I have a barefoot spa m class spa pack, gecko topside. My topside control has stop working. when I let it set over night it starts to working again, but now error message Fd00 and 3 dots flashing 4 times.

I have a barefoot spa m class spa pack, gecko topside. My topside control has stop working. when I let it set over night it starts to working again, but now error message Fd00 and 3 dots flashing 4 times.