Carrier 17/19EX - Manual (Page 263)

Control Algorithms Checkout Procedure
In the LID Service menu, one of the tables is Control Algorithm Status. This table contains 6
tables that may be viewed in order to see how the particular control algorithm is operating.
These maintenance tables are very useful in determining guide vane position, reaction from
load changes, control point overrides, hot gas bypass reaction, surge prevention, etc.
MAINT01
MAINT02
MAINT03
MAINT04
OCCDEFM
WSMDEFME
Capacity Control
Override Status
Surge/HGBP
Status
LEAD/LAG Status
Time Schedules
Status
Water System
Manager Status
This table shows all values that are used to calculate the
chilled water/brine control point.
Details of all chilled water control override values are
viewed here.
The surge and hot gas bypass control algorithm status is
viewed from this screen. All values dealing with this con-
trol are displayed.
This screen indicates LEAD/LAG operation status.
The Local and CCN occupied schedules are displayed
here in a manner that allows the operator to quickly
determine whether the schedule is in the OCCUPIED
mode or not.
The water system manager is a CCN module which can
turn on the chiller and change the chilled water control
point. This screen indicates the status of this system.