Carrier 30RA/RH, 30RY/RYH manual Alarm Code Descriptions

ALARM CODE DESCRIPTIONS (continued)

ALARM	ALARM NAME	ALARM DESCRIPTION	ACTION TAKEN BY	RESET TYPE	PROBABLE CAUSE
CODE			THE CONTROL
30	Low refrigerant pressure failure,	Circuit running and the suction pressure	Circuit shut down	Automatic when pressure returns to	Shortage of refrigerant, filter blocked or
	circuit A	below threshold		normal and if the same fault has not	faulty pressure sensor
				occurred the same day (machine
				equipped with CCN/clock board, If not,
				manual)
31	Low refrigerant pressure failure,	As above	As above	As above	As above
	circuit B
32	High pressure failure, circuit A	Circuit running and the discharge pressure	Circuit shut down	Manual, the high pressure switch must	Fan circuit fault, high condenser
		exceeds the high pressure trip point		be reset manually with the push-button	entering air temperature
				located on or in the pressure switch
33	High pressure failure, circuit B	As above	As above	As above	As above
34	Reverse compressor rotation,	One circuit compressor runs in reverse	As above	As above	Incorrect compressor wiring
	circuit A	rotation
35	Reverse compressor rotation,	As above	As above	As above	As above
	circuit B
36	Water heat exchanger frost	The heat exchanger entering or leaving	Unit shut down	Automatic if the same alarm has not	Low water flow or defective thermistor
	protection	water sensor is below the frost trip point		tripped the same day (machine equipped
				with CCN/clock board, If not, manual)
37	Repeated low evaporator	More than 6 successive circuit capacity	Circuit shut down	Manual	Faulty pressure sensor, clogged filter or
	suction temperature unloading,	unloads because of low suction temperature			low refrigerant charge
	circuit A	override.
38	Repeated low evaporator suction	As above	As above	As above	As above
	temperature unloading, circuit B
39	Repeated high pressure	More than 6 successive circuit capacity	None	Automatic	Faulty transducer, high condenser
	unloading, circuit A	unloads because of high pressure override.			entering air temperature, high entering
					water temperature, condenser fouled
					fan flow rate too low.
40	Repeated high pressure	As above	As above	As above	As above
	unloading, circuit B
41	Repeated high discharge	More than 8 successive circuit capacity	As above	As above	Pressure sensor faulty or heat
	temperature unloading in	unloads because of high discharge			exchanger fouled
	heating mode, circuit A	temperature
42	Repeated high discharge	As above	As above	As above	As above
	temperature unloading in
	heating mode, circuit B
43	Repeated low suction	More than 8 successive circuit capacity	As above	As above	Pressure sensor faulty, filter obstructed,
	temperature unloading in	unloads because of low suction temperature			shortage of refrigerant, heat exchanger
	heating mode, circuit A				fouled or fan faulty.
44	Repeated low suction	As above	As above	As above	As above
	temperature unloading in
	heating mode, circuit B
45	Low heat exchanger entering	Heat exchanger temperature is too low (less	Unit shut down	As above	As above
	water temperature in heating	than 10°C), preventing unit start-up
	mode
46	Safety interlock open	Safety interlock not closed before end of the	Unit prevented to start	Manual	Evaporator pump control or water flow
		start-up delay or opens during operation	or shut down		switch failure
47	Pump #1 fault	Evap. water pump run contact opens while	Unit shut down	Manual	Pump overheat, incorrect pump
		the pump has received a command to be on			connection
48	Pump #2 fault	As above	Unit shut down	Manual	As above
49	CCN emergency stop	CCN command received to shutdown the	Unit shut down	Manual	Network command
		unit
50	Loss of communication with	The unit is controlled by a System Manager	Unit returns to	Automatic when communication is re-	Defective CCN bus wiring or system
	System Manager	and communication with this module is lost	autonomous operating	established	module failure
		for more than 2 minutes	mode
51	Communication failure with the	The master/slave link is broken due to a	As above	As above	As above
	master or the slave unit	loss of communication between the two
		units for more than 2 minutes
52	Initial factory configuration	All factory parameters are zero	Unit prevented to start	Automatic	No factory configuration
	required
53	Illegal factory configuration	Wrong factory configuration	As above	Automatic	Factory configuration error
54	Master/slave configuration error	Wrong master/slave configuration	Master/slave control	Automatic	Master or slave configuration error
			disabled
	Maintenance alerts	A maintenance alert is active	None	Manual
55-2	Water loop flow rate too low
55-4	Maintenance delay, pump 1,
	elapsed
55-5	Maintenance delay, pump 2,
	elapsed
55-6	Maintenance delay, water filter,
	elapsed

Order No. 13444-76, 06.2005. Supersedes order No.: 13429-76, 06.2004. Manufacturer reserves the right to change any product specification without notice.

Manufactured by: Carrier s.a., Montluel, France. Printed in the Netherlands on chlorine-free paper.