MVE Biological Systems
TEC 3000 Operating and Maintenance Freezer Manual
13289499 Rev H •
142
Short cycle fills
Inaccurate level readings
See "Incorrect LN2 level
readings" above.
Insufficient freezer venting
Increase lid gasket vent.
Replace gasket/lid if
necessary
Lid Gasket Replacement
Page 121
Obstruction in level sensing line
Purge level sensing
annular line and clear any
debris in the bottom of
freezer. Complete freezer
thaw and moisture removal
may be necessary
Complete Freezer Thaw and
Moisture Removal
Page 124
High liquid usage
Inaccurate level readings
See "Incorrect LN2 level
readings" above.
Insufficient venting
Increase lid gasket vent.
Replace gasket/lid if
necessary
Lid Gasket Replacement Page
121
Introduction/retrieval of racks or
samples
Liquid usage value should return to normal as more data is
acquired
Lid open for extended period of
time
Inadequate LN2 supply
Verify adequate LN2
supply
Verify Adequate LN2 Supply
Page 115
Obstruction in level sensing line
Purge level sensing
annular line and clear any
debris in the bottom of
freezer. Complete freezer
thaw and moisture removal
may be necessary
Complete Freezer Thaw and
Moisture Removal
Page 124
Consistently high
and increasing
liquid usage
Potential vacuum failure
Contact your authorized MVE Distributor or Technical Service