Deleting individual users is where the Gateman V20 manual differs from cheaper locks. You cannot delete specific fingerprints easily; most resets require deleting all fingerprints or overwriting slots.
The Gateman V20 is typically a digital door lock featuring a touchscreen panel, fingerprint recognition, and RFID card access. It is designed for both main entry gates and apartment doors, offering a sleek, modern alternative to traditional keys.
Key features usually include:
Most users ignore the interior DIP switches, but the manual details their power. To access them, remove the interior body cover.
| Switch # | Function (Up = On) | Use Case | | :--- | :--- | :--- | | 1 | Enable Random Number (Security) | Prevents smudge attacks by forcing you to press random numbers before your PIN. | | 2 | Dual Authentication Mode | Requires BOTH a fingerprint AND a PIN to open. | | 3 | Silent Mode | Disables all beeping (key for light sleepers). | | 4 | Vacation Mode | Disables all user codes except Master PIN. | gateman+v20+manual
How to change: Flip the switches with the door OPEN to avoid locking yourself out. You do not need to remove batteries; changes take effect immediately.
Unlike a traditional lock, programming a Gateman V20 requires a specific sequence of button presses. Guessing the menu system can lock you out of the admin functions. The manual provides: Wait for beep confirmation
The V20 usually takes 4-8 AA batteries. The manual specifies:
| Step | Action |
|------|--------|
| 1 | Press Master button (inside cover) or enter # MasterPIN # on keypad |
| 2 | Press 1 (Add user) → # |
| 3 | Press 1 for fingerprint → # |
| 4 | Choose user slot (01–20) → # |
| 5 | Place finger on sensor 4 times (lift between scans) |
| 6 | Hear success beep → fingerprint saved | Deleting individual users is where the Gateman V20
Tip: Register the same finger twice for better recognition.
The Gateman V20 manual devotes a significant section to power failures, as a dead battery is the #1 service call.