Specifications
100
Table 16 — Alarm and Alert Messages (cont)
J. CHILLER ALERTS (cont)
*[LIMIT] is shown on the ICVC as the temperature, pressure, voltage, etc., set point predefined or selected by the operator as an override, alert, or
alarm condition. [VALUE] is the actual pressure, temperature, voltage, etc., at which the control tripped.
ICVC FAULT
STATE
PRIMARY
MESSAGE
SECONDARY
MESSAGE
PRIMARY CAUSE ADDITIONAL CAUSE/REMEDY
151
CONDENSER
PRESSURE ALERT
PUMP RELAY
ENERGIZED
151High Condenser Pres-
sure [VALUE]: Pump Ener-
gized to Reduce Pressure.
Check sensor wiring and accuracy.
Check condenser flow and water temperature.
Check for fouled tubes.
This alarm is not caused by the High Pressure
Switch.
152 RECYCLE ALERT
EXCESSIVE RECYCLE
STARTS
152Excessive recycle
starts.
Chiller load is too low to keep compressor on
line and there has been more than 5 starts in
4 hours.
Increase chiller load, adjust hot gas bypass,
increase RECYCLE RESTART DELTA T from
SETUP1 Screen.
153
no message:
ALERT
only
no message; ALERT only
153Lead/Lag Disabled-
Config: Duplicate Chiller
Address.
Illegal chiller address configuration in Lead/Lag
screen. Both chillers require a different address.
154
POTENTIAL
FREEZE-UP
COND PRESS/TEMP
TOO LOW
154Condenser freeze up
prevention.
The condenser pressure transducer is reading a
pressure that could freeze the condenser tubes.
Check for condenser refrigerant leaks.
Check fluid temperature.
Check sensor wiring and accuracy.
Place the chiller in PUMPDOWN mode if the
vessel is evacuated.
155
OPTION SENSOR
FAULT
REMOTE RESET
SENSOR
155Sensor Fault/Option
Disabled: Remote Reset
Sensor.
Check sensor resistance or voltage drop.
Check for proper wiring to CCM connector J4.
156
OPTION SENSOR
FAULT
AUTO CHILLED WATER
RESET
156Sensor Fault/Option
Disabled: Auto Chilled Water
Reset.
Check sensor resistance or voltage drop.
Check for proper wiring to CCM connector J5.
157
OPTION SENSOR
FAULT
AUTO DEMAND LIMIT
INPUT
157Sensor Fault/Option
Disabled: Auto Demand Limit
Input.
Check sensor resistance or voltage drop.
Check for proper wiring to CCM connector J5.
158 SENSOR ALERT
SPARE TEMPERATURE
#1
158Spare Temperature 1
[VALUE] exceeded limit of
[LIMIT]*.
Check sensor resistance or voltage drop.
Check for proper wiring to CCM connector J4.
Check Spare Temp #1 Limit in SETUP1 screen.
159 SENSOR ALERT
SPARE TEMPERATURE
#2
159Spare Temperature 2
[VALUE] exceeded limit of
[LIMIT]*.
Check sensor resistance or voltage drop.
Check for proper wiring to CCM connector J4.
Check Spare Temp #2 Limit in SETUP1 screen.
161
LOSS OF
COMMUNICATION
WITH WSM
161WSM Cool Source —
Loss of Communication.
Check settings in WSMDEFME screen.
Check CCN communications link with WSM
(Water System Manager) Module.
Check Supervisory Part of WSM.
162 SENSOR ALERT
EVAPORATOR
APPROACH
162Evaporator Approach
[VALUE] Exceeded Limit of
[LIMIT]*.
Check that refrigerant charge level is adequate,
waterbox division plate gaskets are sealing,
evaporator tubes are not fouled and that oil
reclaim system is working.
Check sensor resistance or voltage drop.
Check for proper wiring.
Check Evap Approach Alert setting in SETUP1
screen.
163 SENSOR ALERT CONDENSER APPROACH
163Condenser Approach
[VALUE] Exceeded Limit of
[LIMIT]*.
Check sensors resistance or voltage drop.
Check for proper wiring.
Check Cond Approach Alert setting in SETUP1
screen.
Check for noncondensable gas in the
condenser.
Check that the condenser tubes are not fouled.
164 VFD SPEED ALERT LOW VFD SPEED
164Actual VFD Speed
exceeded limit of Target VFD
Speed –10%.
Actual VFD Speed on COMPRESS screen must
be at least 90% of Target VFD Speed.
165
AUTORESTART
PENDING
LOW DC BUS VOLTAGE
165Low DC Bus Voltage:
[VALUE] Exceeded Limit of
[LIMIT]*.
Verify phase to phase and phase to ground line
voltage.
166
AUTORESTART
PENDING
HIGH DC BUS VOLTAGE
166High DC Bus Voltage:
[VALUE] Exceeded Limit of
[LIMIT]*.
Verify phase to phase and phase to ground line
voltage. Monitor AC line for high transient volt-
age conditions.
167 SYSTEM ALERT HIGH DISCHARGE TEMP
167Comp Discharge Temp
[VALUE] exceeded limit of
[LIMIT]*.
Check sensor resistance or voltage drop.
Check for proper wiring.
Check for excessive starts.
Check Comp Discharge Alert setting in SETUP1
screen.
168 SENSOR ALERT
HUMIDITY SENSOR
INPUT
168Sensor Fault: Check
Humidity Sensor Input Sensor.
Check humidity sensor wiring on CCM connec-
tors J3 and J5. CCM switch SW2-1 must be in
“OFF” position.
Check Humidity Sensor Input in Controls Test.