the outside unit of your WYS system, use these PDF instructions:</p><div class="fr-deletable gorgias-file-attachment__wrapper" contenteditable="false"><div><i class="material-icons">attach_file</i> <a class="gorgias-file-attachment__anchor-name" href="https://attachments.gorgias.help/Q9r0k7BYaV2vg13y/hc/9JWjXVxG8m6DvMqm/2025060213-89bcf246-dd19-44e5-8ba7-baa765c03675-wys%20series%20pioneer%20mini%20split%20outdoor%20unit%20-%20disassembly%20guide.pdf" target="_blank" rel="noopener noreferrer">WYS Series Pioneer Mini Split Outdoor Unit - Disassembly Guide.pdf</a> <span class="gorgias-file-attachment__span-size">2.1MB</span></div><i class="material-icons gorgias-file-attachment__close-icon">close</i></div><p><img src="https://attachments.gorgias.help/Q9r0k7BYaV2vg13y/hc/9JWjXVxG8m6DvMqm/2025060213-970eeb4f-d426-4d04-a5cc-e22c04997b5c-wys_outdoor_unit_disassembly.png" style="width: 400px;" class="fr-fic fr-dib"></p>

Disassemble the WYS system outside unit

The WYS Wall Mounted systems have mechanized up-down (horizontal) louvers, allowing users to manipulate airflow output.

<h2 id="isPasted"><u>Introduction</u></h2><p>The WYS Wall Mounted systems have mechanized up-down (horizontal) louvers, allowing users to manipulate airflow output.</p><p>In addition to the up-down louver, the system usually has 3 to 4 side-to-side (vertical) flaps. You can manually adjust the side-to-side flaps to direct airflow to certain angles.</p><p>If you&apos;re checking for weak airflow, confirm no restrictions are present in the side-to-side flaps. Setting the side-to-side flaps straight or to the middle ensures maximal air output.</p><h2 id="isPasted"><u>Video Tutorial</u></h2><p>Watch this video tutorial demonstrating the adjustable flaps:</p><p><span contenteditable="false" draggable="true" class="fr-video fr-deletable fr-rv fr-fvc fr-dvb fr-draggable"><iframe width="100%" src="https://www.youtube.com/embed/UaTMIWxPpA4?&amp;t=12s&amp;wmode=opaque&amp;rel=0" frameborder="0" allowfullscreen class="fr-draggable"><span class="fr-mk" style="display: none;">&#xA0;</span><span class="fr-mk" style="display: none;">&#xA0;</span><span class="fr-mk" style="display: none;">&#xA0;</span><span class="fr-mk" style="display: none;">&#xA0;</span></iframe></span></p><p>Video length: 0:15</p>

Maximize airflow output for WYS systems

While both models are highly efficient, the Inverter++ (Energy Star™) consumes less electrical power than the Inverter+.

<p id="isPasted"><span style="font-size: 16px;">While both models are highly efficient, the Inverter++ (Energy Star&#x2122;) consumes less electrical power than the Inverter+. Despite consuming less electrical power, the Inverter++ achieves the same capacity and output as the Inverter+ models, helping you save money.</span></p><p><span style="font-size: 16px;">The Inverter++ models also perform better in frigid climates, possessing the ability to continue heating until ambient temperatures reach -13&#xB0;F. The Inverter+ series, which begins losing heating efficiency at around 42&#xB0;F, stops heating at 5&#xB0;F.</span></p>

Understand the difference between Inverter+ and Inverter++ systems

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Support Center

Review these specific technical questions to gain a better understanding of your Pioneer wall-mounted WYS system. Use the Help Center articles and graphics. 

Learn more about your Pioneer WYS wall-mounted system

Products

Quantum Series Systems (WYS/CYB/RYB/UYB/FYB)

Technical Documentation (Quantum Series)

Technical questions regarding WYS wall-mounted systems.

WYS Wall Mounted

When the power goes out, do the units need to be restarted manually?

How Do I Determine the Breaker Size and Wire Needed for a Pioneer HVAC System?

How is the System Powered?

The Indoor Unit Does Not Turn On

Difference Between 120V and 240V Systems

Electrical Related General Queries

Does the Fan Ever Shut Off in Cooling Mode?

Are Pioneer Systems Factory Pre-Charged with Refrigerant?

