Pentair IntelliChlor Troubleshooting Guide
Quick Reference
- The IntelliChlor uses LED indicators to show salt levels, cell status, flow, and temperature.
- Green lights generally indicate normal operation; red lights indicate issues requiring attention.
- Most problems relate to salt levels, water flow, or cell maintenance.
- Models include IC15, IC20, IC40, and IC60, differing by pool size capacity.
- Regular cell inspection and cleaning extends cell life significantly.
Understanding IntelliChlor LED Indicators
The Pentair IntelliChlor control panel uses a series of LED lights to communicate system status. Learning to read these indicators helps you quickly diagnose issues and maintain optimal chlorine production.
Salt Level LEDs
- Solid Green (GOOD): Salt level is optimal (2800-4500 ppm)
- Flashing Green: Salt level is too high (above 4500 ppm)
- Red (LOW): Salt level is too low - chlorine production reduced or stopped
Status LEDs
- CELL Light: Green when producing chlorine, off when not, flashing indicates attention needed
- FLOW Light: Green when water flow is adequate, red when flow is insufficient
- COLD Light: Red when water is below 50°F and chlorine production is suspended
Common Issues by LED Indicator
Red LOW SALT Light
Salt level has dropped below 2600 ppm. Chlorine production is stopped until salt is added.
View full guide →Flashing Green GOOD Light
Salt level exceeds 4500 ppm. Dilute pool water by partially draining and refilling.
View full guide →CELL Light Not On
No chlorine being produced. Check output setting, salt level, flow, and power.
View full guide →CELL Light Flashing Green
Cell needs attention - possible low salt, calcium buildup, or water chemistry issue.
View full guide →Red FLOW Light
Insufficient water flow detected. Check pump operation, filter, valves, and cell for obstructions.
View full guide →Red COLD Light
Water temperature below 50°F. Chlorine production suspended until water warms.
View full guide →No Power (No Lights)
Unit not receiving power. Check pump operation, time clock, fuses, and wiring.
View full guide →Low or No Chlorine
Pool chlorine levels are low despite IntelliChlor running. Multiple possible causes.
View full guide →IntelliChlor Model Specifications
| Model | Max Pool Size | Chlorine Output (24 hr) |
|---|---|---|
IC15 |
15,000 gallons | 0.60 lbs |
IC20 |
20,000 gallons | 0.70 lbs |
IC40 |
40,000 gallons | 1.40 lbs |
IC60 |
60,000 gallons | 2.00 lbs |
Optimal Water Chemistry for IntelliChlor
| Parameter | Ideal Range |
|---|---|
| Salt Level | 3200-3400 ppm |
| Free Chlorine | 2.0-4.0 ppm |
| pH | 7.2-7.6 |
| Alkalinity | 80-120 ppm |
| Calcium Hardness | 200-400 ppm |
| Cyanuric Acid (Stabilizer) | 30-50 ppm |
Routine Maintenance Tips
- Weekly: Test salt and chlorine levels, adjust output as needed
- Monthly: Inspect cell for calcium buildup, clean if necessary
- Seasonally: Have water professionally tested, balance chemistry
- Annually: Check cell blade condition, replace if worn or damaged
When to Call a Professional
Contact a qualified pool technician if:
- LED indicators show problems that persist after troubleshooting
- Cell appears damaged or produces no chlorine despite proper conditions
- Electrical issues are suspected (repeated blown fuses, no power)
- Water chemistry cannot be balanced despite proper adjustments
- Cell is more than 5 years old and performance has declined significantly