Not related to your original question but since your install is new thought this info might be valuable.
My EC-30 kept losing communication to the control unit. I had Onan move the box into the overhead of my RV near the gen-start switch. I have a lot of metal between the generator bay and the inside of the coach. The instructions don't say you can do this but it can be done by wiring the control box to the gen-start switch. Should you lose communication, consider moving the control box inside. You will need to find a 12 volt source from the house batteries. In my case, we used the hot side of the boost switch for that 12 volt source.
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Pete - Full Timing
2000 Country Coach Magna 40' Indulgence, CAT C10, #5892
2019 Ford Ranger XLT
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