LNP95 is extremely noisy
If the LNP95 makes a very loud noise when pumping, it is possible that the transit screws have not been removed from the transit position.
The LNP95 is shipped with 4 screws in the base of the unit to hold the vacuum pumps in place during shipping to prevent damage to the unit. If these screws are not removed before use, the pumps effectively have no vibration damping and the system will be extremely noisy. Remove the four screws from the base of the unit and store them in the provided holes on the back panel of the LNP95, as shown below:
Make sure to replace the transit screws in the base of the unit before shipping the LNP95.