Freeze-dryer Alpha 1-4 LDplus
Freeze-dryer Alpha 2-4 LDplus
7 Malfunctions and error correction
Version 11/2006, Rev. 2.2 of 17/10/2016 • sb
Translation of the original operating manual
Fig. 45: Small flange and centring ring
Fig. 46: Small flange with centring ring
and small flange
Fig. 47: Attaching the clamping ring
Fig. 48: Tightened clamping ring
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7.1.2.2 Aeration and media drain valve
A malfunction of the aeration and media drain valve may have several
causes. One potential source are contaminants such as product residues
within the valve.
• Switch the freeze-dryer off and disconnect the mains plug.
• Clean the valve (see chapter 8.1.1.2 - "Aeration valve, media drain
valve").
• Put the freeze-dryer into operation again.
If there is still a leakage, the freeze-dryer must be checked by qualified
specialist personnel (see chapter 7.3 - "Service contact").
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