The 4 blinks represent the algorithm...u r using #4 (out of 10). The red/green alternating blink means "battery disconnected".I have an Elcon 96-12 connected to charge 30-100ahr thunderskys with mini BMS. When I plug in the charger it Blinks 4xs and then starts alternating red and green at a second interval, and the batteries are connected. I don't know what the third wire married to the leads is for?? Any Help
Was you charger originally made for lithium or pb?
Do you not have a manual?
If it was made for lithium, you need to supply it with 5 volts before it will charge...going from memory.