Carrier 19XL specifications LID Operation and Menus Fig, General, Select

LID Operation and Menus (Fig. 13-19)

GENERAL

·The LID display will automatically revert to the default screen after 15 minutes if no softkey activity takes place and if the chiller is not in the Pumpdown mode (Fig. 13).

·When not in the default screen, the upper right-hand cor- ner of the LID always displays the name of the screen that you have entered (Fig. 14).

·The LID may be con®gured in English or SI units, through the LID con®guration screen.

·Local Operation Ð By pressing the LOCAL softkey, the

PIC is now in the LOCAL operation mode. The control will accept changes to set points and con®gurations from the LID only. The PIC will use the Local Time Schedule to determine chiller start and stop times.

·CCN Operation Ð By pressing the CCN softkey, the PIC

is now in the CCN operation mode, and the control will accept modi®cations from any CCN interface or module (with the proper authority), as well as the LID. The PIC will use the CCN time schedule to determine start and stop times.

Fig. 13 Ð LID Default Screen

ALARMS AND ALERTS Ð Alarm (*) and alert (!) status are indicated on the Status tables. An alarm (*) will shut down the compressor. An alert (!) noti®es the operator that an un- usual condition has occurred. The chiller will continue to operate when an alert is shown.

Alarms are indicated when the control center alarm light

(!)¯ashes. The primary alarm message is viewed on the de- fault screen and an additional, secondary, message and troubleshooting information are sent to the Alarm History table.

When an alarm is detected, the LID default screen will freeze (stop updating) at the time of alarm. The freeze en- ables the operator to view the chiller conditions at the time of alarm. The Status tables will show the updated informa- tion. Once all alarms have been cleared (by pressing the

RESET softkey), the default LID screen will return to nor-

mal operation.

MENU STRUCTURE Ð To perform any of the operations described below, the PIC must be powered up and have suc- cessfully completed its self test. The self test takes place automatically, after power-up.

·Press QUIT to leave the selected decision or ®eld with- out saving any changes.

·Press ENTER to leave the selected decision or ®eld and save changes.

·Press NEXT to scroll the cursor bar down in order to

highlight a point or to view more points below the current screen.

·Press PREVIOUS to scroll the cursor bar up in order to highlight a point or to view points above the current screen.

· Press

SELECT

to view the next screen level (high-

lighted with the cursor bar), or to override (if allowable) the highlighted point value.

Fig. 14 Ð LID Service Screen

14