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3.1
Getting Started
Plug the power cord into an appropriate power supply. The green Power On light will
illuminate. Turn the System On switch to the On position. The control unit will beep. If
the control unit has not been switched on for some time, the alarm may sound to indicate
that the battery is low. In this case, the alarm will continue to sound until the battery has
been charged or replaced with a fully charged battery. See Section 4.5.
The Temperature Warning light should illuminate, indicating the temperature in the
freezer is higher (warmer) than the temperature set on the backup unit.
3.1.1
Testing Gas Flow & Door Switch Operation
1. Make sure the freezer door/lid is closed and that the LN
The freezer should be OFF.
2. With the control unit switched on, and the LN
Open light should illuminate, indicating gas injection.
3. Carefully open the door/lid 5 cm (about 2 inches); the gas supplied through
the injector should switch off. The gas injection should never occur while the
door/lid is open.
4. Open the door/lid fully and confirm that gas has been flowing by determining
the presence of frozen condensation around the injector and on the freezer's
shelf.
5. With the freezer door nearly closed (about 2 inches/5 cm open), push the
Valve Test button. The Valve Open light should not illuminate and LN
should not be injected into the freezer.
WARNING!
If LN
is ever injected while the freezer door is open, close the door
2
immediately and readjust the magnetic door sensor (see section 2.2.6).
If the problem continues, contact a service representative.
M1288-0056
LN
Backup Units for Innova & Premium Freezers
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supply is turned on.
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supply turned on, the Valve
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User's Guide
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