Specifications

103
Table 17 — ICVC Primary and Secondary Messages and
Custom Alarm/Alert Messages with Troubleshooting Guides (cont)
E. START-UP IN PROGRESS
F. N O R M A L RU N
PRIMARY MESSAGE SECONDARY MESSAGE CAUSE/REMEDY
STARTUP IN PROGRESS OCCUPIED MODE Chiller is starting. Time schedule is Occupied (OCCUPIED? = YES)
STARTUP IN PROGRESS
REMOTE CONTACT CLOSED Chiller is starting. REMOTE CONTACTS OPTION is set to ENABLE. Remote
start contact input on ISM terminals J2-5 and J2-6 is closed.
STARTUP IN PROGRESS
START COMMAND IN EFFECT Chiller is starting. Chiller START/STOP in MAINSTAT is manually forced to
START.
AUTORESTART IN
PROGRESS
OCCUPIED MODE Chiller is starting after power failure. Time schedule is Occupied (OCCU-
PIED? = YES).
AUTORESTART IN
PROGRESS
REMOTE CONTACT CLOSED Chiller is starting after power failure. REMOTE CONTACTS OPTION is set to
ENABLE. Remote start contact input on ISM terminals J2-5 and J2-6 is
closed.
AUTORESTART IN
PROGRESS
START COMMAND IN EFFECT Chiller is starting after power failure. Chiller START/STOP on MAINSTAT
screen is manually forced to START.
PRIMARY MESSAGE SECONDARY MESSAGE CAUSE/REMEDY
RUNNING — RESET ACTIVE
BY 4-20 mA SIGNAL Auto chilled water reset active based on external input. ENABLE RESET TYPE
=1. A non-zero temperature reset based on a 4-20 mA Auto Chilled Water Reset
signal on CCM J5-3 and J5-4 is being added to the SETPOINT to determine the
CONTROL POINT. See TEMP_CTL screen
RUNNING — RESET ACTIVE
REMOTE TEMP SENSOR Auto chilled water reset active based on external input. ENABLE RESET TYPE
=2. A non-zero temperature reset based on the Remote Temperature Reset sen-
sor signal on CCM J4-13 and J4-14 is being added to the SETPOINT to determine
the CONTROL POINT. See TEMP_CTL screen
RUNNING — RESET ACTIVE
CHW TEMP DIFFERENCE Auto chilled water reset active based on cooler chilled water temperature differ-
ence. ENABLE RESET TYPE =3. A non-zero temperature reset based on the dif-
ference between the ENTERING CHILLED WATER and LEAVING CHILLED
WATER is being added to the SETPOINT to determine the CONTROL POINT.
See TEMP_CTL screen.
RUNNING — TEMP CONTROL
LEAVING CHILLED WATER Default method of temperature control. ECW CONTROL OPTION = DSABLE.
Chiller capacity is being controlled so the LEAVING CHILLED WATER tempera-
ture is being maintained within 1/2 of the CHILLED WATER DEADBAND on either
side of the CONTROL POINT. See TEMP_CTL screen
RUNNING — TEMP CONTROL
ENTERING CHILLED WATER Entering Chilled Water (ECW) control enabled. ECW CONTROL OPTION =
ENABLE. Chiller capacity is being controlled so the ENTERING CHILLED WATER
temperature is being maintained within 1/2 of the CHILLED WATER DEADBAND
on either side of the CONTROL POINT. See TEMP_CTL screen.
RUNNING — TEMP CONTROL
TEMPERATURE RAMP
LOADING
Ramp Loading based on LEAVING CHILLED WATER or ENTERING CHILLED
WATER is in effect. PULLDOWN RAMP TYPE = 0. Capacity inhibit is in effect
because LEAVING CHILLED WATER or ENTERING CHILLED WATER has fallen
below the ramping temperature pulldown Setpoint. See RAMP_DEM screen.
RUNNING — DEMAND LIMITED
BY DEMAND RAMP LOAD-
ING
Ramp Loading based on AVERAGE LINE CURRENT or MOTOR PERCENT
KILOWATTS is in effect. PULLDOWN RAMP TYPE = 0. Capacity inhibit is in effect
because AVERAGE LINE CURRENT or MOTOR PERCENT KILOWATTS has
exceeded the ramping active demand limit. See RAMP_DEM screen.
RUNNING — DEMAND LIMITED
BY LOCAL DEMAND SET-
POINT
Actual demand has exceeded ACTIVE DEMAND LIMIT. 20mA DEMAND LIMIT
OPT is DISABLED. ACTIVE DEMAND LIMIT is set equal to BASE DEMAND
LIMIT. AVERAGE LINE CURRENT or MOTOR PERCENT KILOWATTS is greater
than ACTIVE DEMAND LIMIT.
RUNNING — DEMAND LIMITED
BY 4-20 mA SIGNAL Actual demand has exceeded ACTIVE DEMAND LIMIT. 20mA DEMAND LIMIT
OPT is ENABLED. ACTIVE DEMAND LIMIT is adjusted based on 4-20 mA Auto
Demand Limit signal received on CCM J5-1 and J5-2. AVERAGE LINE CURRENT
or MOTOR PERCENT KILOWATTS is greater than ACTIVE DEMAND LIMIT.
RUNNING — DEMAND LIMITED
BY CCN SIGNAL Actual demand has exceeded ACTIVE DEMAND LIMIT. Chiller CONTROL MODE
= CCN. Value of ACTIVE DEMAND LIMIT is being forced by a CCN device. AVER-
AGE LINE CURRENT or MOTOR PERCENT KILOWATTS is greater than ACTIVE
DEMAND LIMIT.
RUNNING — DEMAND LIMITED
BY LOADSHED/REDLINE Actual demand has exceeded ACTIVE DEMAND LIMIT. Chiller CONTROL MODE
= CCN. Value of ACTIVE DEMAND LIMIT was set equal to AVERAGE LINE CUR-
RENT or MOTOR PERCENT KILOWATTS at the time a Redline command was
received by the loadshed POC. AVERAGE LINE CURRENT of MOTOR PER-
CENT KILOWATTS is greater than ACTIVE DEMAND LIMIT. See LOADSHED
screen.
RUNNING — TEMP CONTROL
HOT GAS BYPASS SURGE LIMIT/HGBP OPTION = 1 and HOT GAS BYPASS RELAY is ON. See
surge prevention description and OPTIONS screen. If VFD OPTION is ENABLED
then TARGET VFD SPEED = VFD MAXIMUM SPEED or the TARGET VFD
SPEED is forced.
RUNNING — DEMAND LIMITED
BY LOCAL SIGNAL ACTIVE DEMAND LIMIT has been manually forced on MAINSTAT screen. Chiller
CONTROL MODE = LOCAL.
RUNNING —TEMP CONTROL
ICE BUILD MODE ICE BUILD OPTION is set to ENABLE and chiller is running under Ice Build tem-
perature control. OCCPC02S Ice Build Schedule is OCCUPIED.
RUNNING —TEMP CONTROL
IN VFD RAMPDOWN VFD OPTION is ENABLED. VFD Rampdown goes into effect following the com-
pletion of start-up Ramp Loading and when the water temperature is within or
below the CHILLED WATER DEADBAND.
RUNNING —TEMP CONTROL
HGBP IS ADDING LOAD SURGE LIMIT/HGBP OPTION = 2. CHILLED WATER DELTA T is less than HGBP
ON DELTA T. See OPTIONS and SURGPREV screens.