FAQ: High quality cooling for the CBU units - a must!
In order to assure of the proper balancing function of the CBU units, it is necessary to mount the CBU modules onto quality coolers. The high quality cooling allows to release the extra energy that would otherwise cause the overcharging of the cells.
The RED color LED on the CBU units indicates that overheating is occurring. In such a case it is recommended either to increase the effectiveness of the cooling or to reduce the charging currents.