Carrier Official Troubleshooting Manual for Chillers with Advanced Alerts

Table 11 — CVC/ICVC Primary and Secondary Messages and

Custom Alarm/Alert Messages with Troubleshooting Guides (cont)

J. CHILLER ALERTS (cont)

STATE	PRIMARY	SECONDARY	ALARM MESSAGE	ADDITIONAL
	MESSAGE	MESSAGE	PRIMARY CAUSE	CAUSE/REMEDY
149	SENSOR ALERT	HIGH DISCHARGE	149->Comp Discharge Temp	Check sensor resistance or voltage drop.
		TEMP	[VALUE] exceeded limit of	Check for proper wiring.
			[LIMIT]*.	Check for proper condenser flow and
				temperature.
				Check for high lift or low load.
				Check for proper inlet guide vane and diffuser
				actuator operation (Size 5 compressor Only).
				Check for fouled tubes or noncondensables in
				the refrigerant system.
150	SENSOR ALERT	HIGH BEARING	150->Comp Thrust Bearing	Check sensor resistance or voltage drop.
		TEMPERATURE	Temp [VALUE] exceeded limit	Check for proper wiring.
			of [LIMIT]*.	Check for partially closed service valves.
				Check oil cooler TXV.
				Check oil filter.
				Check oil level.
151	CONDENSER	PUMP RELAY	151->High Condenser	Check sensor wiring and accuracy.
	PRESSURE ALERT	ENERGIZED	Pressure [VALUE]: Pump	Check condenser flow and fluid
			Energized to Reduce	temperature.
			Pressure.	Check for fouled tubes. This alarm is not
				caused by the High Pressure Switch.
152	RECYCLE	EXCESSIVE RECYCLE	152->Excessive recycle starts.	Chiller load is too low to keep compressor on
	ALERT	STARTS		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:	no message;	153->Lead/Lag Disabled:	Illegal chiller address configuration in Lead/
	ALERT only	ALERT only	Duplicate Chiller Address;	Lag screen. Both chillers require a different
			Check Configuration	address.
154	POTENTIAL	COND PRESS/TEMP	154->Condenser freeze up	The condenser pressure transducer is read-
	FREEZE-UP	TOO LOW	prevention	ing a pressure that could freeze the con-
				denser 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	REMOTE RESET	155->Sensor Fault/Option	Check sensor resistance or voltage drop.
	FAULT	SENSOR	Disabled:	Check for proper wiring.
			Remote Reset Sensor
156	OPTION SENSOR	AUTO CHILLED	156->Sensor Fault/Option	Check sensor resistance or voltage drop.
	FAULT	WATER RESET	Disabled:	Check for proper wiring.
			Auto Chilled Water Reset
157	OPTION SENSOR	AUTO DEMAND	157->Sensor Fault/Option	Check sensor resistance or voltage drop.
	FAULT	LIMIT INPUT	Disabled:	Check for proper wiring.
			Auto Demand Limit Input
158	SENSOR ALERT	SPARE TEMPERATURE	158->Spare Temperature #1	Check sensor resistance or voltage drop.
		#1	[VALUE] exceeded limit of	Check for proper wiring.
			[LIMIT].*
159	SENSOR ALERT	SPARE TEMPERATURE	159->Spare Temperature #2	Check sensor resistance or voltage drop.
		#2	[VALUE] exceeded limit of	Check for proper wiring.
			[LIMIT].*
160	DIFFUSER	DIFFUSER	160->Diffuser Position Alert;	Check diffuser configuration in SETUP2
	ALERT	POSITION	Check Diffuser Configuration.	screen.

*[LIMIT] is shown on the CVC/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.

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