I agree with JamesW, the original mainboard is an HP and was replaced with an RJ r1.47. The Firmware label on the board clearly says r1.47. The problem is that some segments in the LCD are missing which makes it read like r1.17. You may notice that a dash (-) line is missing in AL 7 when it should read AL-7. If you are savvy, you can attempt dismantling the display LCD and clean the contacts bridging the LCD and the pcb.
For the Aquatrol, Hayward recommends a vertical installation. But there's no mention of the Aquarite even though the T-cells are the same across the board.
The built-in analog timer on the Aquatrol when ON sends instructions to the micro-controller to do 2 things:
1. Energize the relay K3 which then carries the 120VAC to the pump. This circuit is unsupervised and the controller does not know whether the pump is running or not.
2. Activate the power to the cell which can be monitored through the diagnostics.
On a side note, ignore the flow switch. The RJ firmware does not support the functionality of a flow switch.
The main issue here is, the replacement cell is telling that you overshoot the salt level in your water. Follow the previous recommendations. Get a reliable salt test kit, do a partial drain and refill.