Carrier 69NT20-531-300 manual Error Description, Memory failure

Table 3-6 Controller Alarm Indications (Sheet 4 of 4)

NOTE

If the Controller is configured for four probes without a DataCORDER, the DataCORDER alarms AL70 and AL71 will be processed as Controller alarms AL70 and AL71. Refer to Table 3-10.

		The Controller performs self-check routines. if an internal failure occurs, an
		“ERR” alarm will appear on the display. This is an indication the Controller
		needs to be replaced.
		ERROR	DESCRIPTION
		ERR 0 - RAM failure	Indicates that the Controller working memory has
			failed.
	Internal	EER 1 - Program	Indicates a problem with the Controller program.
ERR		Memory failure
	Microprocessor
		EER 2 - Watchdog	The Controller program has entered a mode whereby
#	Failure
		time-out	the Controller program has stopped executing.
		EER 3 - On board timer	The on board timers are no longer operational.
		failure	Timed items such as; defrost, etc. may not work.
		EER 4 - Internal counter	Internal multi-purpose counters have failed. These
		failure	counters are used for timers and other items.
		EER 5 - A-D failure	The Controller’s Analog to Digital (A-D) converter
			has failed.
Entr	Enter Setpoint
	(Press Arrow &	The Controller is prompting the operator to enter a set point.
StPt	Enter)
	Low Main Voltage
LO	(Function Codes	This message will be alternately displayed with the set point whenever the sup-
	Cd27-38 disabled
		ply voltage is less than 75% of its proper value.
	and NO alarm
	stored.)

T-309 3-20