Carrier 19XR Start-Up, Operation And Maintenance Instructions

These maintenance screens are very useful in helping to
determine how the control temperature is calculated and guide
vane positioned and for observing the reactions from load
changes, control point overrides, hot gas bypass, surge pre-
vention, etc. The tables are:
CAPACITY Capacity
Control
This table shows all values
used to calculate the chilled
water/brine control point.
OVERRIDE Override
Status
Details of all chilled water con-
trol override values.
HEAT_EX Surge/
HGBP
Status
The surge and hot gas bypass
control algorithm status is
viewed from this screen. All
values dealing with this control
are displayed.
LL_MAINT LEAD/LAG
Status
Indicates LEAD/LAG operation
status.
OCCDEFCM Time
Schedules
Status
The Local and CCN occupied
schedules are displayed here
to help the operator quickly de-
termine whether the schedule
is in the 9occupied9 mode or
not.
WSMDEFME Water
System
Manager
Status
The water system manager is a
CCN module that can turn on
the chiller and change the
chilled water control point. This
screen indicates the status of
this system.
Control Test — The Control Test feature can check all
the thermistor temperature sensors, pressure transducers, pumps
and their associated flow devices, the guide vane actuator,
and other control outputs such as hot gas bypass. The tests
can help to determine whether a switch is defective or a pump
relay is not operating, as well as other useful troubleshoot-
ing issues. During pumpdown operations, the pumps are en-
ergized to prevent freeze-up and the vessel pressures and
temperatures are displayed. The Pumpdown/Lockout fea-
ture prevents compressor start-up when there is no refrig-
erant in the chiller or if the vessels are isolated. The Termi-
nate Lockout feature ends the Pumpdown/Lockout after the
pumpdown procedure is reversed and refrigerant is added.
LEGEND TO TABLES 8A - 8J
CCM — Chiller Control Module
CVC — Chiller Visual Control
CHW — Chilled Water
ISM — Integrated Starter Module
PIC II — Product Integrated Control II
VFD — Variable Frequency Drive
Table 8 — CVC Primary and Secondary Messages and
Custom Alarm/Alert Messages with Troubleshooting Guides
A. MANUAL STOP
PRIMARY MESSAGE SECONDARY MESSAGE PROBABLE CAUSE/REMEDY
MANUALLY STOPPED — PRESS CCN OR LOCAL TO START PIC II in OFF mode, press CCN or LOCAL softkey to start unit.
TERMINATE PUMPDOWN MODE TO SELECT CCN OR LOCAL Enter the CONTROL TEST table and select TERMINATE LOCKOUT to
unlock compressor.
SHUTDOWN IN PROGRESS COMPRESSOR UNLOADING Chiller unloading before shutdown due to soft/stop feature.
SHUTDOWN IN PROGRESS COMPRESSOR DEENERGIZED Chiller compressor is being commanded to stop. Water pumps are
deenergized within one minute.
ICE BUILD OPERATION COMPLETE Chiller shutdown from Ice Build operation.
B. READY TO START
PRIMARY MESSAGE SECONDARY MESSAGE PROBABLE CAUSE/REMEDY
READY TO START IN XX MIN UNOCCUPIED MODE Time schedule for PIC II is unoccupied. Chillers will start only when
occupied.
READY TO START IN XX MIN REMOTE CONTACTS OPEN Remote contacts are open. Close contacts to start.
READY TO START IN XX MIN STOP COMMAND IN EFFECT Chiller START/STOP on MAINSTAT manually forced to stop. Release
point to start.
READY TO START IN XX MIN OCCUPIED MODE Chiller timer counting down. Unit ready to start.
READY TO START IN XX MIN REMOTE CONTACTS CLOSED Chiller timer counting down. Unit ready to start. Remote contact enabled
and closed.
READY TO START IN XX MIN START COMMAND IN EFFECT Chiller START/STOP on MAINSTAT manually forced to start. Release
value to start under normal control.
READY TO START IN XX MIN RECYCLE RESTART PENDING Chiller in recycle mode.
READY TO START UNOCCUPIED MODE Time schedule for PIC II is unoccupied. Chiller will start when occupied.
Make sure the time and date are correct. Change values in TIME AND
DATE screen.
READY TO START REMOTE CONTACTS OPEN Remote contacts have stopped the chiller. Close contacts to start.
READY TO START STOP COMMAND IN EFFECT Chiller START/STOP on MAINSTAT manually forced to stop. Release
point to start.
READY TO START OCCUPIED MODE Chiller timers complete, unit start will commence.
READY TO START REMOTE CONTACTS CLOSED Chiller timer counting down. Unit ready for start.
READY TO START START COMMAND IN EFFECT Chiller START/STOP on MAINSTAT has been manually forced to start.
Chiller will start regardless of time schedule or remote contact status.
STARTUP INHIBITED LOADSHED IN EFFECT CCN loadshed module commanding chiller top stop.
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Carrier 19XR Specifications

General

Brand	Carrier
Model	19XR
Category	Chiller
Language	English