Originally Posted by Thumbolino
I have two 106B+ chargers and one of them gives a reverse polarity error when I plug in a 4 cell, 5 cell, or 6 cell balancing connector from a battery. It works fine on a 3 cell connector.
The other charger works perfectly when I plug in any cell count balancing connector, so I know the problem is not battery balancing connector wiring.
I just upgraded the firmware to version 3.14 and that did not solve the problem.
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?