【 Weak current College 】 Mitsubishi SPVF (MPVF) Elevator malfunction analysis

1, elevator call failure?

The elevator can repair operation, you can auto-leveling, automatically return to the base station. Check all external lines correctly, is p1 onboard Serial lamps stm does not Flash, indicating the serial system does not work properly, the spvf serial system is divided into two branches, one from the engine room to the outbound ladder, a team from the engine room to the directive and the pointed layer, usually the serial system error has many manifestations, single storey error manifested as just that layer cannot call, error 2 floors 2 floors as cannot call between (because the system can transmit sense and bi-directional); there's an error caused the layer staircase light never dies, Elevator automatic response the layer; sedan error performance instructions for each layer are lit, the elevator layers stop; or referring to the layer is not displayed, the floor does not change; these phenomena are serial error.

Occurs, the first on the basis of its structure found in either a branch, and then find that a part of good maintenance, the serial system mainly includes p1 Panel 2 interface chips, and some current limiting UPA67C, limiting voltage circuits, each room is fitted with a door box m5690, integrated chip m5226, sedan staircase Board and display Board also m5690, m5226, these are the serial key chip. As long as the replacement will not need to buy a Mitsubishi high Board.

2, 89 relay without action?

Elevator Safety loop, external line normal, it is unable to start (89 relay not action, 89 led not lit). First of all, once again confirmed the safety circuit of normal 29, we can't because 29 light would take it that the safety circuit is normal, the safety circuit is the SPVF 79 Terminal through the switch then current limiting direct input P1 plate, so sometimes a low voltage can also enter P1 plate, causing a security loop normal rate, but a lower voltage does not promote 89 relay for action. Therefore safety circuit short-circuit is not very serious, it may not be fire insurance, which is causing this behavior. We can measure safety circuit to ground resistance and safety circuit voltage points. If the safety circuit is normal, we look at the foot of W1C-P09 P1 is output low voltage, because this point P1 plate output easily damaged, if you look at the output transistor p1 plate and alignment, generally find fault.

3, the door panels have a problem?

Door Board adopts voltage speed control for 3 phase control, and close the door after one of decompression phase through resistance continued to maintain a small torque to prevent the door was open, this is the Mitsubishi spvf ladder runtime always closes the signal output, but also because this door plate permanent jobs, to door machine board electronic devices require a high level, door position signal through a grating plate to sampling. Grating plate position is very important, although it seems to be dead, or you can fine tune, in short, in the course of the switch, you must see the LED lights-off-off-off-off process, otherwise the elevator door looks normal, real in Terminal motor also then run for a long time, door panels will be ruined. Door Board unless the full intake can no longer use, or a good repair, see the Red modules, usually this thing doesn't work, he is ok.
4. a run to protect themselves?

General elevator has a fault inspection system, a run on only the fault itself at run time before it was checked out, such as elevator overcurrent, coder no output, drag the data do not match, and so on, because the earlier elevator cannot memory fault, so each time after power failure occurred a run is self-insured. On this failure, we'll find a captive insurance reasons, in the absence of maintenance machines, we first look at the encoder, the output of the encoder in motor rotation is 2.5v AC, stopped the voltage should be less than 1VDC, no problem if the encoder, external wiring is normal and may cause overcurrent, the outputs may be really over current, such as motor over-current, Elevator overload, current detection unit (dc-ct). In E1 Board we can detect the ct of bias, if it is not, you need to adjust the OFS potentiometer dc-ct, how to adjust the SPVF installation manual.

5, half open doors?

This is a very simple question, is listed here, because this kind of failure frequency is too high, General door safety edge connector because the door is often broken or short circuit the games, such as door movement safety edge connection time pass off causes the door shut and open part.

6. write to a floor monitor does not Flash?

In debugging and maintenance we often have to write the floor height, actually writes the number of floor impulse, deceleration point location. If you write floor indicates no blinking or flashing stop flashing after the data is not entered, this usually is due to the Mun signal and forced reduction is not working properly, one-way forced deceleration signals have forced floor 1, Mun is the key to great sampling floors, some overseas Mitsubishi Mun signal 2, a push for relay, a type of computer, do not see the DZ relay or computer Board of DZ lights that Mun signals properly.