Ser#A955N01875K unit has a good battery but wen you turn on the key switch it powers up the cooling fans on a check im guessing,, then after that will not do anything i hqve checked the fuse bank the battery has proper volts and im sowing no power to contacter and it shwing a code of 12546 thatsa battery is dead code but the battery checked out. So we pulled a unit off the floor had full charge qnd plugged it into this machine same code showed on display..is there a large 40amp to 300amp fuse some place i cant find any ?

Thank you
Art