Fault Codes/Blue Star Power Systems/CBlue Star Power SystemsCUnclassifiedElectricalWhat This Code MeansBattery Fault alarm active; Battery Fault LED activePossible Causes•Battery disconnected•Battery polarity reversed•Mismatched charger and battery voltage•Open or high resistance charger to battery connection•Open battery cell or excessive internal resistanceRelated Blue Star Power Systems Fault CodesRED LEDSCR FAULT CODES1DEF QUALITY ALERTDERATE WARNING400F4181UMISFIRE CODES81ONOX FAULT59(2)Browse all Blue Star Power Systems fault codes→ASK RUDY ABOUT THIS FAULTGet a diagnosis walkthrough for C on your specific Blue Star Power Systems unit — cited to the OEM manual, not a forum guess.TRY IT FREE