Pre-Rotation Vanes calibration screen
Figure 25: Pre-Rotation Vanes calibration screen
This screen displays a cutaway view of the chiller compressor, revealing the Pre-Rotation Vanes and
provides the capability of calibrating the Pre-Rotation Vanes for either Variable Speed Drive or Hot
Gas Bypass applications.
Note: Requires a login access level of SERVICE.
Table 62: Display only
Field/LED name Description
Pre-Rotation Vanes Opening
(LED)
Indicates the vanes are opening.
Pre-Rotation Vanes Closing
(LED)
Indicates the vanes are closing.
Calibration in Progress
(LED)
Indicates the calibration sequence is in progress.
Calibration Messages
These are text messages which step the user through the calibration
process and indicate its success or failure.
Pre-Rotation Vanes Voltage
Displays the Pre-Rotation Vanes position potentiometer feedback
voltage.
Table 63: Programmable
Button Access level Description
Start
Calibration
Service This option is hidden after calibration has started.
Cancel
Calibration
Service This option only becomes available after calibration has started.
YK-EP Style B Centrifugal Chiller74