mep803a was generating power to home but not now

[Retired Wood Guy]

Hi I am new to this invaluable form Steel Soldiers but not getting lost chasing rabbit trails.
Short story. Generator worked flawlessly 3 years ago for Hurricane Ian.
I shut down after 30 days in 2022 October.
I had been cranking every few months to keep active.
I needed home power about 4 months ago and set would not generate power.
I printed the TM 642-24 and started the eating procedures and following all you guys on the post.
I have tested S5 a couple times. one test good. one bad. i tested again for 3rd time and its good.
I also tested S5 diode between points 2 and 5 and did seems in right direction and tested ok.
I have power to the convenience receptacle
I bench tested the K1 relay and it had to be helped closing.
I have a new K1 relay from Callie colt.
I installed and it will not close in while running the set.
I do not believe I am getting 24 volts to y on K1
I read on this form to check the terminal plug where it goes through the panel and spray with contactor spray cleaner and re connected.
my 3amp td fuse next to ac interrupter is good.
I have written down all my testing but am now getting weary and in need of help.
Thank all of you fellas on this Form. It has been so helpful at finding out what my problem is not. I haven't hit the problem yet but hopefully with help I will.
Bob

 

[Scoobyshep]

Hi I am new to this invaluable form Steel Soldiers but not getting lost chasing rabbit trails.
Short story. Generator worked flawlessly 3 years ago for Hurricane Ian.
I shut down after 30 days in 2022 October.
I had been cranking every few months to keep active.
I needed home power about 4 months ago and set would not generate power.
I printed the TM 642-24 and started the eating procedures and following all you guys on the post.
I have tested S5 a couple times. one test good. one bad. i tested again for 3rd time and its good.
I also tested S5 diode between points 2 and 5 and did seems in right direction and tested ok.
I have power to the convenience receptacle
I bench tested the K1 relay and it had to be helped closing.
I have a new K1 relay from Callie colt.
I installed and it will not close in while running the set.
I do not believe I am getting 24 volts to y on K1
I read on this form to check the terminal plug where it goes through the panel and spray with contactor spray cleaner and re connected.
my 3amp td fuse next to ac interrupter is good.
I have written down all my testing but am now getting weary and in need of help.
Thank all of you fellas on this Form. It has been so helpful at finding out what my problem is not. I haven't hit the problem yet but hopefully with help I will.
Bob

If it's just not getting past the contactor the good news is it's a fairly simple control circuit just have to figure out what is not allowing it to close.

By the way Geneva Florida as in right next to Sanford?

 

[Retired Wood Guy]

yes
My 2 sons in Army (retired) grew up here In Geneva.
1/2 way between Sanford and Titusville

One of the last things was tracing was the x and y on k1
I pulled of wire leads x and y just to make sure the new K1 i installed was working. It was and working.
I had 24v dc on Y. I don’t remember if closed the the s5 or not but I think I closed the s5 to check For 24 dc Reading.
I feel like the X on the K1 is the negative, Am I possibly correct?
The X on the K1 goes to the K20 oil pressure relay.
I had a new one so I replaced for good measure.
I checked the diode CR1and CR3 and the values and they were good.
Going to call it a night.
Thanks for any advise