Float sensor trouble

[siskiou]

Asking here, just in case someone has a quick answer:

Profilux II Plus
Control v. 5.1.5.4

I've been using a setup with two sensors, for automatic top-off and automatic waterchanges.
Two days ago, the sensor regulating the auto top-off started activating every few minutes, and go off again after a few seconds, even though it should have been off (water level was getting higher than sensor should have allowed.

Thinking that the sensor had gone bad, I took it offline, and switched the second sensor into its position.
Tested it and it seemed to work fine. But the same thing happened with that sensor during the night.

I almost can't believe that two sensors would go bad with the same odd symptom. Coming on, and shutting off continuously.

I wonder, what could cause this.

The sensor activates a solenoid to the RO/DI.

Can anyone help me out with some troubleshooting ideas?
My Profilux has been super reliable up till now. The two sensors are on a GHL splitter.

Noticed that under "sensor state" the X is blinking a lot, even if water level is fine (is this normal?). I have it set to 10s delay.

In diagnostic mode, the "1" for this sensor goes out when the x blinks.

Does this sound like a sensor problem (both are mechanical) or a controller problem?

 

[doggydoc]

Sometimes sensors can be" falsely" triggered when there is vibration from a pump. I had a sensor go "bad" on me 6 months ago or so. It was inside my skimmer collection cup. I had it set to 1 second. Ended up buying a new sensor and the problem continue. I even switched sensor numbers and still had the same issue. Was about to throw the towel on it and leave it alone. I ended up increasing the reaction time to 30 seconds and so far no issue at all.

 

[siskiou]

Thanks!
I'll give that a try. Strange that it would work for ages with 10s delay, and then go crazy with nothing changed.

For now, I'm also running it on a timer, so I don't wake up to a flood. Letting it be active twice a day, for 4 minutes.
But I think that the timer setting will mess up my water changes, or do I see that wrong?

 

[Vinny@GHLUSA]

Increasing the reaction time should be enough to stop the sensor from constantly turning on and off.

With that timer setting, sensor will only run for 4 minutes which means that the WC only has 4 minutes to operate.