Power Depletion and Emergency Power Override
When the internal 8 AA alkaline batteries (they are not included) reach critically low voltage, the lock emits an audible warning melody and visual low-battery notification. If operational maintenance is neglected beyond the recommended 1-week warning window, the lock will experience complete power exhaustion, rendering the optical fingerprint scanner, 13.56 MHz RFID reader, and numeric touch screen keypad non-responsive.
To restore access during total battery failure:
- External 9V Power Interface: Locate the two external emergency power contact terminals situated on the underside of the exterior lock body. Firmly press a standard 9V battery (they are not included) against these terminals. While maintaining contact with the 9V battery (they are not included), wake the touch screen and authenticate via valid PIN code (4 to 12 digits), registered RFID card, or optical fingerprint.
- Mechanical Override: Use the supplied emergency mechanical override keys in the hidden manual key cylinder located on the exterior assembly to physically retract the AML320 mortise latch.
- Battery Replacement Procedure: Immediately remove the interior battery cover and replace all 8 AA alkaline batteries (they are not included) simultaneously. Do not combine old and new cells, or mix battery chemistries, as this causes voltage irregularities and accelerated drainage.
IR Motion Sensor and Auto Wake-Up Failures
The SHS-P718 integrates an infrared (IR) motion detection sensor engineered to automatically wake the touch screen keypad when a user approaches within approximately 70 cm. If the interface does not wake up upon approach, verify the following conditions:
- Sensor Obstruction: Inspect the exterior sensor lens for surface dirt, dust accumulation, or foreign debris. Clean the lens area using only a dry, soft cloth. Never apply volatile chemicals, benzene, or alcohol, as these substances damage optical sensor coatings and plastic housings.
- Feature Status: The IR welcome sensor mode may be deactivated in internal system settings. If disabled, manually touch the keypad face with the palm of your hand to awaken the interface.
- Ambient Lighting Interference: Direct, intense sunlight or reflective surfaces facing the exterior escutcheon can interfere with passive IR sensing thresholds.
Biometric and RFID Authentication Issues
If authorized credentials fail to unlock the AML320 mortise mechanism, refer to the diagnostic steps below:
| Symptom | Probable Root Cause | Corrective Action |
|---|---|---|
| Fingerprint scan rejected repeatedly | Contamination on optical glass prism or severe finger dryness/moisture. | Wipe the optical sensor prism with a clean, dry cloth. Ensure the finger is clean and correctly aligned with the original registered position (capacity supports up to 100 fingerprints). |
| RFID card/tag not recognized | Non-compliant frequency or unassigned credential (system supports up to 30 PIN/card users). | Verify the credential adheres strictly to ISO/IEC 14443 Type A (13.56 MHz). Re-register the contactless card via the interior registration button. |
| Double Authentication Mode lockout | Lock is programmed to require both PIN code and fingerprint sequentially. | Input the registered 4-to-12 digit PIN code first, followed immediately by fingerprint authentication on the optical scanner. |
Intrusion and Away Mode Alarm Triggering
The lock features an integrated security alarm that triggers high-decibel audio sirens and emergency flashing lights under specific operational events:
- Away Mode Security Trigger: If Away Security mode is armed from the exterior keypad, operating the interior push-pull handle will immediately trip the intrusion alarm. To silence the alarm, enter a valid 4-to-12 digit PIN code, scan an authorized fingerprint, or present a registered ISO 14443A RFID card at the exterior escutcheon.
- Mortise Jamming / Alignment Errors: An alarm sounds if the deadbolt or latch bolt fails to extend fully into the frame strike. Ensure the gap between the door leaf edge and frame strike plate does not exceed the mandatory 5 mm tolerance, and verify that the door frame cutout provides adequate clearance for the AML320 mortise bolt throw across 40 mm to 80 mm door profiles.
