Lithium battery system problem. Help!

[Convertible13]

I inherited a lithium battery system when I bought a Morgan 321 a couple years ago. My knowledge is limited.
Normally to engage the lithium batteries and power up the system, I turn the main battery switch to the lithium batteries and push a contactor button to engage the contactor which completes the system.
My problem now is when I hit the contactor button, the contactor momentarily engages but won’t stay engaged. If I switch over to the backup AGM battery, the contactor automatically engages and stays that way. It doesn’t have a contractor button.
I’ve replaced a relay and the ECPC 404 intelligent meter and still have the problem. I’ve included the schematics that came with the boat. Any help would sure be appreciated. Thanks!

[Flod]

Have you measured the battery voltage? If it’s outside the 10-14,6 envelope that is specified it should disengage as I read the drawing

[Convertible13]

Thanks for the reply Flod. . I’m at 13.3 v so I don’t think that’s it

[s/v Thea]

Looks to me like your JLD404 is either defective or not setup properly. If you don't have manual on it, you can find online.