Technical data

This error message is displayed if the program fails to perform two
successful pressure increase measurements in a row at the end of
a section. The section is extended.
Code 22
Note: dT Freezing/Drying
Producttemp.1 ist out of limit at section end.
See also chapter 5.5.7 “Delta t freezing/drying”
Code 24
Maintenance interval reached. Perform maintenance
or contact local service.
See also section 5.7.5 “Maintenance of the freeze dryer”
Code 25
Shelf temperature has not been reached at section
end.
Only in the programmer module! This message is displayed if the
shelf temperature differs in an inadmissible way from the set value
for the shelf temperature at the end of a section.
Code 26
Program finished.
Only in the programmer module! The program run has been
completed.
Code 29
Maintenance of the vaccum pump is necessary.
Please maintenance the vacuum pump and reset the
working hour meter.
It is possible to set a maintenance interval for the vacuum pump
under OPTIONS Æ Misc. Æ Vacuum Pump (see “Options”).
The message is displayed in the process and equipment
information system when maintenance is due. The message has
to be confirmed. You should now perform the required
maintenance and then reset the operating hour counter under
OPTIONS Æ Misc. Æ Vacuum Pump.
Code 43
Water in ice condenser chamber
There is still water in the ice condenser chamber.
Operating Manual Freeze Dryer ALPHA 1-4 LSC / ALPHA 2-4 LSC LSC Control System • 65