1. Introduction
This manual provides detailed instructions for the installation, operation, and maintenance of your GATEMAN WF20 Fingerprint Digital Door Lock. Please read this manual thoroughly before installation and use to ensure proper function and security. Keep this manual for future reference.
Safety Precautions
- Do not attempt to disassemble or repair the lock yourself. Contact qualified service personnel.
- Avoid exposing the lock to direct water spray or excessive humidity.
- Use only specified AA alkaline batteries. Do not mix old and new batteries or different types of batteries.
- Ensure the door is properly aligned and closes smoothly before installing the lock.
2. Product Overview
The GATEMAN WF20 is a keyless digital door lock featuring fingerprint recognition and a touch keypad for secure entry. It is designed for modern homes and offices, offering convenience and enhanced security.
Components
Familiarize yourself with the main components of your GATEMAN WF20 lock:

Figure 2.1: Front Panel of the GATEMAN WF20 Lock. This image displays the sleek black front panel of the GATEMAN WF20 digital door lock, featuring a numeric touch keypad and a fingerprint scanner located at the top. The brand name 'GATEMAN' is visible above the scanner.

Figure 2.2: Interior Panel of the GATEMAN WF20 Lock. This image shows the interior side of the GATEMAN WF20 lock, highlighting the manual thumb turn for locking/unlocking from inside, an 'OPEN/CLOSE' button, and the battery cover. The 'Smart Living' logo is also visible.
- Fingerprint Scanner: Located on the top front panel for biometric authentication.
- Touch Keypad: Numeric pad on the front panel for PIN code entry.
- Manual Thumb Turn: On the interior panel for manual locking and unlocking.
- OPEN/CLOSE Button: On the interior panel for quick locking/unlocking.
- Battery Cover: On the interior panel, protecting the battery compartment.
- Reset Button: Small button on the bottom front for system reset.
3. Setup and Installation
Proper installation is crucial for the optimal performance of your GATEMAN WF20 lock. It is recommended to have the lock installed by a qualified professional.
3.1 Battery Installation
- Remove the battery cover from the interior unit.
- Insert four (4) new AA alkaline batteries, ensuring correct polarity (+/-).
- Replace the battery cover. The lock will emit a sound indicating it is powered on.
3.2 Initial Setup and Master PIN Registration
Upon first power-up or after a factory reset, you must register a Master PIN code.
- Open the battery cover on the interior unit.
- Press the [Registration] button (usually located near the battery compartment).
- On the front keypad, enter your desired 4-12 digit Master PIN code.
- Press the [*] button to confirm.
- Re-enter the Master PIN code.
- Press the [*] button to confirm. A confirmation sound will indicate successful registration.
Note: The Master PIN code is essential for managing other user PINs and fingerprints. Keep it confidential.
4. Operating Instructions
4.1 Unlocking with Fingerprint

Figure 4.1: Fingerprint Scanning. This image illustrates a user placing their finger on the fingerprint scanner of the GATEMAN WF20 lock for biometric authentication. A red line indicates the scanning area.
- Place your registered finger flat on the fingerprint scanner.
- Hold your finger steady until the lock emits a confirmation sound and unlocks.
4.2 Unlocking with PIN Code
- Touch the keypad to activate it.
- Enter your registered 4-12 digit PIN code.
- Press the [*] button. The lock will emit a confirmation sound and unlock.
4.3 Locking the Door
- Automatic Locking: The lock is set to automatically lock after a few seconds when the door is closed.
- Manual Locking (from outside): Touch the keypad or press the '#' button.
- Manual Locking (from inside): Press the 'OPEN/CLOSE' button or turn the manual thumb turn.
4.4 Registering User Fingerprints
- Open the battery cover and press the [Registration] button.
- Enter the Master PIN code followed by the [*] button.
- Follow the voice prompts or indicator lights to register the fingerprint. Typically, you will be asked to scan the finger multiple times.
- Press the [Registration] button again to exit registration mode.
4.5 Registering User PIN Codes
- Open the battery cover and press the [Registration] button.
- Enter the Master PIN code followed by the [*] button.
- Enter the desired 4-12 digit user PIN code.
- Press the [*] button to confirm.
- Re-enter the user PIN code.
- Press the [*] button to confirm. A confirmation sound will indicate successful registration.
- Press the [Registration] button again to exit registration mode.
5. Maintenance
5.1 Battery Replacement
The lock will provide a low battery warning (audible alarm or indicator light) when batteries are running low. Replace all four AA batteries promptly.
- Remove the battery cover on the interior unit.
- Remove all old batteries.
- Insert four (4) new AA alkaline batteries, observing correct polarity.
- Replace the battery cover.
Note: Your registered PIN codes and fingerprints will be retained during battery replacement.
5.2 Cleaning
- Wipe the lock's surface with a soft, dry cloth.
- Do not use abrasive cleaners, solvents, or chemical sprays, as these can damage the finish and electronic components.
- Keep the fingerprint scanner and keypad clean and free of dust or debris for optimal performance.
6. Troubleshooting
| Problem | Possible Cause | Solution |
|---|---|---|
| Lock does not respond. | Dead batteries. | Replace all four AA batteries. |
| Fingerprint not recognized. | Finger not placed correctly; scanner dirty; unregistered fingerprint. | Ensure finger is clean and placed flat. Clean scanner. Register fingerprint if not already done. |
| PIN code not working. | Incorrect PIN entered; keypad not activated. | Ensure keypad is active before entering PIN. Verify PIN code. |
| Lock beeps continuously. | Low battery warning; door not fully closed. | Replace batteries. Check door alignment and ensure it closes completely. |
| Lock is difficult to operate. | Mechanical obstruction; improper installation. | Check for any obstructions around the door or lock. Re-evaluate installation or contact support. |
7. Specifications
- Model: WF-20
- Brand: GATEMAN
- Lock Type: Biometric, Digital
- Power Source: Battery powered (4 AA batteries required)
- Material: Other (durable composite/metal)
- Style: Modern
- Colour: Black
- Control Method: Touch, Hand Control
- Special Features: Keyless entry
- Item Weight: 907 g
- Parcel Dimensions: 30.48 x 20.32 x 5.08 cm
8. Warranty and Support
For warranty information, technical support, or service inquiries, please refer to the warranty card included with your product or visit the official GATEMAN website. Keep your purchase receipt as proof of purchase.
For further assistance, you may contact the retailer where the product was purchased.




