Variable Geometry Diffuser Screen; Figure 21 - Variable Geometry Diffuser Screen - York YK Series Operation Manuals

FORM 160.54-O1
ISSUE DATE: 9/10/2014

VARIABLE GEOMETRY DIFFUSER SCREEN

FIGURE 21 - VARIABLE GEOMETRY DIFFUSER SCREEN

OVERVIEW
(This feature applies to software version C.MLM.01.10.
xxx (and later) or C.OPT.01.10.302 (and later))
This screen displays information pertinent to the VGD
operation. Also, the VGD can be manually controlled
from this screen.
DISPLAY ONLY
Stall Detector Voltage
Displays the Stall Detector output voltage (x.xxVDC),
as received by the Microboard.
Pre-rotation Vanes Position
Displays the position of the Pre-rotation Vanes over
the range of 0% (fully closed) to 100% (fully open).
Displayed as XXX until calibration procedure is per-
formed by Service Technician.
VGD Closed Limit Switch
(Software version C.OPT.01.23.307 and later)
Displays the status of the VGD Limit Switch. Dis-
played as CLOSED when the switch is closed. This
would be when the VGD is in the fully closed position.
Otherwise, displayed as OPEN.
JOHNSON CONTROLS
SECTION 2 - OPTIVIEW CONTROL CENTER INTRODUCTION
Diffuser Gap Close (LED)
Illuminates when a close signal is being applied to the
VGD.
Diffuser Gap Open (LED)
Illuminates when an open signal is being applied to the
VGD.
Surge Avoidance Surge Detected (LED)
(Software version C.OPT.01.23.307 and later)
Illuminates momentarily when a surge is detected by
the Surge Protection feature. If equipped with a VSD or
MV VSD, these are only the surges detected while the
drive is running at maximum frequency.
If equipped with software version C.OPT.01.22.307
or earlier, this is displayed as Surge Detected. It illu-
minates momentarily when a surge is detected by the
Surge Protection feature, regardless of the VSD operat-
ing speed.
ACC Surge Detected (LED)
(Software version C.OPT.01.23.307 and later)
Only displayed if equipped with a VSD (in Modbus
Protocol Configuration) or MV VSD. Illuminates mo-
mentarily when a surge is detected by the ACC func-
LD15427
69
2