Carrier Comprehensive Guide to Alarm Codes: A140, A152, T114, T115, T116, T117, and T133

Table 42 — Alarm and Alert Codes (cont)

ALARM/	ALARM		WHY WAS THIS	ACTION TAKEN	RESET	PROBABLE
ALERT	OR	DESCRIPTION	ALARM
				BY CONTROL	METHOD	CAUSE
CODE	ALERT		GENERATED?
			If the compressors are off
T110	Alert	Circuit A Loss of Charge	and discharge pressure	Circuit not allowed to	Manual	Refrigerant leak or
			reading is < 26 psig for	start.		transducer failure
			30 sec.
			If the compressors are off
T111	Alert	Circuit B Loss of Charge	and discharge pressure	Circuit not allowed to	Manual	Refrigerant leak or
			reading is < 26 psig for	start.		transducer failure
			30 sec.
			Circuit saturated suction			Faulty Expansion valve,
T112	Alert	Circuit A High Saturated	temperature pressure	Circuit shut down	Manual	faulty suction pressure
		Suction Temperature	transducer > 70 F (21.1 C)			transducer or high entering
			for 5 minutes			fluid temperature.
		Circuit B High Saturated	Circuit saturated suction			Faulty Expansion valve,
T113			temperature pressure			faulty suction pressure
	Alert	Suction Temperature		Circuit shut down	Manual
			transducer > 70 F (21.1 C)			transducer or high entering
			for 5 minutes			fluid temperature.
					Automatic restart	Faulty expansion valve,
T114		Circuit A Low Suction	Suction superheat is		after first daily	faulty suction pressure
	Alert		less than 5° F (2.8 C) for 5	Circuit A shut down.	occurrence.	transducer, faulty suction gas
		Superheat
			minutes.		Manual restart	thermistor, circuit
					thereafter.	overcharged
					Automatic restart	Faulty expansion valve,
T115		Circuit B Low Suction	Suction superheat is		after first daily	faulty suction pressure
	Alert		less than 5° F (2.8 C) for 5	Circuit B shut down.	occurrence.	transducer, faulty suction
		Superheat
			minutes.		Manual restart	gas thermistor, circuit
					thereafter.	overcharged
			Mode 7 caused the com-			Faulty expansion valve, low
T116		Circuit A Low Cooler	pressor to unload 6 consecu-			refrigerant charge, plugged
	Alert		tive times with less than a	Circuit shut down	Manual	filter drier, faulty suction
		Suction Temperature
			30-minute interval between			pressure transducer, low
			each circuit shutdown.			cooler fluid flow
			Mode 8 caused the com-			Faulty expansion valve, low
T117		Circuit B Low Cooler	pressor to unload 6 consecu-			refrigerant charge, plugged
	Alert		tive times with less than a	Circuit shut down	Manual	filter drier, faulty suction
		Suction Temperature
			30-minute interval between			pressure transducer, low
			each circuit shutdown.			cooler fluid flow
T118		High Discharge Gas	Discharge Thermistor (DTT)	Compressor A1 shut		Refrigerant charge, plugged
	Alert				Automatic	filter drier, head pressure
		Temperature Alert	reading is greater than 250 F	down
						control.
A118		High Discharge Gas	3 Discharge Gas Tempera-	Compressor A1 shut		Refrigerant charge, plugged
	Alarm		ture alarms occur within a		Manual	filter drier, head pressure
		Temperature		down
			day			control.
					Automatic, only
					after first 3 daily
					occurrences.	Faulty transducer/high
					Manual reset
T126		Circuit A High	Compressor operation out-			pressure switch, low/
	Alert			Circuit shut down	thereafter. Read-
		Discharge Pressure	side of operating envelope.			restricted condenser
					ing from OAT sen-
						airflow
					sor must drop 5 F
					(2.8 C) before
					restart
					Automatic, only
					after first 3 daily	Faulty transducer/high
					occurrences. Man-
T127	Alert	Circuit B High	Compressor operation out-	Circuit shut down	ual reset thereafter.	pressure switch, low/
		Discharge Pressure	side of operating envelope.		Reading from OAT	restricted condenser
					sensor must drop	airflow
					5 F (2.8 C) before
					restart
					Automatic
T133		Circuit A Low Suction	Suction pressure below		restart after first	Faulty or sticking EXV, low
	Alert		34 psig for 8 seconds or	Circuit shut down	daily occurrence.	refrigerant charge, plugged
		Pressure
			below 23 psig		Manual restart	filter drier.
					thereafter.
					Automatic
T134		Circuit B Low Suction	Suction pressure below		restart after first	Faulty or sticking EXV, low
	Alert		34 psig for 8 seconds or	Circuit shut down	daily occurrence.	refrigerant charge, plugged
		Pressure
			below 23 psig		Manual restart	filter drier.
					thereafter.
A140		Reverse Rotation	Incoming chiller power leads	Chiller not allowed to		Reverse any two incoming
	Alert				Manual	power leads to correct. Check
		Detected	not phased correctly	start.
						for correct fan rotation first.
				Chiller shutdown	Automatic once
A150			CCN emergency stop		CCN command for	CCN Network
	Alarm	Emergency Stop		without going through
			command received		EMSTOP returns to	command.
				pumpdown.
					normal
A151			One or more illegal	Chiller is not allowed to	Manual once	Configuration error.
	Alarm	Illegal Configuration			configuration errors
			configurations exists.	start.		Check unit settings.
					are corrected
					Automatic once
A152		Unit Down Due to	Both circuits are down due	Chiller is unable	alarms/alerts are	Alarm notifies user
	Alarm				cleared that pre-	that chiller is 100%
		Failure	to alarms/alerts.	to run.
					vent the chiller from	down.
					starting.

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