Thermo Scientific Forma 8600 Series User Manual page 46

Section 6
Factory Installed Options
BUS Control Panel
Power - indicates the unit has AC power.
(continued)
Low Battery - battery charge is low. The battery needs replaced or
recharged.
Solenoid Engaged - BUS has opened the solenoid so it can inject gas (CO
2
or LN ).
2
Press-To-Test - Activates the solenoid and injects LN or CO into the
2 2
freezer chamber as long as the button is depressed. The solenoid engaged
indicator should light. If the Low Battery indicator lights during the test,
replace the BUS battery.
s
Note The solenoid will not engage if lid is open.
Caution The back-up system is designed to inject CO
or LN . In the
2 2
unlikely event of back-up system failure, the back-up system will activate
and allow CO or LN to flow until stopped manually or is manually shut
2 2
s
off.
Configure Optional Back Up
The optional BUS can be configured for LN or CO supply. Section 3 -
2 2
Configuration contains instructions for setting the BUS type.
System (BUS)
Set Optional BUS Set
The optional back up system is designed to inject CO2 or LN2 into the
freezer compartment if the temperature rises above back up system set
Point
point. To set the BUS set point:
1. Press the Mode key until the Settings indicator lights.
2. Press right arrow until "BACKUP = -XX" displays in message center.
3. Press up or down arrow key until desired BUS set point is displayed.
4. Press Enter to save the setting.
5. Press the Mode key until the Run indicator lights, or press the right or
left arrow to go to the next or previous parameter.
If no control keys are pressed, the freezer will automatically return to
RUN mode after 5 minutes.
Thermo Scientific 8600 Series 6-5