Pentair Intellichlor ICXX SWG - Further Reading

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Cell Usage

Pressing and holding the “More” button launches the System Status Mode. When the lights finish scrolling, the percent lights indicate hours of usage in 1,000s. For example, if the 40% light lights, that indicates 4,000 hours.

Flow/Temperature Switch

The flow switch also contains a thermistor that senses water temperature. The water temperature is used for the salinity calculation. If the thermistor is failing the salinity will be incorrect.

Flow switch has 4 wires:

  • Red/black - flow switch
  • Green/whire - temperature sensor

With no temperature input, the cell defaults to a temperature of 77 Fahrenheit. The sensors are prone to failure. When the sensor fails and it's obvious to the software that the sensor has failed, it defaults to a standard temperature of 77 f.

High Salt

High salt error occurs around 4500ppm. The cell will continue generating chlorine with a high salt warning.

Low or High Salt Lights

Always check salt level independent of the cell before adding salt. A failure of the temperature sensor will give incorrect salt warnings.

Cold Temperature

The cell will stop generating chlorine when water temperate is below 60 degrees.

If the cell light says cold when the water is warm, the temperature sensor is likely bad.

Displaying Cell Water Temperature

Version 3.1 on adds the ability to determine system temperature. Pressing the “More” button after the display shows 1,000s of hours of usage, will show temperature as follows:[1]


Lights Temperature
No LEDs Below 30F
40% 36 to 45F
40% and 60% 46 to 55F
60% 56 to 65F
60% and 80% 66 to 75F
80% 76 to 85F
80 and 100% 86 to 95F
100% 96 to 99F
100% blinking over 99F
All LEDs blinking Sensor bad

Press and hold the More button until the lights scroll and note which % light lights up. Then, immediately press the More button again and see which % lights light up.

Salinity Calculation

The salinity is calculated based on the conductivity of the water and the water temperature.

The conductivity sensor is a separate device in the cell which can be seen if you look in the cell.[2]

The Intellichlor manual states that the salinity accuracy is +/- 500ppm.

Cycle Time

The Intellichlor cycles the % generation in 5 minute intervals. If the % generation is set to 50% the cell will generate chlorine for 2.5 minutes and be idle for 2.5 minutes.