Operation
8 Installation and Operation Manual
Thermo Scientific Cryogenic Storage Freezers
6 Operation
6.1 Control Panel
Features
Figure 1.
Control Panel with Optional Backup System
Before the initial start up, take some time to become familiar with the
controls on your freezer. Figure 1 illustrates the Thermo Scientific
Cryogenic Freezer control panel.
Note:
Figure 1 shows all possible functions. These functions vary depending on
the options. You may not have all of the functions on your equipment. The LN
2
Backup System lights (21, 22, 23) represent status indicators for a built-in LN
2
backup system, which is optional.
1. Three position keyed Power On Switch.
2. Power On Indicator. This indicator lights when power is connected to
the freezer.
3. Temperature Failure Indicator. This indicator lights when the freezer
temperature deviates either above or below the alarm temperature
settings.
4. Power Failure Indicator. This indicator lights when there is a power
failure to the freezer.
5. Life-Guard Alert Indicator. This indicator lights when the first stage
compressor has gone into a cautionary state of operation to help prevent
failure.
off
life-guard alert
extreme ambient alert
clean filter
power failure
temperature failure
alarm test alarm reset
cabinet
temperature
control
set point
alarm
battery low
voltage
warm alarm
set point
cold alarm
set point
power on
alarm on
set point security
1
15
7
9
10
11
SUPPLY
ON
SUPPLY
EMPTY
BACKUP SYSTEM
BATTERY
LOW
8
23
6
12
13
21
20
22
14
18
19
17
16
2
5
4
3
check
fuse
boost
