The eSSL GL300 Fingerprint Glass Door Lock (KT reference KTI010040GL300) features integrated diagnostic prompts via its internal speaker and visual screen. When operational faults, verification issues, or power anomalies occur on frameless glass doors (10 mm to 12 mm leaf thickness), follow the standardized diagnostic procedures detailed below.
Addressing Low-Battery Audio Alerts and Lockout States
The GL300 features active voltage monitoring. When operational voltage drops below operating thresholds, the unit issues an acoustic low-battery prompt via the speaker and restricts standard access operations to prevent mechanical entrapment. To resolve this state:
- Emergency Power Interface: Connect a standard 5V DC power bank to the emergency Micro USB external power port located at the base of the lock assembly to temporarily energize the visual screen and keypad.
- Credential Authentication: Enter an enrolled administrative fingerprint, card, or numeric password (6 to 10 digits) to release the lock while emergency USB power is connected.
- Cell Replacement: Remove the interior battery cover and replace all depleted cells with four fresh 1.5V AA alkaline batteries (they are not included). Non-alkaline and rechargeable batteries (they are not included) are not recommended by the manufacturer. Never remove batteries (they are not included) while the lock is actively in a working state.
Diagnostic Matrix: Common Fault Conditions and Resolutions
| Symptom | Probable Root Cause | Corrective Action |
|---|---|---|
| Door remains permanently unlocked after access | Normal Open mode is active | Rotate the internal thumb-turn knob, or press * on the touch keypad to cancel Normal Open mode. Normal Open mode can also be toggled by pressing 2 and 8 after administrator verification. |
| Keypad darkens and fails to accept input mid-entry | Auto-sleep timeout reached | The lock powers off automatically within 10 seconds of inactivity to conserve battery power. Touch the keypad to wake the visual screen and complete entry without pausing past the 10-second threshold. |
| PIN rejected despite entering valid numeric sequence | Random anti-peeping digit limit exceeded | Ensure the total digit string—including random decoy numbers entered before or after the true 6 to 10 digit password—does not exceed the system maximum of 30 total digits. |
| Administrative menu locked or credentials forgotten | Default administrative password altered or lost | Execute a hardware factory reset to restore default credentials. Note that initialization clears all 100 fingerprint, password, and card slots (up to 300 total capacity). |
| Lock body or strike box binding during latching | Glass panel displacement | Verify clamp positioning on the frameless glass panel (rated for 10 mm to 12 mm thickness). Adjust alignment between the lock unit (131 mm × 200 mm × 75 mm) and the strike box without drilling holes. |
Factory Initialization Procedure
If electronic errors persist or access to the administrative menu is lost, perform a complete hardware initialization. Press the reset button located on the back body of the lock, or navigate through the system management menu until the speaker issues the voice prompt 'succeed'. This routine restores the default administrator password to '0123456789' and clears all stored regular user credentials across all groups.
Environmental Operating Range Verification
Ensure the installation site complies with the rated operating temperature limit of -25°C to 55°C. System anomalies such as sensor unresponsiveness can occur if the hardware is exposed to excessive ambient heat, intense radiation, high electromagnetic fields, high salinity, or corrosive chemical environments.
