Part number 20068, Rev 0
8
Programming Mode
Note: The programming mode gives access to several functions that are
not intended for user adjustment. The procedures below provide
direction to the functions that you can adjust. Please do not attempt to
change any of the other functions in the programming area or your unit
may be damaged or become unstable.
Locking and Unlocking the Control
The control keys can be locked out to prevent inadvertent operation.
To lock the control keys, simultaneously press and hold the up arrow and the down
arrow. The display will show “POF”. At this point you can only use keys to view the SET
temp and the minimum and maximum stored temperatures.
To unlock the control keys, simultaneously press and hold the up arrow and the down
arrow. The display will show “Pon”. The control keys are now unlocked and you can
perform the programming functions below.
Adjusting the temperature control set points:
NOTE: The temperature control set points are preset at the factory to
provide the desired air and product temperatures inside of the unit and
require no further adjustment. Please contact the manufacturer’s
Technical Service Department before making any adjustments to
determine if adjustment is necessary and, if so, to make sure it is
performed properly.
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To set the compressor off set point, press and hold the SET key for 2 seconds. The current
value will be displayed and the C or F icon will flash. Use the up or down keys to change the
value. Press SET again to lock in the value.
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To set the compressor on set point, you will need to adjust the differential, or Hysteresis
setting. This is the number of degrees the controller will allow temperature to drift up until
it restarts the compressor. For example, if the SET point is 3 degrees Celsius and the
