17
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.
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
Table 8 — Compressor Run Status
UNIT
STATUS
VALUE DESCRIPTION
OFF 0 The unit is OFF.
DELAY 1
The unit is ON but a time delay is counting
down.
READY 2
The unit is ready to run and waiting for a
startup command.
RECYCLE 3
The unit is ON but not running because it has
satisfied the setpoint.
PRESTART 4
The unit is about to start.
It is performing pre-
start checks.
STARTUP 5 The unit is starting.
AUTORESTART 6
Auto restart is enabled and the unit has just
powered up and will be restarting.
RUNNING 7 The unit is running normally.
DEMAND 8
The unit is running normally but the capacity is
being limited by the demand limit setpoint.
RAMPING 9
The unit is running normally but the capacity is
being limited by the ramp loading ramp rate.
STOPPIN
G 10 The unit is stopping.
TRIPOUT 11 The unit has been stopped due to an alarm.
SERVICE
TEST
12
The unit is in service test mode.
PUMPDOWN 13
The pumpdown mode has been initiated, and
pumpdown process has started.
LOCKOUT 14
The pumpdown process has completed and
switched to LOCKOUT, or the unit has been
manually set to LOCKOUT from the service
menu.
RESET 15
The reset button has been pressed and the
unit is reset
ting alarms.
LAB TEST 16 The unit is in lab test mode.
Table 9 — Pre-Start Alerts and Alarms
PRE-START ALERT CONDITION STATE NO.
ALARM
OR
ALERT
Condenser Flow not detected during flow verification time 401 Alert
Evaporator Flow not detected during flow verification time 402 Alert
Number of recycle restarts in the last 4 hours is greater than 5 403 Alert
Invalid Control Program 404 Alert
(TP only) Economizer EXV prestart check failure 405 Alert
(TP only) EXV prestart check failure 407 Alert
Condenser pressure greater than config limit (default 130 psig) 409 Alert
Discharge temperature greater than config limit (default 200°F) 411 Alert
Line Voltage greater than its high limit 413 Alert
Any motor winding temp during prestart>= 190°F (87.8°C) 415 Alert
Invalid Compressor Envelope 417 Alert
Line Voltage is below its low limit 419 Alert
Oil sump temp is below 140°F (77.8°C) AND Oil sump temp < Evap Sat Temp + 15°F (8.3°C) 421 Alert
Evaporator liquid temp is below Freeze Setpoint or if applicable Brine Freeze Setpoint
(Configuration, Service Configuration=34°F default)
423 Alert
Evaporator saturated temp is below Brine Freeze Setpoint
(Configuration, Service Configuration=34°F default)
425 Alert
Oil Delta P greater than 6 psig prior to startup 429 Alert
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)
401 Alarm
Starts in 12 hours exceed Starts Per Period value configured in Service Configuration (default 6) 431 Alert
Inverter temp high limit exceeded 433 Alert
Rectifier temp high limit exceeded 435 Alert
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