Set Low Temperature Alarm; Set High Temperature Alarm - Thermo Scientific HERAfreeze HFU Series Operating And Maintenance Manual

Section 1
Installation and Start-up
Set High Temperature
Set Low Temperature
1-12 HFC Series
The high temperature alarm activates an audible/visual warning when the
freezer chamber temp reaches or exceeds the high temp alarm set point.
Alarm
To set the high temperature alarm set point:
1. Press the Mode key until the Set indicator lights.
2. Press right arrow until "HI ALM = -XX" displays in message center.
3. Press the up or down arrow key until the desired high temperature
alarm 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.
Note The high alarm set point must be set at least 5°C from the control
set point.
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Note At initial start-up, the high temperature alarm is disabled until the
cabinet reaches set point or 12 hours elapse.
The low temperature alarm activates an audible/visual warning when the
freezer chamber temp reaches or decreases below low temp alarm set point.
Alarm
To set the low temperature alarm set point:
1. Press the Mode key until the Settings indicator lights.
2. Press right arrow until "LO ALM = -XX" displays in message center.
3. Press the up or down arrow key until the desired low temperature
alarm 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.
Note The low alarm set point must be set at least 5°C from the control set
point.
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