How to Check the Resistance of a Pioneer Temperature Sensor

I Have a Leak in My System But I Cannot Locate It

How to Locate a Pioneer Model Number or Serial Number

How to Apply Pioneer Flare Leak Guard

Pioneer Lineset Diameter Reference Guide

What Does It Take to Install a Mini Split?

What type of oil is used with the unit?

Why would a ductless mini split freeze up on the inside air handler if its cooling reasonably well, the filters are clean, and the level of refrigerant charge is proper?

HVAC Related General Queries

Can a wall-mounted unit be mounted onto the ceiling instead?

Can the unit be operated without a remote control?

Can the LED Display on the indoor unit be turned off?

Can the line set exit from the side of the indoor unit, rather than the back/through the wall?

Does the indoor unit require anything extra in order to be mounted to the wall?

What is the ideal height for the unit to be mounted at?

What is the weight and dimensions of the indoor unit?

Indoor Unit

Is there a recommended resource to find a professional that is located near me?

Can the line set be angled upward?

What gauge of wire is used for connections between the ductless mini split indoor and outdoor sections?

What hole saw size is needed to drill the wall for accommodating the drain and refrigerant lines?

What is the approximate cost and time spent to have the system installed?

What size torque wrench is needed?

Wire-related questions (Power whip, comms wire)

Who is permitted to install the A/C?

Installation

My Pioneer Wall-Mounted Mini Split is Leaking Water

Plumbing and Drainage Queries

How Can I Access Manuals and Important Technical Documents?

What is the Telephone Number to Receive Tech Support?

Technical Support

General Technical Questions

Can a single zone mini-split be used with multiple indoor units?

Cooling Only Systems

Can I Order Different Lineset Lengths?

Do these Split-Type systems function as dehumidifiers?

Do you carry Hyper-Heat units (-22°F)?

Do you offer any discounts?

Do you Offer Pre-Charged Linesets?

How Can I Obtain Spare Parts?

How Do I Determine the Unit Size I Need for My Space?

How do I find an installer for my Pioneer Mini Split purchase?

How do I make a return?

How do I use my Pioneer Rewards Points when shopping?

All About Energy-Star Tax Credits and Rebates for Pioneer Split Systems

How is power received into the units?

What does “multi-zone” mean?

What is the difference between Inverter+ and Inverter++?

What is the life expectancy of the air conditioner system?

Energy Star Tax Credit / IRS Information FAQ

Which units are rated Energy Star?

About Authorization Charges

Frequently Asked Questions

WHAT TO EXPECT

REFUND ELIGIBILITY

RETURNING AN ITEM

RETURN FEES

RETURN POLICY

STARTING YOUR RETURN

UNDELIVERABLE OR REFUSED SHIPMENTS

Returns and Refunds

Free Shipping

Shipping Details

Shipping and Delivery

Under what conditions am I covered under warranty?

How long is the warranty?

Warranty

Online Shopping

Error Code E0

Error Code FY

Indoor Unit Displaying 0A/OA

Error Code Troubleshooting (Diamante Series)

Wall Mounted WYT-19 Diamante Pro Series

Wall Mounted WYT-22 Diamante Ultra Series

Technical Documentation (Diamante Series)

Connecting a Diamante Pro/Ultra (WYT-19/WYT-22) to Pioneer Airlink

Integrating Pioneer Airlink with Apple Smart Home

Connecting a Diamante Pro WYT-19 to Pioneer Airlink

Connecting a Diamante Ultra WYT-22 to Pioneer Airlink

Pioneer Airlink App

Diamante Series Systems (WYT-19, WYT-22)

How do the Cased A-Coils work?

Technical Documentation (DYR Series)

Ducted Central Split DYR Series

Error Code E1 / EL 01 (EL01)

Error Code EL 0C (EL0C, ELOC, EL OC)

Error Code P0 (PC00)

Error Code PC 03 (PC03)

LCAC (FYB/CYB/UYB/RYB) Error Code Interpretation

Error Code Troubleshooting (Quantum Series)

CYB, RYB, and UYB Systems: Connect with the NetHome Plus app

WYS-20 and WYS-22 Systems: Connect with the NetHome Plus app

NetHome Plus

Switch between °F and °C on the RG10 remote

How do I switch between °F and °C on the RG10 remote?

RG10 Remote

CYB Ceiling Cassette

RYB Ceiling Concealed