Which product did you buy? What model is it? These are all very important. If the warranty period has not expired, you can directly find the manufacturer's after-sales engineer to repair it. If you forget the contact information, you can ask the property management company to assist in handling this matter.

The unlock key of the visual intercom system keeps flashing. Can you open the door? If not, please check whether the two ends of the unlocking wire are connected correctly, and then use a multimeter to test at the electric lock end. When unlocking, is there an instantaneous current of more than 300 mA passing through the unlocking wire (yes, it means that the host and unlocking wire are normal, and it is estimated that the electric lock is damaged, so please change the electric lock to test; If not, test the multimeter at the unlock end of the host. If so, unlock the line fault and do not explain the host fault). ?

The whole unit can't be unlocked, but it can be unlocked by password or swipe card: it is estimated that it is caused by short circuit of trunk line or damage of a platform. If the wiring is normal, detect the floor platform in turn from the first floor platform (detecting the floor platform: disconnect the upper trunk line first and detect the current floor. If it is normal, please change the floor platform and try again until it is normal (debugging as new equipment). If not. You call 4-00-608-7-44-7.