Labconco FreeZone 6 Liter Benchtop Freeze Dry Systems 77520 Series - Manual (Page 30)

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Chapter 4: Using Your Freeze Dryer
Product Service: Domestic 1-800-522-7658, International 816-333-8811
Line Voltage Out of Range
If the voltage supplied to the Freeze Dryer varies beyond allowable
limits, the alarm will be activated. When an alarm occurs, press
MENU and the display will show:
The alarm will self-cancel when the proper voltage is restored.
The high and low alarm points are preset at the factory to
correspond to the normal allowable voltage variations based on the
nominal voltage specified for the freeze dryer. Some models may
be operated outside the normal voltage limits. See Appendix C.
If necessary, the high and low alarm points may be adjusted for
these models. See Chapter 8.
Temperature Out of Range
An alarm will be activated if the collector temperature rises above
–40°C. If this occurs, the display will show:
Press and hold SELECT for five seconds until the error message is
cleared from the display.
Service Vacuum Pump
The vacuum pump normally plugs into the vacuum pump electrical
receptacle on the back of the Freeze Dryer. When the Freeze
Dryer has accumulated a total of 1000 operating hours, the alarm
indicator will flash. Press MENU to display the alarm:
Press and hold SELECT for five seconds until the error message is
cleared from the display.
This will reset the 1000 hour timer. It may be necessary to service
the vacuum pump more frequently than every 1000 hours
depending on the operation of the Freeze Dryer. The pump oil
should be regularly monitored to verify that it is clean.
LINE VOLTAGE ERROR
COLLECTOR TEMPERATURE
HOLD SELECT TO CLEAR IT
CHANGE VACUUM OIL
HOLD SELECT TO CLEAR IT