1. Introduction
This user manual provides detailed instructions for the installation, operation, and maintenance of your ARPHA Fingerprint Door Knob D228. Please read this manual thoroughly before installation and use to ensure proper function and safety. Keep this manual for future reference.
2. Product Overview
2.1 Key Features
- 5-in-1 Unlocking Methods: Fingerprint, Bluetooth App Control, Digital Password, One-Time Code, and Mechanical Key.
- App Control: Manage access, view entry logs, set temporary codes, and receive low battery alerts via the Tuya APP (Bluetooth connectivity).
- Anti-Peeping Password: Enter random digits before or after your actual password to prevent unauthorized observation.
- Easy Installation: Designed for quick setup with a screwdriver, fitting standard door dimensions.
- Emergency Power: Powered by 4 AA batteries (not included) with a Type-C emergency power port for backup.
- Durable Construction: Made from zinc material for reliability.
- Weather Resistant: IP54 rated for protection against dust and splashing water.
2.2 Product Diagram
Image: Front view of the ARPHA Fingerprint Door Knob D228, showing the fingerprint sensor and numeric keypad.
Image: An overview of the ARPHA D228 smart door knob installed on a door, highlighting its keyless entry and app control features.
3. Setup
3.1 Installation Requirements
- Door Thickness: 1-3/8 inches to 2-1/8 inches (35 mm - 55 mm).
- Backset Scale Range: 2-3/8 inches (60mm) and 2-1/8 inches (70mm).
- Tools Required: Phillips head screwdriver.
3.2 Installation Steps
- Prepare the door: Ensure your door meets the specified thickness and backset requirements.
- Install the latch: Insert the latch into the door edge and secure it with screws.
- Install the exterior assembly: Place the exterior handle assembly through the door, ensuring the spindle aligns with the latch mechanism.
- Install the interior assembly: Connect the interior handle assembly to the exterior assembly, ensuring all cables are properly routed and connected. Secure with screws.
- Insert batteries: Open the battery cover on the interior assembly and insert 4 AA batteries (not included), observing polarity.
- Test the lock: After installation, test the mechanical key and ensure the handle operates smoothly.
Image: The ARPHA D228 door knob demonstrating its ability to automatically identify left or right door handing during installation.
3.3 App Setup (Tuya APP)
- Download the Tuya APP: Search for "Tuya Smart" in your mobile device's app store and download it.
- Create an account: Follow the in-app instructions to register a new account or log in if you already have one.
- Add device: Ensure Bluetooth is enabled on your phone. In the Tuya APP, tap "Add Device" or the "+" icon. The app should automatically detect the ARPHA D228 door knob.
- Pair the device: Follow the on-screen prompts to pair your door knob with the app. This may involve pressing a button on the lock or entering a default code.
- Configure settings: Once paired, you can configure user fingerprints, passwords, temporary codes, and other settings within the app.
4. Operating Instructions
4.1 Unlocking Methods
Image: Visual representation of the five unlocking methods: Fingerprint, App Control, Keypad, and Mechanical Key.
- Fingerprint Unlock:
Place your registered finger on the fingerprint sensor. The lock will unlock if the fingerprint is recognized. The sensor has a 0.3s identification speed and 99.8% accuracy rate.
Image: A finger being placed on the fingerprint sensor of the ARPHA D228 door knob for unlocking.
Image: Detailed view of the fingerprint sensor technology, highlighting its speed and accuracy. - Digital Password Unlock:
Enter your registered password on the keypad. The lock supports an anti-peeping function where you can enter random digits before or after your actual password (e.g., XX + Password + XX).
Image: Illustration of the anti-peeping password feature, showing how random digits can be added around the real password. - App Control Unlock:
Open the Tuya APP on your smartphone and use the one-touch unlock feature. Ensure your phone is within Bluetooth range of the lock.
Image: A smartphone displaying the Tuya app interface with an unlock button for the ARPHA D228 door knob. - One-Time/Temporary Code:
Generate temporary or date-specific access codes through the Tuya APP for guests or service personnel. These codes can be sent remotely.
Image: A person receiving a temporary access code for the ARPHA D228 door knob via their smartphone.
Image: A scenario showing a delivery person and a homeowner communicating about a one-time access code for entry. - Mechanical Key:
Use the provided physical backup keys to unlock the door in case of battery failure or other emergencies. The keyhole is located at the bottom of the exterior handle.
