TDI AHU ; 00575 - Saugrohrdruck Regeldifferenz | Posts 32+

Hi,
Why don't you remove the actuation rod (using a circlip) and unscrew the pressure sensor? Then you can manually check the valve's movement, inspect the pressure sensor, and, if necessary, drain any oil sludge?
Adjust according to RLF guidelines during assembly.
You might damage the membrane with an overpressure of two bar.
hg
Herbert.

Good morning, Herbert.
If the error reappears, I will probably have to do it.
"2 bar is the pressure the can should withstand, which is the normal pressure exerted on the can, right?"

The membrane activates at approximately 1.6 bar of absolute pressure. This corresponds to only 0.6 bar of gauge pressure (relative pressure). Therefore, heed Herbert's warning: do not exceed a pressure of 2 bar when using the compressor.

The engine is running at a pressure of 1.9 bar absolute, which is equivalent to 0.9 bar above atmospheric pressure. The N75 valve modulates this 0.9 bar overpressure down to 0.6 bar overpressure using atmospheric pressure, and within the range of approximately 0.55 bar to 0.65 bar, it opens or closes the wastegate accordingly.

In addition to manual movement, you can also automate the movement of the rod. To do this, connect the N75 to a pressure regulator with approximately 0.7 bar. Then, connect the control of the N75 to a turn signal bulb and activate the hazard lights. The wastegate will then move back and forth approximately once per second as long as the hazard lights are on and there is still pressure in the system.

Regards,
Guste.

Hello.
Thank you for the tip about using the hazard lights.
I probably phrased it poorly. I applied a pressure of 2 bar absolute pressure using a pressure regulator, and that seems to have been enough to survive without damaging the container. As I mentioned, the problem is no longer occurring. I will provide further updates.