Trying to fix a older hot tub that uses a SPAVISION S1515-UCLB controller. It receptacles on both left and right sides for pump, blower, ozonator.

Does the pump have to start first before anything else will work ???

What is the control scheme for the ozonator ???

What about the blower ?? Does this operate wet and somehow air gets mixed into the water flow ???

Sorry for all the questions, but am new to this.

If the worst happens and I need to replace the controller, what should I buy ????

Eric

don't know the controller but a few general points
the main pump or circ pump must run to filter and heat
the blower is air only - mixes only at the injectors - water in a blower will blow it up
ozonator usually works in conjunction with filter cycles/circ pump operation