Emerson Liebert iCOM Manual De Usuario

S370 Status DT3 (Room/Setpoint)—Indicates if the delta T between room return air temperature 

and unit air temperature setpoint has been met.
S371 Status DT4—Indicates the status of the Economizers ability to operate when looking at 

outdoor air, humidity and wet bulb. (Wet bulb applicable only on DX units).
S372 Status Min CW—Indicates if the free-cooling or chilled water temperature is below the 

minimum chilled water setpoint.
S373 through S376—Not applicable to Liebert North America units.

S379 Valve Control—Controls the 3P valve(s). Control can be by either of two methods:

• A time-driven signal that uses a 3P valve’s travel time and the time that an open or closed output 

is provided to a 3P valve to estimate its current position.

• A feedback signal from the valve that is required for Supply Air Control. The feedback signal 

constantly provides the Liebert iCOM with the valve’s position, eliminating the need to reset the 

valve(s) on a loss of power and provides a valve failure detection.

S380 Start Valve Calibration—Changing this value to YES starts the valve calibration procedure 

of the 3P Actuator. The unit must be powered down on the I/O key before calibration can be 

preformed. During this procedure, the valve is positioned to a fully closed and fully opened state while 

the feedback signal is monitored. The control then automatically saves the feedback signal voltage at 

the two end points as its calibration reference during normal operation.
S381 Calibration Status—Shows whether the calibration has been started: idle indicates 

calibration has not begun; ongoing indicates calibration has begun. When calibration has been 

completed, the status will return to idle.
S382 V1: 0% open = —Feedback voltage recorded when the valve is positioned at 0% during the 

calibration.
S383 V1: 100% open = —Feedback voltage recorded when the valve is positioned at 100% during the 

calibration.
S384 Current V1 Feedback—The valve’s current feedback voltage. This value changes as the valve 

strokes to different open positions.
S385 V2: 0% open = —For an optional secondary valve; operates the same as the V1.
S386 V2: 100% open = —For an optional secondary valve; operates the same as the V1.
S387 Current V2 Feedback—For an optional secondary valve; operates the same as the V1.

Set Alarms allows the user to view and modify critical alarm thresholds, time delays, enable/disable 

alarms, modify event types and program custom alarm inputs.