Have any of you seen a problem on the CWIL board that causes pin 6 on the U13 chip to burn out? I have replaced the CWIL board now three times. The last time I replaced the S24-1 and S24-3 boards also. The board will last about a week or so then has an SPI Loop error fault, and we find the burnt chip.

Pin 6 is P24M. Only thing I could think is you’re somehow getting 120vac on P24M. Could be from quite a few places. Goes to door board, buzzer, car light/fan relay, access switch, car top inspect switch, lanterns, SPI loop, & selector. U13 is the only chip on the CWIL that’s connected directly to P24M.

Thank you. I will check and see if I cant get it to show up before i replace again. I'm also going to check the 24 volt power supply.

Ya, maybe if it had way too much AC on it. Good one though! Keep posted

In case someone else has this issue. I put a power monitor on the incoming power to make sure I was not getting a surge or something bad on the incoming power. As suspected it did not show anything abnormal. Out of desperation cut all the wire ties in and around the COP. I found several wires that had been pinched under the wire ties so hard that you could see the bare wire. Ever since we have had no issues.

What power monitor did you use?

Wow, good find Randy.

Montana

I used a Fluke 1750. It is a great tool, and the storage capacity is good for anything you would ever want.

Wow! That’s a hell of a nice tool. Your company must like you a lot more than mine likes me.