Do elevator maintenance will often receive such a consulting call: “elevator system crash, cut off the power to return to normal operation.”

In fact, the so-called crash here is not the CPU of the main control board is dead, different from the computers we use in our work, it will return to normal after power failure and restarting, but due to the main control board detects the more serious faults, in order to ensure the safety of the protection measures taken by a. The elevator must be diagnosed and processed by professional maintenance personnel. That is to say, it must be diagnosed and processed by professional maintenance personnel to solve the problem fundamentally before the elevator will work normally and safely.

After the elevator has this kind of protective shutdown, many people tend to cut off the power and then send power, as long as the elevator can continue to run that there is no problem, which is very dangerous. The problem is not solved, this situation will occur frequently, so here we recommend that you do not rush to restore the elevator to run, but to carefully analyze the fault information prompted by the main control board, follow the trail to find the problem point, and then let the elevator run after effective treatment. This will ensure that the elevator is running at a low failure rate and the safety is greatly improved.

Here we will deal with the elevator “dead” situation to do a brief introduction, I hope to give you a little inspiration, and in practice to use.

When there is a “crash” phenomenon, do not rush to power off, we must first look at the main control board on the fault is why the prompt. For example, there is a “holding switch error” means that the elevator in normal operation, the action of the holding switch and the actual settings are not consistent, this time the power off and then send power to the system may be re-run, but this is very dangerous, once the holding switch is really faulty will result in slipping car or the top of the serious accidents. This situation should be dealt with in this way:

First, find the cause of the failure, check whether the holding switch is bad or the action of the holding brake is not sensitive, or the line has problems and so on;

Secondly, troubleshooting, if the brake switch is bad, replace it, set it incorrectly, reset it and so on, until the fault will not reoccur;

Finally, according to the following table of fault clearing methods to clear the fault record, re-run.

The specific process is this:

Through this process, we can fundamentally troubleshoot the problem, there will be no beginning of the said “dead” situation. Therefore, we usually encounter similar situations do not rush to power off to re-run, but to solve the problem from the root, so that passengers ride more comfortable and safer elevator.

In addition, the elevator has some minor faults that do not affect safety, the system will resume automatic operation, but there will be fault records in the main control board. Every time when the elevator maintenance, to pull out and check it, in order to target the elevator maintenance.