2003 American tradition ats codes

[jeep3501]

I have a 2003 American tradition model w. It has the esp ats panel not sure of the model panel. Everything works fine when running on the generator or plugged into shore power. When you are running the generator and start the motor to drive down the road it brings up these 4 codes neu u01 c03 gen. I can’t find anything online about these codes. Any help would be appreciated. Thanks

 

[Gary RV_Wizard]

I assume you are looking at the remote power monitor display for the ATS, which includes power quality management. "neu" is code for the neutral wire and gen is of course generator. I used to have a list of the fault codes used on the ATS remote display but can't find it right now.

Do you have the original Trace ATS/power monitor or has it been replaced with a later model, maybe from Surge Guard. Many of those 20+ yo ATS systems have been replaced by now.

 

[jeep3501]

It is all original. It is the panel in the bed frame.

 

[Gary RV_Wizard]

Yeap, that's the Automated Engineering Corp remote associated with the company's ESP Auto-transfer Switch with built-in power quality monitoring. I had the same in my '04 Tradition but had to replace it in 2009 after the ESP ATS module began to throw erroneous ground faults. Trace/SurgeGuard subsequently picked that AEC product and made it their own, with the essentially the same ATS but an improved display with actual text messages rather than codes.

My recollection is that nEU U001 was an open neutral fault, but my memory of that is really vague. Sorry I can't be of better help.

Update: I found this old post about the ESP nEU fault:

ESP Fault with nEu code - iRV2 Forums

I went to the coach this morning and there is no power to the coach. It is in storage and plugged into 30 amp shore power. Both coach battery banks and chassis battery banks are completely dead. There

www.irv2.com

I'm thinking the transfer switch part of the ESP is the problem, but not sure why/how starting the engine would trigger it. Starting the coach engine causes a switch in the 12vdc management from house to chassis side, but wouldn't seem to affect the 120v operation (but somehow it did).

 

[jeep3501]

Ok thank you. I read that whole post you sent me a part of. I haven’t tried everything that I read in that post yet but working on it. I’ll see what I can find thanks