Thermo Scientific CRYO Plus 1 Operating And Maintenance Manual page 19

Section 2
Operation
2-2 7007400 Cryoplus
The elements on the left side of the control panel illuminate when fault
conditions occur, providing information about the alarm state. Refer to
Section 3 of this manual.
A three element alarm bar illuminates during an alarm condition to
visually alert the operator. The Silence button is used to silence the audible
alarm. Refer to the alarm descriptions and corrective actions in Section 3
of this manual.
Other elements of the control panel are:
• A seven segment numeric display that shows the chamber temperature
directly under the lid when the keyswitch is in the Lock position.
When the key is in the Programming Access (.) position, the display
shows the High Temperature Alarm set point.
• The Enter button is used to send programming changes to the
microprocessor.
• Up and down arrows that change the high and low level settings when
making programming changes, are also used to change the high
temperature alarm setpoints.
• The High Level button changes the level at which the system stops
filling.
• Low Level is pressed to change the level at which the system starts
filling.
• The High Temp button changes the temperature at which the high
temperature alarm activates.
• Press Manual Fill to manually fill the tank. The level must be at least
1-1/4 inches below the high level setpoint to start a manual fill.
• Fill Valve Open light indicates that the fill valve is open.
• The key switch is used to allow program changes when the key is in
the (.) Programming Access position and to protect the system from
tampering or accidental button presses when the key is in the Lock
position.
• If the lid is opened frequently, condensation can occur on the vent
port, causing icing of the port. See the maintenance section for defrost
information.
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