One of the 3 valves (injection, backflush and column selector) is not rotating, what should I do?
Concerned instruments: puriFlash 450, puriFlash 4100, puriFlash 4250
Concerned module: Valves
The valve may have seized.
Remove the valve and use isopropanol to free the valve and rotor.
If the problem persists, contact the After-sales service.