LED colors and sounds
The lock button on your TMD Chain Lock uses different colors and sounds to provide feedback on what is happening. In this article you can see an overview of all of these.
Event | LED behavior | Sound |
|---|---|---|
Lock is opening | Green light | One beep |
Alarm is arming | Two white flashes | Two beeps |
Alarm is deactivated | Red flashes, repeating in sets of three | One beep |
Connection with lock established | Blue light for 5 seconds | No sound |
Connection with lock lost | Two blue flashes | No sound |
Battery is low (<20%) | Three orange flashes | Three beeps |
Lock is charging | White flashes | No sound |
Something is wrong (contact support) | Red flashes | No sound |
Firmware is updating | White flashes | No sound |
Emergency code entered incorrectly | Three red flashes | Three beeps |
Updated on: 21/11/2025
Thank you!