Cvc Operation And Menus; General; Alarms And Alerts; Cvc Menu Items - Carrier 19XR Start-Up, Operation And Maintenance Instructions Manual

CVC Operation and Menus (Fig. 12-18)

GENERAL

• The CVC display automatically reverts to the default screen
after 15 minutes if no softkey activity takes place and if
the chiller is not in the pumpdown mode (Fig. 12).
• If a screen other than the default screen is displayed on the
CVC, the name of that screen is in the upper right corner
(Fig. 13).
• The CVC may be set to display either English or SI units.
Use the CVC configuration screen (accessed from the Serv-
ice menu) to change the units. See the Service Operation
section, page 43.
• Local Operation — The PIC II can be placed in local
operating mode by pressing the LOCAL softkey. The
PIC II then accepts commands from the CVC only and
uses the Local Time Schedule to determine chiller start
and stop times.
• CCN Operation — The PIC II can be placed in the CCN
operating mode by pressing the
PIC II then accepts modifications from any CCN interface
or module (with the proper authority), as well as from the
CVC. The PIC II uses the CCN time schedule to deter-
mine start and stop times.
ALARMS AND ALERTS — An alarm shuts down the com-
pressor. An alert does not shut down the compressor, but it
notifies the operator that an unusual condition has occurred.
An alarm (*) or alert (!) is indicated on the STATUS screens
on the far right field of the CVC display screen.
Alarms are indicated when the control center alarm light
(!) flashes. The primary alarm message is displayed on the
default screen. An additional, secondary message and
troubleshooting information are sent to the ALARM HIS-
TORY table.
When an alarm is detected, the CVC 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 infor-
mation. Once all alarms have been cleared (by pressing the
RESET softkey), the default CVC screen will return to nor-
mal operation.
CVC MENU ITEMS — To perform any of the operations
described below, the PIC II must be powered up and have
successfully completed its self test. The self test takes place
automatically, after power-up.
Press the MENU softkey to view the list of menu struc-
tures: STATUS , SCHEDULE ,
SERVICE .
• The STATUS menu allows viewing and limited calibra-
tion or modification of control points and sensors, relays
and contacts, and the options board.
• The SCHEDULE menu allows viewing and modification
of the local and CCN time schedules and Ice Build time
schedules.
• The SETPOINT menu allows set point adjustments, such
as the entering chilled water and leaving chilled water set
points.
CCN softkey. The
SETPOINT , and
14
PRIMARY STATUS
MESSAGE
SECONDARY
STATUS
MESSAGE
ALARM LIGHT
(ILLUMINATED
WHEN POWER ON)
•
BLINKS CONTINUOUSLY
ON FOR AN ALARM
•
BLINKS ONCE TO
CONFIRM A STOP
STOP BUTTON
•
HOLD FOR ONE
SECOND TO STOP
SOFT KEYS
Fig. 12 — CVC Default Screen
19XR_II
ALARM HISTORY
CONTROL TEST
CONTROL ALGORITHM STATUS
EQUIPMENT CONFIGURATION
ISM (STARTER) CONFIGURATION DATA
EQUIPMENT SERVICE
TIME AND DATE
ATTACH TO NETWORK DEVICE
LOG OUT OF DEVICE
CVC CONFIGURATION
Fig. 13 — CVC Service Screen
• The SERVICE menu can be used to view or modify
information on the Alarm History, Control Test, Control
Algorithm Status, Equipment Configuration, ISM Starter
Configuration data, Equipment Service, Time and Date, At-
tach to Network Device, Log Out of Network Device, and
CVC Configuration screens.
For more information on the menu structures, refer to
Fig. 15.
Press the softkey that corresponds to the menu structure
to be viewed : STATUS , SCHEDULE , SETPOINT , or
SERVICE . To view or change parameters within any of
these menu structures, use the NEXT and PREVIOUS soft-
keys to scroll down to the desired item or table. Use the
SELECT softkey to select that item. The softkey choices
that then appear depend on the selected table or menu. The
softkey choices and their functions are described below.
BASIC CVC OPERATIONS (Using the Softkeys) — To per-
form any of the operations described below, the PIC II must
be powered up and have successfully completed its self test.
COMPRESSOR DATE
ONTIME
RUNNING TEMP CONTROL
01-01-95 11:48
LEAVING CHILLED WATER
28.8 HOURS
CHW IN CHW OUT EVAP REF
55.1 44.1 40.7
CDW IN CDW OUT COND REF
85.0 95.0 98.1
OIL PRESS OIL TEMP AMPS %
21.8 132.9 93
CCN LOCAL RESET MENU
EACH KEY'S FUNCTION IS
DEFINED BY THE MENU DESCRIPTION
ON MENU LINE ABOVE
SERVICE
TIME
MENU
LINE