4–8
469 MOTOR MANAGEMENT RELAY – INSTRUCTION MANUAL
CHAPTER 4: INTERFACES
MESSAGE
key, followed by the
MESSAGE
key, to scroll through the messages. For
additional information and a complete list of diagnostic messages, refer to
Diagnostic
Messages in Chapter 6
.
4.1.8
Self-Test Warnings
The 469 relay performs self test diagnostics at initialization (after power up) and
continuously as a background task to ensure the hardware and software is functioning
correctly. Self-test warnings indicate either a maintenance alert, or a minor or major
problem. Maintenance alerts and minor problems are problems that does not compromise
motor protection. Major problems are very serious problems that compromise all aspects
of relay operation. Upon detection of either a minor or a major problem the relay will:
• De-energize the self-test warning relay
• Light the self-test warning LED
• Flash a diagnostic message periodically on the display screen
Upon detection of a maintenance alert, the relay will flash a diagnostic message on the
screen, or record an event. The self-test relay remains energized and the service LED
remains off.
Table 4–1: Self-Test Warnings
Message
Severity
Failure description
Self-Test Warning 1
Replace Immediately
Major
Caused by detection of a corrupted location in the
program memory as determined by a CRC error
check. Any function of the relay is susceptible to
malfunction from this failure.
Self-Test Warning 2
Replace Immediately
Major
Caused by a failure of the analog to digital
converter A/D1. The integrity of system input
measurements is affected by this failure.
Self-Test Warning 3
Replace Immediately
Major
Caused by a failure of the analog to digital
converter A/D2. The integrity of system input
measurements is affected by this failure.
Self-Test Warning 5
Replace Immediately
Major
Caused by out of range reading of self-test
RTD 13. The integrity of system input
measurements is affected by this failure.
Self-Test Warning 6
Replace Immediately
Major
Caused by out of range reading of self-test
RTD 14. The integrity of system input
measurements is affected by this failure.
Self-Test Warning 7
Replace Immediately
Major
Caused by out of range reading of self-test
RTD 15. The integrity of system input
measurements is affected by this failure.
Self-Test Warning 8
Replace Immediately
Major
Caused by out of range reading of self-test
RTD 16. The integrity of system input
measurements is affected by this failure.
Self-Test Warning 9
Maintenance
Alert
Occurs if the microprocessor has reset
unexpectedly and system input measurements
were interrupted for at least 2 seconds. This
warning appears in the event recorder.
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