Today, almost all multi-storey buildings have an intercom. This device facilitates life, allowing you to open the door to the entrance without leaving your apartment. For this, special services install communications and control devices. For certain reasons, this technique may fail.
You can contact the service that provides the corresponding service. In some cases, you can try to fix the problem yourself. In this case, you will need to figure out why the intercom does not work. Knowing the cause, it will be possible to eliminate it.
Device features
In office and multi-apartment buildings, most often intercoms of various types are installed. Today, there are many systems that allow you to control access to the premises. More often, appliances in apartment buildings fail. This is due to the large number of users who operate the system daily.
To understand why the intercom does not work and how to solve the problem, you will need to study its device in detail. The device must have a subscriber device. It can be a tube or even a monitor. At the other end of the connection is the call bar. It has buttons for dialing an apartment.
The signal from the panel is transmitted to the handset. At the same time, he goes to the control unit common for the entrance, the lock button and the switch. The last device determines the code typed on the keyboard. This allows you to send the signal to the right party. If the doorphone user wants to open the door, he sends a response signal to the control unit. In turn, this device unlocks the magnetic lock holding the door.
Varieties
Various factors may explain why the intercom does not work. The causes of the malfunction can be observed at any node in the overall system. To correct the situation, it is necessary to understand the principle of operation of such devices. There are two main types of them.
The first category includes digital models. Demand today is the production of Metacom, Marshal, as well as Proel, Raikman, Laskomex and others. The second group includes coordinate intercoms. In our country, the devices “Visit”, “Eltis”, “Digital” are in demand in this category.
The presented devices differ in the method of signal transmission and the device of the communication line. Digital intercoms have a two-wire line for signal transmission. Determination of the apartment number occurs using jumpers that are located on the handset. Coordinate systems connect the call block to the subscriber’s control device using a special switch. If there is no documentation for the device and it is impossible to determine which category of devices it belongs to, you need to disassemble the handset. The presence of jumpers indicates that the doorphone belongs to a digital group.
Video intercom
There is another type of intercoms. It is used in private homes or offices. This is a video intercom. It allows not only to hear, but also to see the visitor. There are several main reasons why the intercom in this category does not work . This is most often due to incorrect wiring.
The presented system transmits a signal through 4 wires. They are responsible for the audio and video signal. There is also a power cable (transmits voltage 12 V) and a common cable. Each of them is marked with a specific color. If you connect the wire to an inappropriate socket, the signal cannot be processed by the system. In order not to confuse them, you need to carefully study the manufacturer's instructions.
In some cases, the video intercom can work together with access control. In this case, 2 more wires are used for connection. These communications have no polarity. This simplifies their connection.
Typical malfunctions
There are many factors why the intercom does not work. The reasons can be very different. If the design of the device is quite complicated (as it happens in video intercoms), it quickly fails. Any element in the system may break.
Quite often, faults are detected in the area of ​​the signal. The line may be cut off. If the wires are intact, communication between the boards may be interrupted. If the sound is too quiet, the loop of contacts may be gradually moving away. This is due to the vibration that the device experiences when opening and closing the doors.
If only a specific function does not work, it will be more difficult to determine the cause. The reasons for the breakdown can be many. The repair approach will be appropriate for the malfunction.
Who to contact?
Many users of the equipment presented are interested in if the intercom does not work, where to go. You can report a breakdown to an organization that provides communication services. However, there are other companies that specialize in repairing intercoms. Their rates are approximately the same.
If the owner of the equipment has no time to deal with the cause and elimination of the breakdown, he can contact a special service. Calling a wizard and conducting equipment diagnostics are most often free.
Repair Cost
If you need to adjust the closer, you need to pay a service in the amount of 700 rubles. In the event of a breakdown in the handset installed in the subscriber’s apartment, it will be necessary to replace it. This service costs about 900 rubles. If you replace the system or its elements, the total cost of repair can be about 1200 rubles. If necessary, replace the buttons, lock or other elements, the price will be about 1,500 rubles. At the same time, verified companies provide a corresponding guarantee for the work performed.
The lock does not open
In some cases, equipment owners say that the key to the doorphone does not work for them . This item may need to be replaced. However, you should also check to see if the lock is magnetized. In some cases, even if the circuit breaks, a small charge remains on the surface. He does not allow to open the door. In some cases, the user may think that the key is out of order.
It is easy to check if there is another device for unlocking the lock. Two or three keys at the same time can not work. In this case, you will need to turn off the power to the device. The lock in this case is completely demagnetized and opens.
