Alarm and Alert Codes, Local/Enable-Stop-Ccn

Table 16 Ð Alarm and Alert Codes

	ALARM		ACTION TAKEN	CIRCUIT	RESET
DISPLAY	OR	DESCRIPTION	BY CONTROL	PUMPDOWN	METHOD	PROBABLE CAUSE
	ALERT
0	Ð	No Alarms or Alerts Exist	Ð	Ð	Ð	Ð
1		Compressor A1 failure	Circuit A shut down	No	Manual	High-pressure switch trip, or wiring
						error.
2, 3, 4	Alert	Compressor A2, A3, A4 failure	Compressor shut down	Yes	Manual	CPCS Ground Fault Protection
5		Compressor B1 failure	Circuit B shut down	No	Manual
6, 7, 8		Compressor B2, B3, B4 failure	Compressor shut down	Yes	Manual

9	Alarm	Leaving ¯uid thermistor failure	Unit shut down	Yes	Auto.
10	Alarm	Entering ¯uid thermistor failure	Unit shut down	Yes	Auto.
10		Entering ¯uid thermistor failure	Unit shut down	Yes	Auto.	Thermistor or transducer failure
19		Compressor A1 sensor failure	Circuit A shut down	Yes	Auto.

						or wiring error.
20	Alert	Compressor B1 sensor failure	Circuit B shut down	Yes	Auto.	or wiring error.
20	Alert	Compressor B1 sensor failure	Circuit B shut down	Yes	Auto.
21		Reset thermistor failure	Normal set point used	No	Auto.

22		Discharge pressure transducer failure, circuit A	Circuit A shut down	Yes	Auto.
23		Discharge pressure transducer failure, circuit B	Circuit B shut down	Yes	Auto.
24	Alert	Suction pressure transducer failure, circuit A	Circuit A shut down	No	Auto.	Transducer failure or wiring error.
25	Alert	Suction pressure transducer failure, circuit B	Circuit B shut down	No	Auto.	Transducer failure or wiring error.
25		Suction pressure transducer failure, circuit B	Circuit B shut down	No	Auto.
26		Oil pressure transducer failure, circuit A	Circuit A shut down	No	Auto.
27		Oil pressure transducer failure, circuit B	Circuit B shut down	No	Auto.

28	Alarm	Transducer supply voltage low	Unit shut down	No	Auto.	Unit voltage low or PS1 faulty.
29	Alarm	LOCAL/ENABLE-STOP-CCN	Unit shut down	No	Manual	Switch failure or wiring error.
29		LOCAL/ENABLE-STOP-CCN	Unit shut down	No	Manual	Switch failure or wiring error.

30	Alert	4-20 mA reset input failure	Normal set point used	No	Auto.
31	Alert	4-20 mA demand limit failure	Demand limit ignored	No	Auto.
31		4-20 mA demand limit failure	Demand limit ignored	No	Auto.
32		Loss of communication with DSIO-LV	Unit shut down	No	Auto.	Wiring error or faulty module
32		Loss of communication with DSIO-LV	Unit shut down	No	Auto.	Wiring error or faulty module
	Alarm					or improper address code.
33	Alarm	Loss of communication with DSIO-EXV	Unit shut down	No	Auto.
33		Loss of communication with DSIO-EXV	Unit shut down	No	Auto.
34		Loss of communication with 4 In/4 Out module	Unit shut down	Yes	Auto.

35	Ð	Not used	Ð	Ð	Ð	Ð

36		Low refrigerant pressure circuit A	Circuit A shut down	No	*	Low refrigerant charge, plugged ®lter
	Alert					drier, faulty expansion valve.
37	Alert	Low refrigerant pressure circuit B	Circuit B shut down	No	*	Low refrigerant charge, plugged ®lter
37		Low refrigerant pressure circuit B	Circuit B shut down	No	*	Low refrigerant charge, plugged ®lter
						drier, faulty expansion valve.

38		Failure to pump out circuit A	Circuit A shut down	No	Manual	Faulty expansion valve, transducer,
	Alert					or thermistor.
39	Alert	Failure to pump out circuit B	Circuit B shut down	No	Manual	Faulty expansion valve, transducer,
39		Failure to pump out circuit B	Circuit B shut down	No	Manual	Faulty expansion valve, transducer,
						or thermistor.

