Vsd Tuning Screen - York YK-EP Operation And Maintenance Manual

VSD tuning screen

Figure 26: VSD tuning screen
This screen applies to both Variable Speed Drives (VSD) and Medium Voltage Variable Speed Drives
(MVVSD). It displays a cutaway view of the chiller compressor, revealing the Pre-Rotation Vanes.
Animation of the Pre-Rotation Vanes indicates their position. In addition, this screen allows manual
control of the vanes and manual control of the Command Frequency being sent to drive.
Note: Requires a login access level of SERVICE.
Table 65: Display only
Field/LED name
Output Frequency
Pre-Rotation Vanes Position
Delta P/P
Temperature Differential
(LCHLT – Setpoint)
Frequency Control Mode
Command Frequency
% Full Load Amps
76
Description
Displays the frequency at which the drive is operating the motor.
This value is returned from the drive.
Displays the position of the Pre-Rotation Vanes in percent over the
range of 0% (full close) to 100% (full open).
Displays the chiller head pressure calculated as (condenser pressure
- evaporator pressure/evaporator pressure).
Displays the difference between the Leaving Chilled Liquid
Temperature and the Leaving Chilled Liquid Temperature Setpoint.
Displays whether the Command Frequency to the drive is derived
from manual or automatic frequency control mode.
When equipped with a VSD or equipped with a MVVSD, this is the
speed command being sent to the Drive Logic Board in either Auto
or Manual Speed Control mode.
Displays the motor current as a percentage of chiller Full Load
Amps.
YK-EP Style B Centrifugal Chiller