I have an IC-40 SWG with a Intelliflo 4x160. Normal operating RPM is 1700, which gives me a turn or so a day on my 24,000 g pool. A recent anomaly has popped up. My low flow indicator light is coming on the IC-40, in turn stopping any clorine production. The only way to get the low flow light to go back to normal is to manually increase the RPM. When I increase the RPM, it resolves the issue for maybe a few hours to a day, but the low flow light will always come on.
I removed the IC-40, and it is free from obstructions, in fact after a year of use, it is still looking like new inside. I have backwashed the filter, and it may work fine for 24-48 hrs and then go back to low flow, even though the PSI change has only gone from 8psi to 10psi. I have been running the pool for a year at this 1700rpm without issue until the past two weeks.
Does anyone have any suggestions or experience with this type of issue?