The building intercom ammonium host rings upstairs, but the door can t be opened, and the magnetic c

The common faults of building walkie-talkies mainly include the following, the whole machine does not work, can not call, can not intercom, can not unlock and so on. Before maintenance, the exact fault point should be found, and the fault location can be determined by tracking the fault, and it is clear whether the host is faulty or the individual household extension fails, and corresponding maintenance measures are taken.

Wiring diagram of building intercom system.

There are two common faults in the power box: one is no voltage output, and the other is that the output voltage is lower than the normal value. The common causes of no voltage output are fuse blowing, step-down transformer open circuit, rectifier filter circuit damage, and broken connection line between the power box and the main unit.

The fault phenomenon is that the indicator light is not lit and the whole machine does not work. During maintenance, the fault range can be judged by measuring the voltage of the power input terminal of the host or by replacing the power box and directly supplying power to the host with a 12V battery. During maintenance, you can replace the fuse, connect the disconnected wire, replace the power box, etc.

It may be that the ground of the lock body has poor contact, and carefully check whether there is a break in the middle of the line.

This kind of problem can be found in the property, and the property will take care of it.

They are, 5 years warranty. Top 10 brands of building intercom doorbells The real top ten brands in the country are not evaluated every year, and the most authoritative is the China Public Safety Magazine.

1.Bad unlock button, 2The unlocking signal line is broken, 3There is a problem with the host to the lock, either there is a problem with the line or there is a problem with the lock, and the problem will definitely be solved by pressing these three articles.

The general non-visual intercom ** is 4 wires, a positive pole, a negative pole, an audio, a household line, like you said the fault should be ** The touch switch is broken, you just buy one and replace it, a few cents a, you will open the door if you short the positive and negative poles!

Whether the next-door neighbor's unlocking is good, if it works, it means that there may be a problem with your extension, or the unlocking line is broken.

If the neighbor's is not good, it is a problem with the main line or a problem with the lock, it is recommended to find a property or maintenance manufacturer.

I checked it slowly.

1.Determine whether the equipment is good or bad (substitution method).

2.Detect the voltage of the two wires that supply power to the electric lock when pressing the door opening button upstairs (multimeter) 3Is the pressure drop too large.

Is the wire of the electromagnetic lock loose?

A problem with the management machine setting! Double-check the settings of the management machine.

Possible reasons for not opening the door: check whether the door line is connected incorrectly or has poor contact (digital system: line 3 from extension to decoder; Direct press type: check whether the extension to the door machine line 2) and the extension itself is normal.

Solution: Use a replacement method to change a good machine to see if it is normal, if it is not normal, check whether the wiring is wrong.

Note: Some users can't unlock the lock, and the general problems mainly appear in three aspects: lines, indoor extensions, and floor platforms; First of all, you should check the extension that can not open the door to see if there is a phenomenon of poor wiring (it can be used before, it is impossible to connect the wrong one, only poor contact will occur) with a universal meter;

Note: If there is no floor platform for the building intercom system, it is generally impossible for some users to fail to open the door! Once it appears, it is a serious situation such as all users cannot open the door to use.

Solution: Disconnect all wiring, and then according to the wiring diagram of the intercom project, access the building intercom system from a new household, and re-debug to solve the problem; If some users can't use it occasionally, it is generally the fault of the indoor extension, please replace the indoor extension.

First of all, check whether the unlocking button on the extension is normal. Then find out which two lines from your home to the weak current well are the lines that control the communication. Check if it's a short circuit or an open circuit. You can find out the problem.

There are two possibilities: 1. The unlocking signal module on the circuit board is faulty; 2. The signal line is broken or the contact is poor. Check the extension and the short warranty (floor platform) of your floor, it should be due to one of these two places. The easiest way to do this is to call ** to the property.

If it can be used normally, it may be that there is a problem with the indoor extension of your home, and it is recommended to contact the property management to solve it.

com line drops, or poor contact.

Try to change the lock again, and if it doesn't work, find someone to check the intercom equipment.

Can't see people, can't open the door? It should be a question-type source question that the ** line in your home is not connected. But if you can't open the door, it should be that the main line is missing or loose. What else can be Shankuan, and then contact me to help you answer!!

It depends on what card is the intercom. Otherwise, you'll be asking in vain. Different manufacturers have different wiring methods.

The circuit is stringed, even if the ** is hanging, the circuit is also in a connected state, so the sound of talking can be heard downstairs.

Our house used to be like this, and the property owner said that they sent someone to repair it.

When the extension rings bai, it means that the speaker of the earpiece du is good, and the voice of the extension can be heard downstairs, which means that the microphone answer (microphone) in the earpiece is good and it has nothing to do with the earpiece being hit.

The problem lies in the fork spring switch of the extension, also known as the frog switch, and the four-legged extension has been repaired a lot, so it is good to change it.

Generally, the door opening will not work.

It is also a change lock button.