Carrier Comprehensive Guide on Chiller Alarm Codes and Guide Vane Calibration

Table 11 — CVC/ICVC Primary and Secondary Messages and

Custom Alarm/Alert Messages with Troubleshooting Guides (cont)

I. CHILLER PROTECT LIMIT FAULTS (cont)

STATE	PRIMARY	SECONDARY	ALARM MESSAGE	ADDITIONAL
	MESSAGE	MESSAGE	PRIMARY CAUSE	CAUSE/REMEDY
246	PROTECTIVE	INVALID DIFFUSER	246->Diffuser Control Invalid	Check diffuser/guide vane schedule.
	LIMIT	CONFIG	Configuration:
			Check SETUP2 Entries.
247	PROTECTIVE	DIFFUSER POSITION	247->Diffuser Position Fault:	Check rotating stall transducer wiring and
	LIMIT	FAULT	Check Guide Vane and Diffuser	accuracy.
			Actuators	Check diffuser schedule.
				Check for proper operation of diffuser actuator
				and inlet guide vane actuator.
				Check diffuser coupling.
				Check inlet guide vane operation.
				Check inlet guide vane calibration.
				Check diffuser/inlet guide vane schedule.
				Check diffuser mechanical set-up for proper
				orientation.
				If not using variable diffuser, check that the
				option has not been enabled.
248	PROTECTIVE	SPARE TEMPERATURE	248->Spare Temperature #1
	LIMIT	#1	[VALUE] exceeded limit of
			[LIMIT]*.
249	PROTECTIVE	SPARE TEMPERATURE	249->Spare Temperature #2
	LIMIT	#2	[VALUE] exceeded limit of
			[LIMIT]*.
250	PROTECTIVE	REFRIGERANT LEAK	250->Refrigerant Leak Sensor	The refrigerant leak detector’s output wired to
	LIMIT	SENSOR	[VALUE] exceeded Limit of	J5-5 and J5-6 on the CCM module has
			[LIMIT]*.	reached the alarm limit.
				Check leak detector and for leaks.
251	PROTECTIVE	ISM CONFIG	251->ISM Config Conflict (ISM	Confirm valid settings in ISM_CONF screen.
	LIMIT	CONFLICT	Uploaded); Verify to Reset Alarm
252	PROTECTIVE	ISM CONFIG	252->ISM Config Conflict (ISM	Confirm valid settings in ISM_CONF screen.
	LIMIT	CONFLICT	Downloaded); Verify to Reset
			Alarm
253	PROTECTIVE	GUIDE VANE	253->Guide Vane Fault [VALUE].	Enter Control Test and execute Guide Vane
	LIMIT	CALIBRATION	Check Calibration.	Calibration. Check guide vane feedback (ter-
				minals J4-9 and J4-10) on the CCM module.

*[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.

J. CHILLER ALERTS

STATE	PRIMARY	SECONDARY	ALARM MESSAGE	ADDITIONAL
	MESSAGE	MESSAGE	PRIMARY CAUSE	CAUSE/REMEDY
140	SENSOR ALERT	LEAVING COND	140->Sensor Fault:	Check sensor resistance or voltage drop.
		WATER TEMP	Check Leaving Cond Water	Check for proper wiring.
			Sensor
141	SENSOR ALERT	ENTERING COND	141->Sensor Fault:	Check sensor resistance or voltage drop.
		WATER TEMP	Check Entering Cond Water	Check for proper wiring.
			Sensor
142	LOW OIL PRESSURE	CHECK OIL FILTER	142->Low Oil Pressure Alert.	Check for partially or closed shut-off valves.
	ALERT		Check Oil Filter.	Check oil filter.
				Check oil pump and power supply.
				Check oil level.
				Check for foaming oil at start-up.
				Check transducer wiring and accuracy.
143	AUTORESTART	LINE PHASE	143->Line Phase Loss	Power loss has been detected in any phase.
	PENDING	LOSS		Chiller automatically restarting.
144	AUTORESTART	LINE VOLTAGE	144->Single Cycle Line	A drop in line voltage has been detected within
	PENDING	DROP OUT	Voltage Dropout	2 voltage cycles. Chiller automatically restarting if
				Autorestart option is enabled.
145	AUTORESTART	HIGH LINE	145>Line Overvoltage —	Check line power.
	PENDING	VOLTAGE	Average Line Volt [VALUE]
146	AUTORESTART	LOW LINE	146->Line Undervoltage —	Check line power.
	PENDING	VOLTAGE	Average Line Volt [VALUE]
147	AUTORESTART	STARTER MODULE	147->Starter Module Power-	ISM has detected a hardware fault and has reset.
	PENDING	RESET	On Reset When Running	Chiller automatically restarting.
148	AUTORESTART	POWER LOSS	148->Control Power-Loss	Check control power.
	PENDING		When Running

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