AEC Glacier Series Air and Water Cooler Portable Chillers - Manual (Page 51)

Page 50 Glacier Series Portable Chillers
OUT or Output LED
This orange LED lights when the control output energizes the hot gas bypass valve.
RMT or Remote LED
This lights when remote operation occurs on chillers equipped with optional communications.
SHIFT LED
This orange LED is not used.
AT or Auto-Tune LED
This orange LED flashes during the Auto-Tune sequence.
ALM1 or Alarm 1 LED
This red LED lights when the process temperature is two degrees [2
°F] or more above the
setpoint. The compressor will turn on and run until the temperature at the To-Process
thermocouple is two degrees below the setpoint. This +2°F control point is factory set for proper
compressor operation. Changing the control point is not recommended without consulting the
AEC/Application Engineering.
ALM2 or Alarm 2 LED
The ALM 2 red LED lights whenever the temperature at the To Process thermocouple drops 2°F
below the process set point.
This red LED lights when the process temperature is two degrees (2
°F) or more below the set
point. The compressor is shut down until the process temperature at the To Process
thermocouple is 2°F above the set point. This control point is factory-set for proper compressor
operation. Changing the control point is not recommended without consulting AEC/Application
Engineering.
6-3 Temperature Controller Keys
Level Key
This key is not used during normal operation. It is used during control programming only.
RMT or Remote Key
This key is on controls with optional communications. For information on RS-232C, RS-422, or
RS-485 communications, refer to the Communications Manual (AEC Part No. A0535959). For
RS-232C units with the SPI CPC protocol converter, see the specific O&I Manual (AEC Part
No. A0536527).