40		Low oil pressure circuit A	Circuit A shut down	No	Manual	Low oil level, circuit breaker trip,
						faulty expansion valve, crankcase
	Alert					heater, or pressure transducer.
41	Alert	Low oil pressure circuit B	Circuit B shut down	No	Manual	Low oil level, circuit breaker trip,
41		Low oil pressure circuit B	Circuit B shut down	No	Manual	Low oil level, circuit breaker trip,
						faulty expansion valve, crankcase
						heater, or pressure transducer.
42		Cooler freeze protection	Unit shut down	No	*	Low ¯uid ¯ow or faulty thermistor.
43	Alarm	Low cooler ¯uid ¯ow	Unit shut down	No	Manual	Chilled ¯uid pump failure
44						or faulty thermistor.
						or faulty thermistor.
		Low suction temperature circuit A	Circuit A shut down	No	Manual	Faulty expansion valve or thermistor.
	Alert		after 10 minutes
45	Alert	Low suction temperature circuit B	Circuit B shut down	No	Manual	Faulty expansion valve or thermistor.
45		Low suction temperature circuit B	Circuit B shut down	No	Manual	Faulty expansion valve or thermistor.
			after 10 minutes
46		High suction superheat circuit A	Circuit A shut down	Yes	Manual	Low charge, faulty expansion valve or
	Alert					thermistor, or plugged ®lter drier.
47	Alert	High suction superheat circuit B	Circuit B shut down	Yes	Manual	Low charge, faulty expansion valve or
47		High suction superheat circuit B	Circuit B shut down	Yes	Manual	Low charge, faulty expansion valve or
						thermistor, or plugged ®lter drier.

48	Alert	Low suction superheat circuit A	Circuit A shut down	Yes	Manual	Faulty EXV or thermistor.
49	Alert	Low suction superheat circuit B	Circuit B shut down	Yes	Manual	Faulty EXV or thermistor.
49		Low suction superheat circuit B	Circuit B shut down	Yes	Manual	Faulty EXV or thermistor.

50		Illegal con®guration	Unit cannot start	Ð	Manual	Con®guration error.
51	Alarm	Initial con®guration required	Unit cannot start	Ð	Manual	Con®guration omitted.
52		Emergency stop by CCN command	Unit shut down	Yes	CCN	Network command.

53		Cooler pump interlock failure	Unit shut down	No	Manual	Failure of cooler pump or controls
54	Alarm	Cooler pump interlock failure	Unit shut down	No	Manual	Failure of cooler pump or controls
55		Cooler pump interlock failure	Cooler pump shut down	Ð	Manual	Failure of cooler pump relay or interlock
56	Alert	WSM communication failure	WSM forces removed	Ð	Auto.	Wiring fault or module failure

57		Calibration required for discharge pressure	Circuit cannot start	Ð	Auto.
		transducer, circuit A
58		Calibration required for discharge pressure	Circuit cannot start	Ð	Auto.
		transducer, circuit B
59		Calibration required for suction pressure	Circuit cannot start	Ð	Auto.
	Alert	transducer, circuit A				Transducer not calibrated
60	Alert	Calibration required for suction pressure	Circuit cannot start	Ð	Auto.	Transducer not calibrated
60		Calibration required for suction pressure	Circuit cannot start	Ð	Auto.
		transducer, circuit B
61		Calibration required for oil pressure	Circuit cannot start	Ð	Auto.
		transducer, circuit A
62		Calibration required for oil pressure	Circuit cannot start	Ð	Auto.
		transducer, circuit B

30GN040-420 specifications

The Carrier 30GN040-420 is a well-regarded model within the industry of chillers, designed to deliver efficient cooling solutions for a variety of commercial applications. Its compact design and advanced technology make it an ideal choice for businesses looking to optimize their HVAC systems.

One of the standout features of the Carrier 30GN series is its flexibility. This chiller model is available in a range of capacities, specifically from 40 to 420 tons, allowing for customized solutions based on specific cooling demands. Such versatility enables this unit to cater to a broad array of installations, from small commercial spaces to larger industrial facilities.

The Carrier 30GN040-420 utilizes a scroll compressor design, known for its reliability and efficiency. The scroll technology allows for a reduction in the number of moving parts, resulting in lower maintenance costs and increased durability. Additionally, the unit operates with environmentally friendly refrigerants such as R-410A, promoting sustainability without compromising performance.

Energy efficiency is another significant aspect of this model. The 30GN series is designed to provide high energy efficiency ratios (EER), which translates to lower operational costs for users over the lifespan of the unit. This is particularly beneficial in an era where energy costs are consistently rising.

The advanced controls found within the Carrier 30GN040-420 further enhance its performance and ease of use. The unit is equipped with a microprocessor-based control system that allows for precise temperature management while providing valuable diagnostic information. This feature not only improves the overall reliability of the system but also facilitates proactive maintenance, reducing the risk of unscheduled downtime.

Moreover, the design of the Carrier 30GN040-420 emphasizes quiet operation, making it suitable for environments where noise levels must be minimized. This characteristic is critical for applications in hospitals, schools, or office buildings, where a peaceful atmosphere is essential.

In summary, the Carrier 30GN040-420 chiller provides a robust solution for businesses requiring dependable and efficient cooling. Its features, including flexible capacity options, reliable scroll compressors, energy-efficient performance, advanced controls, and quiet operation, position it as a top choice for various commercial and industrial applications. As technology continues to evolve, models such as the 30GN series remain at the forefront, meeting the demands of modern HVAC needs while ensuring sustainability and efficiency.

Table 16 Ð Alarm and Alert Codes

LOCAL/ENABLE-STOP-CCN

30GN040-420 specifications