8 strokes help you extend the lifespan of building intercom
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Second, the door closer should not be opened for a long time. The longer the opening time is, the more likely it is that the door closer will leak, eventually making it unable to work properly.
Third, carry your own key or access control card, do not easily lend to other people, do not let people do not acquaintance, small ads and small business hawkers entered together. 
Fourth, do not open the door to the door for a long time to the maximum, not to use bricks, sticks and other hard objects in the lower corner of the door hinges and the lower lintel, so easy to cause damage to the door closers, especially when the wind, easy Causes damage to the door leaf.
5. Once the door leaf cannot be opened, don't squash it and kick it. Be sure to wait until the whole system is restored to its original state before reopening it (about 1 minute).
6. When using the key to open the door, do not hold the doorknob tightly and turn the key by hand. Because the electronic system will send electrical signals to the mechanical part during the door opening process. Since the force of the mechanical part to open the lock tongue is very small, if it is tightened, The handle cannot be opened, so that the tongue cannot be retracted and the door leaf cannot be opened.
Seven, in the home improvement, try not to move the indoor intercom system extension, if you need to move, please professionals.
8. When the electronic lock cylinder is used for three to four months, it is best to carry out a care and maintenance in order to be flexible.