Hi, I have a jandyystem with aqua link, aqua pure SW system, and jxi heater, circa 2018.
I’m troubleshooting heater issues. One is the High limit fault, which is causing the heater to cycle on and off. I know to replace the limit switches. That is, unless there is a true issue causing a high temperature, which I don’t know how to diagnose.
The other issue is erroneous temp readings. I turned on the heater earlier; in aqua link the water temp showed 70, but the heater display was showing 91. I came back after a while and aqua link showed 88, heater showed 112 with a high water temperature warning. Checked the aqua pure temp from the salt cell and it matched the aqua link readout.
To further diagnose, I took out the jxi water temp sensor, and disconnected the wires from panel to check resistance. Air temp was 68°, as read from the aqua link air sensor, and the heater probe resistance was 12.45k ohms. Based on the charts I found, that should be consistent with 68°. Seems ok I guess
Put it back together and fired up system again. Water temp on jxi, aqua pure, and aqua link more or less match within 1-2° of each other(~80). After a few minutes I got the first high limit fault, but as I mentioned, the heater will cycle back on after a minute.
I noticed again, that as the water temp was rising, with matching indicators from aqua link and aqua pure, the jxi temp was increasingly off on the high side(85 vs 105).
All that said, I plan to replace the limit switches and the temp sensor. Am I missing something? I was also curious how the “remote thermostat enabled” goes into the automation equation. Pool builder told me that the heater uses the remote thermostat, I believe from the aqua link sensor at the pump, as the control. If that’s true, why would the sensor on the jxi have any effect on heater function?
If you made it this far, thanks for taking time to read.
I’m troubleshooting heater issues. One is the High limit fault, which is causing the heater to cycle on and off. I know to replace the limit switches. That is, unless there is a true issue causing a high temperature, which I don’t know how to diagnose.
The other issue is erroneous temp readings. I turned on the heater earlier; in aqua link the water temp showed 70, but the heater display was showing 91. I came back after a while and aqua link showed 88, heater showed 112 with a high water temperature warning. Checked the aqua pure temp from the salt cell and it matched the aqua link readout.
To further diagnose, I took out the jxi water temp sensor, and disconnected the wires from panel to check resistance. Air temp was 68°, as read from the aqua link air sensor, and the heater probe resistance was 12.45k ohms. Based on the charts I found, that should be consistent with 68°. Seems ok I guess
Put it back together and fired up system again. Water temp on jxi, aqua pure, and aqua link more or less match within 1-2° of each other(~80). After a few minutes I got the first high limit fault, but as I mentioned, the heater will cycle back on after a minute.
I noticed again, that as the water temp was rising, with matching indicators from aqua link and aqua pure, the jxi temp was increasingly off on the high side(85 vs 105).
All that said, I plan to replace the limit switches and the temp sensor. Am I missing something? I was also curious how the “remote thermostat enabled” goes into the automation equation. Pool builder told me that the heater uses the remote thermostat, I believe from the aqua link sensor at the pump, as the control. If that’s true, why would the sensor on the jxi have any effect on heater function?
If you made it this far, thanks for taking time to read.
