Cvc Operation And Menus; General; Alarms And Alerts; Cvc Menu Items - Carrier 23xl Start-Up, Operation And Maintenance Instructions Manual

CVC Operation and Menus (Fig. 17-23)

GENERAL

• The CVC display automatically reverts to the default
screen after 15 minutes if no softkey activity takes place
(Fig. 17).
• 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. 18).
• The CVC may be set to display either English or SI
units. Use the CVC configuration screen (accessed from
the Service menu) to change the units. See the Service
Operation section, page 46.
• Local Operation — The PIC II can be placed in local
operating mode by pressing 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
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 no-
tifies 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 HISTORY table.
When an alarm is detected, the CVC default screen will
freeze (stop updating) at the time of alarm. The freeze enables
the operator to view the chiller conditions at the time of alarm.
The STATUS tables will show the updated information. Once
all alarms have been cleared (by pressing the
key), the default CVC screen will return to normal operation.
CVC MENU ITEMS — To perform any of the operations
described below, the PIC II must be powered up and have suc-
cessfully completed its self test. The self test takes place auto-
matically, 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 modifica-
tion 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.
softkey. The
LOCAL
softkey. The PIC
CCN
soft-
RESET
, , and
SETPOINT
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
Fig. 17 — CVC Default Screen
23XL_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. 18 — 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, Attach to Network Device, Log Out of Net-
work Device, and CVC Configuration screens.
For more information on the menu structures, refer to
Fig. 20.
Press the softkey that corresponds to the menu structure to
be viewed: STATUS ,
. To view or change parameters within any of
SERVICE
these menu structures, use the
keys to scroll to the desired item or table. Use the
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) —
perform any of the operations described below, the PIC II must
be powered up and have successfully completed its self test.
19
COMPRESSOR DATE
ON TIME
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
SOFT KEYS
EACH KEY'S FUNCTION IS
DEFINED BY THE MENU DESCRIPTION
ON MENU LINE ABOVE
SERVICE
SCHEDULE , SETPOINT
and
NEXT PREVIOUS
SELECT
TIME
MENU
LINE
, or
soft-
To