Good morning, thanks for the add.
I have a 2008 Catalina Premium 800CD (UK version of the Quebec) which has semi-died. The top panel appears to be responding correctly in that the display is fine, Mode settings changes appear to be saved, the pump/blower/lights buttons show and hide their yellow lights when pressed, and the fast-flicker heater activation light is working. The commands however are not being actioned, i.e. both pumps, the blower, the lights and the heater do not operate.
I've cut power for 12 hours and restarted but to no avail. I've also tested all fuses which are good, and power (240v) is getting to the board.
I have plenty auto-electrical and domestic appliance experience although not hot tubs, and suspect the board. Is there anything else to check on the basis of what I've reported? Any and all help will be much appreciated. Thanks.