Carrier 19XL specifications LOW Chilled Water

Table 9 Ð LID Primary and Secondary Messages and Custom Alarm/Alert Messages

with Troubleshooting Guides (cont)

F. START-UP FAILURES: This is an alarm condition. A manual reset is required to clear.

PRIMARY MESSAGE	SECONDARY MESSAGE	ALARM MESSAGE/PRIMARY CAUSE					ADDITIONAL CAUSE/REMEDY
FAILURE TO START		OILPD [VALUE] exceeded limit of					Check for closed oil supply valves. Check
	LOW OIL PRESSURE						oil ®lter. Check for low oil temperature.
		[LIMIT]*. Check oil pump system.
							Check transducer accuracy.
							Check for excessive refrigerant in oil sump.
FAILURE TO START		OILPD [VALUE] exceeded limit of					Run oil pump manually for 5 minutes.
	OIL PRESS SENSOR FAULT						Check transducer calibration. Check cooler
		[LIMIT]*. Check oil pressure sensor.
							pressure transducer calibration. Check
							wiring. Replace transducer if necessary.
FAILURE TO START	LOW CHILLED WATER	EVFL Evap Flow Fault: Check water					Check wiring to ¯ow switch. Check through
	FLOW	pump/¯ow switch.					Control Test for proper switch operation.
FAILURE TO START	LOW CONDENSER	CDFL Cond. Flow Fault: Check water					Check wiring to ¯ow switch. Check through
	WATER FLOW	pump/¯ow switch.					Control Test for proper switch operation.
FAILURE TO START	STARTER FAULT	STR			FLT Starter Fault: Check Starter		A starter protective device has faulted.
							Check starter for ground fault, voltage trip,
		for Fault Source.
							temperature trip, etc.
FAILURE TO START	STARTER OVERLOAD TRIP	STR			FLT Starter Overload Trip:		Reset overloads before restart.
		Check amps calibration/reset overload.
							Check voltage supply. Check transformers
FAILURE TO START	LINE VOLTAGE DROPOUT	V	P Single-Cycle Dropout Detected:				for supply. Check with utility if voltage
							supply is erratic. Monitor must be installed
		Check voltage supply.
							to con®rm consistent, single-cycle drop-
							outs. Check low oil pressure switch.
							Check the high-pressure switch. Check for
		High Condenser Pressure [OPEN]*:					proper condenser pressures and con-
							denser water¯ow. Check for fouled tubes.
		Check switch, oil pressure contact, and
							Check the 2C aux contact and the oil
		water temperature/¯ow.
	HIGH CONDENSER						pressure switch in the power panel. This
FAILURE TO START
	PRESSURE						alarm is not caused by the transducer.
		High Condenser Pressure [VALUE]*:					Check water ¯ow in condenser. Check for
							fouled tubes. Transducer should be
		Check switch, water ¯ow, and
							checked for accuracy. This alarm is not
		transducer.
							caused by the high pressure switch.
FAILURE TO START	EXCESS ACCELERATION	CA		P Excess Acceleration:			Check that guide vanes are closed at
							start-up. Check starter for proper operation.
	TIME	Check guide vane closure at start-up.
							Reduce unit pressure if possible.
FAILURE TO START	STARTER TRANSITION	RUN				AUX Starter Transition Fault:	Check starter for proper operation.
	FAULT	Check 1CR/1M/Interlock mechanism.					Run contact failed to close.
FAILURE TO START	1CR AUX CONTACT FAULT	1CR			AUX Starter Contact Fault:		Check starter for proper operation.
		Check 1CR/1M aux. contacts.					Start contact failed to close.
		CA		P Motor Amps Not Sensed:			Check for proper motor amps signal to
FAILURE TO START	MOTOR AMPS NOT SENSED						SMM. Check wiring from SMM to current
		Check motor load signal.					transformer. Check main motor circuit
							breaker for trip.
							Pressures at transducers indicate another
FAILURE TO START	CHECK REFRIGERANT	Current Refrigerant Properties					refrigerant type in Control Test. Make sure
		Abnormal Ð					to access the ATTACH TO NETWORK
	TYPE
		Check Selection of refrigerant type					DEVICE table after changing refrigerant
							type.
							The oil pressure differential switch is open
		Low Oil Pressure [LIMIT]*:					when the compressor tried to START.
FAILURE TO START							Check the switch for proper operation.
	LOW OIL PRESSURE	Check oil pressure switch/pump
							Also, check the oil pump interlock (2C aux)
		and 2C aux.
							in the power panel and the high condenser
							pressure switch.

*[LIMIT] is shown on the LID as the temperature, pressure, voltage, etc., set point prede®ned 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. [OPEN] indicates that an input circuit is open.

NOTE: See Legend on page 68.

70