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Product Service: Domestic 1-800-522-7658, International 816-333-8811
Chapter 7: Troubleshooting
2. If bubbling is observed around the bulkhead fittings,
access the bottom of the chamber and remove the
insulation. Tighten the appropriate fitting by
placing a wrench on the fitting inside the chamber
and use a second wrench to turn the nut on the
bottom of the chamber. Be careful not to damage
the collector coil or the brazed joints to the
refrigeration system. Once the fitting is tightened,
perform the test again. Should the bubbling still be
present, loosen the bulkhead fittings and apply
vacuum grease to the O-rings, then reassemble and
test.
3. If bubbling was observed on the chamber surface,
the chamber must be replaced. This type of leak
cannot be successfully repaired. The leading cause
of a chamber surface leak is corrosive residue left in
the chamber after use.
Refrigeration Module
Operation
Under a no-load condition, the FreeZone 4.5 Liter
Freeze Dry System can achieve a collector temperature
of –40°C or lower, depending on ambient temperature
and humidity. If the collector temperature does not
reach –40°C within 20 minutes, then the refrigeration
module is not functioning properly.
If any repairs are required on the refrigeration module,
contact you local laboratory supply dealer. If your
laboratory supply dealer is unable to provide assistance,
please call Labconco. Repairs should only be
undertaken by a competent refrigeration technician or
through an authorized Labconco service agency.