[CA] [CA11] ST60 and ST60CH issues with new wind vane

[beckett]

I have the following issues with my wind Raytheon ST60 and Raytheon ST60CH instruments:
They do not show accurate wind angles, the wind speed is not accurate and constantly changes from anything to 99.9 knots. After certain time the instruments beep 4 or 5 times and reboot showing "---" and then the cycles repeat themselves.

My boat has one Raytheon ST60 and one Raytheon ST60CH(close-hauled) as a repeater. While our must was out we replaced the wiring and installed a new ST60. The older wind vane was with cups that are shaped like trapezoids, I think it must be the older ST50. I checked the voltage and the wiring and everything is OK.
Here is what I have tried:

I have reset the ST60 displays to the factory settings and linearised them by going 2 full circles. That helped a little with the wind angles but not with spped and the ST60 still resets themself. Is there anyone I could consult with to fix these issues?