Compressor Run Status; Chiller Start-Up Sequence - Carrier AquaEdge 23XRV Controls Operation And Troubleshooting

either Modbus, BACnet, or CCN, and must be enabled on the
Configure Startup Options screen.

Compressor Run Status

Compressor run status is shown at the top of the system over-
view (home) screen. Table 8 lists chiller status names, values,
and descriptions.
Table 8 — Compressor Run Status
UNIT
VALUE
STATUS
OFF 0 The unit is OFF.
The unit is ON but a time delay is counting
DELAY 1
down.
The unit is ready to run and waiting for a
READY 2
startup command.
The unit is ON but not running because it has
RECYCLE 3
satisfied the setpoint.
The unit is about to start. It is performing pre-
PRESTART 4
start checks.
STARTUP 5 The unit is starting.
Auto restart is enabled and the unit has just
AUTORESTART 6
powered up and will be restarting.
RUNNING 7 The unit is running normally.
The unit is running normally but the capacity is
DEMAND 8
being limited by the demand limit setpoint.
The unit is running normally but the capacity is
RAMPING 9
being limited by the ramp loading ramp rate.
STOPPING 10 The unit is stopping.
TRIPOUT 11 The unit has been stopped due to an alarm.
SERVICE The unit is in service test mode.
12
TEST
The pumpdown mode has been initiated, and
PUMPDOWN 13
pumpdown process has started.
The pumpdown process has completed and
switched to LOCKOUT, or the unit has been
LOCKOUT 14
manually set to LOCKOUT from the service
menu.
The reset button has been pressed and the
RESET 15
unit is resetting alarms.
LAB TEST 16 The unit is in lab test mode.
Condenser Flow not detected during flow verification time
Evaporator Flow not detected during flow verification time
Number of recycle restarts in the last 4 hours is greater than 5
Invalid Control Program
(TP only) Economizer EXV prestart check failure
(TP only) EXV prestart check failure
Condenser pressure greater than config limit (default 130 psig)
Discharge temperature greater than config limit (default 200°F)
Line Voltage greater than its high limit
Any motor winding temp during prestart>= 190°F (87.8°C)
Invalid Compressor Envelope
Line Voltage is below its low limit
Oil sump temp is below 140°F (77.8°C) AND Oil sump temp < Evap Sat Temp + 15°F (8.3°C)
Evaporator liquid temp is below Freeze Setpoint or if applicable Brine Freeze Setpoint
(Configuration, Service Configuration=34°F default)
Evaporator saturated temp is below Brine Freeze Setpoint
(Configuration, Service Configuration=34°F default)
Oil Delta P greater than 6 psig prior to startup
Low Oil Pressure at Startup. Occurs if oil pressure < 18 psig (124.1 kPa) and oil pump on for Oil Pressure Verification Time
(default 60s)
Starts in 12 hours exceed Starts Per Period value configured in Service Configuration (default 6)
Inverter temp high limit exceeded
Rectifier temp high limit exceeded
DESCRIPTION
Table 9 — Pre-Start Alerts and Alarms
PRE-START ALERT CONDITION

Chiller Start-Up Sequence

PRE-START CHECK
Once start-up begins, the controller performs a series of pre-start
tests to verify that all pre-start alerts and safeties are within lim-
its. Progress is shown on the Startup Sequence screen (see
Fig. 33). This screen can be accessed by touching the mode title
(top blue bar) of the home screen. Table 9 lists pre-start alert and
alarm conditions.
The compressor RUN STATUS parameter on the default screen
line now reads PRESTART. If a test is not successful, the start-
up is delayed or aborted. If all tests are successful, the chilled
water pump relay energizes, and the main screen line now reads
STARTUP.
Fig. 33 — Start-Up Sequence Screen
17
ALARM
STATE NO. OR
ALERT
Alert
401
Alert
402
403 Alert
Alert
404
405 Alert
407 Alert
409 Alert
411 Alert
413 Alert
415 Alert
Alert
417
419 Alert
421 Alert
423 Alert
425 Alert
429 Alert
401 Alarm
431 Alert
433 Alert
435 Alert