EAS errors are the most talked about issue on the P38 forum. What have you done so far? What have you tested? where have you checked for leaks? have you jumpered at the main connection to raise and/or test your compressor? Have you read the trouble shooting guide? Do you have an error message? Have you read the codes?
Before anyone can help you we at least need some basic info as to what the system has been doing and most importantly what you have done so far to try and fix the issue.