Carrier HS070-160 manual Operating Modes Alarms

Table 7 - Display Codes

OPERATING MODES

			ALARMS
		Action		Reset
Display	Description	Taken Sv			Probable Cause
				Method
		Control

Comp	Al	Al	FailureCircuit			A	shut	off	M a n u a l	High pressure switch trip or high discharge gas temp
			Failure		Comp	shut off			M a n u a l	switch trip, on when it is not supposed to be on. Wiring
Campo p	A2Bl	ii:	Failure		Circuit	B	shut	off	M a n u a l	error between electronic control and compressor relay.
Comp		B 2	Failure		Comp	shut off			M a n u a l
Loss of charge circuit A					Circuit	A	shut	off	M a n u a l	Low refrigerant charge, or loss of charge pressure switch
Loss of charge circuit B					Circuit	B	shut	off	M a n u a l	failure.
Low cooler flow					Unit shut		off		M a n u a l	No cooler flow or reverse cooler flow
Low oil pressure circuit A					Circuit	A	shut	off	M a n u a l	Oil pump failure or low oil level, or switch failure.
low oil pressure circuit B					Circuit	B	shut	off	m a n u a l
Freeze	protection				Unit shut		off		Auto.	Low cooler flow
High suction superheat circuit A					Circuit	A	shut	off	M a n u a l	Low charge or EXV failure, or plugged filter drier.
High suction superheat circuit B					Circuit	B	shut	off	M a n u a l
Low suction suoerheat circuit A					Circuit	A	shut	off	M a n u a l	EXV failure ar cooler thermistor error.
Low suction superheat circuit B					Circuit	6	shut	off	M a n u a l
Leaving	water	thermistor		failure	Unit shut		off		Auto.	Thermistor failure, or wiring error, or thermistor not
Entering	water	thermistor		failure	Use default value				Auto.	connected to input terminals.
Cooler thermistor failure circuit A					Circuit	A	shut	off	Auto.
Cooler thermostor failure circuit B					Circuit	B	shut	off	Auto.
Comp thermistor failure circuit A					Circuit	A	shut	off	Auto.
Comp thermistor failure circuit B					Circuit	B	shut	off	Auto.
Reset thermistor			failure		Stop reset				Auto.

NOTES:

1.Freeze protection trips at 35 F (1.7 C) for water and 6 degrees F (3.3 degrees C) below set point for brine units. Resets at 6 degrees above set point.

2.All auto. reset failures that cause the unit to stop will restart the unit when the error has been corrected.

3.All manual reset errors must be reset by moving the control switch to STANDBY then to RUN.

4.Valid resistance range for thermistors is 363,000 ohms to 216 ohms.

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