Labconco FreeZone 76700 Series, User Manual

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Chapter 4: Using Your Freeze Dryer
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automatically restart. 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