Fault warning code 03
powered up the new 2000W inverter/charger and it started beeping with an 03 fault warning which is Battery over voltage.
I powered down and tripped the lead out to the battery so that i could cycle through the menu and make changes to the settings- first I made sure the battery selected was correct for my AGM 100w batteries. restart was good with no fault warning, then connected to shore power and started the air-conditioner. it ran for approx ten seconds then tripped the inverter internal breaker as well as the battery 200A breaker. after reset Im back with the fault 03 warning. the manual sucks and there is no trouble shooting. I cant change the battery voltage settings because its preset, the only option would be to go custom setting but im not sure this is a solution - any advice would be greatly appreciated.