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<h2 id="isPasted"><u>Introduction</u></h2><p>This article explains how to put a system into Auto mode.&#xA0;</p><p>In Auto mode, the system selects either Cooling, Heating, Fan-Only mode based on the delta-T (&#x25B3;T), which is the difference between the room temperature and set temperature.&#xA0;</p><table style="width: 100%;"><tbody><tr><td style="width: 25%; text-align: center;" class="fr-thick"><strong>&#x25B3;T (RT-ST)</strong><br></td><td style="width: 25%; text-align: center;" class="fr-thick">&#x25B3;T &gt; 2&#xB0;F<br></td><td style="width: 25%; text-align: center;" class="fr-thick">-2&#xB0;F &#x2264; &#x25B3;T &#x2264; 2&#xB0;F</td><td style="width: 25%; text-align: center;" class="fr-thick">&#x25B3;T &lt; 2&#xB0;F<br></td></tr><tr><td style="width: 25%; text-align: center;" class="fr-thick"><strong>&#x2192;MODE</strong></td><td style="width: 25%; text-align: center;" class="fr-thick">Cooling</td><td style="width: 25%; text-align: center;" class="fr-thick">Fan-Only</td><td style="width: 25%; text-align: center;" class="fr-thick">Heating</td></tr></tbody></table><p><br></p><p>This article is for the following units:&#xA0;</p><ul><li>Diamante Essenza (WYT-17)</li><li>Diamante Pro (WYT-20)</li><li>Quantum Ultra High-Wall (WYT-24)</li><li>Quantum Hyperformance (WYT-25)</li><li>Quantum Fresh (WYT-FA)</li><li>Quantum Ultra Ceiling Cassette (CYT-24)</li><li>Quantum Ultra Floor-Ceiling Flex (UYT-24)</li><li>Quantum Ultra Ducted Ceiling Concealed (RYT-24)</li><li>Quantum Ultra Multi-Zone</li></ul><h2 id="steps"><u>Steps</u></h2><p>Follow these steps to activate Auto mode:&#xA0;</p><ol><li>Press the &quot;MODE&quot; button until the cycle symbol appears on the remote controller&apos;s display.&#xA0;</li><li>Use the up and down arrow buttons to set the desired room temperature.&#xA0;</li></ol><p><img src="https://attachments.gorgias.help/Q9r0k7BYaV2vg13y/hc/9JWjXVxG8m6DvMqm/2025112117-3b56acbb-8441-439e-9029-345a1d654319-remote_controller_mode_dry_fanonly_auto.png" style="width: 400px;" class="fr-fic fr-dib fr-bordered"></p><p><br></p>

This article explains how to put a system into Auto mode.

Activate Auto Mode

Operation & Usage

Modes Explained

Pioneer offers hyper-heat units

Pioneer systems offer both heating and cooling functions

Understand the difference between 115V and 230V systems

Understand the refrigerants used for each model

How to Choose a System

Mini splits are capable of using fewer indoor units than the outdoor unit’s zonal capacity

Pioneer mini splits function as dehumidifiers

Pioneer offers different lineset lengths

Pioneer offers pre-charged linesets

Pioneer offers pre-flared linesets

Pioneer systems include factory pre-charged refrigerant

Single-zone mini splits cannot be used with multiple indoor units

Understand the life expectancy of Pioneer systems

Mini-Split Basics

Determine the unit size needed for your space

Match the lineset diameter to your Pioneer indoor unit

Understand why short cycling occurs when sizing systems

Sizing & Efficiency Guide

Start Here

Understand the differences between Inverter+ and Inverter++ systems

Understand the differences between the wall-mounted ductless mini splits

Understand which units are rated Energy-Star

Compare Models

Learn about the discounts available

Learn about the Energy-Star Tax Credits available for Pioneer systems

Learn more about IRA tax credits

Learn why your Pioneer discount code only says "SAMPLE"

