Door compatibility
Confirm the door type, lock position, and installation requirements for this model.
T225
T225 Keypad Handle Lock Support
Find setup guidance, manuals, installation resources, and troubleshooting topics for your T225 keypad handle lock.
Before You Start
Before installation, review your product manual, check your door setup, and keep all included parts nearby. If you are unsure about fit or setup, contact LNDU support before installation.
Required tools
Review the manual and prepare the basic tools listed for your lock before mounting.
App / Wi-Fi readiness
Review app setup notes and make sure your phone and network are ready before pairing.
Backup key access
Confirm the backup access method and when users should keep it ready.
User Manual
Download the latest manual and setup resources for this model.
PDF
User Manual PDF
Download the official user manual for setup, installation, and everyday use.
Installation Video
Watch installation and setup videos for this model.
Video
Installation Video
Watch the installation video before mounting or setting up the lock.
Video
Setup Walkthrough
Guided overview for first-time setup and everyday use.
Video
App Pairing Video
Use this video to review app pairing and setup steps for your lock.
Video
Passcode Addition Tutorial
Steps to add new passcodes for your smart lock
Video
Fingerprint Addition Tutorial
Step-by-step guide to register fingerprints for the smart lock.
Video
Other Related Settings Tutorial
Tutorial for additional device configuration options
App / Wi-Fi Setup
Use this section to review app setup, network readiness, pairing steps, and common setup checks for your lock. Available features vary by model.
- App name
- Wi-Fi requirement
- Pairing steps
- Reset before pairing
- Common setup issues
Battery & Backup Access
Review battery care, backup access, and emergency entry options for your lock. Available backup methods vary by model.
- Battery type
- Low battery alert
- Backup key
- Emergency power / backup access
- Battery care
Reset & Troubleshooting
Use these common checks to resolve setup, access, battery, or app issues. For model-specific steps, review your manual or contact LNDU support.
Product FAQs
Start with these common questions, then review the manual or contact LNDU support if you need model-specific help.
Does this lock fit my door?
Check your door thickness, backset, existing lock type, and door condition before installation. Review the product page and manual for model-specific requirements.
Can I still use a physical key?
Many LNDU smart locks include backup access options such as a physical key, depending on the model. Keep backup keys accessible and review your manual before installation.
What happens if Wi-Fi is down?
Depending on the model, local access methods such as keypad, fingerprint, card, or physical key may still be available. Remote app features may require a working connection.
What happens when the battery is low?
Replace or recharge batteries according to your product manual. Keep backup keys accessible and review emergency power options if your model supports them.
Where can I find the manual or installation video?
Use the manual and video resources on this support page. If you are not sure which guide applies to your product, contact LNDU support with your model name.
Contact Support
Need more help? Contact LNDU support with your product model, order information, and a short description of the issue.