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

Page 45
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Carrier 69NT20-531-300 manual Error Description, Memory failure

69NT20-531-300 specifications

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