STOP!!!!!!!!!!!!!!!!!!! You all are jumping ahead of the troubleshooting for this set.
Lets ask some questions first. When you start the set, and then turn on the S7, (battle short), and release the S2 (Start switch), is there one of the red idiot lights come on, on the fault indicator? If so, what light? When you press, the press to test switch on the Fault Indicator, will all the lights come on? When you release the reset switch, do all the lights go off? I always did a reset before I started the set and after I started the set. Just to be sure.
When the set is running and the S7 is turned on, it bypasses all those safety functions. BUT the fault light MUST come on. So if it doesn't, there could be something else wrong. Not a safety function. Like the A4 card, or the K1 Relay on the A4 card. Open the control panel, take the 4 ea. nuts off the A4 card, pull it forward, and look at the back side to see if one of the electrical traces is burnt through. Use a flashlight. Then take the K1 relay out, and swap it with the relay below it. Try and start the set normally. What happens?
Also, keep in mind, there is 24 volts hiding in there to bite you. And when its running, AC voltage in there also.
Now I am off to a rock concert. Might be able to work this later tonight. Might not.