Carefully remove the sample tray from the vacuum chamber and remove the processed sample. Close the chamber door. Troubleshooting I am unable to make the pumping system vent or pump down. If the button for the operation you are trying to select is not illuminated, it is not available at this time. This will usually make pumping and venting options available.
Press reset on the pumping system controller.
The cryo-pump has overheated. Do not press reset. The pump can probably recover without regeneration and regeneration will take several hours. The shutter will not operate. If it is, release it.