G4204A quat pump Error messages –Drive off and –Outlet valve block position

HI, I have a G4204A quat pump which displays the error “Drive off” and “Outlet valve block position” in LabAdvisor. Please can anyone tell me what this means and how I might be able to fix it. We don’t have much money (academia!) and would like to fix it without calling out an engineer if possible. Thanks

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