Redeem your Pioneer Rewards Points when shopping online

Understand how to manage multiple credit card charges with Pioneer

Financing & Payment

Learn about our shipping and delivery details

Understand the qualifications for free shipping

Order Status & Shipping

Diamante Essenza (WYT-17) Overview

Diamante Pro (WYT-20) Overview

Quantum Ultra - High-Wall (WYT-24) Overview

Quantum Hyperformance (WYT-25) Overview

Quantum Fresh (WYT-FA) Overview

Quantum Ultra - Ceiling Cassette (CYT-24) Overview

Quantum Ultra - Ducted Ceiling Concealed (RYT-24) Overview

Quantum Ultra - Floor-Ceiling Flex (UYT-24) Overview

Vertex Ducted Central Split (DYC-18) Overview

Quantum Ultra - Multi-Zone Overview

Product Line Overviews

Figure out how to start your return

Find out how to complete returns

Learn about our return policy

Learn about our policy for undeliverable or refused shipments

Understand how to return an item

Understand the eligibility requirements for refunds

Understand our return fees

Understand our return process

Returns & Refunds

Shopping & Pre-Purchase

Understand the air duct parameters for panel installation

Cassette Units

Find an installer for your system

Find professionals to install your Pioneer system

Learn who is permitted to install your system

Understand if our systems can be self-installed

Understand the cost and time spent on installing systems

First-Time Setup

Angle linesets upward

Connect the drain hose for LCAC systems

Find out if a wall-mounted indoor unit can be set onto ceilings

Find out if the indoor unit requires anything extra in order to be wall-mounted

Find out the ideal height for mounting indoor units

Learn the gauge of wire used for ductless system connections

Setup the lineset to exit from the side of the indoor unit

Understand 6-foot plastic whips and 4-lead mini split connection wire

Understand the drilling details to accommodate drain and refrigerant lines

Understand the requirements for installing your system

Understand the torque wrench size for installing your system

Installation Requirements

Understand the meaning of “multi-zone”

Multi-Zone Units

Installation & Setup

CL error code

Filter Cleaning & CL Code

Determine the breaker size and wire needed for your system

Diagnose and prevent crossed wiring in multi-zone systems

Understand how the system receives power

Understand if restarting your unit manually is required after the power goes out

Electrical Related Queries

Locate the model or serial number for your system

Turn off the LED display for the indoor unit

General Queries

Check the resistance of a Pioneer temperature sensor

Find out the type of oil used for units

Fix your indoor air handler when the unit is not turning on

Understand how Cased A-Coils interact with furnaces and other heating units

Understand if the system's fan shuts off in Cooling mode

HVAC Related Queries

Maintenance Tips

Activate the Child-Lock Function

Activate Cooling Mode

Activate Dry Mode

Activate Energy Saver (ECO) Mode

Activate Fan-Only Mode

Activate the Fresh Air Feature

Activate Gentle Wind Mode

Activate Heating Mode

Activate the I Feel feature

Activate the Memory Feature

Activate Mute Mode

Activate the Self-Clean Feature

Activate Sleep Mode

Activate the Timer On/Timer Off Function

Activate Turbo Mode

Activate 46°F Freeze Protection

Operate the indoor unit without a remote control

Switch between °F and °C on the RG10 remote

RG10 Remote

Remote Control Guides

Connect CYB, RYB, and UYB systems with the NetHome Plus App

Connect WYS-20 and WYS-22 systems with the NetHome Plus App

NetHome Plus

Connect your WYT-19 Diamante Series with the Pioneer Airlink App

Connect your WYT-22/WYT-24/WYT-25 Series with the Pioneer Airlink App

Integrate the Pioneer Airlink App with Apple's Smart Home Environment

Pioneer Airlink App

Wi-Fi App Guides

E0 error code

E1 or E2 error codes

E3, E7, or E8 error codes

E4 error code

E6 error code

E9 error code (Diamante Series)

E9 error code (Quantum Series)

EF error code

EU error code

F4 error code

F5 error code

F6 error code (Diamante Series)

F6 error code (Quantum Series)

F7 error code

F8 error code

Fd error code

Fy error code

H1 or H2 error code (Multi-Zone Quantum Ultra Series)

P0 error code

P1 error code

P2 error code

P4 error code (Diamante Series)

P4 error code (Quantum Series)

P5 error code

P6 error code

P7 error code

P8 error code

P9 error code

PA error code (Multi-Zone Quantum Ultra Series)

By Error Code

Find out why your ductless mini split froze up at the indoor air handler

Not Heating

Apply Pioneer Flare Leak Guard during installation

Fix leaks that are difficult to trace

Understand why your wall-mounted indoor unit is leaking water improperly

Water Leaks

By Symptom

E9/P0 error codes

Indoor unit displaying 0A code

Troubleshooting (WYT-19 & WYT-22)

E1/EL 01/EL01 error codes

E3/EH 03/F5/EC 07 error codes

EC/EL 0C error codes

F4/EC51 error codes

LCAC error codes

P0/PC00 error codes

P1/PC01 error codes

P2/PC02 error codes

PC 03/PC03 error codes

P4/PC 04/PC04 error codes

Troubleshooting (WYS, CYB, RYB, UYB, & FYB)

Troubleshooting (Discontinued Products)

Troubleshooting

IDU Disassembly for Diamante Essenza & Pro / Quantum Ultra - High Wall Mount

IDU Disassembly for Quantum Fresh

IDU Disassembly for Quantum Hyperformance

IDU Disassembly for Quantum Ultra - Ceiling Cassette

IDU Disassembly for Quantum Ultra - Ducted Ceiling Concealed

IDU Disassembly for Quantum Ultra - Floor-Ceiling Flex

Indoor Unit Disassembly Guides

ODU Disassembly for Diamante Essenza & Pro / Quantum Ultra / Quantum Hyperformance

△T (RT-ST)	△T > 2°F	-2°F ≤ △T ≤ 2°F	△T < 2°F
→MODE	Cooling	Fan-Only	Heating

Activate Auto ModeUpdated 2 hours ago

Introduction

Steps