After the installation, the infrared light of lock body external light is bright, after the card reader read the cards, but it is not responsive? Using the battery directly to connect the electricity, why it still can not read the cards? If you remove it, you can read it again. Finding that the reading card line is a bit short-circuit, can it affect to read the cards?

Yes, please pay attention to the line of card reader (the yellow line). Many customers install it, and it often is cut off or nipped the line of reading cards, which leads to unreadable cards. The lock and the line of reading card have to put trimly together when installing, and do not nip the line.