Carrier PC211 specifications MAINT01 MAINT02 MAINT03 MAINT04

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

MAINT02

MAINT03

MAINT04

(PSIO Software

Version 09 and

Higher)

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 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.

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.