Ok, after studying service manual and searching, it appears that the delay is normal (12-16 seconds). I have found nothing about the high pitched noise, but it is barely noticeable when the control module is put back in the cabinet on the far side of the water heater...
Thanks all that offered suggestions, it appears that it is working normally now. I suspect bad connection that had it working differently on the previous times we used it. I am glad it was not bad, I have learned more about my trailer now and will know how to troubleshoot the water heater should the need arise in the future.
