WaterGuru SENSE | "Check Cassette", "Cassette Missing" Alert

If you're getting a "Check Cassette" or "Cassette Missing" Alert in the WaterGuru app, or if the SENSE did not measure any of the chemicals, it indicates an error occurred while reading the chemistry pads in the Cassette due to the following:

• Obstruction in the optical path
• Fine debris in the skimmer that gets inside the Sensor Unit
• The cassette is not seated properly
• Empty Cassette

Follow the steps below to troubleshoot:

1. Remove the SENSE from the skimmer
2. Ensure that the skimmer is clean - without any debris.  If there is debris, clean it out of the skimmer before proceeding.  If your skimmer periodically fills with debris, you will need to check the skimmer occasionally to ensure that there is no debris in the skimmer or the device will stop measuring.
3. If you are using a mesh bag, remove the mesh bag.  The mesh bag is no longer required unless your pool skimmer regularly fills up with a lot of fine particulate matter and you do not clean the pool skimmer regularly.  If you need a mesh bag, one can be ordered from WaterGuru.  
4. Remove the cassette from the SENSE lab unit
5. Check the bottom of the lab unit for any debris.  If there is any debris, remove it.
6. Check the bottom of the cassette for pads(film). If none, please replace the cassette. 
   (If you're using a SENSE S1, you need to reset the Supply Levels after replacing the cassette.)
7. Using a clean cotton cloth dampened with water, wipe the optical window(s) clean. See the images below to determine areas that require cleaning. 
   
   
8. ​​Submerge both the Sensor unit and the cassette in the water, and shake a bit to let the excess air/bubbles out. While submerged, replace the cassette in the sensor unit until you hear a click to ensure it is seated properly. 
9. Replace the SENSE in the skimmer ensuring that the metal strip on the lab unit is pointing toward the pool and not toward the back of the skimmer.
10. Perform a "Measure Now" or wait for the next scheduled reading. 

If you have completed the above troubleshooting, have waited 24 hours, and the WaterGuru App still shows the "Check Cassette" alert, please submit a Support Request.

You can also contact us by phone Monday to Friday from 9:00 am - 6:00 pm PST at 1-844-989-4878.  WaterGuru Support can check your device remotely for further troubleshooting.