JULABO FP51-SL Ultra-Low Refrigerated Circulators - Manual (Page 28)

Safety installations, warning functions
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The following error message appears on the VFD COMFORT-DISPLAY:
Press for help on the LCD 

Depending on the setting of >ControlType - internal or external< the
actual temperature values for both sensors are shown/indicated on
both displays.
Examples: I 94.06 and Ext. : xx.xx°C
Type: >Warning< or >Alarm<
For the two menu items >OverTemp< and >SubTemp< choose
between a warning message being signaled or a complete shutdown
of the main functional elements such as heater and circulating pump
being effected.
OverTemperature: SubTemperature:
If for a sensitive temperature application task adherence to a working
temperature value >Setpoint< is to be supervised, then set high and
low temperature warning values.
In the example below, the >Setpoint< of 85 °C is surrounded by the
values >OverTemp< 87 °C and >SubTemp< 83 °C. The electronics
immediately registers when the actual temperature attains a
temperature out of the limits and it follows a reaction according to
what is set in the menu item >-Type<.
OverTemp 87.0°C
SubTemp 83.0°C
Setpoint3 85.0°C

The warning functions are only triggered when the actual bath
temperature, after start from the „OFF“ or „rOFF“ mode, lies within the
set limits for 3 seconds.