In my Agilent LC MS/MS 6410B a vacuum and communication is presenting repeatedly. After system is stable, it suddenly (minutes, days, weeks) shows either 1.23 or 5.7 error. Both indicating an error in rough vacuum or high vacuum respectively. Sometimes the system lose communication. I have changed the smart card, AC board, the gauge, rough vacuum, oil and the problem persist. Additionally, the LTD report, advisor, indicates "Emod fun fault". Any idea of what to do? What is the emod fun or what funs do we consider change? Thanks for your help.