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Page 28 SMC Series Chillers
RMT LED
The orange RMT LED is lit during remote operation.
AT LED
The orange AT LED flashes during auto-tuning.
SUB1 LED
The orange SUB1 LED energizes whenever the process temperature is two
degrees (2°F/ºC) or more below the To Process set point. The compressor then
shuts down by means of a latching circuit, and does not run again until the
temperature at the To Process thermocouple is two degrees (2°F/ºC) above the
set point.
This +2°F/ºC control set point is factory-set for proper compressor operation.
Changing it is not recommended without consulting the Stelring Service
Department.
5-4 Temperature Controller Keys
AT
AT Key
Press and hold the
A
T
AT key for two seconds to initiate or stop
the auto-tune function.
Display Key
The functions of the Display key change, based on how
long you press it. Press the Display key for less than one (1)
second to scroll through parameters within the mode.
Press the Display key for at least one (1) second or more to display
the menu; this function also lets you select the mode you need to
adjust.