T153, T155, T170, T173, T174, T176, T177

Table 29 — Alarm and Alert Codes (cont)

ALARM/	ALARM		WHY WAS THIS	ACTION TAKEN	RESET	PROBABLE
ALERT	OR	DESCRIPTION	ALARM	ACTION TAKEN	RESET	PROBABLE
ALERT	OR	DESCRIPTION	ALARM	BY CONTROL	METHOD	CAUSE
CODE	ALERT		GENERATED?	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.

Air Conditioner specifications

Carrier Air Conditioners have long been synonymous with reliability and innovation in climate control. Founded by Willis Carrier, the inventor of modern air conditioning, the brand has continuously set industry standards through state-of-the-art technologies and features designed to enhance indoor comfort.

One of the standout features of Carrier air conditioners is their energy efficiency. Many models are equipped with advanced inverter technology, allowing the compressor to adjust its speed based on the cooling demand. This results in decreased energy consumption, which not only reduces utility bills but also lessens the environmental impact. Recognizing the importance of sustainable practices, Carrier has integrated eco-friendly refrigerants into their systems, further promoting energy-efficient operations.

Carrier also emphasizes user comfort through its variable speed systems. These systems maintain consistent temperatures while minimizing temperature fluctuations, ensuring an even distribution of cool air throughout the home. Additionally, many Carrier models come with advanced air filtration systems, designed to capture allergens, dust, and other particulates, thereby improving indoor air quality.

The smart technology featured in Carrier air conditioners plays a key role in modern convenience. Many units are compatible with smart home systems, allowing users to control settings remotely via smartphones or voice-activated devices. With features like programmable thermostats, users can easily set cooling schedules to match their lifestyle, ensuring comfort while maximizing energy savings.

Durability and noise reduction are also central to the Carrier brand. Many models are designed with sound-dampening features, making them some of the quietest units on the market. This is particularly advantageous for residential use, where noise can disrupt daily activities and sleep.

In terms of design, Carrier air conditioners come in various styles and capacities to suit a wide range of spaces, from compact apartment units to large central systems for sprawling homes. Their extensive warranty and service offerings further reinforce Carrier’s commitment to customer satisfaction.

In conclusion, Carrier air conditioners represent a perfect blend of cutting-edge technology, energy efficiency, and user comfort. Their emphasis on sustainability and smart features positions them as a leading choice for homeowners seeking reliable and innovative climate control solutions. Whether for cooling a small room or an entire house, Carrier remains a trusted name in air conditioning.

Carrier Air Conditioner specifications T153, T155, T170, T173, T174, T176, T177

Models: Air Conditioner

Table 29 — Alarm and Alert Codes (cont)

BY CONTROL

figuration errors

error. See Note on

exists.

are corrected

T153

T155

T170

T173

T174

T176

T177

Air Conditioner specifications