Wado,
E100 = Main Processor Restart (Displayed when the fridge is reconnected to power)
E101 = Low Voltage Cutout (Battery voltage drops below the minimum cutout voltage set in the controller)
E102 = Low Startup Voltage (Battery voltage is too low for fridge to start)
E104 = Failed To Start
Have a look at the attached link (same one as before). There is a pic in it that has a description of the errors (bottom left).
http://www.exploroz.com/Forum/Topic/73802/Reefer_90ltr_Fridge_-_Owners_Manual.aspxI sometimes get these errors on ours as well. They don't effect the operation of the fridge.
I find that if I disconnect the 12v lead and let it sit for a while, the E101 & E102 messages are cleared.
Also, error messages can be cleared by pressing the "READ" button on the controller when the errors flash.
If you go searching into the guts of the controller, there are a LOT of functions, but I think most are for tech diagnostics.
If the fridge is functioning OK, I doubt you've done anything wrong. I don't bother burying too deep into the controller functions.
My settings are: T=1, H=5, B=11.8. I find these work well for me.
What are you using with yours?
Cheers,
Geoff