To solve this problem, you will need to stick a small strip of adhesive tape on the metal plate of the door. This situation occurs due to improper operation of the system. Failure in this case can provoke the power supply, controller, lock. Finding a reason can be difficult without the help of specialists. Therefore, the method with adhesive tape is simple and effective.
No buttons pressed
Sometimes it’s very difficult to figure out why the intercom does not work . However, if the buttons are not pressed, the reason is most often obvious. Such a breakdown is usually found in digital versions of intercoms. They are installed in apartment buildings. A large number of users can often click on buttons.
Such equipment uses the principle of intersecting light rays to read information from the front panel. This is a fairly sensitive system. With pollution, high loads, it can malfunction. In this case, an error may occur when you click on the apartment number. The letter E or Err will be displayed on the screen.
If the buttons still work periodically, you will need to conduct a quality cleaning of the surface of the front panel. Perhaps dirt, various debris led to a similar problem. If the buttons are not pressed at all, the processor may be out of order. In this case, you can’t do without calling the wizard.
I can’t answer the call
In some cases, the intercom handset does not work. In this situation, the signal is transmitted from the central console to the appropriate apartment, but when you pick up the handset, the subscriber cannot answer the call. The signal continues to flow to the device.
The reason for this may be the deterioration of certain moving elements. When removing the handset, the switch should operate. In this case, several varieties of systems can be used. In the first case, to stop the signal and connect the subscriber to the guest, a magnetic reed switch is installed in the handset. In the second, the microswitch performs this function.
If such a malfunction occurs, you will need to replace the handset. Otherwise, the user can disassemble the equipment and, using soldering, remove the failed movable elements. In this case, you will need to install new parts in the appropriate places. This procedure is also carried out by soldering. It is easier to purchase a new handset and replace failed equipment on your own.
The button on the handset does not work
One reason why the intercom in the apartment does not work may be a malfunction of the button on the handset. In this case, the subscriber can receive the incoming signal, but cannot open the lock. There may be several reasons.
If the button periodically still opens the front door at the entrance, you may just need to clean the structure of dirt. The button may sink over time. Plastic, the contacts of this device may wear out over time. This leads to problems opening the doors. You will need to replace the handset.
However, the reason why the signal is not transmitted to the lock may be interruptions in the communication network. Also, a malfunctioning controller can lead to a similar situation. If the neighbors have similar problems, you will have to call the wizard. He must check the basic system and elements of communications equipment.
Sound transmission problems
If the intercom stops working , you can correct the situation yourself. However, this is not always possible. If there is no sound in the handset or there is strong interference, the cause may be incorrect connection of the wire. Terminals may be loose. This situation sometimes occurs if the subscriber pulls the handset with a wire. Contacts may become loose, interference may occur.
If there is no sound in the handset at all, the communications of the general network may be broken. In this case, it is recommended to consult a specialist. He will be able to determine with the help of special equipment on which section of the circuit there are malfunctions.
Also, the reason for the lack of sound in the handset may be incorrect adjustment of the regulator. You need to find the appropriate lever on the equipment. With it, you can increase the volume of the signal. If after these manipulations the sound does not appear, you will need to consult a specialist. He will conduct a diagnosis and will be able to advise the most correct solution to the problem.
No call sound on video intercom
Knowing the most likely reasons why the intercom in the apartment does not work, where to turn for help, you can quickly solve the problem. However, more complicated repairs are required for video intercoms. This equipment also breaks down quite often, even if very few people use it.
Often there is a situation when a call signal is turned on on the screen, but there is no sound. The user can notice that they came to him only by video signal. In this case, you need to turn off the intercom from the network. After 5 minutes you need to turn it on again. Some models of technology after this begin to work correctly. In most cases, such an error will not appear in the future.
If this does not help, you will need to call a specialist. He will conduct a diagnosis. If necessary, a specific part will need to be replaced. It is not possible to fix such a problem independently. If the video signal is not received by the device, you may need to make a complete replacement of the equipment.
Screen image missing
If the intercom with the screen does not work , there can be many reasons for this. If the video screen lights up when you press the call button, but the image itself is not there, you need to check the position of the brightness indicator. If everything is normal with him, you need to check the peephole. In some cases, it becomes dirty or specially sealed.
If the screen does not even light up, but there is sound, a serious repair will be required. In this case, it will not work out on its own. In some cases, you will need to purchase a new intercom.
Having considered the main reasons why the intercom does not work, you can try to correct the situation yourself. However, in most cases, specialists cannot do without the help of specialists.