The original problem was that the pilot arc wouldn't light; cup error light, changed consumables, tested the torch to find proper readings both with and without cups, ran through the input/output rectifier troubleshooting part of the manual to determine the SR2 was bad. Once the SR2 was replaced with a new one, I ran through the tests again and got the appropriate readings. Went to test the machine and it still gives me a cup error light and the pilot arc still wouldn't light. Gave me airflow at first but after turning the machine off and then on again, I now don't have airflow.
Help would be greatly appreciated as this machine is holding up work.