Hayward CAT 3500 CAT 3500 Owners Manual - Page 27

Store sensors in the soaking caps provided, making sure that each container is filled with the original storage solution or clean water. If the storage containers have been misplaced, store sensors individually in small glass or plastic containers with clean water covering sensor tips. Controller Storage The controller unit is subject to damage by electro-static discharge (ESD) when the sensor cables are disconnected. Always reinstall the BNC protective covers prior to storing or transporting the CAT 3500 controller unit. Winterization The sensors should be prepared for storage as outlined above and protected from freezing temperatures. Although the CAT 3500 controller is designed to withstand a broad temperature range, winter storage in a secure location may be desirable. The flow cell and poly tubing must be drained prior to exposure to freezing temperatures. Either purge all water using compressed air or thoroughly drain through the valve ports and tubing connections. Troubleshooting pH Out Of Range pH is measured on a scale ranging from 0 to 14, with pH 7.0 considered neutral. pH below 7.0 is considered acidic and above 7.0 is alkaline. pH is a significant variable in determining water quality as it affects sanitizer activity, color, and human compatibility with the water. The proper pH range for swimming pools and spas is between 7.2 and 7.8. pH Low A pH below 7.2 will cause corrosive water resulting in possible damage to the filtration components and pool surface as well as bather discomfort. First, test the pool/spa water with a phenol red pH test kit. If the pH on the test kit agrees with the controller and the pH is below 7.2, check the pH correction chemical level. If the manual test does not agree with the controller clean the sensor. pH High A pH above 7.8 will cause scaling on the pool surface, plumbing, and filtration equipment as well as cloudy water, inefficient use of sanitizer and bather discomfort. First, test the pool/spa water with a phenol red pH test kit. If the pH on the test kit agrees with the controller and the pH is above 7.8, check the pH correction chemical level. If the manual test does not agree with the controller clean the sensor. pH Overfeed The pH Overfeed timeout occurs when the CAT 3500 has been feeding chemicals for a time greater than the selected maximum feed time and has not reached its setpoint. A properly selected Overfeed timeout prevents the unit from continuing to feed chemicals when the chemical supply has been diminished or a chemical feeder has become clogged or broken. First, check the chemical supply and chemical feeder. If both are in order, check the Overfeed timeout setting as it may need to be increased to keep up with chemical demand. 26 USE ONLY HAYWARD GENUINE REPLACEMENT PARTS