Labconco FreeZone and FreeZone Plus 6, 12 and 18 Liter Freeze Dry Systems 79600 Series - Manual (Page 38)

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Chapter 4: Using Your Freeze Dryer
Product Service: Domestic 1-800-522-7658, International 816-333- 8811
If the failure is of a short duration and the collector does not warm
up excessively, when power is restored, the Freeze Dryer will
restart and resume operation of the refrigeration and vacuum
systems. If the power failure lasts for a longer duration and the
collector warms above safe limits, when the power is restored, the
Freeze Dryer will not restart by itself. This prevents melted
sample from being drawn into the collector and prevents liquid
from being sucked into the vacuum pump. When power is
restored, the alarm indicator will flash and the alarm beeper will
sound. When the MENU button is pressed the display will show
Press and hold SELECT for five seconds until the error message is
cleared from the display.
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.
POWER FAIL
HOLD SELECT TO CLEAR IT
LINE VOLTAGE ERROR
COLLECTOR TEMPERATURE
HOLD SELECT TO CLEAR IT