Sterling 350-2100 CFM User Manual

350-2100 cfm Dryers 

Chapter 4: Control Panel 

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During normal operation, this red LED on the control displays the process temperature at the 
"To Process" thermocouple. It also lists parameters during setup and error messages if an 
error occurs. 

During normal operation, this green LED on the control displays the process set point you 
want the dryer to maintain. It also displays parameter and pre-set function values during 
setup. 

This orange LED lights when the control output energizes the process air heater.  

This lights when remote operation occurs on dryers equipped with optional communications. 

This orange LED lights if the optional Shift Set switch is closed. The process temperature 
will be changed by the amount set in the 

 value in the Level 1 parameters. To shift to a 

lower value, be sure to enter a negative value. 

This orange LED flashes during the Auto-Tune sequence. The controller will automatically 
determine the proper P.I.D. values for the operating conditions. See Section 6-11. 

This lights when the process air temperature has risen more than 25°F [factory default] from 
the setpoint. The alarm relay in the PLC is energized when this LED is lit.The audible/visual 
alarm will sound if the dryer is so-equipped. All heaters turn off and the blowers stay on to 
cool the heaters. It is adjustable - see Section 5-5.  

This lights when the process air temperature drops more than 25°F [factory default] from the 
setpoint. The alarm relay in the PLC is energized when this LED is out. The audible/visual 
alarm will sound if the dryer is so-equipped. It is adjustable - see Section 5-5.