Carrier Air Conditioner Alarm and Alert Codes cont, CCN command for, Manual once con

Table 29 — 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?
A150	Alarm	Emergency Stop	CCN emergency stop	Chiller shutdown	Automatic once	CCN Network
			command received	without going	CCN command for	command.
				through pumpdown.	EMSTOP returns
					to normal
A151	Alarm	Illegal Configuration	One or more of the ille-	Chiller is not	Manual once con-	Configuration
			gal configurations	allowed to start.	figuration errors	error. See Note on
			exists.		are corrected	page 52.
A152	Alarm	Unit Down Due to	Both circuits are down	Chiller is unable	Automatic once	Alarm notifies user
		Failure	due to alarms/alerts.	to run.	alarms/alerts are	that chiller is100%
					cleared that pre-	down.
					vent the chiller
					from starting.
T153	Alert	Real Time Clock	Internal clock on MBB	Occupancy sched-	Automatic when	Time/Date/Month/
		Hardware Failure	fails	ule will not be used.	correct clock con-	Day/Year not prop-
				Chiller defaults to	trol restarts.	erly set.
				Local On mode.
A154	Alarm	Serial EEPROM	Hardware failure with	Chiller is unable	Manual	Main Base Board
		Hardware Failure	MBB	to run.		failure.
T155	Alert	Serial EEPROM	Configuration/storage	No Action	Manual	Potential failure of
		Storage Failure	failure with MBB			MBB. Download
						current operating
						software. Replace
						MBB if error
						occurs again.
A156	Alarm	Critical Serial	Configuration/storage	Chiller is not	Manual	Main Base Board
		EEPROM Storage	failure with MBB	allowed to run.		failure.
		Failure
A157	Alarm	A/D Hardware	Hardware failure with	Chiller is not	Manual	Main Base Board
		Failure	peripheral device	allowed to run.		failure.
T170	Alert	Loss of Communica-	MBB loses communica-	Compressors A3,	Automatic	Wiring error, faulty
		tion with CXB	tion with CXB	A4 and B3 and		wiring or failed
				unloaders A2/B2		CXB module.
				unable to operate.
A172	Alarm	Loss of Communica-	MBB loses communica-	Chiller shutdown	Automatic	Wiring error, faulty
		tion with EXV	tion with EXV	without going		wiring or failed
				through pumpdown.		EXV module.
T173	Alert	Loss of Communica-	MBB loses communica-	4 to 20 mA tempera-	Automatic	Wiring error, faulty
		tion with EMM	tion with EMM	ture reset disabled.		wiring or failed
				Demand Limit set to		Energy Manage-
				100%. 4 to 20 mA		ment Module
				set point disabled.		(EMM).
T174	Alert	4 to 20 mA Cooling	If configured with EMM	Set point function	Automatic	Faulty signal gen-
		Set Point Input Fail-	and input less than	disabled. Chiller		erator, wiring
		ure	2 mA or greater than	controls to CSP.1.		error, or faulty
			22 mA			EMM.
T176	Alert	4 to 20 mA Tempera-	If configured with EMM	Reset function dis-	Automatic	Faulty signal gen-
		ture Reset Input	and input less than	abled. Chiller		erator, wiring
		Failure	2 mA or greater than	returns to normal		error, or faulty
			22 mA	set point control.		EMM.
T177	Alert	4 to 20 mA Demand	If configured with EMM	Demand limit func-	Automatic	Faulty signal gen-
		Limit Input Failure	and input less than	tion disabled. Chiller		erator, wiring
			2 mA or greater than	returns to 100%		error, or faulty
			22 mA	demand limit		EMM.
				control.
A200	Alarm	Cooler Pump Inter-	Interlock not closed	Cooler pump shut	Manual	Failure of cooler
		lock Failure to Close	within 5 minutes after	off. Chiller shutdown		pump, flow switch,
		at Start-Up	unit is started	without going		or interlock.
				through pumpdown.
A201	Alarm	Cooler Pump Inter-	Interlock opens during	Cooler pump shut	Manual	Failure of cooler
		lock Opened During	operation	off. Chiller shutdown		pump, flow switch,
		Normal Operation		without going		or interlock.
				through pumpdown.
A202	Alarm	Cooler Pump Inter-	If configured for cooler	Chiller is not	Manual	Failure of cooler
		lock Closed When	pump control and inter-	allowed to start.		pump relay or
		Pump is Off	lock closes while cooler			interlock, welded
			pump relay is off			contacts.

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