Control Algorithms Checkout Procedure - Carrier PC211 Start-Up, Operation And Maintenance Instructions Manual

Control Algorithms Checkout Procedure

In the LID Service menu, one of the tables is Control Algorithm Status. This table contains 4
maintenance tables which may be viewed in order to see how the particular control algorithm is
operating. The 4 tables are:
MAINT01 Capacity Control
Override Status
MAINT02
MAINT03 Surge/HGBP
Status
LEAD/LAG
MAINT04
(PSIO Software Status
Version 09 and
Higher)
OCCDEFM Time Schedules
Status
WSMDEFME Water System
Manager Status
These maintenance tables are very useful in determining how the control temperature is
calculated, guide vane position, reaction from load changes, control point overrides, hot gas
bypass reaction, surge prevention, etc.
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 control
are displayed.
This screen indicates LEAD/LAG operation status.
The Local and CCN occupied schedules are displayed here
in a manner that the operator can 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.