4.2 App Functions
- Access Entry Logs: View a history of who entered and when.
- Automatic Locking: Configure the lock to automatically lock after a set period.
- Low Battery Alerts: Receive notifications when the battery level is low.
- User Management: Add or delete up to 50 different user codes and fingerprints.
Image: An illustration showing various user types (family, roommate, agent, repairman, friend, delivery man) who can be assigned unique access codes.
4.3 Waking Up the Touchscreen
Users can place their finger on the lock to wake up the touchscreen, which takes approximately 1 second.
Image: A hand touching the ARPHA D228 door knob's keypad to activate the screen.
5. Maintenance
5.1 Battery Replacement
The ARPHA D228 door knob is powered by 4 AA batteries (not included), providing approximately 3-4 months of continuous operation. The lock will emit a low battery sound prompt when power is running low. Replace all four batteries promptly when this alert occurs.
Image: A visual showing the ARPHA D228 door knob indicating a low battery alert and the use of the Type-C emergency charging port.
Image: A visual representation of the low battery alert on the ARPHA D228 door knob, with a smartphone displaying a 20% battery level.
5.2 Emergency Power
In case of complete battery depletion, the lock features a Type-C emergency power port. Connect a portable power bank or a Type-C charger to this port to temporarily power the lock and gain access.
Image: A hand connecting a Type-C cable to the emergency power port on the ARPHA D228 door knob.
5.3 Cleaning
Clean the lock's exterior with a soft, dry cloth. Avoid using abrasive cleaners, solvents, or harsh chemicals, as these can damage the finish and electronic components.
5.4 Weather Resistance
The ARPHA D228 is designed with IP54 weather resistance, meaning it is protected against dust ingress and splashing water from any direction. It can operate in temperatures ranging from -4°F to +140°F.
Image: An illustration highlighting the weather resistance of the ARPHA D228 door knob, showing its ability to withstand various temperatures and water splashes (IP54 rating).
6. Troubleshooting
- Fingerprint not recognized: Ensure your finger is clean and dry. Try re-registering your fingerprint if the issue persists. Ensure proper placement on the sensor.
- Lock not responding: Check battery levels. If batteries are low or depleted, use the Type-C emergency power port or the mechanical key.
- Auto-lock behavior: The auto-lock feature is either on or off. If turned off, the lock will not engage automatically or manually via keypad/fingerprint. If you require the door to remain unlocked for a period, you must keep it physically open or unlock it each time.
- Cannot manually lock from inside: This model does not feature a manual lock button on the interior. Twisting the interior handle will always open the door, regardless of its locked status. To secure the door from the inside, ensure the auto-lock feature is enabled or use the app to lock it.
- Lock relocks too quickly: The lock is designed to relock instantly (1-2 seconds) after unlocking. There is no option to extend this time. If you need to make multiple trips, you must either keep the door physically open or unlock it each time.
- Keypad unresponsive: Ensure the touchscreen is awake by placing a finger on it. If still unresponsive, check battery levels.
7. Specifications
| Feature | Specification |
|---|---|
| Brand | ARPHA |
| Model Name | D228 |
| Lock Type | Biometric, Deadbolt |
| Unlocking Methods | Fingerprint, Bluetooth App, Digital Password, One-Time Code, Mechanical Key |
| Special Features | Anti-Peeping Password, Auto-Lock, Fingerprint, One-Touch Lock, Touchscreen |
| Connectivity Protocol | Bluetooth |
| Material | Zinc |
| Item Dimensions (L x W x H) | 5 x 2.5 x 2.5 inches |
| Item Weight | 2.03 pounds |
| Power Source | 4 AA Batteries (not included) |
| Emergency Power | Type-C Port |
| Door Thickness Range | 1-3/8 inches to 2-1/8 inches (35 mm - 55 mm) |
| Backset Range | 2-3/8 inches (60mm) and 2-1/8 inches (70mm) |
| Weather Resistance | IP54 |
8. Warranty and Support
The ARPHA Fingerprint Door Knob D228 is backed by an 18-month warranty. ARPHA also provides lifetime technical support. Our customer service team is available 24/7 to assist you with any questions or issues you may encounter.
For support, please refer to the contact information provided with your product packaging or visit the official ARPHA website.
