Intec CA10 Instruction Manual page 19

E2 – The most probable cause for this error is having extremely low mineral
content in the pool water. The average Total Dissolved Solids (TDS) level for a
freshwater pool is 500 - 1500 ppm and salt water pools 2800 – 3500 ppm. This
error code will show on the display when the TDS is lower than 250 ppm. The
system is functioning properly. However, it will take a very long time to increase
copper levels in your pool. To increase the TDS, add a 40-pound bag of
swimming pool salt for a 20,000 gallon pool to increase the TDS level
approximately 250 ppm. See Table 4 in the back of this manual for calculations.
Polarity LED
The polarity changes after 10 minutes or when AC power is applied, but not via the ON
and OFF buttons. This is a self-cleaning cycle to keep the cathode and anode clean and
reduce the potential of mineral scale plating.
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