Creating a Redundancy system of the LPV_pump_pipe in simulink.

I want to create a redundancy system based on the LPV_pump_pipe here:

Fault Diagnosis of Centrifugal Pumps Using Residual Analysis - MATLAB & Simulink (mathworks.com)

I want to basically have the faulty signal come through and after it is analyzed it switches to the original LPV_pump_pipe parameters. After I got this step working I was going to put a fault sensor into the test portion of the LPV_pump_pipe. I don't think the switch is working properly I am having trouble figuring out how to configure it because it is letting both signals pass through. I am probably going to struggle through to figure out how to implement a fault sensor but one step at a time.

Here is the code is linked at the top