QCA Dream Series, Mystic SPA. Drained, cleaned and re-filled. Following power restore (and 5 min or so prime cycle), the the pump runs continuously at low speed - it NEVER stops. Everything else works fine - no error codes displayed.

I was just wondering if anyone knows how much water the QCA Majestic Spa holds ???? It doesn't tell you in the directions!

The dr error code is for "dry". Meaning that the control system is not sensing that water is flowing through the heating element.

With a new spa, and you just having drained it , it is probably an air locked pump.
What this means is that you have a small constant circulation pump with not much power, that got ait trapped in it when you drained. When you went to start back up, this "air lock" prevented the pump from fully priming.
Power down the spa at the breaker. Remove the filter element.Stick a garden hose with lots of pressure into the skimmer hole and open the hose valve to let water inject into the skimmer.
Restore power to the spa and check operation.
If after attempting this a few times you still get the code, there is an issue with your flowswitch, or with your circulation pump.
With a brand new spa, id like to hope that you just have an air lock.

Good luck

This probably means the the circulation pump is failing. It sounds like the temp sensor is good, but the high limit sensor is either bad or really reading a high limit. This is very typical of a small undersized circulation pump that is starting to fail.

If you have drained the spa latly and refilled you could have an air lock keeping the heater dry. Simpley find the drain valve under the spa and open it till it run's water. This should help the problem by letting the pressure even in the pipeing and flooding. Good luck.

You probally have an air lock. All you need to do is find the drain valve and open it long enough to get water running full. This will flood the pipes and the spa should start. Good luck.

FL could be a code for low flow. If you have no circulation this sounds like it. If your pump runs and you have no flow you could have a problem with your pump. Or if you have the tub drained then it could be an air lock, if you open the drain valve till you get water out that should fix that. Also check to be sure the isolation valves are open under the spa. I hope this helps.

Is your spa wired for 110Volt or 220V?

FL is usually a flow sensor/switch fault. If you have just filled the tub, the pump may not be properly primed. The best thing is to fill the tub through the skimmer when you first start filling it, that ensures the pump is filled with water and is not air locked. You may have to force water into the skimmer to push the air out of the line or loosen a union on the discharge side of the pump to get it primed. FL will not let heater run because it thinks that there is no flow.

Its an error code for insufficient flow. Try cleaning your filter(s) and turn off the breaker for 5 min. If that does not fix it, you may have a bad flow switch. Hope this helps.

Open your drain valve under the unit to break any air lock that will have gotten there when you drained the tub.