Originally Posted by junsi
You can press STOP for 3 seconds to monitor the voltage of each cell to see if there is any difference between the displayed voltage and your measured voltage? If different, please check if the battery balance port, the wire from balance board to the charger, and the balance board are damaged?
I'm not using a balance board and have checked all the external wiring. Everything works perfectly when I plug the balance connection into the good charger in an identical way. When I plug into the other charger it immediately says "Reverse Polarity Check Connection" and starts beeping rapidly. Pressing the stop button for 3 sec. does nothing.
Thanks Junsi for your reply and any help with this.