York YK Style H Operation Manual page 94

Table 87: Display only fields
Field/LED name
Mapping Inhibited (LED)
Surge Avoidance Surge Detected
(LED)
ACC Surge Detected (LED)
ACC Surge Count
Surge Map Point Count
Surge Detection State
Note: For fields requiring access level of SERVICE. Service Technicians refer to the OptiView
Control Center - Service Instructions (Form 160.76-M1) for operation instructions and explanation
of all programmable setpoints and displayed values.
Table 88: Programmable
Button
VSD Start Frequency
Mapping Enable
Surge Margin Adjust
Surge Sensitivity
Surge Map Clear
Surge Map Print
Table 89: Navigation
V09 software
Button
and earlier
Home View
Capacity
View
Control
Surge Map Service
94
Description
Illuminates when 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 Surge Protection feature.
This feature only detects surges that occur while the drive is running at maximum
frequency.
Illuminates momentarily when a surge is detected by the ACC function in the
Microboard, while the drive is running at less than maximum frequency.
Increments when a surge is detected while the drive is running at less than maximum
frequency.
Displays the total number of data points contained in the surge map.
Display the current Surge Detection State. Inactive, Startup Wait, Evaluating Conditions
or Surge Detected.
Description
Sets the starting frequency from which the ramp-up will begin. Programmable over
the following range:
• 0 Hz to 210 Hz (default 45 Hz)
Sets the Delta T (Leaving Chilled Liquid Temperature - Setpoint) needed to be met to
enable surge mapping and speed reduction initially on startup. Programmable over
the range of 0.5°F to 20.0°F (default 5.0°F).
This value determines how close the frequency reduction will be allowed to get to
the surge line. Programmable over the range of 0.0 (default) to 25.0 Hz. Service
Technicians should refer to Variable Speed Drive – Service Instructions (Form 160.00-M4)
prior to adjusting this setpoint.
Allows the Service Technician to adjust the sensitivity of the ACC Surge Detection in
the Microboard (surges that occur while the drive is running at less than maximum
frequency). Programmable over the range of 0.1 to 20.0 with default of 2.5. Smaller
values increase the sensitivity.
Allows the Service Technician to clear the surge map. When this key is pressed, a
dialog box appears requesting a special password to proceed.
Allows the Service Technician to print the entire surge map to a connected printer, as
shown in Printing of this manual.
V10 and later
with YORK
Description
Chiller Access
Manager
View Returns the user to Home Screen.
View Navigates to the Capacity Control Screen.
JCI Service Causes a jump to the subscreen that displays the surge map.
Model YK Style H Centrifugal Liquid Chillers with OptiView Control Center