Variable geometry diffuser screen
Figure 19: Variable geometry diffuser screen
This screen displays information pertinent to the VGD operation.
Table 30: Display only fields
Field/LED name Description
Active Stall Voltage
Displays the Stall Detector output voltage (x.xxVdc), as received by the
Microboard, from the stall board.
Active Stall Voltage
Type
Displays STANDARD or ENHANCED to indicate whether the Active Stall
Voltage has enhanced filtering applied when necessary to normalize flow
noise.
Mach Number
Displays the compressor calculated mach number, based on drive speed
and suction conditions.
VGD Position
Displays the position of the VGD over the range of 0% (fully closed)
to 100% (fully open). Displayed as XXX until calibration procedure is
performed by a qualified service technician.
VGD Command Displays the position command from the control to the VGD.
Surge Detected (LED) Illuminates for 5 seconds each time a surge is detected.
Discharge Pressure
Displays the compressor discharge pressure as sensed by the transducer
used for the stall signal determination.
Condenser Pressure
Displays the condenser pressure sensed by the condenser shell
transducer.
Head Pressure
Displays the resultant of the Condenser Pressure minus the evaporator
pressure.
YMC
2
Mod B with OptiView
™
Control Center
56
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