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Table 19 — ICVC Primary and Secondary Messages and
Custom Alarm/Alert Messages with Troubleshooting Guides (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.
J. CHILLER ALERTS (cont)
STATE PRIMARY MESSAGE
SECONDARY
MESSAGE
ALARM MESSAGE
PRIMARY CAUSE
ADDITIONAL
CAUSE/REMEDY
155
OPTION
SENSOR FAULT
REMOTE RESET
SENSOR
155->Sensor Fault/Option
Disabled: Remote
Reset Sensor
Type 2 Temperature Reset is enabled and
Remote Reset sensor on CCM J4-13 and
J4-14 is out of range.
Check Temperature Reset settings in
TEMP_CNTL screen.
Check REMOTE RESET sensor resistance
or voltage drop.
Check for proper REMOTE RESET sensor wiring.
156
OPTION
SENSOR FAULT
AUTO CHILLED
LIQUID RESET
156->Sensor Fault/Option
Disabled: Auto Chilled
Liquid Reset
Type 1 Temperature Reset is enabled and Auto
Chilled Water Reset input on CCM J5-3 and
J5-4 is < 2 mA.
Check Temperature Reset settings in
TEMP_CNTL screen.
Check that Auto Chilled Liquid Reset input is
between 4 mA and 20 mA.
157
OPTION
SENSOR FAULT
AUTO DEMAND
LIMIT INPUT
157->Sensor Fault/Option
Disabled: Auto Demand
Limit Input
20 mA DEMAND LIMIT OPTION is enabled and
Auto Demand Limit input on CCM J5-1 and J5-2
is < 2 mA.
Check 20 mA DEMAND LIMIT setting in
RAMP_DEM screen.
Check that Auto Demand Limit input is between
4 mA and 20 mA.
158 SENSOR ALERT
SPARE
TEMPERATURE #1
158->Spare Temperature
#1 [VALUE] exceeded
limit of [LIMIT].*
Check component that SPARE TEMPERATURE
#1 is monitoring.
Check SPARE TEMPERATURE #1 settings in
SETUP1 screen.
Check SPARE TEMPERATURE #1 sensor
resistance or voltage drop on CCM J4-25 and
J4-26.
Check for proper SPARE TEMPERATURE
#1 wiring.
159 SENSOR ALERT
SPARE
TEMPERATURE #2
159->Spare Temperature
#2 [VALUE] exceeded
limit of [LIMIT].*
Check component that SPARE TEMPERATURE
#2 is monitoring.
Check SPARE TEMPERATURE #2 settings in
SETUP1 screen.
Check SPARE TEMPERATURE #2 sensor
resistance or voltage drop on CCM J4-27
and J4-28.
Check for proper SPARE TEMPERATURE
#2 wiring.
160 SENSOR ALERT
EVAPORATOR
APPROACH
160->Evaporator
Approach [VALUE]
Exceeded Limit of
[LIMIT]*
Check position of refrigerant liquid
line isolation valve.
Check EVAP APPROACH ALERT setting in
SETUP1 screen.
Check Evaporator Liquid Flow.
See Table 5.
Check EVAP REFRIG LIQUID TEMP and
CHILLED LIQUID TEMP sensor resistances
or voltage drops.
Check for proper EVAP REFRIG LIQUID TEMP
and CHILLED LIQUID TEMP sensor wiring.
Check for oil loss.
Check for low refrigerant charge.
Check float valve operation and for refrigerant
stacking in the condenser.
Check for evaporator division plate bypass.
Check for fouled tubes.
Check for air in water box.
161 SENSOR ALERT
CONDENSER
APPROACH
161->Condenser
Approach [VALUE]
Exceeded Limit of
[LIMIT]*
Check COND APPROACH ALERT setting in
SETUP1 screen.
Check Condenser Liquid flow.
See Table 5.
Check CONDENSER PRESSURE and LEAVING
COND LIQUID temperature sensor resistances or
voltage drops.
Check for proper CONDENSER PRESSURE and
LEAVING COND LIQUID temperature sensor
wiring.
Check condenser shell temperature against
condenser pressure measured with refrigerant
gage for evidence of noncondensables in
refrigerant charge.
Check for condenser division plate bypass.
Check for fouled condenser tubes.
Check for air in water box.
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