One. What to do if the door of the building is not opening?
1、All intercom systems cannot be unlocked: Check the main communication line for incorrect connections, short circuits, or damaged wiring. Also, verify that the unit host is outputting signals, and then check each floor platform for signs of burnout or damage. This is because many buildings' intercom systems use a series connection for the floor platforms.

2、Some internal telephone extensions cannot be unlocked: Check the extension's wiring for incorrect connections, short circuits, or damaged conductors. Also, verify that the floor platform is transmitting a signal.
3. If the lines and floor platforms are functioning normally, consider the possibility of a faulty intercom. Try replacing it with an identical model and function intercom. Please note: For intercoms with built-in decoding functions, be sure to re-encode the intercom when replacing it. It is recommended to use the actual floor number for encoding.
Two. What should I do if the stainless steel building door cannot be automatically closed?
1、Check if the power belt is installed backward. The solution is to reverse the connection of the upper and lower belt pulleys, or replace the controller.
2. When power is connected to the building door while it is open or closed, there is no response. If power is connected but no power is supplied, this may be due to a malfunctioning controller.
3. The issue with the building door remote lock can be resolved by simply using the remote control to unlock it.