Emerson Liebert iCOM, Manual

Page: 139 / 172

Service Menu Parameters
131 Liebert
®
iCOM
®
for Liebert DSE
™
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 LWD Value (Liebert HPM
™
only)—Displays percent leakage from 0-100% on units with the
optional analog Leakage Water Detector.
S374 Status LSI (Liebert HPM and Liebert PeX
™
only)—Shows the status of the high water level
indicator on units with variable capacity steam bottle humidifiers.
S375 Status Condenser 2 Failure (Liebert HPM only)—Shows the status of the Condenser 2
failure indicator.
Figure 108 Diagnostics/service mode screen, page 8 of 8
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.