Observation
There is no flow of liquid through the filter.
Explanation
1) The filter is clogged by impurities and/or water.
2) The container is not pressurized. Follow the instruction manual carefully. It is important not to release the pressure during the filling process. The operation of the device is based on a passive and physical principle, and internal pressure builds upon insertion of the tube into the tank as the materials cool down provided that the top is sealed off by the rubber handle.
Fix
1) Replace the filter using a normal wrench. At the same time we advise to clean the storage container: empty it completely before refilling. Use a vacuum cleaner for 20 – 30 min. to create air circulation in the empty tank to dry out water from melting ice crystals (the hose should be positioned approx. half ways into the tank).
2) Insert the “warm” tube fully into the tank. Immediately press the rubber handle firmly against the dewar neck while holding the treatment unit under the filter. Liquid nitogen will flow instantly. Keep pressing the rubber handle – do not release the pressure until the CryoPro unit is full.
Remove the withdrawal tube when finished to let it warm up before next use.
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