14
5.8.
PRIOR TO OPERATION
Plug-in the instrument to correctly grounded sockets.
Insert the key to the power switch lock at the rear panel.
Power the freezer on by rotating the key clockwise.
Observe that the microprocessor control system is activated.
Learn the function of the control panel (See Section 5.7.)
The freezer starts automatically according to the last set temperature. You should set the
temperature value according to your need (See Section 6.1.).
When freezer starts to operate, the temperature of the chamber will appear on the control
panel and audible and visual alarm will be activated. Push alarm mute key (F2) to mute the
audible alarm. Temperature of chamber appears on the control panel during cooling
process.
FR series freezers will reach -41°C
approximately in
3 hours if the chamber is not
loaded. (This period depends on the ambient temperature.)
6.
OPERATING PRINCIPLES
6.1.
PROGRAMMING
At most 70% of the surface area of the shelves should be loaded in order to obtain a
uniform temperature distribution.
The temperature alarm range can be adjusted between 5
C and 10
C. Red colored
screen meaning warning will be displayed when freezer is operated for the first time
and audible alarm will be activated. Push the alarm mute key (F2) to mute the audible
alarm. The red screen turns into the blue when temperature in the chamber is in the
temperature alarm range.
6.1.1.
OPERATING MODE
When the freezer is powered on, it starts to
operate automatically according to the last set
values. The screen on the left is operating mode
screen.
Set
temperature
and
chamber
temperature values appear in this screen. Current
time and date are shown at the top line. “
” will
appear and flash on this screen when the freezer
starts cooling process.
