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NRS CANTAR GLOW BUOY FLOATING POOL LIGHT 92000 - Page 9 Questions & Answers
Clearwater chlorinator c140 no flow light is on but water is flowing
Clearwater chlorinator c170 no flow light is on but water is flowing Recently had this issue with my chlorinator, red light was on indicating no water flow but everything was working fine, filters clean, normal flow of water in the pool, pH, salt levels all good.According to the troubleshooting instructions the only option was to replace the PCB but the PCB was working just fine.I wanted to test the PCB so I've got a glass of tap water with a pinch of table salt and inserted the sensor cable all the way on the bottom, then I've touched the water with the black cable connector that goes to the chlorinating cell .The negative potential is transmitted trough the salty water in the cell from the black (-) connector to the sensor cable and to the transistor that detects (opens) when the gap between the negative plates and the sensor wire is bridged by water.So, the positive cable I left attached to the chlorinating cell and the negative and the sensor wire in a glass of water with a pinch of salt. The red light immediately went off and the green and yellow light came on.Green is OK power supply and yellow is the low salt light that came on because the flow of current between the connector and the sensor wire was low due to the small surface area of both.I've reconnected all the cables and powered on the system again and the problem was still there.The only possible culprit was obviously the cell itself. The advice was to replace it.But everything was fine with the connections of the titanium plates and all. Tested all the connections with a multimeter and all was fine .The "sensor" is just a screw so it couldn't be causing all the trouble, right ?Well , wrong ! The titanium screw , in time, has got coated with a layer of oxide I suppose and that was isolating the screw . But why did it show good connection when tested with the multimeter ? I suppose the probe punched a hole on the oxide layer but the surface was too small to trigger the transistor to show the water flow.So, small wire brush and brushed the living hell out of that screw. Install everything back , check all connections and power on.It works as new . I lost a half day figuring it all out but it was worth it.I hope it would help anyone who might be in the same ridiculous situation .
2/10/2022 4:02:31 AM •
Pool & Spa
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Answered
on Feb 10, 2022
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