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Table 9 — CVC Primary and Secondary Messages and
Custom Alarm/Alert Messages with Troubleshooting Guides (cont)
J. CHILLER ALERTS (cont)
*[LIMIT] is shown on the CVC 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.
STATE
PRIMARY
MESSAGE
SECONDARY
MESSAGE
ALARM MESSAGE
PRIMARY CAUSE
ADDITIONAL CAUSE/REMEDY
151
CONDENSER
PRESSURE
ALERT
PUMP RELAY
ENERGIZED
151->High Condenser
Pressure [VALUE]: Pump
Energized to Reduce
Pressure.
Check sensor wiring and accuracy.
Check condenser flow and fluid
temperature.
Check for fouled tubes. This alarm is not
caused by the High Pressure Switch.
152
RECYCLE
ALERT
EXCESSIVE RECYCLE
STARTS
152->Excessive 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
153->Lead/Lag Disabled:
Duplicate Chiller Address;
Check Configuration
Illegal chiller address configuration in Lead/
Lag screen. Both chillers require a different
address.
154
POTENTIAL
FREEZE-UP
COND PRESS/TEMP
TOO LOW
154->Condenser 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
155->Sensor Fault/Option
Disabled:
Remote Reset Sensor
Check sensor resistance or voltage drop.
Check for proper wiring.
156
OPTION SENSOR
FAULT
AUTO CHILLED
WATER RESET
156->Sensor Fault/Option Dis-
abled:Auto Chilled Water Reset
Check sensor resistance or voltage drop.
Check for proper wiring.
157
OPTION SENSOR
FAULT
AUTO DEMAND
LIMIT INPUT
157->Sensor Fault/Option
Disabled:
Auto Demand Limit Input
Check sensor resistance or voltage drop.
Check for proper wiring.
158
SENSOR ALERT
SPARE TEMPERATURE
#1
158->Spare Temperature #1
[VALUE] exceeded limit of
[LIMIT].*
Check sensor resistance or voltage drop.
Check for proper wiring.
159
SENSOR ALERT
SPARE TEMPERATURE
#2
159->Spare Temperature #2
[VALUE] exceeded limit of
[LIMIT].*
Check sensor resistance or voltage drop.
Check for proper wiring.
160
MACHINE ALERT
DIRTY OIL FILTER
160->Oil Filter Delta P [VALUE]
exceeds limit of [LIMIT]. Check
oil solenoid and filter.
Check sensor(s).
Check filter.
