Cal spa system 2100 circuit board manufactured by Balboa instruments.
This Circuit board will replace Cal Spa circuit boards chip #'s CS5000R1D C2100R1A, C2100R1B, C2100R1C This board can also be used to replace C2000R2A, C2000R2B, C2000R2C. There will be a reduction in the default length of the filter cycle when replacing these boards. It will drop from 4 hours to 2 hours.
Manufacture : Balboa
Manufacturer Part No: 52299
Cal spa part # : ELE09100205