bed elevators

After the bed elevators, the short circuit phenomenon is eliminated, which proves the problem of the integrated block. After replacement, everything is normal on site. elevator serial fault example The elevator cannot run normally, and the machine room fault codes: EB, EC, EF. Analysis: Generally speaking, it is impossible to have more than two kinds of faults on the line at the same time. Moreover, the car serial and the landing serial are two different lines. In this case, only the management side has a fault. The problem must be on P1. There are two other possibilities: 1

The P1 board is broken; 2. The program chip is broken, and the management program chip is CC. I found a problem with the CC chip through component replacement. Uncover the label attached to it and expose the chip window. It is easy to find that one of the lines is broken. Note: When inserting all the chips, be especially careful not to turn the pin direction upside down, otherwise the chip will be damaged !! How to distinguish it,

I believe everyone should know that I wo n’t mention it here. An example of Mitsubishi  elevator repair is that a 13-story station elevator fails, P1 board code: 8.8. First, the maintenance workers exchanged P1 board and E1 board to find out the problem, but failed to detect it. On site, first measure the voltage of VCC ~ GND, the actual voltage is 4.85V, and it is not normal to adjust to 5.0V; then remove the flat cable connected to the E1 board, after power is supplied, the P1 board displays various fault codes, proving that the P1 board is working now It is normal, the problem is in the drive circuit. Check that the IGBT, capacitor, rectifier circuit, etc. are normal, and then personally swapped the E1 board from the elevator next door.

The phenomenon is the same; it is about the residual magnetic field of the motor. It is used today. After the motor wiring cover is opened, the power is sent. In the automatic state, the E1 board only displays EC, which proves that the problem has been solved by half. Check the P1 board circuit again, and find that the maintenance staff's P1 board is changed from another unit. The version is different from that of this unit. 

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