1. Scope Check
Ask: “Does the issue affect one user or multiple users?”
One user only → go to Step 2
Multiple users → go to Step 3
2. Single-User Check
Ask the user to inspect their finger(s) for:
Dryness or dampness
Cold skin
Cuts or injuries
Lotion or heavy wear
Retry the fingerprint scan.
Note: Faint or shallow ridges, very dry/wet skin, or worn fingerprints may prevent the sensor from reading one user’s finger while still working for others.
3. Multiple-User Failure — Quick Fixes
Perform these steps one at a time, testing after each:
Check battery level
Replace with a fully charged spare lithium battery.
Perform a factory reset
Note: This erases all user data.
After reset, the master PIN is restored to the default: 12345678
Re-register fingerprints
4. Persistent Issue
If the problem continues after Step 4, replace the OUTSIDE PANEL following the warranty procedure: Warranty Claim & Technical Escalation.