Labconco FreeZone 6 Liter Benchtop Freeze Dry Systems 77520 Series - Manual (Page 43)

39
Chapter 7: Troubleshooting
Product Service: Domestic 1-800-522-7658, International 816-333-8811
The following test allows you to check the pump and the
connections from the pump to the vacuum tube.
1. Place a rubber stopper in the vacuum port in the left side of
the collector chamber and another in the drain port in the
bottom.
2. Restart the vacuum system and check your vacuum
indication. Insufficient vacuum indicates a bad pump or a
leak in the connections from the pump to the side of the
chamber.