Sterling Power Products 30F to 65F 5-4Temperature Controller Keys, Rmt Led, At Led, SUB1 LED

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 AT 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.

Page 28 SMC Series Chillers