AEC WD 350 through WD3000 Dehumidifying Dryers - Manual (Page 26)

350-2100 cfm Dryers Chapter 4: Control Panel 25 of 58
4-5 Temperature Controller LED Indicators
Process Value Numeric LED
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.
Set Value Numeric LED
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.
Output LED
This orange LED lights when the control output energizes the process air heater.
Remote LED
This lights when remote operation occurs on dryers equipped with optional communications.
Shift LED
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.
Auto-Tune LED
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.
Alarm One LED - High Temp Alarm
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.
Alarm Two LED - Low Temp Alarm
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.