Labconco FreeZone Triad Freeze Dry System 74000 Series - Manual (Page 32)

Chapter 4: Operating Instructions
Product Service 816-333-8811 or 1-800-522-7658 28
Alarms
A number of events may occur during a lyophilization procedure that can
adversely effect the operation of the Triad Freeze Dry System. If an event
occurs, the alarm indicator will flash and beep.
The beep will automatically mute itself after one minute. The specific alarm
can be identified by observing the display. The following “out of
specification” conditions will initiate an alarm:
Shelf Temperature Variations
Once the shelf temperature has stabilized for 20 minutes, if the manual set
point temperature or automatic hold temperature varies more than ±2°C as
measured by the shelf temperature sensor, the Alarm Indicator and the word
“SHLF” on the display will flash until the end of the run.
Collector Temperature Variations
If the temperature raises above –40°C and stays there for more than 20
minutes the Alarm Indicator and the word “COL” on the display will flash
until the end of the run.
Vacuum
Once the system vacuum is low and stabilized at a point where it changes less
than 0.020 mBar in 5 minutes, if the vacuum changes more than 0.500 mBar,
the Alarm Indicator and the word “VAC” on the display will flash until the
end of the run.
Vacuum Pump Service
When the vacuum pump service hours reaches 1000 hours. The Alarm
Indicator and the VAC Indicator will flash on for 3 seconds and off for 1
second. When the vacuum is turned off the VAC Indicator will flash 1 second
on and 3 seconds off. Resetting the vacuum pump service hours will cancel
the alarm.
Shelf Temperature Set Point
If during a Ramp mode the system temperature stabilizes without reaching
the set point temperature, the control will enter the next Hold mode. The
Alarm Indicator will flash and the program indicator “Px” on the display will
flash until the end of the run.
Power Failure
If a power failure occurs while a run is in progress, the Alarm Indicator and
RUN/STOP Indicator will flash when the power is restored. Once power is
restored, the process will continue as programmed if the collector
temperature has not risen above –30°C. Pressing Run/Stop cancels the
flashing warning.