Daikin One Thermostat Service Manual

The Daikin One Thermostat is a smart, connected thermostat designed for integration with Daikin HVAC systems. It features Wi-Fi connectivity, a color touchscreen interface, remote control via smartphone app, geofencing, scheduling, indoor air quality monitoring, and compatibility with various Daikin equipment. Below are key sections for safety, features, installation, configuration, operation, and troubleshooting.

Features at a Glance

Key components: Color touchscreen display, Wi-Fi module, internal sensors (temperature, humidity), terminal block for HVAC wiring, wall plate, and power adapter.

Installation & Wiring

Turn off power to HVAC system before installation. Mount on interior wall away from direct sunlight, drafts, and heat sources.

1. Remove old thermostat: Label existing wires according to terminal designations (R, C, Y, G, W, O/B, etc.).
2. Mount wall plate: Level and secure using provided screws.
3. Connect wiring: Insert labeled wires into corresponding terminals on Daikin One base. Ensure C (common) wire is connected for continuous power.
4. Attach thermostat: Align and snap onto wall plate until it clicks into place.
5. Restore power: Turn HVAC system power back on.

WARNING! Electrical shock hazard. Ensure power is OFF at breaker before handling wires. Incorrect wiring can damage equipment.

Initial Setup & Configuration

Upon first power-up, follow on-screen setup wizard.

1. Select language: Choose preferred language for interface.
2. Set date and time: Manual entry or automatic via Wi-Fi.
3. Configure HVAC equipment: Select system type (Heat Pump, Gas/Electric, etc.) and stages via guided setup.
4. Connect to Wi-Fi: Enter network credentials to enable remote features.
5. Pair with Daikin One App: Scan QR code or enter pairing code to link thermostat to your account.
6. Calibrate sensors: Allow 24 hours for temperature and humidity calibration.

CAUTION! Accurate equipment configuration is critical for proper operation and efficiency.

Technical Specifications

• Display: 3.5" full-color capacitive touchscreen.
• Power Requirements: 24VAC, 20VA (from HVAC system or adapter).
• Wi-Fi: 2.4 GHz 802.11 b/g/n.
• Sensors: Temperature (±0.5°F accuracy), Relative Humidity (±3%), Indoor Air Quality (PM2.5, VOC, CO2).
• Compatibility: Single-stage, multi-stage, and heat pump systems. Requires C-wire for full functionality.
• Operating Temperature: 32°F to 122°F (0°C to 50°C).
• Humidity Range: 0% to 90% RH (non-condensing).
• Dimensions: 4.3" x 3.3" x 0.9" (109mm x 84mm x 23mm).
• Certifications: FCC, UL, ETL.

Controls & Interface

Touchscreen Interface: Home screen shows current temp, set point, mode, and IAQ. Swipe for schedules, history, and settings.

Physical Buttons: None; all controls via touchscreen.

Settings Menu: System Mode (Heat, Cool, Auto, Off), Fan (Auto, On), Schedule, Preferences, Wi-Fi, Alerts, Diagnostics.

Advanced Settings: Deadband, compressor protection time, staging configuration, sensor calibration, dealer settings (access code required).

Connecting to Wi-Fi & App

Wi-Fi Setup: Navigate to Settings > Wi-Fi. Select network, enter password. LED indicator solid blue when connected.

1. Download Daikin One App from Apple App Store or Google Play Store.
2. Create an account or log in.
3. Tap "Add Device" and follow in-app instructions (scan QR code on thermostat or enter pairing code from Settings > About).
4. Assign thermostat to a location (Home, Office, etc.).

Tip: Ensure thermostat is within range of your 2.4 GHz Wi-Fi router. 5 GHz networks are not supported.

Operating Modes & Scheduling

Supports Heat, Cool, Auto (automatic changeover), and Off modes.

1. Manual Control: Tap temperature on home screen to adjust set point.
2. Schedule: Create a 7-day schedule with up to 4 periods per day (Wake, Leave, Return, Sleep).
3. Hold: Temporarily override schedule. Choose "Until Next" or "Permanent".
4. Vacation Mode: Set extended away periods with energy-saving temperatures.
5. Adaptive Recovery: Learns how long system takes to reach temperature and starts early to meet schedule.
6. Fan Control: Set to Auto (runs with HVAC) or On (continuous circulation).

WARNING! In Auto mode, ensure a sufficient deadband (e.g., 3°F) between heating and cooling set points to prevent short cycling.

Advanced Features

Geofencing: Automatically sets to Away mode when all users leave home zone, resumes schedule upon return. Configure in App > Settings.

Indoor Air Quality (IAQ) Dashboard: View PM2.5, VOC, and CO2 levels. Can trigger ventilation or air cleaner if connected to compatible equipment.

Dealer Settings: For professional installers (access code required). Configure equipment staging, airflow, refrigerant charge assist, and system tests.

Software Updates: Delivered over-the-air via Wi-Fi. Ensure thermostat remains connected and powered.

Maintenance & Care

Unplug or turn off HVAC power before cleaning. Use a soft, dry microfiber cloth to gently wipe screen. Do not use liquids, cleaners, or compressed air.

CAUTION! Do not spray any liquids directly on thermostat. Avoid abrasive materials that may scratch the screen.

Regulatory & Compliance

FCC Part 15: This device complies with part 15 of the FCC Rules. Operation is subject to the condition that this device does not cause harmful interference. Copyright © Daikin North America LLC. Daikin One is a trademark of Daikin Industries, Ltd. For technical support, visit www.daikinone.com or contact 1-855-838-3322.

Troubleshooting

Reset: Settings > System > Reset to Factory Defaults (requires reconfiguration).

Service: 1-855-838-3322; www.daikinone.com