I have APA0003 trisensor for my autopilot nano. It’s reading no flow and thus not running the salt cell. I am getting temp and salt readings. There is definitely water flow, so before spending $250 for a new one, I’m hoping there’s some troubleshooting I can do with a multimeter.
Testing a Trisensor for flow with multimeter?
- Thread starter piefightclub
- Start date
- Dec 13, 2020
- 914
- Pool Size
- 19600
- Surface
- Plaster
- Chlorine
- Salt Water Generator
- SWG Type
- Jandy Aquapure 1400
Don't know for sure, but looked at the manual. The flow sensor is just a switch. If it's working, then 2 of socket pins should go from infinite to near-zero ohms when you flex the metal blade so the magnet touches the stalk.
No way to tell which 2 unless you can find a service manual somewhere. But you won't do any damage by trying all pairs.
You might also try to reverse engineer which pins are which. It looks like there are 6. Seems reasonable that there are 2 for each sensor. If so, then this ought to work: 1) look for 2 that connect (1 for each) to the salt sensing blades (don't scratch them) with low ohms. 2) Look for another two that have maybe 10-20 K ohm resistance between them. Those would be the temp sensor. Verify by dunking in cold water to see the resistance change. If you can rule out those 4, the other 2 must be the flow switch.
No way to tell which 2 unless you can find a service manual somewhere. But you won't do any damage by trying all pairs.
You might also try to reverse engineer which pins are which. It looks like there are 6. Seems reasonable that there are 2 for each sensor. If so, then this ought to work: 1) look for 2 that connect (1 for each) to the salt sensing blades (don't scratch them) with low ohms. 2) Look for another two that have maybe 10-20 K ohm resistance between them. Those would be the temp sensor. Verify by dunking in cold water to see the resistance change. If you can rule out those 4, the other 2 must be the flow switch.
laprjns
LifeTime Supporter
- Aug 14, 2012
- 612
- Pool Size
- 30000
- Surface
- Vinyl
- Chlorine
- Salt Water Generator
- SWG Type
- Pureline Crystal Pure 60,000