The building intercom system is a device used in high-rise residential buildings, inside and outside apartment buildings, household information transmission, anti-theft door control, and households alarming to the building duty room in an emergency. The system is mainly composed of host, extension, UPS power, electronically controlled locks and door closers. According to the type, it can be divided into direct-press type, digital type, digital type door-to-door type, direct-view type video intercom, digital video intercom, digital type household-view video intercom and so on.
The host computer is the core part of the building intercom system. The transmission signal and the electric lock control signal of each extension are controlled by the host computer. Its circuit board adopts vibration-reducing installation, and the moisture-proof treatment is extremely strong against vibration and moisture. And with night lighting placement, beautiful appearance, generous. Then in daily life, when the building intercom host encounters a fault, what should we do? Below, let us discuss and analyze several major faults.
Symptom 1: The host cannot unlock the password
1, check the input password is correct;
2, the operation is not correct: Please read the instructions carefully, look at setting password method is wrong, or set the password is not successful;
3. The unlocking line of some building intercom systems is connected to the system power supply. If the host shows “OPENâ€: it means the host is normal, please check whether the connection of the electric lock is correct and whether the power of the electric lock is short-circuited or other lines. Short circuit
4. If the voltage between the wires connecting the electric lock has been lowered, but the electric lock is not open, you need to replace the electric lock (electric lock is also a key component in the building intercom system. Please choose a quality product to ensure the stability of the system and use a more comfortable );
5, check the door machine: When unlocking, the door of the host terminal part of the wiring will have a falling pulse, the normal voltage is 12V (part of the second generation of the system's main product detection door host 7 feet or 8 feet);
6, everything is normal, please consider the quality of the host, try a unit of the same model, the function of the unit;
Subtotal: The general building video intercom system, the emergence of password unlocking is not normal, mainly due to the first two, but the second-generation building intercom system, the third, fourth, fifth of the situation also have consider.
Symptom 2: The indoor extension cannot be unlocked when the host can be unlocked normally.
1. All extensions cannot be unlocked: Check the main line of the unit system to see whether the line is connected incorrectly, short-circuited, or interrupted. Then, check whether the host computer has signal output. Finally, check the floor platform to see if the floor platform is burned or damaged. The floor platform of most building intercom systems is connected in series;
2. Some indoor extensions cannot be unlocked: Check the extension line of the extension to see if there is a connection error, a short circuit, or a breakage in the line, and then detect whether the floor platform has a signal output;
3. If the line and floor platform are normal, consider the extension damage, find a replacement extension with the same model, function, special tips: the indoor extension comes with decoding function, please replace the extension to pay attention to re-encode, when coding The actual floor number is better;
4. Method Tips: When detecting unit host, floor platform and line faults, first use universal meter to check whether there are any signals, minimize the problem, and use one-by-one detection method to replace the same type and function of product testing.
5. Method Tips: Some product signals are normal, but due to problems in the program of the SCM chip used, the output signals are all garbled. When the products on the floor platforms, extensions, and mainframes that use SCM chips are abnormal, It is better to replace the product with the same function and model.
Symptom 3: The host cannot unlock the host if the host can unlock it normally.
1. Line connection error: Check whether the signal line in the network cable is connected properly. Check whether the connection of the network converter is normal. The networking bus of some manufacturers is directly connected to the unit host and requires special inspection.
2. If a networked converter (or a networked switcher, such as a router in a computer network system) is used, if the monitoring function is normal and both the management machine and the user in the unit are in normal use, the switching of the networked converter is mainly considered. , Please replace the same model, function of product testing;
3. Line problem: Please check all the lines in the unit system from the previous building intercom equipment to see if there are breaks, loose joints, short circuits, flooding, etc.
Symptom 4: The host is unable to call the management machine
1, host failure: In the call management machine, using a universal meter to detect the host's output port to see if there is a signal output; please replace the same model, function host test;
2. Network converter (switcher) failure: Check the connection of the online converter to see if there is any error. When using the call manager, use a universal meter to check if there is a signal output from the management port. Use a universal meter to check the connection of the converter. Whether there is signal input on the host input port; in the end, please replace the same model, functional networking converter test.
Symptom 5: The host is busy after power on
1. Line short-circuit: Please do not re-test the main line. Consider the short circuit of the main line of the system. Please check whether there is a short circuit in the main line.
2. The floor platform of a certain floor is faulty and leads to the system short-circuit: The floor platform test is broken layer by layer, and the floor platform in use is replaced with the spare floor platform in turn until the cause is detected.
Building intercom system other issues
1, shockproof wiring problem
Most building intercoms use terminal posts or screw presses. Earthquake protection is also a key issue. In practice, many intercom mainframes are found on movable doors. Frequent vibrations occur with the opening and closing of doors. Such problems usually occur. The poor contact occurred due to vibration; the second reason is that the line is not protected by the sheath in the active joint of the door frame and the door leaf. When the door leaf is opened and closed, the circuit is pinched or severely worn, resulting in the system breaking or short circuit; When the host is installed, the shockproof and wiring must be handled well. It is recommended that the intercom host be installed on a very open door or embedded in a wall;
2, unlock the problem
The unlocking line of most building intercoms (to the electric control lock line) is electrically controlled and locked from the intercom mainframe. This type of wiring has many advantages, such as a strong and reliable protection against damage and a stable unlock signal; but there are also some buildings. The intercommunicating unlocking line is another kind of connection, that is to connect the three-core cable from the intercom host to the system power supply, and then connect the two-core cable from the power supply to the electronic control lock, and the general building intercom power supply is impossible. Installed on the door (mostly concealed in the wall near the door, etc.), this kind of unlocking problem may appear in three aspects: Intercom mainframe, power supply, unlocking circuit, based on experience, the fault is mainly concentrated in the power and unlocking Above the line, in case of such wiring, please first check this unlocking line, secondly consider replacing the power supply test, and finally consider the intercom host.
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