York YK-EP Operation And Maintenance Manual page 120

Table 119: Display only
Field/LED name
Mapping Inhibited (LED)
ACC Surge Detected (LED)
Speed Decrease Inhibit –
Surge Map Point (LED)
Temperature Differential
(LCHLT – Setpoint)
Output Frequency
Pre-Rotation Vanes Position
Delta P/P
Table 120: Programmable
Button
Map View
Manual Surge Point
Remove Surge Point
Table 121: Navigation
Button Access level
Home Service
VSD Service
ACC Details Service
120
Description
Illuminates while the Microboard ACC function is not permitted to
map points or reduce speed due to unstable Leaving Chilled Liquid
Temperature, manual speed control, current limit in effect (chiller
FLA only) or during Soft Shutdown. Otherwise, it is extinguished.
Illuminates momentarily when a surge is detected by the ACC
function in the Microboard, while the drive is running at less than
maximum frequency.
Illuminates when the Microboard ACC function is not permitted
to reduce speed due to a mapped surge point. Otherwise, it is
extinguished.
Displays the difference between the Leaving Chilled Liquid
Temperature and the Leaving Chilled Liquid Temperature Setpoint.
Selected: Displays the drive output frequency of the selected surge
point.
Present: Displays the present drive output frequency.
Selected: Displays the PRV position of the selected surge point.
Present: Displays the present PRV position.
Selected: Displays the Delta P/P of the selected surge point.
Present: Displays the present Delta P/P.
Description
Allows a Service Technician to change the view from table to list.
Allows the Service Technician to manually log the present running
conditions into the surge map as a valid surge point. When this key
is pressed, a dialog bog appears requesting a special password to
proceed.
Allows the Service Technician to remove a mapped surge point.
When this key is pressed, a dialog box appears requesting a special
password to proceed. The surge point is selected by placing the
green box over the desired point. Then the REMOVE SURGE POINT
key is pressed to remove it.
Description
Returns user to HOME Screen.
Returns user to VSD Screen.
Returns user to ACC Screen.
YK-EP Style B Centrifugal Chiller