Carrier 19XR CVC/ICVC Primary and Secondary Messages and, I. CHILLER PROTECT LIMIT FAULTS cont

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
227	PROTECTIVE	OIL PRESS	227->Oil Pump Delta P	Check transducer wiring and accuracy.
	LIMIT	SENSOR FAULT	[VALUE] exceeded limit of	Check power supply to pump.
			[LIMIT]*.	Check pump operation.
				Check transducer calibration.
228	PROTECTIVE	LOW OIL	228->Oil Pump Delta P	Check transducer wiring and accuracy.
	LIMIT	PRESSURE	[VALUE] exceeded limit of	Check power supply to pump.
			[LIMIT].*	Check pump operation.
				Check oil level.
				Check for partially closed service valves.
				Check oil filters.
				Check for foaming oil at start-up.
				Check transducer calibration.
229	PROTECTIVE	LOW CHILLED	229->Low Chilled Water	Perform pump control test.
	LIMIT	WATER FLOW	Flow; Check Delta P Config	Check transducer accuracy and wiring.
			& Calibration	Check water valves.
				Check transducer calibration.
230	PROTECTIVE	LOW CONDENSER	230->Low Condenser Water	Perform pump control test.
	LIMIT	WATER FLOW	Flow; Check Delta P Config	Check transducer accuracy and wiring.
			& Calibration	Check water valves.
				Check transducer calibration.
231	PROTECTIVE	HIGH DISCHARGE	231->Comp Discharge	Check sensor resistance or voltage drop.
	LIMIT	TEMP	Temp [VALUE] exceeded	Check for proper wiring.
			limit of [LIMIT].*	Check for proper condenser flow and temperature.
				Check for proper inlet guide vane and diffuser
				actuator operation.
				Check for fouled tubes or noncondensables in the
				system.
232	PROTECTIVE	LOW REFRIGERANT	232->Evaporator Refrig	Check for proper refrigerant charge.
	LIMIT	TEMP	Temp [VALUE] exceeded	Check float operation.
			limit of [LIMIT]*.	Check for proper fluid flow and temperature.
				Check for proper inlet guide vane operation.
233	PROTECTIVE	HIGH MOTOR	233->Comp Motor Winding	Check motor sensors wiring and accuracy.
	LIMIT	TEMPERATURE	Temp [VALUE] exceeded	Check motor cooling line for proper operation, or
			limit of [LIMIT]*.	restrictions.
				Check for excessive starts within a short time span.
234	PROTECTIVE	HIGH BEARING	234->Comp Thrust Bearing	Check oil heater for proper operation.
	LIMIT	TEMPERATURE	Temp [VALUE] exceeded	Check for low oil level, partially closed oil supply
			limit of [LIMIT]*.	valves, clogged oil filters, etc.
				Check the sensor wiring and accuracy.
235	PROTECTIVE	HIGH CONDENSER	235->Condenser Pressure	Check for high condenser water temperatures, low
	LIMIT	PRESSURE	[VALUE] exceeded limit of	water flow, fouled tubes.
			[LIMIT]*.	Check for division plate/gasket bypass.
				Check for noncondensables.
				Check transducer wiring and accuracy.
236	PROTECTIVE	CCN OVERRIDE	236->CCN Override Stop	CCN has signaled the chiller to stop. Reset and
	LIMIT	STOP	while in LOCAL run mode	restart when ready. If the signal was sent by the
				CVC/ICVC, release the stop signal on the STATUS01
				table.
237	PROTECTIVE	SPARE SAFETY	237->Spare Safety Device	Spare safety input has tripped or factory installed
	LIMIT	DEVICE		jumper is not present.
238	PROTECTIVE	EXCESSIVE	238->Compressor Surge:	Check condenser flow and temperatures.
	LIMIT	COMPR SURGE	Check condenser water	Check surge protection configuration.
			temp and flow
239	PROTECTIVE	TRANSDUCER	239->Transducer Voltage
	LIMIT	VOLTAGE FAULT	Ref [VALUE] exceeded limit
			of [LIMIT]*.
240	PROTECTIVE	LOW DISCHARGE	240->Check for Oil in
	LIMIT	SUPERHEAT	Refrigerant or Overcharge
			of Refrigerant
241	LOSS OF	WITH STARTER	241->Loss of Communica-	Check wiring to ISM.
	COMMUNICATION	MODULE	tion With Starter.
242	LOSS OF	WITH CCM	242->Loss of Communica-	Check wiring to CCM.
	COMMUNICATION	MODULE	tion With CCM.
243	POTENTIAL	EVAP PRESS/TEMP	243->Evaporator Refrig	Check for proper refrigerant charge.
	FREEZE-UP	TOO LOW	Temp [VALUE] exceeded	Check float operation.
			limit of [LIMIT]*.	Check for proper fluid flow and temperature.
				Check for proper inlet guide vane operation.
244	POTENTIAL	COND PRESS/TEMP	244->Condenser Refrig
	FREEZE-UP	TOO LOW	Temp [VALUE] exceeded
			limit of [LIMIT]*.
245	PROTECTIVE	VFD SPEED	245->Actual VFD Speed
	LIMIT	OUT OF RANGE	[VALUE] exceeded limit of
			[LIMIT]*.

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