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Table 4 — ICVC Alert Codes (cont)
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
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.