A little more information:
I turned off the power again, took off the front panel and checked all of the wiring
inside for tightness, reinstalled everything, and checked the tightness of the remote
valve for freshwater flushing
that is on top of the carbon filter housing. Then I turned the power back on. Several diagnostic screens flashed so fast I couldn’t get photos of all of them. Finally, the same message as above came on the screen. About ten minutes later, I checked again and there was a new message that said, “To clear flush filter count, press reset.” Then it changed to “Press Reset to clear HP pump oil
= @D /500.” Then it changed back to the message about resetting the flush filter count.
I pressed and released the Reset button 40 times with about three seconds between each press. No change. Then I pressed and held the Reset button for about one minute. Again, no change.
It seems to be stuck on wanting the counters reset but they won’t reset. I haven’t been able to find a way to “reboot” it or restore it to factory default. I’m at a loss.