York 160.87-OM1, Руководство по эксплуатации и обслуживанию

Страница: 120 / 268

Table 119: Display only
Field/LED name Description
Mapping Inhibited (LED)
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.
ACC Surge Detected (LED)
Illuminates momentarily when a surge is detected by the ACC
function in the Microboard, while the drive is running at less than
maximum frequency.
Speed Decrease Inhibit –
Surge Map Point (LED)
Illuminates when the Microboard ACC function is not permitted
to reduce speed due to a mapped surge point. Otherwise, it is
extinguished.
Temperature Differential
(LCHLT – Setpoint)
Displays the difference between the Leaving Chilled Liquid
Temperature and the Leaving Chilled Liquid Temperature Setpoint.
Output Frequency
Selected: Displays the drive output frequency of the selected surge
point.
Present: Displays the present drive output frequency.
Pre-Rotation Vanes Position
Selected: Displays the PRV position of the selected surge point.
Present: Displays the present PRV position.
Delta P/P
Selected: Displays the Delta P/P of the selected surge point.
Present: Displays the present Delta P/P.
Table 120: Programmable
Button Description
Map View Allows a Service Technician to change the view from table to list.
Manual Surge Point
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.
Remove Surge Point
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.
Table 121: Navigation
Button Access level Description
Home Service Returns user to HOME Screen.
VSD Service Returns user to VSD Screen.
ACC Details Service Returns user to ACC Screen.
YK-EP Style B Centrifugal Chiller 120