I just realized that my credit card acceptor has not been working for around a week so I checked it out with a voltmeter. The meter was telling me that the credit card reader was dead. So I called Hamilton to help me troubleshoot the problem. First problem was they could not dial into my entry system (acw-5). So I tried to post a report by hitting F2, F2, Y on the handheld. That is why the handheld (first picture) had the “LAST POST **ERRORR**” message, this means that the entry unit can not dial out. The problem ended up being a punch down that broke (second picture).
Then I called Hamilton back again and they trouble shot the credit card acceptor again and declared it dead. It is still under warranty so Randy Nix at Eagle Car Wash fixed me up and they are going to send me a replacement. I really appreciate Randy; he is a great Hamilton Distributor and guy. He even calls back and handles problems for you!