Aquarite display reads 9900, only power light on


What are the diagnostic readings?
 
How do I get the PCB to go into diagnostic mode? I can only toggle through the general areas on the display board. I've gotten to the AL-5 and tried moving the switch from auto to super and back several times but nothing happens.
 
If it's stuck on AL-5, I don't know how to fix that.

You can see if Hayward will tell you.

If they won't, you will probably have to replace the circuit board.

How old is the box?
 
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