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13
START-UP OF UNIT
Follow the procedures for the initial and consequent operations of the unit.
1. Make sure that all the switches on the control panel, such as the power switch, the battery switch, the
back-up system switch (option) are off.
2. Liquid CO
2
gas cylinder is set at this time.
3. Shut the door and connect the power cable to the power supply after the inner lid is installed.
4. Turn on the power switch and the temperature is displayed on the digital indicator.
5. Set the desired chamber temperature by using the keypads on the control panel. Do not set the
chamber temperature at lower than -90
o
C.
6. Set the temperature at which the back-up system activates according to the procedure on page 30
when the back-up system temperature setting knob corresponds with the desired temperature if the
back-up system is used.
7. Switch on the CO
2
back-up system switch.(option)
8. Check that the alarm lamp lights and the buzzer sounds by pressing the alarm test key.
9. Make sure that liquid CO
2
spouts into the chamber by pushing the back-up test switch.(option)
10. Now you can put articles into the freezer chamber. Switch off the back-up system switch temporarily
when putting in a lot of warm articles. Switch on these switches again after a certain period of operation.
Operation after power failure
The set value is memorized by nonvolatile memory in the event of power failure. Accordingly, the
freezer resumes the operation with setting before power failure.