Installation Instructions

2.4 Error diagnosis and time
calibration
Error diagnosis aims to help analyse the system
problems. It needs to be done via Bluetooth beside the
lock.
If there is a gateway, the clock will be calibrated
firstly through the gateway. If there is no gateway, it
needs to be calibrated by the mobile phone Bluetooth.
TT lock function
（ Ⅲ ） Main functions-lock management