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15
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 remote alarm
switch, the back-up system switch (AT type only) are off.
2. Liquid CO
2
gas cylinder for AT type 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 supply 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 20
when the temperature display pointer of temperature recorder corresponds with the desired temperature
if the back-up system is used. (AT type only)
7. Switch on the remote alarm switch and CO2 back-up switch (AT type only).
8. Check that the alarm lamp lights and the buzzer sound by pressing the alarm test key.
9. Make sure that liquid CO
2
spouts into the chamber by pushing the CO2 back-up test switch.
10. Now you can put articles into the freezer chamber. Switch off the remote alarm switch and the CO2
back-up switch (AT type only) 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.