I realize that this is long past being helpful, but maybe it'll be helpful to someone else. Due to just having one in our shop, the Saft Power Systems chargers as well as the V Force chargers are made by GNB. The one that we had in particular matched up with the SCR FLX series chargers.

As for the question asked, that's not a good code to see. It means:

Fatal failure of the charger (Overvoltage or Overcurrent protection or multifunction of Start Stop signal).