York YK Style H Operation Manual page 68

Table 50: Display only fields
Field/LED name
Stall Time
VGD Control State
VGD Actuator Mode
[VGD] Open (Manual)
[VGD] Close (Manual)
[VGD] Hold (Manual)
[VGD] Auto
[Pressures] Discharge
[Pressures] Condenser
[Pressures] Head
Table 51: Programmable
V09 software
Button
and earlier
VGD Start
Service
Position
Table 52: Navigation
V09 software
Button
and earlier
Home View
Compressor View
Setpoints Service
VGD Calibrate Service
68
Description
Displays the accumulated time the Stall Detector Board output voltage is greater than
the High Limit Setpoint while the chiller is running.
Displays the current state of the VGD control. The states are: Stall Waiting, Probing,
Stall Reacting, Surge Reacting, Surge Waiting, Hot Gas Hold, Hot Gas Over­ride, Sensor
Failure Override, Extreme Stall Override, Manual Hold, Manual Open, Manual Close.
Displays Manual when either the VGD Open or Close manual buttons are pressed at
Service level. Displays Auto when the Auto key is pressed to return to automatic VGD
position control.
This key puts the VGD in manual mode and sends an OPEN command to the VGD.
This key puts the VGD in manual mode and sends a CLOSE command to the VGD.
This key puts the VGD in manual mode and sends a hold command to the VGD.
This key puts the VGD into automatic control mode.
Display the compressor discharge pressure.
Display the condenser pressure.
Display the head pressure (cond press - evap press/ evap press).
V10 and later
with YORK
Description
Chiller Access
Manager
Adjustable 0.0% to 100.0%; Default 0.0%
JCI Service
Allows the user to set the starting position to help prevent stall during
start up when extremely low loads or high head conditions are present.
V10 and later
with YORK
Description
Chiller Access
Manager
View Returns the user to Home Screen.
View Returns the user to Compressor Screen.
Navigates to the subscreen that allows programming of the Variable
JCI Service
Geometry Diffuser setpoints.
Navigates to the subscreen that allows calibration of the Variable
JCI Service
Geometry Diffuser feedback potentiometer.
Model YK Style H Centrifugal Liquid Chillers with OptiView Control Center