T225 Support
Get installation, setup and everyday-use help for your T225 fingerprint handle lock.
Manual & installation · App setup · Battery & backup access · Get help
Manual & installation
Open the official T225 user manual
Check that the model and hardware match your lock. For a different version, contact LNDU Support with a model-label photo and order number.
- Check your door thickness, backset and handle direction before installation. Use the parts supplied for your T225 rather than mixing hardware from another lock.
- Complete the mechanical installation before inserting batteries. Follow the instructions supplied with your lock.
- Keep the door open while testing the inside handle, key, keypad and enrolled fingerprints. Keep the physical key accessible outside the locked property.
App setup & everyday access
Use the app name and QR code supplied with your particular T225. Do not use another model's pairing or reset sequence. If your app or setup screen does not match the instructions, contact us with a screenshot before proceeding.
Register your administrator access during initial setup, then follow the T225 instructions to add passcodes, fingerprints or fobs. Keep administrator credentials private.
Remote app operation needs a working network connection. When asking for connection help, include your app name, phone type and the exact error message.
Battery & backup access
- T225 uses AA batteries; the full battery compartment holds 8. Follow the polarity markings and use a matching set.
- Replace depleted batteries promptly. Do not treat the emergency power port as a battery charger.
- Keep the mechanical key available as a backup. Test it before relying on the lock for everyday use.
Common checks
The handle or latch is not moving smoothly
Check whether the issue occurs with the door open or only when it is closed. Review handle direction and the latch/strike alignment using your installation instructions. Do not force the mechanism.
The lock does not respond
Check battery orientation and power first. If the issue began immediately after installation, contact support with photos of the installation and describe any lights or voice prompts.
I need to reset or change access settings
Use the instructions for your exact version. After a reset, complete administrator setup before putting the lock back into use. Contact support if you need to preserve existing access settings.
Still need help?
Send T225, your order number, the issue, and relevant photos or a short video. Hide passcodes and other private information.