York YK Style H Operation Manual page 154

If a power failure occurs while the trending is running, the trending is stopped. Upon restoration
of power, the last screen of data that was collected will be displayed on the Trend Screen. The Start
key must be pressed to initiate a new Trend Screen.
Display only
This screen allows the user to view the graphical trending of the selected parameters and is also a
gateway to the graph setup screens.
Note:
• A red screen with the words TREND MAX MUST BE > TREND MIN appears if the Y-axis
minimum has been programmed to a value that is greater than the Y-Axis maximum for
any parameter. If this appears, proceed to the Trend Setup Screen to change the values.
• 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 163: Programmable
V09 software
Button
and earlier
Start Operator
Stop Operator
Print View
Data Select View
Y-Axis View
X-Axis View
Table 164: Navigation
V09 software
Button
and earlier
Home View
History View
Trend Setup View
154
V10 and later
with YORK
Description
Chiller Access
Manager
Pressing this key clears the graph, starts a new graph, sets the time of
day to the present clock time and begins the trending. This key is only
available if trending is stopped. If the selected Chart Type is triggered
Standard
and Trigger Action is set to Start, data collection will not begin until the
triggers have been satisfied and any selected trigger delay has elapsed.
Otherwise, data collection will begin immediately.
Pressing this key stops the trending. The trend data is frozen on the
Standard display until another graph is started with the Start key. The Stop key is
only available if trending is running.
Allows the data on the Trend Screen to be printed in tabular format. If
set to existing, a snapshot of the data presently on the screen is sent to
View the printer. If set to new, all data collected after pressing this key will be
sent to the printer as it is collected. If set to disabled, no data is sent to
the printer. See
Allows the user to display all trended data points simultaneously or select
View a single trended data point for display, hiding the other data points.
Selections are All Data or Data Point X (1-6).
This key toggles the Y-Axis labels of the graph. Each key press changes the
View
label to another of the selected parameters.
This key toggles the X-Axis labels of the graph. Each key press alternates
the scaling between time of day and elapsed time. Time of Day scaling
View
is in 24- hour format. Elapsed Time scaling is the time elapsed since the
Start key was pressed, starting the trending.
V10 and later
with YORK
Description
Chiller Access
Manager
View Returns the user to Home screen.
View Returns the user to History screen.
Only displayed if the trending is stopped. Navigates to a subscreen for
View
configuring the trending display.
Model YK Style H Centrifugal Liquid Chillers with OptiView Control Center
Printing for example.