Autopilot tacking

[daknecht]

I have a EV-1 ACU-100,P70 wheel pilot on my boat. I added an e95 chart plotter this spring and updated all the software in May. In case it is relevant, in the process of updating, the EV-1 was not recognized and had to be sent back to Raymarine to be updated. The autopilot works fine in locked mode. However, the autotack no longer works correctly. First, it tacks very very slowly. Then it overtacks to about 60° apparent (from 38° apparent). It then very slowly comes back to a more correct heading but during that time, the off course alarm is going off. Sometimes it would come back to the correct heading and other times it would go past head to wind. It is set to wheel pilot and sailboat and I have tried both performance mode and cruising mode and it did not seem to make any difference. What should I do to get it working correctly again?